Jsp Corporation

Takashi Nishimoto

Takeshi Aoki

Ryohei Takeuchi

Mikidai Fujita

Ryuichi Taniguchi

The multilayer foam sheet includes a polyethylene resin foam layer and a resin layer laminated on at least one of the two surfaces of the foam layer. The resin layer has a multilayer structure formed from a surface layer and an intermediate layer. Both the surface layer and the intermediate layer contain a polyethylene resin and a polymeric antistatic agent. The polymeric antistatic agent is contained in the intermediate layer at a proportion of 30-70 wt % (inclusive). The polymeric antistatic agent is contained in the surface layer at a proportion of at least 5 wt % to less than 30 wt %.

Polyethylene resin multilayer foam sheet, interleaving paper for glass plates, and method for manufacturing polyethylene resin multilayer foam sheet

A laminated foam sheet obtained by a coextrusion lamination method and having a polyethylene foam layer, and an antistatic layer laminated on at least one side of the foam layer. The antistatic layer contains a polyethylene resin, an ionomer resin and a polyalkylene glycol and has such specific morphology that the polyethylene resin forms a continuous phase and the ionomer resin forms small dispersed phases dispersed in the continuous phase.

Antistatic laminated foam sheet and process for producing same

A laminated foam interleaf sheet for being interposed between glass plates, having a foam layer of a polyethylene-based resin, and an antistatic layer which is laminated on each of both sides of the foam layer and contains a polyethylene-based resin, a polystyrene-based resin and a polymeric antistatic agent, the laminated foam interleaf sheet having a surface roughness Ra of 30 &#x3bc;m or less.

Laminated foam interleaf sheet for glass plates

Provided is a method for producing a polyethylene-based resin extruded foam sheet by extruding and foaming a foamable molten resin composition formed by kneading a mixture containing a low-density polyethylene, a physical blowing agent, and an antistatic agent, wherein the foam sheet has a thickness in a range of from 0.05 to 0.5 mm, and the antistatic agent is a polymeric antistatic agent having a melting point whose different from the melting point of the low-density polyethylene is in a range of from &#x2212;10 to +10&#xb0; C., and having a melt flow rate of 10 g/10 min or more. This method enables a novel polyethylene-based resin extruded foam sheet to be obtained that is of high quality such that formation of a small hole or a through-hole has been reduced or eliminated, and has both excellent strength and a shock-absorbing property despite a very small thickness even in medium- or long-term continuous production, and besides, exhibits a sufficient antistatic property, thus suitable as a glass plate interleaf sheet.

Method for producing polyethylene-based resin extruded foam sheet, polyethylene-based resin extruded foam sheet, and plate interleaf sheet using the same for glass sheets

A multi-layer foam sheet with an apparent density of 30 to 300 kg/mand a thickness of 0.05 to 2 mm, including a foam layer containing a polyethylene-based resin, and an antistatic layer fusion-laminated by coextrusion on each of both sides of the foam layer. The antistatic layer has a basis weight of 1 to 10 g/mand contains a polyethylene-based resin, a polystyrene-based resin, a styrenic elastomer, and a polymeric antistatic agent, with the polystyrene-based resin being contained in the antistatic layer in an amount of 15 to 70% by weight.

Multilayer foam sheet and interleaf sheet for glass plates

A method for producing a polyethylene-based resin laminated foam sheet according to the present invention is a method for producing a polyethylene-based resin laminated foam sheetwith thickness of 0.05 to 0.5 mm in which an anti-static layer is adhered by lamination on at least one surface of the foam layer, including: a step of performing coextrusion and foaming of a laminate which is obtained by combining and laminating, in a die, a melt resin compositionfor forming a foam layer obtained by kneading a low density polyethylene A and a physical foaming agent and a melt resin compositionfor forming an anti-static layer obtained by kneading a low density polyethylene B and an anti-static agent, wherein the anti-static agent is a polymeric anti-static agent C which has a melting point to allow a melting point difference in the range of from &#x2212;10&#xb0; C. to +10&#xb0; C. compared to that of the low density polyethylene B and has a melt flow rate of 10 g/10 minutes or more.

Method for producing polyethylene-based resin laminated foam sheet, polyethylene-based resin laminated foam sheet, and interleaf for glass plate using thereof

A multi-layer foam sheet with an apparent density of 30 to 300 kg/mand a thickness of 0.05 to 2 mm, including a foam layer containing a polyethylene-based resin (A), and an antistatic layer fusion-laminated by coextrusion on each of both sides of the foam layer. The antistatic layer has a basis weight of 1 to 10 g/mand contains a polyethylene-based resin (B), a polystyrene-based resin, a styrenic elastomer, and a polymeric antistatic agent, with the polystyrene-based resin being contained in the antistatic layer in an amount of 15 to 70% by weight.

Multi-layer foam sheet and interleaf sheet for glass plates

An extruded foam sheet having a foam layer constituted of a base resin containing low density polyethylene as a major component thereof, wherein the foam sheet has an apparent density of 45 to 450 kg/m, an average thickness of 0.03 mm or more and less than 0.3 mm and a dimensional change of &#x2212;5% to 0% in the extrusion direction when heated at 80&#xb0; C. for 24 hours and wherein cell walls of the foam layer have an average thickness of 6 to 70 &#x3bc;m. The foam sheet may be used as an interleaf sheet for glass plates.

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Utsunomiya, Japan

Takashi Nishimoto