JPH0242063B2 - - Google Patents
Info
- Publication number
- JPH0242063B2 JPH0242063B2 JP7889783A JP7889783A JPH0242063B2 JP H0242063 B2 JPH0242063 B2 JP H0242063B2 JP 7889783 A JP7889783 A JP 7889783A JP 7889783 A JP7889783 A JP 7889783A JP H0242063 B2 JPH0242063 B2 JP H0242063B2
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- vinyl acetate
- outer layer
- weight
- layer
- 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
Links
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 3
- 239000004711 α-olefin Substances 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000000155 melt Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は外層が柔軟であつてべたつきがなく且
つ全体として剛性を保持して軽量な多層中空成形
品に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer hollow molded product whose outer layer is flexible and non-sticky, and which maintains rigidity as a whole and is lightweight.
従来、各種椅子のアームレスト、ヘツドレスト
などの人体一部の載置部品は金属製又はプラスチ
ツク製の芯材と軟質塩化ビニル製の外皮の間に発
泡ウレタンが介在するものが多く見られるもの
の、製造工程が多く、重量もあり、コスト高であ
あるといつた問題があつた。 Conventionally, parts for placing parts of the human body, such as the armrests and headrests of various chairs, have often had urethane foam interposed between a metal or plastic core material and a soft vinyl chloride outer skin. The problem was that it was heavy, heavy, and expensive.
本発明はかかる事情に鑑み種々検討の結果到達
したものでありその要旨は、外層は、表面硬さ30
以下、酢酸ビニル含量10〜20重量％のエチレン―
酢酸ビニル共重合体とエチレン―αオレフイン共
重合エラストマーからなる組成物層であり、内層
は、スチフネス9000Kg／cm2以上、アイゾツト衝撃
値15Kg・cm／cm以上の合成樹脂層である積層体で
中空状に形成されてなることを特徴とする多層中
空成形品である。 The present invention was arrived at as a result of various studies in view of the above circumstances, and its gist is that the outer layer has a surface hardness of 30
Below, ethylene with a vinyl acetate content of 10 to 20% by weight
It is a composition layer made of a vinyl acetate copolymer and an ethylene-α-olefin copolymer elastomer, and the inner layer is a hollow laminate made of a synthetic resin layer with a stiffness of 9000 Kg/cm 2 or more and an Izod impact value of 15 Kg cm/cm or more. This is a multilayer hollow molded product characterized by being formed into a shape.
本発明の多層中空成形品の外層における表面硬
さ30以下とはASTM Ｄ―2240シヨアーＤによる
その値以下であつて柔軟な感触をもたらし、外層
はエチレン―酢酸ビニル共重合体とエチレン―α
オレフインエラストマーからなる組成物であつ
て、いづれか片方を欠くとべたつきを生じ使用上
支障となり勝ちとなり、エチレレン―酢酸ビニル
共重合体を40〜70重量％用いるのが好ましい。エ
チレン―酢酸ビニル共重合体の酢酸ビニル含量は
10〜20重量％であつて、10重量％未満では柔軟な
感触が得られず、20重量％を越えるとべたつきを
生ずる。またエチレン―αオレフイン共重合エラ
ストマーは、柔軟性をもたらすが、エチレン―プ
ロピレン共重合エラストマーがエチレン―酢酸ビ
ニル共重合体と相溶性が良いので好ましい。なお
組成物のメルトフローレート（JISK―6760）は
0.5〜1.5g／10minが中空成形を採用する際に好ま
しく、0.5g／10min未満では表面が粗となり、
1.5g／10minを越えると備肉を起し勝ちである。 The surface hardness of the outer layer of the multilayer hollow molded product of the present invention is 30 or less, which is less than the value determined by ASTM D-2240 Shore D, and provides a soft feel.
It is a composition consisting of an olefin elastomer, and if either one of them is missing, it will tend to become sticky and cause trouble in use, so it is preferable to use ethylene-vinyl acetate copolymer in an amount of 40 to 70% by weight. The vinyl acetate content of ethylene-vinyl acetate copolymer is
The amount is 10 to 20% by weight, and if it is less than 10% by weight, a soft feel cannot be obtained, and if it exceeds 20% by weight, it will become sticky. Ethylene-α-olefin copolymer elastomer provides flexibility, and ethylene-propylene copolymer elastomer is preferred because it has good compatibility with ethylene-vinyl acetate copolymer. The melt flow rate (JISK-6760) of the composition is
0.5 to 1.5g/10min is preferable when using blow molding; less than 0.5g/10min will result in a rough surface.
If it exceeds 1.5g/10min, the weight will increase and you will win.
また内層におけるスチフネス9000Kg／cm2以上と
はASTM Ｄ―747によるその値以上であり、こ
のことにより変形することのない腰の強さをもた
らし、さらにアイゾツト衝撃値15Kg・cm／cm以上
とはJIS規格によるその値以上であり、たとえば
高密度ポリエチレンならJIS K7110、ポリプロピ
レンならJIS 6758が適用され、このことにより通
常は破損することのない耐衝撃性をもたらし、そ
の合成樹脂としては高密度ポリエチレン、ポリプ
ロピレンなどが挙げられ、なかでは耐衝撃性に優
れ中空成形の際にバリの除去し易い高密度ポリエ
チレンが好ましい。なお合成樹脂のメルトフロー
レートは0.1〜1.5g／10minが中空成形を採用する
際に好ましく、0.1g／10min未満では押出量が低
下し、1.5g／10minを越えると偏肉を起し勝ちで
ある。 In addition, the stiffness of the inner layer is 9000 kg/cm 2 or more, which is higher than the value according to ASTM D-747, which provides the strength of the waist without deformation. For example, JIS K7110 is applied for high-density polyethylene, and JIS 6758 is applied for polypropylene. This provides impact resistance that does not normally cause damage, and the synthetic resin is high-density polyethylene, polypropylene. Among them, high-density polyethylene is preferred because it has excellent impact resistance and burrs can be easily removed during blow molding. The melt flow rate of the synthetic resin is preferably 0.1 to 1.5 g/10 min when using blow molding. If it is less than 0.1 g/10 min, the extrusion rate will decrease, and if it exceeds 1.5 g/10 min, uneven thickness will likely occur. be.
本発明の多層中空成形品は中空状に形成されて
いるが、この形状は多層中空成形を採用すると好
適であり、中空状なるが故に軽量でありさらに内
外層の断熱性は勿論中空状なるが故の断熱性も有
する。なお内外層の接着が不足するならば接着性
樹脂としてたとえば不飽和カルボン酸またはその
誘導体をグラフトした変性ポリオレフイン樹脂を
中間層として共押出するとよい。 The multilayer hollow molded product of the present invention is formed in a hollow shape, but this shape is suitable for adopting multilayer hollow molding, and because it is hollow, it is lightweight, and the insulation of the inner and outer layers is of course improved, but the hollow shape Therefore, it also has insulation properties. If adhesion between the inner and outer layers is insufficient, a modified polyolefin resin grafted with an unsaturated carboxylic acid or a derivative thereof as an adhesive resin may be coextruded as an intermediate layer.
本発明の多層中空成形品は各種椅子のアームレ
スト、ヘツドレストなどに使用でき、外層が柔軟
であつて且つ全体として剛性を保持していて、中
空状に形成されているため軽量であり断熱性も有
する。 The multilayer hollow molded product of the present invention can be used for armrests, headrests, etc. of various chairs.The outer layer is flexible and maintains rigidity as a whole, and because it is formed in a hollow shape, it is lightweight and has heat insulation properties. .
以下に実施例を挙げて本発明をさらに詳細に説
明する。 The present invention will be explained in more detail with reference to Examples below.
実施例 １
外層として表面硬さ28、メルトフローレート
1g／10minの、エチレン酢酸ビニル共重合体（酢
酸ビニル含有量15重量％、メルトフローインデツ
クス2g／10min―JIS K6730）60重量％、エチレ
ン―プロピレン共重合エラストマー（商品名；タ
フマーＰ―0680、メルトフローレート0.44g／
10min―JIS K6730）40重量％の組成物を用い、
内層としてスチフネス11000Kg／cm2の高密度ポリ
エチレン（密度0.950g／cm3、メルトフローインデ
ツクス0.3g／10min―JIS K6760）を用い、多層
中空成形法により外層２mm厚、内層２mm厚、全体
寸法として略々タテ８cm×ヨコ38cm×厚み５cmの
中空状のアームレストを成形した。Example 1 Surface hardness 28 as outer layer, melt flow rate
1g/10min, ethylene-vinyl acetate copolymer (vinyl acetate content 15% by weight, melt flow index 2g/10min-JIS K6730) 60% by weight, ethylene-propylene copolymer elastomer (trade name: Tafmer P-0680, Melt flow rate 0.44g/
10min-JIS K6730) using a composition of 40% by weight,
High-density polyethylene with a stiffness of 11000 kg/cm 2 (density 0.950 g/cm 3 , melt flow index 0.3 g/10 min - JIS K6760) is used as the inner layer, and the outer layer is 2 mm thick, the inner layer is 2 mm thick, and the overall dimensions are as follows: A hollow armrest approximately 8 cm long x 38 cm wide x 5 cm thick was molded.
得られたアームレストは外層の感触が柔軟であ
りべたつきがなく実験者が精一杯握りしめても変
形しなかつた。 The outer layer of the resulting armrest had a soft feel and was not sticky, and did not deform even when the experimenter squeezed it as hard as he could.
実施例 ２
外層として実施例１と同じ組成物を用い、内層
としてスチフネス10000Kg／cm2のポリプロピレン
（密度0.900g／cm3、メルトフローインデツクス
0.8g／10min―JIS K6758）を用い、多層中空成
形法により外層２mm厚、内層２mm厚、全体寸法と
してタテ13cm、ヨコ25cm、厚さ10cmの中空状のヘ
ツドレストを成形した。Example 2 The same composition as in Example 1 was used as the outer layer, and polypropylene with a stiffness of 10000 Kg/cm 2 (density 0.900 g/cm 3 , melt flow index) was used as the inner layer.
A hollow headrest with an outer layer of 2 mm thickness, an inner layer of 2 mm thickness, and an overall dimension of 13 cm in height, 25 cm in width, and 10 cm in thickness was molded using a multilayer hollow molding method using a material (0.8 g/10 min - JIS K6758).
得られたヘツドレストは外層の感触が柔軟であ
りベタツキがなく実験者の腕で精一杯の変形を試
みたが何度変形は認められなかつた。 The outer layer of the resulting headrest had a soft feel and was not sticky, and no matter how many times the experimenter tried to deform it with his arm, no deformation was observed.
比較例 １
外層として実施例１のエチレン―酢酸ビニル共
重合体（表面硬さ35）を用いた他は実施例１と同
様に行なつたところ、得られたアームレストは外
層の感触が硬くべたつきが認められた。Comparative Example 1 The same procedure as in Example 1 was carried out except that the ethylene-vinyl acetate copolymer of Example 1 (surface hardness: 35) was used as the outer layer. Admitted.
Claims (1)
〜20重量％のエチレン―酢酸ビニル共重合体とエ
チレン―αオレフイン共重合エラストマーからな
る組成物層であり、内層は、スチフネス9000Kg／
cm2以上、アイゾツト衝撃値15Kg・cm／cm以上の合
成樹脂層である積層体で中空状に形成されてなる
ことを特徴とする多層中空成形品。1 The outer layer has a surface hardness of 30 or less and a vinyl acetate content of 10.
It is a composition layer consisting of ~20% by weight of ethylene-vinyl acetate copolymer and ethylene-α-olefin copolymer elastomer, and the inner layer has a stiffness of 9000 kg/
A multilayer hollow molded product characterized in that it is formed into a hollow shape with a laminate of synthetic resin layers with an Izot impact value of 15 kg/cm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7889783A JPS59204551A (en) | 1983-05-07 | 1983-05-07 | Multilayer hollow shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7889783A JPS59204551A (en) | 1983-05-07 | 1983-05-07 | Multilayer hollow shape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59204551A JPS59204551A (en) | 1984-11-19 |
| JPH0242063B2 true JPH0242063B2 (en) | 1990-09-20 |
Family
ID=13674604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7889783A Granted JPS59204551A (en) | 1983-05-07 | 1983-05-07 | Multilayer hollow shape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59204551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268906A (en) * | 2006-03-31 | 2007-10-18 | Mirai Ind Co Ltd | Synthetic resin corrugated tube |
-
1983
- 1983-05-07 JP JP7889783A patent/JPS59204551A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268906A (en) * | 2006-03-31 | 2007-10-18 | Mirai Ind Co Ltd | Synthetic resin corrugated tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59204551A (en) | 1984-11-19 |
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