CN104324922A

CN104324922A - Method for removing adhesive residue of touch screen

Info

Publication number: CN104324922A
Application number: CN201410475508.7A
Authority: CN
Inventors: 周群飞; 饶桥兵; 邓小燕
Original assignee: Lens Technology Changsha Co Ltd
Current assignee: Lens Technology Changsha Co Ltd
Priority date: 2014-09-17
Filing date: 2014-09-17
Publication date: 2015-02-04

Abstract

The invention discloses a method for removing adhesive residue of a touch screen. The method comprises the following steps: a, preparing saline water, namely preparing sodium chloride and de-ionized water into the saline water with concentration of 0.5-5 percent; b, heating, namely heating the saline water to 80-100 DEG C; c, soaking, namely completely soaking CG or SG (Cover Glass or Sensor Glass) with OCA (Optically Clear Adhesive) residue in the saline water to cook for 5-30 minutes; d, stripping the adhesive residue, namely taking the CG or SG out, cooling until to room temperature and wiping off the adhesive residue, and then wiping blots with a nonwoven fabric stained with alcohol having the concentration of being more than 99 percent; e, cleaning, namely placing the CG or SG after adhesive residue removal in pure water of 40-60 DEG C to clean for 3-10 minutes to remove the surface alcohol blots. According to the method, the OCA/LOCA (Liquid Optical Clear Adhesive) residue on the SG and CG can be completely removed, the time can be saved, no toxicity or irritation is produced, and the reuse of the SG is not affected.

Description

A kind of method removing touch-screen cull

Technical field

The present invention relates to a kind of method removing touch-screen cull.

Background technology

GG structure (Cover Glass+Sensor Glass) touch-screen component part is divided into induction glass (to be called for short SG, lower same) and cover-plate glass (being called for short CG), generally use liquid optical cement (LOCA) or solid state optics glue (OCA) both to be fitted.In laminating processing procedure, have the defective products such as bubble, foreign matter, skew to produce, the disassembled recycling of doing over again of this outward appearance defective products, but SG and CG after disassembling has OCA or LOCA colloid and remain, palpus cleans.Because OCA glue is organic mixture, main component is polyacrylacid ester compounds, with glass gluing, particularly after high pressure deaeration, suction-operated is very strong, cause doing over again except glue difficulty, traditional handicraft uses the chemical reagent such as alcohol, acetone, ethyl acetate, and utilize the similar principle that mixes to soak colloidal sol, this method cleaning speed is slow, and often have the darker colloid of state of cure to dissolve completely, except glue is not thorough; Or with strong acid carbonization organic principle except glue, it is improper that strong acid controls, and can destroy SG top layer circuit and cause disabler.

Summary of the invention

The object of the invention is to provide one thoroughly can remove the upper OCA/LOCA cull of SG, CG for the deficiencies in the prior art, can save time again, nontoxic non-stimulated, the method that do not affect the removing touch-screen cull that CG or SG utilizes again.

The present invention is achieved through the following technical solutions above-mentioned purpose:

Remove a method for touch-screen cull, CG or SG of OCA cull is soaked in completely pure water or not higher than boiling in the salt solution of 5% after 5 ~ 30 minutes, then the OCA cull on CG or SG is peeled off.

Specifically comprise the steps:

A, configuration salt solution: use sodium chloride or potassium chloride and deionized water, be configured to the salt solution that concentration is 0.5% ~ 5%;

B, heating: salt solution is heated to 80 ~ 100 DEG C;

C, immersion: to be soaked in salt solution boiling completely 5 ~ 30 minutes by there being CG or SG of OCA cull;

D, stripping cull: CG or SG is taken out after being cooled to room temperature and wipe cull, be then stained with more than 99% concentration wipes of alcohol except trace with non-dust cloth;

E, cleaning: CG or SG after erasing cull is put into 40 ~ 60 DEG C of pure water cleanings 3 ~ 10 minutes, remove surperficial alcohol print.

In step c, CG or SG of OCA cull, when boiling, when the salt content of salt solution is 0.5%, needs 15 ~ 30 minutes used times; When the salt content of water is 5%, need 5 ~ 15 minutes used times.

In steps d, during erasing cull, keep CG or SG moistening simultaneously.

