JPH02188233A - Manufacture of plastic open cell body - Google Patents
Manufacture of plastic open cell bodyInfo
- Publication number
- JPH02188233A JPH02188233A JP833789A JP833789A JPH02188233A JP H02188233 A JPH02188233 A JP H02188233A JP 833789 A JP833789 A JP 833789A JP 833789 A JP833789 A JP 833789A JP H02188233 A JPH02188233 A JP H02188233A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- foam
- cell
- cell body
- filled
- 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
- 229920003023 plastic Polymers 0.000 title claims abstract description 12
- 239000004033 plastic Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 210000005056 cell body Anatomy 0.000 title abstract description 6
- 210000004027 cell Anatomy 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 37
- 210000000170 cell membrane Anatomy 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 239000000203 mixture Substances 0.000 abstract description 8
- 229920005989 resin Polymers 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 8
- 239000010408 film Substances 0.000 abstract description 7
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 abstract description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 abstract description 5
- 239000004156 Azodicarbonamide Substances 0.000 abstract description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 abstract description 4
- 235000019399 azodicarbonamide Nutrition 0.000 abstract description 4
- 235000014692 zinc oxide Nutrition 0.000 abstract description 4
- 239000011787 zinc oxide Substances 0.000 abstract description 4
- 239000010409 thin film Substances 0.000 abstract description 2
- 239000006260 foam Substances 0.000 description 34
- 239000007789 gas Substances 0.000 description 10
- 239000004604 Blowing Agent Substances 0.000 description 8
- 210000003491 skin Anatomy 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000011342 resin composition Substances 0.000 description 7
- 238000005187 foaming Methods 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 210000002615 epidermis Anatomy 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002984 plastic foam Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004552 water soluble powder Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプラスチック連続気泡体の製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing open-cell plastic bodies.
一般にプラスチックを基材として発泡させると独立気泡
体を形成する。しかし、独立気泡体では、フィルター、
塗布材、吸音材等の用途には不適当である。そこで、耐
候性、耐薬品性等に優れているポリオレフィン発泡体等
において、連続気泡体の製造方法が種々提案されている
。Generally, when plastic is foamed as a base material, closed cell cells are formed. However, in closed cell, the filter,
It is unsuitable for applications such as coating materials and sound absorbing materials. Therefore, various methods for producing open-celled polyolefin foams and the like, which have excellent weather resistance, chemical resistance, etc., have been proposed.
たとえば、澱粉などの水溶性粉末を樹脂に練和した後、
該水溶性粉末を溶出除去する溶出法や、ポリオレフィン
樹脂粉末を焼結する焼結法がある。For example, after kneading water-soluble powder such as starch with resin,
There are an elution method in which the water-soluble powder is eluted and removed, and a sintering method in which the polyolefin resin powder is sintered.
最近、通常の架橋ポリエチレンの独立気泡体を製造した
後、これをロール間で圧縮する等の物理的手段で気泡膜
を破壊する方法が提案されて、いる（参照：特公昭５９
−２３５４５号公報、特開昭５６−１４６７３２号公報
）。本出願人も特定の条件下で加熱発泡させた極薄気膜
を有する気泡体を、ロール間で圧縮して気泡膜を破壊す
る方法を開発し、特許出願している（参照：特公昭６２
−１９２９４号公報、特開昭５６−１２１７３９号）。Recently, a method has been proposed in which a closed-cell membrane of ordinary cross-linked polyethylene is produced and then the cell membrane is destroyed by physical means such as compressing it between rolls (Reference: Japanese Patent Publication No. 59
-23545, JP-A-56-146732). The present applicant has also developed a method for destroying a foam film by compressing it between rolls by heating and foaming a foam material with an ultra-thin film film under specific conditions, and has filed a patent application (Reference: Japanese Patent Publication No. 62
-19294, JP-A-56-121739).
さらに、ロール間で圧縮する方法の改良として、穿孔針
にて発泡体に多数の細孔を穿孔する方法が提案されてい
る（参照：特開昭６３−１５１４３５号公報）。Furthermore, as an improvement to the method of compressing between rolls, a method has been proposed in which a large number of pores are punched in the foam using a punching needle (see Japanese Patent Laid-Open No. 151435/1983).
しかし、前記の溶出法及び焼結法では発泡倍率２〜３倍
程度の極めて発泡倍率の低い気泡体しか得られない。However, the above-mentioned elution method and sintering method can only yield a foam with an extremely low expansion ratio of about 2 to 3 times.
また、後者のロール間で圧縮する方法及び、穿孔針を使
用する方法では、特定の狭い条件下で発泡させた気泡体
でないと、連続気泡率１００％又は１００％に近い気泡
体を得ることができない。しかも、圧縮後の回復率の良
いモチレンー酢酸ビニル共重合体を基材とする気泡体で
あっても、厚みの回復率は８０〜９０％しかなく、かつ
圧縮後の表面が平滑にならない。そのため、材料効率が
悪く、又金型の厚み設計が困難である。In addition, in the latter method of compressing between rolls and using a perforating needle, it is difficult to obtain a foam with an open cell ratio of 100% or close to 100% unless the foam is foamed under specific narrow conditions. Can not. Moreover, even if the foam is based on a motylene-vinyl acetate copolymer which has a good recovery rate after compression, the thickness recovery rate is only 80 to 90%, and the surface after compression is not smooth. Therefore, material efficiency is poor and it is difficult to design the thickness of the mold.
本発明の目的は、上記の点に鑑みて、一般的な発泡条件
で製造されたプラスチック発泡体を使用して、厚みを減
らすことな（、容易、確実にプラスチック連続気泡体を
製造できる方法を提供することにある。In view of the above points, an object of the present invention is to provide a method for easily and reliably manufacturing open-cell plastic foam without reducing the thickness, using plastic foam manufactured under general foaming conditions. It is about providing.
本発明のプラスチック連続気泡体の製造方法は、プラス
チック独立気泡体を気体又は液体による加圧下で放置し
た後除圧することによって、気泡膜を破壊して連続気泡
構造を得ることを特徴とする。即ち、気体又は液体によ
る圧力をかけることによって、気泡を構成する格子と気
泡膜の内、格子６ζ負荷をかけることな（、格子に較べ
て樹脂の薄い気泡膜を破壊して連通化せしめるものであ
る。The method for producing a plastic open-celled cell according to the present invention is characterized in that the plastic closed-celled cell is left under pressure with gas or liquid and then the pressure is removed to destroy the cell membrane and obtain an open-celled structure. That is, by applying pressure with gas or liquid, the lattice 6ζ of the lattice and bubble membrane constituting the bubble is destroyed and the bubble membrane, which is thinner than the lattice, is made to communicate. be.
本発明において、プラスチック独立気泡体は、オレフィ
ン系独立気泡体など、通常の発泡方法で独立気泡となる
ものをいう。In the present invention, the closed-cell plastic foam refers to a closed-cell foam such as an olefin-based closed-cell foam that becomes closed-cell through a normal foaming method.
気泡体の基材となる樹脂は、プラスチックであれば、何
でも適用できるが、回復性及び加工性の点から好ましく
はポリオレフィン系樹脂、特に好ましくはエチレン系樹
脂を使用すると、効果が顕著である。Any plastic can be used as the base material of the foam, but from the viewpoint of recovery and processability, polyolefin resins, particularly preferably ethylene resins, are particularly effective.
エチレン系樹脂とは、エチレンを主成分とする重合体で
あり、高圧法ポリエチレン、低圧法低密度ポリエチレン
、線状低密度ポリエチレン、エチレン−酢酸ビニル共重
合体、エチレン−ビニルエステル共ｚ 合体、エチレン
−アクリル酸アルキル共重合体、エチレン−αオレフイ
ン系共重合体など、またはこれらの重合体、共重合体の
二種以上の混合物を主体とする樹脂が用いられる。Ethylene resin is a polymer whose main component is ethylene, including high-pressure polyethylene, low-pressure low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl ester copolymer, and ethylene. -A resin mainly composed of an alkyl acrylate copolymer, an ethylene-α olefin copolymer, or a mixture of two or more of these polymers or copolymers is used.
これらの樹脂から従来公知の方法により独立気泡体が製
造される。例えば、樹脂組成物を押出機中で加熱溶融さ
せ、発泡剤を圧入、融解させ、常圧域に押出発泡させる
方法、樹脂組成物に発泡剤を添加し、高温高圧下又は常
圧下で発泡剤を分解させるパッチ式発泡法、発泡剤を含
有させた樹脂組成物を電子線又は化学架橋剤で架橋した
後、常圧下で加熱発泡させる方法等、目的に応じて選択
できる。これらの内、特に下記の様なポリオレフィンに
関するパッチ式発泡法において、顕著な効果がある。Closed cell bodies are manufactured from these resins by conventionally known methods. For example, a method in which a resin composition is heated and melted in an extruder, a blowing agent is injected and melted, and the blowing agent is extruded into a normal pressure range, or a blowing agent is added to a resin composition and the blowing agent is added to the resin composition and the blowing agent is added to the resin composition and the foaming agent is added to the resin composition and the foaming agent is added to the resin composition and the foaming agent is heated and melted in an extruder. Depending on the purpose, a method can be selected depending on the purpose, such as a patch foaming method in which a resin composition containing a foaming agent is crosslinked with an electron beam or a chemical crosslinking agent, and then heated and foamed under normal pressure. Among these, the following patch foaming method for polyolefins is particularly effective.
第一の方法は、ポリオレフィン番ご発泡剤及び架橋剤を
練和した発泡性架橋性組成物を所望の形状に整形した後
、常圧下にて加熱して架橋剤及び発泡剤を同時進行的に
分解させて気泡体を形成させる方法である。The first method is to form a foamable crosslinkable composition in which a polyolefin foam blowing agent and a crosslinking agent are kneaded into a desired shape, and then heat it under normal pressure to simultaneously release the crosslinking agent and the blowing agent. This is a method of decomposing it to form bubbles.
竿部の方法は、ポリオレフィン番と発泡剤及び架橋剤を
練和した発泡性架橋性組成物を加圧下にて架橋した後、
常圧下にて加熱して発泡剤及び残存する架橋剤を分解さ
せて気泡体を形成させる方法である。The method of the rod part is to crosslink a foamable crosslinkable composition obtained by kneading a polyolefin number, a blowing agent, and a crosslinking agent under pressure, and then
This is a method of heating under normal pressure to decompose the foaming agent and remaining crosslinking agent to form a foam.
これらの方法に勃いて、発泡助剤、架橋助剤、カーボン
ブラック等の充填剤を適宜添加できる。In addition to these methods, fillers such as foaming aids, crosslinking aids, and carbon black can be added as appropriate.
このような方法によって得られた気泡体で、気泡径５０
μ以上が好ましく、１００μ以上であれば特に好ましい
。The foam obtained by this method has a bubble diameter of 50
It is preferably at least μ, particularly preferably at least 100 μ.
この独立気泡体を気体又は液体による加圧下で放置する
高圧容器としては、例えば、配管用炭素鋼管の開口部を
盲７ランジで溶接又はボルト、ナツトで閉じたものが使
用できる。As the high-pressure container in which the closed cell is left under pressure by gas or liquid, for example, a carbon steel pipe for piping whose opening is closed by welding with a blind 7 lange or by bolts or nuts can be used.
この高圧容器に気体又は液体の流路となる配管を設け、
水圧器から水等の液体を送り加圧状態にする。又は、窒
素等のガスボンベから気体を圧入するか、もしくは、コ
ンプレッサーによって、空気等を圧入することによって
加圧状態にする。高圧容器の安全面からは、液体が有利
である。独立気泡体の気泡膜を連通化する圧力は、好ま
しくは５気圧以上、特に好ましくは１０気圧以上である
。圧力の上限は、作用面では制限されないが、経済性か
らは３００気圧位までである。This high-pressure container is equipped with piping that serves as a flow path for gas or liquid,
Send liquid such as water from a water pressure device to pressurize it. Alternatively, a pressurized state is created by injecting gas from a gas cylinder such as nitrogen, or by injecting air or the like using a compressor. Liquids are advantageous from the standpoint of safety in high-pressure containers. The pressure for communicating the closed cell membrane is preferably 5 atm or more, particularly preferably 10 atm or more. The upper limit of the pressure is not limited in terms of operation, but is up to 300 atmospheres from an economic standpoint.
加圧下の温度は、室温でも良いが、室温より高温が好ま
しく、５０℃〜２００℃の温度に維持すれば、独立気泡
体の樹脂が軟化して、より低い圧力で連通化することが
できる。The temperature under pressure may be room temperature, but is preferably higher than room temperature, and if maintained at a temperature of 50°C to 200°C, the closed cell resin will be softened and can be made open at a lower pressure.
本発明の方法は、−回でも連続気泡率１００％の気泡体
を得ることができるが、二回以上繰り返すことによって
、低い圧力で連通化することができる。Although the method of the present invention can obtain a cell with an open cell ratio of 100% even if the method is repeated twice or more, communication can be achieved at a low pressure by repeating the method twice or more.
本発明のプラスチック連続気泡体の製造方法は、プラス
チック独立気泡体を気体又は液体による加圧下で放置す
ることによって、気泡を構成する格子と気泡膜の内、格
子に負荷をかけることなく、格子に較べて樹脂の薄い気
泡膜を破壊して連通化せしめるものである。The method for producing a plastic open-celled cell according to the present invention allows the plastic closed-celled cell to be left under pressure with gas or liquid, so that among the lattice and cell membrane constituting the cells, the lattice is not subjected to any load. In comparison, it destroys the thin cell membrane of the resin and creates communication.
又、本発明の方法を加熱下で行えば、気泡膜が軟化し、
連通化が容易になる。Moreover, if the method of the present invention is carried out under heating, the bubble film will be softened,
Communication becomes easier.
実施例１
エチレン−酢酸ビニル共重合体（商品名 ユカロンＥＶ
Ａ−４１Ｈ１酢酸ビニル含有率１６重爪％、三菱油化株
式会社製）１００重量部、アゾジカルボンアミド１７重
量部、亜鉛華０．０５重量部、ジクミルパーオキサイド
０．８重量部からなる組成物を８５℃のミキシングロー
ルにて練和し、１２５°Ｃに加熱されたプレス内の金型
（３４０ｘ１７０ｘ２９ｍ）に充填し、４０分間加圧下
で加熱し、整形品を取り出した。該整形品を開閉式の金
型（１０００ｘ ｓ ＯＯｘ １ｏＯｆｆ）に入れ、ジ
ャケット方式により、１６０°Ｃの蒸気で１３０分間加
熱して冷却後取り出し、極薄気膜を有する独立気泡体を
得゛た。得られた気泡体は、表皮付の厚みが約１００ｆ
ｆ、みかけ密度０．０３ｙ／ｃ４で、表皮をスライスし
た後の内部の平均気泡径は約２ｆｌで、連続気泡率は６
０９６であった。Example 1 Ethylene-vinyl acetate copolymer (trade name Yucalon EV)
A-41H1 Vinyl acetate content 16%, manufactured by Mitsubishi Yuka Corporation) 100 parts by weight, azodicarbonamide 17 parts by weight, zinc white 0.05 parts by weight, dicumyl peroxide 0.8 parts by weight. The material was kneaded with a mixing roll at 85°C, filled into a mold (340 x 170 x 29 m) in a press heated to 125°C, heated under pressure for 40 minutes, and the shaped product was taken out. The shaped product was placed in an open/close mold (1000x OOx 1oOff), heated with steam at 160°C for 130 minutes using a jacket method, and then taken out after cooling to obtain a closed cell foam with an extremely thin gas film. . The resulting foam has a thickness of approximately 100 f with the skin attached.
f, the apparent density is 0.03y/c4, the average bubble diameter inside after slicing the epidermis is about 2fl, and the open cell rate is 6
It was 096.
該気泡体から表皮を除去して、１５Ｘ１５Ｘ２０ｆｌの
内面気泡体を裁断した。裁断した内面気泡体を内径２６
ｎ×高さ５０ｆｆの高圧容器内に入れ、水を加えて満水
とし密閉した。そして、水温２５°Ｃ（常温）の水を水
圧器によって高圧容器内に圧入し、１０気圧まで加圧し
、５分間圧力を平衡にした。その後圧力を一気に解放し
て常圧にした。取り出した気泡体のサイズは、１５Ｘ１
５Ｘ２０１１１ｍで、処理前と変わらず、連続気泡率は
１００％であった。The skin was removed from the foam and a 15x15x20fl inner foam was cut. The inner diameter of the cut inner foam is 26mm.
The container was placed in a high-pressure container of n×height 50 ff, filled with water, and sealed. Then, water at a water temperature of 25° C. (ordinary temperature) was injected into the high-pressure container using a water pressure machine, pressurized to 10 atm, and the pressure was equilibrated for 5 minutes. After that, the pressure was released all at once to normal pressure. The size of the bubbles taken out is 15X1
The size was 5×20111 m, and the open cell rate was 100%, unchanged from before treatment.
な詔、連続気泡率の測定は、Ｒｅｍｉｎｇｔｏｎ Ｐａ
ｒｆｓｅｒ法によって行った。Measurement of open cell ratio is carried out by Remington Pa.
This was done by the rfser method.
実施例２
エチレン−酢酸ビニル共重合体（商品名 ユカｏ ンＥ
ＶＡ −４１Ｈ） １００重量部、７’ｌジ力ルボンア
ミド１７重量部、ステアリン酸亜鉛０、４ 重量部、ジ
クミルパーオキサイド０．７重量部からなる組成物を８
５°Ｃのミキシングロールにて練和し、１４０℃に加熱
されたプレス中の金型（ａ４０ｘ１７０ｘ２９ｍ）に充
填し、３０分間加圧下で加熱し、整形品を取り出した。Example 2 Ethylene-vinyl acetate copolymer (trade name: Yukan E)
VA-41H) 100 parts by weight, 17 parts by weight of 7'l dihydrobonamide, 0.4 parts by weight of zinc stearate, and 0.7 parts by weight of dicumyl peroxide.
The mixture was kneaded with a mixing roll at 5°C, filled into a mold (A40x170x29m) in a press heated to 140°C, heated under pressure for 30 minutes, and the shaped product was taken out.
該整形品を開閉式の金型（１０００ｘ５００ｘ１００ｆ
ｌ）に入れ、ジャケット方式により、１６０℃の蒸気で
１３０分間加熱して冷却後取り出し、極薄気膜を有１す
る独立気泡体を得た。The mold is an openable mold (1000x500x100f).
1), heated with steam at 160° C. for 130 minutes using a jacket method, cooled, and then taken out to obtain a closed cell having an extremely thin gas film.
得られた気泡体は、表皮付の厚みが約１００鰭、みかけ
密度０．０３Ｐ／ｄ１表皮をスライスした後の内部の平
均気泡径は約０．５ ｆｌ、連続気泡率は５５％であっ
た。The resulting foam had a thickness of approximately 100 fins including the skin, an apparent density of 0.03 P/d1, an average internal bubble diameter of approximately 0.5 fl after slicing the skin, and an open cell ratio of 55%. .
該気泡体から表皮を除去して、１５Ｘ１５Ｘ２０Ｈの内
面気泡体を裁断した。裁断した内面気泡体を実施例１と
同じ高圧容器に入れ、満水後密閉した。そして、水温２
５°Ｃ（常温）の水を水圧器によって高圧容器内に圧入
し、１００気圧まで加圧し、５分間圧力を平衡にした。The skin was removed from the foam and a 15x15x20H inner foam was cut. The cut inner foam was placed in the same high-pressure container as in Example 1, filled with water, and then sealed. And water temperature 2
Water at 5°C (room temperature) was injected into the high-pressure vessel using a water pressure machine, pressurized to 100 atm, and the pressure was equilibrated for 5 minutes.
その後圧力を一気に解放して常圧にした。取り出した気
泡体のサイズは、１５Ｘ１５Ｘ２０ｍ１１で、処理前と
変わらず、連続気泡率は１００％であった。After that, the pressure was released all at once to normal pressure. The size of the bubbles taken out was 15 x 15 x 20 m11, the same as before treatment, and the open cell rate was 100%.
実施例３
実施例２と同じ内面気泡体１５Ｘ１５Ｘ２０ｎを実施例
１と同じ高圧容器内に入れ、満水後密閉した。そして、
水温２５℃（常温）の水を水圧器によって高圧容器内薯
こ圧入し、５０気圧まで加圧し、５分間圧力を平衡にし
た後、圧力を一気に常圧まで解放した。常圧下にて１分
間放置後、再度５０気圧まで加圧し、５分間圧力を平衡
にした後、圧力を一気に常圧まで解放した。この加圧、
減圧のサイクルを計５回繰り返した。Example 3 The same 15 x 15 x 20 n inner cell foam as in Example 2 was placed in the same high-pressure container as in Example 1, and the container was sealed after being filled with water. and,
Water at a water temperature of 25°C (ordinary temperature) was injected into the high-pressure container using a water pressure machine, pressurized to 50 atm, and after equilibrating the pressure for 5 minutes, the pressure was released all at once to normal pressure. After being left at normal pressure for 1 minute, the pressure was increased to 50 atm again, the pressure was equilibrated for 5 minutes, and then the pressure was released all at once to normal pressure. This pressurization,
The cycle of pressure reduction was repeated a total of 5 times.
その結果、得られた気泡体のサイズは、１５Ｘ１５Ｘ２
０ｍであり処理前と変わらず、連続気泡率は１００％で
あった。As a result, the size of the obtained bubbles is 15X15X2
0 m, the same as before treatment, and the open cell rate was 100%.
実施例４
エチレン−酢酸ビニル共重合体（商品名 ユカロンＥＶ
Ａ−４１Ｈ，酢酸ビニル含有率１６重量％、三菱油化株
式会社製）１００重量部、アゾジカルボンアミド１７重
量部、亜鉛華０．０５重量部、ジクミルパーオキサイド
０．７重量部からなる組成物を８５℃のミキシングロー
ルにて練和し、１２５℃に加熱されたプレス内の金を（
３４０Ｘ１７０Ｘ２９ｎ）に充填し、３０分間加圧下で
加熱し、整形品を取り出した。該整形品を開閉式の金型
（１０００ｘ ５００ ｘ １００＊）に入れ、ジャケ
ット方式により、１６０℃の蒸気で１３０分間加熱して
冷却後取り出し、極゛薄気膜を有する独立気泡体を得た
。得られた気泡体は、表皮付の厚みが約１００ｆｆ、み
かけ密度０．０３Ｓｌ／ｄで、表皮をスライスした後の
内部の平均気泡径は約ＩＭで、連続気泡率は６０９６で
あった。Example 4 Ethylene-vinyl acetate copolymer (trade name Yucalon EV)
A-41H, vinyl acetate content 16% by weight, manufactured by Mitsubishi Yuka Co., Ltd.) 100 parts by weight, azodicarbonamide 17 parts by weight, zinc white 0.05 parts by weight, and dicumyl peroxide 0.7 parts by weight. The materials were kneaded with a mixing roll at 85℃, and the gold in the press heated to 125℃ was mixed (
340 x 170 x 29n), heated under pressure for 30 minutes, and the shaped article was taken out. The shaped product was placed in an openable mold (1000 x 500 x 100*), heated with steam at 160°C for 130 minutes using a jacket method, and removed after cooling to obtain a closed cell foam with an extremely thin gas film. . The resulting foam had a thickness with the skin of about 100 ff, an apparent density of 0.03 Sl/d, an average internal cell diameter of about IM after slicing the skin, and an open cell ratio of 6,096.
該気泡体から表皮を除去して、１５０ Ｘ １５０ｘ２
５０ｍの内面気泡体を裁断した。裁断した内面気泡体を
内径３ＱＱＩｆｉＸ長さ１０００ｆｆの高圧容器内に入
れ、高圧容器内に半分水を加えて密閉した。密閉後高圧
容器をジャケット方式により、１２０℃の蒸気で加熱し
、高圧容器内の水温を８０℃に上げた。ついで、エアー
コンプレッサーで８気圧まで加圧し、水温が８０℃を維
持するように蒸気で加熱しながら、３０分間圧力を保持
した後、圧力を一気に常圧まで解放した。Remove the epidermis from the foam and make 150 x 150 x 2
A 50 m inner cell foam was cut. The cut inner foam was placed in a high-pressure container with an inner diameter of 3QQIfiX and a length of 1000 ff, half of which was filled with water, and the container was sealed. After sealing, the high-pressure container was heated with 120°C steam using a jacket method, and the water temperature inside the high-pressure container was raised to 80°C. Next, the pressure was increased to 8 atm using an air compressor, and the pressure was maintained for 30 minutes while heating with steam to maintain the water temperature at 80° C., and then the pressure was released all at once to normal pressure.
取り出した気泡体のサイズは、１５０ Ｘ １５０×２
５０ＭＭで処理前と変わらず、連続気泡率は１００％で
あった。The size of the bubbles taken out is 150 x 150 x 2
At 50 MM, the open cell rate was 100%, unchanged from before treatment.
実施例５
低密度ポリエチレン（商品名 ユカロンＨＥ−３０、密
度０．９２０、メルトフローレート０、３、三菱油化株
式会社製）１００重量部、ファーネス系カーボンブラッ
ク（商品名 ケッチエンブラックＥＣ，ケッチエン働ブ
ラックインターナショナル■製）１３重量部、アゾジカ
ルボンアミド１４重量部、亜鉛華０．１５重量部、ジク
ミルパーオキサイド１．０重量部からなる組成物を１２
０℃のミキシングロールにて練和し、１３０℃に加熱さ
れたプレス内の金型（１５０Ｘ１５０ＸＩＥ１１ｆ）に
練和物を充填し、３０分間加圧下で加熱し、架橋した発
泡性シートを得た。Example 5 100 parts by weight of low density polyethylene (trade name Yucalon HE-30, density 0.920, melt flow rate 0, 3, manufactured by Mitsubishi Yuka Corporation), furnace carbon black (trade name Ketchien Black EC, Ketchien) 12 parts by weight of a composition consisting of 13 parts by weight (manufactured by Work Black International), 14 parts by weight of azodicarbonamide, 0.15 parts by weight of zinc white, and 1.0 parts by weight of dicumyl peroxide.
The mixture was kneaded with a mixing roll at 0° C., and the kneaded product was filled into a mold (150×150×IE11f) in a press heated to 130° C., and heated under pressure for 30 minutes to obtain a crosslinked foamable sheet.
次いで、この発泡性シートを開閉式の金型（３９０ｘ３
９０ｘ５０ｎ）に入れ、ジャケット式により、１６０℃
の蒸気で１５０分加熱して冷却後取り出し、独立気泡体
を得た。得られた独立気泡体は、表皮付の厚みが約９０
ｆｆ、みかけ密度０．０４５Ｆ／ｄ、連続気泡率５３％
表面抵抗値はＩ Ｘ １０’Ωで、表皮をスライスした
後の内部の平均気泡径は約２００μであった。Next, this foam sheet was placed in an openable mold (390 x 3
90x50n) and heated to 160°C by jacket type.
The mixture was heated with steam for 150 minutes, cooled, and then taken out to obtain a closed cell. The resulting closed-cell foam has a thickness of approximately 90 mm with the skin attached.
ff, apparent density 0.045F/d, open cell rate 53%
The surface resistance value was I x 10'Ω, and the average bubble diameter inside after slicing the epidermis was about 200μ.
該気泡体から表皮を除去して、１５０ Ｘ １５０Ｘ２
５０ｆｆｉｌｌの内面気泡体を裁断し、実施例４と同じ
高圧容器内に入れ、高圧容器内に半分水を加えて密閉し
た。密閉後高圧容器をジャケット方式により、１２０℃
の蒸気で加熱し、高圧容器内の水温を９０℃に上げた。After removing the epidermis from the foam, 150×150×2
50 ffill of inner foam was cut and placed in the same high pressure container as in Example 4, half of which was filled with water and sealed. After sealing, the high-pressure container is heated to 120℃ using a jacket method.
The water temperature in the high-pressure vessel was raised to 90°C.
ついで、エアーコンプレッサーで８気圧まで加圧し、水
温が９０℃を維持するように蒸気で加熱しながら、３０
分間圧力を保持した後、圧力を一気に常圧まで解放した
。Next, pressurize the water to 8 atmospheres with an air compressor and heat it with steam to maintain the water temperature at 90°C for 30 minutes.
After holding the pressure for a minute, the pressure was released all at once to normal pressure.
取り出した気泡体のサイズは、１５０ Ｘ １５０×２
５０ＩｒＩＩで処理前と変わらず、連続気泡率は１００
％であり、表面抵抗値に変化はなかった。The size of the bubbles taken out is 150 x 150 x 2
With 50IrII, the open cell ratio is 100, unchanged from before treatment.
%, and there was no change in surface resistance value.
以上のように、本発明のプラスチック連続気泡体の製造
方法は、気泡の格子に負荷をかけることな（気泡膜を連
通化せしめるので、気泡体の厚みが減少しない。又、一
般的な独立気泡体から連続気泡率１００％の気泡体を確
実に得ることができる。As described above, the method for manufacturing open-cell plastic cells of the present invention does not impose any load on the cell lattice (the cell membrane is made open, so the thickness of the cell does not decrease. A foam with an open cell rate of 100% can be reliably obtained from the body.
したがって、本発明の方法によって得られる連続気泡体
は、目地材、フィルター、吸音材として好適に利用され
る。Therefore, the open-celled foam obtained by the method of the present invention is suitably used as a joint material, a filter, and a sound absorbing material.
特許出願人 三和化工株式会社 代表者 吉１） 巌Patent applicant: Sanwa Kako Co., Ltd. Representative Yoshi 1) Iwao
Claims (2)
圧下で放置した後除圧することによって、気泡膜を破壊
して連続気泡構造を得ることを特徴とするプラスチック
連続気泡体の製造方法。(1) A method for producing a plastic open cell, which comprises leaving the plastic closed cell under pressure with a gas or liquid and then removing the pressure to destroy the cell membrane and obtain an open cell structure.
。(2) The method according to claim 1, wherein the pressurized temperature is higher than room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP833789A JPH02188233A (en) | 1989-01-17 | 1989-01-17 | Manufacture of plastic open cell body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP833789A JPH02188233A (en) | 1989-01-17 | 1989-01-17 | Manufacture of plastic open cell body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02188233A true JPH02188233A (en) | 1990-07-24 |
Family
ID=11690383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP833789A Pending JPH02188233A (en) | 1989-01-17 | 1989-01-17 | Manufacture of plastic open cell body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02188233A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100324520B1 (en) * | 1999-07-09 | 2002-02-16 | 구자홍 | the manufacture method of vaccum insulation material core |
| US6541105B1 (en) | 1999-09-16 | 2003-04-01 | Dow Global Technologies Inc. | Acoustical open-cell polylefins and process for making |
| US6583193B2 (en) | 2000-03-17 | 2003-06-24 | Dow Global Technologies Inc. | Polyolefin foam useful for sound and thermal insulation |
| US6590006B2 (en) | 2000-03-17 | 2003-07-08 | Dow Global Technologies Inc. | Macrocellular polyolefin foam having a high service temperature for acoustical applications |
| US6720362B1 (en) | 1998-09-17 | 2004-04-13 | The Dow Chemical Company | Perforated foams |
| GB2401108A (en) * | 2003-05-02 | 2004-11-03 | Sun Own Ind Co Ltd | Vacuum cell bursting method |
| US7018700B2 (en) | 2000-03-17 | 2006-03-28 | Dow Global Technologies Inc. | Acoustic absorption polymer foam having improved thermal insulating performance |
| US7384490B2 (en) * | 2003-10-08 | 2008-06-10 | Mitsumagiken Co. Ltd. | Method for manufacturing open cell rubber material and method for manufacturing rubber roller |
-
1989
- 1989-01-17 JP JP833789A patent/JPH02188233A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6720362B1 (en) | 1998-09-17 | 2004-04-13 | The Dow Chemical Company | Perforated foams |
| US6949588B2 (en) | 1998-09-17 | 2005-09-27 | Dow Global Technologies Inc. | Perforated foams |
| KR100324520B1 (en) * | 1999-07-09 | 2002-02-16 | 구자홍 | the manufacture method of vaccum insulation material core |
| US6541105B1 (en) | 1999-09-16 | 2003-04-01 | Dow Global Technologies Inc. | Acoustical open-cell polylefins and process for making |
| US6583193B2 (en) | 2000-03-17 | 2003-06-24 | Dow Global Technologies Inc. | Polyolefin foam useful for sound and thermal insulation |
| US6590006B2 (en) | 2000-03-17 | 2003-07-08 | Dow Global Technologies Inc. | Macrocellular polyolefin foam having a high service temperature for acoustical applications |
| US7018700B2 (en) | 2000-03-17 | 2006-03-28 | Dow Global Technologies Inc. | Acoustic absorption polymer foam having improved thermal insulating performance |
| GB2401108A (en) * | 2003-05-02 | 2004-11-03 | Sun Own Ind Co Ltd | Vacuum cell bursting method |
| US7384490B2 (en) * | 2003-10-08 | 2008-06-10 | Mitsumagiken Co. Ltd. | Method for manufacturing open cell rubber material and method for manufacturing rubber roller |
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