JP2001139726A - Biodegradable resin composition containing cellulose acetate - Google Patents
Biodegradable resin composition containing cellulose acetateInfo
- Publication number
- JP2001139726A JP2001139726A JP32424999A JP32424999A JP2001139726A JP 2001139726 A JP2001139726 A JP 2001139726A JP 32424999 A JP32424999 A JP 32424999A JP 32424999 A JP32424999 A JP 32424999A JP 2001139726 A JP2001139726 A JP 2001139726A
- Authority
- JP
- Japan
- Prior art keywords
- cellulose acetate
- biodegradable resin
- resin composition
- composition containing
- containing cellulose
- 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.)
- Pending
Links
Landscapes
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、生分解性樹脂組
成物に関し、たとえば建材やプラスチック成形物等に利
用できる生分解性樹脂組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biodegradable resin composition, and more particularly to a biodegradable resin composition which can be used for building materials and molded plastics.
【０００２】[0002]
【従来の技術】従来から、建材やプラスチック成形物等
には合成樹脂が多く用いられている。2. Description of the Related Art Conventionally, synthetic resins are often used for building materials and plastic molded products.
【０００３】しかしながら、合成樹脂は自然界において
崩壊しにくく、また近年問題となっているホルムアルデ
ヒド等の発生原因の一つとして疑われているものもあ
る。また、日用品・家具等に使用される合成樹脂製品
は、使用後ゴミとして廃棄され、焼却すると高温になり
焼却炉を損傷したり、ダイオキシンの発生問題をおこす
ものもある。また埋立地等に投棄すれば、藁や木綿等の
天然物とは異なり、微生物により分解されることなく、
何時までも嵩高のまま残って、その土地の植物の生育に
支障を来すとともに、地盤の安定化を損ない、また、時
として、鳥や野性動物や魚等に誤食され、これらの動物
の健康をそこなう等の問題が発生していた。However, there are some synthetic resins which are hard to disintegrate in the natural world and are suspected as one of the causes of the generation of formaldehyde and the like, which has recently become a problem. Also, synthetic resin products used for daily necessities and furniture are discarded as garbage after use, and when incinerated, the temperature becomes high, which may cause damage to the incinerator or cause dioxin generation. Also, if dumped in landfills, unlike natural products such as straw and cotton, they will not be decomposed by microorganisms,
They remain bulky for a long time, hindering the growth of local plants, impairing the stability of the ground, and sometimes being eaten by birds, wild animals, fish, etc. Problems such as loss of health had occurred.
【０００４】そこで、近年、環境にやさしく、人間の体
に影響を与えない生分解性プラスチックの開発が進めら
れている。これまで生分解性プラスチックについて多数
の発明がなされてきたが、その一つに、とうもろこし等
の澱粉にポリエチレンやポリプロピレン等を混入したプ
ラスチックがあり、たとえば、特開平７−２５８４５３
号公報に開示された熱可塑性澱粉と熱可塑性ポリマーと
からなる生分解性プラスチック等があげられる。このよ
うな澱粉含有プラスチックは、土壌中に廃棄されると、
混入された澱粉の部分だけが微生物によって分解され、
それによってプラスチックが多孔質化されて表面積が増
え、それによって合成樹脂成分も風化作用等を受け易く
なると考えられているものであり、狭義には、生崩壊性
樹脂と呼ばれているものである。Therefore, in recent years, the development of a biodegradable plastic that is environmentally friendly and does not affect the human body has been promoted. Many inventions have been made on biodegradable plastics so far, one of which is a plastic in which polyethylene, polypropylene or the like is mixed in starch such as corn.
And a biodegradable plastic composed of a thermoplastic starch and a thermoplastic polymer disclosed in Japanese Patent Application Laid-Open No. H10-260,086. When such starch-containing plastics are disposed of in soil,
Only the portion of the starch that is mixed is broken down by microorganisms,
It is thought that plastic is made porous and the surface area increases, thereby making the synthetic resin component more susceptible to weathering and the like. In a narrow sense, it is called a biodegradable resin. .
【０００５】しかしながら、従来の澱粉含有プラスチッ
クは、いずれも、耐水性や耐湿性に乏しいという欠点が
ある。そのため、梱包用の緩衝用発泡体として使用する
場合等には、ポリエチレンフィルム等で作った防湿用の
袋に入れて使用することが必要であり、袋への挿入、袋
の破れに対する注意や点検、使用後の袋の廃棄等の面倒
な作業があった。また、梱包品が全く濡れるおそれがな
い場合でも、緩衝用発泡体を、家電製品や機械部品の梱
包にそのまま使用すれば、空気中の湿度を吸収して発泡
体がへたり、収納した物品との間に隙間ができて、緩衝
材としての機能が損なわれる問題があった。さらに、果
物や野菜の梱包に使用すれば、果物や野菜の水分を吸収
して発泡体が泥状化し、緩衝材としての機能が全くなく
なる等の、問題が生じる。However, all of the conventional starch-containing plastics have a disadvantage that they are poor in water resistance and moisture resistance. Therefore, when it is used as a cushioning foam for packing, it is necessary to use it in a moisture-proof bag made of polyethylene film, etc. And troublesome work such as disposal of bags after use. Even when there is no danger of the package being wet at all, if the foam for cushioning is used as it is for packaging home appliances and machine parts, it absorbs the humidity in the air, and the foam may fall off or be removed from the stored goods. There is a problem that a gap is formed between them and the function as a cushioning material is impaired. Further, when used for packing fruits and vegetables, there are problems such as absorption of moisture of the fruits and vegetables, muddy of the foam, and loss of function as a cushioning material at all.
【０００６】一方、特開平１０−７２５３５号公報に
は、澱粉、ポリビニールアルコール、および、脂肪族ポ
リエステルまたはポリプロピレンからなる耐湿性の生分
解性樹脂発泡体が開示されている。しかし、この生分解
性樹脂発泡体は、従来のポリスチレン樹脂発泡体に比べ
ると、耐水性が著しく劣り、弾性や耐圧縮性において劣
るという問題があった。On the other hand, Japanese Patent Application Laid-Open No. 10-72535 discloses a moisture-resistant biodegradable resin foam made of starch, polyvinyl alcohol, and aliphatic polyester or polypropylene. However, this biodegradable resin foam has a problem that water resistance is remarkably inferior and elasticity and compression resistance are inferior to conventional polystyrene resin foam.
【０００７】また、ポリ乳酸を生分解性樹脂として使用
する提案もあるが、ポリ乳酸は生分解する酵素が少な
く、必ずしも地球環境に優しい樹脂とはいえない。There is also a proposal to use polylactic acid as a biodegradable resin. However, polylactic acid has a small amount of biodegradable enzymes and is not necessarily a resin that is friendly to the global environment.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、前記従来の
問題を解決するため、安全性、耐水性、緻密性、加工
性、生分解性に優れ、木材調の手触りを出せる生分解性
樹脂組成物を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems by providing a biodegradable resin which is excellent in safety, water resistance, denseness, workability, and biodegradability and has a wood-like touch. It is intended to provide a composition.
【０００９】[0009]
【課題を解決するための手段】前記目的を達成するた
め、本発明の生分解樹脂組成物は、酢酸セルロースを含
む生分解樹脂組成物であって、酢酸セルロース１００重
量部に対して、木粉末を１０〜１２５重量部含むことを
特徴とする。In order to achieve the above object, a biodegradable resin composition of the present invention is a biodegradable resin composition containing cellulose acetate, wherein 100 parts by weight of cellulose acetate is mixed with wood powder. Is contained in an amount of 10 to 125 parts by weight.
【００１０】前記組成物においては、酢酸セルロース１
００重量部に対して、さらに滑剤を０．１〜１．０重量
部含むことが好ましい。In the above composition, cellulose acetate 1
It is preferable that the lubricant further contains 0.1 to 1.0 part by weight with respect to 00 parts by weight.
【００１１】また前記組成物においては、酢酸セルロー
ス１００重量部に対して、さらに可塑剤を１０〜３０重
量部含むことが好ましい。It is preferable that the composition further contains 10 to 30 parts by weight of a plasticizer based on 100 parts by weight of cellulose acetate.
【００１２】また前記組成物においては、酢酸セルロー
スが酢化度５２〜５６％のジアセテートであることが好
ましい。例えば酢酸の置換度が約２．４程度の酢酸セル
ロースが好ましい。In the above composition, the cellulose acetate is preferably diacetate having an acetylation degree of 52 to 56%. For example, cellulose acetate having a degree of substitution of acetic acid of about 2.4 is preferable.
【００１３】また前記組成物においては、木粉末が５０
〜２００メッシュの範囲の粉末であることが好ましい。[0013] In the above composition, the wood powder contains 50
It is preferred that the powder has a size in the range of ~ 200 mesh.
【００１４】前記組成物は、フレーク状の酢酸セルロー
スに対し、所定割合の木粉末と、必要に応じて滑剤、可
塑剤及び／又は着色剤などを加えて押出機により混練押
出することによりペレットにする。The above-mentioned composition is prepared by adding a predetermined ratio of wood powder and, if necessary, a lubricant, a plasticizer and / or a coloring agent to flaky cellulose acetate and kneading and extruding the mixture with an extruder to form pellets. I do.
【００１５】[0015]
【発明の実施の形態】本発明で好適に使用できる酢酸セ
ルロースは、下記の化学式（化１）で示されるセルロー
スの化学構造の水酸基の一部が酢酸と置換したものであ
る。BEST MODE FOR CARRYING OUT THE INVENTION Cellulose acetate which can be suitably used in the present invention is one in which a part of the hydroxyl groups in the chemical structure of cellulose represented by the following chemical formula (Formula 1) is substituted with acetic acid.
【００１６】[0016]
【化１】 Embedded image
【００１７】このもの自体は帝人社の「アセテートフレ
ークス」、ダイセル社の「酢酸セルロース」という商品
名で市販されている。いずれもフレーク状のものであ
る。The product itself is commercially available under the trade names "Acetate Flakes" of Teijin Limited and "Cellulose Acetate" of Daicel Corporation. Each is in the form of flakes.
【００１８】前記酢酸セルロースのフレークを粉砕して
微粉末にし、これに例えばステアリン酸またはその塩か
らなる滑剤を加え、さらにフタル酸ジブチル（ＤＢ
Ｐ），フタル酸ジエチルヘキシル（ＤＥＰ）等の可塑剤
溶液を含浸させ、必要に応じて着色剤などの添加剤を加
えて、さらに所定量の木粉末を加えて押出機により混練
押出し、ペレット化する。前記ペレットは通常の方法で
成形される。もちろん前記の押出機から直接成形しても
良い。押出機は２軸押出機を用いるのが好ましく、混練
の温度は、例えば１８０〜１９０℃の範囲が好ましい。The cellulose acetate flakes are pulverized to a fine powder, to which a lubricant comprising, for example, stearic acid or a salt thereof is added, and further, dibutyl phthalate (DB) is added.
P), a plasticizer solution such as diethylhexyl phthalate (DEP) is impregnated, additives such as a coloring agent are added if necessary, a predetermined amount of wood powder is further added, and the mixture is kneaded and extruded by an extruder to form pellets. I do. The pellet is formed by a usual method. Of course, you may shape | mold directly from the said extruder. The extruder is preferably a twin-screw extruder, and the kneading temperature is preferably in the range of, for example, 180 to 190 ° C.
【００１９】成形体は、プレート、棒、柱、シートな
ど、木材や通常のプラスチックが用いられている用途で
あればどのようなものでも良い。The molded product may be any material, such as a plate, a bar, a column, a sheet, etc., as long as it is made of wood or ordinary plastic.
【００２０】得られた成形体はそのまま使用しても良い
し、表面に着色アセトン溶液を塗布して、木材表面のよ
うな着色模様を形成しても良い。The obtained molded body may be used as it is, or a colored acetone solution may be applied to the surface to form a colored pattern such as a wood surface.
【００２１】さらに難燃加工する際は、ハロゲン含有化
合物、リン含有化合物、アンチモン含有化合物など、公
知のいかなる難燃剤を加えても良い。難燃剤を含む塗料
を塗布しても良い。このようにして建材等で要求される
難燃性を付与できる。For further flame retarding, any known flame retardant such as a halogen-containing compound, a phosphorus-containing compound and an antimony-containing compound may be added. A paint containing a flame retardant may be applied. In this way, the flame retardancy required for building materials and the like can be provided.
【００２２】[0022]
【実施例】以下実施例を用いて本発明をさらに具体的に
説明する。本発明は下記の実施例に限定されるものでは
ない。The present invention will be described more specifically with reference to the following examples. The present invention is not limited to the following examples.
【００２３】（実施例１）酢酸セルロースフレーク（帝
人株式会社製、酢化度５２〜５６％、酢酸の置換度が約
２．４程度）：１０．０ｋｇと、木粉末（１００メッシ
ュ通過品）：２．０ｋｇと、可塑剤フタル酸ジエチルヘ
キシル（ＤＥＰ）：１．５ｋｇと、可塑剤フタル酸ジブ
チル（ＤＢＰ）：１．０ｋｇと、滑剤（ステアリン
酸）：０．０２ｋｇを原料として用いた。(Example 1) Cellulose acetate flakes (manufactured by Teijin Limited, acetylation degree: 52-56%, degree of acetic acid substitution: about 2.4): 10.0 kg, wood powder (100 mesh-passed product) : 2.0 kg, plasticizer diethylhexyl phthalate (DEP): 1.5 kg, plasticizer dibutyl phthalate (DBP): 1.0 kg, and lubricant (stearic acid): 0.02 kg were used as raw materials.
【００２４】まず、前記酢酸セルロースのフレークを粉
砕して微粉末にし、これにステアリン酸を加え、さらに
ＤＢＰとＤＥＰの可塑剤混合溶液を含浸させ、さらに木
粉末を加えて２軸押出機により１８０〜１９０℃で混練
押出し、ペレット化した。First, the cellulose acetate flakes are pulverized to a fine powder, to which stearic acid is added, a plasticizer mixed solution of DBP and DEP is further impregnated, and wood powder is further added. The mixture was kneaded at １９０190 ° C., extruded and pelletized.
【００２５】得られたペレットを射出成形機を用いて、
長さ６０ｃｍ、幅２０ｃｍ、厚さ５ｍｍのプレートを成
形した。このものは、木材調の手触りを出すことができ
た。また、安全性、耐水性、緻密性、加工性、生分解性
に優れていた。The obtained pellets are obtained by using an injection molding machine.
A plate having a length of 60 cm, a width of 20 cm and a thickness of 5 mm was formed. It was able to give a woody feel. In addition, it was excellent in safety, water resistance, denseness, processability, and biodegradability.
【００２６】また得られたプレートの１０平方ｃｍの試
験片を室温の水および６０℃の温水に浸した前後の変化
を調べたが、なんら形状や物性の変化は見られなかっ
た。前記プレートの酢酸臭は全くしなかった。A change in the shape of the test piece before and after immersing the test piece of 10 square cm of the obtained plate in water at room temperature and hot water at 60 ° C. was examined. The plate did not smell any acetic acid.
【００２７】さらに、自然条件下の土壌埋設試験によっ
て生分解性を調べたところ、分解した。Further, the biodegradability was examined by a soil burial test under natural conditions.
【００２８】また木粉末をかなりの量添加できるので、
全体としてのコストも安価になる。Also, since a considerable amount of wood powder can be added,
The overall cost is also lower.
【００２９】（実施例２）酢酸セルロースフレーク（帝
人株式会社製、酢化度５２〜５６％、酢酸の置換度が約
２．４程度）：１０．０ｋｇと、木粉末（１００メッシ
ュ通過品）：２．０ｋｇと、可塑剤フタル酸ジエチルヘ
キシル（ＤＥＰ）：１．５ｋｇと、可塑剤フタル酸ジブ
チル（ＤＢＰ）：１．０ｋｇと、滑剤（ステアリン
酸）：０．０２ｋｇ、及び難燃剤としてトリクレジルホ
スフェート（ＴＣＰ）：０．５ｋｇを原料として用い
た。(Example 2) Cellulose acetate flakes (manufactured by Teijin Limited, acetylation degree: 52 to 56%, degree of substitution of acetic acid is about 2.4): 10.0 kg, wood powder (100 mesh passed product) 2.0 kg, plasticizer diethylhexyl phthalate (DEP): 1.5 kg, plasticizer dibutyl phthalate (DBP): 1.0 kg, lubricant (stearic acid): 0.02 kg, and trie as a flame retardant Cresyl phosphate (TCP): 0.5 kg was used as a raw material.
【００３０】まず、前記酢酸セルロースのフレークを粉
砕して微粉末にし、これにステアリン酸を加え、さらに
ＤＢＰとＤＥＰの可塑剤混合溶液を含浸させ、さらに木
粉末及びＴＣＰを加えて２軸押出機により１８０〜１９
０℃で混練押出し、ペレット化した。First, the flakes of cellulose acetate are pulverized to a fine powder, to which stearic acid is added, a plasticizer mixed solution of DBP and DEP is further impregnated, and wood powder and TCP are further added. 180 to 19
The mixture was kneaded and extruded at 0 ° C. and pelletized.
【００３１】得られたペレットを射出成形機を用いて、
長さ６０ｃｍ、幅２０ｃｍ、厚さ５ｍｍのプレートを成
形した。このものは、木材調の手触りを出すことができ
た。また、安全性、耐水性、緻密性、加工性、生分解性
に優れていた。難燃性はＵＬ規格で９４Ｖ−１であっ
た。The obtained pellets are formed by using an injection molding machine.
A plate having a length of 60 cm, a width of 20 cm and a thickness of 5 mm was formed. It was able to give a woody feel. In addition, it was excellent in safety, water resistance, denseness, processability, and biodegradability. Flame retardancy was 94 V-1 in UL standard.
【００３２】また得られたプレートの１０平方ｃｍの試
験片を室温の水および６０℃の温水に浸した前後の変化
を調べたが、なんら形状や物性の変化は見られなかっ
た。前記プレートの酢酸臭は全くしなかった。Further, changes in before and after immersing a 10-square cm test piece of the obtained plate in room temperature water and 60 ° C. warm water were examined, but no change in shape or physical properties was observed. The plate did not smell any acetic acid.
【００３３】さらに、自然条件下の土壌埋設試験によっ
て生分解性を調べたところ、分解した。Further, when the biodegradability was examined by a soil burial test under natural conditions, it was decomposed.
【００３４】[0034]
【発明の効果】以上説明したとおり、本発明によれば、
安全性、耐水性、緻密性、加工性、生分解性に優れ、木
材調の手触りを出せる生分解性樹脂組成物を提供でき、
難燃剤を加えることにより難燃性にも優れた生分解性樹
脂組成物を提供できる。また木粉末をかなりの量添加で
きるので、全体としてのコストも安価にできる。As described above, according to the present invention,
It is possible to provide a biodegradable resin composition that is excellent in safety, water resistance, denseness, processability, biodegradability, and gives a wood-like touch,
By adding a flame retardant, a biodegradable resin composition having excellent flame retardancy can be provided. In addition, since a considerable amount of wood powder can be added, the overall cost can be reduced.
Claims (5)
であって、酢酸セルロース１００重量部に対して、木粉
末を１０〜１２５重量部含む生分解樹脂組成物。1. A biodegradable resin composition containing cellulose acetate, wherein the biodegradable resin composition contains 10 to 125 parts by weight of wood powder based on 100 parts by weight of cellulose acetate.
さらに滑剤を０．１〜１．０重量部含む請求項１に記載
の生分解樹脂組成物。2. With respect to 100 parts by weight of cellulose acetate,
The biodegradable resin composition according to claim 1, further comprising 0.1 to 1.0 parts by weight of a lubricant.
さらに可塑剤を１０〜３０重量部含む請求項１に記載の
生分解樹脂組成物。3. 100 parts by weight of cellulose acetate,
The biodegradable resin composition according to claim 1, further comprising 10 to 30 parts by weight of a plasticizer.
のジアセテートである請求項１に記載の生分解樹脂組成
物。4. The cellulose acetate has an acetylation degree of 52 to 56%.
The biodegradable resin composition according to claim 1, which is diacetate.
粉末である請求項１に記載の生分解樹脂組成物。5. The biodegradable resin composition according to claim 1, wherein the wood powder is a powder having a size of 50 to 200 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32424999A JP2001139726A (en) | 1999-11-15 | 1999-11-15 | Biodegradable resin composition containing cellulose acetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32424999A JP2001139726A (en) | 1999-11-15 | 1999-11-15 | Biodegradable resin composition containing cellulose acetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001139726A true JP2001139726A (en) | 2001-05-22 |
Family
ID=18163706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32424999A Pending JP2001139726A (en) | 1999-11-15 | 1999-11-15 | Biodegradable resin composition containing cellulose acetate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001139726A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005082995A1 (en) * | 2004-02-27 | 2005-09-09 | The Yokohama Rubber Co., Ltd. | Rubber composition and pneumatic tire using the same |
| WO2011062488A1 (en) * | 2009-11-18 | 2011-05-26 | Meneba B.V. | Fuels pellets, their preparation and use |
| JP2011132451A (en) * | 2009-12-25 | 2011-07-07 | Fujifilm Corp | Molding material, molding, and method for producing the same, and housing for electric and electronic equipment |
-
1999
- 1999-11-15 JP JP32424999A patent/JP2001139726A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005082995A1 (en) * | 2004-02-27 | 2005-09-09 | The Yokohama Rubber Co., Ltd. | Rubber composition and pneumatic tire using the same |
| WO2011062488A1 (en) * | 2009-11-18 | 2011-05-26 | Meneba B.V. | Fuels pellets, their preparation and use |
| JP2011132451A (en) * | 2009-12-25 | 2011-07-07 | Fujifilm Corp | Molding material, molding, and method for producing the same, and housing for electric and electronic equipment |
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