JPH0762130A - Production of rubber foam - Google Patents
Production of rubber foamInfo
- Publication number
- JPH0762130A JPH0762130A JP21616993A JP21616993A JPH0762130A JP H0762130 A JPH0762130 A JP H0762130A JP 21616993 A JP21616993 A JP 21616993A JP 21616993 A JP21616993 A JP 21616993A JP H0762130 A JPH0762130 A JP H0762130A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- sheet
- weight
- styrene
- 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明はゴム系発泡体の製造方
法に関し、特に衝撃吸収材、車の真中の制振材、マット
の下敷等に有用なゴム系発泡体の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a rubber-based foam, and more particularly to a method for producing a rubber-based foam useful as an impact absorbing material, a vibration damping material in the middle of a car, an underlay of a mat and the like.
【０００２】[0002]
【従来の技術】周知の如く、従来のゴム系発泡体は、天
然ゴム，ＳＢＲ，ＮＢＲ，ＣＲ，ＥＰＤＭ等の合成ゴム
を主原料とし、加硫剤，発泡剤，促進剤，軟化剤等を混
合し、プレス機により加熱加圧して製造されている。2. Description of the Related Art As is well known, conventional rubber-based foams are mainly composed of synthetic rubber such as natural rubber, SBR, NBR, CR and EPDM, and contain vulcanizing agents, foaming agents, accelerators, softening agents and the like. It is manufactured by mixing and heating and pressing with a press.
【０００３】[0003]
【発明が解決しようとする課題】ところで、従来、上述
したゴム材料等を用いてゴム系発泡体が作られている
が、ゴム材料としては高反発性のスポンジが用いられて
いるため、ゴム発泡体に衝突したものを該発泡体の外に
跳ね返すものであった。つまり、衝撃を内に吸収するよ
うなゴム系発泡体は、従来存在しなかった。By the way, conventionally, a rubber-based foam has been produced by using the above-mentioned rubber material or the like. However, since a high-resilience sponge is used as the rubber material, the rubber foam is used. What hit the body bounced back out of the foam. That is, there has been no rubber-based foam that absorbs an impact.
【０００４】この発明はこうした事情を考慮してなされ
たもので、制振性能に優れるとともに、復元速度が遅く
て衝撃吸収性に優れ、かつ熱可塑性樹脂と相溶性が良い
ゴム系発泡体の製造方法を提供することを目的とする。The present invention has been made in consideration of the above circumstances, and produces a rubber-based foam which is excellent in vibration damping performance, has a low restoration speed and is excellent in shock absorption, and has good compatibility with a thermoplastic resin. The purpose is to provide a method.
【０００５】[0005]
【課題を解決するための手段】この発明は、ビニル構造
のポリイソプレンブロックを有するスチレン・イソプレ
ン・スチレン構造のブロックポリマーを５０％以上含む
ゴム又はゴムとプラスチックの混合物を主原料とし、こ
れに加硫剤，発泡剤，促進剤，軟化剤あるいは更に滑
剤，充填剤，顔料，老化防止剤を添加、混練り、シート
状とした後、金型に入れてプレス機により加熱加圧し、
プレスを開放して得られることを特徴とするゴム系発泡
体の製造方法である。SUMMARY OF THE INVENTION According to the present invention, a rubber or a mixture of rubber and plastic containing 50% or more of a styrene / isoprene / styrene structure block polymer having a vinyl structure polyisoprene block is used as a main raw material. Sulfurizing agent, foaming agent, accelerator, softening agent or further lubricant, filler, pigment, anti-aging agent are added, kneaded and formed into a sheet, which is then put into a mold and heated and pressed by a press machine,
A method for producing a rubber-based foam, which is obtained by opening a press.
【０００６】この発明において、ビニル構造のポリイソ
プレンブロックを有するスチレン・イソプレン・スチレ
ン構造（以下、ＳＩＳ構造と呼ぶ）のブロックポリマー
と混合する他の原料は、１、２ポリブタジエンゴム，Ｎ
ＢＲ，ＣＲ，ＥＰＤＭ等の合成ゴムや、ＥＶＡ，ポリエ
チレン，ポリプロピレン等の熱可塑性樹脂が使用でき
る。なかでも、相溶性の良いブタジエン系ゴムや熱可塑
性樹脂が適している。In the present invention, the other raw material to be mixed with the block polymer having a styrene-isoprene-styrene structure (hereinafter referred to as SIS structure) having a vinyl-structured polyisoprene block is 1,2 polybutadiene rubber, N.
Synthetic rubbers such as BR, CR and EPDM and thermoplastic resins such as EVA, polyethylene and polypropylene can be used. Among them, butadiene-based rubber and thermoplastic resin having good compatibility are suitable.
【０００７】この発明において、発泡剤としては、例え
ばアゾジカーボンアミド、ジニトロソペンタメチレンテ
トラミン等の通常の有機発泡剤が挙げられる。この発明
において、軟化剤としては、例えばフタル酸ジオクチル
（ＤＯＰ），フタル酸ジブチル（ＤＢＰ）等の可塑剤、
パラフィン系オイル、ナフテン系オイルが挙げられる。
また、加硫剤としては、硫黄，過酸化物等が併用され
る。加硫剤，発泡剤は一番最後に添加するのが好まし
い。In the present invention, examples of the foaming agent include usual organic foaming agents such as azodicarbonamide and dinitrosopentamethylenetetramine. In the present invention, examples of the softening agent include plasticizers such as dioctyl phthalate (DOP) and dibutyl phthalate (DBP),
Paraffin-based oils and naphthene-based oils are included.
Further, as the vulcanizing agent, sulfur, peroxide and the like are used together. The vulcanizing agent and the foaming agent are preferably added last.
【０００８】この発明において、滑剤としては、例えば
ステアリン酸、ステアリン酸亜鉛が挙げられる。この発
明において、充填剤としては、例えば炭酸カルシウム、
クレー、タルク、カーボンが挙げられる。In the present invention, examples of the lubricant include stearic acid and zinc stearate. In the present invention, examples of the filler include calcium carbonate,
Examples include clay, talc, and carbon.
【０００９】この発明において、原料に加硫剤等を加え
て混練りする際の混練りロールに加温する温度は、混合
樹脂により異なるが略７０〜１００℃が好ましい。この
発明において、プレス機によりシート状にした原料を加
熱加圧する条件は、温度１５０〜１７０℃，加圧時間１
５〜２５分程度が好ましいが、これに限定されるもので
はない。In the present invention, the temperature for heating the kneading rolls when kneading by adding the vulcanizing agent or the like to the raw materials varies depending on the mixed resin, but is preferably about 70 to 100 ° C. In the present invention, the conditions for heating and pressurizing the sheet-shaped raw material by the press machine are a temperature of 150 to 170 ° C. and a pressurizing time of 1
It is preferably about 5 to 25 minutes, but not limited to this.
【００１０】この発明において、前記ブロックポリマー
の含有量を５０％以上としたのは、５０％未満では制振
性能，衝撃吸収性などの目的とする性質が低下するから
である。In the present invention, the content of the block polymer is set to 50% or more because when the content is less than 50%, desired properties such as vibration damping performance and impact absorption are deteriorated.
【００１１】[0011]
【作用】この発明において、本ブロックポリマーは常温
付近にガラス転移点を持つため、この温度領域にて振動
エネルギーを熱エネルギーに変換するため、(1) 制振性
能に優れる、(2) 復元速度が遅くて衝撃吸収性に優れ
る、及び(3) 熱可塑性のため熱可塑性樹脂と相溶性が良
い、という利点を有する。In this invention, since this block polymer has a glass transition point near room temperature, it converts vibrational energy into thermal energy in this temperature range. Therefore, (1) excellent vibration damping performance, (2) restoration speed Is slow and has excellent impact absorption, and (3) it has good compatibility with a thermoplastic resin due to its thermoplasticity.
【００１２】[0012]
【実施例】以下、この発明の実施例について説明する。 （実施例１） ＳＩＳブロックポリマー（商品名：ＶＳ−１、クラレ社製） １００重量％ ステアリン酸（滑剤） １重量％ ＤＯＰ（軟化剤） １５重量％ 炭酸カルシウム（充填剤） ５０重量％ 亜鉛華 ３重量％ アゾジカーボンアミド（発泡剤） ６重量％ 加硫促進剤 ０．８重量％ 硫黄（加硫剤） １．５重量％ まず、ロールを８０〜９０℃に加熱しアゾジカーボンア
ミドを除いて原料を混練りした後、最後にアゾジカーボ
ンアミドを添加し混練りして発泡原料とした。そして、
厚さ３mmのシート状にし、１３０mm×１３０mmにカット
し、１５mm×１５０mm×１５０mmの金型に７枚充填した
後、１５５℃にて１８分間加熱加圧した後、発泡させ
た。得られた発泡体は２５mm×２８０mm×２８０mm，密
度０．２ｇ／cm3 ，硬さ２０（ｃ−タイプ），反発弾性
５の衝撃吸収性に優れた発泡体であった。Embodiments of the present invention will be described below. (Example 1) SIS block polymer (trade name: VS-1, manufactured by Kuraray Co., Ltd.) 100% by weight Stearic acid (lubricant) 1% by weight DOP (softening agent) 15% by weight Calcium carbonate (filler) 50% by weight Zinc white 3% by weight Azodicarbonamide (foaming agent) 6% by weight Vulcanization accelerator 0.8% by weight Sulfur (vulcanizing agent) 1.5% by weight First, a roll is heated to 80 to 90 ° C. to form azodicarbonamide. After excluding and kneading the raw material, finally, azodicarbonamide was added and kneaded to obtain a foaming raw material. And
A sheet having a thickness of 3 mm was cut, cut into 130 mm × 130 mm, and 7 pieces were filled in a mold of 15 mm × 150 mm × 150 mm, heated and pressed at 155 ° C. for 18 minutes, and then foamed. The obtained foam was 25 mm × 280 mm × 280 mm, density 0.2 g / cm 3 , hardness 20 (c-type), and impact resilience 5 excellent in impact absorption.
【００１３】このように、実施例１によれば、ブロック
ポリマーが常温付近にガラス転移点を持つため、この温
度領域にて振動エネルギーを熱エネルギーに変換するた
め、(1) 制振性能に優れる、(2) 復元速度が遅くて衝撃
吸収性に優れる、及び(3) 熱可塑性のため熱可塑性樹脂
と相溶性が良い、という種々の利点を有する。事実、実
施例１に係るゴム系発泡体と従来のゴム系発泡体につい
て反発距離と時間との関係を調べたところ、図１に示す
ような結果が得られた。この図１より、この発明に係る
ゴム系発泡体とが従来のそれと比べ小さい反発弾性をも
つことが明らかである。As described above, according to Example 1, since the block polymer has a glass transition point in the vicinity of room temperature, the vibration energy is converted into heat energy in this temperature range, and therefore (1) it has excellent vibration damping performance. And (2) the recovery speed is slow and the shock absorption is excellent, and (3) the thermoplastic resin has various compatibility with the thermoplastic resin and has a good compatibility. In fact, when the relationship between the repulsion distance and the time was examined for the rubber-based foam according to Example 1 and the conventional rubber-based foam, the results shown in FIG. 1 were obtained. From FIG. 1, it is clear that the rubber foam according to the present invention has a smaller impact resilience than that of the conventional foam.
【００１４】（実施例２） ＳＩＳブロックポリマー（商品名：ＶＳ−１、クラレ社製） ６０重量％ １、２ポリブタジエンゴム（商品名：ＲＢ８２０、日本合成ゴム株式会社製） ４０重量％ ステアリン酸 １重量％ ＤＯＰ ５重量％ 炭酸カルシウム ８０重量％ 亜鉛華 ３重量％ アゾジカーボンアミド ５重量％ 加硫促進剤 ０．５重量％ 硫黄 １．０重量％ この実施例２では、実施例１と同様に混練りし、加熱加
圧して発泡させたところ、密度０．３ｇ／cm3 ，硬さ３
５（ｃ−タイプ），反発弾性６の発泡体が得られた。(Example 2) SIS block polymer (trade name: VS-1, manufactured by Kuraray Co., Ltd.) 60% by weight 1, 2 polybutadiene rubber (trade name: RB820, manufactured by Japan Synthetic Rubber Co., Ltd.) 40% by weight stearic acid 1 % By weight DOP 5% by weight Calcium carbonate 80% by weight Zinc white 3% by weight Azodicarbonamide 5% by weight Vulcanization accelerator 0.5% by weight Sulfur 1.0% by weight In this Example 2, as in Example 1. When kneaded, heated and pressed to foam, density 0.3 g / cm 3 , hardness 3
A foam of 5 (c-type) and impact resilience 6 was obtained.
【００１５】（実施例３） ＳＩＳブロックポリマー（商品名：ＶＳ−１、クラレ社製） ７０重量％ エチレン−酢酸ビニル共重合体樹脂 ３０重量％ ステアリン酸亜鉛 ３重量％ アゾジカーボンアミド ７重量％ 過酸化物（商品名：パーカドックス14／40） ０．５重量％ この実施例３では、実施例１と同様に混練りしてシート
状にし、１６５℃にて２０分加熱加圧した後、発泡させ
た。得られた発泡体は、密度０．０７ｇ／cm3，硬さ10
（ｃ−タイプ），反発弾性３の衝撃吸収性に富む発泡体
であった。(Example 3) SIS block polymer (trade name: VS-1, manufactured by Kuraray Co., Ltd.) 70% by weight Ethylene-vinyl acetate copolymer resin 30% by weight Zinc stearate 3% by weight Azodicarbonamide 7% by weight Peroxide (Brand name: Perkadox 14/40) 0.5% by weight In this Example 3, the same kneading as in Example 1 was performed to form a sheet, and after heating and pressing at 165 ° C. for 20 minutes, Foamed. The obtained foam has a density of 0.07 g / cm 3 and a hardness of 10
(C-type), a foam having a high impact resilience of impact resilience 3.
【００１６】[0016]
【発明の効果】以上詳述したようにこの発明のゴム系発
泡体の製造方法によれば、制振性能に優れるとともに、
復元速度が遅くて衝撃吸収性に優れ、かつ熱可塑性樹脂
と相溶性が良く、衝撃吸収材、車の真中の制振材、マッ
トの下敷、ヘルメットやグローブ内貼りの衝撃材等に有
用である。As described in detail above, according to the method for producing a rubber-based foam of the present invention, the vibration damping performance is excellent and
It has a slow recovery speed, excellent shock absorption, and good compatibility with thermoplastic resin, and is useful as a shock absorbing material, a vibration damping material in the middle of a car, a mat underlay, a shock material attached to a helmet or gloves. .
【図１】この発明に係るゴム系発泡体と従来に係るゴム
系発泡体における反発距離と時間との関係を示す特性
図。FIG. 1 is a characteristic diagram showing a relationship between a repulsion distance and time in a rubber-based foam according to the present invention and a conventional rubber-based foam.
Claims (1)
有するスチレン・イソプレン・スチレン構造のブロック
ポリマーを５０％以上含むゴム又はゴムとプラスチック
の混合物を主原料とし、これに加硫剤，発泡剤，促進
剤，軟化剤あるいは更に滑剤，充填剤，顔料，老化防止
剤を添加、混練り、シート状とした後、金型に入れてプ
レス機により加熱加圧し、プレスを開放して得られるこ
とを特徴とするゴム系発泡体の製造方法。1. A rubber or a mixture of a rubber and a plastic containing 50% or more of a styrene / isoprene / styrene structure block polymer having a vinyl-structured polyisoprene block is used as a main raw material, and a vulcanizing agent, a foaming agent or an accelerator is added to the main material. , A softening agent or a lubricant, a filler, a pigment, an antiaging agent are added, kneaded and formed into a sheet, which is then placed in a mold, heated and pressed by a press machine, and obtained by opening the press. A method for producing a rubber foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21616993A JPH0762130A (en) | 1993-08-31 | 1993-08-31 | Production of rubber foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21616993A JPH0762130A (en) | 1993-08-31 | 1993-08-31 | Production of rubber foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0762130A true JPH0762130A (en) | 1995-03-07 |
Family
ID=16684371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21616993A Pending JPH0762130A (en) | 1993-08-31 | 1993-08-31 | Production of rubber foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0762130A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002020657A1 (en) * | 2000-09-05 | 2002-03-14 | Api Applicazioni Plastiche Industriali Spa | Compounds for manufacturing cross-linked products with great softness and high thermal dimensional stability |
| WO2002020658A1 (en) * | 2000-09-05 | 2002-03-14 | Api Applicazioni Plastiche Industriali S.P.A. | Compounds for manufacturing cross-linked products with a matt surface appearance, great softness and high thermal dimensional stability |
| US6458863B1 (en) | 1999-12-09 | 2002-10-01 | Sanwa Kako Company Limited | Vibration damping, resinous, open cell cellular bodies |
| WO2004016679A3 (en) * | 2002-08-15 | 2004-04-08 | Advanced Elastomer Systems | Process for preparing foamed thermoplastic vulcanisates |
| CN104262730A (en) * | 2014-08-29 | 2015-01-07 | 广东志达行新材料有限公司 | Preparation method of TCR thermal controllable macromolecule elastic composite rubber material |
| CN104262731A (en) * | 2014-08-29 | 2015-01-07 | 广东志达行新材料有限公司 | TCR thermo-controllable macromolecular elastic compounded rubber material |
| CN108192514A (en) * | 2017-12-28 | 2018-06-22 | 东辰控股集团有限公司 | A kind of thermoplastic elastomer (TPE) waterstop and preparation method thereof |
| CN111808337A (en) * | 2020-06-16 | 2020-10-23 | 普莱斯德集团股份有限公司 | Open-cell type rubber and plastic foaming filter cotton |
| CN113045850A (en) * | 2021-03-16 | 2021-06-29 | 福州友星生物科技有限公司 | Shock-absorbing slow-recovery-elasticity foam material and process thereof |
-
1993
- 1993-08-31 JP JP21616993A patent/JPH0762130A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6458863B1 (en) | 1999-12-09 | 2002-10-01 | Sanwa Kako Company Limited | Vibration damping, resinous, open cell cellular bodies |
| WO2002020657A1 (en) * | 2000-09-05 | 2002-03-14 | Api Applicazioni Plastiche Industriali Spa | Compounds for manufacturing cross-linked products with great softness and high thermal dimensional stability |
| WO2002020658A1 (en) * | 2000-09-05 | 2002-03-14 | Api Applicazioni Plastiche Industriali S.P.A. | Compounds for manufacturing cross-linked products with a matt surface appearance, great softness and high thermal dimensional stability |
| WO2004016679A3 (en) * | 2002-08-15 | 2004-04-08 | Advanced Elastomer Systems | Process for preparing foamed thermoplastic vulcanisates |
| WO2004016678A3 (en) * | 2002-08-15 | 2004-04-29 | Advanced Elastomer Systems | Process for preparing foamed thermoplastic vulcanisates |
| CN104262730A (en) * | 2014-08-29 | 2015-01-07 | 广东志达行新材料有限公司 | Preparation method of TCR thermal controllable macromolecule elastic composite rubber material |
| CN104262731A (en) * | 2014-08-29 | 2015-01-07 | 广东志达行新材料有限公司 | TCR thermo-controllable macromolecular elastic compounded rubber material |
| CN108192514A (en) * | 2017-12-28 | 2018-06-22 | 东辰控股集团有限公司 | A kind of thermoplastic elastomer (TPE) waterstop and preparation method thereof |
| CN111808337A (en) * | 2020-06-16 | 2020-10-23 | 普莱斯德集团股份有限公司 | Open-cell type rubber and plastic foaming filter cotton |
| CN113045850A (en) * | 2021-03-16 | 2021-06-29 | 福州友星生物科技有限公司 | Shock-absorbing slow-recovery-elasticity foam material and process thereof |
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