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Hot-melt OCA optical adhesive film and preparation method thereof

A hot-melt, optical adhesive technology, applied in the field of OCA optical adhesive, which can solve the problems of air bubbles and glue pulling, indentation, air bubbles, etc.

Inactive Publication Date: 2020-10-23
SUZHOU TONGLI PHOTOELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is no base material, it is a kind of soft glue in terms of performance. Only two processes of film change and die-cutting have brought many difficulties to OCA optical glue manufacturers: 1. It must be produced in a clean environment , to ensure that the replacement film and die-cutting knife are free from fluff, lint, dirt and foreign matter, etc.; 2. To ensure that the replacement film and die-cutting knife are flat and antistatic, any unevenness in the microscopic situation will affect the release type Stress stability, atmospheric exposure resistance and non-transferability have variable effects; 3. Air bubbles and glue pulling are easy to occur during film change and die-cutting. In addition to keeping the angle of lifting the discharged waste constant and reducing glue overflow, Also need high pressure defoaming, etc.
At the same time, during the bonding process of OCA optical film, due to uneven pressure, temperature and humidity environment, and material properties, defects such as white spots, indentations, bubbles, warping, and wrinkles often occur.

Method used

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  • Hot-melt OCA optical adhesive film and preparation method thereof
  • Hot-melt OCA optical adhesive film and preparation method thereof
  • Hot-melt OCA optical adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: A hot-melt OCA optical adhesive film and its preparation method

[0052] Hot-melt OCA optical adhesive film is an optical-grade material with hot-melt resin and silicone resin as the main body. The hot-melt resin includes thermoplastic resin, and the silicone resin includes: reactive methylphenylpolysiloxane, methyl phenyl T resin, methylphenyl silicone resin, phenyl crosslinking agent, phenyl chain extender and additives; among them, in thermoplastic resin and silicone resin:

[0053] The basic condition is 1 / 5≤M (hot-melt resin) / M (organic silicon resin)≤1 / 2, where M (hot-melt resin) is the total mass of hot-melt resin, M (silicone resin) is the total mass of the silicone resin. In this embodiment, M (hot-melt resin) / M (organic silicon resin)=0.3.

[0054] In terms of mass fraction, in silicone resin:

[0055] Reactive methyl phenyl polysiloxane 75%,

[0056] Methyl phenyl T resin 10%;

[0057] Methylphenyl silicone resin 10%;

[0058] Phenyl crosslin...

Embodiment 2

[0096] Example 2: A hot-melt OCA optical adhesive film and its preparation method

[0097] A hot-melt type OCA optical adhesive film, the raw material formula of the hot-melt type OCA optical adhesive film includes a hot-melt resin and a silicone resin, and the ratio of the total mass of the hot-melt resin to the total mass of the silicone resin is 0.35; The raw material formulation of the silicone resin includes the raw materials of the following mass fractions

[0098] Reactive methyl phenyl polysiloxane 50%;

[0099] Methyl phenyl T resin 37%;

[0100] Methylphenyl silicone resin 10%;

[0101] Phenyl crosslinking agent 1%;

[0102] Phenyl chain extender 1%;

[0103] Additive 1%.

[0104] A preferred embodiment is: the hot-melt resin includes a mixture of thermosetting resin and thermoplastic resin in a mass ratio of 1:1; the thermosetting resin is POSS resin; the general formula of POSS resin is as follows:

[0105]

[0106] The groups represented by R are differen...

Embodiment 3

[0135] Example 3: A hot-melt OCA optical adhesive film and its preparation method

[0136] A hot-melt type OCA optical adhesive film, the raw material formula of the hot-melt type OCA optical adhesive film includes a hot-melt resin and a silicone resin, and the ratio of the total mass of the hot-melt resin to the total mass of the silicone resin is equal to; The raw material formula of silicone resin includes the following mass fractions of raw materials

[0137] Reactive methyl phenyl polysiloxane 63%;

[0138] Methyl phenyl T resin 13.5%;

[0139] Methylphenyl silicone resin 15%;

[0140] Phenyl crosslinking agent 3%;

[0141] Phenyl chain extender 3%;

[0142] Additives 2.5%.

[0143] A preferred embodiment is: the hot-melt resin is a mixture of thermosetting resin and thermoplastic resin in a mass ratio of 1:3; the thermosetting resin is MQ resin;

[0144] The general formula of MQ resin is (Me 3 SiO 1 / 2 ) n (PhSiO 3 / 2 ) m , Me represents methyl, Ph represents p...

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Abstract

The invention discloses a hot-melt OCA optical adhesive film and a preparation method thereof. The hot-melt OCA optical adhesive film is a novel optical-grade material taking hot-melt resin and organic silicon resin as the main body, wherein the hot-melt resin comprises thermosetting resin and thermoplastic resin, and the organic silicon resin comprises: reactive methyl phenyl polysiloxane, methylphenyl T resin, methyl phenyl silicon resin, a phenyl cross-linking agent, a phenyl chain extender and an additive. Compared with the traditional OCA, the OCA provided by the invention has the advantages of excellent light transmission, bonding strength, cold and hot impact resistance and weather resistance.

Description

technical field [0001] The invention belongs to the technical field of OCA optical glue, and relates to a hot-melt type OCA optical glue film and a preparation method. Background technique [0002] The explosive growth of global smartphones, wearable smart products, and touch displays has brought sufficient orders and development space for OCA optical adhesive tape. Traditional OCA is to make optical acrylic without a substrate, and then attach the upper and lower layers. A layer of release film (generally also known as light release film and heavy release film), many high-end users also require another film change action during the production process to apply OCA optical adhesive to the original film. The heavy release film is replaced by a high-speed die-cutting ultra-release film. Because there is no base material, it is a kind of soft glue in terms of performance. Only two processes of film change and die-cutting have brought many difficulties to OCA optical glue manufa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/35C09J183/07C09J123/08C09J183/04C09J201/00C09J123/06C09J11/06C09J11/08
CPCC09J7/10C09J7/35C09J183/04C09J11/06C09J11/08C08L2205/025C08L2205/035C08L2207/062C08L83/04C08L23/0853C08K5/5425C08K5/5419C08L101/00C08L23/06
Inventor 蒋路谣华永军
Owner SUZHOU TONGLI PHOTOELECTRIC CO LTD
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