JPS6328771B2 - - Google Patents
Info
- Publication number
- JPS6328771B2 JPS6328771B2 JP54171406A JP17140679A JPS6328771B2 JP S6328771 B2 JPS6328771 B2 JP S6328771B2 JP 54171406 A JP54171406 A JP 54171406A JP 17140679 A JP17140679 A JP 17140679A JP S6328771 B2 JPS6328771 B2 JP S6328771B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- foam
- parts
- weight
- eva
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000006260 foam Substances 0.000 claims description 44
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 33
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 33
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 239000003431 cross linking reagent Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 5
- 239000004088 foaming agent Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 238000005187 foaming Methods 0.000 description 16
- 239000004604 Blowing Agent Substances 0.000 description 11
- 239000004620 low density foam Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000004156 Azodicarbonamide Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 3
- 235000019399 azodicarbonamide Nutrition 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 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 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- YUJXLBCNMLSZFM-UHFFFAOYSA-N (2-azidophenyl)-phenyldiazene Chemical compound [N-]=[N+]=NC1=CC=CC=C1N=NC1=CC=CC=C1 YUJXLBCNMLSZFM-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004619 high density foam Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000003381 stabilizer Substances 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明はエチレン−酢酸ビニル共重合体（以
下、EVAという）とポリ塩化ビニル樹脂の複合
発泡体の製法に関し、特にその低密度発泡体の製
法に係るものである。従来から、EVAの発泡体
はすでに公知で、その耐摩耗性、曲げ強度にすぐ
れているところから、サンダルの底、靴底その他
の主に耐摩耗性の要求される資材に用いられて来
たが、EVAと塩化ビニル樹脂との複合発泡体に
至つては従来から全くといつてよい程製造されて
来なかつた。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a composite foam of an ethylene-vinyl acetate copolymer (hereinafter referred to as EVA) and a polyvinyl chloride resin, and particularly to a method for producing the low-density foam. EVA foam has long been known, and due to its excellent abrasion resistance and bending strength, it has been used for sandal soles, shoe soles, and other materials that require abrasion resistance. However, until now, composite foams of EVA and vinyl chloride resin have not been produced at all.
そこでまず塩化ビニルを含まないEVA発泡体
についてみれば、この発泡体は強度ならびに耐摩
耗性、接着性が優れているところから各方面のク
ツシヨンとして期待されて来たが、現実にはその
用途もこれまで全く限られていた。その理由は
EVAの高発泡成形がこれまでの技術では不可能
で、低発泡、高密度発泡体のみしか得られないた
めであつた。即ち、EVAの発泡体は、発泡剤、
架橋剤を混練したシート状原料を、成形型に略
100パートの容積で充填し加熱発泡させて成形し
ている。しかしながら、こうした成形に際し、
EVA発泡体は型内で著るしく加圧状態を起し、
これの脱型に際し極端な体積膨張を起し、これが
原因して気泡体の炸裂、飛散という現象を起すこ
とがあるためである。こうしたことを回避するた
め、従来、EVAの発泡体の製造に当つて発泡剤
の使用量を極力少なくして低発泡とし、得られる
気泡体の密度も0.4〜0.3といつた高密度としなけ
ればならなかつた。 First, let's look at EVA foam, which does not contain vinyl chloride.This foam has been expected to be used as a cushion in various fields due to its excellent strength, abrasion resistance, and adhesiveness, but in reality, its applications are limited. Until now it has been completely limited. The reason is
This was because it was impossible to mold EVA with high foaming using conventional techniques, and only low-foaming, high-density foams could be obtained. That is, the EVA foam contains a blowing agent,
The sheet-like raw material kneaded with a cross-linking agent is placed in a mold.
It is filled with a volume of 100 parts and heated and foamed to form it. However, during such molding,
EVA foam generates significant pressure inside the mold,
This is because when demolding the mold, extreme volume expansion occurs, which may cause explosion and scattering of the bubbles. To avoid this, conventionally, when producing EVA foam, the amount of blowing agent used was minimized to achieve low foaming, and the resulting foam had a high density of 0.4 to 0.3. It didn't happen.
以上の如く、EVA発泡体が低発泡、高密度品
のみしか製造出来なかつた以上、これに他の発泡
体原料を添加してEVA発泡体の物性を更に改良
した高発泡体、低密度発泡体を得るということは
一層困難なこととされていた。然るに発明者らは
先にEVAの著るしい高発泡体、低密度発泡体の
製法を開発したことに関連して、この技術を利用
することによつて、エチレン−酢酸ビニル共重合
体と塩化ビニル樹脂との低密度複合発泡体を製造
する技術を確立した。これによるならばEVAの
優れた特性の上に、更に塩化ビニルの柔軟性を加
えた全く新しい高発泡、低密度発泡体が得られる
ことになる。 As mentioned above, since only low-foaming, high-density EVA foams can be manufactured, high-foaming and low-density foams are produced by adding other foam raw materials to further improve the physical properties of EVA foams. It was considered even more difficult to obtain this. However, in connection with the fact that the inventors had previously developed a method for producing EVA foams with significantly high foaming and low density, by utilizing this technology, the inventors developed a method for producing ethylene-vinyl acetate copolymer and chloride foam. We have established a technology to produce low-density composite foams with vinyl resin. If this were done, a completely new high-foam, low-density foam would be obtained, which has the excellent properties of EVA and the flexibility of vinyl chloride.
即ちこの発明は、成形型内に、エチレン−酢酸
ビニル共重合体100重量部に対しポリ塩化ビニル
樹脂ペースト５〜50重量部、発泡剤20〜70重量
部、架橋剤1.0〜5.0重量部をそれぞれ添加、混ね
りした発泡体原料を充填し、その後この成形型を
被蓋で強固に閉塞し、ついでこれを加熱して発泡
体を成形させて該発泡体を型内で加圧状態とし、
しかるのち前記発泡成形体を型内に保持したまま
で冷却し、その後成形型の被蓋を開放することを
特徴としたエチレン−酢酸ビニル共重合体と塩化
ビニル樹脂との低密度複合発泡体の製造方法であ
る。以下、この発明の詳細を説明する。 That is, in the present invention, 5 to 50 parts by weight of polyvinyl chloride resin paste, 20 to 70 parts by weight of a blowing agent, and 1.0 to 5.0 parts by weight of a crosslinking agent are respectively added to 100 parts by weight of ethylene-vinyl acetate copolymer. Filling with the added and kneaded foam raw materials, then tightly closing this mold with a cover, and then heating it to mold the foam and pressurize the foam in the mold,
Thereafter, the foam molded product is cooled while being held in the mold, and then the cover of the mold is opened. This is the manufacturing method. The details of this invention will be explained below.
