Pressure-sensitive adhesive film

A technology of adhesive film and adhesive layer, which is applied in the direction of adhesives, film/sheet adhesives, adhesive products, etc., can solve problems such as insufficient performance, and achieve excellent processing adaptability, less adhesion, and excellent viscosity Effect

Active Publication Date: 2011-04-13
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the film is also not sufficient in terms of performance

Method used

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  • Pressure-sensitive adhesive film
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] (Production of base material layer)

[0123] use A uniaxial extruder (L / D: 22.4) melt-extruded a homopolypropylene resin (manufactured by Sumitomo Chemical Co., Ltd.: FLX80E4, tensile modulus of elasticity: 1500 MPa) 100 wt% to form a substrate layer.

[0124] (Production of adhesive layer)

[0125] use A biaxial extruder (L / D: 19) melted and extruded 100 wt% of an olefin-based elastomer (Mitsubishi Chemical Corporation: ZEALOUS MC707) as an adhesive layer.

[0126] (Production of release layer)

[0127] use A single-screw extruder (L / D: 25) melt-extruded 100% by weight of a propylene-ethylene block copolymer (manufactured by SunAllomer: PC480A) as a release layer.

[0128] (Making of film)

[0129] Three-layer T-die (multi-manifold type, die lip width 250mm, die lip gap 1mm) at 250°C with the base layer, adhesive layer, and release layer being melted in each extruder. Laminated extrusion is implemented inside. While blowing air to a casting roll with a temperature of 20°C wit...

Embodiment 2

[0132] The base layer and the release layer were the same as in Example 1, and the adhesion layer and the ratio of each layer were changed to the following contents, and three types of three-layer unstretched films were obtained by the same manufacturing method as in Example 1.

[0133] (Adhesive layer)

[0134] Amorphous PP (manufactured by Sumitomo Chemical: Tafthren H3522A, heat of crystallization and crystallization: 28J / g) and homopolypropylene resin (manufactured by Sumitomo Chemical: FLX80E4, tensile modulus of elasticity: 1500 MPa) Mix at a ratio of 20% by weight, and use the mixture A twin-screw extruder (L / D: 19) was melt-extruded as an adhesive layer.

[0135] (Making of film)

[0136] Three-layer T-die (multi-manifold type, die lip width 250mm, die lip gap 1mm) at 250°C with the base layer, adhesive layer, and release layer being melted in each extruder. Laminated extrusion is implemented inside. While blowing air to a casting roll with a temperature of 20°C with a blow...

Embodiment 3

[0139] The base layer and the release layer were the same as in Example 1, and the layer ratio of the adhesive layer and each layer was changed to the following content, and three types of three-layer unstretched films were obtained by the same manufacturing method as in Example 1.

[0140] (Adhesive layer)

[0141] Amorphous PP (manufactured by Sumitomo Chemical: Tafthren H3522A, heat of crystallization and crystallization: 28J / g) and propylene-1-butene copolymer (manufactured by Sumitomo Chemical: SPX78J1, tensile modulus: 530MPa) Mix in the ratio of 80 / 20wt%, use A biaxial extruder (L / D: 19) melted and extruded the mixture as an adhesive layer.

[0142] (Making of film)

[0143] Three-layer T-die (multi-manifold type, die lip width 250mm, die lip gap 1mm) at 250°C with the base layer, adhesive layer, and release layer being melted in each extruder. Laminated extrusion is implemented inside. While blowing air to the casting roll with a temperature of 20°C with a blower, the extru...

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Abstract

A pressure-sensitive adhesive film which is a stretched polypropylene-based resin film comprising a laminate consisting of a pressure-sensitive adhesive layer and a release layer provided on the surface of a base layer of a polypropylene-based resin, characterized in that the average surface roughness (SRa) of the surface of the above-described release layer is 0.200 [mu]m or less, the average surface layer (SRa) of the surface of the pressure-sensitive adhesive layer of the above-described film is 0.030 [mu]m or less, the contact area with the adherent, which is defined in the description, is 90% or more but not more than 100%, and the film haze falls within the range of 1 to 40%. This pressure-sensitive adhesive film suffers from little blocking and shows a good processing suitability even after storing in a rolled state. Further, this film shows little bubbling and a high transparency after bonding to an adherend and processing at a high temperature.

Description

Technical field [0001] The invention relates to an adhesive film. The adhesive film of the present invention can be used to protect the surface of the article from dust adhesion or damage by sticking it on the surface of articles such as synthetic resin boards, decorative laminates, metal plates, and painted steel sheets. It is used as a surface protective film that affects, and it is particularly preferably used as a surface protective film when soldering a printed circuit board. The term "adhesive film" in the present invention also refers to an adhesive sheet or an adhesive tape. Background technique [0002] At present, adhesive films for the purpose of surface protection of coatings are generally used in the processing, storage, and transportation of building materials, electrical, electronic products, and automobiles. Such adhesive films must have good adhesiveness and be used after use. It is easy to peel off in a state where the adhesive does not pollute each surface. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B32B25/08B32B27/00B32B27/32C09J7/22C09J7/38
CPCC09J7/0253B32B7/12C09J2453/005C09J2423/16C09J7/0246B32B27/32C09J7/0275C09J2423/106B32B7/06B32B25/08B32B25/14B32B27/08B32B27/18B32B2250/24B32B2270/00B32B2307/412B32B2307/50B32B2307/538B32B2307/702B32B2307/704B32B2307/744B32B2307/748B32B2405/00C09J7/38C09J7/22C09J7/203C09J7/243Y10T428/24355C09J7/403B32B27/00C09J9/00C09J123/00C09J2301/312
Inventor 井川孝志大野真一松田明今井彻西忠嗣
Owner TOYOBO CO LTD
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