JPS5862024A - Manufacture of foamed plastic - Google Patents
Manufacture of foamed plasticInfo
- Publication number
- JPS5862024A JPS5862024A JP56160789A JP16078981A JPS5862024A JP S5862024 A JPS5862024 A JP S5862024A JP 56160789 A JP56160789 A JP 56160789A JP 16078981 A JP16078981 A JP 16078981A JP S5862024 A JPS5862024 A JP S5862024A
- Authority
- JP
- Japan
- Prior art keywords
- plastic
- water
- molded body
- foamed
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はポリエチレン、ポリ塩化ビニル、ポリプロピレ
ン等の比較的高温成形を喪しないプラスチック管発泡せ
しめる発泡プラスチックの製造方法に係るｔのである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a foamed plastic tube, which allows polyethylene, polyvinyl chloride, polypropylene, etc., to be foamed into a plastic tube without compromising molding at a relatively high temperature.
通常発泡プラスチツタ成形品を製造する場合にはプラス
チック中に化学発泡剤を混錬し、このコンノ９ウンド【
Ｈ，形した後、化学発泡剤の分解温度以上に７Ｘｌ熱し
１化学発泡剤會分解せしめ。Normally, when manufacturing foamed plastic molded products, a chemical foaming agent is mixed into the plastic, and this 9-pound [
H. After shaping, heat 7Xl above the decomposition temperature of the chemical blowing agent to decompose the chemical blowing agent.
Ｃれにより発泡プラスチックとしてｖｈたｔのである。Due to this, it can be used as a foamed plastic.
しかしこの方法によるとｔｌｌは、プラスチックの成形
温度で分解を起丁ような化学発泡剤１＊用で１！ないこ
とから必然的に発泡剤として使用できる物質か制約【受
けざる會得ない欠点かめる。However, according to this method, tll is 1! for a chemical foaming agent 1* that causes decomposition at the plastic molding temperature! This inevitably imposes restrictions on the substances that can be used as blowing agents.
本発明はか＼る状況に＠みてなされ７ｔ％ので、吸水性
樹脂【同梱脂の分解温度よｐ下で１００℃Ｌ′ｐ上の混
練成形温ＩＩ會肩するプラスチックとともに混練成型し
、ついでこの成型体を水蒸気処ｍ１ｔｔ、て吸水性樹脂
に水分ｔａ収さぜｆｔ彼。The present invention was made in view of such a situation, and the water-absorbing resin (7t%) is kneaded and molded with the supporting plastic at a kneading and molding temperature of 100℃L'p below the decomposition temperature of the included fat, and then This molded body is treated with steam to absorb moisture into a water-absorbing resin.
更に１００℃以上に加熱して吸水性樹脂に吸収されてい
る水分を蒸発気化せしめて発泡プラスチックとする発泡
プラスチックの製造方法にして１発泡剤は水となるので
従来のようにプラスチックによる発泡剤の選択の必要か
なく、吸水性樹脂の分解温度以下で混ｍｇ形されるプラ
スチックでるること及びプラスチックの成形温度か水の
沸点１００℃よｆｆ１ｌｂいことの２つ七満足丁ルフラ
スチックであれば如何なるプラスチックでも適用するこ
とができ、従って吸水性ｌ１１ｉ脂の分解温ｊ［が凡そ
２５０〜３００℃であること【考慮するとフッ票樹脂、
及びその他のエンジニアリングプラスチックの−１１に
は適用できないが汎用のポリエチレン、／り塩化ビニル
、ポリプロピレン勢Ｏプラスチックに框広く応用できる
ｔのである。Furthermore, in the manufacturing method of foamed plastic, in which the water absorbed in the water-absorbing resin is evaporated by heating to 100°C or more, the foaming agent is water, so it is not necessary to use plastic as a foaming agent as in the past. There is no need to make a selection, but what if it is a plastic that satisfies two things: it is a plastic that can be mixed and molded at a temperature below the decomposition temperature of the water-absorbent resin, and the molding temperature of the plastic is higher than the boiling point of water, which is 100°C. It can also be applied to plastics, therefore, the decomposition temperature j of water-absorbing l11i fat is approximately 250 to 300°C.
Although it cannot be applied to -11 and other engineering plastics, it can be widely applied to general-purpose polyethylene, polyvinyl chloride, and polypropylene-based plastics.
本発明によれば必要な発泡状ｌｌｌを得るためのプラス
チックの最適粘ｆを、温ｇＩＬｔ−制御することによっ
て決定する仁とができるので％［１ｍの発泡状ＩＩＩｔ
−作ることができ、従ｌ誓発泡プラスチック成形体ｔ−
製造する場合にプラスチックの架橋や７レオンガスｔ−
溶融プラスチック中に導入しプラスチックを発泡させる
などの比較的むづかしい方法によらなくて％吸水性樹脂
の分散さへ充分であれば、為発停とすることかできん本
発明で使用される吸水性樹脂＃／ｃに次のようなｔのが
Ｔｏりいづれｂｆ用できる。According to the present invention, the optimum viscosity f of the plastic to obtain the required foamed form can be determined by controlling the temperature gILt - % [1 m of foamed form IIIt
- It can be made into a foamed plastic molded product.
When manufacturing plastic cross-linking and 7 Leon gas t-
The water-absorbing resin used in the present invention can be used as long as the dispersion of the water-absorbing resin is sufficient without using a relatively difficult method such as introducing the water-absorbing resin into a molten plastic and foaming the plastic. The following t in #/c can be used for Toreader bf.
澱粉系としてはアクリロニトリルグラフト化加水分解物
、アクリル酸グラフト化合物、セルロー、ス糸としては
グラフトｉｌｔ合物、カルｌキシメチル化物、合成樹脂
系としてはポリアクリル酸塩系、ポリビニルアルコール
系、ポリエチレンオキサイド糸、インブチレン・無水ｉ
レイン瞭共１合−塩系。Starch-based materials include acrylonitrile-grafted hydrolysates, acrylic acid graft compounds, and cellulose; threads include grafted ilt compounds and cal-oxymethylated products; synthetic resin-based products include polyacrylate-based, polyvinyl alcohol-based, and polyethylene oxide threads. , inbutylene anhydrous i
Rain and light combination 1-salt system.
次に本発明の夾ｍガについて述べる。Next, the trap mode of the present invention will be described.
？ｌｌ １． ポリエチレン１００１量部と、吸水性
樹脂の澱粉系のアクリル酸グラフト化合物３０１量琳と
會１８０℃で混練押出成形後１００℃のＷ！閉谷器円で
過熱水蒸艶中に曝して。? ll 1. 1001 parts of polyethylene and 301 parts of starch-based acrylic acid graft compound of water-absorbent resin were kneaded at 180°C, extruded and then heated at 100°C. Exposure to superheated steam in a closed chamber.
成形体中に分散場れている吸水性樹脂に充分含水させる
。この間およそ６分間でおる。The water-absorbing resin dispersed in the molded body is sufficiently hydrated. This will last approximately 6 minutes.
このようにしたものを−たん冷却後１４０℃に７Ｊｌｌ
ｌ熱された空気浴中におよそｌＯ分間曝して吸水樹脂中
の水分ｔ′＃発気化発泡さゼることにより発泡率９０％
の発泡ポリエチレン押出成形体會得た。After cooling the product in this way, it was heated to 140°C for 7 Jll.
The foaming rate is 90% by exposing the water in the water-absorbing resin to a heated air bath for approximately 10 minutes to aerate and foam.
A foamed polyethylene extrusion molded body was obtained.
例２ ポリプロピレン１００重量部と吸水性樹脂として
セル冒−ス本のグラフト重合−３０重量部とに％練し、
厚さ２■の７１ル五にカレンダー用工した。ついで約１
ｏ分間密閉容器内で１００’ＣＫ加熱された水蒸気中に
曝し、フィルム中に分散されて−る吸水性樹脂に充分含
水さ４ｔた。これ會−たん冷却した畿１８０℃に加熱さ
れた空気浴中にｐよそｌＯ分間曝して吸水性樹脂中の水
分を蒸発気化発泡させることによって発泡率８５Ｘ（Ｄ
発泡ポリプロピレンフィルムを得た。Example 2 100 parts by weight of polypropylene and 30 parts by weight of graft polymerization of cellulose as a water-absorbing resin were kneaded,
Calendering was carried out on a 71cm thick sheet of 2cm thick. Then about 1
The film was exposed to water vapor heated to 100°C in a closed container for 100 minutes, so that the water-absorbing resin dispersed in the film was sufficiently hydrated by 4 tons. The foaming rate was 85X (D
A foamed polypropylene film was obtained.
以上の如く本発明によると′＃ｉは、水を発泡剤として
使用し、発泡プラスチックｔＶ利ｅｃＩ！！造すること
ができるｔのである。As described above, according to the present invention, '#i is a foamed plastic tVecI! using water as a foaming agent. ! It is possible to create.
出 ｍ 人 藤倉電線株式会社Output Fujikura Electric Wire Co., Ltd.
Claims (1)
の混練成形温Ｉ［Ｙｔ有するプラスチック中に配合混練
した後所定の成形【行ない、ついで成形体を水蒸気処理
して吸水性樹脂に水分【吸収させた後、更に＋１００℃
以上に加熱して吸水性樹脂に吸収されている水分を蒸気
気化せしめることを特徴とする発泡プラスチックの製造
方法。[Claims] A water-absorbent resin [p below the decomposition temperature of the resin and a kneading and forming temperature I [Yt] above 100° C. is mixed and kneaded into a plastic, followed by predetermined molding, and then the molded body is treated with steam. After the water is absorbed into the water-absorbing resin, the water is further heated to +100°C.
A method for producing foamed plastic, which comprises heating to the above temperature to vaporize water absorbed in a water-absorbing resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56160789A JPS5862024A (en) | 1981-10-08 | 1981-10-08 | Manufacture of foamed plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56160789A JPS5862024A (en) | 1981-10-08 | 1981-10-08 | Manufacture of foamed plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5862024A true JPS5862024A (en) | 1983-04-13 |
Family
ID=15722482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56160789A Pending JPS5862024A (en) | 1981-10-08 | 1981-10-08 | Manufacture of foamed plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5862024A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0410588U (en) * | 1990-05-10 | 1992-01-29 | ||
| WO1997038048A1 (en) * | 1996-04-05 | 1997-10-16 | Kaneka Corporation | Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded moldings |
| US6607682B1 (en) | 1998-07-30 | 2003-08-19 | Kaneka Corporation | Pre-expanded polypropylene resin beads and process for producing molded object therefrom by in-mold foaming |
| US6770682B2 (en) | 1999-12-28 | 2004-08-03 | Kaneka Corporation | Expandable styrene resin beads and foams produced therefrom |
| US8722137B2 (en) | 2008-02-29 | 2014-05-13 | Hitachi Metals, Ltd. | Hydrated water-absorption polymer containing resin composition, porous body and insulated wire using same, method of making the wire and coaxial cable |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57170725A (en) * | 1981-04-16 | 1982-10-21 | Japan Styrene Paper Co Ltd | Manufacture of foamed molding |
-
1981
- 1981-10-08 JP JP56160789A patent/JPS5862024A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57170725A (en) * | 1981-04-16 | 1982-10-21 | Japan Styrene Paper Co Ltd | Manufacture of foamed molding |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0410588U (en) * | 1990-05-10 | 1992-01-29 | ||
| WO1997038048A1 (en) * | 1996-04-05 | 1997-10-16 | Kaneka Corporation | Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded moldings |
| US6596782B1 (en) | 1996-04-05 | 2003-07-22 | Kaneka Corporation | Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded molding |
| US6607682B1 (en) | 1998-07-30 | 2003-08-19 | Kaneka Corporation | Pre-expanded polypropylene resin beads and process for producing molded object therefrom by in-mold foaming |
| US6770682B2 (en) | 1999-12-28 | 2004-08-03 | Kaneka Corporation | Expandable styrene resin beads and foams produced therefrom |
| US8722137B2 (en) | 2008-02-29 | 2014-05-13 | Hitachi Metals, Ltd. | Hydrated water-absorption polymer containing resin composition, porous body and insulated wire using same, method of making the wire and coaxial cable |
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