Replasticization of an already manufactured flexible vinyl product to prevent cracking or tearing of said product
US4615910A · kind A · utility
Inventor
Key dates
| Filing date | Apr 15, 1985 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Apr 15, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is described that can be employed in the field for preventing the formation of cracks and tears in already manufactured and fabricated flexible vinyl products from plasticizer loss induced embrittlement involving replasticization by spreading on the vinyl product a uniform coating of a liquid, vinyl plasticizer at temperatures between 4.degree. C. and 60.degree. C. followed by allowing the product to remain undisturbed for up to ten days at temperatures between 4.degree. C. and 60.degree. C. when the plasticizer will have been absorbed into the interior of the vinyl product as evidenced by the surface of the product exhibiting reduced resiliency, and feeling dry and non tacky to the touch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.