RESIN COMPOSITION FOR EXPANDABLE LAMINATE, EXPANDABLE LAMINATE, METHOD FOR MANUFACTURING SAME, AND EXPANDED CONVERTED PAPER AND HEAT-INSULATING CONTAINER USING SAME
申请人:Japan Polyethylene Corporation
公开号:EP3238936A1
公开(公告)日:2017-11-01
The present invention provides a polyethylene resin composition for a foamable laminate which gives foamed cells having sufficient height and good appearance (foamed layer), even in the case of machining under high speed conditions at the time of extrusion lamination, a foamable laminate, a method for producing the same, a foamed converted paper, and a heat insulating container. The invention relates to a polyethylene resin composition for a foamable laminate, which is used for forming a polyethylene-based resin layer (I) for foaming on at least one side of a substrate mainly composed of paper, wherein the resin composition comprises a polyethylene-based resin (A) and satisfies the following properties (a-1) to (a-4):
(a-1) the melt flow rate (MFR) of the polyethylene-based resin (A) as measured in accordance with JIS K7210 (190°C, a load of 21.18N) is 7 g/10 minutes or more and less than 20 g/10 minutes,
(a-2) the density of the polyethylene-based resin (A) in accordance with JIS K7112 at a test temperature of 23°C is from 0.900 to 0.930 g/cm3,
(a-3) the oxygen induction time (OIT) at 180°C is 10 minutes or more and less than 190 minutes,
(a-4) the memory effect (ME) of the polyethylene-based resin (A) as measured using a melt indexer to be used in JIS K7210 and under conditions of a cylinder temperature of 240°C and a constant-rate extrusion output of 3 g/minute is less than 2.0.
本发明提供了一种用于可发泡层压板的聚乙烯树脂组合物,即使在挤压层压时在高速条件下进行加工的情况下,该组合物也能产生具有足够高度和良好外观(发泡层)的发泡单元、一种可发泡层压板、生产该层压板的方法、一种发泡转化纸和一种隔热容器。本发明涉及一种用于可发泡层压板的聚乙烯树脂组合物,该组合物用于在主要由纸构成的基材的至少一面上形成用于发泡的聚乙烯基树脂层 (I),其中树脂组合物包括聚乙烯基树脂 (A),并满足以下特性 (a-1) 至 (a-4):
(a-1) 根据 JIS K7210(190°C,载荷 21.18N)测量,聚乙烯基树脂(A)的熔体流动速率 (MFR)为 7 克/10 分钟或以上,且小于 20 克/10 分钟、
(a-2) 根据 JIS K7112,在试验温度为 23℃时,聚乙烯基树脂(A)的密度为 0.900 至 0.930 克/立方厘米、
(a-3) 氧气诱导时间(OIT)在 180°C 时为 10 分钟或以上且少于 190 分钟、
(a-4) 聚乙烯基树脂(A)的记忆效应(ME)是使用 JIS K7210 所使用的熔融指数仪,并在料筒温度为 240 摄氏度,恒速挤出量为 3 克/分钟的条件下测得,小于 2.0。