US4632858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filler fleece material and method of manufacturing same
Assignee: Carl Freudenberg KG
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Filing: 1984-10-30
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Granted: 1986-12-30
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Expires: 2004-10-30
Abstract
Abstract The filler fleece material of the invention consists of a laminate of two layers of fleece containing bonding fibers. The thinner layer, which serves as a covering fleece, consists to at least 60% of thermoplastic bonding fibers which melt at the same or a lower temperature than those of the central fleece. This combination makes it possible, after the depositing of the fiber layers and the thermal consolidation of the central fleece, to perform a process for smoothing the cover layer, in which the laminate is exposed in a roller gap to a temperature that is above the fiber melting point of the cover fleece. The filler fleece material of the invention, on account of its smooth yet still sufficiently air-permeable cover layer, is no longer subject to fiber protrusion. Furthermore, the clinging of projecting fibers during application to textile surface materials is reliably prevented.
Inventors
- 👤 Jurgen Knoke
- 👤 Helmut Jager
- 👤 Ludwig Dekant
- 👤 Dieter Groitzsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/559; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/641
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
A filler fleece material comprising a laminate having a central fleece containing thermoplastic bonding fibers and a cover fleece, said cover fleece having a specific weight of 4 to 20 g/m 2 and consisting of at least 60% of thermoplastic bonding fibers which melt at the same or a lower temperature than the bonding fibers of the central fleece, said cover fleece having a thin and smooth porous surface formed by thermofusion without pressure in a gauged gap.
Claim 2
Dependent Claim
78 words
A filler fleece material comprising a laminate having a central fleece containing thermoplastic bonding fibers and a cover fleece, said cover fleece having a specific weight of 4 to 20 g/m 2 and consisting of at least 60% of thermoplastic bonding fibers which melt at the same or a lower temperature than the bonding fibers of the central fleece, said cover fleece having a thin and smooth porous surface formed by thermofusion without pressure in a gauged gap.
Claim 3
Dependent Claim
16 words
The filler fleece material of claim 1, wherein the cover fleece surface is smoothed by thermofusion.
Claim 4
Dependent Claim
22 words
The filler fleece material of claim 2, wherein the cover fleece has a specific weight of 8 to 14 g/m 2 .
Claim 5
Dependent Claim
18 words
The filler fleece material of claim 3, wherein the cover fleece consists to 100% of thermoplastic bonding fibers.
Claim 6
Dependent Claim
29 words
The filler fleece material of claim 2, wherein the thermoplastic bonding fibers of the cover fleece are bi-component fibers of polyethylene terephthalate and polyethylene or of polypropylene and polyethylene.
Claim 7
Dependent Claim
33 words
The filler fleece material of claim 2, wherein the thermoplastic bonding fibers of the cover fleece are monofilaments which consist of polyamide 6, polybutylene terephthalate, polyolefin, or at 110°-to-190° C.-melting copolyester or copolyamide.
Claim 8
Independent Claim
116 words
A method for producing a filler fleece material as a laminate from a central fleece containing thermoplastic fibers, and a cover fleece, comprising (a) in the same operation as the depositing of the central fleece, forming a laminate by depositing a cover fleece thereon as a fiber sliver with a specific weight of 4 to 20 g/m 2 and a thermoplastic bonding fiber content of at least 60%, the melting point of the bonding fibers being equal to or less than that of the fiber of the central fleece; (b) heating the laminate for thermal consolidation of the central fleece, and then (c) smoothing the cover fleece surface by thermofusion without pressure in a gauged gap.
Claim 9
Independent Claim
116 words
A method for producing a filler fleece material as a laminate from a central fleece containing thermoplastic fibers, and a cover fleece, comprising (a) in the same operation as the depositing of the central fleece, forming a laminate by depositing a cover fleece thereon as a fiber sliver with a specific weight of 4 to 20 g/m 2 and a thermoplastic bonding fiber content of at least 60%, the melting point of the bonding fibers being equal to or less than that of the fiber of the central fleece; (b) heating the laminate for thermal consolidation of the central fleece, and then (c) smoothing the cover fleece surface by thermofusion without pressure in a gauged gap.
Claim 10
Independent Claim
14 words
The method of calim 7, wherein the laminate is heated in a thermofusion oven.
Claim 11
Independent Claim
14 words
The method of calim 7, wherein the laminate is heated in a thermofusion oven.
Claim 12
Dependent Claim
38 words
The method of claim 8, wherein the smoothing of the covdr fleece takes place by guiding the material in a gauging operation through a roller gap at a temperature above the fiber melting point of the cover fleece.
Claim 13
Dependent Claim
24 words
The method of claim 8, wherein the smoothing of the covering fleece surface is performed in a separate operation after leaving the thermofusion oven.
Claim 14
Dependent Claim
22 words
The filler fleece material of claim 5, wherein the thermoplastic bonding fibers of the cover fleece are a mixture of bi-component fibers.
Claim 15
Dependent Claim
21 words
The filler fleece material of claim 6, wherein the thermoplastic bonding fibers of the cover fleece are a mixture of monofilaments.
Claim 16
Dependent Claim
24 words
The filler fleece material of claim 1, wherein the thermoplastic bonding fibers of the cover fleece are a mixture of bi-component fibers and monofiliaments.
References Cited (Backward Citations)
US4129675A
Cited
US4508113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |