JPH03269059A - Polymer composition - Google Patents
Polymer compositionInfo
- Publication number
- JPH03269059A JPH03269059A JP6947590A JP6947590A JPH03269059A JP H03269059 A JPH03269059 A JP H03269059A JP 6947590 A JP6947590 A JP 6947590A JP 6947590 A JP6947590 A JP 6947590A JP H03269059 A JPH03269059 A JP H03269059A
- Authority
- JP
- Japan
- Prior art keywords
- polymer composition
- synthetic polymer
- polymer
- pts
- seaweed
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 25
- 229920000642 polymer Polymers 0.000 title claims abstract description 14
- 229920001059 synthetic polymer Polymers 0.000 claims abstract description 23
- 241001474374 Blennius Species 0.000 claims description 20
- 239000003337 fertilizer Substances 0.000 abstract description 6
- 230000000704 physical effect Effects 0.000 abstract description 6
- 239000004793 Polystyrene Substances 0.000 abstract description 4
- 229920002223 polystyrene Polymers 0.000 abstract description 4
- 235000010443 alginic acid Nutrition 0.000 abstract description 3
- 239000000783 alginic acid Substances 0.000 abstract description 3
- 229920000615 alginic acid Polymers 0.000 abstract description 3
- 229960001126 alginic acid Drugs 0.000 abstract description 3
- 150000004781 alginic acids Chemical class 0.000 abstract description 3
- 241000196251 Ulva arasakii Species 0.000 abstract description 2
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 239000003963 antioxidant agent Substances 0.000 abstract description 2
- 150000002148 esters Chemical class 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 239000003063 flame retardant Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 239000003381 stabilizer Substances 0.000 abstract description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract 1
- 230000003078 antioxidant effect Effects 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 229920002472 Starch Polymers 0.000 description 10
- 239000008107 starch Substances 0.000 description 10
- 235000019698 starch Nutrition 0.000 description 10
- 238000006065 biodegradation reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 229920000578 graft copolymer Polymers 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 241000512259 Ascophyllum nodosum Species 0.000 description 1
- 241000195628 Chlorophyta Species 0.000 description 1
- 241001491705 Macrocystis pyrifera Species 0.000 description 1
- 241000199919 Phaeophyceae Species 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 241000282806 Rhinoceros Species 0.000 description 1
- 241000206572 Rhodophyta Species 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 241001261506 Undaria pinnatifida Species 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、生分解性に優れた重合体組成物、許し７くは
、海藻類を含有する重合体組成物に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a polymer composition with excellent biodegradability, particularly a polymer composition containing seaweed.
（従来の技術）
最近、合成高分子の農林業への応用、あるいは合成高分
子の廃棄処理問題の緩和を１ｊ的として、生分解性また
は崩壊性という性質をもった合成高分子の開発研究が行
われるようになってきた。(Prior art) Recently, research has been conducted to develop synthetic polymers that are biodegradable or degradable, with the aim of applying synthetic polymers to agriculture and forestry, or alleviating the problem of disposal of synthetic polymers. It's starting to be done.
般に汎用の合成高分子は、生分解性または崩壊性をもた
ないが、これまでに、生分解性または崩壊性の成形物を
得る方法として、合成高分子と澱粉とからなる組成物を
熔融成形する試みが行われている。さらに、近年、澱粉
−ポリスチレングラフ昭６１−４４０８５号公報、及び
特開昭５５−１５７６４３号公報）。Generally speaking, general-purpose synthetic polymers are not biodegradable or disintegrating; however, as a method for obtaining biodegradable or disintegrating molded articles, compositions consisting of synthetic polymers and starch have been developed so far. Attempts are being made to melt mold. Furthermore, in recent years, starch-polystyrene graphs (Sho 61-44085 and Japanese Patent Application Laid-Open No. Sho 55-157643) have been developed.
（発明が解決しようとする課題）
上述の、合成高分子と澱粉からなる組成物の場合は、澱
粉部分が微生物により分解された後に、合成高分子部分
が崩壊する。しかし、成形品内部の澱粉は生分解を受け
るのに長時間を要するため、生分解速度を十げるのには
澱粉量を増やす必要があるが、澱粉量を増やすと物性を
下げる結果になる。(Problems to be Solved by the Invention) In the case of the above-mentioned composition consisting of a synthetic polymer and starch, the synthetic polymer portion disintegrates after the starch portion is decomposed by microorganisms. However, since the starch inside the molded product takes a long time to undergo biodegradation, it is necessary to increase the amount of starch to speed up the biodegradation rate, but increasing the amount of starch results in a decrease in physical properties. .
また、澱粉−ボリスチＬ−ングラフト共重合体を用いて
、設粉と合成高分子を含む組成物を得る方法においては
、該グラフト共重合体が澱粉と合成高分子との間の相溶
性を増づために、物性を損なわずに澱粉の含有量を上げ
ることができる。しかし、このグラフ［・共重合体の製
造乙こおいては、相溶性を改善するのに十分なグラフト
率を有するグラフト共重合体を得ることは難しい。し７
かも、グラフ［共重合体を得てから、さらに合成高分子
および澱粉を混合するというように、工程も煩雑であり
好ましくない。また、澱粉を加えた組成物では、崩壊後
、肥料等の有用性は期待できず、その他の用途について
も有効なものはない。In addition, in a method for obtaining a composition containing a synthetic powder and a synthetic polymer using a starch-Boristine graft copolymer, the graft copolymer increases the compatibility between the starch and the synthetic polymer. Therefore, the starch content can be increased without sacrificing physical properties. However, in this graph, it is difficult to obtain a graft copolymer with a sufficient grafting rate to improve compatibility. 7
However, the process is complicated and undesirable, as it requires mixing the synthetic polymer and starch after obtaining the copolymer. Further, compositions containing starch cannot be expected to be useful as fertilizers after disintegration, and there are no compositions that are effective for other uses.
本発明は、これらの問題点を解決するためになされたも
のであり、フィルム、容器、繊維等の各種成形品として
利用可能で、使用後は生分解性または崩壊性に優れ、し
かも分解または崩壊後の有用性をも有する重合体組成物
を提供することである。The present invention was made to solve these problems, and can be used as various molded products such as films, containers, fibers, etc., and has excellent biodegradability or disintegration after use, and does not decompose or disintegrate. It is an object of the present invention to provide a polymer composition that also has the following utility.
（課題を解決するための手段）
海藻類が有効な肥料となること、および海藻に多量に含
まれるアルギン酸は水に浸すと約２０倍にも膨潤するこ
とが知られている。本発明者らは、このような性質をも
った海藻類を合成高分子に混合することにより、得られ
た重合体組成物が生分解または崩壊を受けやすくなるこ
とを見出した。(Means for Solving the Problems) It is known that seaweed is an effective fertilizer and that alginic acid, which is contained in a large amount in seaweed, swells about 20 times when soaked in water. The present inventors have discovered that by mixing seaweed with such properties into a synthetic polymer, the resulting polymer composition becomes more susceptible to biodegradation or disintegration.
すなわち、海藻類と合成高分子からなる組成物は、水に
浸されると海藻部分が膨潤することにより、容易に物理
的崩壊を起こし、それに伴い生分解を受けやすくなるこ
と、合成高分子の物性を損なわない程度の海藻類の量で
十分な生分解または崩壊を生じること、分解または崩壊
後、海藻部分が有効な肥料となることを見出し、本発明
を完成した。In other words, when a composition consisting of seaweed and a synthetic polymer is immersed in water, the seaweed part swells, causing physical disintegration easily, making it susceptible to biodegradation. The present invention was completed based on the discovery that sufficient biodegradation or disintegration can occur with an amount of seaweed that does not impair physical properties, and that after decomposition or disintegration, the seaweed part becomes an effective fertilizer.
本発明の要旨は、一種または二種以上の海藻類および合
成高分子よりなることを特徴とする重合体組成物である
。The gist of the present invention is a polymer composition characterized by comprising one or more seaweeds and a synthetic polymer.
（作用）
本発明において使用する海藻類としては、緑藻、紅藻、
褐藻等があり、具体的には、アオサ、アオノリ、マグサ
、石灰藻、コンブ、ワカメ、アラメ、ジャイアントケル
プ、ツノマタ、スノギリ、キンサイ等が例示できる。ま
た、本発明でいう？Ｆｉｒ’ＦＭ類るする場合、海藻類
の形状としては、粒径１１以下に、好ましくは０．５
ｍ＋ｍ以下に粉砕したものが好ましい。(Action) The seaweeds used in the present invention include green algae, red algae,
There are brown algae and the like, and specific examples include sea lettuce, blue seaweed, magsa, calcareous algae, kelp, wakame seaweed, arame, giant kelp, seaweed, serpentine algae, and golden rhinoceros. Also, in the present invention? When using Fir'FM, the shape of the seaweed should be 11 or less in particle size, preferably 0.5
It is preferable that the powder be pulverized to a size of m+m or less.
本発明で使用する合成高分子には、オレフィン系、ツエ
ン系、ビニル系、ポリエステル系、ポリアミド系を含む
各種の熱可塑性樹脂が含まれる。The synthetic polymers used in the present invention include various thermoplastic resins including olefin-based, tene-based, vinyl-based, polyester-based, and polyamide-based.
具体的には、ポリエチレン、ポリプロピレン、エチレン
−酢酸ビニル共重合体、ポリスチレン、ポリアクリル酸
エステル、ポリメチルメタクリレート、ポリ酢酸ビニル
、ポリエチレンテレフタレート、ポリビニルアルコール
、ポリカプロラクトン、ポリブタジェン等が例示される
。Specific examples include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polyacrylic acid ester, polymethyl methacrylate, polyvinyl acetate, polyethylene terephthalate, polyvinyl alcohol, polycaprolactone, polybutadiene, and the like.
合成高分子に混合する海藻類の割合は、合成高分子１０
０重量部に対して、０．１〜５０重量部が好ましく、０
．１重量部未満では崩壊性付与の効果が少なく、５４１
部を超えると合成高分子の物性を低下させる。さらに好
ましいｔＬＥＦｔｌの割合は０．１〜１４１部である。The proportion of seaweed mixed with the synthetic polymer is 10% of the synthetic polymer.
It is preferably 0.1 to 50 parts by weight relative to 0 parts by weight, and
．． If it is less than 1 part by weight, the effect of imparting disintegration is small, and 541
If the amount exceeds 50%, the physical properties of the synthetic polymer will deteriorate. A more preferable proportion of tLEFtl is 0.1 to 141 parts.
本発明重合体組成物には、さらに、それぞれの樹脂にお
いて慣用されている添加剤を加えることもでき、例えば
、安定剤、酸化防止剤、紫外線吸収剤、可塑剤、難燃剤
、′４Ｊ電防止剤、着色剤、充填剤等が例示できる。但
し、これらの添加剤は、組成物の生分解性または崩壊性
を妨げない種類および量が望ましい。The polymer composition of the present invention may further contain additives commonly used in the respective resins, such as stabilizers, antioxidants, ultraviolet absorbers, plasticizers, flame retardants, '4J anti-static agents, etc. Examples include agents, colorants, fillers, and the like. However, the types and amounts of these additives are desirably such that they do not interfere with the biodegradability or disintegration of the composition.
合成高分子と海藻類との混合方法は一般的な物理的混合
方法が使用でき、得られた組成物の成形は、各樹脂に通
常用いられている押出、射出、プレス等の溶融成形方法
により、所望の形状に成形することができる。General physical mixing methods can be used to mix the synthetic polymer and seaweed, and the resulting composition can be molded by melt molding methods such as extrusion, injection, and press that are commonly used for each resin. , it can be molded into a desired shape.
本発明により得られた組成物は、海：＆類を含まないも
のと強度的にはほとんど差がなく、特にアルギン酸を用
いた場合は、さらに透明性もほとんど攬なわれない。The composition obtained according to the present invention has almost no difference in strength from a composition that does not contain sea salts, and especially when alginic acid is used, the transparency is hardly impaired.
（実施例）
実施例１
ポリスチレン粉末５０ｇ、アルギン酸ナトリウム粉末２
ｇをロータリミルムこ仕込み、激しく混合し、厚さ０．
０５ｍ５のスペーサを用いて加熱プレス機で成形し、フ
ィルムを作成した。このとき、加熱温度は２５５°Ｃ１
圧力は２０ｋｇ７ｃｍ”であった。(Example) Example 1 Polystyrene powder 50g, sodium alginate powder 2
Add g to rotary milling, mix vigorously, and reduce to a thickness of 0.
A film was created by molding with a hot press using a spacer of 0.5 m5. At this time, the heating temperature is 255°C1
The pressure was 20 kg 7 cm''.
他の合成高分子および海藻類の量や種類を変更した組成
物についても同様に調製および成形を行い、０．０５ｍ
＋＋［のフィルムとした。Compositions with different amounts and types of other synthetic polymers and seaweeds were prepared and molded in the same way, and 0.05 m
It was made into a film of ++[.
各フィルムの引張強度（ＪＩＳ Ｋ ７１２７により測
定）、および土中に−カ月間放置した後の重量減少率を
第１表に示す。Table 1 shows the tensile strength (measured according to JIS K 7127) of each film and the weight loss rate after being left in soil for one month.
比較例１
海藻を用いないこと以外は実施例１と同様に行った結果
を第１表に示す。Comparative Example 1 Table 1 shows the results of the same procedure as in Example 1 except that no seaweed was used.
（発明の効果）
本発明によれば、生分解性または崩壊性に優れた重合体
組成物を捉供できる。本発明の海藻含有重合体組成物は
、使用時は高分子自体の物性を十分に保持し、使用後は
生分解速度が速いため廃菫処理が容Ｂで２・）す、しか
も崩壊後（ま肥１として用いることができるというイｊ
用性を有する。また、木発明鉗成物は、傾雑な操作を要
せず、簡単ごこ製造することができる利点もイ１する。(Effects of the Invention) According to the present invention, a polymer composition having excellent biodegradability or disintegration property can be obtained. The seaweed-containing polymer composition of the present invention sufficiently retains the physical properties of the polymer itself during use, and has a high biodegradation rate after use, making it easy to dispose of waste violet (2). It can be used as fertilizer 1.
It has utility. In addition, the wood-invented molded product has the advantage that it does not require complicated operations and can be easily manufactured.
Claims (1)
りなることを特徴とする重合体組成物。(1) A polymer composition characterized by comprising one or more kinds of seaweed and a synthetic polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6947590A JPH03269059A (en) | 1990-03-19 | 1990-03-19 | Polymer composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6947590A JPH03269059A (en) | 1990-03-19 | 1990-03-19 | Polymer composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03269059A true JPH03269059A (en) | 1991-11-29 |
Family
ID=13403747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6947590A Pending JPH03269059A (en) | 1990-03-19 | 1990-03-19 | Polymer composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03269059A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993009184A1 (en) * | 1991-10-31 | 1993-05-13 | Kabushiki Kaisha Kobe Seiko Sho | Biodegradable plastic |
| FR2685679A1 (en) * | 1991-12-31 | 1993-07-02 | Troadec Jean Rene | FILM-FORMING COMPOSITION FOR THE PREPARATION OF AN ESSENTIALLY BIODEGRADABLE FILM. |
| US5378738A (en) * | 1991-10-31 | 1995-01-03 | Kabushiki Kaisha Kobe Seiko Sho | Biodegradable plastic |
| JP3007123U (en) * | 1994-07-22 | 1995-02-07 | 大平工業株式会社 | toothbrush |
| WO2001062844A1 (en) * | 2000-02-21 | 2001-08-30 | Zimmer Ag | Polymer compositions and moulded bodies made therefrom |
| KR100401183B1 (en) * | 2001-01-18 | 2003-10-10 | 바이오리플라 주식회사 | Biodegradable polystyrene capsules and manufacturing method thereof |
| JP2008022739A (en) * | 2006-07-19 | 2008-02-07 | Graduate School For The Creation Of New Photonics Industries | Biodegradable raw material, raising seedling pot, agricultural weed-preventive sheet, and method for producing them |
| KR100891279B1 (en) * | 2007-08-29 | 2009-04-16 | (주)유비티 코리아 | A multi-functional textile consisting of two different layers |
| JP2009535475A (en) * | 2006-05-01 | 2009-10-01 | ビーエヌティー フォース バイオディグレイダブル ポリマーズ プライベート リミテッド | Novel biodegradable polymer composition useful for the production of biodegradable plastics and method for producing the composition |
-
1990
- 1990-03-19 JP JP6947590A patent/JPH03269059A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993009184A1 (en) * | 1991-10-31 | 1993-05-13 | Kabushiki Kaisha Kobe Seiko Sho | Biodegradable plastic |
| US5378738A (en) * | 1991-10-31 | 1995-01-03 | Kabushiki Kaisha Kobe Seiko Sho | Biodegradable plastic |
| FR2685679A1 (en) * | 1991-12-31 | 1993-07-02 | Troadec Jean Rene | FILM-FORMING COMPOSITION FOR THE PREPARATION OF AN ESSENTIALLY BIODEGRADABLE FILM. |
| JP3007123U (en) * | 1994-07-22 | 1995-02-07 | 大平工業株式会社 | toothbrush |
| WO2001062844A1 (en) * | 2000-02-21 | 2001-08-30 | Zimmer Ag | Polymer compositions and moulded bodies made therefrom |
| US7951237B2 (en) | 2000-02-21 | 2011-05-31 | Smartfiber Ag | Polymer composition and molded articles produced therefrom |
| US8496748B2 (en) | 2000-02-21 | 2013-07-30 | Smartfiber Ag | Polymer composition and molded articles produced therefrom |
| KR100401183B1 (en) * | 2001-01-18 | 2003-10-10 | 바이오리플라 주식회사 | Biodegradable polystyrene capsules and manufacturing method thereof |
| JP2009535475A (en) * | 2006-05-01 | 2009-10-01 | ビーエヌティー フォース バイオディグレイダブル ポリマーズ プライベート リミテッド | Novel biodegradable polymer composition useful for the production of biodegradable plastics and method for producing the composition |
| JP2008022739A (en) * | 2006-07-19 | 2008-02-07 | Graduate School For The Creation Of New Photonics Industries | Biodegradable raw material, raising seedling pot, agricultural weed-preventive sheet, and method for producing them |
| KR100891279B1 (en) * | 2007-08-29 | 2009-04-16 | (주)유비티 코리아 | A multi-functional textile consisting of two different layers |
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