JP2000309658A - Foamed material of biodegradable resin - Google Patents
Foamed material of biodegradable resinInfo
- Publication number
- JP2000309658A JP2000309658A JP11158462A JP15846299A JP2000309658A JP 2000309658 A JP2000309658 A JP 2000309658A JP 11158462 A JP11158462 A JP 11158462A JP 15846299 A JP15846299 A JP 15846299A JP 2000309658 A JP2000309658 A JP 2000309658A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- starch
- biodegradable resin
- parts
- foam
- 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
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は優れた耐湿性と復元
性とを有する新しい生分解性樹脂発泡体に関するもので
ある。従来、発泡ポリスチレンのような樹脂発泡体は、
生鮮食料品のトレーやカップ麺の容器や家電製品等の緩
衝材として使用されてきた。しかし、ポリスチレンのよ
うな合成樹脂製品は、使用後の焼却・埋設等の処理上の
問題があることから、生分解性樹脂発泡体への転換が図
られるようになった。その一つの方法として、生分解性
のある澱粉を主成分とする樹脂発泡体の開発が進められ
た。しかしながら、これらの樹脂発泡体は、耐湿性がな
く湿気を吸って、弾性や緩衝性を失い、桃等の果物や野
菜等の緩衝材として使用することができなかった。本発
明は、このような青果物の緩衝材としても使用できる優
れた耐湿性と復元性とを有する新しい生分解性樹脂発泡
体に関するものである。TECHNICAL FIELD The present invention relates to a new biodegradable resin foam having excellent moisture resistance and resilience. Conventionally, resin foams such as expanded polystyrene,
It has been used as a buffer for fresh food trays, containers for cup noodles, home electric appliances and the like. However, synthetic resin products such as polystyrene have been converted to biodegradable resin foams because of problems in processing such as incineration and burying after use. As one of the methods, development of a resin foam mainly containing biodegradable starch has been promoted. However, these resin foams do not have moisture resistance, absorb moisture, lose elasticity and cushioning properties, and cannot be used as cushioning materials for fruits and vegetables such as peaches. The present invention relates to a new biodegradable resin foam having excellent moisture resistance and resilience which can be used as a buffer for such fruits and vegetables.
【０００２】[0002]
【従来の技術】従来、りんご等の果実や陶磁器を梱包し
輸送する際の緩衝材として、藁や籾殻等の天然材料をそ
のまま利用したり、木綿や古新聞紙等の天然材料を多少
加工したものを利用したりしてきた。その後、合成樹脂
産業の発展とともに、ポリスチレン発泡体が開発される
と、ポリスチレン発泡体は、機械部品や電機部品や家電
製品等の緩衝材だけでなく、生鮮食料品のトレーやカッ
プ麺の容器にまで利用されるようになった。しかしなが
ら、これらのポリスチレン発泡体を初め、他の食料品の
包装や日用品・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ると、焼却すれば、高温になり
焼却炉を損傷し、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
支障を来たすとともに、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た。そのため、生
分解性プラスチックの開発が進められた。2. Description of the Related Art Conventionally, natural materials such as straw and rice hulls have been used as they are as cushioning materials for packing and transporting fruits and ceramics such as apples, and some natural materials such as cotton and old newspaper have been processed. And have used it. Later, with the development of the synthetic resin industry, polystyrene foam was developed.Polystyrene foam was used not only in cushioning materials for mechanical parts, electrical parts and home appliances, but also in trays for fresh food and containers for cup noodles. Until it was used. However, synthetic resin products used in the packaging of other foodstuffs, daily necessities, furniture, etc., including these polystyrene foams, are disposed of as garbage after use. However, unlike natural products such as straw and cotton, if they are dumped in landfills, they will not be decomposed by microorganisms,
It will remain bulky for a long time, hindering the growth of the local plants, impairing the stability of the ground,
Occasionally, birds, wild animals, fish, and the like have inadvertently eaten the food, causing problems such as impairing the health of these animals. Therefore, development of biodegradable plastics has been promoted.
【０００３】このような状況下で、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。その一
つには、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、例えば、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。Under such circumstances, many inventions have been made on biodegradable plastics. One of them is a plastic in which corn or the like is mixed with polyethylene or polypropylene, such as a biodegradable plastic comprising a thermoplastic starch and a thermoplastic polymer disclosed in JP-A-7-258453. Is raised. When such starch-containing plastics are discarded in soil, only the portion of the contaminated starch is decomposed by microorganisms, thereby making the plastic porous and increasing its surface area. It is considered that the resin is susceptible to the like, and in a narrow sense, is called a biodegradable resin.
【０００４】一方、澱粉に混合するプラスチックに、生
分解性を有するものを使用しようとする研究もなされ、
その結果、ポリビニールアルコールやポリカプロラクト
ン等の生分解性を有する合成高分子化合物を澱粉に混合
した生分解性プラスチックが開発されている。また、澱
粉に混合するプラスチックに生分解性を持たせようとす
る研究もなされ、ポリエチレンに乾燥澱粉と脂肪酸と脂
肪酸の鉄塩等を加えた生分解促進剤を添加して、ポリエ
チレン等を生分解性化して澱粉に添加した生分解性プラ
スチックが開発されている。[0004] On the other hand, studies have been made to use biodegradable plastics for mixing with starch.
As a result, biodegradable plastics have been developed in which a synthetic polymer compound having biodegradability such as polyvinyl alcohol or polycaprolactone is mixed with starch. Research has also been conducted to make the plastics mixed with starch biodegradable, and biodegradation of polyethylene, etc. is performed by adding a biodegradation accelerator, which is made by adding dry starch and fatty acids and iron salts of fatty acids to polyethylene. Biodegradable plastics that have been modified and added to starch have been developed.
【０００５】しかしながら、前述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く、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、あるいは、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発生していた。このよ
うな問題を解決するため、本出願人は、特開平１０−７
２５３５号公報において、澱粉、ポリビニールアルコー
ル、及び、脂肪族ポリエステルからなる耐湿性生分解樹
脂発泡体、並びに、澱粉、ポリビニールアルコール、及
び、ポリプロピレンからなる耐湿性生分解樹脂発泡体を
開示した。しかしながら、これらの樹脂発泡体は、従来
のポリスチレン樹脂発泡体に比べると、弾性や耐圧縮性
において多少問題があった。[0005] However, the above-mentioned starch-containing plastics are all poor in water resistance and moisture resistance, and when used as a cushioning foam for packing, they are put in a moisture-proof bag made of a polyethylene film or the like. It is necessary to insert and insert into the bag, pay attention to and check for tearing of the bag,
There was troublesome work such as disposal of bags after use. In addition, even if 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,
If the foam absorbs the humidity in the air, the foam will fall off, and a gap will be created between the stored articles, impairing the function as a cushioning material, or if used for packing fruits and vegetables, fruits and vegetables This causes the foam to become muddy due to the absorption of water, and the function as a cushioning material is completely lost. In order to solve such a problem, the present applicant has disclosed in
No. 2535 discloses a moisture-resistant biodegradable resin foam made of starch, polyvinyl alcohol and aliphatic polyester, and a moisture-resistant biodegradable resin foam made of starch, polyvinyl alcohol and polypropylene. However, these resin foams have some problems in elasticity and compression resistance as compared with conventional polystyrene resin foams.
【０００６】[0006]
【発明が解決しようとする課題】前述の生分解性樹脂発
泡体は、優れた弾性と耐圧縮性を有しているが、果物や
野菜から発生する水分を吸湿すると軟化して、弾性や復
元性が失われ、みずみずしさを維持したまま緩衝性を必
要とする桃等の果物や野菜の緩衝材として使用するには
至らなかった。本発明が解決しようとする課題は、この
ような青果物の緩衝材としても使用できる優れた耐湿性
と復元性とを有する新しい生分解性樹脂発泡体を提供す
ることにある。The above-mentioned biodegradable resin foam has excellent elasticity and compression resistance. However, when it absorbs moisture generated from fruits and vegetables, it softens and becomes elastic and resilient. It lost its properties and could not be used as a cushioning material for fruits and vegetables such as peaches that needed buffering properties while maintaining freshness. The problem to be solved by the present invention is to provide a new biodegradable resin foam having excellent moisture resistance and resilience, which can be used as a buffer for such fruits and vegetables.
【０００７】[0007]
【課題を解決するための手段】本発明者は、前述の課題
を解決するため、主として、澱粉６０〜８０重量部、ポ
リプロピレン１０〜４０重量部、及び、非木材質植物繊
維粉末３〜１５重量部からなることを特徴とする生分解
性樹脂発泡体（以下「第１発明」という）、並びに、主
として、澱粉６０〜８０重量部、ポリプロピレン１０〜
４０重量部、非木材質植物繊維粉末３〜１５重量部、及
び、加熱処理籾殻粉末１〜１０重量部からなることを特
徴とする生分解性樹脂発泡体（以下「第２発明」とい
う）を提供する。In order to solve the above-mentioned problems, the present inventor has mainly proposed a starch of 60 to 80 parts by weight, a polypropylene of 10 to 40 parts by weight, and a non-woody plant fiber powder of 3 to 15 parts by weight. Of a biodegradable resin foam (hereinafter referred to as "first invention"), and 60 to 80 parts by weight of starch, 10 to 10 parts by weight of polypropylene
A biodegradable resin foam (hereinafter referred to as "second invention") comprising 40 parts by weight, 3 to 15 parts by weight of non-woody plant fiber powder, and 1 to 10 parts by weight of heat-treated rice husk powder. provide.
【０００８】第１発明に係わる生分解性樹脂発泡体は、
主として、澱粉６０〜８０重量部、ポリプロピレン１０
〜４０重量部、及び、非木材質植物繊維粉末３〜１５重
量部からなることを特徴としている。ここで使用される
澱粉は、微生物によって分解されるものであればどのよ
うなものでもよいが、粒子中の水分によって容易に膨化
する穀物澱粉の方が好ましい。一般には、とうもろこし
澱粉等の市販されているものがそのまま使用される。ま
た、ポリプロピレンには、プラスチック製品を製造する
ために市販されているポリプロピレン樹脂粉末をそのま
ま使用することができる。また、非木材質植物繊維粉末
は、一般に、草本類を処理して得られたパルプを粉末化
したもので、市販されている非木材質パルプを粉末化し
て得ることができる。[0008] The biodegradable resin foam according to the first invention comprises:
Mainly starch 60-80 parts by weight, polypropylene 10
-40 weight parts and 3-15 weight parts of non-woody plant fiber powder. The starch used here may be any starch as long as it can be decomposed by microorganisms, but cereal starch which easily expands due to moisture in the particles is preferred. Generally, commercially available products such as corn starch are used as they are. As the polypropylene, a polypropylene resin powder that is commercially available for producing a plastic product can be used as it is. The non-woody plant fiber powder is generally obtained by pulverizing pulp obtained by treating herbs, and can be obtained by pulverizing commercially available non-woody pulp.
【０００９】本発明者は、特開平１１−１２３７９号公
報において、澱粉６０〜８０重量％とポリプロピレン２
０〜４０重量％に、ポリプロピレンの生分解性を高める
ために、長鎖脂肪酸又はそのエステル０．６〜６重量％
と鉄の長鎖脂肪酸塩０．１〜０．５重量％を添加して製
造した生分解性樹脂発泡体に係わる発明を開示した。更
に、特願平１０−２１４７１８号明細書において、澱粉
６０〜８０重量部とポリプロピレン２０〜４０重量部
に、これらの高分子を架橋して発泡体の強度を高めるた
めに、チタネート系架橋剤０．０１〜５．０重量部を添
加して製造した生分解性樹脂発泡体、及び、それらに更
に天然木質素材１〜３０重量部を添加して製造した生分
解性樹脂発泡体に係わる発明を開示した。しかしなが
ら、これらの生分解性樹脂発泡体は、青果物を梱包した
場合、次第に青果物から発生する湿気を吸収して弾性や
復元性が失われていた。第１発明に係わる生分解性樹脂
発泡体は、澱粉とポリプロピレンに、非木材質植物繊維
粉末を加え、それに梱包中に青果物から発生する湿気を
吸着させ、澱粉の湿気によるべとつきや糊状化を防止し
て、青果物等の梱包にも使用できるようにしたものであ
る。従って、第１発明に係わる生分解性樹脂発泡体は、
単に、澱粉とポリプロピレンと非木材質植物繊維粉末か
らなるだけではなく、長鎖脂肪酸又はそのエステルや鉄
の長鎖脂肪酸塩やチタネート系架橋剤を含んでいてもよ
い。また、界面活性剤や顔料やその他添加剤を含んでい
てもよいし、澱粉や非木材質繊維粉末が染料により染色
されていてもよい。The inventor of the present invention disclosed in Japanese Patent Application Laid-Open No. H11-12379 that 60-80% by weight of starch and polypropylene 2
0 to 40% by weight, in order to enhance the biodegradability of polypropylene, 0.6 to 6% by weight of a long-chain fatty acid or an ester thereof.
And the invention of a biodegradable resin foam produced by adding 0.1 to 0.5% by weight of iron and long chain fatty acid salt of iron. Further, in the specification of Japanese Patent Application No. 10-214718, a titanate-based crosslinking agent was added to 60 to 80 parts by weight of starch and 20 to 40 parts by weight of polypropylene in order to crosslink these polymers to increase the strength of the foam. The present invention relates to a biodegradable resin foam produced by adding 0.11 to 5.0 parts by weight, and a biodegradable resin foam produced by further adding 1 to 30 parts by weight of a natural wood material. Disclosed. However, these biodegradable resin foams gradually absorb moisture generated from fruits and vegetables and lose elasticity and resilience when the fruits and vegetables are packed. The biodegradable resin foam according to the first invention is characterized in that non-woody plant fiber powder is added to starch and polypropylene, moisture generated from fruits and vegetables is adsorbed during packing, and stickiness and gelatinization caused by moisture of the starch are reduced. It can be used to pack vegetables and fruits. Therefore, the biodegradable resin foam according to the first invention is:
It may not only consist of starch, polypropylene and non-woody plant fiber powder, but may also contain a long-chain fatty acid or its ester, a long-chain fatty acid salt of iron, or a titanate crosslinking agent. Further, it may contain a surfactant, a pigment or other additives, and starch or non-wood fiber powder may be dyed with a dye.
【００１０】第１発明における澱粉、ポリプロピレン、
及び、非木材質植物繊維粉末の比率は、前述の範囲であ
ることが必要である。澱粉の比率が、６０重量部未満で
あると発泡性が低くなり、８０重量部を超えるとよく発
泡するが耐圧縮強度が低くなり過ぎる。また、ポリプロ
ピレンの比率が、２０重量部未満である耐圧縮強度が低
くなり、４０重量部を超えると硬くなり過ぎる。また、
非木材質繊維粉末の比率が、１重量部未満であると湿気
の吸着効果が表れず、３０重量部を超えると発泡性が低
下する。[0010] The starch, polypropylene according to the first invention,
And the ratio of the non-woody plant fiber powder needs to be in the above-mentioned range. If the ratio of starch is less than 60 parts by weight, the foaming property will be low, and if it is more than 80 parts by weight, foaming will be good, but the compression strength will be too low. When the proportion of polypropylene is less than 20 parts by weight, the compression strength becomes low, and when it exceeds 40 parts by weight, it becomes too hard. Also,
If the proportion of the non-wood fiber powder is less than 1 part by weight, the effect of adsorbing moisture will not be exhibited, and if it exceeds 30 parts by weight, the foamability will be reduced.
【００１１】第２発明に係わる生分解性樹脂発泡体は、
第１発明に係わる生分解性樹脂発泡体に、加熱処理籾殻
粉末１〜１０重量部を添加したことを特徴としている。
この加熱処理籾殻粉末は、籾殼を炭化直前まで加熱した
ものを粉末にしたもので、高い吸着能力を有しており、
非木材質植物繊維粉末が吸着しえなかった湿気や匂いを
吸着するだけでなく、果物等が保存中に放出するエチレ
ンを吸着して、青果物が過熟するのを防止する効果が期
待されるものである。なお、第２発明に係わる生分解性
樹脂発泡体においても、長鎖脂肪酸又はそのエステルや
鉄の長鎖脂肪酸塩やチタネート系架橋剤を含んでいても
よい。また、界面活性剤や顔料やその他添加剤を含んで
いてもよいし、澱粉や非木材質繊維粉末が染料により染
色されていてもよい。[0011] The biodegradable resin foam according to the second invention comprises:
The heat-treated rice husk powder is added to the biodegradable resin foam according to the first invention in an amount of 1 to 10 parts by weight.
This heat-treated rice husk powder is a powder obtained by heating rice husk until immediately before carbonization, and has a high adsorption capacity,
Non-woody plant fiber powder not only adsorbs moisture and odor that could not be adsorbed, but also adsorbs ethylene released during storage of fruits, etc., and is expected to have the effect of preventing overripening of fruits and vegetables Things. The biodegradable resin foam according to the second invention may also contain a long-chain fatty acid or an ester thereof, a long-chain fatty acid salt of iron, or a titanate crosslinking agent. Further, it may contain a surfactant, a pigment or other additives, and starch or non-wood fiber powder may be dyed with a dye.
【００１２】[0012]
【発明の実施の形態】１．生分解性樹脂発泡体の製造 〔実施例１〕コーンスターチ６，０００ｇ、ポリプロピ
レン樹脂粉末３，０００ｇ、及び、非木材質植物繊維粉
末（（株）チャフローズコーポレーション製「チャフロ
ーズ」）７００ｇを混合して、二軸押出機（φ４６ｍ
ｍ、Ｌ／Ｄ ２１．５）に供給し、シリンダー温度Ｃ１
６０℃、Ｃ２６０℃、Ｃ３１２０℃、Ｃ４１６０℃、Ｃ
５１８０℃、ダイス温度Ｄ１１７０℃で、内径２．７ｍ
ｍのダイから押し出して発泡させ、外径約２０ｍｍの円
柱の発泡体（以下「発泡体１」という）を得た。BEST MODE FOR CARRYING OUT THE INVENTION Production of Biodegradable Resin Foam [Example 1] Mixing 6,000 g of corn starch, 3,000 g of polypropylene resin powder, and 700 g of non-woody plant fiber powder ("Chaffrose" manufactured by Chafroz Corporation) And twin screw extruder (φ46m
m, L / D 21.5) and the cylinder temperature C 1
60 ° C., C 2 60 ° C., C 3 120 ° C., C 4 160 ° C., C
5 180 ° C., die temperature D 1 170 ° C., inner diameter 2.7 m
m and extruded from a die to obtain a cylindrical foam having an outer diameter of about 20 mm (hereinafter referred to as “foam 1”).
【００１３】〔実施例２〕コーンスターチ６，０００
ｇ、ポリプロピレン樹脂粉末３，０００ｇ、非木材質植
物繊維粉末（（株）チャフローズコーポレーション製
「チャフローズ」）７００ｇ、及び、加熱処理籾殻粉末
（（株）チャフローズコーポレーション製「チャフウォ
ール」）３００ｇを混合して、実施例１と同様にして、
二軸押出機に供給し、ダイから押し出して発泡させて、
外径約２０ｍｍの円柱の発泡体（以下「発泡体２」とい
う）を得た。[Example 2] Corn starch 6,000
g, 3,000 g of polypropylene resin powder, 700 g of non-woody plant fiber powder (“Chaffrose” manufactured by Chafloes Corporation), and 300 g of heat-treated chaff powder (“Chaff Wall” manufactured by Chafloth Corporation) And mixed in the same manner as in Example 1,
It is fed to a twin screw extruder, extruded from a die and foamed,
A cylindrical foam having an outer diameter of about 20 mm (hereinafter referred to as "foam 2") was obtained.
【００１４】〔比較例１〕コーンスターチ６，０００
ｇ、及び、ポリプロピレン樹脂粉末３，０００ｇを混合
して、実施例１と同様にして、二軸押出機に供給し、ダ
イから押し出して発泡させ、外径約２０ｍｍの円柱の発
泡体（以下「発泡体３」という）を得た。Comparative Example 1 Corn Starch 6,000
g, and 3,000 g of polypropylene resin powder were mixed, supplied to a twin-screw extruder, extruded from a die and foamed in the same manner as in Example 1, and foamed into a cylindrical foam having an outer diameter of about 20 mm (hereinafter ““ Foam 3 ").
【００１５】２．耐湿性試験 前述の実施例１、実施例２、及び、比較例１で得られた
発泡体１〜３を、それぞれ、縦２５０ｍｍ、横２５０ｍ
ｍ、高さ３００ｍｍの内容積を有する容器に充填し、そ
の上面に、約２５０×２５０ｍｍの鉄板を載せ、更にそ
の上に３．５ｋｇの錘を載せて、温度３０℃、湿度８５
％の恒温湿室内で５日間静置して、２４時間毎に各発泡
体に載せた鉄板の下面のまでの高さ（ｍｍ）を測定し
た。その結果は表１のとおりであった。この表から、本
発明に係わる生分解性樹脂発泡体（発泡体１、２）は、
高湿度でも耐圧縮性を有することがわかる。2. Moisture Resistance Test Each of the foams 1 to 3 obtained in Example 1, Example 2, and Comparative Example 1 was 250 mm long and 250 m wide.
m, a container having an internal volume of 300 mm in height, and a steel plate of about 250 × 250 mm placed on the upper surface thereof, and a 3.5 kg weight placed thereon.
% For 5 days, and the height (mm) to the lower surface of the iron plate placed on each foam was measured every 24 hours. The results are as shown in Table 1. From this table, the biodegradable resin foams (foams 1 and 2) according to the present invention are:
It can be seen that it has compression resistance even at high humidity.
【００１６】[0016]
【表１】 [Table 1]
【００１７】３．青果物保存試験 発泡体１〜３を、それぞれ、市販のデシケーターの乾燥
剤充填部に入れ、その上に、りんご２個とバナナ３本を
入れ、５日間観察した。その結果、比較例の発泡体３を
入れたものは、デシケーターの下方の内側に、微細な水
滴が認められたが、本発明に係わる生分解性樹脂発泡体
（発泡体１、２）を入れたものは、このような水滴は認
められなかった。しかしながら、りんごやバナナの新鮮
さの保存性について、目視では顕著な差は認められなか
った。3. Fruit and vegetable preservation test Each of the foams 1 to 3 was placed in a desiccant filling section of a commercially available desiccator, and two apples and three bananas were placed thereon and observed for 5 days. As a result, in the case where the foam 3 of the comparative example was placed, fine water droplets were observed inside the lower part of the desiccator, but the biodegradable resin foam (foams 1 and 2) according to the present invention was placed. No such water droplets were observed. However, no remarkable difference was visually observed in the preservability of the freshness of apples and bananas.
【００１８】４．耐水試験 発泡体１〜３を、それぞれ、乾燥した状態で、幅６０ｍ
ｍ、長さ１００ｍｍ、深さ５０ｍｍの内容積を有する容
器の中に、４６ｍｍの高さまで入れ、５００ｇの錘を載
せ、１時間後の収縮を測定した。その結果、本発明に係
わる生分解性樹脂発泡体（発泡体１、２）は、いずれ
も、平均すると４１．５ｍｍまでしか収縮したのに対し
て、比較例の発泡体３は、３９．１ｍｍまで収縮した。
その後、別途に、発泡体１〜３を、それぞれ、水に湿ら
せて、幅６０ｍｍ、長さ１００ｍｍ、深さ５０ｍｍの内
容積を有する容器の中に、４６ｍｍの高さまで入れ、更
に、底から５ｍｍのところまで水を張り、５００ｇの錘
を載せ、時間の経過（分）による発泡体の高さ（ｍｍ）
を測定した。その結果は表２のとおりであった。4. Water resistance test Each of the foams 1 to 3 is 60 m wide in a dry state.
m, a container having an inner volume of 100 mm in length and 50 mm in depth, was put up to a height of 46 mm, a 500 g weight was placed thereon, and the shrinkage after 1 hour was measured. As a result, the biodegradable resin foams (foams 1 and 2) according to the present invention shrank only to 41.5 mm on average, whereas the foam 3 of the comparative example had 39.1 mm. Contracted.
Thereafter, separately, each of the foams 1 to 3 is moistened with water, placed in a container having an inner volume of 60 mm in width, 100 mm in length, and 50 mm in depth to a height of 46 mm, and further from the bottom. Fill up to 5mm with water, put 500g weight, and height (mm) of foam due to passage of time (min)
Was measured. Table 2 shows the results.
【００１９】[0019]
【表２】 [Table 2]
【００２０】表２から、本発明に係わる生分解性樹脂発
泡体（発泡体１、２）は、濡れた状態でも耐圧縮性を有
することがわかる。なお、水に濡らした発泡体１〜３を
比較すると、比較例の発泡体３は、ぬめりがあり、べた
ついているが、本発明に係わる生分解性樹脂発泡体（発
泡体１、２）は、いずれも、ぬめりやべとつきがなかっ
た。また、その後の自然乾燥した状態を比較すると、比
較例の発泡体３は、弾性や緩衝性が全く回復しないのに
対して、本発明に係わる生分解性樹脂発泡体（発泡体
１、２）は、いずれも弾性や緩衝性についてかなりの回
復がみられた。From Table 2, it can be seen that the biodegradable resin foams (foams 1 and 2) according to the present invention have compression resistance even when wet. In addition, comparing the foams 1 to 3 wet with water, the foam 3 of the comparative example is slimy and sticky, but the biodegradable resin foam (foams 1 and 2) according to the present invention is None of them was slimy or sticky. Further, comparing the air-dried state thereafter, the foam 3 of the comparative example does not recover any elasticity or cushioning property, whereas the biodegradable resin foam according to the present invention (foams 1 and 2) In each case, considerable recovery was observed in elasticity and cushioning.
【００２１】[0021]
【発明の効果】本発明に係わる生分解性樹脂発泡体は、
前述のような構成であり前述ような耐湿性や復元性等の
特性を有するので、廃棄物に係わる環境問題を引き起こ
すことなく、桃等の果物や野菜等、青果物の緩衝材とし
て使用することができ、新鮮な青果物の流通の高品質化
を通して、国民の生活の向上と、産業の発展に大きく寄
与するものである。The biodegradable resin foam according to the present invention comprises:
Because it has the above-mentioned structure and has the above-mentioned properties such as moisture resistance and restorability, it can be used as a cushioning material for fruits and vegetables such as peaches and fruits without causing environmental problems related to waste. It will contribute to the improvement of people's lives and the development of industry through the upgrading of the distribution of fresh fruits and vegetables.
Claims (2)
プロピレン１０〜４０重量部、及び、非木材質植物繊維
粉末３〜１５重量部からなることを特徴とする生分解性
樹脂発泡体1. A biodegradable resin foam mainly comprising 60 to 80 parts by weight of starch, 10 to 40 parts by weight of polypropylene, and 3 to 15 parts by weight of non-woody plant fiber powder.
プロピレン１０〜４０重量部、非木材質植物繊維粉末３
〜１５重量部、及び、加熱処理籾殻粉末１〜１０重量部
からなることを特徴とする生分解性樹脂発泡体2. Mainly 60 to 80 parts by weight of starch, 10 to 40 parts by weight of polypropylene, non-woody plant fiber powder 3
To 15 parts by weight, and 1 to 10 parts by weight of heat-treated rice husk powder
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11158462A JP2000309658A (en) | 1999-04-26 | 1999-04-26 | Foamed material of biodegradable resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11158462A JP2000309658A (en) | 1999-04-26 | 1999-04-26 | Foamed material of biodegradable resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000309658A true JP2000309658A (en) | 2000-11-07 |
Family
ID=15672278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11158462A Pending JP2000309658A (en) | 1999-04-26 | 1999-04-26 | Foamed material of biodegradable resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000309658A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001094456A1 (en) * | 2000-06-09 | 2001-12-13 | Tokiwa Printing Inc. | Foamed article comprising used governmental post card as main component and method for producing the same |
| KR20030012482A (en) * | 2001-08-01 | 2003-02-12 | 장길남 | The method of manufacture for bio-decomposition plastic container containing corn starch and natural high molecule compound and thereof bio-decomposition plastic container |
| EP1773679A1 (en) * | 2004-07-19 | 2007-04-18 | Add-X Biotech AB | Packages |
| CN101787156A (en) * | 2009-01-23 | 2010-07-28 | 谘优生医智财股份有限公司 | Preparation method of environmental protection type biodegradable plastic additive with enhanced physical property |
| JP2011171341A (en) * | 2010-02-16 | 2011-09-01 | Murata Mfg Co Ltd | Method of manufacturing ceramic electronic component, and ceramic electronic component |
| CN114957935A (en) * | 2022-07-04 | 2022-08-30 | 杭州益宝材料科技有限公司 | Polybutylene succinate-polylactic acid composite material and preparation method and application thereof |
-
1999
- 1999-04-26 JP JP11158462A patent/JP2000309658A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001094456A1 (en) * | 2000-06-09 | 2001-12-13 | Tokiwa Printing Inc. | Foamed article comprising used governmental post card as main component and method for producing the same |
| KR20030012482A (en) * | 2001-08-01 | 2003-02-12 | 장길남 | The method of manufacture for bio-decomposition plastic container containing corn starch and natural high molecule compound and thereof bio-decomposition plastic container |
| EP1773679A1 (en) * | 2004-07-19 | 2007-04-18 | Add-X Biotech AB | Packages |
| EP1773679A4 (en) * | 2004-07-19 | 2009-12-30 | Add X Biotech Ab | Packages |
| US7767283B2 (en) | 2004-07-19 | 2010-08-03 | Add-X Biotech Ab | Packages |
| CN101787156A (en) * | 2009-01-23 | 2010-07-28 | 谘优生医智财股份有限公司 | Preparation method of environmental protection type biodegradable plastic additive with enhanced physical property |
| CN101787156B (en) * | 2009-01-23 | 2013-12-25 | 卢财福 | Preparation method of environmental protection type biodegradable plastic additive with enhanced physical property |
| JP2011171341A (en) * | 2010-02-16 | 2011-09-01 | Murata Mfg Co Ltd | Method of manufacturing ceramic electronic component, and ceramic electronic component |
| CN114957935A (en) * | 2022-07-04 | 2022-08-30 | 杭州益宝材料科技有限公司 | Polybutylene succinate-polylactic acid composite material and preparation method and application thereof |
| CN114957935B (en) * | 2022-07-04 | 2023-08-22 | 杭州益宝材料科技有限公司 | Polybutylene succinate-polylactic acid composite material and preparation method and application thereof |
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