JP2001279018A - Starch-based biodegradable resin composition and its molded product - Google Patents
Starch-based biodegradable resin composition and its molded productInfo
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- JP2001279018A JP2001279018A JP2000090515A JP2000090515A JP2001279018A JP 2001279018 A JP2001279018 A JP 2001279018A JP 2000090515 A JP2000090515 A JP 2000090515A JP 2000090515 A JP2000090515 A JP 2000090515A JP 2001279018 A JP2001279018 A JP 2001279018A
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- starch
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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- Biological Depolymerization Polymers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、澱粉、生分解性樹
脂、アクリル系樹脂改質剤等を主成分とし、生産性、生
分解性、生産コストがより優れた成形材料及び成形体を
提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a molding material and a molded product containing starch, a biodegradable resin, an acrylic resin modifier, etc. as main components, and having higher productivity, biodegradability and production cost. Is what you do.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】澱粉系
生分解性組成物としては、澱粉を主成分とする組成物、
及び澱粉と生分解性樹脂を複合した組成物が主流であ
る。しかし、澱粉を主成分にした生分解組成物は、機械
的性質(例えば、引っ張り強さ(伸び)、圧縮強さ、曲げ
強さ、弾性率、衝撃値、硬度等)が不十分であるという
問題があった。さらには、耐水性や耐湿性が劣るなどの
欠点も見られ、広い分野での使用が困難であった。BACKGROUND OF THE INVENTION As a starch-based biodegradable composition, a composition containing starch as a main component,
The mainstream is a composition in which starch and a biodegradable resin are combined. However, biodegradable compositions based on starch are said to have insufficient mechanical properties (e.g., tensile strength (elongation), compressive strength, flexural strength, elastic modulus, impact value, hardness, etc.). There was a problem. Furthermore, there were also disadvantages such as poor water resistance and poor moisture resistance, making it difficult to use in a wide range of fields.
【０００３】また、澱粉と生分解性樹脂を複合した組成
物のように、原料の一部として澱粉を使用した組成物で
は、押し出し機での流動性や成形加工機での金型への付
着、フィルム及びシート成形での垂れ下がり（ドロ−ダウ
ン）などの成形加工性が問題になっていた。さらに、澱
粉系生分解性組成物を発泡体にすると、発泡状態が均一
でなかったり、発泡体が脆くなりやすく、澱粉と生分解
性樹脂を複合した組成物を発泡体とした場合には、生分
解性樹脂の配合割合を多くしなければならないなどの問
題も有った。[0003] Further, in a composition using starch as a part of raw materials, such as a composition in which starch and a biodegradable resin are combined, fluidity in an extruder and adhesion to a mold in a molding machine are reduced. In addition, moldability such as sagging in film and sheet molding has been a problem. Furthermore, when the starch-based biodegradable composition is made into a foam, the foaming state is not uniform, or the foam tends to be brittle, and when a composition obtained by combining starch and a biodegradable resin is made into a foam, There was also a problem that the blending ratio of the biodegradable resin had to be increased.
【０００４】このような状況下、本発明の目的は、一定
以上の機械的性質を保持した澱粉を主成分とする生分解
性組成物を提供することにある。さらに本発明の目的
は、成形加工性が改善された澱粉と生分解性樹脂を複合
した組成物を提供することにある。加えて本発明の目的
は、発泡状態が均一で、かつ高い強度を有する、澱粉を
主成分とする生分解性組成物または澱粉と生分解性樹脂
を複合した組成物からなる発泡体を提供することにあ
る。[0004] Under such circumstances, an object of the present invention is to provide a biodegradable composition containing starch as a main component and maintaining a certain level of mechanical properties. It is a further object of the present invention to provide a composition comprising a starch and a biodegradable resin having improved moldability. In addition, an object of the present invention is to provide a foam composed of a biodegradable composition containing starch as a main component or a composition of starch and a biodegradable resin, having a uniform foaming state and high strength. It is in.
【０００５】又フッ素樹脂（アクリル変成ホ゜リテトラフルオロエチレン）
は澱粉系生分解性フ゜ラスチックに優れたシート押出、フ゛ロー成形及
び真空成形でのト゛ロ-タ゛ウン性、並びに優れた発泡成形性
(発泡均一)を示す。しかし、組成の一部にフッ素樹脂が
含まれているためこれを使用した成形品を廃棄処分する
時焼却が出来ないと言った欠点があった。そのためフッ
素が入らないで同様な効果のある添加剤を探したとこ
ろ、アクリル系樹脂改質剤が澱粉系生分解性フ゜ラスチックに
有効であること見出し、本発明に至った。Fluorine resin (modified polytetrafluoroethylene)
Is a starch-based biodegradable plastic with excellent sheet extrusion, flow-forming properties in flow molding and vacuum forming, and excellent foam moldability
(Uniform foaming). However, there is a drawback that since a part of the composition contains a fluororesin, it cannot be incinerated when a molded article using the same is disposed of. Therefore, when an additive having the same effect was searched for without containing fluorine, it was found that an acrylic resin modifier was effective for a starch-based biodegradable plastic, and the present invention was reached.
【０００６】[0006]
【課題を解決するための手段】本発明者らの検討の結
果、澱粉を主成分とする生分解性組成物または澱粉と生
分解性樹脂を複合した組成物にアクリル系樹脂改質剤を
配合することで、上記課題を解消した組成物を提供でき
ることを見いだし本発明を完成した。本発明は、澱粉、
澱粉用可塑剤及びアクリル系樹脂改質剤、または澱粉、
澱粉用可塑剤、アクリル系樹脂改質剤及び生分解性樹脂
からなり、澱粉または澱粉及び生分解性樹脂１００重量
部に対して０．０１〜５重量部のアクリル系樹脂改質剤
及び１０〜 ５０重量部の澱粉用可塑剤を含有する組成
物に関する。さらに本発明の上記組成物は、微粉末故紙
をさらに含有するものであることができる。また、本発
明は、上記組成物からなる成形体を包含し、成形体は発
泡体である事ができる。As a result of the study of the present inventors, an acrylic resin modifier was added to a biodegradable composition containing starch as a main component or a composition comprising starch and a biodegradable resin. As a result, the present inventors have found that it is possible to provide a composition that has solved the above-mentioned problems, and has completed the present invention. The present invention provides a starch,
Starch plasticizer and acrylic resin modifier, or starch,
A plasticizer for starch, an acrylic resin modifier and a biodegradable resin, and 0.01 to 5 parts by weight of an acrylic resin modifier and 10 to 10 parts by weight of starch or starch and biodegradable resin. It relates to a composition containing 50 parts by weight of a starch plasticizer. Further, the composition of the present invention may further contain fine powder waste paper. Further, the present invention includes a molded article comprising the above composition, and the molded article can be a foam.
【０００７】[0007]
【発明の実施の形態】本発明の組成物が含有する澱粉
は、従来からの公知の澱粉であることができ、例えば、
未加工澱粉及び加工澱粉のいずれであっても良い。未加
工澱粉としては、例えば馬鈴薯澱粉、甘藷澱粉、タピオ
カ澱粉等の地下澱粉及び小麦澱粉、コーンスターチ、サ
ゴ澱粉、米澱粉等の地上澱粉、ワキシースターチ、ハイ
アミローススターチ等の特殊澱粉を挙げることが出来
る。DETAILED DESCRIPTION OF THE INVENTION The starch contained in the composition of the present invention can be a conventionally known starch.
Any of unprocessed starch and processed starch may be used. Examples of the raw starch include ground starch such as potato starch, sweet potato starch, tapioca starch and the like, wheat starch, corn starch, sago starch, ground starch such as rice starch, waxy starch, and special starch such as high amylose starch. .
【０００８】加工澱粉としては、白色デキストリン、黄
色デキストリン、ブリテイシュガムなどの焙焼デキスト
リン、酸化澱粉、低粘度変性澱粉等の分解産物とアルフ
ァー澱粉を挙げることが出来る。さらに、澱粉誘導体と
しては酢酸エステル、リン酸エステル等の澱粉エステ
ル、カルボキシエチルエーテル、ヒドロキシエチルエー
テル、ヒドロキシプロピルエーテル、陽性澱粉等の澱粉
エーテルを挙げることが出来る。Examples of the processed starch include roasted dextrins such as white dextrin, yellow dextrin and british gum, degradation products such as oxidized starch and low-viscosity modified starch, and alpha starch. Further, examples of the starch derivatives include starch esters such as acetate esters and phosphate esters, and starch ethers such as carboxyethyl ether, hydroxyethyl ether, hydroxypropyl ether and positive starch.
【０００９】生分解性樹脂しては例えば、脂肪族ポリエ
ステル樹脂であるポリカプロラクトン、ポリ乳酸、ポリ
ブチレンアジペート、ポリブチレンサクシネート、ポリ
ヒドロキシブチレート・バリレート共重合体、アセチル
セルロース、ポリビニルアルコールなどを挙げることが
出来る。Examples of the biodegradable resin include aliphatic polyester resins such as polycaprolactone, polylactic acid, polybutylene adipate, polybutylene succinate, polyhydroxybutyrate / valerate copolymer, acetylcellulose and polyvinyl alcohol. Can be mentioned.
【００１０】アクリル系樹脂改質剤は、例えば、メタク
リル酸メチル−アクリル酸アルキル共重合体や、メタク
リル酸メチル−アクリル酸アルキル共重合体を主成分と
する樹脂改質剤を挙げることができる。メタクリル酸メ
チル−アクリル酸アルキル共重合体からなるアクリル系
樹脂改質剤は、例えば、メタブレンＰとして市販されて
いるメタクリル酸メチル、アクリル酸アルキル共重合物
を挙げることができる。アクリル系樹脂改質剤として用
いられるメタクリル酸メチル−アクリル酸アルキル共重
合体は、平均分子量として、例えば、１００万〜５００
万の範囲のものであることができる。また、アクリル系
樹脂改質剤は、メタクリル酸メチル−アクリル酸アルキ
ル共重合体にアクリルゴムを混合したものであることも
できる。この場合、メタクリル酸メチル−アクリル酸ア
ルキル共重合体１００重量部に対してアクリルゴムを１
０〜３０重量部混合してなるものであることができる。Examples of the acrylic resin modifier include, for example, a methyl methacrylate-alkyl acrylate copolymer and a resin modifier containing a methyl methacrylate-alkyl acrylate copolymer as a main component. Examples of the acrylic resin modifier comprising a methyl methacrylate-alkyl acrylate copolymer include, for example, methyl methacrylate and alkyl acrylate copolymer commercially available as Methrene P. The methyl methacrylate-alkyl acrylate copolymer used as an acrylic resin modifier has an average molecular weight of, for example, 1,000,000 to 500,000.
It can be in the range of ten thousand. Further, the acrylic resin modifier may be a mixture of a methyl methacrylate-alkyl acrylate copolymer and an acrylic rubber. In this case, 1 part of the acrylic rubber was added to 100 parts by weight of the methyl methacrylate-alkyl acrylate copolymer.
It may be a mixture of 0 to 30 parts by weight.
【００１１】澱粉用可塑剤としては水及び公知の可塑剤
から適宜選択することが出来る。公知の可塑剤として
は、例えば、生分解性を有する高沸点可塑剤を挙げるこ
とが出来る。そのような可塑剤の例としては、エチレン
グリコール、プロピレングリコール、グリセリン、ソル
ビトール、ポリエチレングリコ−ル、ポリプロピレング
リコール、１，３−ブタンジオール、イソデシルアルコ
ール、n−デシルアルコール、ジエチレングリコール、
ジグリセリン、ポリグリセリン、ジプロピレングリコー
ル、ｎ−オクチルアルコール等を挙げることが出来る。The starch plasticizer can be appropriately selected from water and known plasticizers. Examples of the known plasticizer include a high-boiling plasticizer having biodegradability. Examples of such plasticizers include ethylene glycol, propylene glycol, glycerin, sorbitol, polyethylene glycol, polypropylene glycol, 1,3-butanediol, isodecyl alcohol, n-decyl alcohol, diethylene glycol,
Examples thereof include diglycerin, polyglycerin, dipropylene glycol, and n-octyl alcohol.
【００１２】アクリル系樹脂改質剤の配合量は、澱粉１
００重量部または澱粉及び生分解性樹脂１００重量部に
対して、０．０１重量部以上、５重量部以下とする。ア
クリル系樹脂改質剤の配合量は、本発明の組成物の用途
等を考慮して適宜決定されるが、低配合量で効果を発揮
し得る発泡体分野でも、０．０１重量部以上でないとア
クリル系樹脂改質剤の添加効果が見られない。また、比
較的高配合量を必要とする射出成形分野でも、５重量部
を超えると、効果は頭打ちであり、コスト高になるだけ
である。アクリル系樹脂改質剤の配合量は、好ましく
は、澱粉１００重量部または澱粉及び生分解性樹脂１０
０重量部に対して、０．０３重量部以上、１重量部以下
とすることである。The compounding amount of the acrylic resin modifier is starch 1
0.01 to 5 parts by weight based on 00 parts by weight or 100 parts by weight of starch and biodegradable resin. The blending amount of the acrylic resin modifier is appropriately determined in consideration of the use of the composition of the present invention and the like.However, even in the field of a foam that can exert an effect at a low blending amount, the amount is not more than 0.01 part by weight. And the effect of adding the acrylic resin modifier was not observed. In addition, even in the field of injection molding requiring a relatively high blending amount, if the amount exceeds 5 parts by weight, the effect is flattened out and only the cost is increased. The blending amount of the acrylic resin modifier is preferably 100 parts by weight of starch or starch and biodegradable resin 10.
0.03 parts by weight or more and 1 part by weight or less with respect to 0 parts by weight.
【００１３】澱粉用可塑剤の配合量は、澱粉１００重量
部または澱粉及び生分解性樹脂１００重量部に対して、
１０重量部以上、５０重量部以下とすることが適当であ
る。但し、この配合比率は澱粉・生分解性樹脂の比及び
故紙が複合された場合にはこれら複合体に対する故紙の
比によって、またその使用用途にとっても最適配合比率
は異なる。一般的には澱粉可塑剤の配合比率が１０重量
部未満だと流動しにくく硬すぎる物性を示し、５０重量
部を超えると逆に柔らかすぎたり、製品にした後で可塑
剤がブリードアウトする恐れが生ずる。澱粉用可塑剤の
配合量は、好ましくは、澱粉１００重量部または澱粉及
び生分解性樹脂１００重量部に対して、２０重量部以
上、４０重量部以下である。The amount of the plasticizer for starch is 100 parts by weight of starch or 100 parts by weight of starch and biodegradable resin.
It is appropriate that the amount is not less than 10 parts by weight and not more than 50 parts by weight. However, the optimum blending ratio varies depending on the ratio of starch / biodegradable resin and the ratio of wastepaper to the composite when wastepaper is composited, and also on the intended use. In general, if the blending ratio of the starch plasticizer is less than 10 parts by weight, it is difficult to flow and shows too hard physical properties. Occurs. The amount of the plasticizer for starch is preferably 20 parts by weight or more and 40 parts by weight or less based on 100 parts by weight of starch or 100 parts by weight of starch and biodegradable resin.
【００１４】澱粉：生分解性樹脂（重量比率）は、１０
０：０〜５０：５０の範囲であることが好ましい。澱粉
の配合比率が５０％未満だと樹脂が主成分になり、プラ
スチックに類別されコスト的にも高くなるので好ましく
ない。Starch: biodegradable resin (weight ratio) is 10
It is preferably in the range of 0: 0 to 50:50. If the blending ratio of the starch is less than 50%, the resin is the main component, which is classified as a plastic, and the cost is high.
【００１５】本発明の組成物は、上記成分に加えて、故
紙を含有することができる。故紙を含有させることで、
紙の風合いを加味すると共に、パルプモールドと同じ物
性を付与することができるという利点がある。故紙は、
回収された紙製品のいずれであっても良いが、好ましく
は、微粉末故紙を用いる。微粉末故紙としては、例え
ば、長軸方向の繊維長が０．２〜１ｍｍのものを挙げる
ことができる。微粉末の故紙を用いることで、成型時の
流動性を改善することができる。微粉末の故紙は、故紙
を粉砕または研磨等することにより製造することができ
る。また、微粉末故紙は、例えば、製本の研磨時に出る
紙粉を挙げることができ、製本の研磨時に出る紙粉の使
用は最も経済的である。勿論通常の故紙を微粉砕して、
これを微粉末故紙として使用することも出来る。The composition of the present invention can contain waste paper in addition to the above components. By including waste paper,
There is an advantage that the same physical properties as the pulp mold can be imparted while taking the texture of the paper into consideration. Waste paper is
Although any of the collected paper products may be used, preferably, fine powder waste paper is used. Examples of the fine powder waste paper include those having a fiber length of 0.2 to 1 mm in the major axis direction. Use of fine powder wastepaper can improve the fluidity during molding. Fine powder waste paper can be produced by grinding or polishing the waste paper. Examples of the finely powdered waste paper include paper dust generated during bookbinding polishing, and the use of paper powder generated during bookbinding polishing is most economical. Of course, finely ground ordinary waste paper,
This can be used as fine powder waste paper.
【００１６】澱粉又は澱粉及び生分解性樹脂:微粉末故
紙(重量比率)は、８０:２０〜５０:５０の範囲であるこ
とが好ましい。パルプモールドのように紙の風合いを有
するシートを作成する場合、故紙の重量比率を５０％以
上とすることが適当である。しかし、故紙の重量比率が
８０％を超えると極端に成形が難しくなり、安定操業が
出来なくなる傾向がある。The starch or starch and biodegradable resin: fine powder waste paper (weight ratio) is preferably in the range of 80:20 to 50:50. When a sheet having a paper texture like a pulp mold is prepared, it is appropriate that the weight ratio of the waste paper is 50% or more. However, if the weight ratio of the waste paper exceeds 80%, molding becomes extremely difficult, and stable operation tends to be impossible.
【００１７】本発明の組成物及び成形体は、上記澱粉、
生分解性樹脂、微粉末故紙及び澱粉用可塑剤以外に、必
要により、本発明の材料の物性を損なわない範囲で、公
知の添加剤を含むこともできる。そのような添加剤とし
ては、例えば、安定剤、紫外線吸収剤、帯電防止剤、殺
菌剤、酸化防止剤、界面活性剤、架橋剤、滑剤等を挙げ
ることができる。The composition and the molded article of the present invention comprise the above-mentioned starch,
In addition to the biodegradable resin, the finely powdered waste paper and the plasticizer for starch, known additives may be contained as needed, as long as the physical properties of the material of the present invention are not impaired. Examples of such additives include a stabilizer, an ultraviolet absorber, an antistatic agent, a bactericide, an antioxidant, a surfactant, a crosslinking agent, and a lubricant.
【００１８】本発明の組成物は、上記澱粉、生分解性樹
脂、微粉末故紙及び澱粉用可塑剤等の原料を加熱溶融
し、混合することで製造される。加熱溶融・混合は、６
０〜２２０℃の温度範囲で、押出機を使用する場合には
数十秒〜数分、加圧ニーダーを使用する場合には10〜60
分間加熱し混合することで行える。加熱溶融し、混合し
た後、適当な形状及び大きさの粉末状、粒状またはペレ
ット状にすることができる。さらに、上記粉末状、粒状
またはペレット状の組成物を用いて、シート状あるいは
育苗用のポット等の成形体を形成することができる。こ
のような成形体は、例えば、上記組成物を射出成形、押
出し成形またはブロー成形等の公知の方法により成形す
ることで得ることができる。The composition of the present invention is produced by heating and melting the raw materials such as the above-mentioned starch, biodegradable resin, fine powder waste paper and starch plasticizer, and mixing. Heat melting / mixing is 6
In the temperature range of 0 to 220 ° C., several tens of seconds to several minutes when using an extruder, and 10 to 60 when using a pressure kneader.
This can be done by heating and mixing for minutes. After being heated and melted and mixed, it can be formed into powder, granules or pellets having an appropriate shape and size. Further, a molded product such as a sheet or a pot for raising seedlings can be formed by using the powdery, granular or pelletized composition. Such a molded article can be obtained, for example, by molding the composition by a known method such as injection molding, extrusion molding or blow molding.
【００１９】[0019]
【実施例】以下、実施例に基ついて本発明を更に説明す
る。EXAMPLES The present invention will be further described below with reference to examples.
【００２０】実施例１ コーンスターチ（水分１３％）１００部、メタブレンＰ
５３０Ａ（三菱レーヨン製、メタクリル酸メチル、アク
リル酸アルキル共重合物、分子量３１０万）１部、水３
０部をヘンシェルミキサー（三井三池化工機製）で１０
００ｒｐｍ、１０分間混合した後、試験用押出機（東洋
精機製ラボプラストミル）にて１００℃でペレット化し
た。これを水分１３．５％まで乾燥し、このペレットを
使ってバラ状緩衝材製造設備にて１９０℃で発泡体を形
成した。Example 1 100 parts of corn starch (13% moisture), Metablen P
530A (Mitsubishi Rayon, methyl methacrylate, alkyl acrylate copolymer, molecular weight 3.1 million) 1 part, water 3
0 parts with a Henschel mixer (Mitsui Miike Kakoki) 10
After mixing at 00 rpm for 10 minutes, the mixture was pelletized at 100 ° C. using a test extruder (Laboplast Mill manufactured by Toyo Seiki). This was dried to a water content of 13.5%, and a foam was formed using the pellets at 190 ° C. in a rose-shaped buffer material manufacturing facility.
【００２１】実施例２ コーンスターチ（水分１３％）８０部、ジアセチルセル
ロース（帝人製）２０部、メタブレンＰ５３０Ａ（三菱
レーヨン製メタクリル酸メチル、アクリル酸アルキル共
重合物、分子量３１０万）０．５部、水４０部をヘンシ
ェルミキサーで混合し、得られた混合物を直接２軸押し
出し機にかけ、１９０℃で発泡体を形成した。Example 2 80 parts of corn starch (13% moisture), 20 parts of diacetyl cellulose (manufactured by Teijin), 0.5 part of Metablen P530A (manufactured by Mitsubishi Rayon, methyl methacrylate, alkyl acrylate copolymer, molecular weight 3.1 million), Forty parts of water were mixed with a Henschel mixer, and the resulting mixture was directly subjected to a twin-screw extruder to form a foam at 190 ° C.
【００２２】比較例１ 実施例１の配合組成中、メタブレンＰ５３０Ａだけを除
いて実施例１と全く同じ条件で発泡体を形成した。Comparative Example 1 A foam was formed under the same conditions as in Example 1 except that only Metablen P530A was added to the composition of Example 1.
【００２３】比較例２ 実施例２の配合組成中、メタブレンＰ５３０Ａだけを除
いて実施例２と全く同じ条件で発泡体を形成した。Comparative Example 2 A foam was formed under the same conditions as in Example 2 except that only Metablen P530A was used in the composition of Example 2.
【００２４】バラ状緩衝材(発泡体)の物性試験結果を表
1に示す。発泡性は、発泡体の電子顕微鏡写真から発泡
体の気泡セルの大きさがほぼ同じ大きさである場合を
「均一発泡」と評価し、気泡セルの大きさにバラツキ
(大きさが2倍以上違うものがある場合)を「不均一発
泡」と評価した。硬さ及び復元性は山電（株）製レオメ
ーターにて、楔型プランジャーを用い緩衝材(発泡体)を
８０％歪みになるまで速度１０mm/minで圧縮後、緩和し
更に圧縮、緩和して測定した。発泡体径は、ノギスにて
直径を測定し、10回の測定値の平均である。吸湿性は、
緩衝材(発泡体)を２０℃、３５％RHで７日間保存後の重
量変化から測定した。吸水率は、緩衝材(発泡体)を水に
浮かべ２４時間攪拌後、緩衝材(発泡体)の吸水重量から
算出した。The results of the physical property test of the loose cushioning material (foam) are shown in the table.
Shown in 1. Foamability is evaluated as "uniform foaming" when the cell size of the foam is almost the same from the electron micrograph of the foam, and the size of the cell varies.
(If there is a difference of more than twice in size) was evaluated as "uneven foaming". The hardness and resilience were measured by using a wedge-shaped plunger with a wedge-shaped plunger at a rate of 10 mm / min until the strain became 80%, then relaxed and further compressed and relaxed. And measured. The foam diameter is an average of 10 measurements obtained by measuring the diameter with a vernier caliper. Hygroscopicity is
The buffer material (foam) was measured from the weight change after storage at 20 ° C. and 35% RH for 7 days. The water absorption was calculated from the water absorption weight of the buffer (foam) after floating the buffer (foam) in water and stirring for 24 hours.
【００２５】[0025]
【表１】 [Table 1]
【００２６】表１に示すように実施例１及び２の緩衝材
(発泡体)は、均一な発泡が得られているとともに、復元
力、発泡性、吸湿性、耐水性等の物性が比較例１，２に
比べて優れていた。特に吸湿性の結果は、低湿度に放置
しても緩衝材の水分が低下しないことを示している。冬
場に乾燥すると発泡体から水分が蒸発し、発泡体中の平
衡水分が失われ、その結果、柔軟性が乏しくなるとい
う、低湿度による復元性低下の問題も、本発明の成形体
(組成物)では生じないことを示唆している。また実施例
１及び２では、発泡体製造時のトルク変動が少なくしか
もその値が低かったのに比べ、比較例１及び２ではトル
ク変動も激しくかつ負荷も高く生産性が悪かった。即
ち、本発明の組成物を用いることで、発泡体製造時のト
ルク変動が少なく、一定の大きさの発泡体を安定的に製
造することが可能になる。それに対して、トルク変動が
激しくなると、発泡体の形状や大きさが一定せず、着色
の問題も生じる。As shown in Table 1, the cushioning materials of Examples 1 and 2
(Foam) had uniform foaming and was excellent in physical properties such as restoring force, foaming property, moisture absorption and water resistance as compared with Comparative Examples 1 and 2. In particular, the results of the hygroscopicity indicate that the water content of the buffer material does not decrease even when left at low humidity. Moisture evaporates from the foam when dried in the winter, the equilibrium moisture in the foam is lost, and as a result, the flexibility is poor.
(Composition) does not occur. Further, in Examples 1 and 2, the torque fluctuation during the production of the foam was small and the value was low, whereas in Comparative Examples 1 and 2, the torque fluctuation was severe, the load was high, and the productivity was poor. That is, the use of the composition of the present invention makes it possible to stably produce a foam having a fixed size with little torque fluctuation during the production of the foam. On the other hand, when the torque fluctuates greatly, the shape and size of the foam are not constant, and a problem of coloring occurs.
【００２７】実施例３ コ-ンスターチ（水分１３％）４０部、ビオノーレ＃３
００１（昭和高分子製）１０部、微粉末故紙（繊維長
０．２mm）５０部、メタブレンＰ５３１（三菱レーヨン
製、メタクリル酸メチル、アクリル酸アルキル共重合
物、分子量４１０万）０．５部、グリセリン４０部をヘ
ンシェルミキサーで１０００rpm、１０分間混合した
後、試験用押出機にて１５０℃でペレット化した。得ら
れたペレットを島津製作所（株）製フローテスターにて
直径１mm、長さ２mmのダイスを用い、５０ｋｇｆの荷重
下で５０℃より５℃／minの昇温速度で昇温させながら
熱軟化及び熱流動性を測定した。更に日精樹脂工業製射
出成形機（８０T）にてMAX１６０℃、肉圧０．５〜１mm
の条件で苗ポットを作成した。Example 3 Corn starch (13% moisture), 40 parts, Bionole # 3
001 (manufactured by Showa Polymer), 50 parts of fine powder waste paper (fiber length 0.2 mm), 0.5 part of Metablen P531 (manufactured by Mitsubishi Rayon, methyl methacrylate, alkyl acrylate copolymer, molecular weight 4.1 million), After mixing 40 parts of glycerin with a Henschel mixer at 1000 rpm for 10 minutes, the mixture was pelletized at 150 ° C. with a test extruder. The resulting pellets were subjected to thermal softening and heat softening while raising the temperature at a rate of 5 ° C./min from 50 ° C. under a load of 50 kgf using a flow tester manufactured by Shimadzu Corporation with a die having a diameter of 1 mm and a length of 2 mm. The thermal fluidity was measured. Further, using an injection molding machine (80T) manufactured by Nissei Plastic Industry, MAX160 ° C, meat pressure 0.5-1mm
A seedling pot was prepared under the following conditions.
【００２８】比較例３ 実施例３の配合組成中、メタブレンＰ５３１だけを除い
て後は実施例３と全く同じ条件でペレットを作成し、さ
らにこのペレットを用いて苗ポットを得た。Comparative Example 3 A pellet was prepared under exactly the same conditions as in Example 3 except that only Metablen P531 was added to the composition of Example 3, and a seedling pot was obtained using the pellet.
【００２９】[0029]
【表２】 [Table 2]
【００３０】表２に示すように、実施例3と比較例3とで
は、フローテスター試験における熱軟化、熱流動性温度
は変わらない。しかし、実施例3の組成物を使用して射
出成形による苗ポットを試作した場合、離型性に優れる
のに対して、比較例3の組成物では、離型性に問題があ
った。また、実施例3の組成物を使用して成形した苗ポ
ットは、水中に24時間浸漬後も形状や機械的性質が浸漬
前とほぼ同じであり、耐水性に優れていた。それに対し
て、比較例3の組成物を使用して成形した苗ポットは、
約半数が水に溶けて形状が変化していた。さらに、実施
例3の組成物を使用して成形した苗ポットは、コシが強
く、程よい硬さと柔軟性があるのに対して、比較例3の
組成物を使用して成形した苗ポットは、コシがなく脆い
ものであった。As shown in Table 2, in Example 3 and Comparative Example 3, the heat softening and the heat fluidity temperature in the flow tester test did not change. However, when a seedling pot was produced by injection molding using the composition of Example 3 as a trial, the mold releasability was excellent, whereas the composition of Comparative Example 3 had a problem with the mold releasability. The seedling pot formed using the composition of Example 3 was almost the same in shape and mechanical properties even after immersion in water for 24 hours, and was excellent in water resistance. In contrast, seedling pots formed using the composition of Comparative Example 3,
About half were dissolved in water and changed shape. Furthermore, the seedling pot molded using the composition of Example 3, while the stiffness is strong, moderate hardness and flexibility, while the seedling pot molded using the composition of Comparative Example 3, It was brittle without stiffness.
【００３１】実施例４ コーンスターチ１００部にエチレングリコール４０部、
メタブレンＰ５３０Ａ１．４部を加え、ヘンシェルミキ
サーで１０００ｒｐｍ、１０分間混合した後、試験用押
し出し機にて１５０℃でペレット化した。この可塑化澱
粉１００部、ビオノーレ＃１００１ １００部をタンブ
ラー混合した後、１５０℃で再度押出機にかけ可塑化澱
粉・ビオノーレ複合体組成物を得た。この組成物を用い
て加熱温度１７０℃の条件下Tダイ押し出し機で肉圧１m
mのシートを形成した。Example 4 100 parts of corn starch, 40 parts of ethylene glycol,
After adding 1.4 parts of METABLEN P530A and mixing with a Henschel mixer at 1000 rpm for 10 minutes, the mixture was pelletized at 150 ° C. with a test extruder. After 100 parts of the plasticized starch and 100 parts of Bionole # 1001 were tumbled and mixed, the mixture was extruded again at 150 ° C. to obtain a plasticized starch / bionole composite composition. Using this composition, at a heating temperature of 170 ° C, a T-die extruder was used to obtain a meat pressure of 1 m.
m sheets were formed.
【００３２】比較例４ メタブレンＰ５３０Ａを配合しない以外は実施例４と同
様の方法でペレットを作成し、さらにシートを形成し
た。Comparative Example 4 A pellet was prepared in the same manner as in Example 4 except that METABLEN P530A was not blended, and a sheet was further formed.
【００３３】実施例4及び比較例4のシートを用いて苗ポ
ットの真空成形を試みた。その結果、比較例４のシート
の場合、シートが真空成形用の加熱エリアに入ってきた
時、下に垂れ下がってしまい成形できなかった。それに
対し実施例４のシートの場合、このような垂れ下り(ド
ローダウン)現象は見られず、奇麗な成形品(苗ポット)
を得ることが出来た。Using the sheets of Example 4 and Comparative Example 4, vacuum molding of a seedling pot was attempted. As a result, in the case of the sheet of Comparative Example 4, when the sheet entered the heating area for vacuum forming, it fell down and could not be formed. On the other hand, in the case of the sheet of Example 4, such a sagging (drawdown) phenomenon was not observed, and a beautiful molded product (seedling pot) was used.
Was obtained.
【００３４】[0034]
【発明の効果】本発明によれば、一定以上の機械的性質
を保持した澱粉を主成分とする生分解性組成物を提供す
ることができる。さらに本発明によれば、成形加工性が
改善された澱粉と生分解性樹脂を複合した組成物を提供
することができる。加えて本発明によれば、発泡状態が
均一で、かつ高い強度を有する、澱粉を主成分とする生
分解性組成物または澱粉と生分解性樹脂を複合した組成
物からなる発泡体を提供することができる。According to the present invention, it is possible to provide a biodegradable composition containing starch as a main component and having a certain level of mechanical properties. Further, according to the present invention, it is possible to provide a composition comprising a starch and a biodegradable resin having improved moldability. In addition, according to the present invention, there is provided a foam composed of a biodegradable composition containing starch as a main component or a composition in which starch is combined with a biodegradable resin, having a uniform foaming state and high strength. be able to.
───────────────────────────────────────────────────── 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） Ｃ０８Ｌ 33/06 Ｃ０８Ｌ 33/06 101/16 101/16 Ｆターム(参考） 4F071 AA08 AA09 AA29 AA33 AA43 AA44 AA51 AC05 AE04 AE17 AF52 AH04 BA01 BB05 BB06 BC01 BC04 4F074 AA02 AA03 AA42 AA48 AA66 AA68 AD04 CB91 CC22X DA23 DA24 DA33 4J002 AB014 AB022 AB041 AB051 BE022 BG043 BG053 CF182 CF192 CH024 CP032 EC046 EC056 ED036 FD014 FD024 FD026 GG00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08L 33/06 C08L 33/06 101/16 101/16 F-term (Reference) 4F071 AA08 AA09 AA29 AA33 AA43 AA44 AA51 AC05 AE04 AE17 AF52 AH04 BA01 BB05 BB06 BC01 BC04 4F074 AA02 AA03 AA42 AA48 AA66 AA68 AD04 CB91 CC22X DA23 DA24 DA33 4J002 AB014 AB022 AB041 AB051 BE022 BG043 BG053 CF182 CF192 CH024 CP032 EC046 EC56 EC056
Claims (10)
改質剤、または澱粉、澱粉用可塑剤、アクリル系樹脂改
質剤及び生分解性樹脂からなり、澱粉または澱粉及び生
分解性樹脂１００重量部に対して０．０１〜５重量部の
アクリル系樹脂改質剤及び１０〜 ５０重量部の澱粉用
可塑剤を含有する組成物。1. A starch comprising a starch, a starch plasticizer and an acrylic resin modifier, or a starch, a starch plasticizer, an acrylic resin modifier and a biodegradable resin. A composition containing 0.01 to 5 parts by weight of an acrylic resin modifier and 10 to 50 parts by weight of a starch plasticizer based on parts by weight.
チル−アクリル酸アルキル共重合体またはメタクリル酸
メチル−アクリル酸アルキル共重合体を主成分として含
むものである請求項１に記載の組成物。2. The composition according to claim 1, wherein the acrylic resin modifier contains a methyl methacrylate-alkyl acrylate copolymer or a methyl methacrylate-alkyl acrylate copolymer as a main component.
０：０〜５０：５０の範囲である請求項１又は２に記載
の組成物。3. A starch: biodegradable resin (weight ratio) of 10
The composition according to claim 1, wherein the composition is in the range of 0: 0 to 50:50.
３のいずれか１項に記載の組成物。4. The composition according to claim 1, further comprising fine powder waste paper.
4. The composition according to any one of the above items 3.
（澱粉及び生分解性樹脂）：微粉末故紙（重量比率）が
２０：８０〜５０：５０の範囲である請求項４に記載の
組成物。5. The composition according to claim 4, wherein the starch: fine powder waste paper (weight ratio) or (starch and biodegradable resin): fine powder waste paper (weight ratio) is in the range of 20:80 to 50:50. object.
性樹脂及び微粉末故紙１００重量部に対して０．０１〜
５重量部のアクリル系樹脂改質剤及び１０〜 ５０重量
部の澱粉用可塑剤を含有する請求項４又は５に記載の組
成物。6. 0.01 to 100 parts by weight of starch and fine powder waste paper or starch, biodegradable resin and fine powder waste paper.
The composition according to claim 4 or 5, comprising 5 parts by weight of an acrylic resin modifier and 10 to 50 parts by weight of a starch plasticizer.
成物からなる成形体。7. A molded article comprising the composition according to any one of claims 1 to 6.
はフィルム成形によって成形されたものである請求項７に記
載の成形物。8. The molded article according to claim 7, which is formed by injection molding, extrusion molding, blow molding or film molding.
成形体。9. The molded article according to claim 7, which is a foam.
泡体である請求項９に記載の成形物。10. The molded article according to claim 9, which is a loose cushioning material, a foamed sheet or a molded foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090515A JP2001279018A (en) | 2000-03-29 | 2000-03-29 | Starch-based biodegradable resin composition and its molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090515A JP2001279018A (en) | 2000-03-29 | 2000-03-29 | Starch-based biodegradable resin composition and its molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001279018A true JP2001279018A (en) | 2001-10-10 |
Family
ID=18606116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000090515A Withdrawn JP2001279018A (en) | 2000-03-29 | 2000-03-29 | Starch-based biodegradable resin composition and its molded product |
Country Status (1)
| Country | Link |
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| JP (1) | JP2001279018A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006123608A1 (en) * | 2005-05-16 | 2006-11-23 | Mitsubishi Rayon Co., Ltd. | Thermoplastic resin composition |
| JP2007091953A (en) * | 2005-09-29 | 2007-04-12 | Toshiba Corp | Foaming material composition, foam and method for regenerating foam |
| JP2007262189A (en) * | 2006-03-28 | 2007-10-11 | Achilles Corp | Biodegradable film or sheet |
| JP2008231284A (en) * | 2007-03-22 | 2008-10-02 | Toray Ind Inc | Polylactic acid foam and method for producing the same |
| WO2009041017A1 (en) * | 2007-09-26 | 2009-04-02 | Kaneka Corporation | Resin composition |
| JP2009120651A (en) * | 2007-11-12 | 2009-06-04 | Showa Highpolymer Co Ltd | Resin composition |
| JP2009524726A (en) * | 2006-01-27 | 2009-07-02 | アーケマ・インコーポレイテッド | Blends of biopolymers and acrylic copolymers |
-
2000
- 2000-03-29 JP JP2000090515A patent/JP2001279018A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006123608A1 (en) * | 2005-05-16 | 2006-11-23 | Mitsubishi Rayon Co., Ltd. | Thermoplastic resin composition |
| JP2007091953A (en) * | 2005-09-29 | 2007-04-12 | Toshiba Corp | Foaming material composition, foam and method for regenerating foam |
| JP2009524726A (en) * | 2006-01-27 | 2009-07-02 | アーケマ・インコーポレイテッド | Blends of biopolymers and acrylic copolymers |
| JP2007262189A (en) * | 2006-03-28 | 2007-10-11 | Achilles Corp | Biodegradable film or sheet |
| JP2008231284A (en) * | 2007-03-22 | 2008-10-02 | Toray Ind Inc | Polylactic acid foam and method for producing the same |
| WO2009041017A1 (en) * | 2007-09-26 | 2009-04-02 | Kaneka Corporation | Resin composition |
| JP2009120651A (en) * | 2007-11-12 | 2009-06-04 | Showa Highpolymer Co Ltd | Resin composition |
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