JP2001302835A - Biodegradable foam and method for producing the same - Google Patents
Biodegradable foam and method for producing the sameInfo
- Publication number
- JP2001302835A JP2001302835A JP2000125149A JP2000125149A JP2001302835A JP 2001302835 A JP2001302835 A JP 2001302835A JP 2000125149 A JP2000125149 A JP 2000125149A JP 2000125149 A JP2000125149 A JP 2000125149A JP 2001302835 A JP2001302835 A JP 2001302835A
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- JP
- Japan
- Prior art keywords
- starch
- weight
- foam
- amount
- parts
- 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.)
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Classifications
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- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、食品用容器、梱包
用緩衝材等に使用される生分解性樹脂発泡体及びその製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biodegradable resin foam used for food containers, packing cushioning materials and the like, and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、食品用容器、梱包用緩衝材等に
は、ポリエチレン、ポリプロピレン、ポリスチレン等の
非生分解性樹脂の発泡体が使用さる場合が多い。これら
の食品容器、梱包用緩衝材等は使用後に埋設処理される
ことが多い。しかし、これらの非生分解性樹脂は埋設処
理後に半永久的に土中に存在する。このため、埋立施設
の容量を圧迫する、土壌を汚染する或いは景観を損なう
という点等が問題となっている。2. Description of the Related Art Conventionally, foams of non-biodegradable resins such as polyethylene, polypropylene, and polystyrene are often used for food containers and packing cushioning materials. These food containers, packing cushioning materials and the like are often buried after use. However, these non-biodegradable resins exist in the soil semi-permanently after the embedding process. For this reason, there is a problem in that the capacity of the landfill facility is squeezed, the soil is polluted, or the landscape is spoiled.
【０００３】この問題を解決する方法として、生分解性
樹脂と澱粉を主成分とする生分解性樹脂発泡体が開発さ
れている。生分解性樹脂と澱粉を主成分とする生分解性
樹脂発泡体は、土中で経時的に分解される為、上記の問
題を解決することが期待できる。しかし、生分解性樹脂
と澱粉を主成分とする生分解性樹脂発泡体は耐湿性に劣
るという問題点を持っている。As a method for solving this problem, a biodegradable resin foam containing a biodegradable resin and starch as main components has been developed. Since the biodegradable resin foam mainly composed of the biodegradable resin and starch is degraded with time in soil, it can be expected that the above-mentioned problem can be solved. However, a biodegradable resin foam containing a biodegradable resin and starch as main components has a problem of poor moisture resistance.
【０００４】即ち、生分解性樹脂発泡体では、通常の温
湿度条件下においても経時的に大気中の湿気を吸収し粘
着性を帯びる或いは変形するという問題が生じる。ま
た、高温多湿条件下では、より短時間で同様の問題が生
じる。このため、生分解性樹脂と澱粉を主成分とする生
分解性樹脂発泡体はその使用条件や使用環境が限定され
る。That is, the biodegradable resin foam has a problem that it absorbs moisture in the air with time and becomes tacky or deformed even under normal temperature and humidity conditions. Further, under a high-temperature and high-humidity condition, a similar problem occurs in a shorter time. For this reason, the use conditions and use environment of the biodegradable resin foam mainly composed of the biodegradable resin and starch are limited.
【０００５】例えば、特開平８−５９８９２号公報、特
開平９−２８６８７０号公報等に生分解性樹脂と澱粉を
主成分とする発泡体が開示去れている。しかし、何れの
発泡体も経時的に粘着性を帯びる或いは変形するという
問題を有する為、十分な耐湿性を有しているとは言い難
い。For example, Japanese Patent Application Laid-Open Nos. 8-59892 and 9-286870 disclose foams containing a biodegradable resin and starch as main components. However, it is difficult to say that all of the foams have sufficient moisture resistance because they have a problem of becoming tacky or deforming over time.
【０００６】[0006]
【発明が解決しようとする課題】そこで、本発明の目的
は、高い耐湿性を有し、食品容器、梱包用緩衝材等とし
て有用な生分解性樹脂発泡体及びその製造方法を提供す
ることにある。Accordingly, an object of the present invention is to provide a biodegradable resin foam having high moisture resistance and useful as a food container, a cushioning material for packing, and the like, and a method for producing the same. is there.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記の課
題を解決すべく検討を重ねた結果、脂肪族ポリエステル
に、澱粉系物質及び植物粉粒体を加え、必要に応じ発泡
剤としての水を加え、また必要に応じ発泡核剤としての
無機物粉を加えた組成物を、加熱溶融した後に、圧力を
下げ発泡成形して得られる生分解性樹脂発泡体が優れた
耐湿性を有することを見出し本発明に至った。Means for Solving the Problems As a result of repeated studies to solve the above problems, the present inventors have added a starch-based substance and a plant powder to an aliphatic polyester, and used a foaming agent as necessary. The composition obtained by adding water and, if necessary, adding an inorganic powder as a foam nucleating agent is heated and melted, and then the pressure is reduced and the biodegradable resin foam obtained by foam molding has excellent moisture resistance. This led to the present invention.
【０００８】本発明は、脂肪族ポリエステル１００重量
部に対し、澱粉系物質及び植物粉粒体を（ａ）澱粉系物
質配合量と植物粉粒体配合量の合計が５０〜４００重量
部であり、且つ（ｂ）植物粉粒体配合量が澱粉系物質配
合量と植物粉粒体配合量の合計の２０〜８０重量％にな
るように加え、必要に応じ発泡剤としての水を５０重量
部以下加え、また必要に応じ発泡核剤としての無機物粉
を３０重量部以下加えた組成物を、加圧下で加熱、溶融
した後に、圧力を下げ発泡成形して得られる生分解性樹
脂発泡体である。前記生分解性樹脂発泡体において、前
記脂肪族ポリエステルがポリ乳酸であることが好まし
い。また、前記生分解性樹脂発泡体において、前記植物
粉粒体が竹粉及び／又は木粉及び／又は籾殻粉であるこ
とが好ましい。According to the present invention, the starch-based material and the plant granules are (a) a total of 50-400 parts by weight of the starch-based material and the plant granules based on 100 parts by weight of the aliphatic polyester. And (b) adding the plant powder in an amount of 20 to 80% by weight of the total of the starch-based substance and the plant powder, and optionally adding 50 parts by weight of water as a foaming agent. A composition containing 30 parts by weight or less of an inorganic powder as a foaming nucleating agent, if necessary, is heated and melted under pressure, and then the pressure is reduced to obtain a biodegradable resin foam obtained by foam molding. is there. In the biodegradable resin foam, the aliphatic polyester is preferably polylactic acid. Further, in the biodegradable resin foam, the plant powder is preferably bamboo powder and / or wood powder and / or chaff powder.
【０００９】本発明は、脂肪族ポリエステル１００重量
部に対し、澱粉系物質及び植物粉粒体を（ａ）澱粉系物
質配合量と植物粉粒体配合量の合計が５０〜４００重量
部であり、且つ（ｂ）植物粉粒体配合量が澱粉系物質配
合量と植物粉粒体配合量の合計の２０〜８０重量％にな
るように加え、必要に応じ発泡剤としての水を５０重量
部以下加え、また必要に応じ発泡核剤としての無機物粉
を３０重量部以下加えた組成物を、加圧下で加熱、溶融
した後に、圧力を下げ発泡成形する、生分解性樹脂発泡
体の製造方法である。According to the present invention, the starch-based material and the plant granules are (a) a total of 50-400 parts by weight of the starch-based material and the plant granules based on 100 parts by weight of the aliphatic polyester. And (b) adding the plant powder in an amount of 20 to 80% by weight of the total of the starch-based substance and the plant powder, and optionally adding 50 parts by weight of water as a foaming agent. A method for producing a biodegradable resin foam, comprising heating and melting a composition containing 30 parts by weight or less of an inorganic powder as a foam nucleating agent under pressure, and then reducing the pressure and foaming the composition. It is.
【００１０】[0010]
【発明の実施の形態】脂肪族ポリエステルとしては、化
学的に合成される物や微生物により合成される物が使用
できる。化学的に合成される脂肪族ポリエステルは、ヒ
ドロキシ酸、ラクトン、二塩基酸、二塩基酸無水物、グ
リコール等を主原料として合成される。具体的には、ポ
リカプロラクトン、ポリ乳酸、ポリグリコール酸、ポリ
エチレンサクシネート、ポリブチレンサクシネート、ポ
リエチレンアジペート、ポリブチレンアジペート等のホ
モポリマー或いはこれらのコポリマー、これらのホモポ
リマー或いはコポリマーをウレタン結合、カーボネート
結合等を導入することにより変性したもの等が挙げられ
る。BEST MODE FOR CARRYING OUT THE INVENTION As the aliphatic polyester, those synthesized chemically or those synthesized by microorganisms can be used. Aliphatic polyesters that are chemically synthesized are synthesized using hydroxy acids, lactones, dibasic acids, dibasic acid anhydrides, glycols, and the like as main raw materials. Specifically, polycaprolactone, polylactic acid, polyglycolic acid, polyethylene succinate, polybutylene succinate, polyethylene adipate, homopolymer such as polybutylene adipate or copolymers thereof, these homopolymers or copolymers are urethane-bonded, carbonated Those modified by introducing a bond or the like can be mentioned.
【００１１】微生物により合成される脂肪族ポリエステ
ルとしては、ポリヒドロキシバリレート、ポリヒドロキ
シブチレート、或いはこれらのコポリマー等が挙げられ
る。これらの脂肪族ポリエステルは、単独で用いること
も、２種類以上を用いることもできる。Examples of the aliphatic polyester synthesized by microorganisms include polyhydroxyvalerate, polyhydroxybutyrate, and copolymers thereof. These aliphatic polyesters can be used alone or in combination of two or more.
【００１２】これらの脂肪族ポリエステルの内、より好
ましくはポリ乳酸が使用できる。即ち、加水分解速度の
遅いポリ乳酸を用いる場合、耐湿性がより高い発泡体が
得られる。[0012] Of these aliphatic polyesters, more preferably polylactic acid can be used. That is, when polylactic acid having a low hydrolysis rate is used, a foam having higher moisture resistance can be obtained.
【００１３】澱粉系物質としては、白玉粉、米粉、上新
粉、ビーフン、コーンスターチ、タピオカ澱粉、キャッ
サバ澱粉、くず澱粉、米澱粉、サゴ澱粉、サツマイモ澱
粉、ジャガイモ澱粉或いはこれらを酸化、エーテル化、
エステル化、架橋、酵素処理、温熱処理、酸処理等の方
法により処理した化工澱粉等が使用できる。これらの澱
粉系物質は、単独で用いることも、２種類以上を用いる
こともできる。[0013] Starch-based substances include white ball starch, rice flour, Kamishin flour, rice noodles, corn starch, tapioca starch, cassava starch, waste starch, rice starch, sago starch, sweet potato starch, potato starch, or oxidized, etherified,
Modified starch or the like treated by a method such as esterification, cross-linking, enzymatic treatment, heat treatment, and acid treatment can be used. These starch-based substances can be used alone or in combination of two or more.
【００１４】植物粉粒体としては、植物の幹、枝、葉、
根、種子、果実等の粉砕物が使用できる。具体的には、
竹粉、木粉、籾殻粉、椰子殻粉、樹皮粉、パルプ粉、ケ
ナフ粉、紙粉、麻粉、綿粉、トウモロコシの芯の粉砕
物、落花生の殻の粉砕物等が使用できる。これらの植物
粉粒体は、単独で用いることも、２種類以上を用いるこ
ともできる。これらの植物粉粒体の内、より好ましくは
竹粉及び／又は木粉及び／又は籾殻粉を使用することが
できる。竹粉及び／又は木粉及び／又は籾殻粉を使用し
た場合、得られる発泡体の耐湿性がより高い。[0014] Plant powders include plant trunks, branches, leaves,
Ground products such as roots, seeds and fruits can be used. In particular,
Bamboo flour, wood flour, rice husk flour, coconut flour, bark flour, pulp flour, kenaf flour, paper flour, hemp flour, cotton flour, ground corn core, ground peanut shell, and the like can be used. These plant powders can be used alone or in combination of two or more. Among these plant granules, bamboo flour and / or wood flour and / or rice husk flour can be used more preferably. When bamboo flour and / or wood flour and / or chaff flour is used, the resulting foam has higher moisture resistance.
【００１５】脂肪族ポリエステル１００重量部に対して
加えられる澱粉系物質及び植物粉粒体の合計配合量は５
０〜４００重量部である。５０重量部より少ないと、得
られる発泡体の気泡が不均一となる。また、４００重量
部より多いと、得られる発泡体の耐湿性が不十分とな
る。The total amount of the starch-based substance and the plant granules added to 100 parts by weight of the aliphatic polyester is 5
0 to 400 parts by weight. If the amount is less than 50 parts by weight, the cells of the obtained foam will be non-uniform. If the amount is more than 400 parts by weight, the obtained foam has insufficient moisture resistance.
【００１６】植物粉粒体配合量は、澱粉系物質配合量と
植物粉粒体配合量の合計の２０重量％以上になるように
加えられる。２０重量％未満では、得られる発泡体の耐
湿性が不十分となる。一方、植物粉粒体配合量が８０重
量％を越えると、得られる発泡体の気泡が不均一とな
る。The amount of the plant granules to be added is 20% by weight or more of the total amount of the starch-based substance and the plant granules. If it is less than 20% by weight, the obtained foam has insufficient moisture resistance. On the other hand, if the amount of the plant powder exceeds 80% by weight, the foam of the obtained foam will be non-uniform.
【００１７】無機物粉は、得られる発泡体の気泡の微細
化及び均一化の為に添加されるもので、タルク、炭酸カ
ルシウム、マイカ、クレー、シリカ、ゼオライト、アル
ミナ等が使用できる。これらの無機物粉は、単独で用い
ることも、２種類以上を用いることもできる。The inorganic powder is added to make the foam of the obtained foam fine and uniform, and talc, calcium carbonate, mica, clay, silica, zeolite, alumina and the like can be used. These inorganic powders can be used alone or in combination of two or more.
【００１８】無機物粉は、必要に応じて脂肪族ポリエス
テル１００重量部に対して、３０重量部以下の量使用さ
れる。３０重量部を超える量を使用しても、発泡体の気
泡の微細化及び均一化という効果の増加は期待できな
い。The inorganic powder is used, if necessary, in an amount of 30 parts by weight or less based on 100 parts by weight of the aliphatic polyester. Even if the amount exceeds 30 parts by weight, an increase in the effect of making the foam finer and more uniform cannot be expected.
【００１９】発泡剤としての水は、必要に応じて脂肪族
ポリエステル１００重量部に対して、５０重量部以下の
量使用される。５０重量部を超える量を使用すると、得
られる発泡体が収縮する、或いは、発泡倍率が高くなり
すぎ、強度が不十分となる。澱粉系物質、植物粉粒体が
目的とする発泡倍率の発泡体を得る為に十分な水分を含
有している場合は、この含有されている水以外に発泡剤
としての水を加える必要はない。Water as a foaming agent is used in an amount of 50 parts by weight or less based on 100 parts by weight of the aliphatic polyester, if necessary. If the amount exceeds 50 parts by weight, the obtained foam shrinks, or the expansion ratio becomes too high, and the strength becomes insufficient. When the starch-based substance or the plant powder contains sufficient moisture to obtain a foam having the desired expansion ratio, it is not necessary to add water as a foaming agent in addition to the contained water. .
【００２０】また、脂肪族ポリエステル、澱粉系物質、
植物粉粒体、水、無機物粉に加え、界面活性剤、酸化防
止剤、紫外線吸収剤、難燃剤、滑剤、離型剤等を添加す
ることもできる。Further, aliphatic polyesters, starch-based substances,
In addition to the plant powder, water, and inorganic powder, a surfactant, an antioxidant, an ultraviolet absorber, a flame retardant, a lubricant, a release agent, and the like can be added.
【００２１】本発明において、組成物の発泡は従来の非
生分解性樹脂の発泡と同様の方法で行われる。即ち、押
出発泡機或いは射出発泡機等を用い、上記の組成物を加
圧下で加熱、混合、溶融した後に、大気圧下に押し出
す、或いは型内に射出すること等により圧力を下げ水蒸
気圧により発泡成形して発泡体が得られる。In the present invention, the foaming of the composition is carried out in the same manner as the conventional foaming of a non-biodegradable resin. That is, using an extrusion foaming machine or an injection foaming machine, the above composition is heated under pressure, mixed, melted, and then extruded under atmospheric pressure, or the pressure is lowered by, for example, injection into a mold. The foam is obtained by foam molding.
【００２２】[0022]
【実施例】以下に実施例を挙げて本発明をさらに具体的
に説明するが、本発明はこれらの実施例に限定されるも
のではない。EXAMPLES The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to these examples.
【００２３】［実施例１］生分解性樹脂として、ポリ乳
酸（（株）島津製作所製；ラクティ９０２０）１００重
量部に対し、澱粉系物質としてコーンスターチ（敷島ス
ターチ（株）製；マーメイドＭ−２００）１３３重量
部、植物粉粒体として竹粉（（株）カジノ製；８０メッ
シュ）１００重量部、発泡剤として水２０重量部、無機
物粉としてタルク（勝光山鉱業所社製）１０重量部を混
合した組成物を、１００ｋｇ／時の供給速度で二軸押出
機（日立造船（株）製ＨＭＴ５７−２７；直径５７ｍ
ｍ、Ｌ／Ｄ２７）に供給し、シリンダー設定温度１５０
℃、回転数５００ｒｐｍの設定で、直径２ｍｍのダイス
より押出し、連続的に円柱状の発泡体を成型した。タピ
オカ澱粉、竹粉、水及びタルクは事前に、高速混合ミキ
サーで十分に攪拌混合したものを使用した。また、成型
時の二軸押出機の吐出圧は４０ｋｇ／ｃｍ2 、シリンダ
ー内の品温は１９０℃であった。得られた発泡体の発泡
倍率は４５倍で、微細で均一な気泡を有していた。ま
た、この発泡体を温度４０℃、湿度９５％の恒温恒湿槽
中に２４時間した後の、変形及び粘着性の発生はなかっ
た。Example 1 100 parts by weight of polylactic acid (manufactured by Shimadzu Corporation; Lacty 9020) as a biodegradable resin and corn starch (manufactured by Shikishima Starch Co., Ltd .; Mermaid M-200) as a starch-based substance 133 parts by weight, 100 parts by weight of bamboo flour (80 mesh manufactured by Casino Co., Ltd.) as plant powder, 20 parts by weight of water as a foaming agent, and 10 parts by weight of talc (manufactured by Katsumitsu Mining Co., Ltd.) as inorganic powder. A twin screw extruder (HMT57-27 manufactured by Hitachi Zosen Corporation; diameter of 57 m) was supplied at a feed rate of 100 kg / hour using the mixed composition.
m, L / D27), and cylinder set temperature of 150
At a setting of 500 ° C. and a rotation speed of 500 rpm, the mixture was extruded from a die having a diameter of 2 mm to continuously form a columnar foam. The tapioca starch, bamboo flour, water and talc used beforehand were sufficiently stirred and mixed with a high-speed mixing mixer. The discharge pressure of the twin-screw extruder during molding was 40 kg / cm 2 , and the temperature of the product in the cylinder was 190 ° C. The expansion ratio of the obtained foam was 45 times, and it had fine and uniform cells. Further, after the foam was kept in a thermo-hygrostat at a temperature of 40 ° C. and a humidity of 95% for 24 hours, there was no deformation and no stickiness.
