US3673147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing delustered filaments and fibers
Assignee: Honeywell International Inc
•
Filing: 1970-04-27
•
Granted: 1972-06-27
•
Expires: 1990-04-27
Abstract
Abstract The process for preparing delustered filaments and fibers is carried out by adding an amount of delustrant in a ratio of 5 to 20 parts by weight of delustrant per 100 parts of polymer chips under an inert blanket, grinding said delustrant with said polymer chips with grinding balls of about one-half to 1 1/4 inches in diameter by vibrating at about 2 to 10 mm amplitude and at a frequency of about 600 to 3,600 cycles per minute while incrementally increasing the temperature from about ambient to about 20* C. below the softening point of said polymer and obtaining a pigment dispersion of substantially less than 1 micron particle size and separating the balls from the pigmented polymer.
Inventors
- 👤 Thomas P Bor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:35
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; B; B29; B29B; B29B13/00; B29B13/10; B29B7/00; B29B7/80; B29B7/88; B29B7/90; B29B7/905; D01F1/00; D01F1/02; D01F1/10; D01F6/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
The process of claim 1 wherein the ratio of grinding balls to delustrant and polymer chips is about 0.8 to 1.2 by volume.
Claim 2
Dependent Claim
21 words
The process of claim 1 wherein the condensation polymer is selected from the group consisting of polycaproamide and polyester polymer chips.
Claim 3
Dependent Claim
13 words
The process of claim 3 wherein the polymer chips are amorphous or crystalline.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the delustrant is selected from the group consisting of rutile titanium dioxide and anatase titanium dioxide.
Claim 5
Dependent Claim
23 words
The process of claim 1 wherein the inert atmosphere Is selected from the group consisting of the inert gases, nitrogen and carbon dioxide.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein the inert atmosphere is nitrogen.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein the polymer chips are amorphous and the temperature incremental increase is carried out over a period of about 45 to 75 minutes.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein the moisture content of the polymer chips is about 0.1 to about 0.5 percent.
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |