JPH06135457A - Paper container - Google Patents
Paper containerInfo
- Publication number
- JPH06135457A JPH06135457A JP28841992A JP28841992A JPH06135457A JP H06135457 A JPH06135457 A JP H06135457A JP 28841992 A JP28841992 A JP 28841992A JP 28841992 A JP28841992 A JP 28841992A JP H06135457 A JPH06135457 A JP H06135457A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- plastic
- paper container
- laminated
- cup
- 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
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920001610 polycaprolactone Polymers 0.000 claims abstract description 12
- 229920001577 copolymer Polymers 0.000 claims abstract description 5
- REKYPYSUBKSCAT-UHFFFAOYSA-N 3-hydroxypentanoic acid Chemical compound CCC(O)CC(O)=O REKYPYSUBKSCAT-UHFFFAOYSA-N 0.000 claims abstract 8
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract description 11
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000002650 laminated plastic Substances 0.000 abstract description 3
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical compound OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 58
- 229920003023 plastic Polymers 0.000 description 28
- 239000004033 plastic Substances 0.000 description 28
- 239000007788 liquid Substances 0.000 description 12
- 229920000704 biodegradable plastic Polymers 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000010893 paper waste Substances 0.000 description 3
- 239000011087 paperboard Substances 0.000 description 3
- IUPHTVOTTBREAV-UHFFFAOYSA-N 3-hydroxybutanoic acid;3-hydroxypentanoic acid Chemical compound CC(O)CC(O)=O.CCC(O)CC(O)=O IUPHTVOTTBREAV-UHFFFAOYSA-N 0.000 description 2
- 229920013642 Biopol™ Polymers 0.000 description 2
- 241001428397 Taito Species 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000005445 natural material Substances 0.000 description 2
- 238000007500 overflow downdraw method Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- JRHWHSJDIILJAT-UHFFFAOYSA-N 2-hydroxypentanoic acid Chemical compound CCCC(O)C(O)=O JRHWHSJDIILJAT-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical compound C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000002699 waste material 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
- 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
Landscapes
- Wrappers (AREA)
- Laminated Bodies (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は生分解性のプラスチック
を紙に積層した紙からなる紙容器に関し、使用後埋立分
解又は焼却処理可能なものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper container made of paper in which a biodegradable plastic is laminated on paper, which can be disposed of in landfill or incinerated after use.
【０００２】[0002]
【従来の技術】近年の環境問題で、廃棄後もそのままの
形状で残ってしまう従来より用いられてきたプラスチッ
クに対して、微生物により環境中において生化学的に完
全に分解する分解性プラスチックが注目されている。2. Description of the Related Art Degradable plastics that are completely biochemically decomposed in the environment by microorganisms have attracted attention as opposed to the plastics that have been used in the past, which remain in their original shape after disposal due to recent environmental problems. Has been done.
【０００３】包装分野、特に紙容器では、天然素材であ
る紙単独では強度不足、防水性がないなどの理由から、
紙と他のプラスチックを貼り合わせたりした状態で現在
も広く用いられており、主に紙カートン（箱）、紙カッ
プ、紙トレー（皿）などの容器（紙器）の分野で用いら
れている。一般にこれらのプラスチックを積層した紙容
器はそのほとんどがワンウェイの使い捨てが主で、一度
限りの使用で廃棄物となってしまい、焼却または埋め立
て処理される。In the field of packaging, especially in paper containers, paper alone, which is a natural material, lacks strength and is not waterproof.
It is still widely used in a state where paper and other plastics are stuck together, and is mainly used in the field of containers (paper containers) such as paper cartons (boxes), paper cups, and paper trays (plates). In general, most of the paper containers laminated with these plastics are one-way disposables, which become wastes after one-time use and are incinerated or landfilled.
【０００４】つまり、紙のような天然素材に生分解性の
無いプラスチックを貼合わせた素材で作られた容器は、
本来の生分解性を失ってしまい、環境中で分解されずに
残留する。このような状況の中で、紙本来の生分解性を
損なうことなくプラスチックを積層した紙容器を用いる
ことが好ましい。That is, a container made of a material obtained by laminating a non-biodegradable plastic on a natural material such as paper is
It loses its original biodegradability and remains in the environment without being decomposed. In such a situation, it is preferable to use a paper container in which plastics are laminated without impairing the original biodegradability of paper.
【０００５】我々は既に、この紙容器や他の包装材の素
材として、紙、板紙、セロファンをはじめレーヨンやそ
れらを用いた不織布などの生分解性のある天然素材を主
体とした基材の、少なくとも片面に生分解性のプラスチ
ックを積層させた積層体を提案した。（特願平３−２４
９１０６号）これらの素材を用いて、加熱融着法等を用
いる従来のプラスチックを積層した紙からなる積層体の
成形方法により成形した紙容器は容器全体が生分解性を
有することになる。As a material for the paper container and other packaging materials, we have already used paper, paperboard, cellophane, rayon, and non-woven fabrics made of them as a base material mainly composed of biodegradable natural materials. We have proposed a laminate in which biodegradable plastic is laminated on at least one side. (Japanese Patent Application No. 3-24
No. 9106) A paper container formed by using these materials by a conventional method for forming a laminated body of paper in which plastics are laminated by using a heat fusion method or the like has biodegradability as a whole.
【０００６】しかし、生分解性のプラスチックをその片
面だけに積層した紙を素材とした場合は、プラスチック
面同士のみの接着だけではなく、紙面とプラスチック面
との接着も必要になる。この紙面とプラスチック面との
接着を加熱融着法により成形しようとするとき、生分解
性のプラスチックとして３−ヒドロキシ酪酸の重合体
（以下、Ｐ（３ＨＢ）とする）または３−ヒドロキシ酪
酸と３−ヒドロキシ吉草酸の共重合体（以下、Ｐ（３Ｈ
Ｂ−３ＨＶ）とする）を使用した場合は接着強度の点で
成形が困難となる場合があった。[0006] However, when a paper made of biodegradable plastic laminated only on one side thereof is used as a material, not only adhesion between the plastic surfaces but also adhesion between the paper surface and the plastic surface is required. When the adhesive between the paper surface and the plastic surface is to be molded by a heat fusion method, a polymer of 3-hydroxybutyric acid (hereinafter referred to as P (3HB)) or 3-hydroxybutyric acid and 3 as a biodegradable plastic. -Hydroxyvaleric acid copolymer (hereinafter referred to as P (3H
B-3HV) is used, molding may be difficult in terms of adhesive strength.
【０００７】また、Ｐ（３ＨＢ）またはＰ（３ＨＢ−３
ＨＶ）は加工温度約２００℃以上の加熱で分解し、異臭
を発生するという問題点があった。Further, P (3HB) or P (3HB-3
HV) is decomposed by heating at a processing temperature of about 200 ° C. or higher, and has a problem of generating an offensive odor.
【０００８】[0008]
【発明が解決しようとする課題】本発明は以上のような
問題点を解決するためになされたものであり、その課題
とするところは、Ｐ（３ＨＢ）またはＰ（３ＨＢ−３Ｈ
Ｖ）からなる生分解性のプラスチックを積層した紙容器
を成形する上で、十分な接着強度を得ることが出来、低
い加工温度で成形でき、加熱による分解と異臭の発生を
防ぐことにできる紙容器を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the problem is that P (3HB) or P (3HB-3H).
A paper that can obtain sufficient adhesive strength for molding a paper container laminated with biodegradable plastic consisting of V), can be molded at a low processing temperature, and can prevent decomposition due to heating and generation of offensive odor. To provide a container.
【０００９】[0009]
【課題を解決するための手段】本発明は前記課題を解決
するため、Ｐ（３ＨＢ−３ＨＶ）を紙に積層した紙（以
下、プラスチック積層紙とする）からなる紙容器におい
て、ヒドロキシ吉草酸（以下、ＨＶとする）の構成比が
５〜２０重量％であるか、または、Ｐ（３ＨＢ）または
Ｐ（３ＨＢ−３ＨＶ）にポリε−カプロラクトン（以
下、ＰＣＬとする）を任意の割合で混合することを特徴
とする紙容器を提供する。In order to solve the above-mentioned problems, the present invention provides a paper container made of paper (hereinafter, referred to as plastic laminated paper) in which P (3HB-3HV) is laminated on paper, and hydroxyvaleric acid ( The composition ratio of HV) is 5 to 20% by weight, or P (3HB) or P (3HB-3HV) is mixed with poly ε-caprolactone (hereinafter referred to as PCL) at an arbitrary ratio. A paper container characterized by being provided.
【００１０】以下本発明について詳細に説明する。本発
明に係るＰ（３ＨＢ−３ＨＶ）としては、そのＨＶ含有
率が５〜２０重量％のものを使用する。ここで、ＨＶ含
有率は単一ポリマーとしての含有率だけではなく、ＨＶ
含有率の異なるＰ（３ＨＢ−３ＨＶ）の混合によってＨ
Ｖ含有率を調整したものでもよい。The present invention will be described in detail below. As P (3HB-3HV) according to the present invention, one having an HV content of 5 to 20% by weight is used. Here, the HV content is not only the content as a single polymer but also the HV
H by mixing P (3HB-3HV) with different contents
The V content may be adjusted.
【００１１】また、Ｐ（３ＨＢ）またはＰ（３ＨＢ−３
ＨＶ）に任意の割合でＰＣＬを混合したものを使用す
る。Further, P (3HB) or P (3HB-3
HV) mixed with PCL at an arbitrary ratio is used.
【００１２】これらの生分解性のプラスチックと紙との
積層方法は、通常のプラスチック積層紙の製造に用いら
れる方法でよく、紙へのプラスチックフィルムのラミネ
ーション、または紙へのプラスチックの溶融押出コーテ
ィング等の方法で積層できるが、特願平３−２４９１０
６号に示した製造方法が特に適している。The method of laminating these biodegradable plastics and paper may be a method used for the production of ordinary plastic laminated paper, such as lamination of plastic film on paper, or melt extrusion coating of plastic on paper. It can be laminated by the method described in Japanese Patent Application No. 3-24910.
The manufacturing method shown in No. 6 is particularly suitable.
【００１３】また、ラミネーションの場合に接着剤を、
溶融押出コーティングの場合もアンカーコート剤等を必
要とすることがあるが、プラスチック積層紙の生分解性
への影響を考えると、分解性のない一般的な接着剤、ア
ンカーコート剤は用いないほうが好ましい。Also, in the case of lamination, an adhesive is used,
In the case of melt extrusion coating, an anchor coating agent etc. may be required, but considering the influence on the biodegradability of plastic laminated paper, it is better not to use a general non-degradable adhesive or anchor coating agent. preferable.
【００１４】そしてこれらの容器への成形加工について
は、従来のプラスチック積層紙の成形と同様の方法で行
うことが出来る。装置としては、紙カップ成形機、打抜
機、サック貼機、製函機等があげられる。The molding of these containers can be carried out in the same manner as the conventional molding of plastic laminated paper. Examples of the apparatus include a paper cup molding machine, a punching machine, a sack sticking machine, and a box making machine.
【００１５】[0015]
【作用】本発明において、Ｐ（３ＨＢ−３ＨＶ）および
ＨＶを含まないポリヒドロキシ酪酸（以下Ｐ（３ＨＢ）
とする）は共に結晶性ポリマーであり、ＨＶ含有量によ
り結晶化度、融点が変化する。紙面とプラスチック面と
の接着において、真に接着するには、ホットエアー等の
加熱によりプラスチック表面が非結晶状態になり溶融し
て、紙面のパルプ繊維同士の隙間に入り込み、その後冷
却され固定されなければならない。融点および結晶化度
が高いものは、完全に溶融し切れないで圧着されるた
め、ほとんどの場合が擬似接着状態であり、形状として
は正常に接着しているようだが、強度的に不十分である
ことが多い。真に接着できる条件は、プラスチックを溶
融する熱量、すなわち加熱温度と加熱時間の積により決
まるが、Ｐ（３ＨＢ−３ＨＶ）のＨＶ含有率によりその
条件は変化する。すなわち、ＨＶ含有率が増えるに従い
融点が下がり、結晶化度も下がるので、プラスチックを
溶融する熱量が少なくて済むようになる。また、ＰＣＬ
をＰ（３ＨＢ）またはＰ（３ＨＢ−３ＨＶ）に混合する
ことによって、Ｐ（３ＨＢ）またはＰ（３ＨＢ−３Ｈ
Ｖ）の物性に柔軟性と衝撃強度を付加して、紙容器の製
函加工等の罫線付け時における、積層したプラスチック
面のクラック発生による液洩れ、プラスチック層の剥離
等の積層体自体の物性を改善できる。In the present invention, P (3HB-3HV) and polyhydroxybutyric acid containing no HV (hereinafter P (3HB)
Is a crystalline polymer, and the crystallinity and melting point change depending on the HV content. In order to achieve true adhesion between the paper surface and the plastic surface, the plastic surface becomes amorphous when it is heated by hot air or the like and melts, enters the gap between the pulp fibers on the paper surface, and then is cooled and fixed. I have to. The ones with a high melting point and crystallinity are not completely melted and are crimped, so in most cases they are in a pseudo-bonded state, and they seem to be bonded properly as a shape, but they are not strong enough. Often there is. The conditions under which true adhesion is possible are determined by the amount of heat for melting the plastic, that is, the product of the heating temperature and the heating time, but the conditions change depending on the HV content of P (3HB-3HV). That is, as the HV content increases, the melting point decreases and the crystallinity also decreases, so that the amount of heat for melting the plastic can be reduced. Also, PCL
To P (3HB) or P (3HB-3HV) by mixing P (3HB) or P (3HB-3HV)
By adding flexibility and impact strength to the physical properties of V), physical properties of the laminate itself such as liquid leakage due to cracking of the laminated plastic surface and peeling of the plastic layer at the time of ruled line formation such as box making of a paper container Can be improved.
【００１６】[0016]
【実施例】 ＜実施例１＞巻き取りの板紙（ノーコートアイボリー、
２２０ｇ／ｍ2 ）の片面にＨＶ含有率５、８、１５、２
０％のＰ（３ＨＢ−３ＨＶ）（英国ＩＣＩ社製：「バイ
オポール」）をＴダイ溶融押出法にてそれぞれ３０μｍ
の厚みに積層したプラスチック積層紙を用いて、接着方
法にホットエアー（設定温度：２５０℃）を用いた紙カ
ップ成形機にて、図１に斜視図、図２にその展開図を示
した形状の紙カップをプラスチック面が内面になるよう
に成形した。EXAMPLES Example 1 Rolled paperboard (uncoated ivory,
220 g / m 2 ) on one side with HV content of 5, 8, 15, 2
0% of P (3HB-3HV) (manufactured by ICI, UK: "Biopol") is 30 μm each by T-die melt extrusion method.
Using a paper cup molding machine that uses hot air (set temperature: 250 ° C.) for the bonding method, using a plastic laminated paper laminated in the thickness shown in FIG. 1, a perspective view is shown in FIG. The paper cup was molded with the plastic side facing inward.
【００１７】＜比較例１＞ＨＶ含有率３％の前記Ｐ（３
ＨＢ−３ＨＶ）およびＨＶを含まないＰ（３ＨＢ）を実
施例１と同様に積層し、紙カップを成形した。<Comparative Example 1> The above P (3) having an HV content of 3%
HB-3HV) and P (3HB) containing no HV were laminated in the same manner as in Example 1 to form a paper cup.
【００１８】成形物の仕上がり状態を目視にて観察し
て、液洩れチェック液をカップ８分目まで容器に満たし
て洩れ状態を観察した。さらに、図１のサイドヒートシ
ール部３、ボトムヒートシール部４の剥離強度を測定し
た。The finished state of the molded product was visually observed, and the leak check state was observed by filling the container with the liquid leak check liquid up to the 8th minute of the cup. Furthermore, the peel strength of the side heat seal part 3 and the bottom heat seal part 4 of FIG. 1 was measured.
【００１９】実施例１及び比較例１で用いたＨＶ含有率
の異なるＰ（３ＨＢ−３ＨＶ）及びＨＶを含まないＰ
（３ＨＢ）の何れの積層紙を用いても良好にカップに成
形することが出来た。それぞれの紙カップの液洩れチェ
ックの結果を表１に示した。P (3HB-3HV) having different HV contents used in Example 1 and Comparative Example 1 and P containing no HV
Even if any of the laminated papers of (3HB) was used, it could be molded into a cup well. Table 1 shows the results of the liquid leak check of each paper cup.
【００２０】[0020]
【表１】 [Table 1]
【００２１】ＨＶ含有率が５％未満の積層体を用いたカ
ップは３０分以内でチェック液がサイドシール部より染
み出してきた。ＨＶ含有率が５〜２０％のものを用いた
カップは２時間しても変化はなく、チェック液の洩れだ
しはなかった。In the cup using the laminate having the HV content of less than 5%, the check liquid oozes out from the side seal portion within 30 minutes. The cup using an HV content of 5 to 20% did not change even after 2 hours, and the check liquid did not leak.
【００２２】ヒートシール部分の強度測定結果について
は表２に示した。The results of measuring the strength of the heat-sealed portion are shown in Table 2.
【００２３】[0023]
【表２】 [Table 2]
【００２４】カップ外側の紙面とカップ内側のプラスチ
ック面との接着であるサイドシール部分の強度は、ＨＶ
含有率が５％未満の積層体のものでは、２００ｇ／１５
ｍｍ以下の弱い強度で、プラスチックが溶融しないまま
接着された擬似接着状態であった。これに対してＨＶ含
有率５〜２０％のものはプラスチックが溶融して紙面の
繊維間に入り込み完全に接着しており、剥離させると剥
離面は紙の繊維間で生じ（紙ムケ状態）、十分な強度が
出ていた。プラスチック面同士の接着であるボトムヒー
トシール部分は、何れの積層体を用いたカップにおいて
十分な強度が出て完全に接着しており、剥離面は紙の繊
維間で生じた（紙ムケ状態）。The strength of the side seal portion, which is the adhesion between the paper surface outside the cup and the plastic surface inside the cup, is HV.
200 g / 15 for a laminate with a content of less than 5%
It had a weak strength of mm or less and was in a pseudo-bonded state in which the plastic was bonded without melting. On the other hand, in the case of the HV content of 5 to 20%, the plastic melts and penetrates between the fibers of the paper surface and is completely bonded, and when peeled off, the peeled surface occurs between the fibers of the paper (paper waste state), There was enough strength. The bottom heat seal part, which is the adhesion between plastic surfaces, has sufficient strength in the cup using any of the laminates and is completely adhered, and the peeled surface occurs between the fibers of the paper (paper waste state) .
【００２５】＜実施例２＞巻取りの板紙（ノーコートア
イボリー、２２０ｇ／ｍ2 ）の片面に、ＨＶ含有率３％
のＰ（３ＨＢ−３ＨＶ）（英国ＩＣＩ社製：「バイオポ
ール」）あるいはＰ（３ＨＢ）に対してＰＣＬ（米国Ｕ
ＣＣ社製：「トーンＰ−７６７Ｅ」）を５％、２５％、
５０％、９０％（重量％）で２軸押出混練機にて混合し
たものを、実施例１と同様の方法で２０μｍの厚みに積
層したプラスチック積層紙を用いて実施例１と同様の方
法で紙カップを成形した。成形時のホットエアー温度は
２５０℃に設定した。成形カップの評価は実施例１と同
様に、液洩れチェックおよびサイドシール部の剥離強度
を測定した。Example 2 An HV content of 3% was applied to one side of a rolled paperboard (uncoated ivory, 220 g / m 2 ).
P (3HB-3HV) (manufactured by ICI in the UK: “Biopol”) or P (3HB) for PCL (U.S.
CC: "Tone P-767E") 5%, 25%,
In the same manner as in Example 1, a mixture of 50% and 90% (% by weight) mixed in a twin-screw extruder was used, and a plastic laminated paper laminated in a thickness of 20 μm in the same manner as in Example 1 was used. A paper cup was molded. The hot air temperature during molding was set to 250 ° C. As for the evaluation of the molding cup, the liquid leakage check and the peel strength of the side seal portion were measured in the same manner as in Example 1.
【００２６】実施例２で用いたＰＣＬを混合した８種類
の積層体の何れを用いても良好にカップに成形すること
ができた。カップの液洩れチェックの結果を表３に示
す。It was possible to satisfactorily form a cup using any of the eight types of laminates in which the PCL used in Example 2 was mixed. Table 3 shows the result of the liquid leakage check of the cup.
【００２７】[0027]
【表３】 [Table 3]
【００２８】実施例１にてＰＣＬを混合していないＨＶ
含有率が５％未満のＰ（３ＨＢ−３ＨＶ）の積層体を用
いたカップは３０分でチェック液がサイドシール部より
染み出してきたが、同じ３％ＨＶ含有率のものやＰ（３
ＨＢ）にＰＣＬを混合したプラスチック積層体について
は、２時間しても変化はなく、チェック液の洩れだしは
なかった。HV not mixed with PCL in Example 1
In the cup using the laminated body of P (3HB-3HV) whose content rate is less than 5%, the check liquid oozes out from the side seal part in 30 minutes, but the same content of 3% HV content or P (3
The plastic laminate obtained by mixing HB) with PCL did not change even after 2 hours, and the check liquid did not leak.
【００２９】ヒートシール部分の強度測定結果について
は表４に示した。The results of measuring the strength of the heat-sealed portion are shown in Table 4.
【００３０】[0030]
【表４】 [Table 4]
【００３１】紙面とプラスチック面との接着であるサイ
ドシール部分の強度は、ＰＣＬを混合することにより向
上し、剥離面は紙の繊維間で生じ（紙ムケ状態）、十分
な値がえられた。また、何れの場合においてもＰ（３Ｈ
Ｂ）やＰ（３ＨＢ−３ＨＶ）の過熱分解による異臭の発
生はなかった。The strength of the side seal portion, which is the adhesion between the paper surface and the plastic surface, was improved by mixing PCL, and the peeled surface was generated between the fibers of the paper (paper waste state), and a sufficient value was obtained. . In any case, P (3H
B) and P (3HB-3HV) did not generate an offensive odor due to overheated decomposition.
【００３２】[0032]
【発明の効果】本発明の紙容器は、生分解性を有するプ
ラスチックを紙に積層したプラスチック積層紙を用いて
いるため、プラスチックを積層することにより紙が本来
有している生分解性機能を損なうことなく、製品である
紙容器全体が生分解性があり、さらに積層体素材に用い
るＰ（３ＨＢ−３ＨＶ）のＨＶ含有率を５〜２０％に限
定することにより、ヒートシール性を向上させ液洩れを
防ぎ、あるいはＰ（３ＨＢ）やＰ（３ＨＢ−３ＨＶ）に
ＰＣＬを混合することにより、ヒートシール性を向上さ
せ液洩れを防ぐことができ、通常より低い温度で成形加
工することが出来、これによって過熱による異臭の発生
も抑えることが出来る。Since the paper container of the present invention uses the plastic laminated paper in which the biodegradable plastic is laminated on the paper, the paper has the biodegradable function originally possessed by laminating the plastics. Without damaging, the entire paper container as a product is biodegradable, and further, the heat sealability is improved by limiting the HV content of P (3HB-3HV) used for the laminate material to 5 to 20%. Preventing liquid leakage, or by mixing PCL with P (3HB) or P (3HB-3HV), heat sealability can be improved and liquid leakage can be prevented, and molding can be performed at a lower temperature than usual. Therefore, it is possible to suppress the generation of offensive odor due to overheating.
【００３３】[0033]
【図１】本発明の紙カップの一実施例を示す斜視図であ
る。FIG. 1 is a perspective view showing an embodiment of a paper cup of the present invention.
【図２】図１の展開図である。FIG. 2 is a development view of FIG.
１…側面 ２…底面 ３…サイドシール部 ４…ボトムシール部 1 ... Side surface 2 ... Bottom surface 3 ... Side seal portion 4 ... Bottom seal portion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 相澤 哲生 東京都台東区台東一丁目５番１号 凸版印 刷株式会社内 (72)発明者 吉川 素子 東京都台東区台東一丁目５番１号 凸版印 刷株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Aizawa 1-5-1 Taito, Taito-ku, Tokyo Within Toppan Printing Co., Ltd. (72) Inventor Motoko Yoshikawa 1-5-1 Taito, Taito-ku, Tokyo Toppan Imprint Co., Ltd.
Claims (2)
酸の共重合体を紙に積層した紙からなる紙容器におい
て、３−ヒドロキシ吉草酸の構成比が５〜２０重量％で
あることを特徴とする紙容器。1. A paper container comprising a paper obtained by laminating a copolymer of 3-hydroxybutyric acid and 3-hydroxyvaleric acid on paper, wherein the composition ratio of 3-hydroxyvaleric acid is 5 to 20% by weight. And a paper container.
ロキシ酪酸と３−ヒドロキシ吉草酸の共重合体を紙に積
層した紙からなる紙容器において、前記重合体または共
重合体にポリε−カプロラクトンを任意の割合で混合す
ることを特徴とする紙容器。2. A paper container comprising a paper in which a polymer of 3-hydroxybutyric acid or a copolymer of 3-hydroxybutyric acid and 3-hydroxyvaleric acid is laminated on paper, wherein the polymer or copolymer is poly-ε-caprolactone. A paper container characterized by being mixed in any proportion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28841992A JP3134550B2 (en) | 1992-10-27 | 1992-10-27 | Paper container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28841992A JP3134550B2 (en) | 1992-10-27 | 1992-10-27 | Paper container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06135457A true JPH06135457A (en) | 1994-05-17 |
| JP3134550B2 JP3134550B2 (en) | 2001-02-13 |
Family
ID=17729977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28841992A Expired - Fee Related JP3134550B2 (en) | 1992-10-27 | 1992-10-27 | Paper container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3134550B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6033747A (en) * | 1996-10-29 | 2000-03-07 | Kaneka Corporation | Biodegradable laminate |
| WO2023063217A1 (en) * | 2021-10-14 | 2023-04-20 | 株式会社カネカ | Method for producing multilayer body |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8180143B2 (en) | 2008-12-23 | 2012-05-15 | General Electric Company | Method and system for estimating contact patterns |
-
1992
- 1992-10-27 JP JP28841992A patent/JP3134550B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6033747A (en) * | 1996-10-29 | 2000-03-07 | Kaneka Corporation | Biodegradable laminate |
| WO2023063217A1 (en) * | 2021-10-14 | 2023-04-20 | 株式会社カネカ | Method for producing multilayer body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3134550B2 (en) | 2001-02-13 |
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