JPH0737560B2 - Biodegradable plastic moldings - Google Patents
Biodegradable plastic moldingsInfo
- Publication number
- JPH0737560B2 JPH0737560B2 JP2271710A JP27171090A JPH0737560B2 JP H0737560 B2 JPH0737560 B2 JP H0737560B2 JP 2271710 A JP2271710 A JP 2271710A JP 27171090 A JP27171090 A JP 27171090A JP H0737560 B2 JPH0737560 B2 JP H0737560B2
- Authority
- JP
- Japan
- Prior art keywords
- starch
- weight
- calcium carbonate
- present
- molded article
- 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
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- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
Description
【発明の詳細な説明】 （技術分野） 本発明は土中において微生物分解するプラスチック成形
品に関するものである。TECHNICAL FIELD The present invention relates to a plastic molded article that is microbially decomposed in soil.
（従来技術及びその問題点） 従来、土中において微生物分解性を示すプラスチックは
種々知られている。これらのプラスチックのうち、脂肪
族ポリエステルは微生物分解性において比較的すぐれた
ものであるが、一般的に高価である上、それらの内比較
的安価なものは柔軟で機械的強度に劣るという問題を含
む。(Prior Art and its Problems) Various plastics that are biodegradable in soil have been conventionally known. Among these plastics, aliphatic polyesters are relatively excellent in biodegradability, but they are generally expensive, and relatively inexpensive ones among them have the problem that they are flexible and have poor mechanical strength. Including.
（発明の課題） 本発明は、生分解性の良好な脂肪族ポリエステルを用
い、これらから機械的強度及び微生物分解性にすぐれた
安価なプラスチック成形品を提供することをその課題と
する。(Problem of the invention) An object of the present invention is to provide an inexpensive plastic molded article excellent in mechanical strength and microbial degradability from an aliphatic polyester having good biodegradability.
（課題を解決するための手段） 本発明者らは前記課題を解決すべく鋭意研究した結果、
本発明を完成するに至った。(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the present inventors have found that
The present invention has been completed.
即ち、本発明によれば、生分解性脂肪族ポリエステル30
〜60重量％と、炭酸カルシウム及び／又は炭酸マグネシ
ウム40〜70重量％からなる微生物分解性プラスチック成
形品が提供される。That is, according to the present invention, biodegradable aliphatic polyester 30
Provided is a biodegradable plastic molded article comprising -60% by weight and calcium carbonate and / or magnesium carbonate 40-70% by weight.
また、本発明によれば、生分解性脂肪族ポリエステル50
〜70重量％と、炭酸カルシウム及び／又は炭酸マグネシ
ウム20〜40重量％と、澱粉10〜30重量％からなる微生物
分解性プラスチック成形品が提供される。Further, according to the present invention, biodegradable aliphatic polyester 50
A biodegradable plastic molded article is provided which comprises -70% by weight, calcium carbonate and / or magnesium carbonate 20-40% by weight, and starch 10-30% by weight.
なお、本発明における生分解性とは、土壌などの自然環
境中で分解されること、また埋立地などの部分的自然環
境中でも分解されること、更に都市ゴミや下水処理場の
余剰汚泥、豚排泄物などの処理法として知られている好
気条件下での急速堆肥化処理で分解されること、脂肪族
ポリエステル分解酵素生産菌や、それらを含有する物な
どによって分解されることなどを意味する。The biodegradability in the present invention means that it is decomposed in a natural environment such as soil, and that it is decomposed even in a partial natural environment such as a landfill, and further, it is an urban sludge or surplus sludge of a sewage treatment plant, pig. It means that it is decomposed by rapid composting under aerobic conditions, which is known as a method of treating excrement, and that it is decomposed by aliphatic polyester-degrading enzyme-producing bacteria and substances containing them. To do.
本発明における生分解性脂肪族ポリエステルとしては、
ポリヒドロキシブチレート（PHB）及びその誘導体、ポ
リカプロラクトン（PCL）、ポリエチレンアジペート（P
EA）、ポリテトラメチレンアジペート等の脂肪族ポリエ
ステル及びその誘導体、ポリシクロヘキシレンジメチル
アジペート等の脂環族ポリエステル及びその誘導体、熱
可塑性樹脂と生分解性を有する脂肪族ポリエステルとの
共重合体等があげられる。これらは、単独であるいは２
種以上の混合物として用いられる。The biodegradable aliphatic polyester in the present invention,
Polyhydroxybutyrate (PHB) and its derivatives, polycaprolactone (PCL), polyethylene adipate (P
EA), aliphatic polyesters and derivatives thereof such as polytetramethylene adipate, alicyclic polyesters and derivatives thereof such as polycyclohexylenedimethyl adipate, copolymers of thermoplastic resins and aliphatic polyesters having biodegradability, etc. can give. These are either alone or 2
Used as a mixture of two or more species.
本発明においては、前記脂肪族ポリエステルに対して、
炭酸カルシウム及び／又は炭酸マグネシウムを、必要に
応じ、澱粉とともに配合する。炭酸カルシウム及び炭酸
マグネシウムは、高純度のものである必要はなく、これ
を生成分として含む天然物又は合成物であればよい。澱
粉としては、イモ類、米麦類、コーン類、タピオカ類等
の澱粉含有物からの澱粉の他、澱粉と酢酸ビニルやアク
リル酸、アクリレートとの共重合体等の澱粉誘導体が用
いられる。これらの炭酸カルシウム及び／又は炭酸マグ
ネシウムと、澱粉の粒径は、30μｍ以下、好ましくは10
μｍ以下である。In the present invention, with respect to the aliphatic polyester,
Calcium carbonate and / or magnesium carbonate is optionally blended with the starch. Calcium carbonate and magnesium carbonate do not have to be highly pure, and may be natural products or synthetic products containing these as production components. As the starch, in addition to starch derived from starch-containing substances such as potatoes, rice and wheat, corn and tapioca, starch derivatives such as a copolymer of starch and vinyl acetate, acrylic acid or acrylate are used. The particle size of these calcium carbonate and / or magnesium carbonate and starch is 30 μm or less, preferably 10 μm or less.
μm or less.
脂肪族ポリエステルに対する炭酸カルシウム及び／又は
炭酸マグネシウムの配合量は、澱粉を併用しない場合、
40〜70重量重量％、好ましく45〜65重量％であり、澱粉
を併用する場合、20〜40重量％、好ましくは25〜35重量
％であり、一方、澱粉の配合量は10〜30重量％、好まし
くは15〜25重量％である。The amount of calcium carbonate and / or magnesium carbonate added to the aliphatic polyester is such that when starch is not used in combination,
40-70% by weight, preferably 45-65% by weight, when used in combination with starch, 20-40% by weight, preferably 25-35% by weight, while the amount of starch is 10-30% by weight , Preferably 15 to 25% by weight.
本発明の成形品を製造するには、先ず、脂肪族ポリエス
テルに対して、炭酸カルシウム及び／又は炭酸マグネシ
ウム、必要に応じ澱粉を混合分散させる。この混合分散
は、一般に、ニーダー、バンバリー、ミキシングロール
等が用いられるが、空気酸素存在下で配合物をその溶融
温度以上に長時間保持すると、澱粉等の熱分解、焦げが
発生し変質劣化する。特公平１−29126号記載の混合分
散方法を用いれば、高温保持時間を10〜30秒と極めて短
時間にすることができるので、配合物の変質劣化を防止
することができる。また、澱粉類は生分解促進の目的
で、α−化して成形することもできる。In order to produce the molded article of the present invention, first, calcium carbonate and / or magnesium carbonate and, if necessary, starch are mixed and dispersed in the aliphatic polyester. For this mixing and dispersion, a kneader, Banbury, mixing roll, etc. are generally used. However, if the compound is kept at its melting temperature or higher in the presence of air oxygen for a long time, thermal decomposition of starch or the like will occur, causing deterioration and deterioration. . When the mixing and dispersing method described in JP-B-1-29126 is used, the holding time at high temperature can be made as short as 10 to 30 seconds, so that deterioration of the compound can be prevented. In addition, starches can be formed into α-form for the purpose of promoting biodegradation.
次に、この混合分散物を、従来公知の成形方法によって
所要形状に成形する。この場合の成形方法としては、例
えば、押出し成形、射出成形、ブロー成形、注型加工、
真空成形、溶融紡糸、カレンダー成形の他、発泡成形な
どの各種成形方法が挙げられる。Next, this mixed dispersion is molded into a required shape by a conventionally known molding method. As the molding method in this case, for example, extrusion molding, injection molding, blow molding, casting,
In addition to vacuum molding, melt spinning, calender molding, various molding methods such as foam molding may be mentioned.