【００２４】［実施例２〜４及び比較例１〜４］実施例
２〜４及び比較例１〜４では、組成物の配合組成（重量
部）及び発泡条件を表１の内容に変更したこと以外は、
実施例１と同様にして発泡体を得た。また、得られた発
泡体の評価結果を表２に示す。表２において、◎：非常
に良好、○：良好、×：不良 を示す。ポリブチレンス
クシネート・アジペートとしてはビオノーレ３０１０
（昭和高分子（株）製）、木粉としては１２０メッシュ
品（カネキ燃料有限会社）、籾殻粉としてはセーロンフ
ァイバーＡＡ（セーロンフィラー（株）製）を使用し
た。Examples 2 to 4 and Comparative Examples 1 to 4 In Examples 2 to 4 and Comparative Examples 1 to 4, the composition (parts by weight) of the composition and the foaming conditions were changed to those shown in Table 1. except,
A foam was obtained in the same manner as in Example 1. Table 2 shows the evaluation results of the obtained foams. In Table 2, ◎: very good, ：: good, ×: bad. Bionole 3010 as polybutylene succinate adipate
A 120 mesh product (manufactured by Kaneki Fuel Co., Ltd.) was used as wood flour, and Salon Fiber AA (manufactured by Sairon Filler Co., Ltd.) was used as chaff powder.
【００２５】[0025]
【発明の効果】本発明によれば、高い耐湿性を有し、食
品容器、梱包用緩衝材等として有用な生分解性樹脂発泡
体及びその製造方法が提供される。According to the present invention, there is provided a biodegradable resin foam having high moisture resistance and useful as a food container, a cushioning material for packing, and the like, and a method for producing the same.
【００２６】[0026]
【表１】 [Table 1]
【表２】 [Table 2]
───────────────────────────────────────────────────── 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） Ｃ０８Ｋ 3/00 Ｃ０８Ｋ 3/00 Ｃ０８Ｌ 3/02 Ｃ０８Ｌ 3/02 67/02 67/02 97/02 97/02 (72)発明者 藤井 康宏 京都府京都市中京区西ノ京桑原町１番地 株式会社島津製作所内 (72)発明者 坂田 秀之 京都府京都市中京区西ノ京桑原町１番地 株式会社島津製作所内 (72)発明者 中村 宏昌 広島県広島市安芸区船越南４丁目12番３号 株式会社大光内 Ｆターム(参考） 3E066 AA01 AA21 CA01 CA20 CB01 DA01 KA08 3E086 AD06 AD22 BA16 BA29 BA35 BB71 BB84 BB90 CA01 4F074 AA03 AA66 AA68 AC20 AC26 AC32 BA34 CA22 CA23 CA26 CC04X CC32X CC34Y DA24 DA33 DA34 4J002 AB01W AB04X AB05W AD03W AH003 BE02W CF03W CF18W CF19W DE027 DE146 DE236 DJ006 DJ016 DJ036 DJ046 DJ056 FD327 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08K 3/00 C08K 3/00 C08L 3/02 C08L 3/02 67/02 67/02 97/02 97 / 02 (72) Inventor Yasuhiro Fujii 1 Nishinokyo Kuwabaracho, Nakagyo-ku, Kyoto-shi, Kyoto, Japan Inside Shimadzu Corporation (72) Inventor Hideyuki Sakata 1 Nishinokyo-kuwabara-cho, Nakagyo-ku, Kyoto City, Kyoto Prefecture, Shimadzu Corporation (72) Inventor Hiromasa Nakamura 4-12-3, Funakoshiminami, Aki-ku, Hiroshima-shi, Hiroshima F-term (reference) 3E066 AA01 AA21 CA01 CA20 CB01 DA01 KA08 3E086 AD06 AD22 BA16 BA29 BA35 BB71 BB84 BB90 CA01 4F074 AA03 AA66 AA68 AC20 AC26 AC32 BA34 CA22 CA23 CA26 CC04X CC32X CC34Y DA24 DA33 DA34 4J002 AB01W AB04X AB05W AD03W AH003 BE02W CF03W CF18W CF19W DE027 DE146 DE236 DJ006 DJ016 DJ036 DJ046 DJ056 F D327
Claims (4)
し、澱粉系物質及び植物粉粒体を（ａ）澱粉系物質配合
量と植物粉粒体配合量の合計が５０〜４００重量部であ
り、且つ（ｂ）植物粉粒体配合量が澱粉系物質配合量と
植物粉粒体配合量の合計の２０〜８０重量％になるよう
に加え、必要に応じ発泡剤としての水を５０重量部以下
加え、また必要に応じ発泡核剤としての無機物粉を３０
重量部以下加えた組成物を、加圧下で加熱、溶融した後
に、圧力を下げ発泡成形して得られる生分解性樹脂発泡
体。1. A starch-based substance and a plant granule based on 100 parts by weight of an aliphatic polyester, wherein (a) the total amount of the starch-based substance and the plant powder is 50 to 400 parts by weight, and (B) The amount of the plant granules is added so as to be 20 to 80% by weight of the total amount of the starch-based substance and the amount of the plant granules, and 50 parts by weight or less of water as a foaming agent is added as necessary. In addition, if necessary, add 30 inorganic powders as a foam nucleating agent.
A biodegradable resin foam obtained by heating and melting a composition added in an amount of not more than part by weight under pressure, and then reducing the pressure to foam molding.
ることを特徴とする、請求項１記載の生分解性樹脂発泡
体。2. The biodegradable resin foam according to claim 1, wherein the aliphatic polyester is polylactic acid.
び／又は籾殻粉であることを特徴とする、請求項１又は
２記載の生分解性樹脂発泡体。3. The biodegradable resin foam according to claim 1, wherein the plant powder is bamboo powder and / or wood powder and / or rice husk powder.
し、澱粉系物質及び植物粉粒体を（ａ）澱粉系物質配合
量と植物粉粒体配合量の合計が５０〜４００重量部であ
り、且つ（ｂ）植物粉粒体配合量が澱粉系物質配合量と
植物粉粒体配合量の合計の２０〜８０重量％になるよう
に加え、必要に応じ発泡剤としての水を５０重量部以下
加え、また必要に応じ発泡核剤としての無機物粉を３０
重量部以下加えた組成物を、加圧下で加熱、溶融した後
に、圧力を下げ発泡成形する、生分解性樹脂発泡体の製
造方法。4. A starch-based substance and a plant granule are added to 100 parts by weight of an aliphatic polyester, and (a) the total of the starch-based substance and the plant granule is 50 to 400 parts by weight, and (B) The amount of the plant granules is added so as to be 20 to 80% by weight of the total amount of the starch-based substance and the amount of the plant granules, and 50 parts by weight or less of water as a foaming agent is added as necessary. In addition, if necessary, add 30 inorganic powders as a foam nucleating agent.
A method for producing a biodegradable resin foam, comprising heating and melting a composition added in an amount of not more than part by weight under pressure, and then reducing the pressure to foam molding.
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| JP2000125149A JP4263337B2 (en) | 2000-04-26 | 2000-04-26 | Biodegradable foam and method for producing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000125149A JP4263337B2 (en) | 2000-04-26 | 2000-04-26 | Biodegradable foam and method for producing the same |
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| Publication Number | Publication Date |
|---|---|
| JP2001302835A true JP2001302835A (en) | 2001-10-31 |
| JP4263337B2 JP4263337B2 (en) | 2009-05-13 |
Family
ID=18635154
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000125149A Expired - Fee Related JP4263337B2 (en) | 2000-04-26 | 2000-04-26 | Biodegradable foam and method for producing the same |
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| JP2004244037A (en) * | 2003-02-12 | 2004-09-02 | Goto Honsha:Kk | Cushion envelope |
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