JPH0676507B2 - Method for producing polypropylene-based resin foam - Google Patents
Method for producing polypropylene-based resin foamInfo
- Publication number
- JPH0676507B2 JPH0676507B2 JP61034902A JP3490286A JPH0676507B2 JP H0676507 B2 JPH0676507 B2 JP H0676507B2 JP 61034902 A JP61034902 A JP 61034902A JP 3490286 A JP3490286 A JP 3490286A JP H0676507 B2 JPH0676507 B2 JP H0676507B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- ethylene
- foaming
- propylene
- resin
- 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 - Fee Related
Links
- 239000006260 foam Substances 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920005673 polypropylene based resin Polymers 0.000 title claims description 4
- 229920005989 resin Polymers 0.000 claims description 29
- 239000011347 resin Substances 0.000 claims description 29
- 238000005187 foaming Methods 0.000 claims description 24
- 239000004088 foaming agent Substances 0.000 claims description 17
- -1 polypropylene Polymers 0.000 claims description 15
- 239000004743 Polypropylene Substances 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 claims description 11
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 229920001384 propylene homopolymer Polymers 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 7
- 239000005977 Ethylene Substances 0.000 claims description 7
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 claims description 5
- 229940029284 trichlorofluoromethane Drugs 0.000 claims description 5
- 238000004898 kneading Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920005675 propylene-butene random copolymer Polymers 0.000 description 2
- 229920005604 random copolymer Polymers 0.000 description 2
- ZXUJWPHOPHHZLR-UHFFFAOYSA-N 1,1,1-trichloro-2-fluoroethane Chemical compound FCC(Cl)(Cl)Cl ZXUJWPHOPHHZLR-UHFFFAOYSA-N 0.000 description 1
- PMPVIKIVABFJJI-UHFFFAOYSA-N Cyclobutane Chemical compound C1CCC1 PMPVIKIVABFJJI-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229960003750 ethyl chloride Drugs 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- UHCBBWUQDAVSMS-UHFFFAOYSA-N fluoroethane Chemical compound CCF UHCBBWUQDAVSMS-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940073584 methylene chloride Drugs 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はポリプロピレン系樹脂発泡体の製造方法に関す
る。TECHNICAL FIELD The present invention relates to a method for producing a polypropylene resin foam.
ポリプロピレン樹脂は耐熱性、機械的強度等の諸物性に
優れ、このため近年ポリプロピレン樹脂発泡体は断熱
材、緩衝材、構築材等の広い分野に利用されている。Polypropylene resin is excellent in various physical properties such as heat resistance and mechanical strength. Therefore, in recent years, polypropylene resin foam has been used in a wide variety of fields such as heat insulating materials, cushioning materials, and construction materials.
従来熱可塑性樹脂発泡体を製造する一般的方法として、
押出機内で樹脂と発泡剤とを溶融混練し、この発泡性混
練物を発泡に適した温度に調整した後、押出機より押出
して発泡せしめる方法が知られているが、ポリプロピレ
ン樹脂は発泡に適した粘弾性となる温度範囲がきわめて
狭いため、発泡適正温度の調整が困難であり、単にポリ
プロピレン樹脂を発泡剤とともに溶融混練して押出発泡
せしめるだけでは良好な発泡体は得られ難いという問題
があった。As a general method for producing a conventional thermoplastic resin foam,
A method is known in which a resin and a foaming agent are melt-kneaded in an extruder, and the foamable kneaded product is adjusted to a temperature suitable for foaming, and then extruded from an extruder to foam, but polypropylene resin is suitable for foaming. Since the temperature range of viscoelasticity is extremely narrow, it is difficult to adjust the proper foaming temperature, and it is difficult to obtain a good foam by simply melt-kneading a polypropylene resin with a foaming agent and extruding. It was
上記問題点を解決するため、従来より種々の方法が提案
されており、例えばポリプロピレンに融点140℃以下
の樹脂を混合し、この樹脂混合物を臨界温度が160度以
上の揮発性発泡剤と溶融混練した後、押出発泡する方法
（特開昭60−255834号）、エチレン−プロピレンブロ
ック共重合体にエチレン−プロピレン−ブテンランダム
共重合体を混合して発泡剤と溶融混練した後、押出発泡
する方法（特開昭58−49730号、特開昭60−31538号）等
が知られている。In order to solve the above problems, various methods have been conventionally proposed, for example, polypropylene is mixed with a resin having a melting point of 140 ° C. or lower, and the resin mixture is melt-kneaded with a volatile foaming agent having a critical temperature of 160 ° C. or higher. Then, extrusion foaming method (JP-A-60-255834), ethylene-propylene block copolymer and ethylene-propylene-butene random copolymer are mixed and melt-kneaded with a foaming agent, and then extrusion foaming. (JP-A-58-49730, JP-A-60-31538) and the like are known.
上記の方法はいずれもポリプロピレン樹脂発泡体を製造
する際に問題となっていた発泡適正温度範囲が狭い欠点
を解決し、しかもポリプロピレン樹脂の有する優れた物
性を充分に発現し得る発泡体を提供することを目的とし
ているが、の方法では融点140℃以下の樹脂のポリプ
ロピレンに対する混合量が少ないと発泡適正温度範囲を
広げることができず、逆に混合量を多くすると発泡適正
温度範囲は広げることはできるが、発泡体の耐熱性が大
きく低下し易いという欠点があった。またの方法で用
いるエチレン−プロピレン−ブテンランダム共重合体は
比較的高価なため、添加量が多くなると発泡適正温度範
囲を広げることはできるものの、発泡体の価格が高いも
のとなるという欠点があった。更に、の方法のいず
れも得られる発泡体が連続気泡になり易い欠点を有し、
独立気泡率の高い発泡体を得るためには発泡条件を厳密
に設定する必要があり、発泡条件の管理が煩雑となると
いう問題があった。All of the above methods solve the problem that the proper foaming temperature range is narrow, which has been a problem in producing a polypropylene resin foam, and provide a foam capable of sufficiently exhibiting the excellent physical properties of the polypropylene resin. However, in the method of (1), if the mixing amount of the resin having a melting point of 140 ° C. or less with respect to polypropylene is small, the proper foaming temperature range cannot be expanded. Conversely, if the mixing amount is increased, the foaming proper temperature range cannot be expanded. However, there is a drawback in that the heat resistance of the foam tends to be greatly reduced. Further, since the ethylene-propylene-butene random copolymer used in the other method is relatively expensive, there is a drawback that the cost of the foam becomes expensive although the foaming proper temperature range can be widened when the addition amount increases. It was Furthermore, in any of the above methods, the obtained foam has a drawback that it tends to become open cells,
In order to obtain a foam having a high closed cell rate, it is necessary to strictly set the foaming conditions, and there is a problem that the management of the foaming conditions becomes complicated.
本発明者らは上記の点に鑑み鋭意研究した結果、プロピ
レン単独重合体及び／又はエチレン−プロピレンブロッ
ク共重合体と、エチレン−プロピレンランダム共重合体
とを特定量の揮発性発泡剤と混合して用い、特定発泡温
度で発泡することにより容易に優れたポリプロピレン系
樹脂発泡体を得ることができることを見出し本発明を完
成するに至った。As a result of intensive studies in view of the above points, the present inventors have mixed a propylene homopolymer and / or an ethylene-propylene block copolymer, and an ethylene-propylene random copolymer with a specific amount of a volatile foaming agent. The inventors have found that an excellent polypropylene-based resin foam can be easily obtained by foaming at a specific foaming temperature.
