Method for producing longitudinal adhesive film, method for producing film, and method for producing polarizing plate having non-polarizing portion
A manufacturing method and technology for polarizers, which are applied in the directions of film/sheet adhesives, films/sheets without carriers, polarizing elements, etc., can solve problems such as residual research matters, and achieve low cost, high processing efficiency, and suppression of The effect of quality deviation
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Embodiment 1
[0108] A vertically elongated laminate (width: 1200 mm, length: 43 m) having a structure of lipid-based film (38 μm in thickness) / adhesive layer (5 μm in thickness) / separator (25 μm in thickness) was prepared. A carrier film (width: 1200 mm, length: 43 m) having a structure of lipid film (thickness: 38 μm) / adhesive layer (thickness: 5 μm) was adhered to the lipid-based film surface of the laminate by roll-to-roll, A laminate with a carrier film was produced.
[0109] Next, a cutting blade was cut into the laminate with a carrier film to a depth of 80 μm from the surface of the separator using a punching device, and the carrier film was half-cut into a circular shape with a diameter of 2.4 mm so that the carrier film did not pass through. Half-cuts were performed at intervals of 250 mm in the longitudinal direction and at intervals of 400 mm in the width direction.
[0110]Next, the carrier film was peeled off from a laminated body, and the adhesive film was obtained.
Embodiment 2
[0112] In addition to using a laser cutting machine (CO 2 An adhesive film was obtained in the same manner as in Example 1, except that a laser, wavelength: 9.4 μm, power: 10 W) was half-cut (cut depth: 80 μm) instead of the punching device.
[0113] The following evaluations were performed on each Example.
[0114] 1. Perforation debris
[0115] It was confirmed whether or not the perforation debris generated by dicing was removed when the carrier film was peeled off.
[0116] 2. Adhesive appearance of the adhesive film
[0117] The separator was peeled off, the adhesive film was bonded to a commercially available polarizing plate, and the external appearance was observed with a microscope.
[0118] In various embodiments, the perforation debris generated by the half cutting was completely removed upon peeling of the carrier film.
[0119] The obtained adhesive film was adhered to a polarizing plate, and the bonding state between the polarizing plate and the adhesive film...
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Abstract
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