POLYETHYLENE RESIN COMPOSITION, AND MOLDED BODY

• Main Authors: MATSUBAYASHI TAKESHI, TSUJI KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a polyethylene resin composition capable of suppressing an eye mucus amount originating from a metal soap, suppressing a residual amount of a metal soap, and improving safety of a battery.SOLUTION: A polyethylene resin composition includes an ultrahigh-molecular weight polyethylene powder, and a metal soap, where the viscosity average molecular weight of the ultrahigh-molecular weight polyethylene powder is 100,000-10,000,000, and a strand deposit when extruding with a twin screw extruder under a predetermined condition has a length/breadth of 0.05 or more and 5.0 or less. <Extrusion condition with a twin screw extruder> Polymer concentration: the polymer concentration is adjusted to a formula I value or more and a formula II value or less according to a viscosity average molecular weight (Mv) of the ultrahigh-molecular weight polyethylene powder. Formula I: Y=260.63X-0.484. Y: a polymer concentration. X: a molecular weight (Mv). Formula II: Y=338.69X-0.626. Y: a polymer concentration. X: a molecular weight (Mv). The ultrahigh-molecular weight polyethylene powder: 5-50 mass%. Liquid paraffin: 50-95 mass%.SELECTED DRAWING: Figure 1 【課題】金属石鹸由来の目ヤニ量を抑制し、金属石鹸の残渣量を抑制し、電池の安全性を向上できる、ポリエチレン樹脂組成物を提供する。【解決手段】超高分子量ポリエチレンパウダーと、金属石鹸を含有し、超高分子量ポリエチレンパウダーの粘度平均分子量が１００,０００～１０,０００,０００であり、所定の条件で二軸押出した際の、ストランド堆積物が、縦／横＝０．０５以上５．０以下である。＜二軸押出条件＞ポリマー濃度：超高分子量ポリエチレンパウダーの粘度平均分子量（Ｍｖ）に応じて、ポリマー濃度を式Ｉの値以上、式ＩＩの値以下に調整する。式Ｉ：Ｙ＝２６０．６３Ｘ－０．４８４Ｙ：ポリマー濃度、Ｘ：分子量（Ｍｖ）式ＩＩ：Ｙ＝３３８．６９Ｘ－０．６２６Ｙ：ポリマー濃度、Ｘ：分子量（Ｍｖ）超高分子量ポリエチレンパウダー：５～５０質量％、流動パラフィン：５０～９５質量％【選択図】図１