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Patent Searching and Data


Title:
PELLETS AND MELT-MOLDED PRODUCTS MADE FROM THEM, AND METHOD FOR PRODUCING THEM
Document Type and Number:
Japanese Patent JP2021028356
Kind Code:
A
Abstract:
To provide ethylene-vinyl alcohol copolymer pellets that have excellent color resistance and long-running property during melt molding, have suppressed fluctuation in the volatile carboxylic acid content even when the moisture-absorbing EVOH pellets are re-dried, and have excellent long-running property during melt molding.SOLUTION: There is provided pellets containing an ethylene-vinyl alcohol copolymer (A) as a main component, in which ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 15 to 60 mol% and a saponification degree of 85 mol% or more. It contains 50 to 500 ppm of alkali metal ion (B), 10 to 100 ppm of divalent metal ion (C), and 20 to 400 ppm of carboxylic acid (D) having a boiling point of less than 150°C. The pellets have the difference in heat of fusion (ΔHp-ΔHm) between the heat of fusion ΔHp of the pellet measured by scanning calorimetry and the heat of fusion ΔHm measured after melting and re-solidifying the pellet is 5 J/g or more.SELECTED DRAWING: None

Inventors:
YOSHIDA KENTARO
Application Number:
JP2019147486A
Publication Date:
February 25, 2021
Filing Date:
August 09, 2019
Export Citation:
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Assignee:
KURARAY CO
International Classes:
C08L29/04; B29B13/06; C08J99/00; C08K3/22; C08K3/32; C08K3/38; C08K5/09