In step b, salt solution is heated to 80 ~ 100 DEG C.

In step c, ultrasonic wave can be adopted to remove cull simultaneously.

Owing to adopting such scheme, after utilizing hydrone and the less chloride permeability OCA of particle diameter, with glass substrate effect, form the groups such as silicon alcohol radical, destroy the active force such as Van der Waals force, hydrogen bond between glass and OCA, reduce the interface bonding energy between glass and OCA, thus reach the object being easy to peel off.Here brine strength is not higher than 5%, prevents salt solution from impacting the circuit on CG or SG, and the time of boiling is determined according to the concentration of the thickness of cull and salt solution, and the time is no more than 30 minutes, prevents from causing damage to CG or SG.

OCA cull can be made to peel off easily, CG or SG can utilize again, and overall yield improves 5% ~ 15%, and manpower/Material Cost declines 5% ~ 10%, and unit interval production capacity rises 5% ~ 10%; And adopt this method workable, be easy to operation, and nontoxic non-stimulated, conform to the requirement of career safety & health with Environmental security.

Detailed description of the invention

Below by example, further describe the detailed description of the invention of this patent.

Embodiment: test for upper whole the OCA cull of CG, CG below

Adopt alcohol, ethyl acetate, benzinum, acetone, stripper solution in an embodiment, ethyl acetate and benzinum 1:1 proportioning solution, pure water, the salt solution of 0.5% and the salt solution of 5% process according to this method,

Substantially the principle followed of process cull cleaning is as follows:

1, do not damage glass, such as highly basic has corrosion to glass;

2, do not damage ink, general ink can do poach test, be generally after half an hour, ink nondiscolouring, hundred lattice test do not come off, so this test with boiling 30min for the upper limit;

3, SG has circuit, although there is TOP OC to protect, general finished product test requires to cross environmental testing; wherein one is salt spray test: the NaCl aqueous solution spraying of 5%; require not etching lines, and TOP OC hundred lattice test more than 4B, therefore this test with salinity 5% for the upper limit.

Result as following table,

Wherein alcohol, acetone normal temperature (about 25 DEG C) soak more than 30 minutes as can be seen from the table, can partly wipe, but acetone have damage to ink; Soak more than 30 minutes under ethyl acetate, ethyl acetate and benzinum 1:1 proportioning solution room temperature, partly can wipe, and have damage to ink, pure ethyl acetate effect slightly well; Stripper solution 60 DEG C soaks more than 30 minutes, partly can wipe, but have damage to glass.

Boiling water cooking process: cleaning is very fast, more thoroughly.1), pure water boiling 10 ^~20 minutes, cull deliquescing, comparatively easy to clean, do not hinder glass and ink, glass can be waited to be chilled to room temperature cleaning, but will ensure that glass is moistening.Salt solution boiling more than 5 minutes, cull deliquescing, comparatively easy to clean, do not hinder glass and ink, glass can be waited to be chilled to room temperature cleaning, but will ensure that glass is moistening; Consider that ultrasonic wave has certain cleaning capacity to dirty, if use salt solution ultrasonic wave, temperature can reduce, and effect may be better.

Claims

1. remove a method for touch-screen cull, it is characterized in that: CG or SG of OCA cull is soaked in completely pure water or not higher than boiling in the salt solution of 5% after 5 ~ 30 minutes, then the OCA cull on CG or SG is peeled off.

2. the method for removing touch-screen cull according to claim 1, is characterized in that: specifically comprise the steps:

B, heating: salt solution is heated to 80 ~ 100 DEG C;

3. the method for removing touch-screen cull according to claim 2, is characterized in that: in step c, CG or SG of OCA cull, when boiling, when the salt content of salt solution is 0.5%, needs 15 ~ 30 minutes used times; When the salt content of water is 5%, need 5 ~ 15 minutes used times.

4. according to the method for the removing touch-screen cull one of claims 1 to 3 Suo Shu, it is characterized in that: in steps d, during erasing cull, keep CG or SG moistening simultaneously.

5. the method for removing touch-screen cull according to claim 4, is characterized in that: in step b, salt solution is heated to 80 ~ 100 DEG C.

6. the method for removing touch-screen cull according to claim 2, is characterized in that: in step c, and ultrasonic wave can be adopted to remove cull simultaneously.