Unlock instant, AI-driven research and patent intelligence for your innovation.

Manufacturing method of optical film roll

A manufacturing method and optical film technology, applied in the directions of winding strips, thin material handling, transportation and packaging, etc., can solve the problems of resin film end face deviation, resin film deformation, etc.

Active Publication Date: 2016-12-28
KONICA MINOLTA INC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Such a tape-shaped resin film (film roll) wound in a roll shape may cause problems such as deviation of the end face of the wound resin film or deformation of the resin film in the wound state.
In addition, the generation of such a problem becomes more remarkable as the resin film becomes wider and more tape-shaped.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Manufacturing method of optical film roll
  • Manufacturing method of optical film roll
  • Manufacturing method of optical film roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0232] In Example 1, as the resin film, an optical film usable as a polarizer protective film was used. Specifically, the following triacetate cellulose film was used.

[0233] (Preparation of silica dispersion)

[0234] The preparation of the silica dispersion liquid added to the dope will be described.

[0235] First, 10 parts by mass of silicon dioxide (AEROSIL R812 manufactured by Japan Aerosil Co., Ltd., the average diameter of primary particles is 7 nm) and 90 parts by mass of ethanol were stirred and mixed with a dissolver for 30 minutes, and then dispersed using a Manton-Gaulin disperser. Prepare the dispersion.

[0236] Then, 88 parts by mass of dichloromethane was added to a dissolving tank, and while the dichloromethane was fully stirred, the dispersion liquid prepared above was slowly added, and stirred and mixed for 30 minutes with a dissolver. The obtained dispersion liquid was filtered with a microparticle dispersion diluent filter (manufactured by Advantec T...

Embodiment 2

[0249] In place of TAC1 used in Example 1, a film (TAC3) produced so as to have the same composition as TAC1 and a thickness of 40 μm was used, and the same procedure as in Example 1 was used.

Embodiment 3

[0251] In place of TAC1 used in Example 1, a film (TAC2) manufactured so as to have the same composition as TAC1 and a thickness of 30 μm was used, and the same procedure as in Example 1 was used.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

One aspect of the present invention is an optical film roll manufacturing method which comprises a step of manufacturing a resin film in an elongated shape having an embossed portion on both widthwise edges along the longitudinal direction, and a winding step of winding the resin film into a roll on a winding core, wherein the winding step comprises a vibration winding step of winding the resin film onto the winding core while periodically vibrating the resin film and / or the winding core in the width direction of the resin film such that the area enclosed by f(x) and the x-axis thereof is larger than the area enclosed by a sine-wave vibration a(x) that has the same amplitude and period as f(x) and the x-axis and is smaller than the area enclosed by a square wave vibration b(x) that has the same amplitude and period as f(x) and the x-axis, wherein in f(x) the x-axis is the accumulated thickness of the wound resin film and the y-axis is the widthwise distance between the centers of the resin film and the winding core.

Description

technical field [0001] The invention relates to a method for manufacturing an optical film roll. Background technique [0002] Resin films are used in various fields such as liquid crystal display devices in view of their chemical properties, mechanical properties, electrical properties, and the like. Specifically, in the image display region of the liquid crystal display device, various resin films, for example, a transparent protective film for protecting a polarizing element of a polarizing plate, and the like are arranged. As such a resin film, resin films excellent in translucency, such as a cellulose ester film, can be used, for example. [0003] Such a resin film is generally produced as a strip-shaped resin film by a solution casting film forming method, a melt casting film forming method, etc., and is used for storage and storage in a state wound on a winding core (winding core) in a roll shape. delivery. Moreover, when using a resin film, a resin film is sent ou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B65H18/10B65H18/28
CPCB65H23/0328B65H2515/50B65H2701/1752B65H2801/61
Inventor 岩上直矢
Owner KONICA MINOLTA INC