JP2017112081A5

JP2017112081A5 -

Info

Publication number: JP2017112081A5
Application number: JP2016019576A
Authority: JP
Filing date: 2016-02-04
Publication date: 2018-03-29

Description

上記の目的を達成するために、本発明に係るインフレーションフィルム法で得られた基材フィルムを片方向に引き伸ばすことによるPP・PE複合構造セパレータの製造方法は、押出成形機を使用してダイにPP材料及びPE材料を同時に送り、混合・共押出し成膜し、共押出インフレーションフィルム機でPP材料からなるフィルム及びPE材料からなるフィルムを多層構造のある基材フィルムに合成する基材フィルム作製工程と、前記基材フィルムをオーブンに入れて110〜130℃で5〜24時間熱処理を行い、前記基材フィルムを伸長率50％〜90％の高弾性状態にする熱処理工程と、加工温度を20〜50℃とし、延伸速度を2〜20m/minとし、延伸率を0.2〜1.5として、前記高弾性状態にある基材フィルムに冷延伸を行い、クレイズを形成する冷延伸工程と、加工温度を100〜125℃とし、延伸速度を2〜20m/minとし、延伸率を0.5〜3として、前記冷延伸後の基材フィルムに熱延伸を行い、微孔構造を形成し、前記微孔構造を構成する複数の孔のうちの80％の孔の径が32〜36nmである時に処理を中止する熱延伸工程と、成型温度を90〜140℃とし、成型速度を2〜20m/minとし、成型比を0.5〜2.5として、前記熱延伸で得られた基材フィルムを、微多孔膜からなるPP・PE複合構造セパレータに成型する成型工程と、を備えている。 In order to achieve the above object, a method for producing a PP / PE composite structure separator by stretching a base film obtained by the inflation film method according to the present invention in one direction is applied to a die using an extruder. PP film and PE material are fed simultaneously, mixed and co-extruded to form a film, and a film made of PP material and a film made of PE material are synthesized into a base film with a multilayer structure using a co-extrusion blown film machine And a heat treatment step of placing the base film in an oven at 110 to 130 ° C. for 5 to 24 hours to bring the base film into a highly elastic state with an elongation of 50% to 90%, and a processing temperature of 20 and to 50 ° C., the stretching rate was 2 to 20 m / min, the stretch ratio in the 0.2 to 1.5, performed cold stretching the substrate film in the high elastic state, and a cold stretching step of forming the crazes, machining Temperature 100 ~ And 125 ° C., the stretching rate was 2 to 20 m / min, a draw ratio as 0.5 to 3, by thermal stretching the substrate film after the cold stretching, a microporous structure is formed, forming the microporous structure A heat stretching process that stops processing when the diameter of 80% of the holes is 32 to 36 nm , a molding temperature of 90 to 140 ° C., a molding speed of 2 to 20 m / min, and a molding ratio of as 0.5-2.5, and a, a molding process of the base film obtained in the heat stretching, molded into PP · PE composite structure separator made of a microporous membrane.

好ましくは、前記熱延伸工程では、前記微孔構造を構成する複数の孔の径を20〜50nmとする。 Preferably, in the thermal stretching step, the diameter of the plurality of holes constituting the microporous structure is set to 20 to 50 nm .

インフレーションフィルム法で得られた基材フィルムに熱処理を行う。このとき、オーブン温度を110℃に設定し、処理時間を5時間に設定し、材料を高弾性状態にすることにより、孔構造にする要件を満たす。基材フィルムの伸長率は、70％に達する。 Heat treatment is performed on the base film obtained by the inflation film method. At this time, the oven temperature is set to 110 ° C., the processing time is set to 5 hours, and the material is brought into a highly elastic state, thereby satisfying the requirement for a pore structure. The elongation rate of the base film reaches 70%.

加工温度20℃、延伸速度2m/min、延伸率0.2という条件で冷延伸を行い、クレイズを形成する。 Cold stretching is performed under the conditions of a processing temperature of 20 ° C., a stretching speed of 2 m / min, and a stretching rate of 0.2 to form craze .

加工温度100℃、延伸速度2m/min、延伸率0.5という条件で熱延伸を行い、微孔構造を形成する。微孔構造を構成する複数の孔の径は30nmである。 Heat stretching is performed under the conditions of a processing temperature of 100 ° C., a stretching speed of 2 m / min, and a stretching rate of 0.5 to form a microporous structure. The diameter of the plurality of holes constituting the microporous structure is 30 nm.

インフレーションフィルム法で得られた基材フィルムに熱処理を行う。このとき、オーブン温度を120℃に設定し、処理時間を15時間に設定し、材料を高弾性状態にすることにより、孔構造にする要件を満たす。基材フィルムの伸長率は、70％に達する。 Heat treatment is performed on the base film obtained by the inflation film method. At this time, the oven temperature is set to 120 ° C., the processing time is set to 15 hours, and the material is made into a highly elastic state, thereby satisfying the requirement for a pore structure. The elongation rate of the base film reaches 70%.

熱処理後の基材フィルムに冷延伸を行う。このとき、加工温度35℃、延伸速度10m/min、延伸率0.8という条件でクレイズを形成する。 Cold-drawing is performed on the base film after the heat treatment. At this time, crazes are formed under the conditions of a processing temperature of 35 ° C., a stretching speed of 10 m / min, and a stretching ratio of 0.8.

加工温度110℃、延伸速度10m/minという条件で熱延伸を行い、微孔構造を形成する。微孔構造を構成する複数の孔の径は35nmである。 Heat stretching is performed under the conditions of a processing temperature of 110 ° C. and a stretching speed of 10 m / min to form a microporous structure. The diameter of the plurality of holes constituting the microporous structure is 35 nm.

インフレーションフィルム法で得られた基材フィルムに熱処理を行う。このとき、オーブン温度を130℃に設定し、処理時間を24時間に設定し、材料を高弾性状態にすることにより、孔構造にする要件を満たす。基材フィルムの伸長率は、70％に達する。 Heat treatment is performed on the base film obtained by the inflation film method. At this time, the oven temperature is set to 130 ° C., the processing time is set to 24 hours, and the material is brought into a highly elastic state, thereby satisfying the requirement for a pore structure. The elongation rate of the base film reaches 70%.

熱処理後の基材フィルムに冷延伸を行う。このとき、加工温度50℃、延伸速度20m/min、延伸率1.5という条件でクレイズを形成する。 Cold-drawing is performed on the base film after the heat treatment. At this time, crazes are formed under the conditions of a processing temperature of 50 ° C., a stretching speed of 20 m / min, and a stretching ratio of 1.5.

加工温度125℃、延伸速度20m/minという条件で熱延伸を行い、微孔構造を形成する。微孔構造を構成する複数の孔の径は45nmである。 Heat stretching is performed under conditions of a processing temperature of 125 ° C. and a stretching speed of 20 m / min to form a microporous structure. The diameter of the plurality of holes constituting the microporous structure is 45 nm.

Claims

PP material and PE material are simultaneously fed to a die using an extrusion molding machine, mixed and co-extruded to form a film, and a film made of PP material and a film made of PE material are co-extruded and blown by a co-extrusion inflation film machine. A base film production process to be synthesized into the film;
The base film is put in an oven and heat treated at 110 to 130 ° C. for 5 to 24 hours , and the base film is made into a highly elastic state with an elongation rate of 50% to 90%, and
The processing temperature of 20 to 50 ° C., the stretching rate was 2 to 20 m / min, the stretch ratio in the 0.2 to 1.5, performed cold stretching the substrate film in the high elastic state, cold drawn to form a Craze Process,
The processing temperature was 100-125 ° C., the stretching rate was 2 to 20 m / min, a draw ratio as 0.5 to 3, by thermal stretching the substrate film after the cold stretching to form a microporous structure, the fine A heat stretching step for stopping the treatment when the diameter of 80% of the plurality of holes constituting the hole structure is 32 to 36 nm;
The molding temperature was 90 to 140 ° C., the molding speed is 2 to 20 m / min, the molding ratio as 0.5 to 2.5, PP · PE composite structure separator substrate film obtained in the heat stretching, made of a microporous membrane Molding process to mold into ,
PP · PE composite structure separator manufacturing method by stretching characterized, the base film obtained in inflation film method unidirectional further comprising a.

The method for producing a PP / PE composite structure separator according to claim 1, wherein the mass ratio of PP and PE is 7: 3 in the base film preparation step.