即ち本発明は30重量％を超え、且つ95重量％未満のプロ
ピレン単独重合体及び／又はエチレン−プロピレンブロ
ック共重合体と、５重量％を超え、且つ70重量％未満の
エチレン−プロピレンランダム共重合体とからなる樹脂
混合物を、該樹脂混合物100重量部当たり、10〜100重量
部の揮発性発泡剤とともに押出機内で溶融混練した後、
上記樹脂混合物のうちの融点の低い方の樹脂の融点以下
の温度で押出機より押出して発泡せしめることを特徴と
するポリプロピレン系樹脂発泡体の製造方法を要旨とす
るものである。That is, the present invention relates to a propylene homopolymer and / or an ethylene-propylene block copolymer of more than 30% by weight and less than 95% by weight, and an ethylene-propylene random copolymer of more than 5% by weight and less than 70% by weight. A resin mixture consisting of a coalescent, per 100 parts by weight of the resin mixture, after melt-kneading in an extruder with 10 to 100 parts by weight of a volatile foaming agent,
A gist of the present invention is to provide a method for producing a polypropylene-based resin foam, which comprises extruding from an extruder to foam at a temperature not higher than the melting point of the resin having the lower melting point in the resin mixture.
本発明において用いられるプロピレン単独重合体のメル
トフローレイト（以下、MFRと略称する）は0.1〜15g/10
分が好ましい。エチレン−プロピレンブロック共重合体
はエチレン成分１〜30重量％、MFR0.1〜15g/10分、特に
エチレン成分２〜20重量％、MFR0.5〜8g/10分であるこ
とが好ましい。またエチレン−プロピレンランダム共重
合体はエチレン成分１〜10重量％、MFR0.1〜15g/10分、
特にエチレン成分２〜８重量％、MFR0.5〜8g/10分が好
ましい。更にプロピレン単独重合体及び／又はエチレン
−プロピレンブロック共重合体のMFRとエチレン−プロ
ピレンランダム共重合体のMFRは近似していることが好
ましく、その差は５以内であることが好ましい。The propylene homopolymer used in the present invention has a melt flow rate (hereinafter, abbreviated as MFR) of 0.1 to 15 g / 10.
Minutes are preferred. The ethylene-propylene block copolymer preferably has an ethylene component of 1 to 30% by weight and an MFR of 0.1 to 15 g / 10 min, particularly an ethylene component of 2 to 20% by weight and an MFR of 0.5 to 8 g / 10 min. The ethylene-propylene random copolymer is 1 to 10% by weight of ethylene component, MFR 0.1 to 15 g / 10 minutes,
Particularly, ethylene component of 2 to 8% by weight and MFR of 0.5 to 8 g / 10 minutes are preferable. Further, the MFR of the propylene homopolymer and / or the ethylene-propylene block copolymer and the MFR of the ethylene-propylene random copolymer are preferably close to each other, and the difference is preferably 5 or less.
本発明において上記プロピレン単独重合体及び／又はエ
チレン−プロピレンブロック共重合体と、エチレン−プ
ロピレンランダム共重合体との混合割合は、発泡適正温
度範囲を発泡を容易に行い得る程度に広げることがで
き、かつ優れた発泡体を得る上で、プロピレン単独重合
体及び／又はエチレン−プロピレンブロック共重合体は
30重量％を越え、且つ95重量％未満、エチレン−プロピ
レンランダム共重合体は５重量％を越え、且つ70重量％
未満である。In the present invention, the mixing ratio of the propylene homopolymer and / or the ethylene-propylene block copolymer and the ethylene-propylene random copolymer can widen the proper foaming temperature range to the extent that foaming can be easily performed. And, in order to obtain an excellent foam, a propylene homopolymer and / or an ethylene-propylene block copolymer is
More than 30 wt% and less than 95 wt%, ethylene-propylene random copolymer more than 5 wt% and 70 wt%
Is less than.
上記プロピレン単独重合体及び／又はエチレン−プロピ
レンブロック共重合体と、エチレン−プロピレンランダ
ム共重合体とからなる樹脂混合物を押出機内で溶融した
後、発泡剤を添加して混練するが、本発明においてこの
発泡剤としては、ポリプロピレン系樹脂の発泡に用いら
れる通常の発泡剤を用いることができる。上記発泡剤と
しては例えばプロパン、ブタン、ヘキサン等の脂肪族炭
化水素類；シクロブタン、シクロペンタン等の環式脂肪
族炭化水素類；トリクロロフロロメタン、ジクロロジフ
ロロメタン、トリクロロフロロエタン、ジクロロテトラ
フロロエタン、メチルクロライド、メチレンクロライ
ド、エチルクロライド等のハロゲン化炭化水素類等の揮
発性発泡剤が挙げられるが、なかでもトリクロロフロロ
メタンを主成分とする混合発泡剤が好ましく、特にトリ
クロロフロロメタンとジクロロテトラフロロエタンとの
混合発泡剤が好ましい。発泡剤の添加量は樹脂混合物10
0重量部当り、10〜100重量部である。The propylene homopolymer and / or ethylene-propylene block copolymer, and a resin mixture comprising an ethylene-propylene random copolymer are melted in an extruder, and then a foaming agent is added and kneaded. As this foaming agent, an ordinary foaming agent used for foaming polypropylene resin can be used. Examples of the foaming agent include aliphatic hydrocarbons such as propane, butane, and hexane; cycloaliphatic hydrocarbons such as cyclobutane and cyclopentane; trichlorofluoromethane, dichlorodifluoromethane, trichlorofluoroethane, dichlorotetrafluoroethane. Examples thereof include volatile foaming agents such as halogenated hydrocarbons such as methyl chloride, methylene chloride, ethyl chloride, etc. Among them, a mixed foaming agent containing trichlorofluoromethane as a main component is preferable, and trichlorofluoromethane and dichlorotetramethane are particularly preferable. A blowing agent mixed with fluoroethane is preferred. The amount of foaming agent added is 10
It is 10 to 100 parts by weight per 0 parts by weight.
溶融混練した発泡性樹脂組成物は押出機の例えばスクリ
ューにより押出機先端方向に移送され、この間に押出直
前の温度が所定の発泡温度となるように温度調節され、
次いで押出機先端に設置されたダイより押出されて発泡
せしめられるが、本発明においては上記発泡温度は樹脂
混合物のうち、融点の低い方の樹脂の融点以下である。The melt-kneaded expandable resin composition is transferred in the direction of the extruder tip by, for example, a screw of an extruder, during which the temperature immediately before extrusion is adjusted to a predetermined foaming temperature,
Next, it is extruded from a die installed at the tip of the extruder to be foamed. In the present invention, the foaming temperature is not higher than the melting point of the resin having the lower melting point in the resin mixture.
以下、実施例を挙げて本発明を更に詳細に説明する。 Hereinafter, the present invention will be described in more detail with reference to examples.
実施例１〜３、比較例１〜３ 第１表に示す樹脂を第２表に示す割合で混合し、この樹
脂100重量部当り、タルク0.03重量部及び第２表に示す
発泡剤を添加して45φの押出機内で溶融混練し、同表に
示す発泡温度にて押出発泡せしめシート状発泡体を得
た。得られた発泡体の性状を第２表にあわせて示す。Examples 1 to 3 and Comparative Examples 1 to 3 Resins shown in Table 1 were mixed at a ratio shown in Table 2, and 0.03 part by weight of talc and a foaming agent shown in Table 2 were added to 100 parts by weight of the resin. Melted and kneaded in a 45φ extruder, and extruded and foamed at a foaming temperature shown in the table to obtain a sheet-shaped foam. The properties of the obtained foam are also shown in Table 2.
尚、第２表の発泡剤の種類のうち、F11はトリクロロフ
ロロメタンを、F114はジクロロテトラフロロエタンを示
す。In addition, among the types of foaming agents shown in Table 2, F11 represents trichlorofluoromethane and F114 represents dichlorotetrafluoroethane.
〔発明の効果〕 本発明方法は30重量％を超え、且つ95重量％未満のプロ
ピレン単独重合体及び／又はエチレン−プロピレンブロ
ック共重合体と、５重量％を超え、且つ70重量％未満の
エチレン−プロピレンランダム共重合体とを混合して用
いたことにより、発泡適正温度範囲が広く、容易に発泡
を行い得るとともに、樹脂相互の相溶性が高く、独立気
泡性及び耐熱性に優れた発泡体が得られる。また本発明
方法によれば容易に独立気泡性の高い発泡体が得られ、
従来の方法のように独立気泡性の高い発泡体を得るため
の煩雑な発泡条件の設定を必要としない。しかも本発明
方法ではエチレン−プロピレンランダム共重合体の混合
割合がかなり多い場合でも得られる発泡体は実用上問題
のない耐熱性を有し、更にエチレン−プロピレンランダ
ム共重合体はエチレン−プロピレン−ブテンランダム共
重合体に比して安価であるため、優れた発泡体を安価に
提供し得る等の種々の効果を有する。 [Effect of the invention] The method of the present invention is more than 30% by weight and less than 95% by weight of propylene homopolymer and / or ethylene-propylene block copolymer, and more than 5% by weight and less than 70% by weight of ethylene. -By using a mixture with a propylene random copolymer, the foaming temperature range is wide, foaming can be easily carried out, the compatibility with the resin is high, and the foaming is excellent in closed cell properties and heat resistance. Is obtained. Further, according to the method of the present invention, a foam having a high closed cell property can be easily obtained,
Unlike the conventional method, it is not necessary to set complicated foaming conditions to obtain a foam having high closed cell properties. Moreover, in the method of the present invention, the foam obtained even when the mixing ratio of the ethylene-propylene random copolymer is considerably high has heat resistance which is practically no problem. Since it is cheaper than a random copolymer, it has various effects such as being able to provide an excellent foam at low cost.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−168634（ＪＰ，Ａ) 特開 昭62−158729（ＪＰ，Ａ) 特公 昭55−6658（ＪＰ，Ｂ２) 特公 昭58−31102（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A 61-168634 (JP, A) JP-A 62-158729 (JP, A) JP-B 55-6658 (JP, B2) JP-B 58- 31102 (JP, B2)
Claims (4)
ピレン単独重合体及び／又はエチレン−プロピレンブロ
ック共重合体と、５重量％を超え、且つ70重量％未満の
エチレン−プロピレンランダム共重合体とからなる樹脂
混合物を、該樹脂混合物100重量部当たり、10〜100重量
部の揮発性発泡剤とともに押出機内で溶融混練した後、
上記樹脂混合物のうちの融点の低い方の樹脂の融点以下
の温度で押出機より押出して発泡せしめることを特徴と
するポリプロピレン系樹脂発泡体の製造方法。1. A propylene homopolymer and / or an ethylene-propylene block copolymer of more than 30% by weight and less than 95% by weight, and an ethylene-propylene random copolymer of more than 5% by weight and less than 70% by weight. A resin mixture comprising a polymer, per 100 parts by weight of the resin mixture, after melt-kneading in an extruder with 10 to 100 parts by weight of a volatile blowing agent,
A method for producing a polypropylene-based resin foam, which comprises extruding at a temperature not higher than the melting point of a resin having a lower melting point of the resin mixture to cause foaming.
が、エチレン成分１〜30重量％、メルトフローレイト0.
1〜15g/10分である特許請求の範囲第１項記載のポリプ
ロピレン系樹脂発泡体の製造方法。2. An ethylene-propylene block copolymer having an ethylene component of 1 to 30% by weight and a melt flow rate of 0.
The method for producing a polypropylene resin foam according to claim 1, which has a weight of 1 to 15 g / 10 minutes.
が、エチレン成分１〜10重量％、メルトフローレイト0.
1〜15g/10分である特許請求の範囲第１項記載のポリプ
ロピレン系樹脂発泡体の製造方法。3. An ethylene-propylene random copolymer having an ethylene component of 1 to 10% by weight and a melt flow rate of 0.1.
The method for producing a polypropylene resin foam according to claim 1, which has a weight of 1 to 15 g / 10 minutes.
とする混合発泡剤である特許請求の範囲第１項記載のポ
リプロピレン系樹脂発泡体の製造方法。4. The method for producing a polypropylene resin foam according to claim 1, wherein the foaming agent is a mixed foaming agent containing trichlorofluoromethane as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61034902A JPH0676507B2 (en) | 1986-02-19 | 1986-02-19 | Method for producing polypropylene-based resin foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61034902A JPH0676507B2 (en) | 1986-02-19 | 1986-02-19 | Method for producing polypropylene-based resin foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62192430A JPS62192430A (en) | 1987-08-24 |
| JPH0676507B2 true JPH0676507B2 (en) | 1994-09-28 |
Family
ID=12427115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61034902A Expired - Fee Related JPH0676507B2 (en) | 1986-02-19 | 1986-02-19 | Method for producing polypropylene-based resin foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0676507B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2150722C (en) * | 1992-12-17 | 2004-05-25 | Chung P. Park | Extruded closed-cell propylene polymer foam and methods of making the same |
| KR101215057B1 (en) | 2010-12-02 | 2012-12-24 | 호남석유화학 주식회사 | Soft polypropylene resin composition having superior fine foam property |
| KR101372137B1 (en) * | 2011-12-20 | 2014-03-10 | 삼성토탈 주식회사 | Polypropylene Resin Composition for Expandable Bead |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6027073B2 (en) * | 1978-06-30 | 1985-06-27 | 凸版印刷株式会社 | Number inspection method |
| JPS5831102A (en) * | 1981-08-10 | 1983-02-23 | 有限会社駿河鉄工所 | Woman garment molding machine |
| JPS61168634A (en) * | 1985-01-21 | 1986-07-30 | Furukawa Electric Co Ltd:The | Production of propylene/ethylene copolymer foam |
| JPS62158729A (en) * | 1986-01-07 | 1987-07-14 | Showa Denko Kk | Heat-resistant shrinkable film |
-
1986
- 1986-02-19 JP JP61034902A patent/JPH0676507B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62192430A (en) | 1987-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4940736A (en) | Production of low density polypropylene foam | |
| US6417240B1 (en) | Foams prepared from blends of syndiotactic polypropylenes and thermoplastic polymers | |
| JP2767513B2 (en) | Polypropylene resin foam sheet | |
| AU758494B2 (en) | Foams prepared from blends of syndiotactic polypropylenes and thermoplastic polymers | |
| JPS63213531A (en) | Composition for noncrosslinked foam | |
| JPH0867758A (en) | Polypropylene resin foam and method for producing the same | |
| SE442017B (en) | METHOD OF PREPARING A CELL PLASTIC BODY OF A VINYL CHLORIDE BASED RESIN | |
| US6060533A (en) | Process for making foam articles having good low temperature toughness from high melt strength propyline polymer materials | |
| JP2779882B2 (en) | Method for producing polypropylene resin foam sheet with beautiful appearance | |
| JP5044589B2 (en) | Polyvinylidene fluoride-based resin foamed particles, and polyvinylidene fluoride-based resin foamed particles | |
| JPH0676507B2 (en) | Method for producing polypropylene-based resin foam | |
| JPS61118431A (en) | Improved foamed polypropylene and its article | |
| DE102013224275A1 (en) | Process for the preparation of expandable, thermoplastic polymer particles with improved blowing agent retention capacity | |
| JP3205225B2 (en) | Polypropylene resin foam | |
| JP2505543B2 (en) | Method for producing foam containing crystalline propylene resin | |
| JPS60110733A (en) | Expandable polyolefin resin composition | |
| JP3535259B2 (en) | Method for producing polypropylene resin foam | |
| JPS585930B2 (en) | Nannensei Polyolefin Inhatsupoutai Oyobi Sonoseizohouhou | |
| JPS5831102B2 (en) | Method for manufacturing polyolefin foam | |
| JP3306189B2 (en) | Olefin resin composition for foaming | |
| JP3892745B2 (en) | Method for producing polylactic acid resin foam | |
| JPH09227707A (en) | Production of polypropylene resin foam | |
| JPS60255834A (en) | Production of polypropylene resin foam | |
| JPS6065008A (en) | Crosslinkable/expandable ethylene/propylene/butene copolymer | |
| JPS599572B2 (en) | Manufacturing method of polyolefin foam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |