JPH03237143A - Method for recovering and regenerating multilayer film - Google Patents
Method for recovering and regenerating multilayer filmInfo
- Publication number
- JPH03237143A JPH03237143A JP2032525A JP3252590A JPH03237143A JP H03237143 A JPH03237143 A JP H03237143A JP 2032525 A JP2032525 A JP 2032525A JP 3252590 A JP3252590 A JP 3252590A JP H03237143 A JPH03237143 A JP H03237143A
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- layer
- nylon
- molecular weight
- multilayer film
- 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
- 238000000034 method Methods 0.000 title claims description 10
- 230000001172 regenerating effect Effects 0.000 title 1
- -1 polyethylene Polymers 0.000 claims abstract description 23
- 239000004698 Polyethylene Substances 0.000 claims abstract description 22
- 229920000573 polyethylene Polymers 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 21
- 239000004677 Nylon Substances 0.000 claims abstract description 13
- 229920001778 nylon Polymers 0.000 claims abstract description 13
- 239000012790 adhesive layer Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims description 4
- 229920001684 low density polyethylene Polymers 0.000 abstract description 7
- 239000004702 low-density polyethylene Substances 0.000 abstract description 7
- 229920002292 Nylon 6 Polymers 0.000 description 8
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 5
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 229920000092 linear low density polyethylene Polymers 0.000 description 3
- 239000004707 linear low-density polyethylene Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000001530 fumaric acid Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- POLXJVCOZBCBEM-UHFFFAOYSA-N C(C=C)(=O)OCC1CO1.C(C(=C)C)(=O)OC.C=C Chemical compound C(C=C)(=O)OCC1CO1.C(C(=C)C)(=O)OC.C=C POLXJVCOZBCBEM-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ポリエチレン層、接着層、ナイロン層からな
る透明多層フィルムのスクラップを回収再生する方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for collecting and recycling scraps of a transparent multilayer film consisting of a polyethylene layer, an adhesive layer, and a nylon layer.
（従来の技術）
ポリエチレン層、接着層、ナイロン層からなる透明多層
フィルムは、特徴ある物性を備えている。(Prior Art) A transparent multilayer film consisting of a polyethylene layer, an adhesive layer, and a nylon layer has unique physical properties.
従来より、この多層フィルムのスクラップを回収再生し
ようという試みはされていたが、ポリエチレンとナイロ
ンは相溶性が悪く、不均一な相分離を生しやすく、著し
く外観を損ねるとともに、透明性についても、実用可能
なものが得られず、スクラ・７ブの回収再生というもの
は、全くされていないのが実情であった。Previous attempts have been made to collect and recycle scraps of this multilayer film, but polyethylene and nylon have poor compatibility and are prone to uneven phase separation, which significantly impairs the appearance and reduces transparency. The reality is that no practical product has been obtained, and no efforts have been made to collect and recycle scrubbers.
（発明が解決しようとする課題）
本発明は、ポリエチレン層、接着層、ナイロン層からな
る透明多層フィルムのスクラップに低分子量ポリエチレ
ンを配合することにより、相溶性が著しく改善され、透
明性、外観に優れ、回収再生を可能にすることを目的と
するものである。(Problems to be Solved by the Invention) The present invention achieves a remarkable improvement in compatibility and improved transparency and appearance by blending low molecular weight polyethylene into scraps of a transparent multilayer film consisting of a polyethylene layer, an adhesive layer, and a nylon layer. The purpose is to make recovery and regeneration possible.
（課題を解決するための手段）
本発明は、ポリエチレン層、接着層、ナイロン層からな
る透明多層フィルムのスクラップに低分子量ポリエチレ
ンを添加することを特徴とする多層フィルムの回収再生
方法に関するものである。(Means for Solving the Problems) The present invention relates to a method for collecting and recycling multilayer films characterized by adding low molecular weight polyethylene to scraps of transparent multilayer films consisting of a polyethylene layer, an adhesive layer, and a nylon layer. .
本発明に用いられる透明多層フィルムは、ポリエチレン
層、接着層、ナイロン層からなる。ボリエチレン層とし
ては、平均分子量が２００００以上の高密度ポリエチレ
ン、中密度ポリエチレン、低密度ポリエチレン、超低密
度ポリエチレン、直鎖低密度ポリエチレン、エチレン−
α−オレフィン共重合体、エチレン−プロピレン共重合
体、エチレン−酢酸ビニル共重合体、及びこれらの変性
物、例えばアクリル酸や無水マレイン酸等を化学的に結
合させて得られるものを単独又は２種以上ブレンドして
用いることができる。The transparent multilayer film used in the present invention consists of a polyethylene layer, an adhesive layer, and a nylon layer. The polyethylene layer includes high-density polyethylene with an average molecular weight of 20,000 or more, medium-density polyethylene, low-density polyethylene, ultra-low-density polyethylene, linear low-density polyethylene, ethylene-
α-olefin copolymers, ethylene-propylene copolymers, ethylene-vinyl acetate copolymers, and modified products of these, such as those obtained by chemically bonding acrylic acid, maleic anhydride, etc., singly or in combination. It can be used by blending more than one species.
またこれらは単層及び多層としても使用できる。They can also be used as single layer or multilayer.
接着層としては、高密度ポリエチレン、中密度ポリエチ
レン、低密度ポリエチレン、直鎖低密度ポリエチレン、
エチレン−α−オレフィン共重合体、エチレン−プロピ
レン共重合体、エチレン−酢酸ビニル共重合体、ポリプ
ロピレン等の樹脂にアクリル酸、メタクリル酸なとの一
塩基性不飽和脂肪酸又はマレイン酸、フマル酸、イタコ
ン酸なとの二塩基性不飽和脂肪酸、更にはこれらの無水
物を化学的に結合して得られるもの、酢酸ビニル含量１
５％以上のエチレン−酢酸ビニル共重合体、エチレン−
無水マレイン酸共重合体、エチレンメチルメタクリレー
ト−グリシジルアクリレート３元共重合体を単独又は２
種以上ブレンドして用いることができる。As adhesive layer, high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene,
Monobasic unsaturated fatty acids such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, Dibasic unsaturated fatty acids such as itaconic acid, and those obtained by chemically combining these anhydrides, vinyl acetate content 1
5% or more ethylene-vinyl acetate copolymer, ethylene-
Maleic anhydride copolymer, ethylene methyl methacrylate-glycidyl acrylate terpolymer alone or two
It can be used by blending more than one species.
ナイロン層としては、ナイロン−６、ナイロン１１、ナ
イロン−１２などのポリラクタム類、ナイロン−６，６
、ナイロン−６、１０，ナイロン−６，１２などのジカ
ルボン酸とジアミンとから得られるポリアミド類、ナイ
ロン−６／６．６、ナイロン−６／６．１０、ナイロン
−６／６．１１．ナイロン−６／６．１２、ナイロン−
６７６６／６，１０ 、ナイロン−６／６．６／６，１
２ 、ナイロン６７６Ｔ（Ｔ；テレフタル酸成分）など
の共重合ボリアごド類、またこれらの混合物などの高ア
ミノ末端ポリアミドが挙げられる。As the nylon layer, polylactams such as nylon-6, nylon-11, nylon-12, nylon-6, 6
, polyamides obtained from dicarboxylic acids and diamines such as nylon-6, 10, nylon-6, 12, nylon-6/6.6, nylon-6/6.10, nylon-6/6.11. Nylon-6/6.12, Nylon-
6766/6,10, nylon-6/6.6/6,1
2, copolymerized polyamides such as nylon 676T (T; terephthalic acid component), and high amino-terminated polyamides such as mixtures thereof.
これらは、単層及び多層としても使用できる。They can also be used as single layer and multilayer.
また、本発明に用いられる低分子量ポリエチレンとして
は、平均分子量が１００００以下のポリエチレンオリゴ
マー及びこれらの変性物、例えばマレイン酸、フマル酸
、カルボン酸、更には、これらの無水物を化学的に結合
して得られるものが挙げられる。中でも、分子量が１０
００〜３０００低密度ポリエチレンの無水マレイン酸変
性物が特に好ましい。Furthermore, the low molecular weight polyethylene used in the present invention includes polyethylene oligomers having an average molecular weight of 10,000 or less and modified products thereof, such as maleic acid, fumaric acid, carboxylic acid, and further, chemically bonded anhydrides thereof. Examples include those obtained by Among them, the molecular weight is 10
Particularly preferred are maleic anhydride modified products of low density polyethylene having a density of 00 to 3000.
本発明の多層フィルムの回収再生方法としては透明多層
フィルムのスクラップを粉砕機あるいは、造粒機によっ
て、粒状にしたものに、低分子量ポリエチレンをブレン
ドし、共押出法等公知の方法でフィルムにすることがで
きる。The method for collecting and recycling the multilayer film of the present invention involves pulverizing the scraps of the transparent multilayer film into granules using a crusher or granulator, blending them with low molecular weight polyethylene, and forming the film into a film using a known method such as coextrusion. be able to.
また、混練の際、Ｌ／Ｄが２５以上の２軸押出機を使用
すると、混線が十分であり、より効果的である。In addition, when kneading is performed using a twin-screw extruder with an L/D of 25 or more, mixing is sufficient and it is more effective.
（実施例）
以下実施例により本発明を説明するが、これは単なる例
示であり、本発明はこれに限定されるものではない、な
お、実施例では透明多層フィルムのスクラップとしてポ
リエチレン層として直鎖低密度ポリエチレン６０μｍ、
接着層としては直鎖低密度ポリエチレンを無水マレイン
酸変性したもの１０μｍ、ナイロン層としては、ナイロ
ン−６／６，６３０μｍの共押出フィルムを造粒機でペ
レット化したものを使用した。(Example) The present invention will be described below with reference to Examples, but these are merely illustrative and the present invention is not limited thereto. Low density polyethylene 60μm,
The adhesive layer used was linear low-density polyethylene modified with maleic anhydride to a thickness of 10 μm, and the nylon layer used was a coextruded film of nylon-6/6, 630 μm pelletized using a granulator.
実施例１〜３
共押出フィルムを造粒機でペレット化したものに分子量
が２０００の低密度ポリエチレンを無水マレイン酸変性
したものを、５．１０．２０重量部加え、Ｌ／Ｄ４０の
２軸押出機で混練後、Ｔダイ法でフィルムを製造した。Examples 1 to 3 5.10.20 parts by weight of low density polyethylene modified with maleic anhydride with a molecular weight of 2000 was added to the coextruded film pelletized using a granulator, and the mixture was subjected to twin-screw extrusion at L/D 40. After kneading in a machine, a film was produced by a T-die method.
（１００μｍ）
実施例４〜６
共押出フィルムを造粒機でペレット化したものに、分子
量が２８００の低密度ポリエチレンを無水マレイン酸変
性したものを、５．１０．２０重量部加え、Ｌ／Ｄ４０
の２軸押出機で混練後、Ｔダイ法でフィルムを製造した
。 （１００μｍ）
比較例１
共押出フィルムを造粒機でペレット化したものをＬ／Ｄ
４０の２軸押出機で混練後、Ｔダイ法でフィルムを製造
した。 （１００μｍ）
これらの結果を第１表に示す。(100 μm) Examples 4 to 6 5.10.20 parts by weight of low density polyethylene modified with maleic anhydride having a molecular weight of 2800 was added to the coextruded film pelletized using a granulator, and L/D40 was added.
After kneading with a twin-screw extruder, a film was produced using a T-die method. (100 μm) Comparative Example 1 Coextruded film was pelletized using a granulator and L/D
After kneading using a No. 40 twin-screw extruder, a film was produced using a T-die method. (100 μm) These results are shown in Table 1.
光線透過率及びＨＡＺＥは、ＡＳＴＭ−０１００３によ
り測定した結果である。The light transmittance and HAZE are the results measured according to ASTM-01003.
外観については、目視にて、以下の基準により判定した
。The appearance was visually judged according to the following criteria.
○；均一かつ良好な相溶性を示し、相分離異物が見られ
ない。○: Uniform and good compatibility is shown, and no phase-separated foreign matter is observed.
Δ；相溶性は良好であるが、一部に相分離異物が見られ
る。Δ: Good compatibility, but some phase-separated foreign substances are observed.
×；相溶性が悪く、相分離している。×: Poor compatibility and phase separation.
（発明の効果）
本発明方法に従うと、従来回収再生が不可能であったポ
リエチレン層、接着層、ナイロン層からなる透明多層フ
ィルムのスクラップの回収再生が容易に行え、スクラッ
プの廃棄が不用になるとともに、コストダウンにもなる
。(Effects of the Invention) According to the method of the present invention, scraps of transparent multilayer films consisting of polyethylene layers, adhesive layers, and nylon layers, which were conventionally impossible to collect and recycle, can be easily collected and recycled, and there is no need to dispose of scraps. At the same time, it also reduces costs.
