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Base material for surface protective sheet and surface protective sheet

A technology for protecting sheets and substrates, applied in film/sheet-like adhesives, transportation and packaging, thin material processing, etc., can solve the problems of poor anti-blocking properties of surface protection sheets, and prevent surface roughening and adhesion. Small degree of deterioration in property, effect of suppressing scratches

Inactive Publication Date: 2011-09-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface protection sheet has poor blocking resistance because ethylene-vinyl acetate copolymer is a soft resin

Method used

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  • Base material for surface protective sheet and surface protective sheet
  • Base material for surface protective sheet and surface protective sheet
  • Base material for surface protective sheet and surface protective sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] By adding 2 parts by weight of cross-linked polymethyl methacrylate fine particles having an average particle diameter of 10 μm (made by JX Nippon Oil Co., Ltd.) to 100 parts by weight of linear low density polyethylene (Evolue SP2520 manufactured by Prime Polymer Co., Ltd.) & Energy Corporation Uni-Powder NMB-1020) was formed into a sheet by an inflation method at a mold temperature of 200°C. Thus, a base material for a surface protection sheet was prepared. The thickness of the substrate used for the surface protection sheet was 60 μm.

[0110] After that, one surface of the obtained base material for a surface protection sheet was subjected to corona treatment.

[0111] Next, 3 parts by weight of an isocyanate-based crosslinking agent (Coronate L manufactured by Nippon Polyurethane Industry Co., Ltd.) was added to 100 parts by weight of an acrylic pressure-sensitive adhesive (having a weight of 600,000 in terms of polystyrene). average molecular weight) of ethyl ac...

Embodiment 2

[0115] By adding 1 part by weight of crosslinked polystyrene fine particles having an average particle diameter of 8 μm (TECHPOLYMER SBX- 8) The obtained product is prepared as a raw material for the substrate layer (A).

[0116] Polypropylene (WINTECWFX4 manufactured by Japan Polypropylene Corporation) was prepared separately as a raw material for the base material layer (B).

[0117] The base layer (A) and the base layer (B) were co-extruded into two layers at a mold temperature of 220° C. by a T-die method. Thus, a two-layer base material for a surface protection sheet was prepared. The base material layer (A) had a thickness of 10 μm, and the base material layer (B) had a thickness of 50 μm.

[0118] After that, the substrate layer (B) surface side of the resulting two-layer substrate for a surface protection sheet was subjected to corona treatment.

[0119] Next, a styrene-isobutylene-styrene block copolymer (SIBSTAR 072T manufactured by KANEKA CORPORATION) was dissolv...

Embodiment 3

[0123] By adding 5 parts by weight of cross-linked polymethyl methacrylate fine particles (TAFTIC manufactured by TOYOBO Co., Ltd.) The product obtained from FHS-005) is prepared as a raw material for the substrate layer (A).

[0124] Polyethylene (Petrocene 204 manufactured by TOSOH CORPORATION) was prepared separately as a raw material of the base material layer (B).

[0125] In addition, by adding 30 parts by weight of petroleum resin (Clearon manufactured by YASUHARA CHEMICAL CO., LTD.) to 100 parts by weight of styrene-ethylene-butylene-styrene block copolymer (Tuftec H1221 manufactured by Asahi Kasei Chemicals Corporation), P-125) obtained product, which is prepared as a raw material for a pressure-sensitive adhesive layer.

[0126] The base material layer (A), the base material layer (B) and the pressure-sensitive adhesive layer were subjected to three-layer coextrusion molding at a mold temperature of 200° C. by a T-die method. Thus a surface protection sheet (3) was...

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Abstract

Provided is the following base material for a surface protective sheet. The slipping property of the back surface of the sheet is moderately excellent, and scratches in the surface of an adherend laminated to contact the back surface of the sheet can be suppressed. Also provided is a surface protective sheet containing such base material for a surface protective sheet. The base material for a surface protective sheet of the present invention is a base material for a surface protective sheet including a base material layer (A) , in which at least one surface of the base material for a surface protective sheet is the surface of the base material layer (A); the base material layer (A) contains a polyolefin-based resin as a main component; the base material layer (A) contains polymer fine particles having an average particle diameter of 3 to 20 mum at a content of 0.1 to 20 wt% with respect to 100 parts by weight of the polyolefin-based resin; the surface of the base material layer (A) has a surface roughness Ra of 0.15 to 0.60 mum; the surface of the base material layer (A) has a coefficient of dynamic friction (I) with respect to an aluminum plate of 0.35 to 1.00.

Description

technical field [0001] The present invention relates to a base material for a surface protection sheet, and to a surface protection sheet. Background technique [0002] Many attempts have been conventionally made to protect the surface of a metal plate, such as a stainless steel plate, an aluminum plate, and a steel plate, by temporarily attaching a surface protective sheet during processing, transportation, etc. of the metal plate to prevent the surface of the metal plate from being scratched ( traces), etc. Each surface protection sheet obtained by providing one surface of a base film with a pressure-sensitive adhesive layer has been used as such a surface protection sheet for a metal plate. Vinyl chloride-based substrates have conventionally been the mainstream of the substrate for any such surface protection sheet. In recent years, however, vinyl chloride has begun to be abandoned from the standpoint of environmental protection, and thus applications to polyolefin-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08L33/12C08L33/08C08L33/10C08L25/06C08L23/08C08L23/06C09J7/02
CPCC08K7/16C09J2433/006C09J2425/006C08L23/06C09J7/0275C09J2205/106C08G18/6229C08L33/12C08L2205/22C09J7/243C09J2301/41Y10T428/24893
Inventor 林圭治花木一康内田翔山户二郎武田公平泽﨑良平
Owner NITTO DENKO CORP
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