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Foamed polyolefin resin sheet

A polyolefin resin and foamed sheet technology, applied in synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of weak rigidity, insufficient rigidity, and reduced loading efficiency, and achieve bending High elastic modulus, improved visibility, and excellent operability

Inactive Publication Date: 2014-03-19
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, compared with the conventional polyethylene resin foam sheet used in the packaging of general goods such as pottery, the polyolefin resin foam sheet in recent years has been somewhat improved in rigidity by utilizing the orientation of air cells, and is used as a lining for glass substrates. Paper, etc., but thin and light and strong rigidity are opposite characteristics, and it is not a sufficiently rigid polyolefin resin foam sheet that can satisfy both of them.
[0004] Specifically, a polyethylene resin foam sheet using a low-density polyethylene resin known as a cushioning material for packaging as a base resin with an expansion ratio of 15 to 40 times is light and has excellent cushioning properties, but has weak rigidity and Disadvantages of poor operability
In addition, although the rigid strength of the polyethylene resin foam sheet with a low-density polyethylene resin as the base resin and an expansion ratio of 5 to 15 times is improved, the rigid strength may not be sufficient depending on the application.
In addition, the rigidity of the polypropylene resin foam sheet with a foaming ratio of 5 to 15 times is stronger than that of the above-mentioned polyethylene resin foam sheet, but there are problems to be solved such as large uneven thickness of the foam sheet as a whole, If it is used as a backing paper for glass substrates, etc., there are disadvantages such as the loading height is too large and the loading efficiency is reduced.
In addition, a polypropylene resin foam sheet with an expansion ratio of 5 times or less or a foam sheet with rigidity and cushioning properties described in Patent Document 1 (a mixed resin containing a low-density polyethylene resin and a high-density polyethylene resin) Although the rigidity of the foamed sheet has been improved, it is not sufficient in terms of thinness, lightness, excellent cushioning and strong rigidity.

Method used

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  • Foamed polyolefin resin sheet
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2

[0118] Embodiment 1, 2, comparative example 1

[0119] As an extruder for polyolefin resin foam sheet formation, a tandem extruder consisting of a first extruder with a screw diameter of 90 mm and a second extruder with a screw diameter of 120 mm was used, and the second extrusion The outlet of the machine is equipped with a ring-shaped die with a lip diameter of 175 mm. Furthermore, in Examples 1 and 2, an annular die having a parallel mold clamping flat surface (part with the same interval between resin flow paths) with a length of 2 mm at the front end of resin extrusion was used, and in Comparative Example 1, no This is a conventional annular die in which the gap between the resin flow paths of the parallel clamping flat surface and the resin extrusion tip portion is gradually narrowed.

[0120] The polyolefin resin of the type and amount shown in Table 2 and the masterbatch of the foam regulator (foam regulator masterbatch) shown in Table 2 were supplied to the raw mater...

Embodiment 3～7、 comparative example 2～6

[0123] As an extruder for polyolefin resin foam sheet formation, a tandem extruder consisting of a first extruder with a screw diameter of 90 mm and a second extruder with a screw diameter of 120 mm was used as a polyolefin resin layer formation As an extruder, a third extruder having a screw diameter of 50 mm and L / D=50 was used. Furthermore, a ring die for coextrusion is connected to each outlet of the second extruder and the third extruder, and each molten resin can be laminated in the ring die.

[0124] The polyolefin resin of the type and amount shown in Table 2 and the masterbatch of the bubble regulator of the amount shown in Table 2 are supplied to the raw material inlet of the first extruder of the series extruder, heated and kneaded, and the formation is adjusted to about 200 ℃ molten resin mixture. Then, in this molten resin mixture, press the physical blowing agent of the amount shown in Table 2, then supply in the second extruder that is connected to the downstre...

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Abstract

PURPOSE: A foamed polyolefin resin sheet is provided to use in a container or glass substrate and to replace as a board alternative. CONSTITUTION: A foamed polyolefin resin sheet has 60-350 g / L of exterior density, 0.2-1.5 mm of thickness and 50-200 g / m^2. The number of foam in a thickness direction of the foamed sheet is 1-3. A polyolefin resin layer is laminated at least one side of the foamed sheet. 5-55 weight% of polymeric antistatic agent is mixed in the substrate resin with a resin layer.

Description

[0001] This application is a divisional application of the application dated June 25, 2010, the application number "201010214230.X", and the invention name "polyolefin resin foam sheet". technical field [0002] The present invention relates to a polyolefin resin foam sheet, and specifically relates to a polyolefin resin foam sheet that can be used as a backing paper (interleaf paper) for electronic precision instruments such as glass substrates, a spacer material for containers, and a substitute material for thick paper, etc. material. Background technique [0003] In recent years, foamed polyolefin resin sheets have been used as backing sheets for glass substrates incorporated into circuits. The foam sheet used in the backing paper needs to have excellent handleability without increasing the volume, so it is required to be thin, light, and excellent in cushioning, and at the same time, the amount of sagging when cantilevered (sheet holding ち) is small, that is, Strong rig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L23/00C08K3/34C08J9/12B32B27/06B32B27/18B32B27/32
CPCB32B27/08B32B27/18B32B27/32B32B2307/21B32B2323/043B32B2323/046C08J2205/00C08L23/06C08L2201/04C08L2203/14C08L2205/025C08L2207/062C08L2207/066
Inventor 森田和彦角田博俊秋山照幸
Owner JSP CORP
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