US4880682A
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US
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Low gloss film and process of manufacture (FP 1323)
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1988-03-22
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Granted: 1989-11-14
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Expires: 2008-03-22
Abstract
Abstract A multilayer film comprises a elastomeric core layer and at least one thermoplastic skin layer having a microundulating surface configuration providing the film with a low gloss.
Inventors
- 👤 Donald R. Hazelton
- 👤 Douglas J. Laurent
- 👤 Lawrence K. Locke
- 👤 William J. Hodgson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:44
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/05; A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51474; A61F13/51476; A61F13/51478; B29; B29C; B29C55/00; B29C55/02; B29C55/023; B32B25/00; B32B25/04; B32B25/08; A61F13/51401; A61F2013/51409; A61F2013/51429; B29K; B29K2995/00; B29K2995/0018; B29K2995/0024; B32B2307/00; B32B2307/40; B32B2307/408; B32B2307/50; B32B2307/51; B32B2319/00; B32B2323/00; B32B2323/04; B32B2323/10; B32B2331/00; B32B2331/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24802; Y10T428/24826; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/3192
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
67 words
A multilayer coextruded film which comprises (a) a core layer of an elastomeric material; and (b) at least one skin layer of a thermoplastic material, said skin layer being secured to said core layer at spaced apart contact areas and having a microundulating surface in the machine direction or transverse direction such that the film has a gloss of less than 20 as determined by ASTM D1003-67.
Claim 2
Dependent Claim
67 words
A multilayer coextruded film which comprises (a) a core layer of an elastomeric material; and (b) at least one skin layer of a thermoplastic material, said skin layer being secured to said core layer at spaced apart contact areas and having a microundulating surface in the machine direction or transverse direction such that the film has a gloss of less than 20 as determined by ASTM D1003-67.
Claim 3
Dependent Claim
21 words
The film as defined in claim 1 wherein the microundulations of the skin layer provide a gloss of 10 or less.
Claim 4
Dependent Claim
110 words
The film of claim 2 wherein the microundulations provide the skin layer with a profile having an Rpm in excess of 100 microinches and a Pc of at least 30 peaks/cm in the machine direction or transverse direction wherein Rpm and Pc are in the same direction and wherein Rpm is the mean of the maximum height profile above the mean line in the machine direction or transverse direction above and below its centre line; and Pc is the number of local peaks which project through a 75 microinch band centered about the mean line of the surface profile of the skin layer in the machine direction or transverse direction.
Claim 5
Dependent Claim
73 words
The film of claim 3 wherein the film profile has a tp% of less than 25% at a p of 75 microinches and a tp % of less than 90% at a p of 300 microinches, wherein tp % is the bearing ratio and is the length of bearing surface expressed as a % of assessment length in the direction of Rpm and Pc at a depth of p below the highest peak.
Claim 6
Dependent Claim
24 words
The film of claim 3 wherein the skin layer has an Rpm of at least 150 microinches and a Pc of at least 50.
Claim 7
Dependent Claim
68 words
The film as defined in claim 1 wherein the elastomeric material is selected from the group consisting of PIB, EPM, EPDM, Butyl Rubber, block copolymer rubber, and mixtures of these and the thermoplastic material is a copolymer of ethylene and a comonomer selected from the group consisting of olefins having from 3 to 8 carbon atoms, vinyl acetate, methacrylic acid, acrylic acid, butyl acrylate, and mixtures of these.
Claim 8
Dependent Claim
69 words
A multilayer coextruded film comprising (a) an elastomeric core layer; and (b) two thermoplastic skin layers secured to opposite sides of the core layer, said skin layers being secured to the core layer at random spaced apart contact areas to provide each skin layer with microundulating configuration in the machine direction or transverse direction, said film having a gloss value less than 20 as determined by ASTM D 1003-67.
Claim 9
Dependent Claim
69 words
A multilayer coextruded film comprising (a) an elastomeric core layer; and (b) two thermoplastic skin layers secured to opposite sides of the core layer, said skin layers being secured to the core layer at random spaced apart contact areas to provide each skin layer with microundulating configuration in the machine direction or transverse direction, said film having a gloss value less than 20 as determined by ASTM D 1003-67.
Claim 10
Dependent Claim
24 words
The film as defined in claim 7 wherein the skin layers are composed of a polyolefin selected from ethylene and propylene homopoylmers and copolymers.
Claim 11
Dependent Claim
56 words
The film is defined in claim 8 wherein each skin layer is composed of a copolymer of ethylene and a comonomer selected from the group consisting of vinyl acetate, methacrylic acid, acrylic acid, butyl acrylate, and olefins having from 3 to 8 carbon atoms, said comonomer comprising from 5 to 40 wt % of the copolymer.
Claim 12
Dependent Claim
33 words
The film as defined in claim 9 wherein the olefin is selected from the group consisting of butene and hexene wherein said olefin comprises from 10 to 35 wt % of the copolymer.
Claim 13
Dependent Claim
33 words
The film as defined in claim 7 wherein the thickness of the film is 10 mils or less and the core layer comprises from 60 to 90 wt % of the film thickness.
Claim 14
Dependent Claim
27 words
The film as defined in claim 7 wherein the film upon being stretched at least 100% of its length has substantially higher gloss than the unstretched condition.
Claim 15
Dependent Claim
17 words
The film as defined in claim 7 wherein the film has a gloss of 10 or less.
Claim 16
Dependent Claim
49 words
The film of claim 13 wherein the thermoplastic skin layers comprise EVA wherein the Va comprises from 5 to 40 wt % of the copolymer and the core layer comprises a blend of 30 to 70 wt % of EPM and 70 to 30 wt % of butyl rubber.
Claim 17
Dependent Claim
27 words
The film of claim 13 wherein the core layer comprises a rubber selected from the group consisting of EPM, butyl rubber, block copolymer rubber, and blends thereof.
Claim 18
Dependent Claim
41 words
The film as defined in claim 15 wherein the core layer comprises from from 25 to 45 wt % of EPM, from 25 to 45 wt % of butyl rubber, and from 50 to 10 wt % of block copolymer rubber
Claim 19
Dependent Claim
23 words
The film of claim 15 wherein the block copolymer rubber is selected from the group consisting of styrene-ethylene- butylene-styrene and styrene-butadine-styrene block copolymer.
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JPS5611231A
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US4522887A
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US4769261A
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JPH05131773A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |