Title:
MULTILAYER STRUCTURE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/125751
Kind Code:
A1
Abstract:
Disclosed is a multilayer structure which comprises a layer of a resin composition (A) and a layer of a saponified ethylene-vinyl acetate copolymer (B) that has an ethylene content of 20-65% by mole and a saponification degree of the vinyl acetate unit of 96% or more, while having a layer or layers of a polyolefin (C) arranged on one side or both sides of the above-mentioned layers. The resin composition (A) contains: a polyolefin (D); a saponified ethylene-vinyl acetate copolymer (E) that has an ethylene content of 20-65% by mole and a saponification degree of the vinyl acetate unit of 96% or more; and a saponified ethylene-vinyl acetate copolymer (F1) that has an ethylene content of 68-98% by mole and a saponification degree of the vinyl acetate unit of 20% or more and/or an acid-modified ethylene-vinyl acetate copolymer (F2) that has an ethylene content of 68-98% by mole. The mass ratio of the saponified ethylene-vinyl acetate copolymer (E) to the total of the saponified ethylene-vinyl acetate copolymer (F1) and the acid-modified ethylene-vinyl acetate copolymer (F2), namely [E/(F1 + F2)] is 0.05-30. The saponified ethylene-vinyl acetate copolymer (E) having an average particle diameter of 0.1-1.8 μm is dispersed in a matrix of the polyolefin (D). The layer of the resin composition (A) has a thickness of 50-1,000 μm, and each layer of the polyolefin (C) has a thickness of 25-1,000 μm. Consequently, the multilayer structure has good gas barrier properties after retort processing, while having a beautiful appearance.
Inventors:
IGARASHI, Takeyuki (7471, Tamashimaotoshima, Kurashiki-sh, Okayama 50, 〒7138550, JP)
五十嵐 武之 (〒50 岡山県倉敷市玉島乙島７４７１番地 株式会社クラレ内 Okayama, 〒7138550, JP)
HANEDA, Yasuhiko (1-1-3 Otemachi, Chiyoda-k, Tokyo 15, 〒1008115, JP)
五十嵐 武之 (〒50 岡山県倉敷市玉島乙島７４７１番地 株式会社クラレ内 Okayama, 〒7138550, JP)
HANEDA, Yasuhiko (1-1-3 Otemachi, Chiyoda-k, Tokyo 15, 〒1008115, JP)
Application Number:
JP2011/058032
Publication Date:
October 13, 2011
Filing Date:
March 30, 2011
Export Citation:
Assignee:
KURARAY CO., LTD. (1621, Sakazu Kurashiki-sh, Okayama 01, 〒7100801, JP)
株式会社クラレ (〒01 岡山県倉敷市酒津１６２１番地 Okayama, 〒7100801, JP)
IGARASHI, Takeyuki (7471, Tamashimaotoshima, Kurashiki-sh, Okayama 50, 〒7138550, JP)
五十嵐 武之 (〒50 岡山県倉敷市玉島乙島７４７１番地 株式会社クラレ内 Okayama, 〒7138550, JP)
株式会社クラレ (〒01 岡山県倉敷市酒津１６２１番地 Okayama, 〒7100801, JP)
IGARASHI, Takeyuki (7471, Tamashimaotoshima, Kurashiki-sh, Okayama 50, 〒7138550, JP)
五十嵐 武之 (〒50 岡山県倉敷市玉島乙島７４７１番地 株式会社クラレ内 Okayama, 〒7138550, JP)
International Classes:
B32B27/28; B65D65/40; B65D77/00; C08L31/04
Attorney, Agent or Firm:
NAKATSUKASA, Shigeki (Setouchi International Patent Firm, Growth-2 Building 4-9-1, Ima, Kita-ku, Okayama-sh, Okayama 75, 〒7000975, JP)
Claims:
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