JP2002226690A - Biodegradable synthetic paper having excellent folding property and method for preparing the same - Google Patents
Biodegradable synthetic paper having excellent folding property and method for preparing the sameInfo
- Publication number
- JP2002226690A JP2002226690A JP2001025294A JP2001025294A JP2002226690A JP 2002226690 A JP2002226690 A JP 2002226690A JP 2001025294 A JP2001025294 A JP 2001025294A JP 2001025294 A JP2001025294 A JP 2001025294A JP 2002226690 A JP2002226690 A JP 2002226690A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- synthetic paper
- biodegradable
- biodegradable synthetic
- paper
- 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
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、生分解性合成紙に
関し、特に、折り畳み性に優れ、紙同様に使用すること
のできる生分解性合成紙及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biodegradable synthetic paper, and more particularly to a biodegradable synthetic paper which has excellent foldability and can be used in the same manner as paper.
【０００２】[0002]
【従来技術】従来から、紙感覚を有する合成樹脂系合成
紙が上市されている。このような合成樹脂系合成紙にお
ける紙化技術としては、例えば、無機充填剤を含有する
熱可塑性樹脂シートまたはフィルムを適当な温度に加熱
した後、一軸延伸または二軸延伸することにより該シー
トまたはフィルム内部にボイドを形成させたり、熱可塑
性樹脂シートの表面に填料分散液を塗布する方法等が知
られている。しかしながら、このようにして得られた合
成樹脂系合成紙は、折り畳んでもその形状を保持するこ
とができず、すぐにもとの形に戻り、折り目が残らない
という折り畳み性の悪いものであるため、包装、製本、
製函等の用途に適するものではないという欠点があっ
た。2. Description of the Related Art Conventionally, synthetic resin-based synthetic paper having a paper feel has been marketed. As a papermaking technique for such synthetic resin-based synthetic paper, for example, after heating a thermoplastic resin sheet or film containing an inorganic filler to an appropriate temperature, the sheet or film is stretched uniaxially or biaxially. There are known a method of forming voids inside a film and a method of applying a filler dispersion to the surface of a thermoplastic resin sheet. However, the synthetic resin-based synthetic paper thus obtained cannot maintain its shape even when folded, returns to its original shape immediately, and has poor foldability such that no fold remains. , Packaging, bookbinding,
There is a disadvantage that it is not suitable for uses such as box making.
【０００３】[0003]
【発明が解決しようとする課題】本発明者らは、上記の
欠点を解決するために鋭意研究を行った結果、所定の生
分解性樹脂を基材樹脂とする押し出し発泡シートを挟圧
することにより、生分解性と折り畳み性に優れた合成紙
を容易に得ることができることを見出し、本発明を完成
した。従って、本発明の目的は、折り畳み性に優れ、通
常の紙と同様に使用することのできる生分解性合成紙を
提供することにある。SUMMARY OF THE INVENTION The present inventors have conducted intensive studies to solve the above-mentioned drawbacks, and as a result, by pressing an extruded foam sheet using a predetermined biodegradable resin as a base resin. The present inventors have found that synthetic paper excellent in biodegradability and foldability can be easily obtained, and completed the present invention. Accordingly, an object of the present invention is to provide a biodegradable synthetic paper which has excellent foldability and can be used in the same manner as ordinary paper.
【０００４】[0004]
【課題を解決するための手段】本発明の上記の目的は、
ポリ乳酸樹脂と変性ポリビニルアルコールアロイ化澱粉
樹脂及び／またはエステル化澱粉樹脂からなる生分解性
樹脂を基材樹脂とする生分解性合成紙であって、折り畳
み性に優れた生分解性合成紙によって達成された。SUMMARY OF THE INVENTION The above objects of the present invention are as follows.
A biodegradable synthetic paper using a biodegradable resin comprising a polylactic acid resin and a modified polyvinyl alcohol alloyed starch resin and / or an esterified starch resin as a base resin, the biodegradable synthetic paper having excellent foldability. Achieved.
【０００５】[0005]
【発明の実施の形態】以下に、本発明の内容を詳細に説
明する。本発明においては、生分解性合成紙の基材とし
てポリ乳酸樹脂、並びに、変性ポリビニルアルコールア
ロイ化澱粉樹脂及び／またはエステル化澱粉樹脂からな
る生分解性樹脂を用いることができる。ポリ乳酸樹脂は
Ｄ−乳酸、Ｌ−乳酸のいずれか、もしくはこれら両成分
からなるラクチドを開環縮合してなる重合体、前記Ｄ−
又はＬ−乳酸のいずれか、もしくは両成分を直接脱水重
縮合して得られる重合体、または前記Ｄ−又はＬ−乳酸
のいずれか、もしくは前記両成分と他のヒドロキシカル
ボン酸（分子量２万以下）とを直接脱水重縮合して得ら
れる共重合体を挙げることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The contents of the present invention will be described below in detail. In the present invention, a biodegradable resin comprising a polylactic acid resin and a modified polyvinyl alcohol alloyed starch resin and / or an esterified starch resin can be used as a base material of the biodegradable synthetic paper. The polylactic acid resin is a polymer obtained by ring-opening condensation of lactide composed of either D-lactic acid or L-lactic acid, or both components,
Or a polymer obtained by direct dehydration polycondensation of either L-lactic acid or both components, or any of the D- or L-lactic acid, or both components and another hydroxycarboxylic acid (molecular weight of 20,000 or less) ) Can be mentioned.
【０００６】変性ポリビニルアルコールアロイ化澱粉樹
脂に使用する変性ポリビニルアルコール用の変性モノマ
ーとしては、グラフト化によりポリビニルアルコールを
不溶化する、スチレン、アクリロニトリル、ブタジエ
ン、イソブチレン、メタクリルアミド、エチレン、エチ
レンイミン、プロピレンイミン、カプロラクタム等のモ
ノマーが使用される。変性ポリビニルアルコールと澱粉
とのアロイ化の程度は製品の使用条件によって異なる
が、澱粉の比率は変性ポリビニルアルコールに対して１
〜３５重量％であることが好ましい。澱粉の比率が１重
量％では生分解性が不十分となり、３５重量％を超える
と紙としての耐水性が不十分となる。エステル化澱粉樹
脂としては、炭素数２〜１８の飽和・不飽和脂肪酸類、
芳香族カルボン酸類がエステル化されたエステル基を有
するものが好ましく、特にビニルエステル基を含有する
エステル化澱粉樹脂が好ましい。[0006] The modified monomers for the modified polyvinyl alcohol used in the modified polyvinyl alcohol alloyed starch resin include styrene, acrylonitrile, butadiene, isobutylene, methacrylamide, ethylene, ethyleneimine and propyleneimine, which insolubilize polyvinyl alcohol by grafting. And monomers such as caprolactam. The degree of alloying between the modified polyvinyl alcohol and the starch varies depending on the use conditions of the product, but the ratio of the starch is 1 to the modified polyvinyl alcohol.
Preferably it is ~ 35% by weight. If the starch ratio is 1% by weight, the biodegradability becomes insufficient, and if it exceeds 35% by weight, the water resistance of the paper becomes insufficient. As the esterified starch resin, saturated / unsaturated fatty acids having 2 to 18 carbon atoms,
Those having an ester group obtained by esterifying aromatic carboxylic acids are preferable, and esterified starch resins containing a vinyl ester group are particularly preferable.
【０００７】本発明は、上記生分解性樹脂を基材として
押し出して発泡シートを製造した後挟圧することによ
り、生分解性合成紙を製造する。押し出し発泡シート
は、前記生分解性樹脂を主成分とする原料に加熱分解型
発泡剤を予め混合または含有させたものを押し出し機で
溶融、混練した後、または該原料を押し出し機で溶融、
混錬しながら揮発性発泡剤を注入した後、押し出し機か
ら大気中に押し出すことにより製造することができる。
このときの発泡倍率は１．２〜５０倍であることが好ま
しい。According to the present invention, a biodegradable synthetic paper is produced by extruding the above-mentioned biodegradable resin as a base material to produce a foamed sheet and then sandwiching the sheet. The extruded foam sheet is a raw material containing the biodegradable resin as a main component, and a material obtained by previously mixing or containing a heat-decomposable foaming agent is melted by an extruder and kneaded, or the raw material is melted by an extruder,
It can be manufactured by injecting a volatile foaming agent while kneading, and then extruding it from the extruder into the atmosphere.
The expansion ratio at this time is preferably 1.2 to 50 times.
【０００８】加熱分解型発泡剤としては、アゾジカルボ
ンアミド、Ｎ，Ｎ’−ジニトロソペンタメチレンテトラ
ミン、Ｐ−Ｐ−オキシビスベンゼンスルホニルヒドラジ
ン等の有機系発泡剤；炭酸アンモニウム、炭酸水素ナト
リウム、炭酸水素アンモニウム、カルシウムアジド等の
無機系発泡剤がある。また、揮発性発泡剤としては水及
びプロパン、ブタン、ペンタン、ブタジエン等の低沸点
脂肪族炭化水素類等がある。Examples of the heat-decomposable foaming agent include organic foaming agents such as azodicarbonamide, N, N'-dinitrosopentamethylenetetramine, and PP-oxybisbenzenesulfonylhydrazine; ammonium carbonate, sodium hydrogencarbonate, and carbonic acid. There are inorganic blowing agents such as ammonium hydrogen and calcium azide. Examples of the volatile foaming agent include water and low-boiling aliphatic hydrocarbons such as propane, butane, pentane and butadiene.
【０００９】本発明おいては、生分解性樹脂としてポリ
乳酸樹脂と変性ポリビニルアルコールアロイ化澱粉樹脂
及び／またはエステル化澱粉樹脂の組合せを使用する
が、特に、ポリ乳酸樹脂に対する変性ポリビニルアルコ
ールアロイ化澱粉樹脂及び／またはエステル化澱粉樹脂
の割合が１０〜８０重量％であることが好ましい。１０
重量％未満では満足な発泡体を得るのが難しく、硬くて
脆いシートになる。また８０重量％を超えると発泡体を
得ることができるものの、柔らかすぎて紙感覚からは程
遠いシートになる。変性ポリビニルアルコールアロイ化
澱粉樹脂及び／またはエステル化澱粉樹脂の割合が１０
〜８０重量％の範囲内にあると、良好な発泡シートの製
造が可能である。In the present invention, a combination of a polylactic acid resin and a modified polyvinyl alcohol alloyed starch resin and / or an esterified starch resin is used as a biodegradable resin. It is preferable that the ratio of the starch resin and / or the esterified starch resin is 10 to 80% by weight. 10
If it is less than the weight percentage, it is difficult to obtain a satisfactory foam, and the sheet becomes hard and brittle. If it exceeds 80% by weight, a foam can be obtained, but the sheet is too soft and far from paper. When the ratio of the modified polyvinyl alcohol alloyed starch resin and / or the esterified starch resin is 10
When it is within the range of 〜80% by weight, a good foamed sheet can be produced.
【００１０】本発明においては、こうして得られた紙感
覚を有する発泡シートに折り畳み性を付与するために、
得られた押し出し発泡シートをカレンダーロール等の挟
圧機に通して押しつぶす。このようにすることによっ
て、発泡シートの厚みも紙と同程度に薄くなり、一層紙
感覚に優れたものとなる。このとき、押し出し発泡シー
トの厚さが挟圧前の１５〜４０％、密度が０．４５〜
１．０２ｇ／ｃｍ３となるように、挟圧することが好ま
しい。In the present invention, in order to impart foldability to the thus obtained foamed sheet having a feeling of paper,
The obtained extruded foamed sheet is crushed by passing it through a pressure machine such as a calender roll. By doing so, the thickness of the foamed sheet is reduced to the same level as that of paper, and the feeling of paper is further improved. At this time, the thickness of the extruded foam sheet is 15 to 40% before the pinching, and the density is 0.45 to
It is preferable to squeeze the pressure so as to be 1.02 g / cm 3 .
【００１１】挾圧後の発泡シートの厚さが挟圧前の４０
％より厚く、密度が０．４５ｇ／ｃｍ３未満の場合に
は、挟圧による発泡シート中の気泡の変形が不十分であ
るために、折り畳んだ時に折り目が残らないか、折り目
から切れてしまうなどの欠点が生じる。また、挟圧後発
泡シートの厚さが挟圧前の１５％来満で、密度が１．０
２ｇ／ｃｍ３を超えると、挟圧による発泡シート中の気
泡の変形が大きくなりすぎて壊れるので、発泡シートが
透明化したり、折り畳んだ時に簡単に切れたり割れたり
するので、紙感覚とは程遠いものになる。[0011] The thickness of the foamed sheet after clamping is 40 before the clamping.
% And a density of less than 0.45 g / cm 3 , the folds do not remain or break off when folded due to insufficient deformation of the bubbles in the foamed sheet due to pinching. Such disadvantages occur. Further, the thickness of the foamed sheet after squeezing is 15% of the thickness before squeezing, and the density is 1.0%.
If it exceeds 2 g / cm 3 , the bubbles in the foamed sheet due to pinching will deform too much and break, so that the foamed sheet becomes transparent or easily breaks or breaks when folded, so it is far from paper-like Become something.
【００１２】なお、本発明の生分解性合成紙に、塗工紙
としてのまたは未塗工紙としての用に応じ、筆記性、印
刷性、一層の折り畳み性等の紙感覚を付与する場合に
は、公知の技術を適用することができる。例えば、シー
ト状にした上記生分解性合成紙の表面に、炭酸カルシウ
ムその他の填料とバインダーの混合液を塗布したり、エ
ンボスロール、溶剤、コロナ放電等によって処理を施す
ことにより、また、シートの原料中に内部充填剤を添加
することにより、通常の紙とほぼ同様な感覚で使用する
ことができる。上記内部充填剤としては、例えば酸化チ
タン、炭酸カルシウム、タルク、シリカ、水酸化アルミ
ニウム等の無機微粒子や、セルロース、キチンキトサ
ン、澱粉、小麦タンパク等の有機粉状物質を用いること
ができる。これらの中でも、澱粉や小麦タンパクは生分
解性の促進という観点から特に好ましい。When the biodegradable synthetic paper of the present invention is imparted with paper sensation such as writability, printability, and further foldability, depending on whether it is used as coated paper or uncoated paper. A known technique can be applied. For example, the surface of the sheet-shaped biodegradable synthetic paper is coated with a mixture of calcium carbonate or other filler and a binder, or embossed with a roll, a solvent, or treated by corona discharge, etc. By adding an internal filler to the raw material, it can be used with almost the same feeling as ordinary paper. As the internal filler, for example, inorganic fine particles such as titanium oxide, calcium carbonate, talc, silica, and aluminum hydroxide, and organic powdery substances such as cellulose, chitin chitosan, starch, and wheat protein can be used. Among them, starch and wheat protein are particularly preferable from the viewpoint of promoting biodegradability.
【００１３】本発明においては、その基材として、生分
解性樹脂を用いて押し出し発泡シートを作製した後、該
シートを挟圧することにより生分解性合成紙を製造する
とともに、この合成紙に折り畳み性等の紙感覚を付与す
ることが可能となった。一方、本発明により製造された
生分解性合成紙は、印刷用紙、包装用紙等として一般的
な使用条件下で使用した場合であれば、３年程度の期間
は、強度、耐水性、耐候性等の面で従来の合成紙と同等
の性能を保持することができる。In the present invention, an extruded foam sheet is prepared using a biodegradable resin as a base material, and then the sheet is sandwiched to produce a biodegradable synthetic paper, and the synthetic paper is folded. It is possible to impart paper sensation such as character. On the other hand, the biodegradable synthetic paper manufactured according to the present invention has strength, water resistance, and weather resistance for a period of about three years when used under general use conditions as printing paper, packaging paper, and the like. In this respect, performance equivalent to that of conventional synthetic paper can be maintained.
【００１４】[0014]
【発明の効果】本発明の合成紙は、紙感覚に優れると共
に、実用上十分な期間、強度、印刷適性等の面で従来の
合成紙と同等の性能を有する上、生分解性であるので環
境適応性に優れている。また、本発明の生分解性合成紙
の厚さ、表面状態を調整することにより、印刷用紙、封
筒、書類入れ、ショッピングバッグ、各種包装紙、カー
トン等の製函用等に使用することができる。コンポスト
化が可能であるため、資源の有効利用の面からも有用で
ある。The synthetic paper of the present invention is excellent in paper feel, has the same performance as conventional synthetic paper in terms of practically sufficient period, strength, printability, etc. and is biodegradable. Excellent environmental adaptability. Further, by adjusting the thickness and surface condition of the biodegradable synthetic paper of the present invention, it can be used for printing paper, envelopes, document holders, shopping bags, various wrapping papers, box making of cartons, and the like. . Since composting is possible, it is also useful in terms of effective use of resources.
【００１５】[0015]
【実施例】以下に、本発明を実施例に基いて更に説明す
るが、本発明はこれによって限定されるものではない。 実施例１．ポリ乳酸樹脂（商品名「ラクティー＃５００
０」、（株）島津製作所製）１００重量部、澱粉比率３
２重量％の変性ポリビニルアルコールアロイ化澱粉樹脂
（商品名「マタビー」日本合成化学工業（株）製）３０
重量部、及びタルク６．５重量部を直径５０ｍｍの２つ
の押し出し機からなるタンデム押し出し機を用いて１９
０℃で混練し、押し出し機のシリンダー途中から混合樹
脂１００重量部あたりブタンを２０重量部の割合で圧入
し、口径１２０ｍｍ及び０．５ｍｍの間隔を持つサーキ
ュラーダイから、ダイ温度１４０℃で大気中に押し出し
て発泡シートを製造した。押し出し発泡シートの発泡倍
率は７．５倍、密度は０．１５ｇ／ｃｍ３、厚さは０．
５ｍｍであった。EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited thereto. Embodiment 1 FIG. Polylactic acid resin (trade name "Lacty # 500
0 ", 100 parts by weight, manufactured by Shimadzu Corporation, starch ratio 3
2% by weight modified polyvinyl alcohol alloyed starch resin (trade name "Mataby" manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 30
Parts by weight and 6.5 parts by weight of talc were converted to 19 parts by a tandem extruder consisting of two extruders having a diameter of 50 mm.
The mixture was kneaded at 0 ° C., and butane was injected at a rate of 20 parts by weight per 100 parts by weight of the mixed resin from the middle of the cylinder of the extruder. From a circular die having a diameter of 120 mm and an interval of 0.5 mm, a die temperature of 140 ° C. To produce a foam sheet. The extruded foam sheet has an expansion ratio of 7.5 times, a density of 0.15 g / cm 3 and a thickness of 0.5.
5 mm.
【００１６】次にこの発泡シートをロール間の挟圧が４
００ＫＮ／ｍのカレンダーロールに２回通し、密度が
０．６５ｇ／ｃｍ３、厚さが０．１２ｍｍの生分解性合
成紙を得た。得られた生分解性合成紙の折り畳み性、剛
性、印刷適性、生分解性についてテストした結果を表１
に示す。なお、表１に示した折り畳み性、剛性、印刷適
性、生分解性は以下のようにして評価した。Next, the foamed sheet is sandwiched with a pressure of 4 between rolls.
The sheet was passed through a calender roll of 00 KN / m twice to obtain a biodegradable synthetic paper having a density of 0.65 g / cm 3 and a thickness of 0.12 mm. Table 1 shows the results of testing the obtained biodegradable synthetic paper for foldability, rigidity, printability, and biodegradability.
Shown in The foldability, rigidity, printability, and biodegradability shown in Table 1 were evaluated as follows.
【００１７】折り畳み性：３ｃｍ×１０ｃｍの短冊状の
試験片を長さ方向の中心線から２つ折りにしたシートの
上に、１ｋｇの荷重を１分間かけた。折り畳み性の悪い
ものは、折り目を中心に経時的に開いて行くので、荷重
を取り除いて１０分間常温で放置した後に、折り目を中
心に開いた角度を測定し、その角度によって折り畳み性
を以下の４レベルに分けた。角度が小さい程折り畳み性
が良く、紙感覚に近いことを意味する。 Ａ：４０度未満‥‥‥‥‥‥‥‥‥良好 Ｂ：４０度以上９０度未満‥‥‥‥やや良 Ｃ：９０度以上‥‥‥‥‥‥‥‥‥不適 Ｄ：折畳み目より割れる。‥‥‥‥不適Foldability: A 1 kg load was applied for 1 minute on a sheet obtained by folding a 3 cm × 10 cm strip-shaped test piece from the center line in the length direction. Items with poor foldability open over time around the fold, so after removing the load and leaving it at room temperature for 10 minutes, measure the open angle around the fold, and determine the foldability according to the angle as follows. Divided into 4 levels. The smaller the angle, the better the foldability, which means closer to paper. A: less than 40 degrees {good} B: 40 degrees or more and less than 90 degrees ‥‥‥‥ somewhat good C: 90 degrees or more ‥‥‥‥‥‥‥‥‥ unsuitable D: broken from the fold . ‥‥‥‥ unsuitable
【００１８】剛性：ＡＳＴＭｌＤ８８２に準じ、引張り
速度５ｍｍ／分で試料を引張った時の、応力―伸長率曲
線を求め、この曲線の立ち上がりの勾配から引張り弾性
率を求めた。 印刷性：プロセスインキ（商品名「ニューチャンピオン
藍」大日本インキ化学（株）製）を用い、ＲＩテスター
にて試料表面に印刷した後、セットテスターを用いてイ
ンキ定着性を評価した。定着に要した時間が半日から５
分の場合は「可」、５分以内の場合は「良」とした。 生分解性：８．６ｃｍ×５．４ｃｍの試験片を８ヶ月間
土中に埋めて放置した後、これを掘り出してその状態を
観察した。Stiffness: According to ASTM ID882, a stress-elongation rate curve when a sample was pulled at a pulling rate of 5 mm / min was determined, and a tensile elastic modulus was determined from a rising slope of the curve. Printability: Using a process ink (trade name “New Champion Indigo”, manufactured by Dainippon Ink and Chemicals, Inc.), printing was performed on the sample surface with an RI tester, and the ink fixability was evaluated using a set tester. It takes 5 days to settle for half a day
In the case of minutes, "OK" was given, and in the case of less than 5 minutes, "OK". Biodegradability: A test piece of 8.6 cm × 5.4 cm was buried in the soil for 8 months and allowed to stand, and then dug out to observe its state.
【００１９】実施例２．実施例１で使用した変性ポリビ
ニルアルコールアロイ化澱粉樹脂の代りにエステル化澱
粉樹脂（商品名：「コーンポールＦＭ−３」日本コーン
スターチ（株）製）を使用したこと以外は、実施例１と
全く同様にして発泡シートを製造した。押し出し発泡シ
ートの発泡倍率は６．０倍、密度は０．２１ｇ／ｃ
ｍ３、厚さは０．４ｍｍであった。次にこの発泡シート
を、ロール間の挟圧が４００ＫＮ／ｍのカレンダーロー
ルに２回通し、密度が０．７０ｇ／ｃｍ３、厚さが０．
０８ｍｍの生分解性合成紙を得た。得られた生分解性合
成紙の折り畳み性、剛性、印刷適性、及び生分解性につ
いてテストした結果を表１に示す。Embodiment 2 FIG. Except that the modified polyvinyl alcohol alloyed starch resin used in Example 1 was replaced by an esterified starch resin (trade name: "Cornpole FM-3" manufactured by Nippon Cornstarch Co., Ltd.) A foam sheet was produced in the same manner. The expansion ratio of the extruded foam sheet is 6.0 times and the density is 0.21 g / c.
m 3 and thickness were 0.4 mm. Next, this foamed sheet is passed twice through a calender roll having a sandwiching pressure between the rolls of 400 KN / m, and has a density of 0.70 g / cm 3 and a thickness of 0.
08 mm biodegradable synthetic paper was obtained. Table 1 shows the results of tests on the foldability, rigidity, printability, and biodegradability of the obtained biodegradable synthetic paper.
【００２０】比較例１．ポリ乳酸樹脂の代りにポリアル
キレンアルカノエート樹脂（商品名「ビオノーレ＃３０
００」昭和高分子（株）製）を用いた他は実施例１と全
く同様にして、密度が０．５５ｇ／ｃｍ３、厚さが０．
１５ｍｍの生分解性合成紙を得た。得られた生分解性合
成紙のテスト結果を表１に示す。Comparative Example 1 Instead of polylactic acid resin, polyalkylene alkanoate resin (Bionore # 30
00 "(manufactured by Showa Polymer Co., Ltd.) except that the density was 0.55 g / cm 3 and the thickness was 0.1 mm.
A 15 mm biodegradable synthetic paper was obtained. Table 1 shows the test results of the obtained biodegradable synthetic paper.
【００２１】比較例２．押し出し発泡シートをカレンダ
ーロールを通さず挟圧行程を省いた他は、実施例１と同
様にして、発泡倍率が８．２倍、密度が０．１１ｇ／ｃ
ｍ３、厚さが０．６ｍｍの発泡シートを得た、得られた
シートのテスト結果を表１に示す。Comparative Example 2 A foaming ratio was 8.2 times and a density was 0.11 g / c in the same manner as in Example 1, except that the extruded foamed sheet was not passed through a calender roll and the pinching process was omitted.
An m 3 foam sheet having a thickness of 0.6 mm was obtained. Table 1 shows the test results of the obtained sheet.
【００２２】比較例３．実施例１で使用したポリ乳酸樹
脂のみを単独で使用したものは、発泡シートを作ること
ができなかった。 参考例１．参考例として、市販のポリプロピレン系合成
紙（商品名「ユポＦＰＧ＃１３０」王子油化合成紙製）
に対するテスト結果を表１に示す。Comparative Example 3 When only the polylactic acid resin used in Example 1 was used alone, a foamed sheet could not be produced. Reference Example 1. As a reference example, a commercially available polypropylene synthetic paper (trade name “Yupo FPG # 130” manufactured by Oji Oil Chemical Synthetic Paper)
Table 1 shows the test results.
【００２３】[0023]
【表１】 表１の結果は、本発明の合成紙が紙感覚に優れる上、生
分解性にも優れることを実証するものである。[Table 1] The results in Table 1 demonstrate that the synthetic paper of the present invention has excellent paper feel and excellent biodegradability.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｊ 9/04 １０１ Ｃ０８Ｊ 9/04 １０１ Ｃ０８Ｌ 3/04 Ｃ０８Ｌ 3/04 29/04 29/04 Ｂ 51/00 51/00 // Ｂ２９Ｋ 86:00 Ｂ２９Ｋ 86:00 105:04 105:04 Ｂ２９Ｌ 7:00 Ｂ２９Ｌ 7:00 Ｆターム(参考） 4F074 AA03 AA42 AA68 BA01 BA03 BA04 BA06 BA13 BA16 BA18 BA31 BA34 BA36 BA37 BA39 CA22 CC03Z DA24 DA52 4F207 AA01 AA19J AB02 AG01 AG20 AR12 KA01 KA11 KM06 KM16 KW23 KW26 4J002 AB04X AB04Y BE02X BE02Y BN20X BN20Y CF18W GT00──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08J 9/04 101 C08J 9/04 101 C08L 3/04 C08L 3/04 29/04 29/04 B 51 / 00 51/00 // B29K 86:00 B29K 86:00 105: 04 105: 04 B29L 7:00 B29L 7:00 F term (reference) 4F074 AA03 AA42 AA68 BA01 BA03 BA04 BA06 BA13 BA16 BA18 BA31 BA34 BA36 BA37 BA39 CA22 CC03Z DA24 DA52 4F207 AA01 AA19J AB02 AG01 AG20 AR12 KA01 KA11 KM06 KM16 KW23 KW26 4J002 AB04X AB04Y BE02X BE02Y BN20X BN20Y CF18W GT00
Claims (6)
ルアロイ化澱粉樹脂及び／またはエステル化澱粉樹脂か
らなる生分解性樹脂を基材樹脂とする生分解性合成紙で
あって、折り畳み時に折り目が残る、折り畳み性に優れ
た生分解性合成紙。1. A biodegradable synthetic paper using a biodegradable resin comprising a polylactic acid resin and a modified polyvinyl alcohol alloyed starch resin and / or an esterified starch resin as a base resin, wherein creases remain when folded. Biodegradable synthetic paper with excellent foldability.
ルコールアロイ化澱粉樹脂またはエステル化澱粉樹脂の
割合が、合わせて１０〜８０重量％である、請求項１に
記載された生分解性合成紙。2. The biodegradable synthetic paper according to claim 1, wherein the ratio of the modified polyvinyl alcohol alloyed starch resin or the esterified starch resin to the polylactic acid resin is 10 to 80% by weight in total.
／ｃｍ３である請求項１又は２に記載された生分解性合
成紙。3. The paper has a density of 0.45 to 1.02 g.
/ Cm 3. The biodegradable synthetic paper according to claim 1 or 2.
ルアロイ化澱粉樹脂及び／またはエステル化澱粉樹脂か
らなる生分解性樹脂を押出し発泡して発泡シートを得、
次いで、挟圧することを特徴とする請求項１〜３の何れ
かに記載された生分解性合成紙の製造方法。4. A foamed sheet is obtained by extruding and foaming a biodegradable resin comprising a polylactic acid resin and a modified polyvinyl alcohol alloyed starch resin and / or an esterified starch resin,
The method for producing biodegradable synthetic paper according to any one of claims 1 to 3, further comprising clamping.
ポリビニルアルコールアロイ化澱粉樹脂及び／またはエ
ステル化澱粉樹脂からなる生分解性樹脂を基材樹脂とし
て投入し、１５０℃〜２００℃で混練した後、基材樹脂
１００重量部当たり０．２〜５０重量部の発泡剤を添加
し、ダイ温度１２０℃〜１７０℃でサーキュラーダイか
ら押し出すと共に、引き取りながらカットして生分解性
樹脂の発泡シートを得る、請求項４に記載された生分解
性合成紙の製造方法。5. A biodegradable resin comprising a polylactic acid resin and a modified polyvinyl alcohol alloyed starch resin and / or an esterified starch resin is charged into a melt extruder as a base resin and kneaded at 150 ° C. to 200 ° C. Thereafter, 0.2 to 50 parts by weight of a foaming agent is added per 100 parts by weight of the base resin, and extruded from a circular die at a die temperature of 120 to 170 ° C., and cut while being taken off to form a foamed sheet of the biodegradable resin. The method for producing a biodegradable synthetic paper according to claim 4, which is obtained.
４０％とする如く挟圧する、請求項４又は５に記載され
た生分解性合成紙の製造方法。6. The thickness of the squeezing treatment sheet is set to 15 to 15 before squeezing.
The method for producing biodegradable synthetic paper according to claim 4 or 5, wherein the pressure is set so as to be 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001025294A JP3615489B2 (en) | 2001-02-01 | 2001-02-01 | A biodegradable synthetic paper excellent in foldability and a method for producing the same. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001025294A JP3615489B2 (en) | 2001-02-01 | 2001-02-01 | A biodegradable synthetic paper excellent in foldability and a method for producing the same. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002226690A true JP2002226690A (en) | 2002-08-14 |
| JP3615489B2 JP3615489B2 (en) | 2005-02-02 |
Family
ID=18890313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001025294A Expired - Fee Related JP3615489B2 (en) | 2001-02-01 | 2001-02-01 | A biodegradable synthetic paper excellent in foldability and a method for producing the same. |
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| Country | Link |
|---|---|
| JP (1) | JP3615489B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020194199A1 (en) * | 2019-03-28 | 2020-10-01 | 積水化成品工業株式会社 | Method for producing biodegradable resin expanded sheet |
-
2001
- 2001-02-01 JP JP2001025294A patent/JP3615489B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020194199A1 (en) * | 2019-03-28 | 2020-10-01 | 積水化成品工業株式会社 | Method for producing biodegradable resin expanded sheet |
| CN113508019A (en) * | 2019-03-28 | 2021-10-15 | 积水化成品工业株式会社 | Manufacturing method of biodegradable resin foam sheet |
| US12091524B2 (en) | 2019-03-28 | 2024-09-17 | Sekisui Kasei Co., Ltd. | Method for producing biodegradable resin expanded sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3615489B2 (en) | 2005-02-02 |
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