Releasing film
US6309730A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Jun 15, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A releasing film comprising: PA1 a base film produced from a polyethylene naphthalate, and PA1 a releasing layer formed on one or both sides of the base film, wherein the polyethylene naphthalate contains naphthalenedicarboxylic acid as the main acid component and ethylene glycol as the main glycol component and further contains a manganese compound, a phosphorus compound and an antimony compound in Mn, P and Sb amounts satisfying all of the following formulas (1) to (3): EQU 0.7.ltoreq.Mn.ltoreq.1.6 (1) EQU 0.5.ltoreq.Mn/P.ltoreq.1.2 (2) EQU 0.7.ltoreq.Sb.ltoreq.2.2 (3) (wherein Mn is moles of manganese element per 10.sup.6 g of acid component; P is moles of phosphorus element per 10.sup.6 g of acid component; and Sb is moles of antimony element per 10.sup.6 g of acid component), and the base film has a surface center line average roughness (Ra) of 2 to 50 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.