Olefin resin-based articles having gas barrier properties

• US 5,422,185 A
• Filed: 04/05/1993
• Issued: 06/06/1995
• Est. Priority Date: 04/14/1992
• Status: Expired due to Term

• Current Assignee: Mitsubishi Petrochemical Co., Ltd. (Mitsubishi Chemical Group Corp.)
• Original Assignee: Mitsubishi Petrochemical Co., Ltd. (Mitsubishi Chemical Group Corp.)
• Inventors: Nakano, Tomomi, Egami, Masayuki, Mayumi, Junji
• Primary Examiner(s): Buffalow, Edith
• Application Number:
  US08/042,583
• Time in Patent Office: 792 Days
• Field of Search: 428/516, 428/517, 428/483, 428/421, 428/412, 428/476.3, 428/477.7, 428/474.4, 428/520, 428/458, 428/461
• US Class Current: 428/412
• CPC Class Codes: C08J 2323/02 not modified by chemical after treatment
• CPC Class Codes: C08J 7/0423 with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• CPC Class Codes: C08J 7/048 Forming gas barrier coatings
• CPC Class Codes: C08J 7/123 Treatment by wave energy or particle radiation C08J7/18 takes precedence
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 23/14 Copolymers of propene C08L23/16 takes precedence
• CPC Class Codes: C08L 23/145 Copolymers of propene with monomers having more than one C=C double bond
• CPC Class Codes: C23C 16/402 Silicon dioxide
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31725 Of polyamide
• CPC Class Codes: Y10T 428/3175 Next to addition polymer from unsaturated monomer[s]
• CPC Class Codes: Y10T 428/31765 Inorganic-containing or next to inorganic-containing
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31917 Next to polyene polymer
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer

Abstract

An olefin resin-based article having gas barrier properties, comprising a crystalline olefin copolymer having an inorganic oxide thin film layer formed thereon where the crystalline olefin copolymer comprises ethylene or an α-olefin having from 3 to 12 carbon atoms and a diene and having a diene unit content of from 0.05 to 20 mol %, wherein the article suffers from no reduction in gas barrier properties even when heat or stress is applied during fabrication or use and is useful as a wrapping or packaging material for making pouch-packed foods or IC packages.

Claims

1. An olefin resin-based article having good gas barrier properties, comprising:

a crystalline olefin copolymer having formed thereon an inorganic metal oxide thin layer formed by plasma deposition, wherein said inorganic metal oxide thin layer has a thickness from 200 to 4,000 Å and

wherein said inorganic metal oxide is SiO₂, wherein said crystalline olefin copolymer comprises repeat units obtained from ethylene or an α

-olefin having 3 to 13 carbon atoms; and

from 0.05 to 20 mol % of a diene.

2. The olefin resin-based article as claimed in claim 1, wherein said crystalline olefin copolymer has modulus of elasticity of from 800 to 45,000 kg/cm².

3. The olefin resin-based article as claimed in claim 1, wherein said crystalline olefin copolymer has a melt flow rate of from 0.01 to 100 g/10 min.

4. The olefin resin-based article as claimed in claim 1, wherein said crystalline olefin copolymer contains from 1×

10^-4 to 2×

10^-2 carbon-to-carbon double bonds per 100 g.

5. The olefin resin-based article as claimed in claim 1, wherein said crystalline olefin copolymer has a crystallinity of from 20 to 70%.

6. The olefin resin-based article as claimed in claim 1, wherein said α

-olefin is propylene, and said diene is an acyclic, non-conjugated diene represented by formula ##STR2## wherein n is a number form 1 to 10, and R¹, R², and R³ each, independently, represents hydrogen, or an alkyl group having from 1 to 8 carbon atoms.

7. The olefin resin-based article as claimed in claim 6, wherein said diene is selected from the group consisting of 1,4-hexadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4hexadiene, 6-methyl-1,6-octadiene, 7-methyl-1,6-octadiene 1,9-octadiene, and 1,13-tetradecadiene.

8. The olefin resin-based article as claimed in claim 6, wherein said diene is selected from the group consisting of 1,9-octadiene and 1,13-tetradecadiene.

9. The olefin resin-based article as claimed in claim 1, wherein the article is a biaxially stretched film having a thickness of from 5 to 200 μ

m, and said inorganic oxide thin layer is SiO₂, having a thickness of from 200 to 4,000 Å

.

10. The olefin resin-based article as claimed in claim 1, further comprising a layer of a thermoplastic resin laminated to said inorganic oxide layer or laminated to said crystalline olefin copolymer.

11. The olefin resin-based article as claimed in claim 10 wherein said thermoplastic resin is a member selected from the group consisting of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyamide, polybutylene terephthalate, polyethylene terephthalate, polyphenylene sulfide, polyphenylene ether, polycarbonate, polyvinylidene chloride, polyvinylidene fluoride and polyethylvinyl alcohol.