Claims (1)
透明多層フィルムのスクラップに低分子量ポリエチレン
を配合することを特徴とする多層フィルムの回収再生方
法。(1) A method for collecting and recycling a multilayer film, which comprises blending low molecular weight polyethylene into scraps of a transparent multilayer film consisting of a polyethylene layer, an adhesive layer, and a nylon layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3252590A JP2857205B2 (en) | 1990-02-15 | 1990-02-15 | Collection and reproduction method of multilayer film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3252590A JP2857205B2 (en) | 1990-02-15 | 1990-02-15 | Collection and reproduction method of multilayer film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03237143A true JPH03237143A (en) | 1991-10-23 |
| JP2857205B2 JP2857205B2 (en) | 1999-02-17 |
Family
ID=12361375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3252590A Expired - Fee Related JP2857205B2 (en) | 1990-02-15 | 1990-02-15 | Collection and reproduction method of multilayer film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2857205B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0622182A2 (en) * | 1993-04-30 | 1994-11-02 | Wolff Walsrode Aktiengesellschaft | Deep-drawable, sealable multilayered foil comprising polyamide and polyolefin, containing a high proportion of recycled material |
| EP0622183A3 (en) * | 1993-04-30 | 1994-11-30 | Wolff Walsrode Ag | |
| FR2740381A1 (en) * | 1995-10-27 | 1997-04-30 | Atochem Elf Sa | Polymer mixtures with polyolefin matrix and a dispersed phase of polyamide alloy |
| US6117561A (en) * | 1995-10-27 | 2000-09-12 | Elf Atochem S.A. | Mixture of polyolefin and of polyamide alloy and method for producing it |
| KR20010010071A (en) * | 1999-07-15 | 2001-02-05 | 정몽규 | Preparation of heat-resistant nylon compound from plastic rocker cover waste |
| EP2030749A2 (en) * | 2007-08-31 | 2009-03-04 | ISR Interseroh Rohstoffe GmbH | Method for manufacturing spun fibres and staple fibres from compound film pieces |
| JP2019196429A (en) * | 2018-05-08 | 2019-11-14 | 株式会社Ｍｓｃ | Regeneration process of composite film |
| WO2022124229A1 (en) | 2020-12-11 | 2022-06-16 | 東洋製罐株式会社 | Sealant film |
-
1990
- 1990-02-15 JP JP3252590A patent/JP2857205B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0622182A2 (en) * | 1993-04-30 | 1994-11-02 | Wolff Walsrode Aktiengesellschaft | Deep-drawable, sealable multilayered foil comprising polyamide and polyolefin, containing a high proportion of recycled material |
| JPH06320688A (en) * | 1993-04-30 | 1994-11-22 | Wolff Walsrode Ag | Deep drawing sealable reused multi-layer film containing polyamide and polyolefin as base and high content of reused material |
| EP0622182A3 (en) * | 1993-04-30 | 1994-11-30 | Wolff Walsrode Ag | |
| EP0622183A3 (en) * | 1993-04-30 | 1994-11-30 | Wolff Walsrode Ag | |
| JPH071689A (en) * | 1993-04-30 | 1995-01-06 | Wolff Walsrode Ag | Deep drawable sealable recycling film with 3 layers containing recycling material by high content, of which radical is polyamide and polyolefines |
| FR2740381A1 (en) * | 1995-10-27 | 1997-04-30 | Atochem Elf Sa | Polymer mixtures with polyolefin matrix and a dispersed phase of polyamide alloy |
| US6117561A (en) * | 1995-10-27 | 2000-09-12 | Elf Atochem S.A. | Mixture of polyolefin and of polyamide alloy and method for producing it |
| KR20010010071A (en) * | 1999-07-15 | 2001-02-05 | 정몽규 | Preparation of heat-resistant nylon compound from plastic rocker cover waste |
| EP2030749A2 (en) * | 2007-08-31 | 2009-03-04 | ISR Interseroh Rohstoffe GmbH | Method for manufacturing spun fibres and staple fibres from compound film pieces |
| EP2030749A3 (en) * | 2007-08-31 | 2010-11-10 | ISR Interseroh Rohstoffe GmbH | Method for manufacturing spun fibres and staple fibres from compound film pieces |
| JP2019196429A (en) * | 2018-05-08 | 2019-11-14 | 株式会社Ｍｓｃ | Regeneration process of composite film |
| WO2022124229A1 (en) | 2020-12-11 | 2022-06-16 | 東洋製罐株式会社 | Sealant film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2857205B2 (en) | 1999-02-17 |
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