| 摘要 |
PROBLEM TO BE SOLVED: To provide resistance against permeation of gas, vapor and/or fragrance by including a disk which essentially comprises numerous alternate layers of a matrix polymer substance and a barrier substance. SOLUTION: This (liner) disk 20a essentially comprises numerous alternate layers including a matrix polymer and a barrier substance in parallel to a liner face to be resistant against gas permeation through the liner. The matrix polymer may be a thermoplastic elastomer, a flexible olefin polymer or a combination thereof. The barrier substance may be a thermoplastic substance which has low permeability of gas and/or vapor and exhibits high barrier ability against fragrance and essential oil. The plastic closure comprises a base 30 having a peripheral skirt 32, a cap 22 having a means 34 for fixing the closure with a container and the liner 20a fixed inside the base 30. |
