CA2121219A1 - Methods using repositionable instructions and kits containing same - Google Patents
Methods using repositionable instructions and kits containing sameInfo
- Publication number
- CA2121219A1 CA2121219A1 CA 2121219 CA2121219A CA2121219A1 CA 2121219 A1 CA2121219 A1 CA 2121219A1 CA 2121219 CA2121219 CA 2121219 CA 2121219 A CA2121219 A CA 2121219A CA 2121219 A1 CA2121219 A1 CA 2121219A1
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- Prior art keywords
- dental
- sheet
- printed
- procedure
- health care
- Prior art date
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Abstract
A method for performing a multiple-step health care procedure comprises the use of a repositionable pre-printed instruction sheet. Kits comprising materials used in a health care procedure and a respositionable pre-printed instruction sheet are also described.
Description
METHODS USING REPOSITIONABLE INSTRUCTIONS
AND KITS CONTAINING SAME
Field of Invention This invention relates to multiple step health care procedures. More specifically, this invention relates to a method of performing multiple step health care procedures using a pre-printed repositionable instruction sheet.
Background of the Invention The health care industry continues to develop more and more advanced materials and methods for carrying out procedures to improve the physical well-being of patients. As technologies in this field advance, the procedures to be carried out by the health care provider become more and more complex and diverse, including multiple steps that must be performed in certain sequential order or in certain time frames. Instructions are generally provided with each kit for performing certain health care procedures, which instructions are generally provided on small pre-printed sheets .
U.S. Patent No. 5,178,419 to Bolnick et al. discloses a label form for use in drug testing and methods for applying same. This patent describes a multi-segment label set form, which in one embodiment has a first label segment with a permanent adhesive backing layer and second and third label segments having temporary adhesive backing layers. The label segments are provided with information to identify the patient participating in the test, thedrug being tested and other study information.
CA2 1 2 i 2 1 9 Summary of the Invention The present invention provides a method for performing a multiple-step health care procedure, which method comprises use of a pre-printed instruction sheet having instructions for a plurality of steps of said health care procedure pre-printed on the sheet. The sheet is provided with a repositionable adhesive applied in an amount effective for repositionably adhering said sheet to an intended substrate.
The present invention also provides a kit for a multiple-step health care procedure. The kit comprises health care materials and at least one repositionable pre-printed instruction sheet having instructions for use of said health care materials in a plurality of steps of a health care procedure pre-printed on the sheet.
Brief descriPtion of the Drawing The Figure shows a plan view of a repositionable pre-printed instruction sheet of the present invention.
Detailed Descri~tion The present invention finds particular utility in multiple step procedures carried out in the health care industry and especially for procedures that are carried out in a clean environment. In these environments, it is desirable to provide instructions that may be placed at locations convenient for viewing by the health care practitioner without the requirement of using special clips or other holding devices to hold the instruction sheet. It is also desirable to have instructions that are disposable, to avoid sterilization difficulties. Instructions are useful becausesimilar procedures may be carried out using any one of a number of different manufacturer's products, and each product will often involve a slightly different protocol as compared to CA2 ~ 2 1 2 1 9 others in the same general class. Thus, the present invention is ideally suited for dental and orthodontic procedures and medical office procedures that require multiple steps.
The practitioner may place the respositionable pre-printed instructions at a location convenient for viewing during the procedure, such as on the headrest or arm of the patient chair, on the instrument table, or any other convenient location. The repositionable adhesive of the pre-printed instructions provides hands-off review of the instructions while at the same time providing easy removal of the pre-printed instructions following completion of the procedure without fear of damaging the substrate to which the instructions were attached. The disposable nature of such instructions eliminates sterilization procedures that would be required for reusable instructions.
The present invention provides particular advantage in a clean or sterile environment, because the hands-off review capability allows the health care practitioner to maintain a clean field or, alternatively, a sterile field without having to stop during a procedure to handle the instructions.
The present invention is particularly useful in the context of teaching environments, such as universities and where a new material is being used for the first time.
One example of a health care procedure that particularly benefits from the use of the present invention is the use of a dental adhesive. A
multiplicity of different dental adhesives are currently available in the market, each using their own specific technique. A complete dental adhesive system may comprise an etchant or conditioner, one or more primer solutions, one or more adhesive components and a restorative material to be bonded to the tooth and CA2 1 2 1 ~ 1 9 possibly other materials as well. Additionally, polymerization initiators may be added to one or more of these solutions as a separate step, or one or more components may be provided with a photoinitiator which necessitates the use of a curing light to initiate polymerization of the adhesive. Some of 5 these materials may be rinsed off of the tooth, while others should be kept as dry as possible. Some components should be applied in only a thin layer, while other components should be applied in multiple layers in order to maximize effectiveness of the adhesive bond. The dental practitioner, when faced with such an array of different products and different techniques, may 10 easily become confused and apply the components in the wrong order, in inappropriate amounts, omit a step or not provide sufficient time for curing, drying, etching, and the like.
In another aspect of the present invention, some dental materials may be used in a number of different applications. Technique guides for each of these applications may be advantageously provided with the materials so that alternative procedures may be easily and conveniently performed by the dental professional.
Specific techniques benefitting from the use of repositionable instructions include bonding of various diverse materials to tooth structure, such as amalgam fillings, porcelain, metal articles, bridges, veneers, dental composites and the like. Other dental procedures wherein the present invention has particular utility include application of fluoride treatments, application of sealing compositions, bleaching teeth, taking dental impressions, placement of provisional tooth restorations, the use of electronic anesthesia and the like.
Repositionable preprinted instructions may find utility in the dental lab as well, in carrying out ~21 ~12~
procedures such as preparation of prosthetic devices such as porcelain crowns, inlays, onlays, veneers, dentures, bridges and the like. Included in such procedures are the intermediate steps carried out by the dental lab in fabrication of the ultimate article, such as preparation of investment materials and the like. Other dental lab procedures include fabrication of dental appliances, orthodontic appliances, mouthguards and the like. A third category of dental lab procedures is the preparation of dental models.
Other health care procedures also may benefit from the present invention, such as preparing an orthopedic cast or splint, placing an artificialligament or bone replacement structure, operative procedures utilizing unique surgical drapes or wound disinfection techniques, surgical stapling procedures, placement of electronic implants such as cardiac pacemaker and the like. Medical laboratories particularly may find the present invention useful for providing convenient instructions for performing various diagnostic tests, for example on blood, urine and bodily fluids, tissues and by-products.
One example of such a test particularly suited for use of the present invention is the home pregnancy test, which contains instructions unfamiliar to the user and which is usually performed in the bathroom where counterspace may be limited.
The pre-printed instructions may describe the entire procedure to be performed, or may relate only to a particular step or steps that benefit from convenient repositionable instructions. It will be understood that the instructions may optionally be placed in a location convenient for viewing by the patient for use in carrying out certain tasks during the health care procedure .
The present invention also provides a kit for a multiple-step health care procedure. The kit comprises CA2 1 2 1 ~ 1 9 health care materials and at least one repositionable pre-printed instruction sheet having instructions for use of said health care materials in a plurality of steps of a health care procedure pre-printed on the sheet. Preferably, the kit comprises a plurality of repositionable pre-printed instruction sheets in the form of a pad. In this embodiment, the health care professional is provided with a convenient fully disposable instruction sheet that can be discarded after a single use, with a new sheet being available for use with the next patient.
The kit preferably contains pre-printed repositionable instructions, together with multiple components of a dental adhesive system.
Alternatively, the kit may contain the instructions with only one or two key materials used in a health care procedure, such as a kit comprising a dental adhesive material and a dental restorative material. Other key materials are, for example, a dental glass ionomer or a luting cement.
As used herein, "repositionable" refers to the ability to be repeatedly adhered to and removed from a substrate without substantial loss of adhesion capability and without damage to the intended substrate upon removal. Most preferably, the pre-printed instructions of the present invention may be adhered to and removed from a 20 pound white bond xerographic quality paper substrate for three cycles with no more than 75%
loss of peel adhesion. In another aspect, the present invention is removable from a substrate when it has been adhered to the substrate over a long period of time. Thus, preferably the adhesive used in the present invention does not develop excessive adhesion build-up over time.
To show repositionable adhesion to the intended substrate, a pre-printed instruction sheet having a repositionable adhesive is applied to 20 pound white bond xerographic quality paper for 5 cycles, with the paper being adhered to the pre-printed instructions for 24 hours for each cycle. Preferably, the pre-printed instruction sheet is removed from the paper at about 12 inches per minute and at 180 degree peel. After completion of the 5 cycles the pre-printed instruction sheet will support its own weight when suspended from a vertical or the underside of a horizontal white bond 20 pound xerographic quality paper substrate. Preferably, the pre-printed instruction sheet has sufficient shear and peel adhesion strength that it may be adhered to the underside of a white bond 20 pound xerographic quality paper substrate at any angle desired, including the underside of a substrate having a 45 degree angie position. The pre-printed instruction sheet has sufficient adhesion on its first application to a vertical white bond 20 pound xerographic quality paper substrate that it will hold its own weight (i.e not fall off of the substrate) for at least 24 hours.
Removability of the repositionable pre-printed instruction sheet without damage to the substrate is evaluated by applying a pre-printed instruction sheet having repositionable adhesive to 20 pound white bond xerographic quality paper and applying pressure with three passes of a 5 kg roller to ensure full adhesive contact. The pre-printed instruction sheet is removed from the paper at a rate of about 12 inches per minute and at 180 degree peel with no tear or damage to the substrate paper.
As note above, the pre-printed instructions of the present invention are capable of being repositionably adhered to any desired substrate. A
repositionable adhesive as described herein is provided on the instruction sheet for this purpose. This adhesive preferably is provided on the opposite side of the sheet from the pre-printed instruction, but may optionally be provided at any appropriate location on the sheet. The entire back side surface of the sheet may be coated with repositionable adhesive, but preferably the repositionable adhesive is provided as a strip in an amount sufficient to support the weight of the pre-printed sheet when applied to a 5 vertical surface.
A repositionable adhesive may be provided through any of a number of recognized modes of providing a repositionable adhesive. Ideally, depending on the substrate, the removable adhesive must provide sufficient tack (or quick stick) to quickly fix the adhesive to the desired substrate, 10 sufficiently low peel strength to prevent damage of the surface when the adhesive is removed, and have the appropriate cohesive strength to control the transfer of adhesive to the substrate. Cold flow of the adhesive on a surface should be avoided, because this leads to an undesirable building of peel strength over time.
Preferably, the adhesive is an acrylate- or methacrylate-based adhesive system comprising infusible, solvent dispersible, solvent insoluble, inherently tacky, elastomeric copolymer microspheres as disclosed in U.S.
Pat. No. 3,691,140. Alternatively, this adhesive composition may comprise hollow, polymer, acrylate, infusible, inherently tacky, solvent insoluble, solvent dispersible, elastomeric pressure-sensitive adhesive microspheres as disclosed in U.S. Pat. No. 5,045,569.
Preferably, the repositionable adhesive utilized herein comprises between about 60-100% by weight of hollow, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomericpressure-sensitive adhesive microspheres having a diameter of at least 1 micrometer, and between about 0-40% by weight of a non-spherical polyacrylate ~A2121219 adhesive. These hollow microspheres are made in accordance with the teaching of European Patent Application 371,635. The non-spherical polyacrylate adhesive may be any conventional pressure-sensitive adhesive.
Examples of such adhesives are polymers made from the "soft" monomers such as n-butyl acrylate, isooctyl acrylate, or the like, or copolymers made from a soft component, such as isobutylene, n-butyl acrylate, isooctyl acrylate, ethyl hexyl acrylate, or the like; and a polar monomer such as acrylic acid, acrylonitrile, acrylamide, methacrylic acid, methyl methacrylate or the like. Non-spherical polyacrylate adhesives are commercially available, for example, as the Rohm and Haas RhoplexTM line of adhesives. Preferably, the non-spherical polyacrylate adhesive is present in the repositionable adhesive at an amount of about 10-35% by weight. When the repositionable adhesive additionally comprises a non-spherical polyacrylate adhesive, improved anchorage of the total adhesive to the pre-printed instruction sheet is observed, resulting in less adhesive residue being left on the substrate after removal. Also, tacky microsphere-containing repositionable adhesives comprising non-spherical polyacrylate adhesive exhibit excellent shear adhesion properties, even for highly textured vertical surfaces. These advantageous adhesive properties are obtained with excessive adhesion to substrates such as painted walls that would result in peeling of the paint off of the wall when the film adhesive composite is removed .
Repositionable adhesives are also known in which microspheres contained in the adhesive are non-tacky. A disclosure of this type of adhesive is provided in U.S. Pat. No. 4,735,837 to Miyasaka.
A repositionable adhesive may be provided by addition of components to conventional adhesive C A 2 1 2 1 2 ~ 9 formulations to modify their tack and flow characteristics. U.S. Patent No.
4,599,265 (Esmay) discloses an adhesive having a high degree of cohesive strength that has low tack and maintains peelability from a variety of ordinary substrates. U.S. Patent No. 4,737,559 (Kellen et al.) describes a PSA formulation in which the viscous flow, and resultant adhesion buildup, is controlled through the addition of a small amount of a free radically polymerizable photocrosslinker.
