PLASTIC CHUCK OF IMPROVED DURABILITY

摘要

PROBLEM TO BE SOLVED: To provide a plastic chuck which keeps a low value in an opening strength on an opening side while keeping sufficient strength in opening strength of the side of contents in spite of being capable of adjusting the respective opening strength of the contents side and an opening side and can keep strength close to initial opening strength in both of the opening strength in spite of opening and closing more than 100 times. SOLUTION: A male pawl 13 and a female pawl 15 are engaged with each other to make a pair of plastic chucks. When opening force is applied from the side of the opening part of the plastic chucks, female pawls 14 and 15 are provided on a flange 11 where a part B7 inserted between the base parts of the female pawls consisting of the two pawls of an opening-side female hook part 151 and a contents-side female hook part 141 can be bent.