US4719153A
Expired / Lapsed
US
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Laminated article and process for production thereof
Assignee: Kuraray Co Ltd
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Filing: 1985-11-12
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Granted: 1988-01-12
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Expires: 2005-11-12
Abstract
Abstract A laminated article which comprises a layer (A) of a saponified ethylene--vinyl acetate copolymer resin having an ethylene content of 20-55% by mole and a degree of saponification of not less than 90% by mole; laminated with a layer (B) of a hydrophobic thermoplastic resin; through the medium of a layer (C) of an adhesive resin; said adhesive resin contains a polymer (X) comprising ethylene component--vinyl acetate component--ethylenically unsaturated carboxylic acid component or anhydride thereof--styrene type vinyl compound component, and a copolymer (Y) comprising ethylene component--vinyl acetate component, in an amount satisfying specific formulae, and the process for production thereof, which has a remarkably excellent adhesion between layers, as well as excellent mechanical characteristics and gas barrier properties, and is adapted to a container for foods and packaging material.
Inventors
- 👤 Toshiyuki Akasawa
- 👤 Takuji Okaya
- 👤 Masamitsu Nakabayashi
- 👤 Yuzo Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:21
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/302; B32B27/304; B32B27/306; B32B27/36; B32B27/365; B32B7/00; B32B7/04; B32B7/12; C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0846; C09J123/0869; C09J131/00; C09J131/02; C09J131/04; B32B2307/00; B32B2307/70; B32B2307/73; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
229 words
A laminated article which comprises a layer (A) of a saponified ethylene-vinyl acetate copolymer resin having an ethylene content of 20-55 % by mole and a degree of saponification of not less than 90 % by mole; laminated with a layer (B) of a hydrophobic thermoplastic resin; through the medium of a layer (C) of an adhesive resin; said adhesive resin contains a polymer (X) comprising ethylene component-vinyl acetate component-ethylenically unsaturated carboxylic acid component or anhydride thereof-styrene type vinyl compound component, and a copolymer (Y) comprising ethylene component-vinyl acetate component, in an amount satisfying the following formulae (I), (II), (III), (IV) and (V) |V.sub.X -V.sub.Y |≦0.30 (I) 0.15≦V.sub.X ·W.sub.X +V.sub.Y ·W.sub.Y ≦0.45 (II) 0.01≦C.sub.X ·W.sub.X ≦1 (III) 1.0≦n·S.sub.X /C.sub.X ≦2.0 (IV) 0.1≦W.sub.X /W.sub.Y ≦10 (V) wherein, V X : content of vinyl acetate in the polymer (X) (weight fraction) V Y : content of vinyl acetate in the polymer (Y) (weight fraction) C X : content of carboxylic group of the ethylenically unsaturated carboxylic acid or anhydride component thereof in the polymer (X); (meq/g), S X : content of the styrene vinyl compound component in the polymer (X); (m.mole/g), W X : content of the polymer (X) (weight fraction), W Y : content of the polymer (Y) (weight fraction), and n : number of carboxyl group contained in one molecule of the ethylenically unsaturated carboxylic acid or anhydride thereof.
Claim 2
Dependent Claim
229 words
A laminated article which comprises a layer (A) of a saponified ethylene-vinyl acetate copolymer resin having an ethylene content of 20-55 % by mole and a degree of saponification of not less than 90 % by mole; laminated with a layer (B) of a hydrophobic thermoplastic resin; through the medium of a layer (C) of an adhesive resin; said adhesive resin contains a polymer (X) comprising ethylene component-vinyl acetate component-ethylenically unsaturated carboxylic acid component or anhydride thereof-styrene type vinyl compound component, and a copolymer (Y) comprising ethylene component-vinyl acetate component, in an amount satisfying the following formulae (I), (II), (III), (IV) and (V) |V.sub.X -V.sub.Y |≦0.30 (I) 0.15≦V.sub.X ·W.sub.X +V.sub.Y ·W.sub.Y ≦0.45 (II) 0.01≦C.sub.X ·W.sub.X ≦1 (III) 1.0≦n·S.sub.X /C.sub.X ≦2.0 (IV) 0.1≦W.sub.X /W.sub.Y ≦10 (V) wherein, V X : content of vinyl acetate in the polymer (X) (weight fraction) V Y : content of vinyl acetate in the polymer (Y) (weight fraction) C X : content of carboxylic group of the ethylenically unsaturated carboxylic acid or anhydride component thereof in the polymer (X); (meq/g), S X : content of the styrene vinyl compound component in the polymer (X); (m.mole/g), W X : content of the polymer (X) (weight fraction), W Y : content of the polymer (Y) (weight fraction), and n : number of carboxyl group contained in one molecule of the ethylenically unsaturated carboxylic acid or anhydride thereof.
Claim 3
Dependent Claim
16 words
A laminated article according to claim 1, wherein the hydrophobic thermoplastic resin is a polystyrene resin.
Claim 4
Dependent Claim
17 words
A laminated article according to claim 1, wherein the hydrophobic thermoplastic resin is a polyvinyl chloride resin.
Claim 5
Dependent Claim
16 words
A laminated article according to claim 1, wherein the hydrophobic thermoplastic resin is a polycarbonate resin.
Claim 6
Dependent Claim
58 words
A laminated article according to claim 1, wherein the adhesive resin contains the polymer (X) and the polymer (Y) in an amount satisfying the following formulae (I'), (II'), (II'), (IV') and (V') |V.sub.X -V.sub.Y |≦0.20 (I') 0.2≦V.sub.X ·W.sub.X +V.sub.Y ·W.sub.Y ≦0.4 (II') 0.05≦C.sub.X ·W.sub.X ≦0.8 (III') 0.05≦C.sub.X ·X.sub.X ≦0.8 (III') 1.0≦n·S.sub.X /C.sub.X ≦1.8 (IV') 0.4≦W.sub.X /W.sub.Y ≦2.3 (V').
Claim 7
Dependent Claim
123 words
A laminated article produced by a process which comprises: co-extruding a layer (A) of a saponified ethylene-vinyl acetate copolymer resin having an ethylene content of 20-55% by mole and a degree of saponification of not less than 90% by mole; and a layer (B) of a hydrophobic thermoplastic resin; through the medium of a layer (C) of an adhesive resin; said resin contains a copolymer (X) comprising ethylene component-vinyl acetate component-ethylenically unsaturated carboxylic acid component or anhydride thereof-styrene type vinyl compound component, and a polymer (Y) comprising ethylene component-vinyl acetate component, in an amount satisfying the following formulae (I), (II), (III), (IV) and (V), and taking off the resulting extrudate at a rate of not less then 3 m/min, |V.sub.x -V.sub.y |≦0.30 (I)
Claim 8
Dependent Claim
123 words
A laminated article produced by a process which comprises: co-extruding a layer (A) of a saponified ethylene-vinyl acetate copolymer resin having an ethylene content of 20-55% by mole and a degree of saponification of not less than 90% by mole; and a layer (B) of a hydrophobic thermoplastic resin; through the medium of a layer (C) of an adhesive resin; said resin contains a copolymer (X) comprising ethylene component-vinyl acetate component-ethylenically unsaturated carboxylic acid component or anhydride thereof-styrene type vinyl compound component, and a polymer (Y) comprising ethylene component-vinyl acetate component, in an amount satisfying the following formulae (I), (II), (III), (IV) and (V), and taking off the resulting extrudate at a rate of not less then 3 m/min, |V.sub.x -V.sub.y |≦0.30 (I)
Claim 9
Dependent Claim
126 words
15≦V x ·W x +V y ·W y ≦0.45 (II) 0.01≦C.sub.x ·W.sub.x ≦1 (III) 1.0≦n·S.sub.x /C.sub.x ≦2.0 (IV) 0.1≦W.sub.x /W.sub.y ≦10 (V) wherein, V x : content of vinyl acetate in the polymer (X) (weight fraction) V y : content of vinyl acetate in the polymer (Y) (weight fraction) C x : content of carboxylic group of the ehtylenically unsaturated carboxylic acid or anhydride component thereof in the polymer (X); (meq/g), S x : content of the styrene type vinyl compound component in the polymer (X) (m.mole/g), W x : content of the polymer (X) (weight fraction), W y : content of the polymer (Y) (weight fraction), and n: number of carboxyl group contained in one molecule of the ethylenically unsaturated carboxylic acid or anhydride thereof.
Claim 10
Dependent Claim
126 words
15≦V x ·W x +V y ·W y ≦0.45 (II) 0.01≦C.sub.x ·W.sub.x ≦1 (III) 1.0≦n·S.sub.x /C.sub.x ≦2.0 (IV) 0.1≦W.sub.x /W.sub.y ≦10 (V) wherein, V x : content of vinyl acetate in the polymer (X) (weight fraction) V y : content of vinyl acetate in the polymer (Y) (weight fraction) C x : content of carboxylic group of the ehtylenically unsaturated carboxylic acid or anhydride component thereof in the polymer (X); (meq/g), S x : content of the styrene type vinyl compound component in the polymer (X) (m.mole/g), W x : content of the polymer (X) (weight fraction), W y : content of the polymer (Y) (weight fraction), and n: number of carboxyl group contained in one molecule of the ethylenically unsaturated carboxylic acid or anhydride thereof.
Claim 11
Dependent Claim
16 words
A laminated article according to claim 6, wherein the hydrophobic thermoplastic resin is a polystyrene resin.
Claim 12
Dependent Claim
17 words
A laminated article according to claim 6, wherein the hydrophobic thermoplastic resin is a polyvinyl chloride resin.
Claim 13
Dependent Claim
16 words
A laminated article according to claim 6, wherein the hydrophobic thermoplastic resin is a polycarbonate resin.
References Cited (Backward Citations)
EP0092897A2
Cited
US4576995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |