Surface protection sheet

A technology of protective sheet and substrate layer, applied in the direction of film/sheet-like adhesives, adhesives, etc., can solve the problems of increased adhesive force, high adhesive force, insufficient weather resistance of the surface protective sheet, etc. The effect of suppressing the increase in adhesive strength and sufficient weather resistance

Inactive Publication Date: 2013-08-21
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the adhesive strength of the conventional surface protection sheet to the adherend is not high enough in the pasted state
Therefore, when processing an adherend to which a conventional surface protection sheet is attached, a part of the surface protection sheet may be peeled off.
[0004] In addition, the conventional surface protection sheet has the problem that the adhesive force when peeling off the adherend after sticking is too high, and it is difficult to easily peel off the adherend with a slight force.
[0005] Furthermore, the conventional surface protection sheet has the following problems: under the environmental load of long-term storage exposed to relatively high temperature, the adhesive force is greatly increased, and the peelability when peeling from the adherend is deteriorated.
[0006] In addition, the existing surface protection sheet does not have sufficient weather resistance, and when it is used outdoors or stored at high temperature, the adhesive force increases greatly over time, and the peelability when peeled from the adherend deteriorates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Compared to low-density polyethylene (manufactured by Tosoh, trade name: Petrothene 186R, density = 0.924 g / cm 3 ), white pigment (titanium oxide, manufactured by Dupont, trade name: Ti-Pure R103), ultraviolet absorber (UVA, manufactured by BASF, trade name: Tinuvin326), hindered amine light stabilizer (HALS , manufactured by BASF, trade name: Tinuvin 783), and a white-colored layer-forming material was obtained.

[0119] Next, with respect to the low-density polyethylene (manufactured by Tosoh, trade name: Petrothene186R, density=0.924g / cm 3 ) 85% by weight and linear low-density polyethylene (manufactured by Sumitomo Chemical, trade name: ExcellenFX FX307, density=0.890g / cm 3 ) 10% by weight of a resin mixture, and 5% by weight of carbon black MB (manufactured by Sumika Color, trade name: Black SPEMB-865, carbon content 20%) was blended to obtain a black layer forming material.

[0120] Furthermore, 82% by weight of SEBS (hydrogenated SEBS, styrene content = 15% by ...

Embodiment 2

[0124]As shown in Table 1, the composition of the white-colored layer-forming material was changed, except that, it was carried out in the same manner as in Example 1 to obtain a surface protection sheet (2) ( Thickness: white color layer / black color layer / adhesive layer=20μm / 35μm / 5μm).

[0125] The results are shown in Table 1.

Embodiment 3

[0127] As shown in Table 1, the compounding of the white-colored layer forming material was changed, except that, it was carried out in the same manner as in Example 1 to obtain a surface protection sheet (3) of a three-layer structure (white-colored layer / black-colored layer / adhesive layer). Thickness: white color layer / black color layer / adhesive layer=20μm / 35μm / 5μm).

[0128] The results are shown in Table 1.

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Abstract

The invention provides a surface protection sheet, which comprises a substrate layer and a bonding layer, wherein, in the pasting paste of the body to be adhered, the bonding force is appropriate and strong enough, on the other hand, the bonding force for peeling the body to be adhered after pasting is appropriate, accordingly, the product can be peeled from the body to be adhered by easily applying a slight force, furthermore, rise of the bonding force can be inhibited at high temperature in the long-term preservation environment case with load, further, the product has a fully weatherability. The surface protection sheet of the present invention comprises the substrate layer and the bonding layer, wherein, the substrate layer and the bonding layer are shaped by coextrusion for forming one body; when the stretching speed is 0.3 m / min, the initial bonding force P relative to SUS 430 BA board is 2.0 N / 20 mm for 180-degree peeling, and when the stretching speeds are 0.3 m / min, 1 m / min, 10 m / min and 30 m / min, the maximum initial bonding force Q (N / 20 mm) is below 150% of P relative to SUS 430 BA board for 180-degree peeling.

Description

technical field [0001] The present invention relates to a surface protection sheet. Specifically, the present invention relates to a surface protection sheet including a base material layer and an adhesive layer. The surface protection sheet of the present invention is used, for example, in transporting, processing or maintaining metal plates, painted plates, aluminum alloy frames, resin plates, decorative steel plates, vinyl chloride laminated steel plates, glass plates and other components, polarizing films, optical components such as liquid crystal panels, Electronic parts, etc., can be used for pasting on the surface of these for protection. Background technique [0002] The surface protection sheet is usually provided with an adhesive layer on one side of the substrate layer. As a method of producing a surface protection sheet including such a base material layer and an adhesive layer, a method of integrally forming the base material layer and the adhesive layer by co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J153/02
Inventor 生岛伸祐山户二郎武田公平
Owner NITTO DENKO CORP
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