この発明に用いられる主原料の一つのエチレン
−酢酸ビニル共重合体は、任意のコンパウンドの
ものが用いられるが、通常エチレン100に対し酢
酸ビニル10〜40の比のものが使用される。他の主
原料である塩化ビニルペーストは、例えばペース
トレジン100重量部に可塑剤50〜150重量部、安定
剤３〜８重量部を配合してなるものである。
EVAと塩化ビニルペースとの割合は、前者100重
量部に対し５〜50重量部とする。これが５重量部
に達しないと塩化ビニルを添加した場合の柔軟性
が十分期待出来ない。50重量部を起えるとEVA
の比率が少なくなり腰の強い発泡体が得られな
い。上記の原料には発泡剤、架橋剤その他を添加
して、これを例えばロールで十分混練してシート
とする。ここに用いる発泡剤は、従来のEVA発
泡体、塩化ビニル発泡体に用いられているものが
そのまま用いられる。例えばアソジカーボンアミ
ド、ジニトロソペンタメチレンテトラミン、ジア
ゾアミノアゾベンゼン等である。この発泡剤は、
EVAと塩化ビニルペーストとの合量100重量部に
対し20〜70重量部好ましくは20〜50重量部とす
る。これが20重量部に末たないと高発泡、低密度
の気泡体が出来ず、また70部以上であると発泡過
程において気泡体の型くづれ、飛散の兆侯が現わ
れる。従来のEVA発泡体の製造における発泡剤
の使用量が３〜５重量部であつたことからすれ
ば、発泡剤の添加量が大巾に増大していることが
この発明の特色の一つとなつている。発泡剤の外
には架橋剤を添加する。架橋剤としては有機過酸
化物、例えばジクミロパーオキサイド、2.5−ジ
メチル−2.5ジ（ターシヤリ−ブチル）パーオキ
サイド等が使用出来る。これの添加量は、発泡剤
の使用量とも関連するが、EVAと塩化ビニルペ
ーストとの合量100重量部に対し１〜５重量部、
好ましくは１〜２重量部とする。これが１重量部
に末たないと十分な架橋が行なわれず腰の強い気
泡体が得られず、反対し５重量部を超えると柔軟
性を欠くものとなる。その他の添加剤としては、
発泡助剤としての尿素、アミン、外に着色剤、充
填剤をあげることが出来る。上記の添加剤の中、
発泡剤、架橋剤は塩化ビニルペーストの中に予め
添加しておくことも出来る。 The ethylene-vinyl acetate copolymer, which is one of the main raw materials used in this invention, can be of any compound, but is usually used in a ratio of 100 parts of ethylene to 10 to 40 parts of vinyl acetate. The other main raw material, vinyl chloride paste, is made by blending, for example, 100 parts by weight of paste resin with 50 to 150 parts by weight of a plasticizer and 3 to 8 parts by weight of a stabilizer.
The ratio of EVA and vinyl chloride paste is 5 to 50 parts by weight per 100 parts by weight of the former. If this amount does not reach 5 parts by weight, sufficient flexibility cannot be expected when vinyl chloride is added. EVA with 50 parts by weight
Since the ratio of the foam is too low, a stiff foam cannot be obtained. A foaming agent, a crosslinking agent, and the like are added to the above-mentioned raw materials, and this is sufficiently kneaded, for example, with a roll, to form a sheet. The blowing agent used here is the same as that used in conventional EVA foams and vinyl chloride foams. Examples include asodicarbonamide, dinitrosopentamethylenetetramine, diazoaminoazobenzene, and the like. This blowing agent is
The amount is preferably 20 to 70 parts by weight, preferably 20 to 50 parts by weight, per 100 parts by weight of the total amount of EVA and vinyl chloride paste. If the amount is less than 20 parts by weight, a highly foamed, low-density foam will not be produced, and if it is more than 70 parts, the foam will lose its shape and show signs of scattering during the foaming process. Considering that the amount of blowing agent used in the production of conventional EVA foam was 3 to 5 parts by weight, one of the features of this invention is that the amount of blowing agent added is greatly increased. ing. A crosslinking agent is added in addition to the blowing agent. As the crosslinking agent, organic peroxides such as dicumyl peroxide, 2.5-dimethyl-2.5 di(tertiary-butyl) peroxide, etc. can be used. The amount added is related to the amount of blowing agent used, but it is 1 to 5 parts by weight per 100 parts by weight of the total amount of EVA and vinyl chloride paste.
Preferably it is 1 to 2 parts by weight. If the amount is less than 1 part by weight, sufficient crosslinking will not occur and a stiff foam will not be obtained, whereas if it exceeds 5 parts by weight, the foam will lack flexibility. Other additives include:
Examples include urea and amines as foaming aids, as well as colorants and fillers. Among the above additives,
The foaming agent and crosslinking agent can also be added to the vinyl chloride paste in advance.
上記の混合原料はロールその他の混練機で十分
混練したのち、これをシート状とし、所定の形状
に切断してこれを成形型の中に充填する。ここに
用いる成形型は任意でよいが、発泡成形品の脱型
に当つて製品が一挙に型内から飛出すので、上広
形の開口部を有しているものがよい。発泡原料シ
ートは成形型に略充満するか、ややこれを押圧す
るように充填してから型に被蓋をしてこれを強固
に固定する。被蓋の固定方法は任意でよいが、型
蓋の開閉を自在に出来、しかも閉型を強固に行な
うのに便利な方法は、プレス機を用い、その先端
に型の被蓋を装着し、これで型の開閉を行なう方
法である。被蓋で閉型したのちはただちにこれを
加熱して発泡させる。加熱温度は、使用した発泡
剤の分解温度によつて定まるが、大体160〜180℃
前後である。次に、発泡が十分完了したところ
で、これをそのままで一たん冷却する。ここにお
ける冷却温度は、使用する原料、すなわちEVA
の酢酸ビニルのコンテスト、EVAと塩化ビニル
ペーストの割合、発泡剤の種類およびその使用
量、加橋剤の種類およびその使用量、その他によ
つて定まるもので一律に定めることは出来ない
が、大体加熱発泡時の温度よりも50〜60℃程度低
い80〜130℃がよい。この冷却は、強制冷却とし
て、例えば金型のジヤケツトに冷却水を送るなど
して行なう。この冷却によつて、EVA発泡体の
充満された型の内圧は低下すると考えられるが、
これはEVAの発泡時発生した蒸気圧が１時的な
温度低下によつて減少するためと推察される。こ
の状態を経て成形型は開放されるが、これによつ
てEVA発泡体は型内から飛出す状態で脱形され
る。その瞬間発泡体の体積は15〜50倍にも膨張さ
れる。これによつて本願発明の発泡体が一挙に出
来上ることになる。こうして出来た気泡体は密度
が0.02〜0.05にも達し、また発泡倍率も15〜50倍
にもなる。これを例えば従来のEVA発泡体と対
比してみると、これまでのものは、密度0.3〜
0.4、発泡倍率2.5〜５であつたから、本発明によ
つて得られたものが格段に高発泡、低密度品であ
ることが判る。 The above-mentioned mixed raw material is sufficiently kneaded using a roll or other kneading machine, then formed into a sheet, cut into a predetermined shape, and filled into a mold. Any mold may be used here, but it is preferable that the mold has a wide opening at the top, since the product will fly out of the mold all at once when the foamed molded product is demolded. The foamed raw material sheet is filled into the mold so as to substantially fill it or press it slightly, and then the mold is covered and firmly fixed. You can fix the cover in any way you like, but a convenient way to open and close the mold cover freely and to securely close the mold is to use a press and attach the mold cover to the tip of the press. This is how to open and close the mold. After the mold is closed with a lid, it is immediately heated and foamed. The heating temperature is determined by the decomposition temperature of the blowing agent used, but is approximately 160 to 180℃.
Before and after. Next, once the foaming has been sufficiently completed, the mixture is cooled as it is. The cooling temperature here is based on the raw material used, namely EVA
Although it cannot be determined uniformly, it is determined by the vinyl acetate contest, the ratio of EVA and vinyl chloride paste, the type of blowing agent and its usage amount, the type of crosslinking agent and its usage amount, and others. The temperature is preferably 80 to 130°C, which is about 50 to 60°C lower than the temperature during heating and foaming. This cooling is performed as forced cooling, for example, by sending cooling water to the jacket of the mold. This cooling is thought to reduce the internal pressure of the mold filled with EVA foam;
This is presumed to be because the vapor pressure generated during foaming of EVA decreases due to the temporary temperature drop. After this state, the mold is opened, and as a result, the EVA foam is ejected from the mold. The volume of the instant foam is expanded 15 to 50 times. As a result, the foam of the present invention is completed all at once. The foam thus produced has a density of 0.02 to 0.05, and an expansion ratio of 15 to 50 times. Comparing this with, for example, conventional EVA foam, the density of conventional EVA foams ranges from 0.3 to
Since the foaming ratio was 0.4 and the foaming ratio was 2.5 to 5, it can be seen that the product obtained by the present invention is a product with significantly higher foaming and lower density.
この発明方法によると、成形に際し脱型に先立
つて、一たん冷却しているために、型の内圧が低
下し、かつ型内の気泡体がゲル化傾向にあると推
察される原因で多量の発泡剤を使用した高発泡、
低密度の気泡体であつても、脱形に当つての炸
裂、飛散という現象を併なうことなく製造するこ
とが可能となつた。 According to the method of this invention, during molding, the internal pressure of the mold decreases because it is cooled once before demolding, and it is assumed that the bubbles in the mold tend to gel. High foaming using foaming agents,
It has become possible to manufacture even low-density foams without experiencing explosion or scattering phenomena during demolding.
この発明方法によつて製造されるエチレン−酢
酸ビニル共重合体と塩化ビニル樹脂との低密度複
合発泡体は、高発泡、低密度のうえに塩化ビニル
を含むために、反撥弾性、腰の強さに加えて著る
しく柔軟性を見備し、その特性は後記実施例が示
すように、ポリウレタンフオーム、ポリエチレン
フオームといつた従来の気泡体には見られないも
のがある。更に、この発泡体は接着性にもすぐ
れ、この点からもその利用分野は一層拡大される
ことになる。具体的には車輛用クツシヨン、家具
用クツシヨンその他の産業資材に広く用いられ
る。 The low-density composite foam of ethylene-vinyl acetate copolymer and vinyl chloride resin produced by the method of this invention has high foaming, low density, and contains vinyl chloride, so it has excellent rebound resilience and stiffness. In addition to this, it has remarkable flexibility, and as shown in the Examples below, it has properties not found in conventional foams such as polyurethane foam and polyethylene foam. Furthermore, this foam has excellent adhesive properties, and from this point of view, its field of use will be further expanded. Specifically, it is widely used in vehicle cushions, furniture cushions, and other industrial materials.
実施例
EVA（VAコンテスト14％） 70重量部
塩ビニルレジン 15
ジオクチルフタレート 15
ステアリン酸亜鉛 3.0
アゾジカーボンアミド 20
ジクミルパーオキサイド 2.5
上記原料中、あらかじめ塩ビレジンとジオクチ
ルフタレートをニーダーにてペーストとし、続い
てアゾジカーボンアミドを除いて表面温度90℃の
ロールにて５分間混練し、これにアゾジカーボン
アミドを添加し再び４分間混練して厚さ２mmのシ
ートとした。これを深さ８mmで、タテ、ヨコ25cm
の内形状、上部開口が45゜に上広形の金型に４枚
入れて蓋をし、プレス機にて150Kg／cm2の圧力で
押え、そのままプレス機のジヤケツトに加熱蒸気
を入れて170℃に加熱し12分間保持した。その後
前記プレス機の加熱蒸気を除去し代りに水を入れ
て冷却して金型側温を80℃に冷却した。しかるの
ちプレス機を開放したところ、気泡体が金型から
一挙に上方に飛出して来た。このものの密度を測
定したところ、0.028ｇ／cm2で外形も均一であつ
た。またこのものをＣタイプ硬度計で測定したと
ころ６〜７であつた。Example EVA (VA contest 14%) 70 parts by weight Vinyl chloride resin 15 Dioctyl phthalate 15 Zinc stearate 3.0 Azodicarbonamide 20 Dicumyl peroxide 2.5 Among the above raw materials, vinyl chloride resin and dioctyl phthalate were made into a paste in a kneader in advance, and then After removing the azodicarbonamide, the mixture was kneaded for 5 minutes using rolls with a surface temperature of 90°C, and the azodicarbonamide was added thereto and kneaded again for 4 minutes to form a sheet with a thickness of 2 mm. This is 8mm deep and 25cm vertically and horizontally.
Put the four pieces into a mold with a wide top opening of 45 degrees, cover it, press it with a press at a pressure of 150 kg/cm 2 , and then put heated steam into the jacket of the press to make it 170 mm. ℃ and held for 12 minutes. Thereafter, the heated steam from the press was removed and water was added instead to cool the mold to bring the temperature on the side of the mold to 80°C. When the press was then opened, bubbles suddenly flew upwards from the mold. When the density of this product was measured, it was found to be 0.028 g/cm 2 and the outer shape was uniform. Moreover, when this product was measured with a C type hardness meter, it was 6 to 7.
なお、原料中の塩化ビニルレジンとステアリン
酸亜鉛を欠除する外は上記実施例と全く同様に実
施したものを同様な方法で硬度を測定したところ
13〜15であつた。 The hardness was measured in the same manner as in the above example except that the vinyl chloride resin and zinc stearate in the raw materials were omitted.
It was 13-15.
Claims (1)
100重量部とポリ塩化ビニル樹脂ペースト５〜50
重量部との混合物に発泡剤20〜100重量部、架橋
剤1.0〜5.0重量部をそれぞれ添加、混ねりした発
泡体原料を充填し、その後この成形型を被蓋で強
固に閉塞し、ついでこれを加熱して発泡体を成形
させて該発泡体を型内で加圧状態とし、しかるの
ち前記発泡成形体を型内に保持したままで冷却
し、その後成形型の被蓋を開放することを特徴と
したエチレン−酢酸ビニル共重合体と塩化ビニル
樹脂との低密度複合発泡体の製法。1 Inside the mold, ethylene-vinyl acetate copolymer
100 parts by weight and 5-50 parts of polyvinyl chloride resin paste
20 to 100 parts by weight of a foaming agent and 1.0 to 5.0 parts by weight of a crosslinking agent are added to the mixture with 1.0 to 1.0 parts by weight, and the mixed foam raw materials are filled, and the mold is then tightly closed with a lid. is heated to form a foam, the foam is pressurized in a mold, and then the foam molded product is cooled while being held in the mold, and then the cover of the mold is opened. A method for producing a low-density composite foam of ethylene-vinyl acetate copolymer and vinyl chloride resin.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17140679A JPS5692032A (en) | 1979-12-27 | 1979-12-27 | Preparation of low density composite foamed substance of ethylene-vinyl acetate copolymer vinyl chloride resin |
| US06/152,784 US4338271A (en) | 1979-05-28 | 1980-05-23 | Method for manufacturing a low density synthetic resin body |
| CA000352851A CA1141100A (en) | 1979-05-28 | 1980-05-26 | Low density synthetic resin foamed body and manufacturing method therefor |
| AU58803/80A AU535902B2 (en) | 1979-05-28 | 1980-05-27 | Ethylene-vinyl acetate copolymer foamed body |
| DE8080102967T DE3070376D1 (en) | 1979-05-28 | 1980-05-28 | A method for manufacturing a low density synthetic resin foamed body |
| EP80102967A EP0019910B1 (en) | 1979-05-28 | 1980-05-28 | A method for manufacturing a low density synthetic resin foamed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17140679A JPS5692032A (en) | 1979-12-27 | 1979-12-27 | Preparation of low density composite foamed substance of ethylene-vinyl acetate copolymer vinyl chloride resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5692032A JPS5692032A (en) | 1981-07-25 |
| JPS6328771B2 true JPS6328771B2 (en) | 1988-06-09 |
Family
ID=15922551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17140679A Granted JPS5692032A (en) | 1979-05-28 | 1979-12-27 | Preparation of low density composite foamed substance of ethylene-vinyl acetate copolymer vinyl chloride resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5692032A (en) |
-
1979
- 1979-12-27 JP JP17140679A patent/JPS5692032A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5692032A (en) | 1981-07-25 |
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