Blow-molded container with pinch-off part
AssigneeKuraray Co., Ltd.
InventorWataru Hirose
Life of this patent
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Abstract
There is provided a blow-molded container having a pinch-off part and having, as an innermost layer, a layer of resin composition comprising an ethylene-vinyl alcohol copolymer (A) and a soft resin (B), characterized in that the soft resin (B) is a thermoplastic styrenic elastomer or α-olefinic polymer; a mass ratio of the ethylene-vinyl alcohol copolymer (A) to the soft resin (B) [(A)/(B)] is within the range of 75/25 to 90/10; the resin composition has a matrix and domain structure in which the ethylene-vinyl alcohol copolymer (A) is a matrix phase and the soft resin (B) is a domain phase; and a surface-to-surface interparticle distance in the domain phase is 0.3 μm or less.
Claims7
A blow-molded container, comprising
- a pinch-off part and
- as an innermost layer, a layer of resin composition, the resin therein consisting of an ethylene-vinyl alcohol copolymer (A) and a soft resin (B),
- wherein the soft resin (B) is a thermoplastic styrenic elastomer or α-olefinic polymer;
- a mass ratio of the ethylene-vinyl alcohol copolymer (A) to the soft resin (B) [(A)/(B)] ranges from 80/20 to 90/10;
- the resin composition has a matrix and domain structure in which the ethylene-vinyl alcohol copolymer (A) is a matrix phase and the soft resin (B) is a domain phase;
- a surface-to-surface interparticle distance in the domain phase is 0.3 μm or less;
- a melt flow rate of the resin composition measured under a load of 2160 g at 210° C. is ⅕ or more and ⅔ or less of a melt flow rate of the ethylene-vinyl alcohol copolymer (A);
- and
- a melt flow rate of the soft resin (B) measured under a load of 2160 g at 210° C. is 1.0 to 100 g/10 min.
Dependencies are inferred from the claim text.