Spacing sheet for glass substrate

A technology of glass substrate and backing paper, which is applied in the direction of packaging paper, internal frame, flexible covering, etc., can solve the problems of thickness restriction, and achieve the effect of preventing damage, excellent performance, and small sagging

Active Publication Date: 2008-10-08
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also conceivable to increase the thickness, but as mentioned above, since the foamed sheet that is expected to be used as a backing paper is an extremely thin foamed sheet, there are also restrictions on the thickness of the sheet.

Method used

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  • Spacing sheet for glass substrate
  • Spacing sheet for glass substrate
  • Spacing sheet for glass substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] As the extruder for foam seat|seet manufacture, the single extruder which attached the ring die to the extruder exit of diameter 150mm was used.

[0111] 3.0 parts by weight of a masterbatch of a foam regulator is mixed with 100 parts by weight of a polyethylene-based resin and a polymer-type antistatic agent in a ratio shown in Table 1. In the mouth, heating and kneading were performed to obtain a resin melt adjusted to about 200°C. A mixed butane of 70% by weight of n-butane and 30% by weight of isobutane as a physical blowing agent was pressed into the resin melt to make it 14.6 parts by weight relative to 100 parts by weight of the base resin, Then, cooling was performed to obtain a foamable resin melt, and the foamable resin melt was extruded into a cylindrical shape from a ring die and foamed. The extruded cylindrical foam was cooled and cut while being pulled along the cylinder to obtain foam sheets.

Embodiment 2、3、 comparative example 2～4

[0113] A foam seat was obtained in the same manner as in Example 1 except having used a tandem extruder including two extruders with a diameter of 115 mm and a diameter of 180 mm, except that the base resin and production conditions shown in Table 1 were changed.

Embodiment 4

[0114] Embodiment 4, comparative example 1

[0115] A foam seat|seet was obtained similarly to Example 1 except having used the single extruder of diameter 115mm as an extruder, and having changed the base material resin and manufacturing conditions shown in Table 1.

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PUM

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Abstract

To provide a spacing sheet interposed between glass substrates, comprising a foamed sheet which is stiff enough in spite of being thin and lightweight and is excellent in surface protecting performance. The spacing sheet for glass substrates comprises a polyolefin resin extrusion-foamed sheet of a thickness of 0.3 to 1.5 mm and an apparent density of 18 to 180 g / L, wherein the foamed sheet contains 5 to 30 pts.wt., per 100 pts.wt. polyolefin resin, polymeric antistatic agent, the base resin of the foamed sheet has melt tension of 3 to 40 cN and a melt mass flow rate of 0.2 to 10 g / 10 min, and the foamed sheet has a cell count of 4 to 10 / mm in the thickness direction, a cell flatness of 0.1 to 0.6, a centerline average roughness on the surface of 25 [mu]m or lower, and a surface resistivity (after ultrasonic cleaning in ethanol) of 1*10<8>to 1*10<14>([Omega]).

Description

technical field [0001] The present invention relates to a paper for glass substrates, and more particularly to a paper to be sandwiched between glass substrates when a plurality of glass substrates used in glass panels for various image display devices are stacked and packaged. Background technique [0002] In recent years, glass substrates have been used as glass panels for various image display devices such as liquid crystal displays, plasma displays, and electroluminescence displays. At this time, since a plurality of glass panels for a display are produced from a single glass substrate, the size of the glass substrate is also increased along with the increase in size of the display. [0003] The above-mentioned large-sized glass substrate has a thickness as thin as about 0.7 mm and is easily broken, so strict packaging and packaging are required. In addition, when packaging and packing glass substrates, it is required to prevent the surface of the glass from being pollu...

Claims

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Application Information

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IPC IPC(8): C08J9/00C08L23/00B65D57/00B65D65/02B65D85/48
CPCB29C48/0012B29C48/08B65D57/002C03B40/033C08J5/18C08J9/0004C08J9/228C08J2323/06C08L23/06C08L2201/04C08L2666/86
Inventor 石川光一青木健石井秀树西本敬室井崇
Owner JSP CORP
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