Another means for providing a repositionable adhesive through the reduction of the adhesive contact area is accomplished by the deposition of a discontinuous or patterned film on a backing. W0 85/04602 (Newing et al.) describes pressure-sensitive adhesive articles comprising a plurality of discontinuous adhesive segments in a pattern on at least a portion of at least one side of a carrier or backing, covering from about ten to about thirty percent of the total surface area of that carrier material. European Patent Application 276,557 (Fry) describes a repositionable pressure-sensitive sheet material comprising a sheet material bearing on one surface a discontinuous non-repetitive adhesive coating covering about 10 to about 85 percent of the surface in the form of individual adhesive islands. U.S. Patent No.
4,889,234 (Sorenson et al.) discloses a discontinuous patterned adhesive label structure in which the level of adhesion is varied according to area of adhesive coverage on the label, the pattern in which the adhesive is coated, and the full coverage adhesive characteristics of the materials used.
European Patent Application 279,579 (Tanuma et al.) describes pressure-sensitive adhesive sheets comprising, in one embodiment, a continuous adhesive layer having "irregular sections" (i.e., ".. the pressure-sensitive ~A2 ~ 2 ~ 2 1 9 adhesive layer is uneven..."). The uneven adhesive layer, according to the application, is imparted through a variety of pressing, molding, and embossing methods.
Optimal repositionable adhesives used in the present pre-printed instruction sheet provide very little adhesive transfer to the substrate to which the pre-printed instruction sheet is adhered upon removal of the sheet. When the adhesive used contains tacky microspheres, the following test may be performed to determine the amount of microsphere transfer:
An area of coated sheet material is marked and observed using an optical microscope. The number of microspheres within the area are counted and this number designated "Y". The marked area of the coated sheet is then adhered to KromekoteTM paper, a commercially available paper for the printing industry, for a few seconds and then removed. The marked area is again observed with an optical microscope, and the number of microspheres remaining in the area are counted and this number designated "Z". Percent microsphere transfer is defined as 100 times the ratio of the difference between the number of microspheres initially present (in the marked area of the coated sheet) after coating and the number of microspheres remaining in the marked area after each adhesion and removal from the paper substrate (Y - Z) to the number of microspheres initially present in the area just after coating.
Percent transfer = 1 OO(Y-Z) y Preferably, the repositionable adhesive of the present invention has a microsphere transfer of no more than 25%.
When the repositionable adhesive does not contain microspheres, a similar measurement may be performed by determining the weight of adhesive transferred to a substrate from a pre-printed instruction sheet having a known amount of adhesive coated thereon. As above, it is desirable to have no more than about 25% of adhesive transferred to the substrate, regardless of the nature of the adhesive.
Detailed Descri~tion of the Drawing Turning now to the Figure, pre-printed instruction sheet 10 is preprinted with instructions 12, 13 and 14 for carrying out the multiple 10 steps for application of a dental adhesive system to a tooth. Repositionable adhesive (not shown) is provided on the opposite side of sheet 10 from pre-printed instructions 12, 13 and 14 to provide repositionable adhesion of sheets 10 to an intended substrate.
AND KITS CONTAINING SAME
Field of Invention This invention relates to multiple step health care procedures. More specifically, this invention relates to a method of performing multiple step health care procedures using a pre-printed repositionable instruction sheet.
Background of the Invention The health care industry continues to develop more and more advanced materials and methods for carrying out procedures to improve the physical well-being of patients. As technologies in this field advance, the procedures to be carried out by the health care provider become more and more complex and diverse, including multiple steps that must be performed in certain sequential order or in certain time frames. Instructions are generally provided with each kit for performing certain health care procedures, which instructions are generally provided on small pre-printed sheets .
U.S. Patent No. 5,178,419 to Bolnick et al. discloses a label form for use in drug testing and methods for applying same. This patent describes a multi-segment label set form, which in one embodiment has a first label segment with a permanent adhesive backing layer and second and third label segments having temporary adhesive backing layers. The label segments are provided with information to identify the patient participating in the test, thedrug being tested and other study information.
CA2 1 2 i 2 1 9 Summary of the Invention The present invention provides a method for performing a multiple-step health care procedure, which method comprises use of a pre-printed instruction sheet having instructions for a plurality of steps of said health care procedure pre-printed on the sheet. The sheet is provided with a repositionable adhesive applied in an amount effective for repositionably adhering said sheet to an intended substrate.
The present invention also provides a kit for a multiple-step health care procedure. The kit comprises health care materials and at least one repositionable pre-printed instruction sheet having instructions for use of said health care materials in a plurality of steps of a health care procedure pre-printed on the sheet.
Brief descriPtion of the Drawing The Figure shows a plan view of a repositionable pre-printed instruction sheet of the present invention.
Detailed Descri~tion The present invention finds particular utility in multiple step procedures carried out in the health care industry and especially for procedures that are carried out in a clean environment. In these environments, it is desirable to provide instructions that may be placed at locations convenient for viewing by the health care practitioner without the requirement of using special clips or other holding devices to hold the instruction sheet. It is also desirable to have instructions that are disposable, to avoid sterilization difficulties. Instructions are useful becausesimilar procedures may be carried out using any one of a number of different manufacturer's products, and each product will often involve a slightly different protocol as compared to CA2 ~ 2 1 2 1 9 others in the same general class. Thus, the present invention is ideally suited for dental and orthodontic procedures and medical office procedures that require multiple steps.
The practitioner may place the respositionable pre-printed instructions at a location convenient for viewing during the procedure, such as on the headrest or arm of the patient chair, on the instrument table, or any other convenient location. The repositionable adhesive of the pre-printed instructions provides hands-off review of the instructions while at the same time providing easy removal of the pre-printed instructions following completion of the procedure without fear of damaging the substrate to which the instructions were attached. The disposable nature of such instructions eliminates sterilization procedures that would be required for reusable instructions.
The present invention provides particular advantage in a clean or sterile environment, because the hands-off review capability allows the health care practitioner to maintain a clean field or, alternatively, a sterile field without having to stop during a procedure to handle the instructions.
The present invention is particularly useful in the context of teaching environments, such as universities and where a new material is being used for the first time.
One example of a health care procedure that particularly benefits from the use of the present invention is the use of a dental adhesive. A
multiplicity of different dental adhesives are currently available in the market, each using their own specific technique. A complete dental adhesive system may comprise an etchant or conditioner, one or more primer solutions, one or more adhesive components and a restorative material to be bonded to the tooth and CA2 1 2 1 ~ 1 9 possibly other materials as well. Additionally, polymerization initiators may be added to one or more of these solutions as a separate step, or one or more components may be provided with a photoinitiator which necessitates the use of a curing light to initiate polymerization of the adhesive. Some of 5 these materials may be rinsed off of the tooth, while others should be kept as dry as possible. Some components should be applied in only a thin layer, while other components should be applied in multiple layers in order to maximize effectiveness of the adhesive bond. The dental practitioner, when faced with such an array of different products and different techniques, may 10 easily become confused and apply the components in the wrong order, in inappropriate amounts, omit a step or not provide sufficient time for curing, drying, etching, and the like.
In another aspect of the present invention, some dental materials may be used in a number of different applications. Technique guides for each of these applications may be advantageously provided with the materials so that alternative procedures may be easily and conveniently performed by the dental professional.
Specific techniques benefitting from the use of repositionable instructions include bonding of various diverse materials to tooth structure, such as amalgam fillings, porcelain, metal articles, bridges, veneers, dental composites and the like. Other dental procedures wherein the present invention has particular utility include application of fluoride treatments, application of sealing compositions, bleaching teeth, taking dental impressions, placement of provisional tooth restorations, the use of electronic anesthesia and the like.
Repositionable preprinted instructions may find utility in the dental lab as well, in carrying out ~21 ~12~
procedures such as preparation of prosthetic devices such as porcelain crowns, inlays, onlays, veneers, dentures, bridges and the like. Included in such procedures are the intermediate steps carried out by the dental lab in fabrication of the ultimate article, such as preparation of investment materials and the like. Other dental lab procedures include fabrication of dental appliances, orthodontic appliances, mouthguards and the like. A third category of dental lab procedures is the preparation of dental models.
Other health care procedures also may benefit from the present invention, such as preparing an orthopedic cast or splint, placing an artificialligament or bone replacement structure, operative procedures utilizing unique surgical drapes or wound disinfection techniques, surgical stapling procedures, placement of electronic implants such as cardiac pacemaker and the like. Medical laboratories particularly may find the present invention useful for providing convenient instructions for performing various diagnostic tests, for example on blood, urine and bodily fluids, tissues and by-products.
