US3620892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally stable articles and method of making same
Assignee: Honeywell International Inc
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Filing: 1968-05-07
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Granted: 1971-11-16
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Expires: 1988-05-07
Abstract
Abstract Dimensionally stable articles are produced from heat-treating fabric comprised of multiconstituent filaments prepared from blended fiber-forming polymeric materials having different properties, at least one of the fiber-forming polymeric materials being dispersed as discontinuous fibrils in a lower melting matrix formed by another polymeric material, and natural or synthetic filaments which may or may not have heattreating capabilities. The article is produced by preforming the fabric, during production of the fabric itself or by subsequent operation, and heating the latter to a temperature equal to or above the melting temperature of the multiconstituent matrix material but below that of the dispersed polymeric material, for a time sufficient to impart a shape stabilized property to the multiconstituent filaments and consequently to the fabric article. The multiconstituent filaments are present in the fabric as individual yarn or filament elements in combination with other materials, or are present in a mechanically blended fiber or yarn with other materials.
Inventors
- 👤 Robert C Wincklhofer
- 👤 Gene C Weedon
- 👤 George H Collingwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:30
CPC Classifications
F; F02; F02B; F02B53/00; D; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D02G3/402; D03; D03D; D03D1/00; D03D15/00; D03D15/20; D03D15/283; D03D15/292; D03D15/50; D03D15/587; D04; D04B; D04B1/00; D04B1/14; D04B1/16; D04H; D04H1/00; D04H1/40; D04H1/54; D06; D06M; D06M23/00; D06M23/06; D06N; D06N3/00; D06N3/0002; D06N3/0004; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/04; D10B2401/00; D10B2401/04; D10B2401/041; D10B2401/06; D10B2401/062; D10B2403/00; D10B2403/01; D10B2403/011; D10B2403/0114; D10B2501/00; D10B2501/04; D10B2501/043; D10B2501/06; D10B2503/00; D10B2503/04; D10B2505/00; D10B2505/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/2481; Y10T428/24818; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2973; Y10T442/00; Y10T442/30; Y10T442/3146; Y10T442/40; Y10T442/444; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/611; Y10T442/637
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
The product of claim 1 wherein the multiconstituent filaments are melt spun from at least two fiber-forming thermoplastic polymers of which said matrix-forming polymers has a melting index at least 10* C. lower than said dispersed fibrils.
Claim 2
Dependent Claim
22 words
The product of claim 2 wherein the said matrix-forming polymer comprises from 20 to 50 percent by weight of said multiconstituent filaments.
Claim 3
Dependent Claim
20 words
The product of claim 3 wherein the multiconstituent filaments comprise at least 30 percent by weight of the fibrous structure.
Claim 4
Dependent Claim
25 words
The product of claim 4 where polymer forming the matrix of said multiconstituent filaments is selected from the group consisting of polyolefins, polyamides and polyesters.
Claim 5
Dependent Claim
28 words
The product of claim 4 wherein the dispersed fibrils are formed from a polymer selected from the group consisting of polyolefins, polyamides, polyesters, polysulfones, polyphenylene oxides and polycarbonates.
Claim 6
Dependent Claim
10 words
The product of claim 5 wherein the matrix is polycaproamide.
Claim 7
Dependent Claim
11 words
The product of claim 6 wherein the fibrils are polyethylene terephthalate.
Claim 8
Dependent Claim
19 words
The product of claim 1 wherein said multiconstituent filaments and said other filaments are joined together as a yarn.
Claim 9
Dependent Claim
28 words
The product of claim 1 wherein one of the surfaces of said fibrous structure is predominantly multiconstituent filaments and the opposite surface predominantly composed of said other filaments.
Claim 10
Dependent Claim
18 words
The product of claim 1 wherein said fused multiconstituent filaments retain their approximately original fiber-forming appearance and shape.
Claim 11
Dependent Claim
224 words
The method of manufacturing the dimensionally-stable fibrous structure as defined by claim 1, comprising: i. providing textile material comprised of a blend of (a) a first component of multiconstituent filaments spun from at least two different polymeric materials such that, in a given filament, a first fiber-forming polymeric material defines a matrix and a second polymeric material is dispersed therein in the form of discontinuous fibrils, said matrix comprising at least about 50 percent by weight of the filament and having a lower melting point than said dispersed fibrils, and (b) a second component of fibrous material selected from the group consisting of those natural, synthetic or inorganic materials which are capable of withstanding the heat required to elevate the multiconstituent filaments to at least the melt temperature of the matrix thereof; ii. shaping said textile material to the configuration of the fibrous structure desired; and iii. heat-treating and fusion bonding said textile material at a temperature in the range above the melting point of the matrix but below the melting point of the dispersed fibrils such that the multiconstituent filaments thereof are set and fusion bonded at least at their cross points without substantial polymer flow, disfiguration, and cross-sectional flattening, whereby a textile appearance is aesthetically retained and the resultaNt fused textile material is characterized by an enhanced stiffness, shape stability and moldability.
Claim 12
Dependent Claim
29 words
A method as defined by claim 12 wherein said fibrous structure is comprised of a composite yarn formed from the filaments of both of the components (a) and (b).
Claim 13
Dependent Claim
31 words
A method as defined by claim 12 wherein said fibrous structure is comprised of yarn formed from filaments of the components (a) and yarn formed from filaments of the component (b).
Claim 14
Dependent Claim
56 words
A method as defined in claim 12 wherein said fabric structure is prepared in a manner such that one surface is predominantly composed of multiconstituent filaments and the opposite side of another filament and said heat-treating is carried out under conditions whereby the multiconstituent filaments are heated as aforesaid to the exclusion of said other filaments.
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |