JPH09151267A - Polypropylene resin composition and its foam - Google Patents
Polypropylene resin composition and its foamInfo
- Publication number
- JPH09151267A JPH09151267A JP31132895A JP31132895A JPH09151267A JP H09151267 A JPH09151267 A JP H09151267A JP 31132895 A JP31132895 A JP 31132895A JP 31132895 A JP31132895 A JP 31132895A JP H09151267 A JPH09151267 A JP H09151267A
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- Prior art keywords
- viscosity
- polypropylene resin
- elongation
- resin
- resin composition
- Prior art date
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Abstract
Description
【発明の属する技術分野】本発明は、ポリプロピレン系
樹脂組成物及びその発泡体に関するものである。TECHNICAL FIELD The present invention relates to a polypropylene resin composition and a foam thereof.
【０００１】[0001]
【従来の技術】従来より、ポリプロピレン系樹脂発泡体
は、柔軟性・断熱性に優れており、緩衝材や断熱材とし
て広く使用されてきた。ポリプロピレン系樹脂発泡体を
製造する方法としては、（イ）ポリプロピレン系樹脂を
架橋し、熱分解型発泡剤を用いて発泡する方法、（ロ）
高圧下でポリプロピレン系樹脂中に気体を練り込み、常
圧中に解放することにより発泡させる方法（押出し発泡
法、バッチ発泡法）等がある。しかしながら、いずれの
場合でも使用する樹脂の発泡適性を評価する手段に乏し
いため、美麗な発泡体を得ることが非常に困難であっ
た。2. Description of the Related Art Conventionally, polypropylene resin foams have been widely used as cushioning materials and heat insulating materials because of their excellent flexibility and heat insulating properties. As a method for producing a polypropylene-based resin foam, (a) a method in which a polypropylene-based resin is cross-linked and foamed using a thermal decomposition type foaming agent, (b)
There is a method in which a gas is kneaded into a polypropylene-based resin under a high pressure and is foamed by releasing under a normal pressure (extrusion foaming method, batch foaming method) and the like. However, in either case, it is very difficult to obtain a beautiful foam because there are few means for evaluating the foaming suitability of the resin used.
【０００２】このような問題解決のために、例えば、架
橋方法、架橋助剤を工夫して樹脂物性を向上させる方法
が、特公昭５８−５７４５２号公報に記載されている
が、架橋が過度に進行するため発泡体の気泡形状を均一
に制御するのが難しく、異常気泡の部分から破れが起こ
り易いという問題点があった。In order to solve such a problem, for example, Japanese Patent Publication No. 58-57452 discloses a method for improving the physical properties of a resin by devising a crosslinking method and a crosslinking aid. Since it progresses, it is difficult to uniformly control the bubble shape of the foam, and there is a problem that breakage easily occurs from the abnormal bubble portion.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、以上
の問題点を解決し、発泡適性を評価する基準として樹脂
の溶融粘度に着目し、特定の伸長粘度を有するポリプロ
ピレン系樹脂組成物及びその発泡体を提供することにあ
る。An object of the present invention is to solve the above problems and pay attention to the melt viscosity of a resin as a criterion for evaluating foaming suitability, and to provide a polypropylene resin composition having a specific extensional viscosity and To provide the foam.
【０００４】[0004]
【課題を解決するための手段】本発明のポリプロピレン
系樹脂組成物は、ポリプロピレン系樹脂３０〜１００重
量％と前記ポリプロピレン系樹脂以外のポリオレフィン
系樹脂７０〜０重量％からなる樹脂混合物１００重量部
及び熱分解型有機発泡剤１〜４０重量部よりなる樹脂組
成物であって、一軸伸長粘度計により一定の歪み速度
０．１／ｓｅｃで測定された伸長粘度ならびに、ｌｏｇ
（時間）対ｌｏｇ（伸長粘度）の関係を示す伸長粘度曲
線において、特定の条件を満足する。The polypropylene resin composition of the present invention comprises 100 parts by weight of a resin mixture comprising 30 to 100% by weight of a polypropylene resin and 70 to 0% by weight of a polyolefin resin other than the polypropylene resin. A resin composition comprising 1 to 40 parts by weight of a pyrolyzable organic foaming agent, and an elongational viscosity measured by a uniaxial elongational viscometer at a constant strain rate of 0.1 / sec, and a log
A specific condition is satisfied in the extensional viscosity curve showing the relationship between (time) and log (extensional viscosity).
【０００５】本発明のポリプロピレン系樹脂組成物で
は、樹脂成分として特定のポリプロピレン系樹脂と前記
ポリプロピレン系樹脂以外のポリオレフィン系樹脂から
なる樹脂混合物が用いられる。In the polypropylene resin composition of the present invention, a resin mixture comprising a specific polypropylene resin as a resin component and a polyolefin resin other than the polypropylene resin is used.
【０００６】上記ポリプロピレン系樹脂としては、プロ
ピレンの単独重合体及びプロピレンを主成分とする共重
合体が挙げられる。上記共重合体としては、プロピレン
とプロピレン以外のα−オレフィンとの共重合体が好ま
しく、該共重合体中のプロピレン成分の割合が少なくな
ると耐熱性が低下するので、構成成分としてプロピレン
成分を８５重量％以上含有するものが好ましい。Examples of the polypropylene resin include propylene homopolymers and copolymers containing propylene as a main component. As the above-mentioned copolymer, a copolymer of propylene and an α-olefin other than propylene is preferable, and when the proportion of the propylene component in the copolymer is low, the heat resistance is lowered. Those containing more than wt% are preferable.
【０００７】上記α−オレフィンとしては、例えば、エ
チレン、１−ヘキセン、４−メチル−１−ペンテン、１
−オクテン、１−ブテン、１−ペンテン等が挙げられ
る。Examples of the α-olefin include ethylene, 1-hexene, 4-methyl-1-pentene, 1
-Octene, 1-butene, 1-pentene and the like.
【０００８】上記ポリオレフィン系樹脂としては、低密
度ポリエチレン、高密度ポリエチレン、直鎖密度ポリエ
チレン等のポリエチレン系樹脂；ポリプロピレン（上記
混合物に使用されるものを除く）、ポリブテン−１、ポ
リ−４−メチルペンテン−１等のα−オレフィン単独重
合体；エチレン−酢酸ビニル共重合体、エチレン−アク
リル酸共重合体、エチレン−プロピレン共重合体、エチ
レン−プロピレン−ジエン共重合体等の共重合体が挙げ
られ、これらは単独で用いられてもよく、二種以上が併
用されてもよい。Examples of the above polyolefin resin include polyethylene resins such as low density polyethylene, high density polyethylene and linear density polyethylene; polypropylene (excluding those used in the above mixture), polybutene-1, poly-4-methyl. Α-olefin homopolymers such as pentene-1; copolymers such as ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, ethylene-propylene copolymers, ethylene-propylene-diene copolymers and the like. These may be used alone or in combination of two or more.
【０００９】上記樹脂混合物におけるポリプロピレン系
樹脂の割合は、少なくなると発泡性や耐熱性が低下する
ので、３０重量％以上に限定される。The proportion of the polypropylene resin in the above resin mixture is limited to 30% by weight or more because the foamability and heat resistance decrease as the proportion decreases.
【００１０】本発明のポリプロピレン系樹脂組成物に用
いられる熱分解型有機発泡剤としては、加熱によって分
解ガスを発生するものであって、例えば、アゾジカルボ
ンアミド、ベンゼンスルホニルヒドラジド、ジニトロソ
ペンタメチレンテトラミン、トルエンスルホニルヒドラ
ジド、４，４−オキシビス（ベンゼンスルホニルヒドラ
ジド）等が挙げられる。The heat-decomposable organic foaming agent used in the polypropylene resin composition of the present invention generates a decomposition gas upon heating, and examples thereof include azodicarbonamide, benzenesulfonyl hydrazide and dinitrosopentamethylenetetramine. , Toluenesulfonyl hydrazide, 4,4-oxybis (benzenesulfonyl hydrazide) and the like.
【００１１】上記ポリプロピレン系樹脂組成物におい
て、上記熱分解型有機発泡剤の使用量は、少なくなると
所定の発泡倍率が得られず、多くなると異常発泡が起こ
り美麗な発泡体が得られなくなるので、上記樹脂混合物
１００重量部に対して、１〜４０重量部に制限される。In the polypropylene resin composition, if the amount of the pyrolyzable organic foaming agent used is small, a predetermined expansion ratio cannot be obtained, and if it is too large, abnormal foaming occurs and a beautiful foam cannot be obtained. It is limited to 1 to 40 parts by weight with respect to 100 parts by weight of the resin mixture.
【００１２】上記樹脂組成物には、必要に応じて、得ら
れる発泡体の物性を損なわない範囲で、フェノール系、
リン系、イオウ系、アミン系等の酸化防止剤の他、金属
害防止剤、難燃剤、充填剤、帯電防止剤、安定剤、顔料
などが添加されてもよい。If necessary, the above resin composition may contain a phenolic resin, within a range not impairing the physical properties of the resulting foam.
In addition to phosphorus-based, sulfur-based, amine-based and other antioxidants, metal damage inhibitors, flame retardants, fillers, antistatic agents, stabilizers, pigments and the like may be added.
【００１３】上記樹脂組成物は、上記各成分を単軸押出
機、二軸押出機、バンバリーミキサー、ニーダーミキサ
ー、ロール等の混練装置を用いて、熱分解型有機発泡剤
の分解温度よりも低い温度で溶融混練しシート状に成形
した後、該シート状物を熱分解型有機発泡剤の分解温度
以上に加熱して発泡させる方法が挙げられる。The above resin composition is prepared by mixing each of the above components with a kneading machine such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader mixer, or a roll, and lower than the decomposition temperature of the heat-decomposable organic foaming agent. Examples include a method of melting and kneading at a temperature to form a sheet, and then heating the sheet to a temperature equal to or higher than the decomposition temperature of the thermal decomposition type organic foaming agent to foam.
【００１４】上記ポリプロピレン系樹脂組成物は、一軸
伸長粘度計により一定の歪み速度０．１／ｓｅｃで測定
された伸長粘度から得られるｌｏｇ（時間）対ｌｏｇ
（伸長粘度）の関係を示す伸長粘度曲線において、図１
に示すように、低伸長時における変曲点ａから高伸長時
における変曲点ｂまでを第１の部分とし、変曲点ｂ以降
を第２の部分とするとき、次の（イ）、（ロ）及び
（ハ）の条件を満足する。The above polypropylene-based resin composition is obtained from elongational viscosity measured by a uniaxial elongational viscometer at a constant strain rate of 0.1 / sec, log (time) vs. log.
In the extensional viscosity curve showing the relationship of (elongational viscosity), FIG.
As shown in, when the inflection point a at the time of low extension to the inflection point b at the time of high extension is set as the first portion and the inflection point b and subsequent points are set as the second portion, the following (a), The conditions (b) and (c) are satisfied.
【００１５】（イ）伸長粘度曲線の第１の部分の勾配が
０．５以上０．９未満である。 （ロ）伸長粘度曲線の第２の部分の勾配が２以上６未満
である。 （ハ）伸長粘度の測定において、伸長開始１秒後の粘度
が１×１０4 ｐｏｉｓｅ以上５×１０5 ｐｏｉｓｅ未満
である。(A) The slope of the first portion of the extensional viscosity curve is 0.5 or more and less than 0.9. (B) The slope of the second portion of the extensional viscosity curve is 2 or more and less than 6. (C) In the measurement of elongational viscosity, the viscosity one second after the initiation of elongation is 1 × 10 4 poise or more and less than 5 × 10 5 poise.
【００１６】ここでいう勾配とは、ｌｏｇ（時間）を横
軸とし、ｌｏｇ（伸長粘度）を縦軸として得られた図１
に示す伸長粘度曲線において、ｌｏｇ（伸長粘度）のｌ
ｏｇ（時間）に関する平均勾配であり、それぞれ数
（１）及び（２）で表される。The term "gradient" used herein means log (time) on the horizontal axis and log (elongation viscosity) on the vertical axis.
In the extensional viscosity curve shown in, the log (elongational viscosity) of l
It is the average slope for og (time) and is represented by the numbers (1) and (2), respectively.
【００１７】[0017]
【数１】 (Equation 1)
【００１８】上記粘度曲線の第１の部分の勾配は、０．
５未満であると発泡初期の伸長粘度が高くなり過ぎて発
泡性が悪くなり、０．９以上であると伸長粘度が高くな
り過ぎて発泡が困難となる。The slope of the first part of the viscosity curve is 0.
When it is less than 5, the elongational viscosity at the initial stage of foaming becomes too high and the foamability deteriorates. When it is 0.9 or more, the elongational viscosity becomes too high and foaming becomes difficult.
【００１９】上記粘度曲線の第２の部分の勾配は、２未
満であると高伸長時の伸長粘度が低すぎるためガス抜け
が起こるなどして発泡性が低下し、６以上であると伸長
粘度の変化が激しくなるため均一に発泡せず発泡性が低
下する。If the slope of the second part of the above-mentioned viscosity curve is less than 2, the elongation viscosity at high elongation is too low so that gas escape occurs and the foamability is lowered, and if it is 6 or more, the elongation viscosity is too low. Changes significantly, and the foaming property is deteriorated without uniform foaming.
【００２０】上記伸長開始１秒後の伸長粘度は、１×１
０4 ｐｏｉｓｅ未満であると必要な伸長粘度が得られず
発泡性が低下し、５×１０5 ｐｏｉｓｅ以上であると伸
長粘度が高くなり過ぎて所定の発泡倍率が得られなくな
る。The extension viscosity 1 second after the start of extension is 1 × 1.
When it is less than 0 4 poise, the required extensional viscosity cannot be obtained and the foamability is lowered, and when it is 5 × 10 5 poise or more, the extensional viscosity becomes too high and a predetermined expansion ratio cannot be obtained.
【００２１】上記伸長粘度は、東洋精機社製一軸伸長粘
度計「メルテンレオメーター」を用いて、２１０℃、一
定の歪み速度０．１／ｓｅｃの条件で測定される。The extensional viscosity is measured using a uniaxial extensional viscometer "Merten Rheometer" manufactured by Toyo Seiki Co., Ltd., under the conditions of 210 ° C. and a constant strain rate of 0.1 / sec.
【００２２】上記（イ）〜（ハ）の条件を満足する伸長
粘度を得るために、例えば、次の方法が考えられる。 （１）樹脂組成物に対し電離性放射線を照射して架橋す
る。 （２）樹脂組成物に過酸化物を加えて樹脂ラジカルを発
生させ架橋する。 （３）超高分子量を含むか又は長鎖分岐をもつなど長時
間緩和成分をもつような樹脂を使用する （４）長鎖モノマーを樹脂にグラフトさせて長時間緩和
成分を導入する。 （５）反応押出しなどにより樹脂同士をグラフト架橋す
る。In order to obtain the extensional viscosity satisfying the above conditions (a) to (c), for example, the following method can be considered. (1) The resin composition is irradiated with ionizing radiation to crosslink. (2) A peroxide is added to the resin composition to generate resin radicals and crosslink. (3) Use a resin containing an ultrahigh molecular weight or having a long-term relaxation component such as having long-chain branching. (4) Introducing the long-term relaxation component by grafting a long-chain monomer onto the resin. (5) The resins are graft-crosslinked with each other by reactive extrusion or the like.
【００２３】上記（１）〜（５）の方法が適用される樹
脂は、ポリプロピレン系樹脂又はポリエチレン系樹脂の
いずれであってもよい。The resin to which the above methods (1) to (5) are applied may be either polypropylene resin or polyethylene resin.
【００２４】[0024]
【発明の実施の形態】以下に、実施例を示すが、本発明
はこれによって限定されるものではない。 （実施例１）共重合成分としてエチレン成分を含むポリ
プロピレン系樹脂５０重量部と超高分子量成分を含む高
密度ポリエチレン（重量平均分子量＝２．５×１０5 、
重量平均分子量／数平均分子量＝１９）５０重量部から
なる樹脂混合物に、アゾジカルボンアミド９．５重量
部、トリメチロールプロパントリメタクリレート（架橋
助剤）２．５重量部ならびに適当量の酸化防止剤及び金
属防止剤を加えた樹脂組成物を、２本ロールを用いて１
７０℃で溶融混練してポリプロピレン系樹脂組成物を得
た。得られたポリプロピレン系樹脂組成物を熱プレスで
プレス成形して、厚さ１．５ｍｍの樹脂シートを得た
後、この樹脂シートに照射線量２Ｍｒａｄの電子線照射
を行い架橋した。次いで、この架橋樹脂シートをオーブ
ンに入れ、温度２５０℃で５分間発泡させてポリプロピ
レン系樹脂発泡体を得た。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is described below by way of examples, but the present invention is not limited thereto. (Example 1) 50 parts by weight of a polypropylene resin containing an ethylene component as a copolymerization component and high-density polyethylene containing an ultrahigh molecular weight component (weight average molecular weight = 2.5 × 10 5 ,
Weight average molecular weight / number average molecular weight = 19) A resin mixture consisting of 50 parts by weight, 9.5 parts by weight of azodicarbonamide, 2.5 parts by weight of trimethylolpropane trimethacrylate (crosslinking aid) and an appropriate amount of antioxidant A resin composition containing a metal inhibitor and
Melt kneading at 70 ° C. to obtain a polypropylene resin composition. The polypropylene-based resin composition obtained was press-molded by hot pressing to obtain a resin sheet having a thickness of 1.5 mm, and the resin sheet was irradiated with an electron beam at an irradiation dose of 2 Mrad to be crosslinked. Next, this crosslinked resin sheet was placed in an oven and foamed at a temperature of 250 ° C. for 5 minutes to obtain a polypropylene resin foam.
【００２５】（実施例２）電子線照射線量を４Ｍｒａｄ
に変えたこと以外は、実施例１と同様にして、ポリプロ
ピレン系樹脂発泡体を得た。(Embodiment 2) The electron beam irradiation dose is set to 4 Mrad.
A polypropylene resin foam was obtained in the same manner as in Example 1 except that the above was changed to.
【００２６】（実施例３）電子線照射線量を６Ｍｒａｄ
に変えたこと以外は、実施例１と同様にして、ポリプロ
ピレン系樹脂発泡体を得た。(Embodiment 3) The electron beam irradiation dose is set to 6 Mrad.
A polypropylene resin foam was obtained in the same manner as in Example 1 except that the above was changed to.
【００２７】（実施例４）電子線照射線量を８Ｍｒａｄ
に変えたこと以外は、実施例１と同様にして、ポリプロ
ピレン系樹脂発泡体を得た。(Embodiment 4) The electron beam irradiation dose is set to 8 Mrad.
A polypropylene resin foam was obtained in the same manner as in Example 1 except that the above was changed to.
【００２８】（比較例１）電子線照射量を２０Ｍｒａｄ
に変えたこと以外は、実施例１と同様にして、ポリプロ
ピレン系樹脂発泡体を得た。(Comparative Example 1) The electron beam irradiation dose was 20 Mrad.
A polypropylene resin foam was obtained in the same manner as in Example 1 except that the above was changed to.
【００２９】（比較例２）架橋助剤の使用量を１．５重
量部としたこと以外は、実施例１と同様にして、ポリプ
ロピレン系樹脂発泡体を得た。Comparative Example 2 A polypropylene resin foam was obtained in the same manner as in Example 1 except that the amount of the crosslinking aid used was 1.5 parts by weight.
【００３０】上記実施例及び比較例で得られたポリプロ
ピレン系樹脂組成物及びその発泡体につき、下記の測定
及び評価を行いその結果を表１に示した。 （Ｉ）発泡倍率 発泡前の樹脂シート及び樹脂シートを発泡させた発泡体
の密度を測定し、発泡倍率を次式から算出した。 発泡倍率（ｃｃ／ｇ）＝発泡前樹脂シートの密度／発泡
体密度The polypropylene-based resin compositions and foams thereof obtained in the above Examples and Comparative Examples were measured and evaluated as follows, and the results are shown in Table 1. (I) Expansion Ratio The density of the resin sheet before expansion and the foamed product obtained by expanding the resin sheet were measured, and the expansion ratio was calculated from the following formula. Foaming ratio (cc / g) = density of resin sheet before foaming / foam density
【００３１】（II）外観評価 ポリプロピレン系樹脂発泡体の外観を目視で観察して、
次の基準で外観評価を行った。 ○：気泡径が均一に揃っているもの ×：巨大気泡など異常気泡が存在するもの(II) Appearance evaluation The appearance of the polypropylene resin foam was visually observed,
The appearance was evaluated according to the following criteria. ○: Uniform bubble diameter ×: Abnormal bubble such as giant bubble
【００３２】（III)伸長粘度 ポリプロピレン系樹脂組成物を押出し成形したロッド状
物を試料として、東洋精機社製一軸伸長粘度計「メルテ
ンレオメーター」を用いて、２１０℃、一定の歪み速度
０．１／ｓｅｃの条件で測定し、伸長開始１秒後の伸長
粘度ならびに、伸長粘度から得られるｌｏｇ（時間）対
ｌｏｇ（伸長粘度）の関係を示す伸長粘度曲線から、第
１の部分の勾配及び第２の部分の勾配を求めた。(III) Elongational Viscosity A rod-shaped material obtained by extruding a polypropylene-based resin composition was used as a sample, and a uniaxial elongational viscometer “Merten Rheometer” manufactured by Toyo Seiki Co., Ltd. was used at 210 ° C. and a constant strain rate of 0. The slope of the first part was determined from the extensional viscosity curve measured 1 second after the initiation of extension and the extensional viscosity curve showing the relationship between log (time) and log (elongational viscosity) obtained from the extensional viscosity. And the slope of the second part was determined.
【００３３】[0033]
【表１】 [Table 1]
【００３４】[0034]
【発明の効果】本発明のポリプロピレン系樹脂組成物の
構成は、上述した通りであり、伸長粘度を特定の範囲に
コントロールすることにより、気泡が均一で美麗な発泡
体を得ることができる。The composition of the polypropylene resin composition of the present invention is as described above, and by controlling the extensional viscosity within a specific range, a foam having uniform cells and beautiful appearance can be obtained.
【図１】一軸伸長粘度計で測定された伸長粘度曲線の一
例を示すグラフである。FIG. 1 is a graph showing an example of an extensional viscosity curve measured by a uniaxial extensional viscometer.
Claims (2)
と前記ポリプロピレン系樹脂以外のポリオレフィン系樹
脂７０〜０重量％からなる樹脂混合物１００重量部及び
熱分解型有機発泡剤１〜４０重量部よりなる樹脂組成物
であって、一軸伸長粘度計により一定の歪み速度０．１
／ｓｅｃで測定された伸長粘度から得られるｌｏｇ（時
間）対ｌｏｇ（伸長粘度）の関係を示す伸長粘度曲線に
おいて、低伸長時における変曲点ａから高伸長時におけ
る変曲点ｂまでを第１の部分とし、変曲点ｂ以降を第２
の部分とするとき、次の（イ）、（ロ）及び（ハ）の条
件を満足することを特徴とするポリプロピレン系樹脂組
成物。 （イ）第１の部分の粘度曲線の勾配が０．５以上０．９
未満である。 （ロ）第２の部分の粘度曲線の勾配が２以上６未満であ
る。 （ハ）伸長開始１秒後の伸長粘度が１×１０4 ｐｏｉｓ
ｅ以上５×１０5 ｐｏｉｓｅ未満である。1. Polypropylene resin 30 to 100% by weight
And a resin composition comprising 100 parts by weight of a resin mixture consisting of 70 to 0% by weight of a polyolefin resin other than the polypropylene resin and 1 to 40 parts by weight of a pyrolyzable organic foaming agent, which is constant by a uniaxial elongation viscometer. Strain rate 0.1
In the extensional viscosity curve showing the relationship between log (time) and log (elongational viscosity) obtained from the extensional viscosity measured in / sec, from the inflection point a at low extension to the inflection point b at high extension 1 and the second point after the inflection point b
The polypropylene resin composition is characterized by satisfying the following conditions (a), (b) and (c). (B) The gradient of the viscosity curve of the first part is 0.5 or more and 0.9
Is less than. (B) The gradient of the viscosity curve of the second portion is 2 or more and less than 6. (C) The extension viscosity 1 second after the start of extension is 1 × 10 4 pois.
e or more and less than 5 × 10 5 poise.
物が、加熱により発泡させられてなるポリプロピレン系
樹脂発泡体。2. A polypropylene resin foam obtained by foaming the polypropylene resin composition according to claim 1 by heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31132895A JPH09151267A (en) | 1995-11-29 | 1995-11-29 | Polypropylene resin composition and its foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31132895A JPH09151267A (en) | 1995-11-29 | 1995-11-29 | Polypropylene resin composition and its foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09151267A true JPH09151267A (en) | 1997-06-10 |
Family
ID=18015818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31132895A Pending JPH09151267A (en) | 1995-11-29 | 1995-11-29 | Polypropylene resin composition and its foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09151267A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001164123A (en) * | 1999-12-09 | 2001-06-19 | Techno Polymer Co Ltd | Thermoplastic resin composition |
-
1995
- 1995-11-29 JP JP31132895A patent/JPH09151267A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001164123A (en) * | 1999-12-09 | 2001-06-19 | Techno Polymer Co Ltd | Thermoplastic resin composition |
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