JP3160607B2 - Biodegradable thermoplastic device - Google Patents
Biodegradable thermoplastic deviceInfo
- Publication number
- JP3160607B2 JP3160607B2 JP33813592A JP33813592A JP3160607B2 JP 3160607 B2 JP3160607 B2 JP 3160607B2 JP 33813592 A JP33813592 A JP 33813592A JP 33813592 A JP33813592 A JP 33813592A JP 3160607 B2 JP3160607 B2 JP 3160607B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- biodegradable thermoplastic
- biodegradable
- foamed
- molding
- 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.)
- Expired - Lifetime
Links
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)
- Biological Depolymerization Polymers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、安価で、生分解性速度
が大きく、自然環境中に放置すると微生物によって分解
し、焼却等人工的に分解する必要のない生分解性の熱可
塑性樹脂製器具に関するものである。The present invention relates to a biodegradable thermoplastic resin which is inexpensive, has a high rate of biodegradability, is decomposed by microorganisms when left in a natural environment, and does not need to be artificially decomposed such as by incineration. It is about equipment .
【０００２】[0002]
【従来の技術】従来、自然環境中に放置すると微生物に
よって分解し、焼却等人工的に分解する必要のない生分
解性器具（例えば食器類・食品包装材・玩具、その他農
業・漁業各種産業用容器・道具類）として、疎水性の生
分解性熱可塑性樹脂を成形してつくったものがある。2. Description of the Related Art Conventionally, biodegradable instruments which are decomposed by microorganisms when left in a natural environment and do not need to be artificially decomposed such as by incineration (for example, tableware, food packaging materials, toys, and various other industries for agriculture and fisheries) Containers and tools) include those formed by molding a hydrophobic biodegradable thermoplastic resin.
【０００３】また、汎用プラスチックにでんぷんなどの
天然物あるいは生分解性のプラスチックを練り込み自然
環境中に放置すると、崩壊するものがある。[0003] In addition, when a natural product such as starch or a biodegradable plastic is kneaded into a general-purpose plastic and left in a natural environment, some may collapse.
【０００４】しかしながら、上記疎水性の生分解性熱可
塑性樹脂は価格が高く、従ってそれを使用して製造した
製品は高く、しかも生分解性速度が小さいため、放置し
ていてもなかなか分解せず、一般になかなか普及しない
と言う問題点がある。[0004] However, the above-mentioned hydrophobic biodegradable thermoplastic resin is expensive, and therefore, products manufactured using it are expensive and have a low biodegradability rate. However, there is a problem that it is not easily spread.
【０００５】また、天然物あるいは生分解性プラスチッ
クを練り込んだ生崩解性のものは、完全には分解しない
うえ、分解残滓についての安全性の問題点もある。[0005] Biodegradable products obtained by mixing natural products or biodegradable plastics do not completely decompose, and there is also a problem of safety of decomposed residues.
【０００６】[0006]
【発明が解決しようとする課題】解決しようとする課題
は、原料として疎水性の生分解性熱可塑性樹脂を使って
製造した器具は価格が高く、生分解速度が小さいため、
生分解に時間が掛かることである。The problem to be solved is that a device manufactured using a hydrophobic biodegradable thermoplastic resin as a raw material is expensive and has a low biodegradation rate.
Biodegradation takes time.
【０００７】[0007]
【課題を解決するための手段】第１の発明は、生分解性
の熱可塑性樹脂を成形した器具であって、前記熱可塑性
樹脂よりなる部位を、独立気泡構造に発泡形成したもの
である。第２の発明は、生分解性の熱可塑性樹脂を成形
した器具であって、前記熱可塑性樹脂よりなる部位を、
連続気泡構造に発泡形成したものである。第３の発明
は、第２の発明における生分解性の熱可塑性樹脂を成形
した器具の表層にスキン層を形成したものである。According to a first aspect of the present invention, there is provided a device formed by molding a biodegradable thermoplastic resin, wherein a portion made of the thermoplastic resin is foamed into a closed cell structure. A second invention is a device formed by molding a biodegradable thermoplastic resin, wherein a portion made of the thermoplastic resin is
It is formed by foaming into an open cell structure. According to a third aspect of the present invention, a skin layer is formed on a surface layer of a device formed by molding the biodegradable thermoplastic resin according to the second aspect of the invention.
【０００８】[0008]
【実施例】実施例について図により説明すると、先ず生
分解性の熱可塑性樹脂であるポリカプロラクトン（ダイ
セル化学工業製ＰＬＡＣＣＥＬ Ｈ−７）１０００ｇを
８５℃，３時間掛けて加熱融解させ、これに発泡剤とし
てアゾジカルボンアミドを２０ｇ加え、温度を約７０℃
に保持し、混練りを行い、ポリカプロラクトンにアゾジ
カルボンアミドが均一に分散したところで、シート状に
切出し、厚さ４ｍｍ、縦４０ｍｍ，横４０ｍｍのコンパ
ウンド１０を製造する。これを下型２０上で２１０℃、
１５分間加熱し、発泡させると、見掛け密度約０．３ｇ
／ｃｍ３の発泡体３０が得られる。この状態で上型４０
を重ね、プレス成形すると、見掛け密度約０．３ｇ／ｃ
ｍ３の製品５０が得られる。なお、生分解性の熱可塑性
樹脂として、ポリカプロラクトンの他、ポリグリコリ
ド、微生物産のポリヒドロキシアルカノエート等を用い
ることが出来る。なお、樹脂の材質を改善するために、
必要に応じて、可塑剤・フィラー等を添加することが出
来る。The example will be described with reference to the drawings. First, 1000 g of polycaprolactone (PLACCEL H-7 manufactured by Daicel Chemical Industries, Ltd.), which is a biodegradable thermoplastic resin, is heated and melted at 85 ° C. for 3 hours, and foamed. 20 g of azodicarbonamide was added as an agent, and the temperature was increased to about 70 ° C.
After kneading and kneading, and the azodicarbonamide is uniformly dispersed in the polycaprolactone, the compound is cut into a sheet to produce a compound 10 having a thickness of 4 mm, a length of 40 mm and a width of 40 mm. This is placed on the lower mold 20 at 210 ° C.
When heated for 15 minutes and foamed, the apparent density is about 0.3g
/ Cm 3 of foam 30 is obtained. In this state, the upper mold 40
And press molding, apparent density about 0.3g / c
m 3 of the product 50 is obtained. As the biodegradable thermoplastic resin, besides polycaprolactone, polyglycolide, microbial polyhydroxyalkanoate and the like can be used. In order to improve the resin material,
If necessary, a plasticizer, a filler, and the like can be added.
【０００９】[0009]
【作用】得られた製品は、気泡構造を有し、見掛け比重
が小さく、製品容積当りに要する生分解性の熱可塑性樹
脂量が減少し、コストが低下すると共に、比表面積が大
きいため、微生物との接触度合いが高く、生分解速度が
大きく、放置しておくと、短期間に生分解する。発泡体
３０としては、独立気泡発泡体３１・連続気泡発泡体３
２のいずれも製造可能であるが、外部に通じる連続気泡
発泡体３２構造のものが、生分解速度が高い。しかし、
気密・液密性に欠けるため、気体・液体を透過させない
ためには表面にスキン層又はコーティング層３３を形成
する必要がある。The resulting product has a cellular structure, a small apparent specific gravity, a reduced amount of biodegradable thermoplastic resin required per product volume, a reduced cost, and a large specific surface area. The degree of contact with is high, the rate of biodegradation is high, and if left untouched, biodegrades in a short period of time. The foam 30 includes closed-cell foam 31 and open-cell foam 3
2 can be manufactured, but those having an open-cell foam 32 structure that communicates with the outside have a higher biodegradation rate. But,
Because of lack of airtightness and liquid tightness, it is necessary to form a skin layer or a coating layer 33 on the surface to prevent gas and liquid from permeating.
【００１０】[0010]
【発明の効果】本発明は以上のように構成されるため、
安価であって、耐水性に優れ、しかも生分解速度が大き
く、使用後は自然環境中に放置して、何等、手を加えな
くても、微生物によって短期間に分解し、使用者の要求
に応えるものである。Since the present invention is configured as described above,
It is inexpensive, has excellent water resistance, and has a high biodegradation rate.After use, it can be left in the natural environment and decomposed by microorganisms in a short period of time without any modification. It responds.
【図１】本発明の製品のうち、独立気泡構造を有する容
器を示す断面図である。FIG. 1 is a cross-sectional view showing a container having a closed-cell structure among products of the present invention.
【図２】連続気泡構造を有する容器を示す断面図であ
る。FIG. 2 is a cross-sectional view showing a container having an open-cell structure.
【図３】本発明の製造工程を示す工程図である。FIG. 3 is a process chart showing a manufacturing process of the present invention.
１０ コンパウンド ２０ 下型 ３０ 発泡体 ３１ 独立気泡発泡体 ３２ 連続気泡発泡体 ３３ スキン層又はコーティング層 ４０ 上型 ５０ 製品 DESCRIPTION OF SYMBOLS 10 Compound 20 Lower mold 30 Foam 31 Closed cell foam 32 Open cell foam 33 Skin layer or coating layer 40 Upper mold 50 Product
───────────────────────────────────────────────────── フロントページの続き (72)発明者 橋本 邦彦 広島市西区三篠町２丁目２番８号西川ゴ ム工業株式会社内 (72)発明者 山本 博一 広島市西区三篠町２丁目２番８号西川ゴ ム工業株式会社内 審査官 溝渕 良一 (56)参考文献 特開 平５−294332（ＪＰ，Ａ) 特開 平５−69515（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B65D 65/46 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kunihiko Hashimoto, Inventor Nishikawa Gum Industrial Co., Ltd. 2-2-2-8, Nishino-ku, Hiroshima-shi (72) Inventor Hirokazu Yamamoto 2-2-2, Mishino-cho, Nishi-ku, Hiroshima-shi No. Nishikawa Rubber Industry Co., Ltd. Examiner Ryoichi Mizobuchi (56) References JP-A-5-294332 (JP, A) JP-A 5-69515 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B65D 65/46
Claims (3)
であって、前記熱可塑性樹脂よりなる部位を、独立気泡
構造に発泡形成した生分解性の熱可塑性樹脂製器具。1. A device formed by molding a biodegradable thermoplastic resin, wherein the portion made of the thermoplastic resin is foamed into a closed cell structure to form a biodegradable thermoplastic resin device .
であって、前記熱可塑性樹脂よりなる部位を、連続気泡
構造に発泡形成した生分解性の熱可塑性樹脂製器具。2. A device made of a biodegradable thermoplastic resin, wherein the portion made of the thermoplastic resin is foamed into an open-cell structure to form a biodegradable thermoplastic resin device .
の表層にスキン層を形成した請求項２記載の生分解性の
熱可塑性樹脂製器具。3. The device made of a biodegradable thermoplastic resin according to claim 2, wherein a skin layer is formed on a surface layer of the device made of a biodegradable thermoplastic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33813592A JP3160607B2 (en) | 1992-11-24 | 1992-11-24 | Biodegradable thermoplastic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33813592A JP3160607B2 (en) | 1992-11-24 | 1992-11-24 | Biodegradable thermoplastic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06156524A JPH06156524A (en) | 1994-06-03 |
| JP3160607B2 true JP3160607B2 (en) | 2001-04-25 |
Family
ID=18315244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33813592A Expired - Lifetime JP3160607B2 (en) | 1992-11-24 | 1992-11-24 | Biodegradable thermoplastic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3160607B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003070592A1 (en) * | 2002-02-21 | 2003-08-28 | Nissei Kabushiki Kaisha | Tightly covered container |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200643074A (en) * | 2005-03-28 | 2006-12-16 | Kaneka Corp | Method for producing extruded foam of polyhydroxyalkanoate resin and extruded foam produced by the production method |
| TW200635991A (en) * | 2005-03-28 | 2006-10-16 | Kaneka Corp | Method for producing extruded P3HA resin foam |
-
1992
- 1992-11-24 JP JP33813592A patent/JP3160607B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003070592A1 (en) * | 2002-02-21 | 2003-08-28 | Nissei Kabushiki Kaisha | Tightly covered container |
| CN100572212C (en) * | 2002-02-21 | 2009-12-23 | 日世株式会社 | The manufacture method of airtight container |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06156524A (en) | 1994-06-03 |
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