CA2526457A1 - Fibrous sheets coated or impregnated with biodegradable polymers or polymers blends - Google Patents
Fibrous sheets coated or impregnated with biodegradable polymers or polymers blends Download PDFInfo
- Publication number
- CA2526457A1 CA2526457A1 CA002526457A CA2526457A CA2526457A1 CA 2526457 A1 CA2526457 A1 CA 2526457A1 CA 002526457 A CA002526457 A CA 002526457A CA 2526457 A CA2526457 A CA 2526457A CA 2526457 A1 CA2526457 A1 CA 2526457A1
- Authority
- CA
- Canada
- Prior art keywords
- article
- manufacture
- fibrous sheet
- thermoplastic
- biodegradable polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract 35
- 239000004621 biodegradable polymer Substances 0.000 title claims abstract 33
- 229920002988 biodegradable polymer Polymers 0.000 title claims abstract 33
- 229920000642 polymer Polymers 0.000 title 1
- 230000009477 glass transition Effects 0.000 claims abstract 16
- 239000007788 liquid Substances 0.000 claims abstract 6
- 239000011256 inorganic filler Substances 0.000 claims abstract 5
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract 5
- 239000011248 coating agent Substances 0.000 claims abstract 3
- 238000000576 coating method Methods 0.000 claims abstract 3
- 238000004519 manufacturing process Methods 0.000 claims 42
- 229920001169 thermoplastic Polymers 0.000 claims 34
- 239000004416 thermosoftening plastic Substances 0.000 claims 34
- 238000000034 method Methods 0.000 claims 13
- 239000000123 paper Substances 0.000 claims 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 7
- 239000000945 filler Substances 0.000 claims 6
- -1 polyethylene terephthalate Polymers 0.000 claims 6
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims 4
- 239000000919 ceramic Substances 0.000 claims 3
- 239000004927 clay Substances 0.000 claims 3
- 239000000155 melt Substances 0.000 claims 3
- 239000011087 paperboard Substances 0.000 claims 3
- 239000000377 silicon dioxide Substances 0.000 claims 3
- 229920001634 Copolyester Polymers 0.000 claims 2
- 229920000331 Polyhydroxybutyrate Polymers 0.000 claims 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims 2
- 125000001931 aliphatic group Chemical group 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims 2
- 229910052570 clay Inorganic materials 0.000 claims 2
- 238000001125 extrusion Methods 0.000 claims 2
- 230000009969 flowable effect Effects 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 2
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 claims 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims 2
- 239000001095 magnesium carbonate Substances 0.000 claims 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims 2
- 239000010445 mica Substances 0.000 claims 2
- 229910052618 mica group Inorganic materials 0.000 claims 2
- 239000005015 poly(hydroxybutyrate) Substances 0.000 claims 2
- 229920000747 poly(lactic acid) Polymers 0.000 claims 2
- 229920006149 polyester-amide block copolymer Polymers 0.000 claims 2
- 239000004626 polylactic acid Substances 0.000 claims 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims 2
- 239000000454 talc Substances 0.000 claims 2
- 229910052623 talc Inorganic materials 0.000 claims 2
- RKDVKSZUMVYZHH-UHFFFAOYSA-N 1,4-dioxane-2,5-dione Chemical compound O=C1COC(=O)CO1 RKDVKSZUMVYZHH-UHFFFAOYSA-N 0.000 claims 1
- 239000005995 Aluminium silicate Substances 0.000 claims 1
- 235000019738 Limestone Nutrition 0.000 claims 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical group OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims 1
- 229920008262 Thermoplastic starch Polymers 0.000 claims 1
- 239000001361 adipic acid Substances 0.000 claims 1
- 235000011037 adipic acid Nutrition 0.000 claims 1
- 239000004964 aerogel Substances 0.000 claims 1
- 229920003232 aliphatic polyester Polymers 0.000 claims 1
- 235000012211 aluminium silicate Nutrition 0.000 claims 1
- 150000001413 amino acids Chemical class 0.000 claims 1
- 125000003118 aryl group Chemical group 0.000 claims 1
- 229910001570 bauxite Inorganic materials 0.000 claims 1
- 239000011324 bead Substances 0.000 claims 1
- 238000007664 blowing Methods 0.000 claims 1
- 239000000378 calcium silicate Substances 0.000 claims 1
- 229910052918 calcium silicate Inorganic materials 0.000 claims 1
- UGGQKDBXXFIWJD-UHFFFAOYSA-N calcium;dihydroxy(oxo)silane;hydrate Chemical compound O.[Ca].O[Si](O)=O UGGQKDBXXFIWJD-UHFFFAOYSA-N 0.000 claims 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 claims 1
- 238000005266 casting Methods 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 claims 1
- 150000002009 diols Chemical class 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 239000010438 granite Substances 0.000 claims 1
- 239000010440 gypsum Substances 0.000 claims 1
- 229910052602 gypsum Inorganic materials 0.000 claims 1
- 150000001261 hydroxy acids Chemical class 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 239000006028 limestone Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000004005 microsphere Substances 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 239000010451 perlite Substances 0.000 claims 1
- 235000019362 perlite Nutrition 0.000 claims 1
- 229920002961 polybutylene succinate Polymers 0.000 claims 1
- 239000004631 polybutylene succinate Substances 0.000 claims 1
- 229920009537 polybutylene succinate adipate Polymers 0.000 claims 1
- 239000004630 polybutylene succinate adipate Substances 0.000 claims 1
- 229920001610 polycaprolactone Polymers 0.000 claims 1
- 239000004632 polycaprolactone Substances 0.000 claims 1
- 229920000728 polyester Polymers 0.000 claims 1
- 229920000139 polyethylene terephthalate Polymers 0.000 claims 1
- 239000005020 polyethylene terephthalate Substances 0.000 claims 1
- 239000008262 pumice Substances 0.000 claims 1
- 238000009877 rendering Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000004576 sand Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 239000004628 starch-based polymer Substances 0.000 claims 1
- 239000001384 succinic acid Substances 0.000 claims 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims 1
- 229920001897 terpolymer Polymers 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 239000010455 vermiculite Substances 0.000 claims 1
- 229910052902 vermiculite Inorganic materials 0.000 claims 1
- 235000019354 vermiculite Nutrition 0.000 claims 1
- 239000010457 zeolite Substances 0.000 claims 1
- 150000003755 zirconium compounds Chemical class 0.000 claims 1
- 229920001222 biopolymer Polymers 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
-
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
-
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- B32B27/00—Layered products comprising a layer of synthetic resin
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- B32B29/00—Layered products comprising a layer of paper or cardboard
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31725—Of polyamide
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2164—Coating or impregnation specified as water repellent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2213—Coating or impregnation is specified as weather proof, water vapor resistant, or moisture resistant
Abstract
Fibrous sheets are coated or impregnated with a biodegradable composition to render the sheets more resistant to penetration by liquids. Biodegradable polymer blends suitable for use in coating or impregnating a fibrous sheet can be manufactured from at least one "hard" biodegradable polymer and at least one "soft" biodegradable polymer. "Hard" biopolymers typically have a glass transition temperature of at least about 10~C. "Soft" biodegradable polymers typically have a glass transition temperature less than about 0~C. Another useful biodegradable polymer composition includes one or more biodegradable polymers and sufficient inorganic filler so as to render the treated sheet microwaveable. The biodegradable polymer compositions are especially well-suited for coating or impregnating paper sheets, e.g., 12-15 lb/3000 ft2 tissue paper to yield food wraps. Food wraps will typically be manufactured to have good "dead-fold" properties so as to remain in a wrapped position and not spring back to an "unwrapped" form.
Claims (51)
1. An article of manufacture comprising:
a fibrous sheet, at least a portion of the fibrous sheet being coated or impregnated with a biodegradable composition that renders the fibrous sheet more resistant to liquids, the biodegradable composition comprising:
at least one soft thermoplastic biodegradable polymer having a glass transition temperature less than about 0°C.; and at least one stiff thermoplastic biodegradable polymer having a glass transition temperature of at least about 10°C.
a fibrous sheet, at least a portion of the fibrous sheet being coated or impregnated with a biodegradable composition that renders the fibrous sheet more resistant to liquids, the biodegradable composition comprising:
at least one soft thermoplastic biodegradable polymer having a glass transition temperature less than about 0°C.; and at least one stiff thermoplastic biodegradable polymer having a glass transition temperature of at least about 10°C.
2. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer comprises a modified polyethylene terephthalate in which a portion of the terephthalate groups are substituted with at least one aliphatic diacid.
3. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer comprises at least one of a polyesteramide, a polyhydroxybutyrate having a glass transition temperature of at least about 10°C., a terpolymer including units formed from glycolide, lactide and s-caprolactone, or a polyesteramide formed from at least one diacid, at least one diol, and at least one amino acid.
4. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer comprises at least one of a polylactic acid or a polylactic acid derivative.
5. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer comprises at least one of an aliphatic polyester including units formed from at least one of a lactide or a hydroxyacid having at least 4 carbon atoms, a polyester including units formed from succinic acid and an aliphatic diol, and at least one aliphatic diol, polycaprolactone, polyhydroxybutyrate-hydroxyvalerate copolymer, polybutylene succinate, polybutylene succinate adipate, polyethylene succinate, or thermoplastic starch.
6. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer comprises at least one of an aliphatic-aromatic copolyester including units formed from an aliphatic diol, an aliphatic diacid and an aromatic diacid or an aliphatic-aromatic copolyester including units formed from adipic acid, dialkyl terephthalate, and at least one aliphatic diol.
7. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer is included in a range of about 20% to about 99%
by weight of the biodegradable composition.
by weight of the biodegradable composition.
8. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer is included in a concentration of at least about 40%
by weight of the biodegradable composition.
by weight of the biodegradable composition.
9. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer is included in a concentration of at least, but not including, 50% by weight of the biodegradable composition.
10. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer has a glass transition temperature of at least about 15°C.
11. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer has a glass transition temperature of at least about 25°C.
12. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer has a glass transition temperature of at least about 35°C.
13. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer is included in a concentration up to about 70% by weight of the biodegradable composition.
14. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer is included in a concentration up to, but not including, 50% by weight of the biodegradable composition.
15. An article of manufacture as defined in claim 1, wherein the stiff thermoplastic biodegradable polymer is included in a concentration up to about 45% by weight of the biodegradable composition.
16. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer has a glass transition temperature less than about -4°C.
17. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer has a glass transition temperature less than about -10°C.
18. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer has a glass transition temperature less than about -20°C.
19. An article of manufacture as defined in claim 1, wherein the soft thermoplastic biodegradable polymer has a glass transition temperature less than about -30°C.
20. An article of manufacture as defined in claim 1, the biodegradable composition further comprising at least one particulate filler.
21. An article of manufacture as defined in claim 20, the particulate filler being included in an amount so as to render the article of manufacture microwaveable.
22. An article of manufacture as defined in claim 20, the particulate filler being included in an amount of at least about 10% by weight of the biodegradable composition.
23. An article of manufacture as defined in claim 20, the particulate filler being included in an amount of at least about 20% by weight of the biodegradable composition.
24. An article of manufacture as defined in claim 20, the particulate filler being included in an amount of at least about 30% by weight of the biodegradable composition.
25. An article of manufacture as defined in claim 20, the particulate filler comprising at least one of silica, calcium carbonate, clay, talc, mica, alumina, or ceramic.
26. An article of manufacture as defined in claim 1, the biodegradable composition comprising a film or sheet that has been laminated to at least one side of the fibrous sheet.
27. An article of manufacture as defined in claim 1, the fibrous sheet comprising tissue paper, paper or paperboard.
28. An article of manufacture as defined in claim 1, the fibrous sheet comprising 8-60 1b/3000 ft2 paper prior to being coated or impregnated with the biodegradable composition.