One example of such a test particularly suited for use of the present invention is the home pregnancy test, which contains instructions unfamiliar to the user and which is usually performed in the bathroom where counterspace may be limited.
The pre-printed instructions may describe the entire procedure to be performed, or may relate only to a particular step or steps that benefit from convenient repositionable instructions. It will be understood that the instructions may optionally be placed in a location convenient for viewing by the patient for use in carrying out certain tasks during the health care procedure .
The present invention also provides a kit for a multiple-step health care procedure. The kit comprises CA2 1 2 1 ~ 1 9 health care materials and at least one repositionable pre-printed instruction sheet having instructions for use of said health care materials in a plurality of steps of a health care procedure pre-printed on the sheet. Preferably, the kit comprises a plurality of repositionable pre-printed instruction sheets in the form of a pad. In this embodiment, the health care professional is provided with a convenient fully disposable instruction sheet that can be discarded after a single use, with a new sheet being available for use with the next patient.
The kit preferably contains pre-printed repositionable instructions, together with multiple components of a dental adhesive system.
Alternatively, the kit may contain the instructions with only one or two key materials used in a health care procedure, such as a kit comprising a dental adhesive material and a dental restorative material. Other key materials are, for example, a dental glass ionomer or a luting cement.
As used herein, "repositionable" refers to the ability to be repeatedly adhered to and removed from a substrate without substantial loss of adhesion capability and without damage to the intended substrate upon removal. Most preferably, the pre-printed instructions of the present invention may be adhered to and removed from a 20 pound white bond xerographic quality paper substrate for three cycles with no more than 75%
loss of peel adhesion. In another aspect, the present invention is removable from a substrate when it has been adhered to the substrate over a long period of time. Thus, preferably the adhesive used in the present invention does not develop excessive adhesion build-up over time.
To show repositionable adhesion to the intended substrate, a pre-printed instruction sheet having a repositionable adhesive is applied to 20 pound white bond xerographic quality paper for 5 cycles, with the paper being adhered to the pre-printed instructions for 24 hours for each cycle. Preferably, the pre-printed instruction sheet is removed from the paper at about 12 inches per minute and at 180 degree peel. After completion of the 5 cycles the pre-printed instruction sheet will support its own weight when suspended from a vertical or the underside of a horizontal white bond 20 pound xerographic quality paper substrate. Preferably, the pre-printed instruction sheet has sufficient shear and peel adhesion strength that it may be adhered to the underside of a white bond 20 pound xerographic quality paper substrate at any angle desired, including the underside of a substrate having a 45 degree angie position. The pre-printed instruction sheet has sufficient adhesion on its first application to a vertical white bond 20 pound xerographic quality paper substrate that it will hold its own weight (i.e not fall off of the substrate) for at least 24 hours.
Removability of the repositionable pre-printed instruction sheet without damage to the substrate is evaluated by applying a pre-printed instruction sheet having repositionable adhesive to 20 pound white bond xerographic quality paper and applying pressure with three passes of a 5 kg roller to ensure full adhesive contact. The pre-printed instruction sheet is removed from the paper at a rate of about 12 inches per minute and at 180 degree peel with no tear or damage to the substrate paper.
As note above, the pre-printed instructions of the present invention are capable of being repositionably adhered to any desired substrate. A
repositionable adhesive as described herein is provided on the instruction sheet for this purpose. This adhesive preferably is provided on the opposite side of the sheet from the pre-printed instruction, but may optionally be provided at any appropriate location on the sheet. The entire back side surface of the sheet may be coated with repositionable adhesive, but preferably the repositionable adhesive is provided as a strip in an amount sufficient to support the weight of the pre-printed sheet when applied to a 5 vertical surface.
A repositionable adhesive may be provided through any of a number of recognized modes of providing a repositionable adhesive. Ideally, depending on the substrate, the removable adhesive must provide sufficient tack (or quick stick) to quickly fix the adhesive to the desired substrate, 10 sufficiently low peel strength to prevent damage of the surface when the adhesive is removed, and have the appropriate cohesive strength to control the transfer of adhesive to the substrate. Cold flow of the adhesive on a surface should be avoided, because this leads to an undesirable building of peel strength over time.
Preferably, the adhesive is an acrylate- or methacrylate-based adhesive system comprising infusible, solvent dispersible, solvent insoluble, inherently tacky, elastomeric copolymer microspheres as disclosed in U.S.
Pat. No. 3,691,140. Alternatively, this adhesive composition may comprise hollow, polymer, acrylate, infusible, inherently tacky, solvent insoluble, solvent dispersible, elastomeric pressure-sensitive adhesive microspheres as disclosed in U.S. Pat. No. 5,045,569.
Preferably, the repositionable adhesive utilized herein comprises between about 60-100% by weight of hollow, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomericpressure-sensitive adhesive microspheres having a diameter of at least 1 micrometer, and between about 0-40% by weight of a non-spherical polyacrylate ~A2121219 adhesive. These hollow microspheres are made in accordance with the teaching of European Patent Application 371,635. The non-spherical polyacrylate adhesive may be any conventional pressure-sensitive adhesive.
Examples of such adhesives are polymers made from the "soft" monomers such as n-butyl acrylate, isooctyl acrylate, or the like, or copolymers made from a soft component, such as isobutylene, n-butyl acrylate, isooctyl acrylate, ethyl hexyl acrylate, or the like; and a polar monomer such as acrylic acid, acrylonitrile, acrylamide, methacrylic acid, methyl methacrylate or the like. Non-spherical polyacrylate adhesives are commercially available, for example, as the Rohm and Haas RhoplexTM line of adhesives. Preferably, the non-spherical polyacrylate adhesive is present in the repositionable adhesive at an amount of about 10-35% by weight. When the repositionable adhesive additionally comprises a non-spherical polyacrylate adhesive, improved anchorage of the total adhesive to the pre-printed instruction sheet is observed, resulting in less adhesive residue being left on the substrate after removal. Also, tacky microsphere-containing repositionable adhesives comprising non-spherical polyacrylate adhesive exhibit excellent shear adhesion properties, even for highly textured vertical surfaces. These advantageous adhesive properties are obtained with excessive adhesion to substrates such as painted walls that would result in peeling of the paint off of the wall when the film adhesive composite is removed .
Repositionable adhesives are also known in which microspheres contained in the adhesive are non-tacky. A disclosure of this type of adhesive is provided in U.S. Pat. No. 4,735,837 to Miyasaka.
A repositionable adhesive may be provided by addition of components to conventional adhesive C A 2 1 2 1 2 ~ 9 formulations to modify their tack and flow characteristics. U.S. Patent No.
4,599,265 (Esmay) discloses an adhesive having a high degree of cohesive strength that has low tack and maintains peelability from a variety of ordinary substrates. U.S. Patent No. 4,737,559 (Kellen et al.) describes a PSA formulation in which the viscous flow, and resultant adhesion buildup, is controlled through the addition of a small amount of a free radically polymerizable photocrosslinker.
Another means for providing a repositionable adhesive through the reduction of the adhesive contact area is accomplished by the deposition of a discontinuous or patterned film on a backing. W0 85/04602 (Newing et al.) describes pressure-sensitive adhesive articles comprising a plurality of discontinuous adhesive segments in a pattern on at least a portion of at least one side of a carrier or backing, covering from about ten to about thirty percent of the total surface area of that carrier material. European Patent Application 276,557 (Fry) describes a repositionable pressure-sensitive sheet material comprising a sheet material bearing on one surface a discontinuous non-repetitive adhesive coating covering about 10 to about 85 percent of the surface in the form of individual adhesive islands. U.S. Patent No.
4,889,234 (Sorenson et al.) discloses a discontinuous patterned adhesive label structure in which the level of adhesion is varied according to area of adhesive coverage on the label, the pattern in which the adhesive is coated, and the full coverage adhesive characteristics of the materials used.
European Patent Application 279,579 (Tanuma et al.) describes pressure-sensitive adhesive sheets comprising, in one embodiment, a continuous adhesive layer having "irregular sections" (i.e., ".. the pressure-sensitive ~A2 ~ 2 ~ 2 1 9 adhesive layer is uneven..."). The uneven adhesive layer, according to the application, is imparted through a variety of pressing, molding, and embossing methods.
Optimal repositionable adhesives used in the present pre-printed instruction sheet provide very little adhesive transfer to the substrate to which the pre-printed instruction sheet is adhered upon removal of the sheet. When the adhesive used contains tacky microspheres, the following test may be performed to determine the amount of microsphere transfer:
An area of coated sheet material is marked and observed using an optical microscope. The number of microspheres within the area are counted and this number designated "Y". The marked area of the coated sheet is then adhered to KromekoteTM paper, a commercially available paper for the printing industry, for a few seconds and then removed. The marked area is again observed with an optical microscope, and the number of microspheres remaining in the area are counted and this number designated "Z". Percent microsphere transfer is defined as 100 times the ratio of the difference between the number of microspheres initially present (in the marked area of the coated sheet) after coating and the number of microspheres remaining in the marked area after each adhesion and removal from the paper substrate (Y - Z) to the number of microspheres initially present in the area just after coating.
Percent transfer = 1 OO(Y-Z) y Preferably, the repositionable adhesive of the present invention has a microsphere transfer of no more than 25%.
When the repositionable adhesive does not contain microspheres, a similar measurement may be performed by determining the weight of adhesive transferred to a substrate from a pre-printed instruction sheet having a known amount of adhesive coated thereon. As above, it is desirable to have no more than about 25% of adhesive transferred to the substrate, regardless of the nature of the adhesive.
Detailed Descri~tion of the Drawing Turning now to the Figure, pre-printed instruction sheet 10 is preprinted with instructions 12, 13 and 14 for carrying out the multiple 10 steps for application of a dental adhesive system to a tooth. Repositionable adhesive (not shown) is provided on the opposite side of sheet 10 from pre-printed instructions 12, 13 and 14 to provide repositionable adhesion of sheets 10 to an intended substrate.
Claims (15)
1. A method for performing a multiple-step health care procedure, which method comprises use of a pre-printed instruction sheet having instructions for a plurality of steps of said health care procedure pre-printed on said sheet, said sheet being provided with a repositionable adhesive applied thereto in an amount effective for repositionably adhering said sheet to an intended substrate.
2. A method for performing a multiple-step dental procedure, which method comprises use of a pre-printed instruction sheet having instructions for a plurality of steps of said dental procedure pre-printed on said sheet, said sheet being provided with a repositionable adhesive applied thereto in an amount effective for repositionably adhering said sheet to an intended substrate.
3. The method of claim 1, wherein said pre-printed instructions may be adhered to and removed from a 20 pound white bond xerographic quality paper substrate for three cycles with no more than 75% loss of peel adhesion.
4. The method of claim 2, wherein said multiple-step dental procedure consists of bonding of dental materials to tooth structure.
5. The method of claim 4, wherein said dental material is selected from the group consisting of amalgam fillings, metal articles, porcelain, bridges, veneers and dental composites.
6. The method of claim 2, wherein said multiple-step dental procedure is selected from the group consisting of application of fluoride treatments, application os sealing compositions, bleaching teeth, taking dental impressions, placement of provisional tooth restorations and the use of electronic anesthesia.
7. The method of claim 2, wherein said multiple-step dental procedure is selected from the group consisting of preparation of prosthetic devices, fabrication of dental appliances, fabrication of orthodontic appliances, fabrication of mouthguards and the preparation of dental models.
8. The method of claim 1, wherein said multiple-step health care procedure is selected from the group consisting of preparing an orthopedic cast or splint, placing an artificial ligament or bone replacement structure, operative procedures utilizing unique surgical drapes or wound disinfection techniques, surgical stapling procedures and placement of electronic implants such as a cardiac pacemaker.
9. The method of claim 1, wherein said multiple-step health care procedure is performing a diagnostic test on material selected from the group consisting of bodily fluids, bodily tissues and bodily by-products.
10. A kit for a multiple-step health care procedure, said kit comprising health care materials and at least one repositionable pre-printed instruction sheet having instructions for use of said health care materials in aplurality of steps of a health care procedure pre-printed on said sheet.
11. A kit for a multiple-step dental procedure, said kit comprising dental materials and at least one repositionable pre-printed instruction sheet having instructions for use of said dental materials in a plurality of steps of a dental procedure pre-printed on said sheet.
12. A kit according to claim 11, wherein said dental materials comprise multiple components of a dental adhesive system.
13. A kit according to claim 11, wherein said dental materials comprise a dental adhesive material and a dental restorative material.
14. A kit according to claim 11, wherein said dental materials comprise a dental glass ionomer.
15. A kit according to claim 11, wherein said dental materials comprise a luting cement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22626794A | 1994-04-11 | 1994-04-11 | |
| US08/226,267 | 1994-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2121219A1 true CA2121219A1 (en) | 1995-10-12 |
Family
ID=22848224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2121219 Abandoned CA2121219A1 (en) | 1994-04-11 | 1994-04-13 | Methods using repositionable instructions and kits containing same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2121219A1 (en) |
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- 1994-04-13 CA CA 2121219 patent/CA2121219A1/en not_active Abandoned
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