US4370375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion-resistant monofilament with molybdenum disulfide useful in the formation of papermaking belts
Assignee: EIDP Inc
•
Filing: 1981-04-20
•
Granted: 1983-01-25
•
Expires: 2001-04-20
Abstract
Abstract Polyamide monofilaments containing molybdenum disulfides exhibit outstanding resistance to abrasive forces applied transversely to the longitudinal dimension of the monofilament, making the monofilaments particularly suitable for use in woven papermaking belts.
Inventors
- 👤 William B. Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:55
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/58; D01F6/60; D01F6/88; D01F6/90; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10S162/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T442/00; Y10T442/30; Y10T442/3065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A polyamide monofilament characterized by improved transverse abrasion resistance, oriented about from 3.4 to 6.0 times the original length, having a diameter of about from 5 to 30 mils and comprising filament-forming polyamide and about from 3 to 10 weight percent, based on the total weight of the monofilament, of molybdenum disulfide.
Claim 2
Dependent Claim
52 words
A polyamide monofilament characterized by improved transverse abrasion resistance, oriented about from 3.4 to 6.0 times the original length, having a diameter of about from 5 to 30 mils and comprising filament-forming polyamide and about from 3 to 10 weight percent, based on the total weight of the monofilament, of molybdenum disulfide.
Claim 3
Dependent Claim
16 words
A monofilament of claim 1 further comprising about from 1 to 3 weight percent lithium bromide.
Claim 4
Dependent Claim
17 words
A monofilament of claim 1 wherein the molybdenum disulfide comprises about from 3 to 5 weight percent.
Claim 5
Dependent Claim
13 words
A monofilament of claim 1 wherein the polyamide consists essentially of nylon 66.
Claim 6
Dependent Claim
13 words
A monofilament of claim 1 wherein the polyamide consists essentially of nylon 612.
Claim 7
Dependent Claim
21 words
A monofilament of claim 1 wherein the molybdenum disulfide has an average particle size of about from 1 to 8 microns.
Claim 8
Dependent Claim
63 words
In a woven, heat set, papermaking belt of machine and transverse direction thermoplastic filaments, the improvement wherein at least about 25% of the filaments in the transverse direction are monofilaments having a diameter of about from 5 to 30 and comprising filament forming polyamide and about from 3 to 10 weight percent, based on the total weight of the filament, of molybdenum disulfide.
Claim 9
Dependent Claim
63 words
In a woven, heat set, papermaking belt of machine and transverse direction thermoplastic filaments, the improvement wherein at least about 25% of the filaments in the transverse direction are monofilaments having a diameter of about from 5 to 30 and comprising filament forming polyamide and about from 3 to 10 weight percent, based on the total weight of the filament, of molybdenum disulfide.
Claim 10
Dependent Claim
21 words
A papermaking belt of claim 8 wherein the polyamide monofilaments comprise about from 25% to 50% of the transverse direction strands.
References Cited (Backward Citations)
US2855377A
Cited
US2849415A
Cited
US3239485A
Cited
US3164947A
Cited
US3493544A
Cited
FR1557047A
Cited
US4154886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |