US4315048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite structures based on polyolefin fibers and process for making same
Assignee: Merak SpA
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Filing: 1980-03-11
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Granted: 1982-02-09
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Expires: 2000-03-11
Abstract
Abstract Composite structures made up of a plurality of superimposed layers, one a layer of polyolefin fibers, another a polyolefin film, and the third a reinforcing element interposed between the fiber layer and the polyolefin film are disclosed, as is a particular process for making the composite structures.
Inventors
- 👤 Benito Beghelli
- 👤 Vincenzo De Angelis
- 👤 Mauro Navone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:34
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C51/00; B29C51/16; B29C70/00; B29C70/02; B29C70/021; B29C70/023; B29C70/026; B29C70/68; B29C70/688; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/14; B32B15/18; B32B15/20; B32B21/00; B32B21/04; B32B21/08; B32B21/10; B32B27/06; B32B27/08; B32B27/32; B32B3/00; B32B3/26; B32B3/266; B32B5/00; B32B5/02; B32B5/08; B29K; B29K2023/00; B29K2223/00; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/10; B32B2262/101; B32B2262/14; B32B2305/00; B32B2305/08; B32B2305/10; B32B2305/20; B32B2305/38; B32B2310/00; B32B2310/08; B32B2310/0806; B32B2310/0825; B32B2323/00; B32B2323/10; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
A composite structure comprising: (a) a layer of fibers comprising polyolefin fibers and which is in the form of a fabric, a non-woven fabric, a mat, or a carpet; (b) an unoriented polyolefin film having a thickness of 50 to 2,500 microns; and (c) interposed between the fiber layer and the polyolefin film, a reinforcing element selected from the group consisting of metal foils, metal nets, stiff plastic sheets, paperboard and structures comprising glass fibers, said reinforcing element having smaller dimensions than the fiber layer and being provided with a plurality of holes through which the polyolefin film contacts the fiber layer and is heat-set to it.
Claim 2
Dependent Claim
107 words
A composite structure comprising: (a) a layer of fibers comprising polyolefin fibers and which is in the form of a fabric, a non-woven fabric, a mat, or a carpet; (b) an unoriented polyolefin film having a thickness of 50 to 2,500 microns; and (c) interposed between the fiber layer and the polyolefin film, a reinforcing element selected from the group consisting of metal foils, metal nets, stiff plastic sheets, paperboard and structures comprising glass fibers, said reinforcing element having smaller dimensions than the fiber layer and being provided with a plurality of holes through which the polyolefin film contacts the fiber layer and is heat-set to it.
Claim 3
Dependent Claim
40 words
A composite structure according to claim 1, characterized in that the fiber layer is a blend of polyolefin fibers and fibers of at least one of the group consisting of natural, artificial and synthetic fibers different from said polyolefin fibers.
Claim 4
Dependent Claim
23 words
A composite structure according to claim 1, characterized in that the polyolefin film is a film of polypropylene consisting prevailingly of isotactic macromolecules.
Claim 5
Dependent Claim
16 words
Use of a composite structure according to claim 1, as panels, furnishing articles, and pipe coatings.
References Cited (Backward Citations)
US4088805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |