JPH0671738B2 - Compression processing method for thermoplastic resin foams - Google Patents
Compression processing method for thermoplastic resin foamsInfo
- Publication number
- JPH0671738B2 JPH0671738B2 JP61006521A JP652186A JPH0671738B2 JP H0671738 B2 JPH0671738 B2 JP H0671738B2 JP 61006521 A JP61006521 A JP 61006521A JP 652186 A JP652186 A JP 652186A JP H0671738 B2 JPH0671738 B2 JP H0671738B2
- Authority
- JP
- Japan
- Prior art keywords
- foam
- thermoplastic resin
- roll
- compression processing
- processing method
- 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 - Lifetime
Links
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、厚さを薄くして柔軟にすると共に、その表面
を平滑にする独立気泡を有するシート状の熱可塑性樹脂
発泡体を圧縮加工法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention compresses a sheet-shaped thermoplastic resin foam having closed cells to make the surface thin and flexible and to make the surface smooth. Concerning the law.
ロールを使用して独立気泡を有する熱可塑性樹脂発泡体
の厚さを薄くし、その表面を平滑化する圧縮加工法は公
知である。A compression processing method is known in which a thermoplastic resin foam having closed cells is made thin using a roll and the surface thereof is smoothed.
たとえば、特公昭47−19875号公報には、軟化点付近に
加熱された熱可塑性樹脂発泡体の少なくとも１表面に紙
を当て密着させた状態で、圧縮加工する方法が提案され
ている。しかし、この方法は、紙を必要とし、圧縮加工
した発泡体の表面から紙を取り除かねばならないため加
工が煩雑であった。また、厚さを薄くするため発泡体を
強く圧縮すると、厚さムラを生じ易くしたり、加工後の
紙の剥離を難しくして表面を損傷したりするため、十分
に厚さを薄くし、柔軟なものにすることが困難であっ
た。For example, Japanese Patent Publication No. 47 (1987) -19875 proposes a method in which at least one surface of a thermoplastic resin foam heated near the softening point is pressed against paper and compressed, and then compressed. However, this method requires paper, and the paper has to be removed from the surface of the foamed body that has been subjected to compression processing, so that the processing is complicated. Further, if the foam is strongly compressed to reduce the thickness, uneven thickness is likely to occur, or the surface of the paper may be damaged due to the difficulty of peeling the paper after processing. It was difficult to make it flexible.
本発明の目的は、独立気泡を有する架橋された熱可塑性
発泡体をロールで直接圧縮し、その厚さを薄くするに際
して、ロール表面への接着や厚さムラを発生させること
なく圧縮し、厚さが薄くて柔軟な、しかも表面が平滑な
独立気泡を有する熱可塑性樹脂発泡体の圧縮加工法を提
供することにある。An object of the present invention is to directly compress a crosslinked thermoplastic foam having closed cells with a roll and, when thinning the thickness, compress without causing adhesion to the roll surface or uneven thickness, Another object of the present invention is to provide a compression processing method for a thermoplastic resin foam having thin and flexible closed cells having a smooth surface.
このような本発明の目的は、独立気泡を有するシート状
の熱可塑性樹脂発泡体を圧縮加工するに際して、前記熱
可塑性発泡体を架橋した後、加熱して軟化させ、しか
も、その長さ方向に1.05〜1.5倍に延伸させた状態で表
面に50〜500メッシュの梨地状の凹凸を形成した冷却ロ
ールを用いて圧縮加工することにより達成することがで
きる。Such an object of the present invention is to subject the sheet-like thermoplastic resin foam having closed cells to compression processing, after crosslinking the thermoplastic foam, to heat and soften it, and further in the length direction thereof. This can be achieved by performing compression processing using a cooling roll having a surface formed with satin-like irregularities of 50 to 500 mesh in a state of being stretched 1.05 to 1.5 times.
本発明によれば、独立気泡を有する熱可塑性樹脂発泡体
を架橋後、加熱して軟化せしめ、その長さ方向に特定の
倍率で延伸することにより、独立気泡の形態を確保しな
がら強く均一に圧縮して厚さを薄くすることができる。
また、冷却ロールの表面を特定のメッシュの梨地状凹凸
にすることにより、発泡体のロール表面への接着を抑制
して剥離を容易にし、表面を平滑にすることができる。According to the present invention, a thermoplastic resin foam having closed cells is cross-linked, heated to be softened, and stretched at a specific ratio in the length direction thereof to strongly and uniformly maintain the shape of closed cells. It can be compressed to reduce its thickness.
Further, by making the surface of the cooling roll into a matte texture of a specific mesh, it is possible to suppress the adhesion of the foam to the roll surface, facilitate peeling, and make the surface smooth.
本発明に使用する独立気泡を有する熱可塑性樹脂発泡体
を構成する樹脂としては、ポリエチレン，エチレン−酢
酸ビニル共重合体、塩素化ポリエチレン，ポリプロピレ
ン，ポリブタジエン，エチレン−アクリル酸エチル共重
合体，エチレン−プロピレン共重合体及びこれらのポリ
マーの少なくとも２種類以上のポリマーブレンド等があ
る。また、発泡体としては発泡倍率が３〜40倍，厚さが
0.5〜3.0mmのものを使用することが好ましい。As the resin constituting the thermoplastic resin foam having closed cells used in the present invention, polyethylene, ethylene-vinyl acetate copolymer, chlorinated polyethylene, polypropylene, polybutadiene, ethylene-ethyl acrylate copolymer, ethylene- There are propylene copolymers and polymer blends of at least two types of these polymers. The foam has a foaming ratio of 3 to 40 times and a thickness of
It is preferable to use one having a thickness of 0.5 to 3.0 mm.
このような発泡体は圧縮に先立って電子線架橋法や化学
架橋法により架橋される。この架橋により、軟化点以上
の温度に加熱し、軟化させた状態で圧縮しても独立気泡
の形態を保有させることができる。Such a foam is crosslinked by an electron beam crosslinking method or a chemical crosslinking method prior to compression. By this cross-linking, the form of closed cells can be retained even if the material is heated to a temperature above the softening point and compressed in the softened state.
次いで、予め架橋後、加熱軟化させた発泡体は、この厚
さが薄くなるように、その長さ方向に1.05〜1.50倍に延
伸した状態で圧縮される。しかも、発泡体中の独立気泡
の断面形状を円形から偏平形状に変化させ、かつ偏平化
した気泡が発泡体平面に沿って平行になるように配列さ
せることができるため、独立気泡を有する発泡体の特性
を損なうことなく柔軟性を向上させることができる。Next, the foam that has been crosslinked in advance and softened by heating is compressed in a state of being stretched 1.05 to 1.50 times in its length direction so that the thickness becomes thin. Moreover, since the cross-sectional shape of the closed cells in the foam can be changed from a circular shape to a flat shape, and the flattened cells can be arranged so as to be parallel to the foam plane, the foam having the closed cells The flexibility can be improved without impairing the characteristics of.
本発明には、表面に50〜500メッシュの梨地状の凹凸を
形成したロールを使用する。好ましくは100〜300メッシ
ュの水冷却機構を備えたロールを使用する。このロール
表面の梨地状凹凸を50メッシュ以上にすることにより、
発泡体表面の良好な平滑性を確保することができる。ま
た、500メッシュ以下にすることにより、ロール表面へ
の発泡体の接着を抑制し、剥離を容易にすることができ
る。In the present invention, a roll having 50-500 mesh satin-finished concavities and convexities formed on its surface is used. A roll provided with a water cooling mechanism of 100 to 300 mesh is preferably used. By making the satin-like irregularities on the surface of this roll 50 mesh or more,
Good smoothness of the foam surface can be ensured. Further, when the mesh is 500 mesh or less, the adhesion of the foam to the roll surface can be suppressed and the peeling can be facilitated.
上記冷却ロールの表面は熱可塑性樹脂の軟化点により相
違するが、５〜40℃の温度になるように冷却する。この
ように冷却することにより、ロールと発泡体の融着を防
止し、発泡体を剥離し易くすると共に、表面を平滑にす
ることができる。The surface of the cooling roll is cooled to a temperature of 5 to 40 ° C., though it depends on the softening point of the thermoplastic resin. By cooling in this way, it is possible to prevent fusion between the roll and the foam, facilitate peeling of the foam, and smooth the surface.
実施例１ 18重量％の酢酸ビニルを含有するエチレン−酢酸ビニル
共重合体を電子線照射架橋した，見掛け密度0.17g/cm3,
厚さ1.70mmの独立気泡を有する発泡体を、遠赤外線ラン
プで80〜100℃に加熱し、後述の冷却圧縮ロールで圧縮
される前の発泡体表面に300℃の熱風を吹き付けて軟化
せしめ、この発泡体を回転速度比が1.0〜1.3の供給ロー
ルと冷却圧縮ロールとの間に供給し、3.5kg/cm2の圧力
で圧縮加工した。冷却圧縮ロールとしては、表面の梨地
状凹凸が100メッシュで温度が20℃のものを使用した。Example 1 Electron beam irradiation cross-linking of ethylene-vinyl acetate copolymer containing 18% by weight of vinyl acetate, apparent density 0.17 g / cm 3 ,
A foam having closed cells with a thickness of 1.70 mm is heated to 80 to 100 ° C. with a far-infrared lamp, and softened by blowing hot air of 300 ° C. onto the foam surface before being compressed by a cooling compression roll described later, This foam was supplied between a supply roll having a rotation speed ratio of 1.0 to 1.3 and a cooling compression roll, and compression-processed at a pressure of 3.5 kg / cm 2 . As the cooling and compressing roll, one having a 100-mesh surface textured surface and a temperature of 20 ° C. was used.
この圧縮加工により発泡体は、1.2mmの厚さに圧縮され
ると共に、その表面が30〜40℃に冷却され、剥離が容易
で残留歪みの発生は認められなかった。得られた発泡体
は、表面が平滑で、しかも、気泡の断面形状が円形から
偏平に変化し、柔軟性が著しく向上していた。By this compression processing, the foam was compressed to a thickness of 1.2 mm and the surface was cooled to 30 to 40 ° C., so that peeling was easy and no residual strain was observed. The obtained foam had a smooth surface and the cross-sectional shape of the cells changed from circular to flat, and the flexibility was remarkably improved.
比較例１ 梨地状凹凸の大きさを、それぞれ45メッシュにした冷却
圧縮ロールを使用した以外は、実施例１と同様にして圧
縮加工を行った。Comparative Example 1 A compression process was carried out in the same manner as in Example 1 except that the cooling and compressing rolls each having the size of the matte textured unevenness of 45 mesh were used.
得られた発泡体は1.2mmの厚さに圧縮されていたが、表
面が凹凸化して平滑にすることができなかった。The obtained foam was compressed to a thickness of 1.2 mm, but the surface was uneven and could not be smoothed.
比較例２ 梨地状凹凸の大きさを、それぞれ550メッシュにした冷
却圧縮ロールを使用した以外は、実施例１と同様にして
圧縮加工を行ったが、ロール表面に発泡体が接着し、表
面の損傷を避けることが困難であった。Comparative Example 2 A compression process was performed in the same manner as in Example 1 except that the cooling and compressing rolls each having a satin-like unevenness size of 550 mesh were used, but the foam adhered to the roll surface, It was difficult to avoid damage.
比較例３ 遠赤外線ランプにより加熱及び熱風の吹き付けを行なわ
ず、軟化させなかった以外は、実施例１と同様にして圧
縮加工を行ったが、気泡の形状及び厚さに殆ど変化がな
かった。Comparative Example 3 Compression processing was performed in the same manner as in Example 1 except that heating and blowing of hot air with a far-infrared lamp were not performed and softening was performed, but there was almost no change in the shape and thickness of the bubbles.
実施例２ 10重量％の酢酸ビニルを含有するエチレン−酢酸ビニル
共重合体を電子線照射架橋した，見掛け密度0.14g/cm3,
厚さ0.70mmの独立気泡を有する発泡体を、遠赤外線ラン
プで100〜120℃に加熱し、後述の冷却圧縮ロールで圧縮
される前の発泡体表面に250℃の熱風を吹き付けて軟化
せしめ、この発泡体を回転速度比が1.0〜1.2の供給ロー
ルと表面に300メッシュの梨地状凹凸を形成した冷却圧
縮ロールとの間に供給し、3.5kg/cm2の圧力で圧縮加工
した。Example 2 An ethylene-vinyl acetate copolymer containing 10% by weight of vinyl acetate was cross-linked by electron beam irradiation, and an apparent density of 0.14 g / cm 3 ,
A foam having 0.70 mm thickness of closed cells is heated to 100 to 120 ° C. with a far infrared lamp, and softened by blowing hot air of 250 ° C. onto the foam surface before being compressed by a cooling compression roll described later, This foam was supplied between a supply roll having a rotation speed ratio of 1.0 to 1.2 and a cooling compression roll having a 300 mesh satin-textured surface, and compression-processed at a pressure of 3.5 kg / cm 2 .
冷却圧縮ロールを通過した発泡体は、0.4mmの厚さに圧
縮されると共に、その表面温度は30〜40℃に冷却され、
残留歪みのない柔軟で平滑なものになっていた。また、
この発泡体の気泡の断面形状は、円形が偏平形状に変化
していた。The foam that has passed through the cooling compression roll is compressed to a thickness of 0.4 mm, and its surface temperature is cooled to 30 to 40 ° C.
It was soft and smooth without residual distortion. Also,
The cross-sectional shape of the cells of this foam changed from a circular shape to a flat shape.
フロントページの続き (72)発明者 小林 英雄 滋賀県大津市園山１丁目１番１号 東レ株 式会社滋賀事業場内 (72)発明者 若村 宣雄 滋賀県大津市園山１丁目１番１号 東レ株 式会社滋賀事業場内 (56)参考文献 特開 昭49−2874（ＪＰ，Ａ) 特公 昭47−19875（ＪＰ，Ｂ２)Front page continued (72) Inventor Hideo Kobayashi 1-1-1, Sonoyama, Otsu City, Shiga Prefecture Toray Co., Ltd. Shiga Plant (72) Inventor Nobuo Wakamura 1-1-1, Sonoyama, Shiga Prefecture Toray Co., Ltd. Company Shiga Plant (56) References Japanese Patent Publication No. Sho 49-2874 (JP, A) Japanese Patent Publication No. Sho 47-19875 (JP, B2)
Claims (1)
発泡体を圧縮加工するに際して、前記熱可塑性発泡体を
架橋した後、加熱して軟化させ、かつ、その長さ方向に
1.05〜1.5倍に延伸させた状態で表面に50〜500メッシュ
の梨地状の凹凸を形成した冷却ロールを用いて圧縮加工
することを特徴とする熱可塑性樹脂発泡体の圧縮加工
法。1. When compressing a sheet-shaped thermoplastic resin foam having closed cells, the thermoplastic foam is crosslinked and then heated to be softened, and in the lengthwise direction thereof.
A compression processing method for a thermoplastic resin foam, which comprises performing compression processing using a cooling roll having a surface in the form of satin-finished 50-500 mesh in a stretched state of 1.05 to 1.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61006521A JPH0671738B2 (en) | 1986-01-17 | 1986-01-17 | Compression processing method for thermoplastic resin foams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61006521A JPH0671738B2 (en) | 1986-01-17 | 1986-01-17 | Compression processing method for thermoplastic resin foams |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62164514A JPS62164514A (en) | 1987-07-21 |
| JPH0671738B2 true JPH0671738B2 (en) | 1994-09-14 |
Family
ID=11640689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61006521A Expired - Lifetime JPH0671738B2 (en) | 1986-01-17 | 1986-01-17 | Compression processing method for thermoplastic resin foams |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0671738B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111194331B (en) * | 2017-10-11 | 2022-07-22 | 东丽株式会社 | Polyolefin resin foam, process for producing the same, and adhesive tape |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS492874A (en) * | 1972-04-22 | 1974-01-11 |
-
1986
- 1986-01-17 JP JP61006521A patent/JPH0671738B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62164514A (en) | 1987-07-21 |
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