Claims
- 1. A heat seal material having a plurality of resin surfaces which are positioned face to face and can be heat-fused together and, thereafter, is easily openable, one of the resin surfaces being formed of a resin composition comprising
- (A) 45 to 65% by weight of high-pressure-polymerized low density ethylene homopolymer or linear low-density copolymer of ethylene and C.sub.2 -C.sub.10 alpha-olefin, having a density of 0.91 to 0.94 g/cm.sup.3, a crystallinity of more than 40% and a melt flow rate of 1 to 10 g/10 min,
- (B) 15 to 25% by weight of polypropylene having a melt flow rate of 3 to 10 g/10 min, and
- (C) 20 to 30% by weight of a low-crystalline or substantially amorphous ethylene/alpha-olefin copolymer having an ethylene content of 85 to 93 mole % and a melt flow rate of 1 to 5 g/10 min,
- and a second heat seal surface formed of a different resin composition comprising polypropylene.
- 2. The heat seal material of claim 1 in which the ethylene/alpha-olefin copolymer has a crystallinity of not more than 40%.
- 3. An easily openable simple packaging material having the heat seal material of claim 1.
- 4. The heat seal material of claim 1 wherein the resin composition further comprises at least one additive selected from heat stabilizers, weatherability stabilizers, anti-static agents, anti-haze agents, anti-blocking agents, slip agents, lubricants, pigments, dyes and nucleating agents.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-317191 |
Dec 1987 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/281,341, filed Dec. 8, 1988, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4499241 |
Yoshimura et al. |
Feb 1985 |
|
4859514 |
Friedrich et al. |
Aug 1989 |
|
Foreign Referenced Citations (6)
Number |
Date |
Country |
0144642 |
Jun 1985 |
EPX |
0196727 |
Oct 1986 |
EPX |
253792 |
Jan 1988 |
EPX |
2956402 |
Oct 1987 |
FRX |
57-174329 |
Oct 1982 |
JPX |
58-209550 |
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JPX |
Non-Patent Literature Citations (1)
Entry |
Boenig-"Polyolefins" Nov. 1986 p. 81. |
Continuations (1)
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Number |
Date |
Country |
Parent |
281341 |
Dec 1988 |
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