JPH04336246A - Decomposable laminated paper - Google Patents
Decomposable laminated paperInfo
- Publication number
- JPH04336246A JPH04336246A JP3107052A JP10705291A JPH04336246A JP H04336246 A JPH04336246 A JP H04336246A JP 3107052 A JP3107052 A JP 3107052A JP 10705291 A JP10705291 A JP 10705291A JP H04336246 A JPH04336246 A JP H04336246A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- acid
- lactic acid
- laminated paper
- 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
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 13
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 claims abstract description 12
- 229920001577 copolymer Polymers 0.000 claims abstract description 10
- 239000004310 lactic acid Substances 0.000 claims abstract description 10
- 235000014655 lactic acid Nutrition 0.000 claims abstract description 10
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 9
- 239000004626 polylactic acid Substances 0.000 claims abstract description 9
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- IWHLYPDWHHPVAA-UHFFFAOYSA-N 6-hydroxyhexanoic acid Chemical compound OCCCCCC(O)=O IWHLYPDWHHPVAA-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229930182843 D-Lactic acid Natural products 0.000 claims abstract description 4
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 claims abstract description 4
- 229940022769 d- lactic acid Drugs 0.000 claims abstract description 4
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 3
- 229920006237 degradable polymer Polymers 0.000 claims description 2
- 239000000123 paper Substances 0.000 abstract description 84
- 229920000642 polymer Polymers 0.000 abstract description 23
- 239000002689 soil Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000002655 kraft paper Substances 0.000 abstract description 3
- 238000010030 laminating Methods 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- 229920006254 polymer film Polymers 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 229920001432 poly(L-lactide) Polymers 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 2
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical compound OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 description 2
- 229940006015 4-hydroxybutyric acid Drugs 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920006381 polylactic acid film Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000009816 wet lamination Methods 0.000 description 2
- RKDVKSZUMVYZHH-UHFFFAOYSA-N 1,4-dioxane-2,5-dione Chemical compound O=C1COC(=O)CO1 RKDVKSZUMVYZHH-UHFFFAOYSA-N 0.000 description 1
- JRHWHSJDIILJAT-UHFFFAOYSA-N 2-hydroxypentanoic acid Chemical compound CCCC(O)C(O)=O JRHWHSJDIILJAT-UHFFFAOYSA-N 0.000 description 1
- PHOJOSOUIAQEDH-UHFFFAOYSA-N 5-hydroxypentanoic acid Chemical compound OCCCCC(O)=O PHOJOSOUIAQEDH-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 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
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は自然環境下での分解性を
持った熱可塑性ポリマー組成物と、紙とのラミネート紙
に関するものである。さらに詳しくは、ポリ乳酸または
乳酸とオキシカルボン酸のコポリマーを主成分とするポ
リマーと紙からなる、防湿用包装紙、化粧紙、牛乳やジ
ュースの容器等に用いることができ、自然環境下で分解
し、またパルプの回収も容易なラミネート紙に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated paper made of paper and a thermoplastic polymer composition that is degradable in a natural environment. More specifically, it is made of paper and a polymer whose main component is polylactic acid or a copolymer of lactic acid and oxycarboxylic acid, and can be used for moisture-proof wrapping paper, decorative paper, milk and juice containers, etc., and decomposes in the natural environment. The present invention also relates to laminated paper whose pulp can be easily recovered.
【０００２】0002
【従来の技術】近年、賞品の美観、衛生、荷作り輸送の
問題から、包装用プラスチックの使用量が増加している
。これにともない、家庭や工場から廃棄されるゴミの量
も急増しており大都市周辺では埋設する土地の不足が深
刻な問題になっている。BACKGROUND OF THE INVENTION In recent years, the amount of packaging plastic used has increased due to problems with the aesthetics, hygiene, and packaging and transportation of prizes. Along with this, the amount of garbage being discarded from households and factories is rapidly increasing, and the lack of land to bury the garbage has become a serious problem in areas surrounding major cities.
【０００３】紙は、自然環境中での分解性を持ち、埋設
されても長期間の間に分解される。また、焼却しても有
害なガスを発生しないため、分解性の低いプラスチック
に代わり、使い捨て用の包装紙、容器などに利用される
ようになった。また、これらの紙容器なども森林資源の
保護の立場から、回収して再利用する傾向にある。[0003] Paper is degradable in the natural environment, and even if it is buried, it will decompose over a long period of time. Additionally, because it does not emit harmful gases when incinerated, it has come to be used in disposable wrapping paper, containers, etc. in place of less degradable plastics. In addition, there is a tendency to collect and reuse these paper containers from the standpoint of protecting forest resources.
【０００４】しかし、紙でできた包装紙、容器等は強度
が低く、また、耐水性が低いことから牛乳やジュースを
入れる紙パックや紙コップにはポリマーと紙とを張り合
わせたラミネート紙が使用されている。また、本の表紙
や化粧箱等にも、消費者の美的欲求を満たすため、表面
が滑らかで光沢のあるラミネート紙が多用されるように
なった。[0004] However, wrapping paper, containers, etc. made of paper have low strength and low water resistance, so laminated paper made by laminating polymer and paper is used for paper cartons and paper cups for storing milk and juice. has been done. In addition, laminated paper with a smooth and glossy surface has come to be widely used for book covers, cosmetic cases, etc. in order to satisfy the aesthetic desires of consumers.
【０００５】これらの用途に用いられるポリマーとして
は、これまでポリエチレン、ポリプロピレン等のポリオ
レフィン系のフィルムが用いられていた。しかし、これ
らのポリマーは自然環境下での分解性がほとんどなく、
廃棄され埋設された場合、本来分解性である紙の分解速
度を大幅に低下させる。また、紙を回収しパルプ資源と
して再使用するに際し、パルプを離解させる工程でフィ
ルムがじゃまになり、効率を低下させる。また、離解し
たパルプの中からポリマーフィルムを分離する技術も必
要になる。さらに、ポリマー片がパルプに混入する可能
性もあるため、回収パルプは高級な用途の紙には用いる
ことができない。このように、これまで廃棄や回収の際
に問題を生じないポリマーフィルムと紙からなるラミネ
ート紙は知られていなかった。[0005] Polyolefin films such as polyethylene and polypropylene have so far been used as polymers for these applications. However, these polymers have little degradability in the natural environment,
When discarded and buried, it significantly slows down the decomposition rate of paper, which is inherently degradable. Furthermore, when paper is collected and reused as a pulp resource, the film becomes a hindrance in the process of disintegrating the pulp, reducing efficiency. In addition, a technique for separating the polymer film from the disintegrated pulp is also required. Additionally, recovered pulp cannot be used in paper for high-grade applications because polymer pieces may be mixed into the pulp. Thus, until now, there has been no known laminated paper made of a polymer film and paper that does not cause problems during disposal or recovery.
【０００６】[0006]
【発明が解決しようとする課題】従って本発明は、ポリ
オレフィン系のフィルムによるラミネート紙の持つ欠点
のない、自然環境下で易分解性のラミネート紙を提供す
ることを課題とする。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a laminated paper which does not have the disadvantages of laminated papers made of polyolefin films and is easily degradable in natural environments.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、前記課題
を得るために鋭意検討した結果、土中や水中などで長期
間の間に分解する性質を持つポリ乳酸のフィルムを紙と
接着すると十分な接着性を示し、また、このラミネート
紙は、強度と耐水性に優れさらに表面の光沢がよく美し
い外観を持つことを見いだし本発明を完成した。[Means for Solving the Problems] As a result of intensive studies to achieve the above-mentioned problems, the present inventors have developed a method for bonding a polylactic acid film, which has the property of decomposing in soil or water over a long period of time, to paper. They found that this laminated paper showed sufficient adhesion, had excellent strength and water resistance, and had a beautiful appearance with a glossy surface, and completed the present invention.
【０００８】すなわち本発明は、ポリ乳酸または乳酸と
オキシカルボン酸のコポリマーを主成分とする熱可塑性
分解性ポリマーと、紙からなる分解性ラミネート紙、で
ある。That is, the present invention is a degradable laminated paper made of paper and a thermoplastic degradable polymer whose main component is polylactic acid or a copolymer of lactic acid and oxycarboxylic acid.
【０００９】本発明のラミネート紙は、強度と耐水性に
優れさらに表面の光沢がよく美しい外観を持つとともに
、ポリマー成分は土中や水中などで長期間の間に分解し
、本来分解性である紙の分解速度を損なうこともない。The laminated paper of the present invention has excellent strength and water resistance, and has a beautiful appearance with a glossy surface, and the polymer component decomposes over a long period of time in soil or water, and is inherently degradable. It does not impair the decomposition speed of paper.
【００１０】さらに、このラミネート紙は、アルカリ性
の条件下容易に表面のポリマーフィルムが溶解し、紙の
部分だけを回収することができると言う特徴を持つ。Furthermore, this laminated paper has the characteristic that the polymer film on the surface easily dissolves under alkaline conditions, and only the paper portion can be recovered.
【００１１】本発明に用いられるポリマーは、ポリ乳酸
またはポリ乳酸と他のオキシカルボン酸のポリマーとの
混合物、または乳酸と他のオキシカルボン酸とのコポリ
マーである。The polymer used in the present invention is polylactic acid or a mixture of polylactic acid and other oxycarboxylic acid polymers, or a copolymer of lactic acid and other oxycarboxylic acids.
【００１２】他のオキシカルボン酸としては、グリコー
ル酸、３−ヒドロキシ酪酸、４−ヒドロキシ酪酸、４−
ヒドロキシ吉草酸、５−ヒドロキシ吉草酸、６−ヒドロ
キシカプロン酸等が用いられる。Other oxycarboxylic acids include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, and 4-hydroxybutyric acid.
Hydroxyvaleric acid, 5-hydroxyvaleric acid, 6-hydroxycaproic acid, etc. are used.
【００１３】これらのポリマーは、乳酸、あるいは他の
オキシカルボン酸から直接脱水重縮合することによって
合成した物でも良いし、ラクタイド、またはグリコライ
ドやε−カプロラクトン、またはそれらの混合物を開環
重合することによって得られた物でも良い。またポリ乳
酸と他のオキシカルボン酸のポリマーを高温下エステル
交換反応することによって合成したコポリマーでも良い
。ポリマーを構成する乳酸は、Ｌ−乳酸またはＤ−乳酸
またはそれらの混合物のいずれでもよい。These polymers may be synthesized by direct dehydration polycondensation from lactic acid or other oxycarboxylic acids, or may be synthesized by ring-opening polymerization of lactide, glycolide, ε-caprolactone, or a mixture thereof. It may also be something obtained by doing so. It may also be a copolymer synthesized by transesterifying a polymer of polylactic acid and another oxycarboxylic acid at high temperature. The lactic acid constituting the polymer may be L-lactic acid, D-lactic acid, or a mixture thereof.
【００１４】ポリマーの重合度は、１５０から２０、０
００が好ましい。これより低い重合度ではフィルム等の
成形品にしたときの強度が小さく実用に適さない。また
、これより重合度が高いと、熱時溶融した状態での粘度
が高く、成形加工性が劣る。The degree of polymerization of the polymer is from 150 to 20.0.
00 is preferred. If the degree of polymerization is lower than this, the strength when molded into a film or the like is low and it is not suitable for practical use. On the other hand, if the degree of polymerization is higher than this, the viscosity in a hot molten state will be high and the moldability will be poor.
【００１５】本発明のラミネート紙に用いられる紙は、
アート紙（塗被紙）、クラフト紙、ロール紙、ライスペ
ーパー、その他加工原紙、クロス紙、ボール紙などが用
いられる。これらの紙は、再生したパルプを含む紙でも
かまわない。[0015] The paper used for the laminated paper of the present invention is
Art paper (coated paper), kraft paper, roll paper, rice paper, other processed base papers, cloth paper, cardboard, etc. are used. These papers may include papers containing recycled pulp.
【００１６】ラミネートの方法としては、ウェットラミ
ネーション、ドライラミネーション、押し出しラミネー
ション、ホットメルトラミネーション等の通常知られて
いる方法を用いることができる。As the lamination method, commonly known methods such as wet lamination, dry lamination, extrusion lamination, and hot melt lamination can be used.
【００１７】ウェットラミネーションのように接着剤を
必要とする方法でも実施することができるが、紙とフィ
ルムの分解性を妨害しないために接着剤を用いない方法
が好ましい。接着剤を用いる場合には、膠、ゼラチン、
カゼイン、澱粉等の分解性の物を用いることが好ましい
。この他にも、ポリマーを溶剤に溶かし、紙に塗る方法
でも実施することができる。Although a method requiring an adhesive such as wet lamination can be carried out, a method not using an adhesive is preferred in order not to interfere with the degradability of the paper and film. When using adhesives, glue, gelatin,
It is preferable to use degradable materials such as casein and starch. Besides this, it can also be carried out by dissolving the polymer in a solvent and applying it to paper.
【００１８】ラミネートするポリマーの厚みは特に制限
はないが、通常数μから数１００μである。The thickness of the polymer to be laminated is not particularly limited, but is usually from several microns to several hundred microns.
【００１９】本発明の分解性ラミネート紙はさらに他の
フィルム、例えばアルミ薄やセロハン等と積層して用い
ることもできる。The degradable laminated paper of the present invention can also be used by laminating it with other films such as thin aluminum or cellophane.
【００２０】[0020]
【実施例】以下、実施例及び比較例により本発明の方法
を具体的に説明する。
実施例１
１５０ｍｍ×１５０ｍｍの８２ｇ／ｍ２ のクラフト紙
に接着剤として３０％ゼラチンを塗布し、重量平均分子
量１５万のポリＬ−乳酸から得られた厚さ３０μｍのフ
ィルムを重ねて１ｋｇ／ｃｍ２ の圧力で一晩圧着した
。紙とポリマーフィルムの接着力は良好で、丈夫なラミ
ネート紙が得られた。このラミネート紙を、１Ｎ水酸化
ナトリウム水溶液中６０℃に加熱したところ、１時間後
には表面のポリマー層が溶解消滅し、残った紙の部分は
容易に引き裂くことができた。またこのラミネート紙を
、土壌中に埋め１カ月後に取り出して調べたところ、表
面のフィルムは劣化しており、容易に引き裂くことがで
きた。EXAMPLES The method of the present invention will be specifically explained below using Examples and Comparative Examples. Example 1 A 150 mm x 150 mm 82 g/m2 kraft paper was coated with 30% gelatin as an adhesive, and a 30 μm thick film obtained from poly-L-lactic acid with a weight average molecular weight of 150,000 was layered to form a 1 kg/cm2 paper. It was crimped with pressure overnight. The adhesive strength between the paper and polymer film was good, and a durable laminated paper was obtained. When this laminated paper was heated to 60° C. in a 1N aqueous sodium hydroxide solution, the polymer layer on the surface dissolved and disappeared after one hour, and the remaining paper could be easily torn off. When this laminated paper was buried in soil and taken out and examined one month later, it was found that the surface film had deteriorated and could be easily torn.
【００２１】実施例２
１５０ｍｍ×１５０ｍｍの６５．５ｇ／ｍ２ の上質紙
に実施例１と同様のポリ乳酸フィルムをを重ねて２００
℃の熱プレスで３０ｋｇ／ｃｍ２ の圧力下５分間圧着
した。
紙とポリマーフィルムの接着力は良好で、丈夫で表面の
光沢の良い美しいフィルムが得られた。このラミネート
紙を、１Ｎ水酸化ナトリウム水溶液中６０℃に加熱した
ところ、１時間後には表面のポリマー層が溶解消滅し、
残った紙の部分は容易に引き裂くことができた。またこ
のラミネート紙を、土壌中に埋め１カ月後に取り出して
調べたところ、表面のフィルムは劣化しており、容易に
引き裂くことができた。Example 2 A polylactic acid film similar to that in Example 1 was layered on a 65.5 g/m2 high-quality paper measuring 150 mm x 150 mm for 200
It was pressed using a hot press at 30 kg/cm2 for 5 minutes. The adhesion between the paper and the polymer film was good, and a durable and beautiful film with a glossy surface was obtained. When this laminated paper was heated to 60°C in a 1N aqueous sodium hydroxide solution, the polymer layer on the surface dissolved and disappeared after 1 hour.
The remaining paper portion could be easily torn off. When this laminated paper was buried in soil and taken out and examined one month later, it was found that the surface film had deteriorated and could be easily torn.
【００２２】実施例３
ポリＬ−乳酸のフィルムの代わりに、重量平均分子量１
１万のＬ−乳酸とＤ−乳酸の９：１のコポリマーから得
られた厚さ２５μｍのフィルムを用いた以外は実施例２
と同様の方法でラミネート紙を得た。紙とポリマーフィ
ルムの接着力は良好で、丈夫で表面の光沢の良い美しい
フィルムが得られた。このラミネート紙を、１Ｎ水酸化
ナトリウム水溶液中６０℃に加熱したところ、１時間後
には表面のポリマー層が溶解消滅し、残った紙の部分は
容易に引き裂くことができた。またこのラミネート紙を
、土壌中に埋め１カ月後に取り出して調べたところ、表
面のフィルムは劣化しており、容易に引き裂くことがで
きた。Example 3 Instead of a poly-L-lactic acid film, a film with a weight average molecular weight of 1
Example 2 except that a 25 μm thick film obtained from a 9:1 copolymer of 10,000 L-lactic acid and D-lactic acid was used.
A laminated paper was obtained in the same manner. The adhesion between the paper and the polymer film was good, and a durable and beautiful film with a glossy surface was obtained. When this laminated paper was heated to 60° C. in a 1N aqueous sodium hydroxide solution, the polymer layer on the surface dissolved and disappeared after one hour, and the remaining paper could be easily torn off. When this laminated paper was buried in soil and taken out and examined one month later, it was found that the surface film had deteriorated and could be easily torn.
【００２３】実施例４
ポリＬ−乳酸のフィルムの代わりに、重量平均分子量５
万のＬ−乳酸とグリコール酸の１：１のコポリマーから
得られた厚さ２５μｍのフィルムを用いた以外は実施例
２と同様の方法でラミネート紙を得た。紙とポリマーフ
ィルムの接着力は良好で、丈夫で表面の光沢の良い美し
いフィルムが得られた。このラミネート紙を、１Ｎ水酸
化ナトリウム水溶液中６０℃に加熱したところ、１時間
後には表面のポリマー層が溶解消滅し、残った紙の部分
は容易に引き裂くことができた。またこのラミネート紙
を、土壌中に埋め１カ月後に取り出して調べたところ、
表面のフィルムは劣化しており、容易に引き裂くことが
できた。Example 4 Instead of a poly-L-lactic acid film, a film with a weight average molecular weight of 5
A laminated paper was obtained in the same manner as in Example 2, except that a 25 μm thick film obtained from a 1:1 copolymer of L-lactic acid and glycolic acid was used. The adhesion between the paper and the polymer film was good, and a durable and beautiful film with a glossy surface was obtained. When this laminated paper was heated to 60° C. in a 1N aqueous sodium hydroxide solution, the polymer layer on the surface dissolved and disappeared after one hour, and the remaining paper could be easily torn off. Also, when this laminated paper was buried in soil and removed after one month, it was examined.
The surface film was deteriorated and could be easily torn.
【００２４】実施例５
ポリＬ−乳酸のフィルムの代わりに、重量平均分子量６
万のＬ−乳酸と６−ヒドロキシカプロン酸の１：１のコ
ポリマーから得られた厚さ２５μｍのフィルムを用いた
以外は実施例２と同様の方法でラミネート紙を得た。紙
とポリマーフィルムの接着力は良好で、丈夫で表面の光
沢の良い美しいフィルムが得られた。このラミネート紙
を、１Ｎ水酸化ナトリウム水溶液中６０℃に加熱したと
ころ、１時間後には表面のポリマー層が溶解消滅し、残
った紙の部分は容易に引き裂くことができた。またこの
ラミネート紙を、土壌中に埋め１カ月後に取り出して調
べたところ、表面のフィルムは劣化しており、容易に引
き裂くことができた。Example 5 Instead of a film of poly L-lactic acid, a film with a weight average molecular weight of 6
A laminated paper was obtained in the same manner as in Example 2, except that a 25 μm thick film obtained from a 1:1 copolymer of L-lactic acid and 6-hydroxycaproic acid was used. The adhesion between the paper and the polymer film was good, and a durable and beautiful film with a glossy surface was obtained. When this laminated paper was heated to 60° C. in a 1N aqueous sodium hydroxide solution, the polymer layer on the surface dissolved and disappeared after one hour, and the remaining paper could be easily torn off. When this laminated paper was buried in soil and taken out and examined one month later, it was found that the surface film had deteriorated and could be easily torn.
【００２５】実施例６
１５０ｍｍ×１５０ｍｍの６５．０ｇ／ｍ２ の上質紙
に分子量１１万のポリＬ−乳酸の５％クロロホルム溶液
を０．５ｇ塗布し、室温で一晩乾燥した。得られたラミ
ネート組成物を５０℃減圧下乾燥した。丈夫で表面の光
沢の良い美しいフィルムが得られた。このラミネート紙
を、１Ｎ水酸化ナトリウム水溶液中６０℃に加熱したと
ころ、１時間後には表面のポリマー層が溶解消滅し、残
った紙の部分は容易に引き裂くことができた。またこの
ラミネート紙を、土壌中に埋め１カ月後に取り出して調
べたところ、表面のフィルムは劣化しており、容易に引
き裂くことができた。Example 6 0.5 g of a 5% chloroform solution of poly-L-lactic acid having a molecular weight of 110,000 was coated on a 65.0 g/m 2 high-quality paper measuring 150 mm x 150 mm and dried overnight at room temperature. The obtained laminate composition was dried at 50° C. under reduced pressure. A beautiful film was obtained that was durable and had a good surface gloss. When this laminated paper was heated to 60° C. in a 1N aqueous sodium hydroxide solution, the polymer layer on the surface dissolved and disappeared after one hour, and the remaining paper could be easily torn off. When this laminated paper was buried in soil and taken out and examined one month later, it was found that the surface film had deteriorated and could be easily torn.
【００２６】[0026]
【発明の効果】本発明により、土中や水中などの自然環
境下で一定の期間で分解し、また紙の回収工程に於いて
も容易に分解して通常の紙と同様の扱いをすることがで
きる、強度と耐水性に優れさらに表面の光沢がよく美し
い外観を持ったラミネート紙が得られる。[Effects of the Invention] According to the present invention, it decomposes within a certain period of time in natural environments such as underground or underwater, and it also decomposes easily during the paper recovery process and can be treated in the same way as ordinary paper. This produces laminated paper with excellent strength and water resistance, as well as a glossy surface and a beautiful appearance.
Claims (3)
酸のコポリマーを主成分とする熱可塑性分解性ポリマー
と、紙からなる分解性ラミネート紙。1. Degradable laminated paper made of paper and a thermoplastic degradable polymer whose main component is polylactic acid or a copolymer of lactic acid and oxycarboxylic acid.
れらの混合物である請求項１のラミネート紙。2. The laminated paper according to claim 1, wherein the lactic acid is D-lactic acid, L-lactic acid or a mixture thereof.
たは６−ヒドロキシカプロン酸である請求項１のラミネ
ート紙。3. The laminated paper according to claim 1, wherein the oxycarboxylic acid is glycolic acid or 6-hydroxycaproic acid.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10705291A JP3071861B2 (en) | 1991-05-13 | 1991-05-13 | Degradable laminated paper |
| CA 2068368 CA2068368A1 (en) | 1991-05-13 | 1992-05-11 | Degradable laminate composition |
| DE1992624772 DE69224772T3 (en) | 1991-05-13 | 1992-05-12 | Degradable laminate composition |
| EP19920304269 EP0514137B2 (en) | 1991-05-13 | 1992-05-12 | Degradable laminate composition |
| US08/338,791 US5434004A (en) | 1991-05-13 | 1994-11-08 | Degradable laminate composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10705291A JP3071861B2 (en) | 1991-05-13 | 1991-05-13 | Degradable laminated paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04336246A true JPH04336246A (en) | 1992-11-24 |
| JP3071861B2 JP3071861B2 (en) | 2000-07-31 |
Family
ID=14449292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10705291A Expired - Lifetime JP3071861B2 (en) | 1991-05-13 | 1991-05-13 | Degradable laminated paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3071861B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08252895A (en) * | 1995-03-16 | 1996-10-01 | Mitsubishi Plastics Ind Ltd | Decomposable laminated material |
| US5714230A (en) * | 1993-11-18 | 1998-02-03 | Mitsui Toatsu Chemicals, Inc. | Degradable aliphatic polyester formed products |
| JP2001058372A (en) * | 1999-06-16 | 2001-03-06 | Toray Ind Inc | Laminate |
| JP2001260281A (en) * | 2000-01-11 | 2001-09-25 | Toray Ind Inc | Laminated film |
| JP2003212270A (en) * | 2002-10-30 | 2003-07-30 | Mitsubishi Plastics Ind Ltd | Container for seeing through contents |
| JP2006247876A (en) * | 2005-03-08 | 2006-09-21 | Kira Shiko:Kk | Laminate having biodegradability |
| JP4809215B2 (en) * | 2003-06-03 | 2011-11-09 | ビオテック ビオローギッシュ ナチューフェアパックンゲン ゲーエムベーハー ウント コンパニ カーゲー | Fiber sheet coated or impregnated with biodegradable polymer or polymer blend |
-
1991
- 1991-05-13 JP JP10705291A patent/JP3071861B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714230A (en) * | 1993-11-18 | 1998-02-03 | Mitsui Toatsu Chemicals, Inc. | Degradable aliphatic polyester formed products |
| US5763098A (en) * | 1993-11-18 | 1998-06-09 | Mitsui Chemicals, Inc. | Degradable aliphatic polyester formed products |
| JPH08252895A (en) * | 1995-03-16 | 1996-10-01 | Mitsubishi Plastics Ind Ltd | Decomposable laminated material |
| JP2001058372A (en) * | 1999-06-16 | 2001-03-06 | Toray Ind Inc | Laminate |
| JP2001260281A (en) * | 2000-01-11 | 2001-09-25 | Toray Ind Inc | Laminated film |
| JP2003212270A (en) * | 2002-10-30 | 2003-07-30 | Mitsubishi Plastics Ind Ltd | Container for seeing through contents |
| JP4809215B2 (en) * | 2003-06-03 | 2011-11-09 | ビオテック ビオローギッシュ ナチューフェアパックンゲン ゲーエムベーハー ウント コンパニ カーゲー | Fiber sheet coated or impregnated with biodegradable polymer or polymer blend |
| JP2006247876A (en) * | 2005-03-08 | 2006-09-21 | Kira Shiko:Kk | Laminate having biodegradability |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3071861B2 (en) | 2000-07-31 |
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