29. An article of manufacture as defined in claim 1, the fibrous sheet comprising 12-15 1b/3000 ft2 tissue paper prior to being coated or impregnated with the biodegradable composition.
30. An article of manufacture comprising:
a fibrous sheet, at least a portion of the fibrous sheet being coated or impregnated with a biodegradable composition that renders the fibrous sheet more resistant to liquids, the biodegradable composition comprising at least one type of polyhydroxybutyrate.
a fibrous sheet, at least a portion of the fibrous sheet being coated or impregnated with a biodegradable composition that renders the fibrous sheet more resistant to liquids, the biodegradable composition comprising at least one type of polyhydroxybutyrate.
31. An article of manufacture as defined in claim 30, the fibrous sheet comprising tissue paper, paper or paperboard.
32. An article of manufacture as defined in claim 30, the fibrous sheet comprising 12-15 1b/3000 ft2 tissue paper.
33. An article of manufacture as defined in claim 30, the biodegradable composition comprising at least about 30% by weight of an inorganic filler.
34. An article of manufacture as defined in claim 33, the inorganic filler comprising at least one of silica, sand, crushed rock, bauxite, granite, limestone, sandstone, glass beads, aerogel, xerogel, mica, clay, alumina, kaolin, microspheres, hollow glass spheres, porous ceramic spheres, gypsum, insoluble salts, calcium carbonate, magnesium carbonate, calcium aluminate, magnesium carbonate, titanium dioxide, talc, ceramic, zirconium compounds, xonotlite (a crystalline calcium silicate gel), lightweight expanded clay, perlite, vermiculite, pumice, zeolites, minerals, or other geologic material.
35. An article of manufacture comprising:
a fibrous sheet, at least a portion of the fibrous sheet being coated or impregnated with a biodegradable composition that renders the fibrous sheet more resistant to liquids, the biodegradable composition comprising:
at least biodegradable polymer; and at least one inorganic filler included in a concentration of at least about 30% by weight of the biodegradable composition.
a fibrous sheet, at least a portion of the fibrous sheet being coated or impregnated with a biodegradable composition that renders the fibrous sheet more resistant to liquids, the biodegradable composition comprising:
at least biodegradable polymer; and at least one inorganic filler included in a concentration of at least about 30% by weight of the biodegradable composition.
36. An article of manufacture as defined in claim 35, wherein the biodegradable composition comprises at least one soft biodegradable polymer having a glass transition temperature less than about 0° C.
37. An article of manufacture as defined in claim 36, wherein the biodegradable composition further comprises at least one stiff biodegradable polymer having a glass transition temperature of at least about 10° C
38. An article of manufacture as defined in claim 36, wherein the biodegradable composition comprises silica as the inorganic filler.
39. An article of manufacture as defined in claim 38, wherein the article of manufacture is microwaveable.
40. An article of manufacture as defined in claim 35, the fibrous sheet comprising 12-15 lb/3000 ft2 tissue paper.
41. A method of rendering a fibrous sheet more resistant to liquids, comprising:
providing a fibrous sheet; and coating or impregnating the fibrous sheet with a biodegradable composition in order to render the fibrous sheet more resistant to liquids, the thermoplastic biodegradable composition comprising:
at least one soft thermoplastic biodegradable polymer having a glass transition temperature less than about 0°C.; and at least one stiff thermoplastic biodegradable polymer having a glass transition temperature of at least about 10°C.
providing a fibrous sheet; and coating or impregnating the fibrous sheet with a biodegradable composition in order to render the fibrous sheet more resistant to liquids, the thermoplastic biodegradable composition comprising:
at least one soft thermoplastic biodegradable polymer having a glass transition temperature less than about 0°C.; and at least one stiff thermoplastic biodegradable polymer having a glass transition temperature of at least about 10°C.
42. A method as defined in claim 41, the method comprising:
heating the thermoplastic biodegradable composition so as to form a thermoplastic melt comprising an initially flowable composition;
applying the thermoplastic melt to at least one side of the fibrous sheet so as to coat or impregnate the fibrous sheet; and allowing the thermoplastic melt to harden.
heating the thermoplastic biodegradable composition so as to form a thermoplastic melt comprising an initially flowable composition;
applying the thermoplastic melt to at least one side of the fibrous sheet so as to coat or impregnate the fibrous sheet; and allowing the thermoplastic melt to harden.
43. A method as defined in claim 42, wherein the thermoplastic melt is applied to the at least one side of the fibrous sheet using a doctor blade or by spraying.
44. A method as defined in claim 43, wherein the thermoplastic melt has a melt flow index of at least about 40 g/10 min.
45. A method as defined in claim 43, wherein the thermoplastic melt has a melt flow index of at least about 70 g/10 min.
46. A method as defined in claim 43, wherein the thermoplastic melt has a melt flow index of at least about 100 g/10 min.
47. A method as defined in claim 41, the method comprising:
heating the thermoplastic biodegradable composition so as to form a thermoplastic melt comprising an initially flowable composition;
forming a sheet or film from the thermoplastic melt; and laminating the sheet or film to at least one side of the fibrous sheet.
heating the thermoplastic biodegradable composition so as to form a thermoplastic melt comprising an initially flowable composition;
forming a sheet or film from the thermoplastic melt; and laminating the sheet or film to at least one side of the fibrous sheet.
48. A method as defined in claim 47, wherein the sheet or film is formed by at least one of casting, extrusion or blowing.
49. A method as defined in claim 48, wherein the sheet or film is laminated to the fibrous sheet by co-extrusion.
50. A method as defined in claim 41, the fibrous sheet comprising tissue paper, paper or paperboard.
51. A method as defined in claim 50, the fibrous sheet comprising 12-15 1b/3000 ft2 tissue paper.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/453,318 US7172814B2 (en) | 2003-06-03 | 2003-06-03 | Fibrous sheets coated or impregnated with biodegradable polymers or polymers blends |
US10/453,318 | 2003-06-03 | ||
PCT/IB2004/002164 WO2004106630A2 (en) | 2003-06-03 | 2004-06-02 | Fibrous sheets coated or impregnated with biodegradable polymers or polymers blends |
Publications (2)
Publication Number | Publication Date |
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CA2526457A1 true CA2526457A1 (en) | 2004-12-09 |
CA2526457C CA2526457C (en) | 2010-03-30 |
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CA2526457A Expired - Fee Related CA2526457C (en) | 2003-06-03 | 2004-06-02 | Fibrous sheets coated or impregnated with biodegradable polymers or polymers blends |
Country Status (11)
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US (2) | US7172814B2 (en) |
EP (2) | EP2353862A3 (en) |
JP (2) | JP4809215B2 (en) |
CN (1) | CN1826222A (en) |
AU (1) | AU2004243688B2 (en) |
CA (1) | CA2526457C (en) |
CY (1) | CY1115281T1 (en) |
DK (1) | DK1660323T4 (en) |
ES (1) | ES2450137T5 (en) |
PT (1) | PT1660323E (en) |
WO (1) | WO2004106630A2 (en) |
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ES2450137T5 (en) | 2017-08-09 |
AU2004243688B2 (en) | 2010-05-20 |
JP4809215B2 (en) | 2011-11-09 |
CA2526457C (en) | 2010-03-30 |
ES2450137T3 (en) | 2014-03-24 |
JP2006526713A (en) | 2006-11-24 |
DK1660323T3 (en) | 2014-03-03 |
EP2353862A2 (en) | 2011-08-10 |
JP2009234266A (en) | 2009-10-15 |
WO2004106630A2 (en) | 2004-12-09 |
US20060240726A1 (en) | 2006-10-26 |
PT1660323E (en) | 2014-03-10 |
DK1660323T4 (en) | 2017-07-03 |
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US7344784B2 (en) | 2008-03-18 |
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