摘要:
A method for producing a multi-layer foam sheet having a foam layer and a resin layer laminated on at least one side of the foam layer includes coextruding a foamable molten resin composition which contains a low density polyethylene and a physical blowing agent and a molten resin composition which contains 80 to 20% by weight of a specific ethylene-propylene random copolymer and 20 to 80% by weight of a specific polyethylene resin so that the foamable molten resin composition forms the foam layer and the molten resin composition forms the resin layer.
摘要:
A method of producing a composite sheet having a foam layer of a first polyolefin-based resin and a surface layer of a second polyolefin-based resin provided on at least one side of the foam layer and containing a polymeric antistatic agent. The method includes coextruding through die a first melt containing the first polyolefin-based resin and a physical blowing agent and a second melt containing the second polyolefin-based resin, the polymeric antistatic agent and a volatile plasticizer to obtain the composite sheet. The amount of the polymeric antistatic agent is 4 to 100 parts by weight per 100 parts by weight of the second polyolefin-based resin and the amount of the volatile plasticizer is 5 to 50 parts by weight per 100 parts by weight of a total amount of the second polyolefin-based resin and the polymeric antistatic agent. The second polyolefin-based resin has a crystallization temperature of Ta [°C] and a melt viscosity of Ma [Pa·s], while the polymeric antistatic agent has a crystallization temperature of Tb [°C] and a melt viscosity of Mb [Pa·s], wherein Ta, Tb, Ma and Mb satisfy the following conditions: Tb Mb
摘要:
The present invention provides a transparency antistatic multilayer sheet prepared by extrusion sheet molding that is favorable in appearance and retains its antistatic action consistently, and a production method of producing a thick antistatic multilayer sheet reliably by extrusion sheet molding, while preventing generation of contamination of the polishing roll surface and also damage of the sheet appearance. Specifically, it relates to an antistatic multilayer sheet, comprising coat layers constituted of a transparent resin A, said coat layers substantively do not contain a polymeric antistatic agent, and at least one antistatic layer constituted of a transparent resin B and a polymeric antistatic agent, wherein the antistatic layer is in contact with the inside of the coat layer and the coat layers are placed on the outermost faces of the multilayer sheet, wherein the multilayer sheet has a distinctness of image of 60% or higher and an initial electrostatic potential in electrostatic half-life measurement of 2.5 kV or lower, and a production method thereof.
摘要:
The present invention provides a transparency antistatic multilayer sheet prepared by extrusion sheet molding that is favorable in appearance and retains its antistatic action consistently, and a production method of producing a thick antistatic multilayer sheet reliably by extrusion sheet molding, while preventing generation of contamination of the polishing roll surface and also damage of the sheet appearance. Specifically, it relates to an antistatic multilayer sheet, comprising coat layers constituted of a transparent resin A, said coat layers substantively do not contain a polymeric antistatic agent, and at least one antistatic layer constituted of a transparent resin B and a polymeric antistatic agent, wherein the antistatic layer is in contact with the inside of the coat layer and the coat layers are placed on the outermost faces of the multilayer sheet, wherein the multilayer sheet has a distinctness of image of 60% or higher and an initial electrostatic potential in electrostatic half-life measurement of 2.5 kV or lower, and a production method thereof.
摘要:
The present invention relates to a sheet or board like multiple layers laminated polyolefin foam having a plurality of polyolefin layers laminated on at least one side of a polyolefin foam by a coextrusion method. More specifically, the present invention relates to said multiple layers laminated polyolefin foam, wherein the thickness of the outermost layer constituting the plurality of polyolefin layers is 5 to 80 µm, and the density d (g/L) of the polyolefin foam, the melt flow rate X (g/10 min) of the polyolefin constituting the innermost layer among the plurality of polyolefin layers, and the thickness Y (µm) of the innermost layer of the multiple polyolefin layers satisfy the following relationships (1) to (4). Y ≦ 0.29dX 5 ≦ X ≦ 40 70 ≦ Y ≦ 300 100 ≦ d ≦ 300
摘要翻译:本发明涉及通过共挤出法在聚烯烃泡沫的至少一面上层叠有多个聚烯烃层的多层层压聚烯烃泡沫的片材或板。 更具体地,本发明涉及所述多层层压聚烯烃泡沫,其中构成多个聚烯烃层的最外层的厚度为5-80μm,聚烯烃泡沫的密度d(g / L), 构成多个聚烯烃层中最内层的聚烯烃的熔体流动速率X(g / 10min),多聚烯烃层的最内层的厚度Y(μm)满足以下关系式(1)〜( 4)。 Y = 0.29dX DF> 5 = X = 40 DF> 70 = Y = 300 DF> DF NUM =”(4)“> 100 = d = 300 DF>