JPS59215329A - Crosslinked synthetic resin foam - Google Patents
Crosslinked synthetic resin foamInfo
- Publication number
- JPS59215329A JPS59215329A JP8947383A JP8947383A JPS59215329A JP S59215329 A JPS59215329 A JP S59215329A JP 8947383 A JP8947383 A JP 8947383A JP 8947383 A JP8947383 A JP 8947383A JP S59215329 A JPS59215329 A JP S59215329A
- Authority
- JP
- Japan
- Prior art keywords
- foam
- weight
- synthetic resin
- olefin
- crosslinked
- 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
Abstract
Description
【発明の詳細な説明】 本蕎明は合成樹脂架橋発泡体に関する。[Detailed description of the invention] The present invention relates to a synthetic resin crosslinked foam.
従来、ポリエチレンの架橋発泡体が、ソノクッション性
、断熱性等が優れていることから、自動車天井材等の自
動車内装材、粘着テープ基材、折版屋根用断熱材等とし
て広く使用されている。しかしながら、上記ポリエチレ
ンの架橋発泡体は、軟質塩化ビニルレザーの如き表皮材
と貼合せ、自動車内装材として用いる場合等にはその表
面の接着性が悪く、表皮材が剥離してしまう欠点があっ
た。また、ドア内面材、クーラーカバー等、発泡シート
を真空成形等の熱成形によって深絞り成形して製品化す
るものについては、従来のポリエチレン架橋発泡体では
伸度が十分でなく、使用に耐え得る成形体を作製するこ
とができなかった。また、耐熱性、剛性等を要求される
用途についてはポリエチレン架橋発泡体では十分対処で
きない場合があった。これらの熱成形性、耐熱性、剛性
等を満足するものとしてポリゾロピレンの架橋発泡体が
考えられるが、ポリゾロピレンの架橋発泡体は、ポリプ
ロピレン樹脂が高融点であり、樹脂の溶融温度と発泡剤
やラジカル発生剤の分解温度が接近しているため、発泡
性シートの成形時に発泡剤やラジカル発生剤の熱分解が
おこり、架橋が均一で気泡の均一な発泡体の製造が困難
であった。Conventionally, cross-linked polyethylene foams have been widely used as automobile interior materials such as automobile ceiling materials, adhesive tape base materials, and insulation materials for folded roofs due to their excellent sono-cushioning properties and insulation properties. . However, when the above-mentioned cross-linked polyethylene foam is laminated with a skin material such as soft vinyl chloride leather or used as an automobile interior material, its surface has poor adhesion and the skin material may peel off. . In addition, for products such as door interior materials and cooler covers that are produced by deep drawing foam sheets by thermoforming such as vacuum forming, conventional cross-linked polyethylene foam does not have sufficient elongation and cannot withstand use. It was not possible to produce a molded object. Further, for applications requiring heat resistance, rigidity, etc., polyethylene crosslinked foams may not be able to adequately meet the requirements. A crosslinked foam of polyzolopylene is considered to satisfy these thermoformability, heat resistance, rigidity, etc., but the crosslinked foam of polyzolopylene has a high melting point of the polypropylene resin, and the melting temperature of the resin and the blowing agent and radicals are different. Since the decomposition temperatures of the generator are close to each other, thermal decomposition of the foaming agent and radical generator occurs during molding of the foamable sheet, making it difficult to produce a foam with uniform crosslinking and uniform cells.
本発明は、上述の従来の発泡体の欠点を解消し、接着性
、成形性、耐熱性、剛性等の物性が優れ、伺且つ製造も
容易な合成樹脂架橋発泡体を提供することを目的とする
。The purpose of the present invention is to eliminate the drawbacks of the conventional foams described above, and to provide a crosslinked synthetic resin foam that has excellent physical properties such as adhesion, moldability, heat resistance, and rigidity, and is easy to construct and manufacture. do.
すなわち、本発明の要旨は、炭素数が４〜１゜のα−オ
レフィン成分か１〜１５重量％、アイソタクチック度が
４０チ以上であるグロビレンーα−オレフィン共重合体
が構成成分として用いられていることを特徴とする合成
樹脂架橋発泡体に存する。That is, the gist of the present invention is that a globylene-α-olefin copolymer having 1 to 15% by weight of an α-olefin component having a carbon number of 4 to 1° and an isotactic degree of 40 degrees or more is used as a constituent component. A synthetic resin crosslinked foam characterized by:
本発明に用いられるグロピレンーα−オレフィ／共重合
体は、炭素数が４〜１ｏのα−オレフィンの含有率が１
〜１５重量％、好ましくは２〜１０重量％、アイソタク
チック度が４０％以上、好ましくは５０％以上のもので
ある。上記α−オレフィンは２種以上共重合されてもよ
い。プロピレンに上記範囲でα−オレフィンが共重合さ
れていると、従来のポリゾロピレン樹脂に比べてＬａ・
が低くなり、樹脂と発泡剤や架橋促進剤、有機過酸化物
を溶融混合したり、成形したりする場合：（、発泡剤や
有機過酸化物の熱分解をおこすことなく作業できる。ま
た、α−オレフィンのため共重合体の側鎖の反応性が犬
きく、発泡体の表面の接着性が良いのである。α−オレ
フィン成分が多くなりすぎると、ゴム状になり機械的物
性の優れた発泡体は得られない。炭素数が４より小さい
オレフィン、すなわちエチレンとプロピレン共重合体の
場合は、上記のような接着性が発揮されないのである。The glopyrene-α-olefin/copolymer used in the present invention has an α-olefin content of 4 to 1 o carbon atoms at a content of 1
~15% by weight, preferably 2~10% by weight, and an isotactic degree of 40% or more, preferably 50% or more. Two or more kinds of the above α-olefins may be copolymerized. When α-olefin is copolymerized with propylene in the above range, compared to conventional polyzolopylene resin, La.
When melt-mixing or molding resin, blowing agent, crosslinking accelerator, or organic peroxide, the process can be performed without causing thermal decomposition of the blowing agent or organic peroxide. Because of the α-olefin, the reactivity of the side chains of the copolymer is high, and the surface adhesion of the foam is good.If the α-olefin component is too large, it becomes rubbery and has excellent mechanical properties. A foam cannot be obtained.Olefins having less than 4 carbon atoms, ie, ethylene and propylene copolymers, do not exhibit the adhesive properties described above.
また、グロビレンーα−メレフィン共重合体は、α−オ
レフィンが共重合されているだめ、衝撃強度が大きく、
更にエチレンークロピレン共重合体に比べ引張り強度、
曲げ剛性等の機械的物性が優れているのである。まだ、
アイソタクチック度が低くなると機械的物性が低下する
ので好ましくない。In addition, the globylene-α-molefin copolymer has high impact strength because α-olefin is copolymerized.
Furthermore, the tensile strength is higher than that of ethylene-chloropyrene copolymer.
It has excellent mechanical properties such as bending rigidity. still,
If the degree of isotacticity becomes low, mechanical properties deteriorate, which is not preferable.
本発明に用いられるゾロピレン−α−オレフィン共重合
体の製造方法については特に規定されるものではなく、
一般的には重合槽に触媒及び・α−オレフィンとプロピ
レンを一定の比率で供給して重合させる方法が用いられ
る。The method for producing the zolopyrene-α-olefin copolymer used in the present invention is not particularly specified;
Generally, a method is used in which a catalyst, .alpha.-olefin and propylene are supplied to a polymerization tank at a fixed ratio for polymerization.
本発明の合成樹脂架橋発泡体を製造する方法としては、
公知のポリオレフィン類の架橋発泡体の製造方法が用い
得る。特に好ましい製造方法としては、樹脂、発泡剤、
架橋促進剤からなる混合物を溶融成形し、これに電離性
放射線を照射して架橋し、しかるのちに発泡剤の分解温
度以上に加熱して発泡させる方法、あるいは樹脂、発泡
剤、架橋剤、架橋促進剤からなる混合物を溶融成形し、
これを架橋剤及び発泡剤の分解温度以上に加熱して架橋
と発泡を行なわせる方法などが挙げられる。The method for producing the synthetic resin crosslinked foam of the present invention includes:
Known methods for producing crosslinked foams of polyolefins can be used. A particularly preferred manufacturing method includes resin, foaming agent,
A method of melt-molding a mixture consisting of a crosslinking accelerator, crosslinking it by irradiating it with ionizing radiation, and then foaming it by heating it to a temperature higher than the decomposition temperature of the blowing agent; melt-forming a mixture of accelerators;
Examples include a method of heating this above the decomposition temperature of the crosslinking agent and foaming agent to effect crosslinking and foaming.
これらの方法は連続した長尺発泡体を製造する場合に好
適である。These methods are suitable for producing continuous elongated foams.
本発明の合成樹脂架橋発泡体を製造する場合には、プロ
ぎレンーα−オＶフィン共重合体の融点が従来のポリプ
ロピレンより低いので製造が容易である。ＤＴＡ （示
差熱分析］またはＤＳＣ（差動熱量計）で測定した融点
のビーブが、ポリプロピレンでは１６８〜１７０ｔｌ：
’であるのに対し、本発明のグロビレンーα−オレフィ
ン共重合体では１２０〜１６５Ｃの範囲が可能で好適に
使用でき、特に１３０〜１６０Ｃの範囲が好ましい。本
発明のグロビレンーα−オレフィン共重合体の好ましい
メルトインデックス（２３０Ｃ，９７１０分、ＡＳＴＭ
Ｄ １２３８）としては０．１〜５０、特に好まし
くは０．３〜３０の範囲である。When producing the synthetic resin crosslinked foam of the present invention, production is easy because the melting point of the progylene-α-O V-fin copolymer is lower than that of conventional polypropylene. The melting point beeb measured by DTA (differential thermal analysis) or DSC (differential calorimeter) is 168 to 170 tl for polypropylene:
' On the other hand, in the globylene-α-olefin copolymer of the present invention, a range of 120 to 165C is possible and can be suitably used, and a range of 130 to 160C is particularly preferred. Preferred melt index of the globylene-α-olefin copolymer of the present invention (230C, 9710 minutes, ASTM
D1238) is in the range of 0.1 to 50, particularly preferably 0.3 to 30.
本発明の合成樹脂架橋発泡体を製造するにあたっては、
改質を目的としてプロピレン−α−オレフィン共重合体
以外の樹脂を混合することができる。混合割合としては
プロピレン−α−オレフィン共重合体が混合物の２０重
量係以上あればよく、好ましくは４０重量％以上であり
、混合される樹脂としては、低密度ポリエチレン、高密
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−プロピレン共重合体、
クロピレン−エチレン−α−オレフづン共重合体、エチ
Ｖンーアクリル酸エチル共重合体、ポリプロピレン、ポ
リブタノエン、塩素化ポリエチレン、塩素化ポリノロピ
レンなどが埜げられる。In producing the synthetic resin crosslinked foam of the present invention,
For the purpose of modification, resins other than the propylene-α-olefin copolymer can be mixed. The proportion of the propylene-α-olefin copolymer in the mixture should be at least 20% by weight, preferably at least 40% by weight, and the resins to be mixed include low density polyethylene, high density polyethylene, and linear low density polyethylene. Density polyethylene, ethylene
Vinyl acetate copolymer, ethylene-propylene copolymer,
Examples include clopylene-ethylene-α-olefin copolymer, ethyl V-ethyl acrylate copolymer, polypropylene, polybutanoene, chlorinated polyethylene, chlorinated polynolopylene, and the like.
また、樹脂中に架橋や発泡などの妨害ケこならないかぎ
り、重合性モノマー、熱安定剤、抗酸化剤、増量剤、可
塑剤、耐炎剤、着色剤、帯電防止剤などの有機物や無機
物を加えることができる。In addition, organic and inorganic substances such as polymerizable monomers, heat stabilizers, antioxidants, extenders, plasticizers, flame retardants, colorants, and antistatic agents may be added to the resin unless they interfere with crosslinking or foaming. be able to.
発泡剤としては、樹脂の溶融点以上に加熱されたときに
分解または気化する化合物が使用でき、分解温度が１８
０〜２７０Ｃの範囲のものが好ましく、例えばアゾジカ
ルボンアミド、ジニトロソペンタメチレンテトラミン、
ヒドラゾジカルデンアミドなどがある。発泡剤は樹脂混
合物に対して０．１〜４０重量％の範囲で使用され、そ
れぞれの種類や発泡倍率によって適宜に混合量を変える
ことができる。As the blowing agent, a compound that decomposes or vaporizes when heated above the melting point of the resin can be used, and the decomposition temperature is 18
Those in the range of 0 to 270C are preferred, such as azodicarbonamide, dinitrosopentamethylenetetramine,
Examples include hydrazodicardenamide. The foaming agent is used in a range of 0.1 to 40% by weight based on the resin mixture, and the mixing amount can be changed as appropriate depending on the type and expansion ratio.
架橋剤に有機過酸化物を用いる場合は、メチルエチルケ
トンパーオキサイド、ツクミルパーオキサイドなどが使
用され、樹脂混合物に対して０．０１〜１０重量％、好
ましくは０．０５〜５重量％使用される。架橋に電離性
放射線を用いる場合は、電子線、α線、β線、ｒ、ｖＩ
Ｉなどが使用され、放射線の照射量としては一般に０，
１〜３０ Ｍｒａｄｘ好捷しくは０．５〜２０ Ｍｒａ
ｄである。When an organic peroxide is used as a crosslinking agent, methyl ethyl ketone peroxide, tsucumyl peroxide, etc. are used, and the amount thereof is 0.01 to 10% by weight, preferably 0.05 to 5% by weight, based on the resin mixture. When using ionizing radiation for crosslinking, electron beam, α ray, β ray, r, vI
I, etc. are used, and the radiation dose is generally 0,
1 to 30 Mradx preferably 0.5 to 20 Mra
It is d.
架橋反応をスムーズに効率よく行なうためには、架橋促
進剤を用いるのが好ましく、例えばジビニルベンゼン、
トリメチロールプロパントリアクリレート、トリメチロ
ールゾロノぞントリメタクリレートなどの多官能性化合
物が使用され、樹脂混合物に対して０．１〜ｌＯ重量％
、好ましくは０．５〜３重量％使用される。In order to carry out the crosslinking reaction smoothly and efficiently, it is preferable to use a crosslinking accelerator, such as divinylbenzene,
Polyfunctional compounds such as trimethylolpropane triacrylate, trimethylolzolonozone trimethacrylate are used, and amounts of 0.1 to 10% by weight based on the resin mixture are used.
, preferably 0.5 to 3% by weight.
架橋する場合の架橋度は一般に５〜９０チ好ましくは２
０〜８０チであればよい。架橋度が低すぎると、伸度は
大きいが均一微細な気泡を有する発泡体が得られず、高
すぎると、樹脂の溶融粘度が高すぎて高発泡倍率の良好
な発泡体は得にくく、また発泡体を加熱した際の伸度が
低く真空成形等の熱成形性が困難になる。但し、架橋度
とは試料をキシレン中に１２０Ｃで２４時間浸漬したと
きの不溶部の重量係をいう。When crosslinking, the degree of crosslinking is generally 5 to 90 inches, preferably 2
It is sufficient if it is between 0 and 80 inches. If the degree of crosslinking is too low, a foam with high elongation but uniform fine cells cannot be obtained; if it is too high, the melt viscosity of the resin is too high, making it difficult to obtain a foam with a high expansion ratio. When the foam is heated, its elongation is low, making thermoformability such as vacuum forming difficult. However, the degree of crosslinking refers to the weight of the insoluble portion when a sample is immersed in xylene at 120C for 24 hours.
樹脂混合物の溶融成形は押出成形機等を用いればよく、
発泡時の加熱は、熱風、赤外線、ソルトパス、オイルバ
ス等を用いればよい。また前述の押出成形機内で加熱す
ることも可能である。The resin mixture may be melt-molded using an extrusion molding machine, etc.
For heating during foaming, hot air, infrared rays, a salt path, an oil bath, etc. may be used. It is also possible to heat in the extrusion molding machine described above.
本発明の合成樹脂架橋発泡体の発泡倍率として □
は、通常４〜６０倍であるが、真空成形に用いるものは
１０〜４０倍のものが好ましい。As the expansion ratio of the synthetic resin crosslinked foam of the present invention □
is usually 4 to 60 times larger, but preferably 10 to 40 times larger for use in vacuum forming.
本発明の合成樹脂架橋発泡体は上述の如く構成されてい
るから、プロピレン−α−オレフィン共重合体のために
、接着性、熱成形性、耐熱性、剛性等の物性が優れたも
のとなり、且つゾロピレン−α−オレフィン共重合体の
溶融温度がポリプロピレンより低いから、気泡の均一微
細な高発泡倍率のものの製造が容易である。したがって
、本発明の合成樹脂架橋発泡体は、接着性、熱成形性、
耐熱性等を必要とする自動車内装材、ドア内面材、クー
ラーカバー、粘着テープ基材、折版屋根用断熱材等とし
て好適に使用できるのである。Since the synthetic resin crosslinked foam of the present invention is constructed as described above, it has excellent physical properties such as adhesiveness, thermoformability, heat resistance, and rigidity due to the propylene-α-olefin copolymer. Moreover, since the melting temperature of the zolopylene-α-olefin copolymer is lower than that of polypropylene, it is easy to produce a product with uniform, fine cells and a high expansion ratio. Therefore, the synthetic resin crosslinked foam of the present invention has adhesive properties, thermoformability,
It can be suitably used as automobile interior materials, door inner surface materials, cooler covers, adhesive tape base materials, insulation materials for folded roofs, etc. that require heat resistance.
以下本発明の合成樹脂架橋発泡体を実施例により説明す
る。EXAMPLES The synthetic resin crosslinked foam of the present invention will be explained below with reference to Examples.
実施例１
１−ブテン成分が４重量％、アイソタクチック度が９０
９１＋、融点が１５５Ｃ，メルトインデックスが６．０
の結晶性ゾロピレン−１−ブテン共重合体の粉末１００
重量部と、アゾジカルボンアミド１７重量部と、トリメ
チロールグロノ七ントリメタクリレート３重量部と、熱
安定剤１重量部とを、ミキサーで混合し、この混合物を
１２０膿φ押出機で、樹脂温度１７０Ｃで、幅４５０箇
、厚み１、５ ｔｅａのシートに押出成形した。このシ
ートは発泡剤が均一に分散され、発泡剤の分解のない滑
らかなものであった。次にこのシートに電子線加速機で
５． ＯＭｒａｄ づつ両面照射した後、炉内温度２６
０Ｃの熱風式発ｆｆ１機で発泡して発泡シートを得た。Example 1 1-butene component is 4% by weight, isotactic degree is 90
91+, melting point 155C, melt index 6.0
crystalline zolopyrene-1-butene copolymer powder 100
parts by weight, 17 parts by weight of azodicarbonamide, 3 parts by weight of trimethylolgulononeptane trimethacrylate, and 1 part by weight of a heat stabilizer. It was extruded at 170C into a sheet with a width of 450 pieces and a thickness of 1.5 tea. The foaming agent was uniformly dispersed in this sheet, and the sheet was smooth with no decomposition of the foaming agent. Next, 5. After irradiating both sides with OMrad, the temperature inside the furnace was 26
A foamed sheet was obtained by foaming with a hot air blower at 0C.
得られた発泡シートは均一微細な気泡を有し、白色で、
厚み４．２ ｔａｙｎ 、見かけ密度０．０２４ｔ ／
ｃｍ３、架橋度５３チであった。The obtained foam sheet has uniform fine bubbles and is white in color.
Thickness 4.2 tayn, apparent density 0.024t/
cm3, and the degree of crosslinking was 53 cm.
比較例１
アイソタクチック度が９７チ、メルトインデックスが８
，０のホモポリゾロピレン樹脂粉末１００重量部と、ア
ゾジカルボンアミド１７重量部と、トリメチロールプロ
パントリメタクリレート３重量部と、熱安定剤１重量部
とをミキサーで混合し、実施例１と同じように１２０−
φ押出機で押出成形した。しかし、樹脂温度は１９４Ｃ
より下げることができず、押出機内で発泡剤が分解し、
且つ、押出機内で樹脂の架橋が起こり、良好なシートは
得られなかった。Comparative Example 1 Isotactic degree is 97 degrees, melt index is 8
, 0 homopolyzolopyrene resin powder, 17 parts by weight of azodicarbonamide, 3 parts by weight of trimethylolpropane trimethacrylate, and 1 part by weight of a heat stabilizer were mixed in a mixer, and the same as in Example 1 was prepared. 120-
It was extruded using a φ extruder. However, the resin temperature is 194C
The foaming agent decomposes in the extruder, and
Moreover, crosslinking of the resin occurred within the extruder, and a good sheet could not be obtained.
比較例２
エチレン成分が４重量係、アイソタクチック度が７５％
、融点が１４５ｔｌｌ’、メルトインデックスが８．０
の結晶性プロピレン−エチレンランダム共重合体粉末１
ｏｏ重量部と、アゾジカルボンアミド１３重量部と、ト
リメチロールプロパントリメタクリレート３重量部と、
熱安定剤１重量部とを、ミキサーで混合し、この混合物
を１２０＋ｍφ押出機で、樹脂温度１７０ｔ：’で、幅
４５０ｍ、厚み１、５ ａｒｍ、ノ’／−トに押出成形
した。次にこのシートに電子線加速機で５． ＯＭｒａ
ｄ づつ両面照射した後、炉内温度２６０ｃの発泡機で
発泡して発泡シートを得た。得られた発泡シートは厚み
４．２鰭、見かけ密度０．０４３ ？ ／ ｃｍ” 、
架橋度５２チであった。Comparative Example 2 Ethylene component: 4% by weight, isotactic degree: 75%
, melting point is 145tll', melt index is 8.0
Crystalline propylene-ethylene random copolymer powder 1
oo parts by weight, 13 parts by weight of azodicarbonamide, 3 parts by weight of trimethylolpropane trimethacrylate,
1 part by weight of a heat stabilizer was mixed in a mixer, and this mixture was extruded into a notebook having a width of 450 m and a thickness of 1.5 arms using a 120+ mφ extruder at a resin temperature of 170 t:'. Next, 5. OMra
After irradiating both sides at a time, foaming was performed using a foaming machine with a furnace temperature of 260°C to obtain a foamed sheet. The resulting foam sheet had a thickness of 4.2 fins and an apparent density of 0.043? /cm”,
The degree of crosslinking was 52 degrees.
実施例１と比較例２０発泡シートの機械的物性を測定し
たところ第１表のとおりであった。また、それぞれの発
泡シートに、固形分３０％のポリエステル系接着剤と、
インシアネートとを１００対５の割合で混合したものを
、２５ｆ／ｌｎ２ の割合で塗布し、次いで１２０Ｃ
のオーブンで５分間乾燥させた後、厚み０．３５ ｒｔ
ｒｍの軟質塩化ビニル樹脂シートを６０Ｃの加熱板で押
えて貼り付けた。そして、これらの積層シートの接着性
を、発泡シートと軟質塩化ビニル樹脂シートとを剥して
調べた。The mechanical properties of the foamed sheets of Example 1 and Comparative Example 20 were measured and were as shown in Table 1. In addition, each foam sheet is coated with a polyester adhesive with a solid content of 30%,
A mixture of 100:5 with incyanate was applied at a ratio of 25f/ln2, and then 120C
After drying in the oven for 5 minutes, the thickness is 0.35 rt.
rm soft vinyl chloride resin sheet was pressed and pasted with a 60C heating plate. Then, the adhesive properties of these laminated sheets were examined by peeling off the foam sheet and the soft vinyl chloride resin sheet.
積層シートが強固に接着していれば、発泡シート表面が
破壊されるので、発泡シートの破壊面の割合で接着性を
表わし、同じく第１表に示した。If the laminated sheet is strongly adhered, the surface of the foam sheet will be destroyed, so the adhesion is expressed as the percentage of the destroyed surface of the foam sheet, which is also shown in Table 1.
第１表
伺、物性値は発泡シートのタテ方向、ヨコ方向 １
の平均値を用いた。First table, physical property values are in the vertical and horizontal directions of the foam sheet 1
The average value was used.
第１表から本発明の発泡体の機械的物性が優れ、且つ接
着性も優れていることがわかる。Table 1 shows that the foam of the present invention has excellent mechanical properties and adhesive properties.
実施例２
実施例１で用いたと同じプロピレン−１−ブテン共重合
体５０重量部と、メルトインデックスが６．０、密度が
０．９５６の高密度ポリエチレンの粉、 末５０重量
部と、アゾジカルボンアミド１３重量部と、トリメチロ
ールゾロパントリメタクリレート２重量部と、熱安定剤
１重量部とを、ミキサーで混合し、この混合物を１２０
ｍｍφ押出機で、樹脂温度１７０Ｃで幅４５０ＩＩＩＩ
１１．厚み１．３ ｔａｂのシートに押出成形した。こ
のシートは発泡剤が均一に分散され、発泡剤の分解のな
い滑らかなものであった。次にこのシートに電子線加速
機で１．３ Ｍｒａｄづつ両面照射した後、炉内温度２
６０Ｃの熱風式発泡機で発泡して発泡シートを得た。得
られた発泡シートは均一微細な気？Ｌを有し、白色で、
厚み３．２−１見かけ密度０．０３２ ｆ ／ ｃｍ３
、架橋度４３悌であった。Example 2 50 parts by weight of the same propylene-1-butene copolymer used in Example 1, 50 parts by weight of high-density polyethylene powder with a melt index of 6.0 and a density of 0.956, and azodicarbonate. 13 parts by weight of amide, 2 parts by weight of trimethylolzolopane trimethacrylate, and 1 part by weight of heat stabilizer were mixed in a mixer, and this mixture was mixed with 120 parts by weight of amide.
With a mmφ extruder, the width is 450III at a resin temperature of 170C.
11. It was extruded into a sheet with a thickness of 1.3 tab. The foaming agent was uniformly dispersed in this sheet, and the sheet was smooth with no decomposition of the foaming agent. Next, after irradiating both sides of this sheet with an electron beam accelerator at 1.3 Mrad, the furnace temperature was lowered to 2.
A foamed sheet was obtained by foaming with a 60C hot air foaming machine. Does the obtained foam sheet have uniform fine air? has L, is white,
Thickness 3.2-1 Apparent density 0.032 f/cm3
, the degree of crosslinking was 43°.
比較例３
比較例２で用いたと同じプロピレン−エチレンランダム
共重合体５０重量部と、実施例２で用いたと同じ高密度
ポリエチレン５０重量部と、アゾジカルボンアミド１３
重量部と、トリメチロールグロノセントリメタクリレー
ト２重量部と、熱安定剤１重量部とを、ミキサーで混合
し、以下実施例２と同様にして発泡シートを得た。得ら
れた発泡シートは厚み３．１節、見かけｍ 瓜０．０３
３ ｔ ／ ｃｍ３であった。Comparative Example 3 50 parts by weight of the same propylene-ethylene random copolymer used in Comparative Example 2, 50 parts by weight of the same high-density polyethylene as used in Example 2, and 13 parts by weight of azodicarbonamide
parts by weight, 2 parts by weight of trimethylolgulonocentrimethacrylate, and 1 part by weight of a heat stabilizer were mixed in a mixer, and a foamed sheet was obtained in the same manner as in Example 2. The obtained foam sheet has a thickness of 3.1 sections and an apparent m of 0.03 mm.
It was 3t/cm3.
次に実施例２と比較例３０発発泡−ト機械的物性及び接
ｔａを前記と同様にして測定し７ｙ結果を第２表に示す
。Next, the mechanical properties and contact temperature of the foamed foams of Example 2 and Comparative Example 30 were measured in the same manner as described above, and the results are shown in Table 2.
第２表
第２表からも本発明の発泡体の機械的物性及び接着性が
優れていることがわかる。Table 2 also shows that the foam of the present invention has excellent mechanical properties and adhesive properties.
特許出願人 積水化学工業株式会社 代表者 藤 沼 基 利patent applicant Sekisui Chemical Co., Ltd. Representative: Mototoshi Fujinuma
Claims (1)
量％、アイソタクチック度が４０−以上でアルプロピレ
ン−α−オレフィン共重合体が構成成分として用いられ
ていることを特徴とする合成樹脂架橋発泡体。 ２α−オレフィンが１−ブテンである特許請求の範囲第
１項記載の合成樹脂架橋発泡体。[Claims] 1. The α-olefin component having 4 to 10 carbon atoms is 1 to 15% by weight, the isotactic degree is 40 or more, and an alpropylene-α-olefin copolymer is used as a constituent component. A synthetic resin crosslinked foam characterized by: The synthetic resin crosslinked foam according to claim 1, wherein the 2α-olefin is 1-butene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8947383A JPS59215329A (en) | 1983-05-20 | 1983-05-20 | Crosslinked synthetic resin foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8947383A JPS59215329A (en) | 1983-05-20 | 1983-05-20 | Crosslinked synthetic resin foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59215329A true JPS59215329A (en) | 1984-12-05 |
Family
ID=13971691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8947383A Pending JPS59215329A (en) | 1983-05-20 | 1983-05-20 | Crosslinked synthetic resin foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59215329A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065007A (en) * | 1983-09-21 | 1985-04-13 | Chisso Corp | Crosslinkable/expandable propylene/butene copolymer |
| JPH04249547A (en) * | 1991-01-07 | 1992-09-04 | Sekisui Chem Co Ltd | Crosslinked olefin resin foam |
| JP2017503889A (en) * | 2013-12-30 | 2017-02-02 | トーレ プラスティックス （アメリカ） インコーポレイテッド | Method for producing irradiated crosslinked polypropylene foam |
| US10150273B2 (en) | 2014-12-30 | 2018-12-11 | Toray Plastics (America), Inc. | Coextruded, crosslinked multilayer polyolefin foam structures from recycled metallized polyolefin material and methods of making the same |
| US10384388B2 (en) | 2014-12-30 | 2019-08-20 | Toray Plastics (America), Inc. | Coextruded, crosslinked multilayer polyolefin foam structures and methods of making the same |
| WO2019189836A1 (en) * | 2018-03-30 | 2019-10-03 | 積水化学工業株式会社 | Polyolefin resin foam, method for producing polyolefin resin foam, and molded body |
| US10501598B2 (en) | 2017-06-29 | 2019-12-10 | Toray Plastics (America), Inc. | Method of making coextruded, crosslinked multilayer polyolefin foam structures from recycled crosslinked polyolefin foam material |
| US10814590B2 (en) | 2013-12-31 | 2020-10-27 | Toray Plastics (America), Inc. | Methods of producing foam structures from recycled metallized polyolefin material |
| US11007761B2 (en) | 2017-03-31 | 2021-05-18 | Toray Plastics (America), Inc. | Method of making coextruded, cross-linked polyolefin foam with TPU cap layers |
| US11590677B2 (en) | 2019-03-29 | 2023-02-28 | Toray Plastics (America), Inc. | Method of making coextruded, crosslinked polyolefin foam with KEE cap layers |
| US11590730B2 (en) | 2019-03-29 | 2023-02-28 | Toray Plastics (America), Inc. | Coextruded, crosslinked polyolefin foam with KEE cap layers |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134130A (en) * | 1982-02-03 | 1983-08-10 | Hitachi Chem Co Ltd | Preparation of polyolefin foam |
-
1983
- 1983-05-20 JP JP8947383A patent/JPS59215329A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134130A (en) * | 1982-02-03 | 1983-08-10 | Hitachi Chem Co Ltd | Preparation of polyolefin foam |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065007A (en) * | 1983-09-21 | 1985-04-13 | Chisso Corp | Crosslinkable/expandable propylene/butene copolymer |
| JPH04249547A (en) * | 1991-01-07 | 1992-09-04 | Sekisui Chem Co Ltd | Crosslinked olefin resin foam |
| JP2017503889A (en) * | 2013-12-30 | 2017-02-02 | トーレ プラスティックス （アメリカ） インコーポレイテッド | Method for producing irradiated crosslinked polypropylene foam |
| US10137624B2 (en) | 2013-12-30 | 2018-11-27 | Toray Plastics (America), Inc. | Method to direct compound extruded structure for the production of irradiation crosslinked polypropylene foam |
| US10814590B2 (en) | 2013-12-31 | 2020-10-27 | Toray Plastics (America), Inc. | Methods of producing foam structures from recycled metallized polyolefin material |
| US10384388B2 (en) | 2014-12-30 | 2019-08-20 | Toray Plastics (America), Inc. | Coextruded, crosslinked multilayer polyolefin foam structures and methods of making the same |
| US10150273B2 (en) | 2014-12-30 | 2018-12-11 | Toray Plastics (America), Inc. | Coextruded, crosslinked multilayer polyolefin foam structures from recycled metallized polyolefin material and methods of making the same |
| US11007761B2 (en) | 2017-03-31 | 2021-05-18 | Toray Plastics (America), Inc. | Method of making coextruded, cross-linked polyolefin foam with TPU cap layers |
| US11628657B2 (en) | 2017-03-31 | 2023-04-18 | Toray Plastics (America), Inc. | Method of making coextruded, cross-linked polyolefin foam with TPU cap layers |
| US10501598B2 (en) | 2017-06-29 | 2019-12-10 | Toray Plastics (America), Inc. | Method of making coextruded, crosslinked multilayer polyolefin foam structures from recycled crosslinked polyolefin foam material |
| WO2019189836A1 (en) * | 2018-03-30 | 2019-10-03 | 積水化学工業株式会社 | Polyolefin resin foam, method for producing polyolefin resin foam, and molded body |
| JP6591725B1 (en) * | 2018-03-30 | 2019-10-16 | 積水化学工業株式会社 | Polyolefin resin foam, method for producing polyolefin resin foam, and molded article |
| US11590677B2 (en) | 2019-03-29 | 2023-02-28 | Toray Plastics (America), Inc. | Method of making coextruded, crosslinked polyolefin foam with KEE cap layers |
| US11590730B2 (en) | 2019-03-29 | 2023-02-28 | Toray Plastics (America), Inc. | Coextruded, crosslinked polyolefin foam with KEE cap layers |
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