JP2010253869A5

JP2010253869A5 -

Info

Publication number: JP2010253869A5
Application number: JP2009108778A
Authority: JP
Filing date: 2009-04-28
Publication date: 2012-03-15
Anticipated expiration: 2029-04-28

Description

すなわち、本発明は、エチレン−ビニルアルコール共重合体からなるフィルム（Ａ）と紙（Ｃ）とを、接着性樹脂組成物（Ｂ）を用いて溶融押出ラミネートする、フィルム（Ａ）と紙（Ｃ）とが接着性樹脂組成物（Ｂ）からなる層を介して積層されてなる多層構造体の製造方法であって；
接着性樹脂組成物（Ｂ）が、ボロン酸基及び水の存在下でボロン酸基に転化し得るホウ素含有基からなる群より選ばれる少なくとも一つの官能基を有する熱可塑性樹脂（ｂ１）と、前記官能基を有さないポリオレフィン（ｂ２）とを含有し；
前記溶融押出ラミネートする際のダイス温度が２５０〜３００℃であり、該ダイス温度において、ポリオレフィン（ｂ２）のメルトテンション（キャピラリー径１ｍｍ、キャピラリー長１０ｍｍ、押出速度１ｍｍ／分、引取速度１００ｍ／分）が４ｍＮ以下であるとともに、ポリオレフィン（ｂ２）のメルトフローレート（２１６０ｇ荷重下）が４０〜１００ｇ／１０分であり；かつ
熱可塑性樹脂（ｂ１）とポリオレフィン（ｂ２）の質量比（ｂ１／ｂ２）が１／９９〜２０／８０であることを特徴とする多層構造体の製造方法である。 That is, in the present invention, the film (A) and paper (A) and paper (C) made of an ethylene-vinyl alcohol copolymer are melt-extruded laminated using the adhesive resin composition (B). C) and a method for producing a multilayer structure formed by laminating through a layer made of the adhesive resin composition (B);
The adhesive resin composition (B) is a thermoplastic resin (b1) having at least one functional group selected from the group consisting of boron-containing groups that can be converted to boronic acid groups in the presence of boronic acid groups and water; Containing the polyolefin (b2) having no functional group;
The die temperature at the time of the melt extrusion lamination is 250 to 300 ° C., and at the die temperature , the melt tension of the polyolefin (b2) (capillary diameter 1 mm, capillary length 10 mm, extrusion speed 1 mm / min, take-off speed 100 m / min) Is 4 mN or less, and the melt flow rate (under a load of 2160 g) of the polyolefin (b2) is 40 to 100 g / 10 min; and the mass ratio of the thermoplastic resin (b1) to the polyolefin (b2) (b1 / b2) Is 1/99 to 20/80, a method for producing a multilayer structure.

このとき、上記製造方法によって製造された多層構造体を容器形状に組み立てる紙容器の製造方法が好適な実施態様である。
In this case, the manufacturing method of the paper container assembling a multilayer structure manufactured by the above Symbol manufacturing method in the container shape is the preferred embodiment.

Claims

Film (A) and paper (C) made of ethylene-vinyl alcohol copolymer are melt-extruded and laminated using adhesive resin composition (B), and film (A) and paper (C) are adhesive. A method for producing a multilayer structure laminated through a layer comprising a resin composition (B);
The adhesive resin composition (B) is a thermoplastic resin (b1) having at least one functional group selected from the group consisting of boron-containing groups that can be converted to boronic acid groups in the presence of boronic acid groups and water; Containing the polyolefin (b2) having no functional group;
The die temperature at the time of the melt extrusion lamination is 250 to 300 ° C., and at the die temperature , the melt tension of the polyolefin (b2) (capillary diameter 1 mm, capillary length 10 mm, extrusion speed 1 mm / min, take-off speed 100 m / min) Is 4 mN or less, and the melt flow rate (under a load of 2160 g) of the polyolefin (b2) is 40 to 100 g / 10 min; and the mass ratio of the thermoplastic resin (b1) to the polyolefin (b2) (b1 / b2) Is 1 / 99-20 / 80, The manufacturing method of the multilayer structure characterized by the above-mentioned.

A paper container manufacturing method for assembling a multilayer structure manufactured by the manufacturing method according to claim 1 into a container shape.