Title:
多層ボトル
Document Type and Number:
Japanese Patent JP5104318
Kind Code:
B2
Abstract:
There is provided a multilayer bottle including outermost and innermost layers each made mainly of a polyester (A) and at least one barrier layer interposed between the outermost and innermost layers. The polyester (A) is a thermoplastic resin obtained by polymerizing a dicarboxylic acid component containing 80 mol% or more of terephthalic acid with a diol component containing 80 mol% or more of ethylene glycol. The barrier layer is composed of a polyamide (B) and a polyamide (C). The polyamide (B) is obtained by polycondensing a diamine component containing 70 mol% or more of m-xylylenediamine with a dicarboxylic acid component containing 70 mol% or more of an ±,É-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms. The polyamide (C) has a higher saturation water content than that of the polyamide (B) as measured at 23°C and 50% RH under 1 atm, and a content of the polyamide (C) in the barrier layer is 20% by weight or less on the basis of a weight of the barrier layer. The multilayer bottle hardly suffers from delamination upon dropping or upon exposure to impact and, therefore, is not required to have a shape with less irregularities or less bends for preventing the delamination, and further has a large freedom of design choice.
Inventors:
Atsushi Mitadera
Katsuya Maruyama
Maruo Kazuo
Tomonori Kato
Katsuya Maruyama
Maruo Kazuo
Tomonori Kato
Application Number:
JP2007554880A
Publication Date:
December 19, 2012
Filing Date:
January 15, 2007
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Ltd.
International Classes:
B32B1/02; B32B27/34; B65D1/00; B65D65/40
Domestic Patent References:
| JP2004352361A | 2004-12-16 | |||
| JP2004351668A | 2004-12-16 | |||
| JP2004160935A | 2004-06-10 |
Attorney, Agent or Firm:
Tamotsu Otani