なお、上記混合分散、及び成形加工時の溶融混練にさい
して、酸化防止剤、界面活性剤、着色剤等を必要に応じ
て添加してもよい。In addition, an antioxidant, a surfactant, a colorant and the like may be added as necessary during the mixing and dispersion and the melt-kneading at the time of molding.
（発明の効果） 本発明の成形品は、微生物分解性を有するとともに、多
量の炭酸カルシウム及び／又は炭酸マグネシウムを含む
もので、機械的強度にすぐれ、かつ安価に製造し得るも
のである。また、澱粉を併用した成形品は、その微生物
分解性においてさらに向上し、また澱粉分解物が肥料効
果を与えるという利点がある。(Effects of the Invention) The molded article of the present invention has microbial degradability and contains a large amount of calcium carbonate and / or magnesium carbonate, and has excellent mechanical strength and can be manufactured at low cost. In addition, a molded product using starch in combination has the advantages that its microbial degradability is further improved and that the starch degradation product gives a fertilizer effect.
本発明の成形品は、フィルム状、シート状、容器状、繊
維状等の各種の形状で使用される。The molded article of the present invention is used in various shapes such as a film shape, a sheet shape, a container shape, and a fiber shape.
本発明の成形品は、特に、植林用鉢や、植林用シートと
して好適に使用される。The molded article of the present invention is particularly preferably used as a planting pot or a planting sheet.
植林用鉢は、樹木や草木類の苗木の育成に用いられた
後、育成した樹木や草木類とともに、土中に埋込むのに
使用されるものである。この植木用鉢は、樹木や草木の
成長を妨げないように、土中において微生物分解性を示
すことが必要であるが、本発明による成形品はすぐれた
微生物分解性を示すことから、植林用鉢として好適のも
のである。しかも、本発明の成形は、炭酸カルシウム及
び／又は炭酸マグネシウムを含むことから、硫酸イオ
ン、硝酸イオン、塩素イオン等を含むpHの低い酸性雨中
の酸を中和する作用があり、苗木の根をその酸性雨から
保護する効果がある。また、澱粉を併用したものでは、
その澱粉は土中において微生物分解し、肥料効果を与え
るという利点がある。The planting pot is used for growing seedlings of trees and vegetation and then burying it in the soil together with the cultivated trees and vegetation. This plant pot is required to exhibit microbial degradability in the soil so as not to hinder the growth of trees and vegetation, but since the molded article according to the present invention exhibits excellent microbial degradability, it is suitable for planting trees. It is suitable as a pot. Moreover, since the molding of the present invention contains calcium carbonate and / or magnesium carbonate, it has an action of neutralizing acid in low pH acidic rain containing sulfate ion, nitrate ion, chloride ion, etc. It has the effect of protecting from acid rain. Also, in the case of using starch in combination,
The starch has an advantage that it is microbially decomposed in the soil to give a fertilizer effect.
植林用シートは、苗木を土中に植えるときにその周囲に
敷設するか又は浅く土中に埋設して使用されるもので、
苗木周囲の雑草の育成を防ぐとともに、苗木周囲の土壌
に降りかかる硫酸イオンや、硝酸イオン、塩素イオン等
を含むpHの低い酸性雨中の酸を中和し、土中の酸性化を
防ぎ、苗木の根をその酸性雨から保護する目的で用いら
れるものである。本発明の成形品として用いられる植林
用シートは、炭酸カルシウム及び／又は炭酸マグネシウ
ムを含むことから、このような植木用シートとして好適
のものである。また、澱粉を併用したものでは、その澱
粉が働中で微生物分解し、肥料効果を与えるという利点
がある。A tree planting sheet is used when saplings are planted in the soil, laid around them or buried shallowly in the soil.
Prevents the growth of weeds around the seedlings, neutralizes acid in low pH acidic rain containing sulfate ions, nitrate ions, chloride ions, etc. that fall on the soil around the seedlings, prevents acidification in the soil, and prevents the roots of the seedlings. It is used for the purpose of protecting the plant from the acid rain. The planting sheet used as the molded article of the present invention contains calcium carbonate and / or magnesium carbonate, and thus is suitable as such a planting sheet. In addition, the combined use of starch has an advantage that the starch is activated and decomposed by microorganisms to give a fertilizer effect.
本発明の成形品は、前記した植木用鉢や植林用シートの
他、さらに、農林業用のくいやピン、傾斜地や崖用ネッ
ト、傾斜地や崖への苗木の移植用ネット、ゴルフティ
ー、種子散布用のかごやケース、種子のコーティング
剤、肥料用袋、農薬用袋、薬剤の遊離調節基材、屋外で
使用するコップ、皿、スプーン、フォーク等の各種の使
い捨て用品等としても好適のものである。The molded article of the present invention includes, in addition to the above-mentioned plant pots and afforestation sheets, further, a pile and a pin for agriculture and forestry, a net for slopes and cliffs, a net for transplanting seedlings to slopes and cliffs, golf tees, seeds It is also suitable as a basket or case for spraying, a coating agent for seeds, a bag for fertilizers, a bag for agricultural chemicals, a drug release controlling base material, various disposable items such as cups, plates, spoons, forks used outdoors. is there.
（実施例） 以下、実施例、比較例によって本発明をより詳細に説明
する。(Example) Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
なお、以下の記載における引張弾性率は、JISK−7113、
生分解試験は酵素法に準じて行い、使用したポリエステ
ル分解酵素は微生物をはじめ動植物など自然界に広く存
在するリパーゼ等を用いた。酵素法の手順の例として、
厚み0.5mmのポリカプロラクトン（PCL）−炭酸カルシウ
ムのブレンド体のシートの断面をスライスして、その厚
み0.1mmのスライス片（PCL含量100mgとする）を試料と
し、反応組成はPCL分解酵素リゾープスアリズスのリパ
ーゼ（シグマ社製）33.8unit、緩衝剤（pH＝7.0）0.2M
−KH2PO4−Na2HPO4（和光純薬社製）2.0ml、界面活性剤
0.1％−Plysurf・A210G（第一工業製薬社製）0.5ml、全
量を20.0mlとし31℃・16時間振とうして生分解を行っ
た。反応終了後、反応液をNo.2の濾紙で濾過し、その濾
液の水溶性全有機炭素量を測定し、酵素を使用していな
い系での水溶性全有機炭素量との差をもって、PCLが酵
素により加水分解することにより反応組成中に溶出した
水溶性PCL加水分解生成物の全炭素量（TOC）として、PC
L及び、ブレンド体の生分解性の指数とした。Incidentally, the tensile modulus in the following description, JISK-7113,
The biodegradation test was carried out according to the enzyme method, and the polyester degrading enzyme used was lipase which is widely present in nature such as microorganisms and animals and plants. As an example of the enzymatic procedure,
Slice the cross-section of a sheet of polycaprolactone (PCL) -calcium carbonate blend with a thickness of 0.5 mm, and use the sliced piece with a thickness of 0.1 mm (PCL content is 100 mg) as a sample, and the reaction composition is PCL-degrading enzyme resorze S lipase (manufactured by Sigma) 33.8unit, buffer (pH = 7.0) 0.2M
-KH 2 PO 4 -Na 2 HPO 4 (Wako Pure Chemical Industries, Ltd.) 2.0 ml, surfactant
Biodegradation was performed by shaking 0.1% -Plysurf A210G (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 0.5 ml and the total amount 20.0 ml at 31 ° C. for 16 hours. After the reaction was completed, the reaction solution was filtered through No. 2 filter paper, and the amount of water-soluble total organic carbon in the filtrate was measured. As the total carbon content (TOC) of the water-soluble PCL hydrolysis product eluted in the reaction composition by the hydrolysis of
The index was L and the biodegradability index of the blend.
原料については、ポリカプロラントン（PCL）はダイセ
ル化学社製Ｈ−７、コーンスターチは日本食品加工社製
コーンスターチＷ（平均粒子径16μｍ）、炭酸カルシウ
ムは竹原化学工業社製サンライト−100（平均粒子径7.2
μｍ）を使用した。Regarding raw materials, polycaprolanton (PCL) is H-7 manufactured by Daicel Chemical Co., corn starch is corn starch W (average particle size 16 μm) manufactured by Nippon Food Processing Co., and calcium carbonate is Sunlight-100 (average particle manufactured by Takehara Chemical Industry Co., Ltd.). Diameter 7.2
μm) was used.
実施例１ 高速混合ミキサー（カワタ社製、スーパーミキサーSMG1
00を一部変更し、混合槽を250℃まで昇温可能にした。Example 1 High speed mixing mixer (Super mixer SMG1 manufactured by Kawata Co., Ltd.)
A part of 00 was changed so that the temperature of the mixing tank could be raised to 250 ° C.
この槽にPCL10kg、炭酸カルシウム10kg投入し、混合加
熱をする。約20分経過して回転電動機の負荷が急増した
時点で内容物を低回転の冷却タンクに放出し、回転を継
続して空気を吹き付け冷却固化し、粒状のブレンド体を
得た。10 kg of PCL and 10 kg of calcium carbonate are put into this tank and mixed and heated. After about 20 minutes, when the load on the rotary motor suddenly increased, the contents were discharged to a low-speed cooling tank, and the rotation was continued to blow air to cool and solidify to obtain a granular blend.
上記ブレンド体を東芝機械製押出機SE−65（65φ、ベン
トタイプ）にてシート化し、物性試験及び、生分解試験
に付した。その結果を表−１に示す。The above blended body was formed into a sheet by an extruder SE-65 (65φ, bent type) manufactured by Toshiba Machine Co., Ltd., and subjected to a physical property test and a biodegradation test. The results are shown in Table-1.
また、同ブレンド体を三紀工業社製射出成形機6S−150
にて鉢を製作したところ、目的とする物性の製品が得ら
れた。In addition, the same blended body was manufactured by Miki Kogyo Co., Ltd. injection molding machine 6S-150.
When a bowl was manufactured in, a product with the desired physical properties was obtained.
実施例２ PCL8kg、炭酸カルシウム1kgにした他は、実施例１と同
様に実験を行った。Example 2 An experiment was conducted in the same manner as in Example 1 except that PCL was 8 kg and calcium carbonate was 1 kg.
実施例３ PCL14kg、炭酸カルシウム4kg、コーンスターチ2kgにし
た他は、実施例１と同様に実験を行った。Example 3 An experiment was conducted in the same manner as in Example 1 except that 14 kg of PCL, 4 kg of calcium carbonate and 2 kg of corn starch were used.
実施例４ PCL10kg、炭酸カルシウム6kg、コーンスターチ4kgにし
た他は、実施例１と同様に試験した。Example 4 A test was conducted in the same manner as in Example 1 except that 10 kg of PCL, 6 kg of calcium carbonate and 4 kg of corn starch were used.
比較例１ PCL単独を、東芝機械製押出機SE−65（65φ）にてシー
ト化し、物性試験及び生分解試験に付した。Comparative Example 1 PCL alone was formed into a sheet by an extruder SE-65 (65φ) manufactured by Toshiba Machine Co., Ltd. and subjected to a physical property test and a biodegradation test.
以上の実験結果を表−１に示す。Table 1 shows the above experimental results.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 3:02） 67:04 (56)参考文献 特開 昭57−98556（ＪＰ，Ａ) 特公 昭57−26688（ＪＰ，Ｂ２)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location C08L 3:02) 67:04 (56) References JP-A-57-98556 (JP, A) Special features Kosho 57-26688 (JP, B2)
Claims (4)
と炭酸カルシウム及び／又は炭酸マグネシウム40〜70重
量％からなる微生物分解性プラスチック成形品。1. Biodegradable aliphatic polyester 30 to 60% by weight
A biodegradable plastic molded article comprising 40 to 70% by weight of calcium carbonate and / or magnesium carbonate.
と、炭酸カルシウム及び／又は炭酸マグネシウム20〜40
重量％と、澱粉10〜30重量％からなる微生物分解性ププ
ラスチック成形品。2. Biodegradable aliphatic polyester 50 to 70% by weight
And calcium carbonate and / or magnesium carbonate 20-40
A biodegradable plastic molded product containing 10% to 30% by weight of starch and 10% by weight of starch.
の成形品。3. The plant according to claim 1, wherein the molded article is a planting pot.
Molded product.
は２の成形品。4. The molded product according to claim 1, which is a tree planting sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2271710A JPH0737560B2 (en) | 1990-10-09 | 1990-10-09 | Biodegradable plastic moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2271710A JPH0737560B2 (en) | 1990-10-09 | 1990-10-09 | Biodegradable plastic moldings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04146952A JPH04146952A (en) | 1992-05-20 |
| JPH0737560B2 true JPH0737560B2 (en) | 1995-04-26 |
Family
ID=17503763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2271710A Expired - Lifetime JPH0737560B2 (en) | 1990-10-09 | 1990-10-09 | Biodegradable plastic moldings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0737560B2 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3044857B2 (en) * | 1991-09-12 | 2000-05-22 | 凸版印刷株式会社 | Plastic container |
| JPH05331315A (en) * | 1991-10-04 | 1993-12-14 | Agency Of Ind Science & Technol | Biodegradable plastic composition containing gelatinized starch and method for producing the same |
| JPH05238359A (en) * | 1992-02-27 | 1993-09-17 | Daifuku Co Ltd | Car washer |
| JPH05253237A (en) * | 1992-03-12 | 1993-10-05 | Olympus Optical Co Ltd | Observation assisting forceps |
| JP2801828B2 (en) * | 1992-05-13 | 1998-09-21 | 昭和高分子株式会社 | Polyester resin composition |
| JPH0591294U (en) * | 1992-05-19 | 1993-12-14 | 勝造商事株式会社 | Garden pot |
| JPH0613447U (en) * | 1992-07-30 | 1994-02-22 | 川崎鉄網株式会社 | Container for planting seedlings and fence for slope greening |
| GB9223351D0 (en) * | 1992-11-06 | 1992-12-23 | Ici Plc | Polyesters |
| JPH06276862A (en) * | 1993-03-31 | 1994-10-04 | Yuushin Seiki:Kk | flower pot |
| JPH073138A (en) * | 1993-06-15 | 1995-01-06 | Uni Charm Corp | Resin composition, porous film obtained from the resin composition, and method for producing the same |
| JP3729794B2 (en) * | 1993-09-14 | 2005-12-21 | 富士通株式会社 | Biodegradable plastic molding |
| GB2281709B (en) * | 1993-09-14 | 1998-04-08 | Fujitsu Ltd | Biodegradable resin moulded article |
| JP3406692B2 (en) * | 1994-02-08 | 2003-05-12 | 株式会社トクヤマ | Aliphatic poly (β-hydroxycarboxylic acid) composition |
| JPH09294482A (en) * | 1996-05-07 | 1997-11-18 | Nippon Shokuhin Kako Co Ltd | Biodegradable pot for raising seedlings |
| JP2001323176A (en) * | 2000-05-16 | 2001-11-20 | Maruzen Polymer Kk | Composition for mulching film and mulching film |
| JP2003013951A (en) * | 2001-06-26 | 2003-01-15 | Nsk Ltd | Temporary shaft of slider for linear motion guide bearing device |
| JP4120776B2 (en) | 2001-07-09 | 2008-07-16 | ソニー株式会社 | Biodegradable plastic material, biodegradable plastic molding, and method for producing the biodegradable plastic molding |
| US20090025290A1 (en) * | 2007-07-25 | 2009-01-29 | Ball Horticultural Company | Bottomless plant container |
| JP2014531485A (en) | 2011-09-18 | 2014-11-27 | バイオ プラズマー リミテッド | Biodegradable composition and use thereof |
| EP3031847A1 (en) * | 2014-12-11 | 2016-06-15 | Solvay Acetow GmbH | Polymer composition comprising basic additive, process and articles comprising said polymer composition |
| CN105462203A (en) * | 2015-12-23 | 2016-04-06 | 江苏道勤新材料科技有限公司 | PHB based degradable 3D printing material |
| CN105462201A (en) * | 2015-12-23 | 2016-04-06 | 江苏道勤新材料科技有限公司 | Polyhydroxybutyrate-based degradable 3D (Three Dimensional) printing supplies |
| TWI599598B (en) * | 2016-11-24 | 2017-09-21 | Biodegradable film material and method of making the same | |
| US10683399B2 (en) * | 2018-06-26 | 2020-06-16 | Intrinsic Advanced Materials, LLC | Biodegradable textiles, masterbatches, and method of making biodegradable fibers |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5726688B2 (en) | 2011-09-13 | 2015-06-03 | 株式会社東芝 | Damaged fuel inspection apparatus and method |
-
1990
- 1990-10-09 JP JP2271710A patent/JPH0737560B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5726688B2 (en) | 2011-09-13 | 2015-06-03 | 株式会社東芝 | Damaged fuel inspection apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04146952A (en) | 1992-05-20 |
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