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Polyolefin resin laminated foam sheet

A polyolefin resin and foam sheet technology, which is applied in the field of polyolefin resin laminated foam sheets, can solve problems such as cracks, holes, and difficulty in obtaining laminated foam sheets with uniform thickness. Achieve the effects of beautiful surface, excellent thermoformability, and excellent static dissipative properties

Active Publication Date: 2015-03-25
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] An attempt was made to co-extrude the melt of the antistatic resin composition containing a large amount of polymer antistatic agent and the melt of the foamable resin described in Patent Document 3 by using a ring die to make the resin layer containing the antistatic agent Forming the surface to prepare a laminated foamed sheet, as a result, holes and cracks are generated on the resin layer, making it difficult to obtain a laminated foamed sheet with a resin layer of uniform thickness

Method used

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  • Polyolefin resin laminated foam sheet
  • Polyolefin resin laminated foam sheet
  • Polyolefin resin laminated foam sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、7、9、10、14、15

[0123] Embodiment 1~5, 7, 9, 10, 14, 15, comparative example 1, 3~5

[0124] As an extruder for preparing a polypropylene-based resin foam layer of a laminated foam sheet, a tandem extruder composed of two extruders with an inner diameter of 90 mm and an inner diameter of 120 mm was used as an extruder for preparing an antistatic As the layer extruder, an extruder with an inner diameter of 40 mm was used, and an annular die with a diameter of 100 mm was used for laminating and co-extruding the foamed polypropylene resin layer and the antistatic layer.

[0125]First, in order to form a polypropylene-based resin foam layer, 0.5 parts by weight of a foam regulator (Japan Polypropylene Co., Ltd. Boehringer Ingelheim Co., Ltd., PO217K, mixed with sodium bicarbonate and sodium citrate), supplied to the raw material inlet of an extruder with an inner diameter of 90 mm, heated and kneaded to form a molten resin mixture prepared at about 200°C, Into this molten resin mixture, carbon d...

Embodiment 6

[0129] In order to make the lamination amount of the antistatic layer 10g / m2 2 , except that the discharge rate of the antistatic molten resin was 3.5 kg / hr, it was the same as in Example 1 to obtain a laminated foam sheet. The overall thickness of the laminated foam sheet is 2.0mm, and the weight per unit area is 580g / m 2 , the apparent density is 0.29g / cm 3 . The physical properties of the laminated foam sheet are shown in Table 4.

Embodiment 8

[0131] In order to make the lamination amount of the antistatic layer 150g / m2 2 , except that the discharge rate of the antistatic molten resin was 52.5 kg / hr, it was the same as in Example 1 to obtain a laminated foam sheet. The overall thickness of the laminated foam sheet is 2.3mm, and the weight per unit area is 860g / m 2 , the apparent density is 0.38g / cm 3 . The physical properties of the laminated foam sheet are shown in Table 4.

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Abstract

The present invention is a laminated foam sheet obtained by performing lamination using a co-extrusion method in which an annular die is used, such that at least one surface of a polyolefin resin foam layer has an anti-static layer as a surface layer; the anti-static layer comprising no less than 25 wt% to less than 70 wt% of a thermoplastic resin and more than 30 wt% to no more than 75 wt% of a polymeric antistatic agent (the sum of both being 100 wt%), the melt viscosity of the anti-static layer at 190°C and a shear rate of 100s-1 being 250 Pa·s or higher, the laminated amount of the anti-static layer being a basis weight of 5 g / m2 or more per side of the foam layer, and the initial static voltage when 10 kV is applied to the anti-static layer surface for 30 seconds being 50V or less. The laminated foam sheet exhibits exceptional static electricity dissipation performance and has exceptional heat moldability.

Description

technical field [0001] The present invention relates to a polyolefin resin laminated foam sheet, in particular to a polyolefin resin laminate foam sheet with extremely high antistatic properties, the polyolefin resin laminate foam sheet An antistatic layer is laminated on at least one side thereof. Background technique [0002] Conventionally, foamed polyolefin resin sheets have been widely used in various containers, transport boxes, storage boxes, and the like. However, polyolefin resin foam sheets are prone to static electricity and dust. Therefore, when using a polyolefin-based resin foam sheet in a field requiring antistatic properties, it is necessary to add various antistatic agents to impart antistatic properties before use. [0003] Antistatic agents include low-molecular-weight antistatic agents and high-molecular-weight antistatic agents. As low-molecular-weight antistatic agents, there are fatty acid monoglycerides, sodium alkylbenzene sulfonate, etc., but they...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C51/14B32B5/18B32B27/18B29K23/00B29K105/04B29L9/00B29C48/05B29C48/09
CPCB29K2105/0008B29C51/14B29C47/065B29K2023/12B32B2457/00B29C44/22B32B2605/00B32B2266/025B29C47/0021B32B2605/003B32B27/18B29C47/20B29K2023/00B29K2105/04B32B27/32B29C48/08B29C48/21B29C48/32B29C48/05B29C48/09B32B5/18
Inventor 森田和彦室井崇谷口隆一
Owner JSP CORP