Method of making an improved pre-adherized polyester filament yarn
US5693275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Aug 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The method of making a pre-adherized polyester filament yarn with adhesion properties for rubber includes applying a pre-adherizing agent to a polyester filament yarn having a boiling water shrinkage value of <20% while spinning it at not less than 3200 m/min, heat treating the pre-adherized polyester filament yarn with hot air on a bobbin for several days at from 50.degree. to 90.degree. C., and then subjecting the conditioned POY to a single drawing step in which the take-off speed is 1.7 to 2.2 times faster than the inlet speed. Impregnated tire cord made from the polyester filament yarn so treated has a tensile strength of 60 to 70 cN/tex and a tempered shrinkage test value at 190.degree. C. of less than 3.5%, an adhesive power of 18 to 25 daN to rubber, an appearance grade of 2.5-4.0 and a dimensional stability value of greater than 24,000 cN/tex.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.