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Film roll

A film roll and protective film technology, applied in the direction of layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of increased manufacturing cost, the curled part cannot be well fitted, etc., to prevent curling Effect

Pending Publication Date: 2021-07-30
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, there is a problem that when bonding to other members, the curled portion cannot be bonded well and air bubbles are involved, or when the film is bonded while sucking, if the curl is strong, it becomes Cannot be sucked, peeled off from the suction part, an error occurs, and the device stops
In Patent Document 1, although a solution to reduce curl is proposed, this method is a method of sequentially biaxially stretching (that is, stretching in the longitudinal direction and then stretching in the transverse direction) after casting, which needs to be carried out during manufacture. Stretching work, resulting in increased manufacturing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0294] Hereinafter, the present invention will be described in further detail through examples. Unless otherwise stated, "%" and "part" in an example mean mass % and a mass part.

[0295] First, the measurement methods are collectively described.

[0296]

[0297] Gel Permeation Chromatography Assay

[0298] (1) Pretreatment method

[0299] Dissolve the sample in γ-butyrolactone to make a 20% by mass solution, then dilute it to 100 times with the eluent of N,N-dimethylformamide (sometimes described as DMF), and pass through a 0.45 μm membrane filter Filtration was performed, and the resulting solution was used as a measurement solution.

[0300] (2) Measurement conditions

[0301] Column: TSKgel SuperAWM-H×2+SuperAW2500×1 (inner diameter 6.0mm, length 150mm, 3 connections)

[0302] Eluent: DMF (added with 10mmol / L lithium bromide)

[0303] Flow: 0.6mL / min

[0304] Detector: RI detector

[0305] Column temperature: 40°C

[0306] Injection volume: 20μL

[0307] Molec...

manufacture example 1

[0340] Production example 1: Production of polyamideimide resin 1

[0341] Under a nitrogen atmosphere, a reaction vessel equipped with a stirring blade in a detachable flask and an oil bath were prepared. Into the reaction container installed in the oil bath, 45 parts of TFMB and 768.55 parts of DMAc were charged. While stirring the contents of the reaction vessel at room temperature, TFMB was dissolved in DMAc. Next, 19.01 parts of 6FDA was further injected into the reaction container, and the contents in the reaction container were stirred at room temperature for 3 hours. Then, 4.21 parts of OBBC were put into the reaction container, and then 17.30 parts of TPC were put into the reaction container, and the content in the reaction container was stirred at room temperature for 1 hour. Next, 4.63 parts of 4-picoline and 13.04 parts of acetic anhydride were further put into the reaction container, and the contents in the reaction container were stirred at room temperature for...

manufacture example 2

[0343] Production Example 2: Preparation of Silica Sol 1

[0344] A GBL-substituted silica sol was prepared by solvent substitution using an amorphous silica sol produced by the sol-gel method and having an average primary particle diameter of 27 nm measured by the BET method as a raw material. The obtained sol was filtered with a membrane filter having a mesh size of 10 μm to obtain GBL-substituted silica sol 1 . In the obtained GBL-substituted silica sol, the content of silica particles was 30% by mass.

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Abstract

The invention relates to a film roll. The present invention provides a method in which, even when a laminated film is conveyed and transported in a film roll form, there is no curl or there is little curl at the time of unwinding. The present invention provides a film roll formed by winding a laminated film and a protective film 1, the laminated film comprising an optical film containing a polyimide resin and / or a polyamide resin, and a functional cured resin layer laminated on the optical film; the protective film 1 is laminated on the opposite side of the cured resin layer to the optical film, and the film roll is wound in this order from the core side of the roll in the optical film, the cured resin layer, and the protective film 1.

Description

technical field [0001] The present invention relates to a film roll formed by winding a laminated film, especially a film roll which is less prone to curling when the laminated film is unwound. Background technique [0002] A laminated film in which an optical film made of polyimide resin and / or polyamide resin and a cured resin layer having a specific function is laminated has been used in various fields. For example, with the reduction in thickness, weight reduction and flexibility of displays of various image display devices, laminated films in which an optical resin film layer composed of polyimide resin and / or polyamide resin and a hard coat layer are laminated It has been used as a material to replace the glass used in the past. [0003] Usually, these laminated films are wound up on a core after manufacturing a laminated film, and are conveyed and conveyed as a film roll. Of course, when a laminated film is used, it is unwound from a film roll and used as a flat lam...

Claims

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Application Information

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IPC IPC(8): B32B27/28B32B27/34B32B27/36B32B27/08B32B7/12B32B7/06
CPCB32B27/281B32B27/34B32B27/36B32B27/08B32B7/12B32B7/06B32B2250/24B32B2307/306
Inventor 藤长将司西冈宏司
Owner SUMITOMO CHEM CO LTD