CN113607892A - Method for detecting whether silicone oil of PET (polyethylene terephthalate) protective film can transfer or not - Google Patents
Method for detecting whether silicone oil of PET (polyethylene terephthalate) protective film can transfer or not Download PDFInfo
- Publication number
- CN113607892A CN113607892A CN202110947719.6A CN202110947719A CN113607892A CN 113607892 A CN113607892 A CN 113607892A CN 202110947719 A CN202110947719 A CN 202110947719A CN 113607892 A CN113607892 A CN 113607892A
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- Prior art keywords
- protective film
- pet protective
- silicone oil
- glue layer
- baking
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- 230000001681 protective effect Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229920002545 silicone oil Polymers 0.000 title claims abstract description 27
- 229920000139 polyethylene terephthalate Polymers 0.000 title description 23
- 239000005020 polyethylene terephthalate Substances 0.000 title description 23
- -1 polyethylene terephthalate Polymers 0.000 title description 3
- 239000003292 glue Substances 0.000 claims abstract description 23
- 239000011521 glass Substances 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 18
- 238000007689 inspection Methods 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 41
- 239000005341 toughened glass Substances 0.000 description 9
- 239000012528 membrane Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 230000003749 cleanliness Effects 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0096—Testing material properties on thin layers or coatings
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a method for detecting whether silicone oil of a PET protective film can transfer or not. The method comprises the following steps: s1, rolling the release surfaces of the two PET protective films to be tested on the two surfaces of the SCA glue layer respectively; then sequentially carrying out pressing and pressure defoaming; s2, clamping the SCA glue layer processed in the step S1 between two pieces of glass, and then placing the glass in an oven for baking; s3, inspecting in the baking process and after the baking is finished, wherein if the release surface of the PET protective film and the surface of the SCA glue layer are clean, the risk of falling and transferring of the PET protective film silicone oil is low, and if the release surface of the PET protective film and the surface of the SCA glue layer are oil stains or dirt, the risk of falling and transferring of the PET protective film silicone oil is high; the PET protective film is a protective film with release force and hardness, the surface of which is coated with silicone oil. The method for testing whether the silicone oil of the PET protective film can be transferred is simple and easy to operate, adopts an intuitive mode for observation, does not need complex calculation and complex operation steps, and is easier to judge.
Description
Technical Field
The invention relates to a method for detecting whether silicone oil of a PET (polyethylene terephthalate) protective film can transfer, and belongs to the technical field of optical cement.
Background
In the process of manufacturing the optical cement, a protective film is usually used for being bonded on the surface of the optical cement, so that the cleanliness of the optical cement is ensured, and the surface of the optical cement is protected from being damaged. Generally, a PET protective film coated with silicone oil on the surface is selected, and the protective film has the advantages of good release property, strong hardness and the like. However, in the actual use process, the silicone oil on the surface of the protective film can be transferred to the surface of the film, thereby affecting the cleanliness of the optical film and seriously affecting the performance of the film. It is therefore necessary to detect whether the silicone oil of the PET protective film has transferred. The existing method for detecting whether the silicone oil is transferred is a residual adhesion rate calculation method, which has large error, difficult operation and more uncontrollable factors.
Disclosure of Invention
The invention aims to provide a method for accurately detecting whether silicone oil on the surface of a PET protective film transfers or not, which is simple and easy to operate, can easily judge whether silicone oil transfers or not, and does not need complicated calculation.
The method for detecting whether the silicone oil of the PET protective film can transfer or not comprises the following steps:
s1, rolling the release surfaces of the two PET protective films to be tested on the two surfaces of the SCA glue layer respectively; then sequentially carrying out pressing and pressure defoaming;
s2, clamping the SCA glue layer processed in the step S1 between two pieces of glass (tempered glass or common glass to ensure that the release film cannot be warped, deformed and released in the pressing and defoaming processes), and then placing the SCA glue layer in an oven for baking;
s3, inspecting in the baking process and after the baking is finished, wherein if the surfaces of the release surface of the PET protective film and the surface of the SCA glue layer are clean, the risk of falling and transferring of the PET protective film silicone oil is low, and if the surfaces of the release surface of the PET protective film and the surface of the SCA glue layer are oil stains or dirt, the risk of falling and transferring of the PET protective film silicone oil is high;
the PET protective film is a protective film with release force and hardness, the surface of which is coated with silicone oil;
the SCA adhesive layer is an ultraviolet curing adhesive layer, is a white opaque low-viscosity adhesive sheet before being heated and pressurized, and becomes a white transparent colloid after being pressurized at a high temperature in vacuum, and the surface of the colloid has good cleanliness and no defects.
In the above method, in step S1, the PET protective film is rolled on the surface of the SCA tape layer by using a non-adhesive bonding roller.
In the above method, in step S1, the stitching step includes:
and clamping the SCA glue layer between the two pieces of glass, and then placing the glass in laminating equipment, wherein the laminating conditions are as follows:
the vacuum degree is below-96 kpa, the pressure is 1-5 kg, the temperature is 75-80 ℃, and the time is 60-80 s.
In the above method, in step S1, the pressure defoaming step includes:
placing the laminated SCA adhesive layer in a defoaming machine for defoaming under the following conditions:
the temperature is 70-75 ℃, the pressure is 1-5 kg, and the time is 20-30 minutes.
In the method, in the step S2, the baking temperature is 65-70 ℃ and the baking time is 72-168 hours.
In the above method, in step S3, after baking for 72-168 hours (preferably, after baking for 72 hours and 168 hours, a certain number of products are respectively taken out for inspection), a part of the products are taken out for inspection.
In the above method, in step S3, the inspection is performed according to the following steps:
tearing off the separate surface to check whether the surface of the separate surface is oil stain or dirty, and then checking whether the surface of the SCA glue layer is oil stain or dirty;
the inspection is preferably performed in a low light environment.
The method for testing whether the silicone oil of the PET protective film can be transferred is simple and easy to operate, adopts an intuitive mode for observation, does not need complex calculation and complex operation steps, and is easier to judge.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The invention provides a method for detecting whether silicone oil of a PET protective film can transfer, which comprises the following steps:
1. rolling and sticking the release surface of the PET protective film to be tested on the SCA glue layer with higher cleanliness by using a non-viscous sticking roller respectively;
2. clamping the SCA adhesive pasted with the release film in the step 1 between two pieces of toughened glass, putting the two pieces of toughened glass into a pasting device, and laminating the two pieces of toughened glass in a mode of vacuumizing to below-96 kpa, wherein the pressure is 1-5 kilograms, the temperature is 75-80 ℃, and the laminating time is 60-80 seconds;
3. placing the SCA adhesive layer pressed in the step 2 into a defoaming machine, wherein the setting parameters are 70-75 ℃, the pressure is 1-5 kg, and the time is 20-30 minutes, and carrying out pressure defoaming;
4. and (4) clamping the defoamed product in the step (3) between two pieces of toughened glass, and then putting the product into an oven, wherein the temperature of the oven is 65-70 ℃, and the time is 72-168 hours.
5. Baking the product in an oven for 72 hours and 168 hours, then respectively taking out partial products, placing the products in front of an inspection table with dark light, slightly tearing off one release film, checking whether the surface of the release film has oil stains and other defects, then tearing off the SCA glue layer to check whether the surface of the film is clean and whether oil stains and other residues exist, and finally checking whether the other release film is clean;
6. and (5) repeating the action of the step 5 after the baking in the oven is finished to check:
if the surfaces of the release film and the film are clean in the tests in the steps 5 and 6, the release film is qualified, and the risk of silicone oil falling and transferring is low; if the surfaces of the release film and the SCA film have oil stains or dirt in the steps 5 and 6, the risk of silicone oil falling and transferring is higher.
The following tests were performed on a certain PET protective film:
1. respectively rolling and sticking the release surface of the PET protective film on the SCA glue layer with higher cleanliness by using a non-viscous sticking roller;
2. clamping the SCA adhesive pasted with the release film in the step 1 between two pieces of toughened glass, putting the two pieces of toughened glass into a pasting device, and laminating the two pieces of toughened glass in a mode of vacuumizing to below-96 kpa, wherein the pressure is 3 kilograms, the temperature is 78 ℃, and the laminating time is 70 seconds;
3. placing the pressed SCA adhesive layer in the step 2 into a defoaming machine, setting the parameters at 72 ℃, the pressure at 2 kilograms and the time at 20 minutes, and carrying out pressure defoaming;
4. and (4) clamping the defoamed product in the step (3) between two pieces of toughened glass, and then putting the product into an oven, wherein the temperature of the oven is 65 ℃, and the time is 168 hours.
5. Baking 72 in the oven takes out partial product for a short time and put before the darker inspection table of light, tearing the one side gently and leaving the type membrane, looking over from the type membrane surface, it is unclean or have the oil stain to remain as a result, then tear the SCA glue film again and look over the film surface, it is unclean or have the oil stain to remain as a result, look over another piece again at last and leave the type membrane, it is unclean or have the oil stain to remain as a result.
6. The action of step 5 is repeated after baking 168 hours in the oven and is examined, tears the one side gently and leaves the type membrane, looks over from the type membrane surface, and the result has unclean or has the oil stain to remain, then tears the SCA glue film again and looks over the film surface, and the result has unclean or has the oil stain to remain, looks over another piece at last again and leaves the type membrane, and the result has unclean or has the oil stain to remain.
From the above analysis results, it can be seen that the risk of silicone oil shedding and transfer of the PET protective film is high.
Claims (8)
1. A method for detecting whether silicone oil of a PET protective film can transfer or not comprises the following steps:
s1, rolling the release surfaces of the two PET protective films to be tested on the two surfaces of the SCA glue layer respectively; then sequentially carrying out pressing and pressure defoaming;
s2, clamping the SCA glue layer processed in the step S1 between two pieces of glass, and then placing the SCA glue layer in an oven for baking;
s3, inspecting in the baking process and after the baking is finished, wherein if the surfaces of the release surface of the PET protective film and the surface of the SCA glue layer are clean, the risk of falling and transferring of the PET protective film silicone oil is low, and if the surfaces of the release surface of the PET protective film and the surface of the SCA glue layer are oil stains or dirt, the risk of falling and transferring of the PET protective film silicone oil is high;
the PET protective film is a protective film with release force and hardness, and the surface of the protective film is coated with silicone oil.
2. The method of claim 1, wherein: in step S1, the PET protective film is rolled and bonded to the surface of the SCA adhesive layer by using a non-adhesive bonding roller.
3. The method according to claim 1 or 2, characterized in that: in step S1, the pressing step is as follows:
and clamping the SCA glue layer between the two pieces of glass, and then placing the glass in laminating equipment, wherein the laminating conditions are as follows:
the vacuum degree is-96 kpa, the pressure is 1-5 kg, the temperature is 75-80 ℃, and the time is 60-80 s.
4. The method according to any one of claims 1-3, wherein: in step S1, the pressure defoaming step includes:
placing the laminated SCA adhesive layer in a defoaming machine for defoaming under the following conditions:
the temperature is 70-75 ℃, the pressure is 1-5 kg, and the time is 20-30 minutes.
5. The method according to any one of claims 1-4, wherein: in the step S2, the baking temperature is 65-70 ℃, and the baking time is 72-168 hours.
6. The method according to any one of claims 1-5, wherein: in step S3, after baking for 72-168 h, a part of the product is taken out for inspection.
7. The method of claim 6, wherein: the inspection was performed after 72h and 168h of baking, respectively.
8. The method according to any one of claims 1-7, wherein: in step S3, the following steps are performed:
tearing off the separation surface to check whether the surface of the separation surface is oil stain or dirty, and then checking whether the surface of the SCA glue layer is oil stain or dirty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110947719.6A CN113607892A (en) | 2021-08-18 | 2021-08-18 | Method for detecting whether silicone oil of PET (polyethylene terephthalate) protective film can transfer or not |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110947719.6A CN113607892A (en) | 2021-08-18 | 2021-08-18 | Method for detecting whether silicone oil of PET (polyethylene terephthalate) protective film can transfer or not |
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| Publication Number | Publication Date |
|---|---|
| CN113607892A true CN113607892A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110947719.6A Pending CN113607892A (en) | 2021-08-18 | 2021-08-18 | Method for detecting whether silicone oil of PET (polyethylene terephthalate) protective film can transfer or not |
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| Country | Link |
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| CN (1) | CN113607892A (en) |
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