Melt processible fluororesin molded article
AssigneeChemours-Mitsui Fluoroproducts Co., Ltd.
InventorsHiromasa Yabe, Takahiro Nishimura
Life of this patent
Estimating the term…
Abstract
Provided is a melt processible fluororesin molded article with reduced metal ions after molding (eluted metal ions) and submicron size fine particles. The melt processible fluororesin molded article has an amount of eluted Ni ions (in pg/cm2) and amount of eluted Cr ions (in pg/cm2) and amount of eluted Mo ions (in pg/cm2) in a test solution after eluting for 20 hours at 60° C. using 12% nitric acid, quantitatively analyzed by the ICP (induced coupled plasma) mass analysis method, satisfy the following formula: 0 . 5 ≤ 1 - [ ( M 1 + M 2 ) / ( M 1 + M 2 + M 3 ) ] < 1 , wherein M1 refers to the eluted Cr ion amount (in pg/cm2), M2 refers to the eluted Mo ion amount (in pg/cm2), and M3 refers to the eluted Ni ion amount (in pg/cm2).
Claims11
A melt processible fluororesin molded article,
- wherein an amount of eluted Ni ions in pg/cm2, an amount of eluted Cr ions in pg/cm2, and an amount of eluted Mo ions in pg/cm2 in a test solution after eluting for 20 hours at 60° C. using 12% nitric acid, quantitatively analyzed by an induced coupled plasma mass analysis method, satisfy the following formula:
- 0.68≤1−[(M1+M2)/(M1+M2+M3)]<0.8,
- wherein M1 refers to the eluted Cr ion amount in pg/cm2, M2 refers to the eluted Mo ion amount in pg/cm2, and M3 refers to the eluted Ni ion amount in pg/cm2,
- wherein the amount of the eluted Mo ions measured by the induced coupled plasma mass analysis method is 53 to 144 pg/cm2, the amount of the eluted Cr ions measured by the induced coupled plasma mass analysis method is 149 to 838 pg/cm2, and the amount of the eluted Ni ions measured by the induced coupled plasma mass analysis method is 627 to 3014 pg/cm2,
- wherein the melt processible fluororesin molded article is molded formed from a melt processible fluororesin comprising a copolymer comprising tetrafluoroethylene and 2 to 8 mol % perfluoro (ethylvinyl ether),
- wherein the melt processible fluororesin molded article comprises fine particles in an amount such that 0 to 100 particles/mL are detected, as measured by passing ultrapure water through an automatic measurement fine particle meter for 1 hour as specified in JIS K 0554,
- wherein a zeta potential of a surface of the melt processable molded article measured by the flow potential method is −50 mV or lower.
Dependencies are inferred from the claim text.