CN110576628A - Non-silicon matte double-sided release film and preparation process thereof - Google Patents
Non-silicon matte double-sided release film and preparation process thereof Download PDFInfo
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- CN110576628A CN110576628A CN201910926053.9A CN201910926053A CN110576628A CN 110576628 A CN110576628 A CN 110576628A CN 201910926053 A CN201910926053 A CN 201910926053A CN 110576628 A CN110576628 A CN 110576628A
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- silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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Abstract
The embodiment of the invention provides a non-silicon matte double-sided release film and a preparation process thereof, the release film comprises a non-silicon release agent layer, a base material layer and a matte non-silicon release agent layer which are sequentially connected, silicone oil or a silicon-containing release agent is not used, the production cost is reduced while the matte effect is achieved, meanwhile, the requirement of electronic material manufacturers on the performances of all sides of the release film can be met, and the problem that the adhesive performance or the surface character printing performance is influenced due to silicon transfer caused by the use of the silicone oil or the silicon-containing release agent in the existing matte release film is solved.
Description
Technical Field
The invention belongs to the technical field of release films, and particularly relates to a non-silicon matte double-sided release film and a preparation process thereof.
Background
The release film refers to a film having a low surface tension, and the release film has no stickiness or has slight stickiness when it is brought into contact with a surface of a specific material under a limited condition.
In recent years, with the development of electronic material industry, the rapid development of release film industry is driven. Among release agents required by the release film, compared with other release agents, the silicone oil and the silicon-containing release agent have many outstanding advantages, such as good transparency, good release effect, adjustable stripping force in a large range, high temperature resistance, solvent resistance, adjustable coating thickness and silicon content, good durability and reusability. Silicone oil and silicon-containing release agents have become the most interesting release agent materials, are widely applied in the industries of pressure sensitive adhesive tapes, waterproof materials, PCB manufacturing, automobile molding material manufacturing, electronic communication and the like, and permeate into more industries along with the development of technology.
Traditional matte release film is at the matte film material surface coating silicone oil or silicon-containing mold release agent, for example CN203833864U discloses a matte surface release film, including base film layer and the matte silicone oil coating that sets up at the profile of leaving of base film layer, should leave the type membrane through set up matte silicone oil coating on base film layer surface, can effectually guarantee that the glue that coats on it peels off the back glued membrane and becomes the matte. In addition, after the adhesive surface becomes matte, the adhesive is more firm when being coated on an attached object, and has a little exhaust effect, so that the adhesive is very suitable for preparing the self-adhesive with the heat conduction effect.
However, in the process of implementing the embodiments of the present application, the inventors of the present application found that the use of silicone oil or a silicon-containing release agent causes silicon transfer, which affects the adhesive performance or the surface printing performance, and causes problems of increased cost and lighter surface gloss.
Disclosure of Invention
In order to solve the problem that the prior matte release film has silicon transfer caused by using silicone oil or a silicon-containing release agent and affects the adhesive performance or the surface character printing performance, one of the purposes of the embodiment of the invention is to provide a non-silicon matte double-sided release film, which comprises a non-silicon release agent layer, a base material layer and a matte non-silicon release agent layer which are sequentially connected, wherein the silicone oil or the silicon-containing release agent is not used, so that the production cost is reduced while the matte effect is achieved, and meanwhile, the requirements of electronic material manufacturers on the performances of all sides of the release film can be met.
The utility model provides a two-sided release film of non-silicon matte, includes consecutive non-silicon release agent layer, substrate layer and the non-silicon release agent layer of matte, the corona value of substrate layer is greater than 38 dynes.
And carrying out corona treatment on the surface of the base material layer. Corona values of the base material layers of different materials after corona treatment are different, and if the base material layers are made of PET materials, the corona values of the base material layers after corona treatment are larger than 52 dynes; if the PP or PE material is adopted, the corona value of the base material layer after treatment is more than 38 dynes.
The reason why the corona value of the non-silicon release agent layer and the matte non-silicon release agent layer are both larger than 52 is that the surface of the substrate layer needs to be subjected to corona treatment.
Preferably, the thickness of the base material layer is 38-75 μm.
Preferably, the thickness of the non-silicon release agent layer is 0.1-3.0 μm.
Preferably, the thickness of the matte non-silicon release agent layer is 0.1-3.0 μm.
Preferably, the substrate layer includes at least one of a PET layer, a PE layer, a PP layer, and a PC film.
The preparation process of the non-silicon matte double-sided release film comprises the following steps:
S1: coating the uniformly mixed matte powder and the non-silicon release agent on the surface of the base material layer, and forming a matte non-silicon release agent layer after primary baking and curing;
S2: and coating the non-silicon release agent on the other surface of the substrate layer, and forming a non-silicon release agent layer after secondary baking and curing.
Preferably, the non-silicon release agent comprises a fluorocarbon resin release agent.
Preferably, the addition amount of the matte powder is 0.1-10.0% of the mass of the non-silicon release agent.
Preferably, the temperature of the first baking is 70-180 ℃.
Preferably, the time for the first baking is 15-25 s.
Preferably, the temperature of the second baking is 70-180 ℃.
Preferably, the time of the second baking is 15-25 s.
In step S2, the uniformly mixed matte powder and non-silicon release agent may be coated on the other surface of the substrate layer as in step S1.
The preparation process of the non-silicon matte double-sided release film further comprises the step of carrying out corona treatment on the surface of the base material layer before the step S1.
Preferably, the corona treatment method comprises the following steps: high-frequency and high-voltage electricity is applied to processing equipment to generate high-frequency and high-voltage discharge, fine and dense violet-blue sparks are generated, and under the action of a strong electric field, the plastic film in the processing device is accelerated and impacted, so that chemical bonds of plastic molecules are broken and degraded, and the surface roughness and the surface area are increased.
The purpose of corona treatment is to improve the adhesive force of the release agent layer, and meanwhile, the matte effect of the release film is not affected.
The embodiment of the invention has the beneficial effects
1. According to the non-silicon matte double-sided release film provided by the embodiment of the invention, the release film comprises a non-silicon release agent layer, a base material layer and a matte non-silicon release agent layer which are sequentially connected, and silicone oil or a silicon-containing release agent is not used, so that the production cost is reduced while the matte effect is achieved, and meanwhile, the requirements of electronic material manufacturers on the performances of all sides of the release film can be met;
2. The preparation process of the non-silicon matte double-sided release film provided by the embodiment of the invention has simple steps, one surface of the non-silicon matte double-sided release film is a matte non-silicon release agent layer, and the other surface of the non-silicon matte double-sided release film can be selected as required, so that the structure is flexible, and the application range is wide.
Drawings
Fig. 1 is a schematic structural view of a non-silicon matte double-sided release film of embodiment 1.
Fig. 2 is a schematic structural view of the non-silicon matte double-sided release film of embodiment 2.
Detailed Description
The embodiment of the invention provides a non-silicon matte double-sided release film and a preparation process thereof, the release film comprises a non-silicon release agent layer, a base material layer and a matte non-silicon release agent layer which are sequentially connected, silicone oil or a silicon-containing release agent is not used, the production cost is reduced while the matte effect is achieved, meanwhile, the requirement of electronic material manufacturers on the performances of all sides of the release film can be met, and the problem that the adhesive performance or the surface character printing performance is influenced due to silicon transfer caused by the use of the silicone oil or the silicon-containing release agent in the existing matte release film is solved.
In order to better understand the above technical solutions, the above technical solutions will be described in detail with reference to specific embodiments.
Example 1
The example provides a non-silicon matte double-sided release film, as shown in fig. 1, which comprises a non-silicon release agent layer 1, a substrate layer 2 and a matte non-silicon release agent layer 3 which are connected in sequence, wherein the surface of the substrate layer needs to be subjected to corona treatment. The corona value of the substrate layer is greater than 38 dynes.
Corona values of the base material layers of different materials after corona treatment are different, and if the base material layers are made of PET materials, the corona values of the base material layers after corona treatment are larger than 52 dynes; if the PP or PE material is adopted, the corona value of the base material layer after treatment is more than 38 dynes.
The thickness of the base material layer 2 was 38 μm. The thickness of the non-silicon release agent layer was 0.1 μm. The thickness of the matte non-silicon release agent layer is 0.1 mu m. The base material layer 2 includes at least one of a PET layer, a PE layer, and a PP layer.
Example 2
The embodiment provides a non-silicon matte double-sided release film, as shown in fig. 2, which comprises a matte non-silicon release agent layer 3, a substrate layer 2 and a matte non-silicon release agent layer 3 which are sequentially connected, wherein the surface of the substrate layer needs to be subjected to corona treatment.
the thickness of the base material layer 2 was 75 μm. The thickness of the non-silicon release agent layer was 3.0 μm. The thickness of the matte non-silicon release agent layer is 3.0 mu m. The base material layer 2 includes at least one of a PET layer, a PE layer, and a PP layer.
Example 3
The embodiment provides a preparation process of a non-silicon matte double-sided release film, which comprises the following steps:
S1: coating the uniformly mixed matte powder and the non-silicon release agent on the surface of the base material layer, and forming a matte non-silicon release agent layer after primary baking and curing;
S2: and coating the non-silicon release agent on the other surface of the substrate layer, and forming a non-silicon release agent layer after secondary baking and curing.
Wherein the non-silicon release agent comprises fluorocarbon resin release agent. The addition amount of the matte powder is 3-5% of the mass of the non-silicon release agent.
The temperature of the first baking is 70-180 ℃.
The first baking time is 15-25 s.
The temperature of the second baking is 70-180 ℃.
the time for the second baking is 15-25 s.
In step S2, the uniformly mixed matte powder and non-silicon release agent may be coated on the other surface of the substrate layer as in step S1.
The preparation process of the non-silicon matte double-sided release film further comprises the step of carrying out corona treatment on the surface of the base material layer before the step S1.
The method of corona treatment comprises the following steps: high-frequency and high-voltage electricity is applied to processing equipment to generate high-frequency and high-voltage discharge, fine and dense violet-blue sparks are generated, and under the action of a strong electric field, the plastic film in the processing device is accelerated and impacted, so that chemical bonds of plastic molecules are broken and degraded, and the surface roughness and the surface area are increased. .
Example of detection
Using the preparation process of example 3, a non-silicon matte double-sided release film was prepared according to the mold structure of example 1, and the film was tested for peel force and residual adhesion while using a commercially available silicon-coated release film as a comparison. The results are shown in Table 1.
The peel force test method comprises the following steps: adhering TESA7454 adhesive tape to the silicon coating film according to standard method, cutting into strips according to shape of the adhesive tape, pressing standard stainless steel strip at room temperature for 20h (20 g/cm)2) A release force tester (AR-1500) was used to test the release force, which is the tensile force at a tensile speed of 30cm/min and a tensile angle of 180 degrees.
the method for testing the residual adhesion rate comprises the following steps: the method comprises the following steps of attaching a Nitto31B adhesive tape to a silicon-coated release film to be tested according to a standard method, cutting the silicon-coated release film into strips according to the shape of the adhesive tape, pressing a standard stainless steel strip in an oven at 70 ℃ for 20 hours, taking out the stainless steel strip, standing the stainless steel strip at room temperature for 1 hour, tearing the adhesive tape, attaching the adhesive tape to a blank BOPET film, testing the tensile speed to be 30cm/min by using a release force tester (AR-1500), and testing the tensile force to be the release force when the tensile angle is 180 degrees. The adhesion participation rate is obtained by dividing the peeling force between the adhesive tape adhered to the release film and the BOPET by the peeling force between the control adhesive tape and the blank PET, and the calculation equation is as follows:
x is f1/f2 x 100%, where x is the residual adhesion and f1 is the peel force of the tape removed from the release film from the blank BOPET, g/cm.
Table 1 peel force and residual adhesion test results
| serial number | Peel force, g/cm | Residual adhesive force% |
| Example 1 sample | 128 | 96 |
| Commercially available silicon-coated release film | 20 | 92 |
In the prior art, some processes adopt a method of firstly coating a matte coating, then coating an antistatic layer and finally coating a release layer, and the method has various working procedures and poor adhesion fastness among coatings. The matte release film provided by the embodiment of the invention is prepared by directly adding the matte powder into the release agent, fully grinding and uniformly dispersing the mixture, and directly coating the mixture on the substrate film, so that the process is less, and the coating has good adhesion fastness.
The following is the adhesion test condition after coating the matte release film:
Method for testing adhesion fastness: according to GB/T9286-1998, a hundred-grid knife is used for uniformly applying force perpendicular to the surface of a release film, at least 6 parallel cutting lines are stably scribed, then the parallel cutting lines are perpendicularly crossed at 90 degrees with the first cutting lines to scribe 6 parallel lines to form a grid pattern, and then an adhesive tape is applied to the center of the grid to ensure that the adhesive tape is completely contacted with a release agent. And lifting the adhesive tape to form an angle of about 60 degrees with the sample plate, continuously and stably withdrawing the adhesive tape, and then observing the falling condition of the release agent in the grid.
And (3) testing results: the cutting edge is complete and smooth, no one piece falls off, and the adhesion fastness reaches 0 grade (the highest grade).
The matte release film provided by the embodiment of the invention is applied to the production of an electromagnetic shielding film, and can be easily uncovered and transferred after being pressed and transferred at high temperature in the using process as a carrier film of the electromagnetic shielding film, and the transferred release agent can not be transferred.
the following provides the experimental conditions of the electromagnetic shielding film manufactured by using the matte release film as a carrier:
the electromagnetic shielding film test method comprises the following steps: laminating the electromagnetic shielding film on the FPC substrate by using a quick press, wherein the lamination parameters are as follows: the pressure is 100KG, the pressing temperature is 180 ℃, and the pressing time is 120 s; after pressing, the sample is cut into strips (200mm long and 25mm wide), an XLW (PC) intelligent electronic tensile tester is used for testing the tensile force, namely the release force, when the tensile speed is 30cm/min and the tensile angle is 180 degrees, the smaller the release force of the release film is, the easier the release film is to be uncovered, and whether the release agent is transferred or not can be directly observed by naked eyes after the release film is uncovered.
The test results are shown in table 2.
Table 2 test chart for release force and release agent transfer after pressing electromagnetic shielding film
Claims (10)
1. the utility model provides a two-sided release film of non-silicon matte which characterized in that, including consecutive non-silicon mold release layer (1), substrate layer (2) (2) and matte non-silicon mold release layer (3), the corona value of substrate layer (2) is greater than 38 dynes.
2. the non-silicon matte double-sided release film according to claim 1, wherein the thickness of the substrate layer (2) is 38-75 μm.
3. The non-silicon matte double-sided release film according to claim 1, wherein the substrate layer (2) comprises at least one of a PET layer, a PE layer, a PP layer and a PC film.
4. The preparation process of the non-silicon matte double-sided release film according to any one of claims 1 to3, which is characterized by comprising the following steps:
s1: coating the uniformly mixed matte powder and the non-silicon release agent on the surface of the substrate layer (2), and forming a matte non-silicon release agent layer (3) after primary baking and curing;
S2: and coating the non-silicon release agent on the other surface of the substrate layer (2), and forming a non-silicon release agent layer (1) after secondary baking and curing.
5. the preparation process of the non-silicon matte double-sided release film according to claim 4, wherein the non-silicon release agent comprises fluorocarbon resin release agent.
6. The preparation process of the non-silicon matte double-sided release film according to claim 4, wherein the addition amount of the matte powder is 0.1-10.0% of the mass of the non-silicon release agent.
7. The preparation process of the non-silicon matte double-sided release film according to claim 4, wherein the temperature of the first baking is 70-180 ℃.
8. The preparation process of the non-silicon matte double-sided release film according to claim 4, wherein the first baking time is 15-25 s.
9. The preparation process of the non-silicon matte double-sided release film according to claim 4, wherein the temperature of the second baking is 70-180 ℃.
10. The preparation process of the non-silicon matte double-sided release film according to claim 4, wherein the time for the second baking is 15-25 s.
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Cited By (1)
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| CN112760058A (en) * | 2020-12-31 | 2021-05-07 | 东莞市金恒晟新材料科技有限公司 | Release film for protecting label |
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