US4394413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant dryer fabrics
Assignee: Scapa Inc
•
Filing: 1981-02-09
•
Granted: 1983-07-19
•
Expires: 2001-02-09
Abstract
Abstract The present invention is directed at modifying a resin-treated dryer fabric in such a way that its scaffolding effect is reduced or eliminated. Further, according to the teachings of the present invention, the resin used to coat the dryer fabric is itself made self-extinguishing, such that even if the fabric acts as a scaffold, the resin will not burn. Even further, a degree of flame retardancy is imparted to the base fabric in those cases where the base fabric itself is not self-extinguishing. A dryer fabric in which the woven fabric material is treated with an admixture of flame retardant material and resin, such that the flame retardant and resin are added to either the yarns of the fabric or the woven fabric at the same time. The admixture may take the form of a solution, a suspension, a colloidal suspension, a dispersion or an emulsion of flame retardant material and resin. The flame retardant material is preferably a water soluble material having an active phosphorous ingredient, preferably at the 15% level. The retardant material, in some cases, can also be a high bromide content material.
Inventors
- 👤 William T. Westhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:05
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0036; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T442/00; Y10T442/30; Y10T442/3049; Y10T442/3179; Y10T442/3195; Y10T442/3203; Y10T442/322; Y10T442/3228; Y10T442/3236; Y10T442/3252
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
85 words
A flame retardant dryer fabric comprising: a plurality of interwoven machine direction and cross-machine direction yarns; and an admixture of resin and flame retardant coating said machine direction and cross-machine direction yarns, said resin being chosen for its known ability to provide fabric stability, wear and abrasion resistance, heat and hydrolysis resistance, resistance to chemical attack, modulus, and oil and dirt resistance; said flame retardant being compatible with said resin; and said admixture being free of nucleation and being an integral part of said fabric.
Claim 2
Dependent Claim
85 words
A flame retardant dryer fabric comprising: a plurality of interwoven machine direction and cross-machine direction yarns; and an admixture of resin and flame retardant coating said machine direction and cross-machine direction yarns, said resin being chosen for its known ability to provide fabric stability, wear and abrasion resistance, heat and hydrolysis resistance, resistance to chemical attack, modulus, and oil and dirt resistance; said flame retardant being compatible with said resin; and said admixture being free of nucleation and being an integral part of said fabric.
Claim 3
Dependent Claim
16 words
The dryer fabric of claim 1, wherein said flame retardant is water soluble and contains phosphorus.
Claim 4
Dependent Claim
15 words
The dryer fabric of claim 1, wherein said resin is an acrylic or epoxy resin.
Claim 5
Dependent Claim
25 words
The dryer fabric of claim 1, wherein said flame retardant is present in an amount of approximately 5-15% based upon total weight of said resin.
Claim 6
Dependent Claim
41 words
The dryer fabric of claim 1, wherein the components of the machine direction and cross-machine direction yarns are selected from the group consisting of spun synthetic yarn material, non-spun synthetic yarn material, and combinations of spun and/or non-spun synthetic yarn materials.
Claim 7
Dependent Claim
27 words
The dryer fabric of claim 1, wherein the components of the machine direction and cross-machine direction yarns comprise polyester, glass, acrylic, nylon, aramid fiber, and mixtures thereof.
Claim 8
Dependent Claim
48 words
The dryer fabric of claim 1, wherein the warp yarn of the dryer fabric comprises 100% polyester or combinations of polyester and other synthetic yarns or combinations of other synthetic yarns not including polyester, and the weft yarn of the dryer fabric comprises glass/synthetic yarn, polyester, or glass.
Claim 9
Dependent Claim
79 words
A flame retardant dryer fabric comprising a woven fabric including a plurality of machine direction yarns, each of said machine direction yarns being coated with a first admixture of both a first resin and a first flame retardant, and a plurality of cross-machine direction yarns, each of said cross-machine direction yarns being coated with a second admixture of a second resin and a second flame retardant, said coatings being applied prior to weaving said yarns into said dryer fabric.
Claim 10
Dependent Claim
79 words
A flame retardant dryer fabric comprising a woven fabric including a plurality of machine direction yarns, each of said machine direction yarns being coated with a first admixture of both a first resin and a first flame retardant, and a plurality of cross-machine direction yarns, each of said cross-machine direction yarns being coated with a second admixture of a second resin and a second flame retardant, said coatings being applied prior to weaving said yarns into said dryer fabric.
Claim 11
Dependent Claim
48 words
The dryer fabric of claim 8, wherein said first and second resins are of the same resin material, said resins being chosen for their known ability to provide fabric stability, wear and abrasive resistance, heat and hydrolysis resistance, resistance to chemical attack, modulus, and oil and dirt resistance.
Claim 12
Dependent Claim
14 words
The dryer fabric of claim 9, wherein said resin material is acrylic or epoxy.
Claim 13
Dependent Claim
53 words
The dryer fabric of claim 8, wherein said first and second flame retardants are of the same flame retardant material, said flame retardants being compatible with their respective resins; said admixtures being free of nucleation, said flame retardant acting to soften said resin; and said admixture increasing the flexibility of said dryer fabric.
Claim 14
Dependent Claim
31 words
The dryer fabric of claim 8, wherein each of said first and second flame retardants are present in an amount of approximately 5-15% based upon total weight of their respective resins.
Claim 15
Dependent Claim
19 words
The dryer fabric of claim 8, wherein at least one of said admixtures further comprises at least one dyestuff.
Claim 16
Dependent Claim
30 words
The dryer fabric of claim 9, wherein each of said admixtures includes a resin solids concentration in the range of 5-9%, where percent is based upon the liquid resin mix.
Claim 17
Dependent Claim
19 words
The dryer fabric of claim 8, wherein at least one of said flame retardants is a complex phosphonate ester.
Claim 18
Dependent Claim
16 words
The dryer fabric of claim 15, wherein 15% phosphorus is present in said complex phosphonate ester.
Claim 19
Dependent Claim
29 words
The dryer fabric of claim 8, wherein at least one of said flame retardants is a compound having tightly cross-linked organic benzene rings, and having a high bromine content.
Claim 20
Dependent Claim
17 words
The dryer fabric of claim 17, wherein said compound contains at least 83% bromine and 0% phosphorus.
Claim 21
Dependent Claim
41 words
The dryer fabric of claim 8, wherein the components of the machine direction and cross-machine direction yarns are selected from the group consisting of spun synthetic yarn material, non-spun synthetic yarn material, and combinations of spun and/or non-spun synthetic yarn materials.
Claim 22
Dependent Claim
27 words
The dryer fabric of claim 8, wherein the components of the machine direction and cross-machine direction yarns comprise polyester, glass, acrylic, nylon, aramid fiber, and mixtures thereof.
Claim 23
Dependent Claim
35 words
The dryer fabric of claim 8, wherein the warp yarn of the dryer fabric comprises polyester or combinations of synthetic yarns, and the weft yarn of the dryer fabric comprises glass/synthetic yarn, polyester, or glass.
Claim 24
Dependent Claim
37 words
The dryer fabric of claim 1, wherein said flame retardant acts to soften said resin, and said admixture increases the flexibility of said fabric over that exhibited by said fabric without the addition of said flame retardant.
Claim 25
Dependent Claim
21 words
The dryer fabric of claim 9, further comprising a third admixture of both a third resin and a third flame retardant.
Claim 26
Dependent Claim
64 words
The dryer fabric of claim 23, wherein said third resin material is acrylic or epoxy, chosen for its known ability to provide fabric stability, wear and abrasion resistance, heat and hydrolysis resistance, resistance to chemical attack, modulus, and oil and dirt resistance; and wherein said third flame retardant is chosen so as to be compatible with said resin; said admixture being free of nucleation.
References Cited (Backward Citations)
US3791854A
Cited
US3877974A
Cited
US3955032A
Cited
US3911189A
Cited
US4151322A
Cited
US4063884A
Cited
US4104433A
Cited
US4178409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |