Patent EP0415758A2 successfully refreshed from Google Patents.
EP0415758A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Stretchable laminate constructions and manufacturing process
Assignee: 3M Co
•
Filing: 1990-08-30
•
Granted: —
•
Expires: 2010-08-30
Abstract
Abstract Stretchable laminate constructions (10) and a process for their manufacture based on an elastic fabric (14) and a substantially non-elastic film (12) which are held in intimate contact with one another by means of a discontinuous pattern of adhesive (16) are disclosed. When the laminate constructions (10) of the invention are in a relaxed state, the length of the film (12) between adjacent adhesion points (16) along the direction of stretch of the elastic fabric (14) is substantially equivalent to the length of the elastic fabric (14) between the same adhesion points (16) when the construction (10) is extended to its elastic recovery limit. A preferred embodiment of the invention utilizes waterproof breathable non-elastic membranes (12) to produce laminate constructions (10) suitable for clean room and protective garment applications.
Inventors
- 👤 Brian D. Minnesota Mining And Johnson
- 👤 Malcolm B. Minnesota Mining And Burleigh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:15
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/04; A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; A41D31/18; A41D31/185; B32B27/00; B32B27/12; B32B27/32; B32B27/40; B32B37/00; B32B37/12; B32B37/1284; B32B37/1292; B32B37/14; B32B37/144; B32B5/022; B32B5/024; B32B5/026; D; D06; D06N; D06N3/00; D06N3/0002; D06N3/0015; D06N3/0025; D06N3/0029; D06N3/04; D06N3/045; D06N3/12; D06N3/14; D06N7/00; D06N7/0092; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/0261; B32B2262/0276; B32B2262/06; B32B2262/062; B32B2307/00; B32B2307/50; B32B2307/51; B32B2307/70; B32B2307/724; B32B2307/726; B32B2307/7265; B32B2307/728; B32B2307/73; D06N2203/00; D06N2203/04; D06N2203/042; D06N2203/06; D06N2203/068; D06N2209/00; D06N2209/10; D06N2209/105; D06N2209/12; D06N2209/121; D06N2209/123; D06N2209/126; D06N2209/128; D06N2209/14; D06N2209/141; D06N2209/142; D06N2211/00; D06N2211/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A stretchable laminate (10) construction, said laminate construction (10) comprising an elastic fabric (14) having a discontinuous adhesive pattern (16) on at least one face which is bonded to a substantially non-elastic film (12), wherein when said laminate construction (10) is in a relaxed configuration, the length of said film (12) between adjacent adhesion points (16) in the direction of stretch of said elastic fabric (14) is substantially equivalent to the length of said elastic fabric (14) between the same adhesion points (16) when said laminate construction (10) is extended to its elastic recovery limit.
Claim 2
Dependent Claim
95 words
A stretchable laminate (10) construction, said laminate construction (10) comprising an elastic fabric (14) having a discontinuous adhesive pattern (16) on at least one face which is bonded to a substantially non-elastic film (12), wherein when said laminate construction (10) is in a relaxed configuration, the length of said film (12) between adjacent adhesion points (16) in the direction of stretch of said elastic fabric (14) is substantially equivalent to the length of said elastic fabric (14) between the same adhesion points (16) when said laminate construction (10) is extended to its elastic recovery limit.
Claim 3
Dependent Claim
19 words
The stretchable laminate (10) construction of Claim 1 wherein said substantially non-elastic film (12) comprises a waterproof, breathable film.
Claim 4
Dependent Claim
22 words
The stretchable laminate (10) construction of Claim 2 wherein said laminate construction (10) has a MVTR of at least 600 gm/m²/24 hours.
Claim 5
Dependent Claim
18 words
The stretchable laminate (10) construction of Claim 2 wherein said waterproof, breathable film (12) comprises a hydrophobic film.
Claim 6
Dependent Claim
18 words
The stretchable laminate (10) construction of Claim 2 wherein said waterproof, breathable film (12) comprises a hydrophilic film.
Claim 7
Dependent Claim
26 words
The stretchable laminate (10) construction of Claim 2 wherein said adhesive (16) covers less than about 60% of one face of said waterproof, breathable film (12).
Claim 8
Dependent Claim
207 words
A process for forming a stretchable laminate (10) construction comprising an elastic fabric (14) having a discontinuous adhesive pattern (16) on at least one face and a substantially non-elastic film (12) bonded to said adhesive (16), wherein when said laminate (10) construction is in a relaxed configuration, the length of said film (12) between adjacent adhesion points (16) in the direction of stretch of said elastic fabric (14) is substantially equivalent to the length of said elastic fabric (14) between the same adhesion points (16) when said laminate (10) construction is extended to its elastic recovery limit, said process comprising the steps of: a) stretching the elastic fabric (14) in its longitudinal direction to approximately 135 - 180% of its original length; b) applying a curable adhesive (16) to at least one face of either the elastic fabric (14) or the substantially non-elastic film (12) in a discontinuous pattern; c) creating a stretched film/fabric laminate (10) by contacting the film (12) and fabric (14) with each other through an adhesive coated interface (16); d) forming an uncured stretched laminate (10) construction by pressing the stretched film(12)/fabric (14) laminate (10) together; and e) curing the adhesive (16) while maintaining the uncured stretchable laminate construction in a stretched configuration.
Claim 9
Dependent Claim
207 words
A process for forming a stretchable laminate (10) construction comprising an elastic fabric (14) having a discontinuous adhesive pattern (16) on at least one face and a substantially non-elastic film (12) bonded to said adhesive (16), wherein when said laminate (10) construction is in a relaxed configuration, the length of said film (12) between adjacent adhesion points (16) in the direction of stretch of said elastic fabric (14) is substantially equivalent to the length of said elastic fabric (14) between the same adhesion points (16) when said laminate (10) construction is extended to its elastic recovery limit, said process comprising the steps of: a) stretching the elastic fabric (14) in its longitudinal direction to approximately 135 - 180% of its original length; b) applying a curable adhesive (16) to at least one face of either the elastic fabric (14) or the substantially non-elastic film (12) in a discontinuous pattern; c) creating a stretched film/fabric laminate (10) by contacting the film (12) and fabric (14) with each other through an adhesive coated interface (16); d) forming an uncured stretched laminate (10) construction by pressing the stretched film(12)/fabric (14) laminate (10) together; and e) curing the adhesive (16) while maintaining the uncured stretchable laminate construction in a stretched configuration.
Claim 10
Dependent Claim
17 words
The process of Claim 7 wherein said adhesive (16) is applied to the substantially inelastic film (12).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.