DE1629772A1 - Process for the production of plastic packaging films - Google Patents
Process for the production of plastic packaging filmsInfo
- Publication number
- DE1629772A1 DE1629772A1 DE19651629772 DE1629772A DE1629772A1 DE 1629772 A1 DE1629772 A1 DE 1629772A1 DE 19651629772 DE19651629772 DE 19651629772 DE 1629772 A DE1629772 A DE 1629772A DE 1629772 A1 DE1629772 A1 DE 1629772A1
- Authority
- DE
- Germany
- Prior art keywords
- films
- production
- foils
- packaging films
- plastic packaging
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000012785 packaging film Substances 0.000 title claims description 4
- 229920006280 packaging film Polymers 0.000 title claims description 4
- 239000004033 plastic Substances 0.000 title description 3
- 229920003023 plastic Polymers 0.000 title description 3
- 239000011888 foil Substances 0.000 claims description 11
- 230000035515 penetration Effects 0.000 claims description 7
- 238000004132 cross linking Methods 0.000 claims description 6
- 239000002985 plastic film Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000006855 networking Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 231100000489 sensitizer Toxicity 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- RELMFMZEBKVZJC-UHFFFAOYSA-N 1,2,3-trichlorobenzene Chemical compound ClC1=CC=CC(Cl)=C1Cl RELMFMZEBKVZJC-UHFFFAOYSA-N 0.000 description 1
- JHBKHLUZVFWLAG-UHFFFAOYSA-N 1,2,4,5-tetrachlorobenzene Chemical compound ClC1=CC(Cl)=C(Cl)C=C1Cl JHBKHLUZVFWLAG-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920006302 stretch film Polymers 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/16—Surface shaping of articles, e.g. embossing; Apparatus therefor by wave energy or particle radiation, e.g. infrared heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/085—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using gamma-ray
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/008—Wide strips, e.g. films, webs
Description
Verfahren zur Herstellung von Kunststoff-Verpackungsfolien Die Erfindung betrifft ein Verfahren z;ur Herstellung von Kunststoff-Verpackungsfolien. Process for the production of plastic packaging films The invention relates to a process for the production of plastic packaging films.
Es ist bekannt, Kunsjstoff-Folien, vorzugsweise Polyolefin-Folien, durchBestrahlen durchgehend zu vernetzen. It is known that plastic films, preferably polyolefin films, to be crosslinked through irradiation.
Die Vernetzung bewirkt dabei u. aO eine wesentliche Erhöhung des Schmelzpunktes, die so weit getrieben werden kann, daß dieser praktisch nicht mehr zu definieren ist. Es ist ferner bekannt, derart bestrahlte Folien zu recken, um ihr Schrumpfvermögen und ihre bleibende Klarheit zu verbestern, Demgegenüber wird mit der Erfindung ein Verfahren vorgeschlagen, das sich dadurch kennzeichnet, daß die Kunststoff-Folien nur einseitig in begrenzter, nicht durchgehender Eindringtiefe vernetzt werden.The crosslinking causes, among other things, a significant increase in the melting point, which can be carried so far that this can no longer be defined in practice is. It is also known to stretch films irradiated in this way in order to reduce their shrinkage capacity and to spoil their lasting clarity, In contrast, the invention makes a A method is proposed which is characterized in that the plastic films can only be networked on one side with a limited, non-continuous penetration depth.
Es wurde gefunden, daß es das erfindungsgemäße Verfahren gestattet, in überraschend einfacher und wirtschaftlicher Weise thermoplastische Kunststoff-Folien, die in groosem Umfang, z. B. für Verpackungszwecke, verwendet werden, mit den Merkmalen von lackierten Folien oder Verbundfolien zu versehen. Durch die einseitige Vernetzung entstehen nämlich Folien, die auf ihrer einen, der Vernetzung unterworfenen Seite einen erhöhten Schmelzpunkt und damit Eigenschaften einer Trägerfolie haben, während auf ihrer anderen Seite die ursprünglichen Eigenschaften, vor allem der niedrige Schmelzpunkt, nahezu ganz erhalten geblieben sind. Dabei läßt sich auf der behandelten Seiteder.Schmelzpunkt so weit heraufsetzen, daß die Folien unter normalen Praxisbedingungen einseitig siegelbar werden. Sie bekommen somit praktisch die Merkmale von lackierten Folien oder Verbundfolien, ohne daß es erforderlich ist, den kostspieligen und aufwendigen Weg der Lakkierung, Kaschierung oder Beschichtung,der bisher in der Verbundfolienherstellung ueblich war, zu beschreiten. It has been found that the method according to the invention allows in a surprisingly simple and economical way thermoplastic plastic films, those in large Scope, e.g. B. for packaging purposes, are used, to be provided with the characteristics of lacquered foils or composite foils. Through the One-sided networking is created namely foils that are based on their one, the networking subject side has an increased melting point and thus properties of a carrier film while on their other side have the original properties, above all the low melting point, have been almost completely preserved. It can be on the treated side of the melting point so far that the foils are below normal practice conditions can be sealed on one side. You thus get practical the characteristics of lacquered foils or composite foils without being required is, the costly and laborious way of painting, lamination or coating that was previously common in the composite film production to tread.
Bevorzugt erfolgt die Vernetzung durch die an siöh bekannte Einwirkung energiereicher Strahlung, Wobei aber deren Intensität so bemessen ist, daß die Folien nur einseitig in begrenzter Eindringtiefe vernetzt werden. Die dafür erforderliche Einstellung läßt sieh empirisch leicht ermitteln, beispielsweise indem man der bestrahlten Oberfläche Schabeproben entnimmt und z.B, deren Schmelzverhalten untersucht. The crosslinking is preferably carried out by the action known to them high-energy radiation, the intensity of which is such that the foils can only be networked on one side with a limited penetration depth. The necessary Setting can be easily determined empirically, for example by looking at the irradiated Surface samples are taken and, for example, their melting behavior is investigated.
Die Eindringtiefe der Vernetzung soll vorzugsweise 50 % der Folienstärke umfassen, kann jedoch auch bis auf 90 % ausgedehnt oder bis auf 10 * beschränkt werden. Es muß lediglich sichergestellt bleiben, daß die Vernetzung nicht die ganze Polienstärke erreicht, sondern daß nur dei Eigenschaften einer Folienseite einseitig verändert werden. The penetration depth of the crosslinking should preferably be 50% of the film thickness but can also be extended to 90% or limited to 10 * will. It just has to be ensured that the networking is not the whole Polish strength achieved, but that only the properties of one side of the film changed on one side will.
Die Vernetzung kann durch UV-Strahlung, aber auch durch Alpha-, Beta-, Gamma- oder Röntgenstrahlung oder durch Neutronenbeschuß vorgenommen werden. Im alle der Verwendung von UV-Strahlung ist es dabei erforderlich, die Folien einseitig mit an sich bekannten Sensibilatoren zu imprägnieren. Der Grad der Vernetzung ist in diesem Fall fast' ausschließlich von der Eindringtiefe der Sensibilatoren abhängig. Als Sensibilatoren sind chlorierte chromate, chlorierte Aliphathe-oder ähnliche organische Verbindungen mit einer oder mehreren Doppelbindungen geeignet. Vorzugsweise wird Tetrachloraethylen, Trichloraethylen und 1,2,4,5-Tetrachlorbenzol, 1,2,3-Trichlorbenzol, 1 2 4-Trichlorbenzol verwendet. The crosslinking can be achieved by UV radiation, but also by alpha, beta, Gamma or X-rays or by neutron bombardment. in the With all the use of UV radiation it is necessary to make the foils one-sided to be impregnated with known sensitizers. The degree of networking is in this case almost 'exclusively dependent on the depth of penetration of the sensitisers. Chlorinated chromates, chlorinated aliphatics or the like are used as sensitizers organic compounds with one or more double bonds are suitable. Preferably becomes tetrachlorethylene, trichlorethylene and 1,2,4,5-tetrachlorobenzene, 1,2,3-trichlorobenzene, 1 2 4-trichlorobenzene used.
Die teilvernetzten Folien, die sich in der vorangehend beschriebenen Weise ergeben, Können ebenso, wie dies für durchgehend vernetzte Folien bekannt ist, durch mono- oder biaxiales Verstrecken in ihren weiteren physikalischen Eigenschaften verbessert werden. Besonders vorteilhaft ist es dabei, verhältnismä#ig dicke Folieneinzusetzen, diese-etwa eur Hälfte zu vernetzen und anschließend biaxial zu verstrecken. The partially crosslinked films, which are in the previously described Wise, can just as well, as is known for continuously crosslinked films is, by mono- or biaxial stretching in its further physical properties be improved. It is particularly advantageous to use relatively thick foils, to cross-link this-about eur half and then to stretch it biaxially.
Beispiele -Eine 500 mü dicke Polyaethylenfolie wird durch Einwirkung von Strahlen von 5 Mrad. bis zu einer Eindringtiefe von 250 mü, also zur Hälfte vernetzt. Anschließend wird die Folie in bekannter Weise auf eine Dicke von 20 mü biaxial verstreckt.Examples - A 500 m thick polyethylene film is exposed to the action of rays of 5 Mrad. up to a penetration depth of 250 m, i.e. half networked. Then the slide becomes known in Way in a Thickness of 20 m biaxially stretched.
Man -erhält auf diese Weise eine Folie, die auf der unbehandelten Seite den ursprünglichen Polyaethylen-Schmelzpunkt von ca. 115 C-aufweist, während die der Bestrahlung unterworfene Seite einen Schmelzpunkt von ca. 1600 zu C zeigt. Die Folie läßt sich daher gut versiegeln und auf den meisten mit Siegelwerkzeugen ausgerüsteten Verpackungsmaschinen verarbeiten. In this way you get a film that is on the untreated Side has the original polyethylene melting point of approx. 115 C, while the side exposed to the irradiation shows a melting point of approx. 1600 to C. The film can therefore be sealed well and on most with sealing tools equipped packaging machines.
- Ansprüche -- Expectations -
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW0039907 | 1965-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1629772A1 true DE1629772A1 (en) | 1971-05-19 |
Family
ID=7602283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19651629772 Pending DE1629772A1 (en) | 1965-09-14 | 1965-09-14 | Process for the production of plastic packaging films |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1629772A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2413973A1 (en) * | 1978-01-05 | 1979-08-03 | Pont A Mousson | Internal crosslinking of tubular extrusion blown polyethylene film - to make shrink wrap packaging film with a non-adhesive internal face |
| EP0004963A1 (en) * | 1978-04-19 | 1979-10-31 | Toray Industries, Inc. | Process for increasing the surface roughness of stretched thermoplastic materials |
| EP0012026A1 (en) * | 1978-11-30 | 1980-06-11 | BICC Public Limited Company | A method of making a heat-sealed food package |
| FR2504846A1 (en) * | 1981-02-06 | 1982-11-05 | Grace W R Ltd | METHOD FOR SEALING AND OPENING PACKAGING IN THERMOPLASTIC FILM AND PACKAGES HAVING EASILY REMOVABLE JOINTS |
| EP0120672A2 (en) * | 1983-03-23 | 1984-10-03 | Toa Nenryo Kogyo Kabushiki Kaisha | Oriented polyethylene film and method of manufacture |
| WO1985003276A1 (en) * | 1984-01-17 | 1985-08-01 | Leha Handelsgesellschaft Mbh. & Co. | Process for producing heat-proof packages |
| EP0189808A2 (en) * | 1985-02-01 | 1986-08-06 | Hoechst Celanese Corporation | Method for producing heat-sealable packaging sheets |
| EP0292676A2 (en) * | 1987-05-25 | 1988-11-30 | kabelmetal electro GmbH | Heat-recoverable article and process for its manufacture |
| US5993922A (en) * | 1996-03-29 | 1999-11-30 | Cryovac, Inc. | Compositions and methods for selectively crosslinking films and improved film articles resulting therefrom |
| WO2002051913A1 (en) * | 2000-12-25 | 2002-07-04 | Syfan Saad (99) Ltd. | Improved process for the manufacture of thermoplastic shrink films |
| WO2011135182A1 (en) * | 2010-04-30 | 2011-11-03 | Stora Enso Oyj | Method for improving the heat sealability of packaging material and method for manufacturing heat-sealed container or package |
-
1965
- 1965-09-14 DE DE19651629772 patent/DE1629772A1/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2413973A1 (en) * | 1978-01-05 | 1979-08-03 | Pont A Mousson | Internal crosslinking of tubular extrusion blown polyethylene film - to make shrink wrap packaging film with a non-adhesive internal face |
| EP0004963A1 (en) * | 1978-04-19 | 1979-10-31 | Toray Industries, Inc. | Process for increasing the surface roughness of stretched thermoplastic materials |
| EP0012026A1 (en) * | 1978-11-30 | 1980-06-11 | BICC Public Limited Company | A method of making a heat-sealed food package |
| FR2504846A1 (en) * | 1981-02-06 | 1982-11-05 | Grace W R Ltd | METHOD FOR SEALING AND OPENING PACKAGING IN THERMOPLASTIC FILM AND PACKAGES HAVING EASILY REMOVABLE JOINTS |
| EP0120672A3 (en) * | 1983-03-23 | 1986-08-06 | Toa Nenryo Kogyo Kabushiki Kaisha | Oriented polyethylene film and method of manufacture |
| EP0120672A2 (en) * | 1983-03-23 | 1984-10-03 | Toa Nenryo Kogyo Kabushiki Kaisha | Oriented polyethylene film and method of manufacture |
| WO1985003276A1 (en) * | 1984-01-17 | 1985-08-01 | Leha Handelsgesellschaft Mbh. & Co. | Process for producing heat-proof packages |
| EP0189808A3 (en) * | 1985-02-01 | 1988-10-12 | Hoechst Celanese Corporation | Method for producing heat-sealable packaging sheets |
| EP0189808A2 (en) * | 1985-02-01 | 1986-08-06 | Hoechst Celanese Corporation | Method for producing heat-sealable packaging sheets |
| EP0292676A2 (en) * | 1987-05-25 | 1988-11-30 | kabelmetal electro GmbH | Heat-recoverable article and process for its manufacture |
| EP0292676A3 (en) * | 1987-05-25 | 1989-10-11 | kabelmetal electro GmbH | Heat-recoverable article and process for its manufacture |
| US5993922A (en) * | 1996-03-29 | 1999-11-30 | Cryovac, Inc. | Compositions and methods for selectively crosslinking films and improved film articles resulting therefrom |
| WO2002051913A1 (en) * | 2000-12-25 | 2002-07-04 | Syfan Saad (99) Ltd. | Improved process for the manufacture of thermoplastic shrink films |
| WO2011135182A1 (en) * | 2010-04-30 | 2011-11-03 | Stora Enso Oyj | Method for improving the heat sealability of packaging material and method for manufacturing heat-sealed container or package |
| US9937681B2 (en) | 2010-04-30 | 2018-04-10 | Stora Enso Oyj | Method for improving the heat sealability of packaging material and method for manufacturing heat-sealed container or package |
| US10857753B2 (en) | 2010-04-30 | 2020-12-08 | Stora Enso Oyj | Method for improving the heat sealability of packaging material and method for manufacturing heat-sealed container or package |
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