Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Release film

A release film and release agent technology, which is applied in the direction of film/sheet adhesives, synthetic resin layered products, coatings, etc., can solve the problem of insufficient adhesion between the release layer and the antistatic layer

Active Publication Date: 2020-11-10
MITSUBISHI CHEM CORP
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The other side of the antistatic film described in this document is that the antistatic property is good. When a release layer is provided on the antistatic layer, the adhesion between the release layer and the antistatic layer may not be sufficient.

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
  • Release film
  • Release film
  • Release film

Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0082] As a specific manufacturing example of a urethane resin, the method using the reaction of a hydroxyl group and an isocyanate is mentioned, for example. As the hydroxyl group used as a raw material, a polyol is suitably used, and examples thereof include polyether polyols, polyester polyols, polycarbonate polyols, polyolefin polyols, and acrylic polyols. These compounds may be used alone or in combination.

[0083] Examples of polyether polyols include polyethylene glycol, polypropylene glycol, polyethylene propylene glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol, and the like.

[0084] Examples of polyester polyols include polycarboxylic acids (malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, fumaric acid, maleic acid, terephthalic acid, isophthalic acid, etc.) or their anhydrides and polyols (ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropyl...

Embodiment 1A

[0182] The above-mentioned polyester (1) is supplied as a raw material to an extruder with a vent hole, and after being melt-extruded at 290°C, it is carried out on a cooling roll with a surface temperature set at 40°C using an electrostatic application method. After cooling and solidification, an amorphous film with a thickness of about 550 μm was obtained.

[0183] The film was stretched 3.7 times in the longitudinal direction at 85° C., 3.9 times in the transverse direction at 100° C., and heat-treated at 210° C. to obtain a biaxially stretched polyester film with a thickness of 38 μm.

[0184] Use the reverse gravure coating method to apply the release agent composition shown below at a coating amount (after drying) of 0.200 g / m 2 It was coated on the obtained polyester film in the same way as above, and a roll-shaped release film was obtained under the conditions of a dryer temperature of 150° C. and a line speed of 30 m / min. The evaluation results of the release film ar...

Embodiment 2A～4A

[0189] [Examples 2A to 4A], [Comparative Examples 1A to 6A]

[0190] Except having changed into the release agent composition shown in Table 1A about a silicone type release layer, it manufactured similarly to Example 1A, and obtained the release film. The evaluation results of the release film are shown in Table 2A.

[0191]

[0192] a1: Vinyl-modified silicone resin having at least 2 vinyl groups in the structure of polydimethylsiloxane (weight average molecular weight: 2000)

[0193] a2: Vinyl-modified silicone resin having at least 2 vinyl groups in the structure of polydimethylsiloxane (weight average molecular weight: 20000)

[0194]a3: Vinyl-modified silicone resin having at least 2 vinyl groups in the structure of polydimethylsiloxane (weight average molecular weight: 1000)

[0195] a4: Vinyl-modified silicone resin having at least 2 vinyl groups in the structure of polydimethylsiloxane (weight average molecular weight: 60000)

[0196] a5: Vinyl-modified silicone ...

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
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a release film that has good release properties from an adhesive, has little transferability, and is suitable for various adhesive layer protection applications. A release film having a silicone-based release layer formed of a release agent composition on at least one side of a polyester film, the release agent composition comprising: a weight average molecular weight of 500 to 30000, 1 molecule The first polydimethylsiloxane having at least one alkenyl group; the second polydimethylsiloxane having a weight average molecular weight of 150 to 10000 and at least one hydrosilyl group in one molecule; and platinum catalysts.

Description

technical field [0001] The present invention relates to release films. Background technique [0002] Conventionally, release films based on polyester films have been used in various applications (capacitive touch panels, polarizing plates for LCDs, retardation plates, PDP components, organic EL components, etc.) Components, various display components, various optical applications, etc.). [0003] The substrate-less double-sided adhesive sheet is formed by laminating a light release film with a relatively low release force and a heavy release film with a relatively high release force on both sides of the adhesive layer. After removing the release film on both sides, only the Double-sided adhesive sheet without an adhesive layer supporting a substrate. [0004] As a method of using a substrate-less double-sided adhesive sheet, the following processing steps can be exemplified: first, the light release film is peeled off, and one surface of the exposed adhesive layer is adher...

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): C08J7/04C09D183/07C09D183/05C09D5/20C08L67/02C08J7/043C08J7/044C08J7/046
CPCB32B27/00B32B27/36C08J7/043C08J7/046C08J7/044C09J7/401C08J5/18B32B27/283C08J7/04C09J7/29C08J2367/00C08J2483/04
Inventor 铃木太朗
Owner MITSUBISHI CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com