Adhesive films and adhesive film cartridges

A technology of adhesive film and adhesive layer, applied in the direction of adhesives, film/sheet adhesives, etc., can solve the problems of sufficient productivity and high cost, and achieve the effect of excellent coilability and surface smoothness

Active Publication Date: 2020-12-01
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a backing paper is used, not only the cost will increase accordingly, but also when the adhesive film is unrolled and released for use, a winding device for the backing paper is required, so it cannot be said that the productivity is sufficient.

Method used

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  • Adhesive films and adhesive film cartridges

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] For the base film, crystalline polypropylene (manufactured by Prime Polymer Co., Ltd., TF850H, MFR: 2.9 g / 10 minutes, ratio of isotactic pentads (mesopentad): 0.94) was supplied to a uniaxial melt extrusion Machine, melt extrusion at 240°C, use a 60μm threshold (cut) sintered filter to remove foreign matter, discharge it to the casting drum whose surface temperature is controlled at 30°C, and use an air knife to make it tightly bonded to the casting drum. Thereafter, compressed air at a temperature of 30° C. and a pressure of 0.3 MPa was sprayed onto the uncooled drum surface of the sheet on the casting drum to cool it, thereby obtaining an unstretched sheet. Next, this sheet was preheated to 140° C. using ceramic rolls, and stretched 4.6 times in the longitudinal direction of the film between rolls at 140° C. provided with a peripheral speed difference. Next, the ends are held by clips and introduced into a tenter-type stretching machine, preheated at 170°C for 3 secon...

Embodiment 2

[0105] In Example 1, except that the thickness of the adhesive layer was 1000 nm, the adhesive film was directly wound up for 1000 m by the same method as in Example 1 (without passing through a release film) to obtain an adhesive film tube. Although no wrinkling occurs when the tube is taken up, some air bites in. Table 1 shows the properties and evaluation results of the adhesive film.

Embodiment 3

[0107] In Example 1, the PET film (manufactured by Toray Co., Ltd., T60 (38 μm) was used as the base film, and the thickness of the adhesive layer was 300 nm. In addition, the same method as in Example 1 was used to directly bond the adhesive film ( In the case of not passing through the release film), it was wound up for 1000 m to make an adhesive film tube. Wrinkles, air bite, etc. did not occur when the tube was wound up, and the appearance was good. The physical properties and evaluation results of the adhesive film are shown in the table 1.

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Abstract

The present invention is an adhesive film in which an adhesive layer is provided on one side of the base film, the ten-point average roughness SRz of the back side of the base film (the surface not provided with the adhesive layer) is 3000 nm or less, and the thickness d of the adhesive layer is below 3000nm. The present invention provides an adhesive film that is excellent in surface smoothness, and also excellent in sliding properties, handling properties, and winding properties.

Description

technical field [0001] The present invention relates to an adhesive film that is excellent in surface smoothness, slidability, handleability, and rewindability, and is suitable for use as a surface protection film. Background technique [0002] Adhesive films that have adhesiveness to the surface of the adherend and can be peeled off without contaminating the adherend after use are used as packaging films, surface protection films, and processing films, and are attached to various mechanical products, Display panel components, synthetic resin panels, and substrates such as electrical appliances, components, etc., are widely used as protective films during processing, storage, transportation, and shipment. [0003] As such an adhesive film, the film which apply|coated the adhesive agent to the surface of a polyethylene terephthalate film etc. is described in patent document 1, 2, for example. Adhesive films such as those in Patent Documents 1 and 2, which are obtained by coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/20C09J201/00
CPCC09J201/00C09J7/20C09J7/243C09J7/255C09J2301/312
Inventor 久万琢也大仓正寿山中康平
Owner TORAY IND INC
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