Residue-resistant PE (polyethylene) protective film as well as preparation method and application thereof

Abstract

The invention discloses an anti-residue PE protective film and a preparation method and application thereof. The anti-residue PE protective film comprises a PE original film; an adhesive layer is arranged on the upper surface of the PE original film; wherein the adhesive layer is prepared by coating a PE original film subjected to surface treatment with an adhesive, and the adhesive comprises the following raw materials in parts by weight: 60-100 parts of high molecular weight polyisobutene, 10-50 parts of methyl vinyl silicone rubber, 10-50 parts of low molecular weight polyisobutene, 30-70 parts of a plasticizer and 1-5 parts of an antioxidant; wherein the plasticizer is a compound of naphthenic base oil and chain alkyl base oil. According to the anti-residue PE protective film as well as the preparation method and the application thereof, the surface roughness of the PE original film is increased by performing surface treatment on the PE original film, the adsorption capacity of the PE original film and an adhesive is further improved, and the formula of the adhesive is optimally designed, so that the adhesive layer and the PE original film have better adaptability and proper peel strength; the residue resistance of the PE protective film is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of PE protective films, and in particular relates to an anti-residue PE protective film and a preparation method and application thereof. Background Art

[0002] Polymer materials have excellent performance and a wide range of uses. Polyethylene, as a representative of organic film materials, is widely used for its advantages of low cost, good thermal stability, stable chemical properties, and extremely low friction coefficient. Among them, large and valuable items such as high-end cars, airplanes, and yachts need additional protection measures to extend their service life because the decorative panels of these items are very expensive and easily damaged. Covering the decorative panels of the above items with PE protective film is a common protection measure.

[0003] The anti-residue performance of PE protective film refers to the ability to not leave glue or residue on the surface when it is torn off after being pasted. PE protective film used in high-end cars, aircraft and yachts have high requirements for anti-residue performance. It is usually required that after the PE protective film is removed, there should be no residue or traces on the surface of the object.

[0004] Therefore, it is necessary to develop an anti-residue PE protective film and its preparation method, which can be used to protect the decorative panels of large and valuable items such as high-end cars, airplanes and yachts. It has high anti-residue performance. After the PE protective film is removed, there will be no residue or traces on the surface of the object. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide an anti-residue PE protective film and its preparation method and application, which are reasonably designed, and the surface roughness of the PE original film is increased by surface treatment, and the adsorption capacity of the PE original film and the adhesive is further improved. The formula of the adhesive is optimized to make the adhesive layer and the PE original film have better adaptability, have appropriate peel strength, improve the anti-residue performance of the PE protective film, and have broad application prospects.

[0006] The objective of the present invention is achieved through the following technical solutions: An anti-residue PE protective film comprises an original PE film; an adhesive layer is arranged on the upper surface of the original PE film; wherein the adhesive layer is prepared by coating an adhesive on the surface-treated original PE film, and the adhesive comprises the following raw materials in parts by weight: 60-100 parts of high molecular weight polyisobutylene, 10-50 parts of methyl vinyl silicone rubber, 10-50 parts of low molecular weight polyisobutylene, 30-70 parts of plasticizer, and 1-5 parts of antioxidant; wherein the plasticizer is a compound of cycloalkyl base oil and chain alkyl base oil.

[0007] In order to improve the anti-residue performance of the PE protective film, the first embodiment of the present invention performs surface treatment on the PE original film to increase its surface roughness, further improve the adsorption capacity of the PE original film and the adhesive, thereby reducing the situation where the adhesive layer is left when the PE protective film is withdrawn; the second embodiment of the present invention optimizes the formula of the adhesive so that the adhesive layer and the PE original film have better adaptability and appropriate peeling strength. After the PE protective film is pasted, it is not easy to fall off and can play a protective role for a long time. At the same time, the appropriate peeling strength will not leave adhesive on the surface when it is torn and pasted.

[0008] The adhesive has both hot-melt and pressure-sensitive properties. It is coated on the surface-treated PE original film in a molten state. After hardening and crystallization, it can be bonded by light pressure, and can be quickly peeled off without contaminating the bonded surface. In the adhesive, high molecular weight polyisobutylene and methyl vinyl silicone rubber are used to form the adhesive matrix, which has a dual-continuous phase network structure, plays a skeleton role, improves elasticity and cohesive strength, uses low molecular weight polyisobutylene as a tackifier, provides appropriate viscosity, and the plasticizer uses a compound of cycloalkyl base oil and chain alkyl base oil, which can increase the molecular distance of the matrix, enhance the compatibility of the matrix with low molecular weight polyisobutylene, improve the fluidity of the adhesive, and reduce the modulus. The antioxidant plays an antioxidant role.

[0009] Furthermore, in the above-mentioned anti-residue PE protective film, the high molecular weight polyisobutylene is selected from at least one of Oppanol B30, Oppanol B50, and Oppanol B80; the methyl vinyl silicone rubber is selected from at least one of methyl vinyl silicone rubber 110-1, methyl vinyl silicone rubber 110-2, and methyl vinyl silicone rubber 110-3; the low molecular weight polyisobutylene is selected from at least one of PB1300, PB1400, and PB2400; and the antioxidant is selected from at least one of antioxidant 1010, antioxidant 1076, antioxidant 245, and antioxidant 168.

[0010] Furthermore, in the above-mentioned anti-residue PE protective film, the plasticizer is a mixed oil of different carbon structures prepared by mixing a cycloalkyl base oil CT0 with typical cycloalkyl characteristics and a chain alkyl base oil CT10 with typical chain alkyl characteristics.

[0011] The cycloalkyl base oil CT0 with typical cycloalkyl characteristics has lower viscosity and better fluidity, which can improve the liquid fluidity of the adhesive. The chain alkyl base oil CT10 with typical chain alkyl characteristics has higher viscosity and bonding properties, which can effectively enhance the bonding force of the adhesive and make the bonding part more solid and reliable. The mixed oil with different carbon structures prepared by CT0 and CT10 can be used as a plasticizer to balance the viscosity of the adhesive, so that it has higher viscosity stability at different temperatures and is not easily affected by temperature changes. In addition, since CT0 and CT10 have different molecular structures and chemical properties, they can form good interface compatibility with each other.

[0012] Furthermore, in the above-mentioned anti-residue PE protective film, the plasticizer comprises the following raw materials in parts by weight: 60-90 parts of cycloalkyl base oil CT0 and 10-40 parts of chain alkyl base oil CT10.

[0013] The present invention also relates to a method for preparing the anti-residue PE protective film, comprising the following steps: S1: First, high molecular weight polyisobutylene is put into an internal mixer, and the mixture is mixed at a temperature of 160-180° C. and a rotation speed of 50-80 r / min for 5-15 min. Then, methyl vinyl silicone rubber is put into an internal mixer, and the mixture is mixed at a temperature of 170-190° C. and a rotation speed of 50-80 r / min for 20-30 min. Then, the mixture is pressed into a sheet by a flat vulcanizer to obtain a matrix sheet for standby use. S2: low molecular weight polyisobutylene, plasticizer, and antioxidant are added to the stirrer in sequence, the temperature of the stirrer is maintained at 150-170° C., nitrogen is passed to replace the air in the stirrer, and stirring is started; S3: When the low molecular weight polyisobutylene, plasticizer and antioxidant are completely melted, the above substrate sheets are added to the stirrer in batches, nitrogen is passed to replace the air in the stirrer, and stirring is continued; S4: When the system is stirred until it becomes a uniform viscous liquid, the stirring is stopped to obtain an adhesive; S5: coating the above adhesive on the surface-treated PE original film to obtain an anti-residue PE protective film.

[0014] Furthermore, in the method for preparing the above-mentioned anti-residue PE protective film, the temperature of the adhesive is controlled at 150-150° C. when it is discharged, and then it is immediately coated on the surface-treated PE original film.

[0015] Furthermore, in the method for preparing the above-mentioned anti-residue PE protective film, the surface treatment of the PE original film includes at least one of chlorine plasma treatment, corona treatment, and oxygen plasma treatment.

[0016] Preferably, the original PE film is sequentially subjected to corona treatment, chlorine plasma treatment and oxygen plasma treatment.

[0017] The present invention also relates to the application of the anti-residue PE protective film, and the anti-residue PE protective film is applied to the protection of decorative panels of large valuable items.

[0018] Flatly sticking the anti-residue PE protective film on the decorative panels of large valuable items can effectively prevent scratches and scratches on the surface of the decorative panels of large valuable items during use.

[0019] Compared with the prior art, the present invention has the following beneficial effects: (1) The anti-residue PE protective film disclosed in the present invention is reasonably designed. First, the surface of the PE original film is treated to increase its surface roughness, further improving the adsorption capacity of the PE original film and the adhesive, thereby reducing the situation where the adhesive layer is left when the PE protective film is removed; second, the formula of the adhesive is optimized to make the adhesive layer and the PE original film have better adaptability and appropriate peel strength. After the PE protective film is pasted, it is not easy to fall off and can play a protective role for a long time. At the same time, the appropriate peel strength will not leave adhesive on the surface when it is torn and pasted; (2) The anti-residue PE protective film disclosed in the present invention provides a formula of an adhesive, wherein a high molecular weight polyisobutylene and methyl vinyl silicone rubber are used to form the adhesive matrix, which has a dual-continuous phase network structure and acts as a skeleton to improve elasticity and cohesive strength. A low molecular weight polyisobutylene is used as a tackifier to provide appropriate viscosity. A plasticizer is a compound of cycloalkyl base oil and chain alkyl base oil, which can increase the molecular distance of the matrix, enhance the compatibility of the matrix with the low molecular weight polyisobutylene, improve the fluidity of the adhesive, and reduce the modulus. The antioxidant acts as an antioxidant. (3) The preparation method of the anti-residue PE protective film proposed in the present invention is simple and highly flexible, and can be mass-produced; (4) The application of the anti-residue PE protective film proposed in the present invention, by flatly attaching the anti-residue PE protective film on the decorative panels of large valuable items, can effectively prevent the surface of the decorative panels of large valuable items from being scratched or scratched during use. DETAILED DESCRIPTION

[0020] The following will combine Comparative Example 1, Example 1 and specific experimental data to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. The following comparative example 1 and example 1 provide an anti-residue PE protective film and a preparation method thereof.

[0021] Comparative Example 1 The anti-residue PE protective film of Comparative Example 1 comprises a PE original film (width and thickness are respectively The thickness of the adhesive layer is 15 μm. The adhesive layer is prepared by coating the PE original film with an adhesive. The adhesive layer has a thickness of 15 μm. The adhesive comprises the following raw materials in parts by weight: 75 parts of high molecular weight polyisobutylene Oppanol B80, 25 parts of methyl vinyl silicone rubber 110-2, 40 parts of low molecular weight polyisobutylene PB1400, 60 parts of plasticizer (80 parts of cycloalkyl base oil CT0, 20 parts of chain alkyl base oil CT10), 2 parts of antioxidant 1076, and 1 part of antioxidant 168.

[0022] The preparation method of the anti-residue PE protective film of Comparative Example 1 comprises the following steps: S1: According to the formula of the above adhesive, prepare the components; first put the high molecular weight polyisobutylene Oppanol B80 into the internal mixer, and mix it at a temperature of 170°C and a speed of 60r / min for 10min, then put the methyl vinyl silicone rubber 110-2 into the internal mixer, and mix it at a temperature of 180°C and a speed of 60r / min for 25min, and then press it into a sheet by a flat vulcanizer to obtain a base sheet for standby use; S2: low molecular weight polyisobutylene PB1400, plasticizer, antioxidant 1076, and antioxidant 168 are added to the stirrer in sequence, the temperature of the stirrer is maintained at 160° C., nitrogen is passed to replace the air in the stirrer, and stirring is started; S3: After the low molecular weight polyisobutylene PB1400, plasticizer, antioxidant 1076 and antioxidant 168 are completely melted, the above substrate sheets are added to the stirrer in batches, nitrogen is passed to replace the air in the stirrer, and stirring is continued; S4: When the system is stirred until it becomes a uniform viscous liquid (2-3h), stop stirring to obtain an adhesive; S5: The above adhesive is evenly coated on the original PE film to prepare the anti-residue PE protective film of Comparative Example 1.

[0023] Example 1 The anti-residue PE protective film of Example 1 comprises a PE original film (width and thickness are respectively The thickness of the adhesive layer is 15 μm. The adhesive layer is prepared by coating the surface-treated PE original film with an adhesive. The thickness of the adhesive layer is 15 μm. The adhesive comprises the following raw materials in parts by weight: 75 parts of high molecular weight polyisobutylene Oppanol B80, 25 parts of methyl vinyl silicone rubber 110-2, 40 parts of low molecular weight polyisobutylene PB1400, 60 parts of plasticizer (80 parts of cycloalkyl base oil CT0, 20 parts of chain alkyl base oil CT10), 2 parts of antioxidant 1076, and 1 part of antioxidant 168.

[0024] The method for preparing the anti-residue PE protective film of Example 1 includes surface treatment of the original PE film and preparation and coating of an adhesive.

[0025] The surface treatment of the original PE film includes the following contents: the original PE film is sequentially subjected to corona treatment, chlorine plasma treatment and oxygen plasma treatment.

[0026] Corona treatment: The output power of the corona machine is 10kW, the frequency is adjusted to 15kHz, the treatment voltage is 15kV, and the treatment time is 1min.

[0027] Chlorine plasma treatment: The power of the plasma etcher is 500 W, the DC bias voltage is 200 V, the gas is Cl2 / He, the flow rate is 30 sccm / 8 sccm, and the treatment time is 2 min.

[0028] Oxygen plasma treatment: The power of the plasma etcher is 500 W, the DC bias voltage is 200 V, the gas is O2 / He, the flow rate is 30 sccm / 8 sccm, and the treatment time is 1 min.

[0029] Wherein, the preparation and coating of the adhesive comprises the following steps: S1: According to the formula of the above adhesive, prepare the components; first put the high molecular weight polyisobutylene Oppanol B80 into the internal mixer, and mix it at a temperature of 170°C and a speed of 60r / min for 10min, then put the methyl vinyl silicone rubber 110-2 into the internal mixer, and mix it at a temperature of 180°C and a speed of 60r / min for 25min, and then press it into a sheet by a flat vulcanizer to obtain a base sheet for standby use; S2: low molecular weight polyisobutylene PB1400, plasticizer, antioxidant 1076, and antioxidant 168 are added to the stirrer in sequence, the temperature of the stirrer is maintained at 160° C., nitrogen is passed to replace the air in the stirrer, and stirring is started; S3: After the low molecular weight polyisobutylene PB1400, plasticizer, antioxidant 1076 and antioxidant 168 are completely melted, the above substrate sheets are added to the stirrer in batches, nitrogen is passed to replace the air in the stirrer, and stirring is continued; S4: When the system is stirred until it becomes a uniform viscous liquid (2-3h), stop stirring to obtain an adhesive; S5: The adhesive is evenly coated on the surface-treated PE original film to obtain the anti-residue PE protective film of Example 1.

[0030] Effect verification: The performance of the anti-residue PE protective films prepared in the above-mentioned comparative example 1 and embodiment 1 was tested.

[0031] Test materials: Based on the current mainstream decorative panel products in the market, four representative decorative panels were selected. The surface finishing materials of the four decorative panels are shown in Table 1.

[0032] Table 1 Surface finishing materials of four veneer panels The anti-residue PE protective films prepared in Comparative Example 1 and Example 1 were directly pasted on the front of the four decorative panels by a flat laminating machine. The comparative example 1-triamine decorative panel was sample 1, the comparative example 1-UV decorative panel was sample 2, the comparative example 1-PVC decorative panel was sample 3, the comparative example 1-PVC decorative panel was sample 4, the example 1-triamine decorative panel was sample 5, the example 1-UV decorative panel was sample 6, the example 1-PVC decorative panel was sample 7, and the example 1-PVC decorative panel was sample 8. Samples 1-8 were tested and analyzed.

[0033] Test analysis: The peel strength test was conducted in accordance with GB / T 2792-2014 "Test Method for Peel Strength of Adhesive Tapes". The anti-residue performance was conducted in accordance with the relevant test standards of ASTM D3359 Standard Test Methods for Rating Adhesion by Tape Test. The test results are shown in Table 2.

[0034] Table 2 Test results of samples 1-8 It can be seen from Table 2 that the peel strength adaptability of the PE protective film is related to the type of decorative panel, and different decorative panels have different corresponding peel strengths. The peel strength of samples 1-8 of the present invention is between , and this peel strength is more suitable. After the PE protective film is pasted on the decorative panel, it is not easy to fall off and can play a protective role for a long time. At the same time, the anti-residue rate of samples 1-4 of the present invention is compared with the anti-residue rate of samples 5-8. On the same type of decorative panels, the samples using the surface-treated PE original film have a higher anti-residue rate than the samples directly using the PE original film, indicating that surface treatment of the PE original film can reduce the situation where the glue layer is left when the PE protective film is evacuated. Generally, when the anti-residue rate reaches a value of 91% or higher, it means that after the PE protective film is removed, no residue or traces can be seen on the surface by the naked eye.

[0035] The present invention has many specific application paths, and the above is only a preferred embodiment of the present invention. It should be pointed out that the above embodiments are only used to illustrate the present invention, and are not used to limit the protection scope of the present invention. For those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. An anti-residue PE protective film, characterized in that: It comprises a PE original film; a glue layer is arranged on the upper surface of the PE original film; wherein the glue layer is prepared by coating an adhesive on the surface-treated PE original film, and the adhesive comprises the following raw materials in parts by weight: 60-100 parts of high molecular weight polyisobutylene, 10-50 parts of methyl vinyl silicone rubber, 10-50 parts of low molecular weight polyisobutylene, 30-70 parts of plasticizer, and 1-5 parts of antioxidant; wherein the plasticizer is a compound of cycloalkyl base oil and chain alkyl base oil.

2. The anti-residue PE protective film according to claim 1, characterized in that: The high molecular weight polyisobutylene is selected from at least one of Oppanol B30, Oppanol B50, and Oppanol B80; the methyl vinyl silicone rubber is selected from at least one of methyl vinyl silicone rubber 110-1, methyl vinyl silicone rubber 110-2, and methyl vinyl silicone rubber 110-3; the low molecular weight polyisobutylene is selected from at least one of PB1300, PB1400, and PB2400; the antioxidant is selected from at least one of antioxidant 1010, antioxidant 1076, antioxidant 245, and antioxidant 168.

3. The anti-residue PE protective film according to claim 1, characterized in that: The plasticizer is a mixed oil of different carbon structures prepared by mixing a naphthenic base oil CT0 with typical naphthenic characteristics and a paraffinic base oil CT10 with typical paraffinic characteristics.

4. The anti-residue PE protective film according to claim 3, characterized in that: The plasticizer comprises the following raw materials in parts by weight: 60-90 parts of cycloalkyl base oil CT0 and 10-40 parts of chain alkyl base oil CT10.

5. The method for preparing the anti-residue PE protective film according to any one of claims 1 to 4, characterized in that: The steps include: S1: First, high molecular weight polyisobutylene is put into an internal mixer, and the mixture is mixed at a temperature of 160-180° C. and a rotation speed of 50-80 r / min for 5-15 min. Then, methyl vinyl silicone rubber is put into an internal mixer, and the mixture is mixed at a temperature of 170-190° C. and a rotation speed of 50-80 r / min for 20-30 min. Then, the mixture is pressed into a sheet by a flat vulcanizer to obtain a matrix sheet for standby use. S2: low molecular weight polyisobutylene, plasticizer, and antioxidant are added to the stirrer in sequence, the temperature of the stirrer is maintained at 150-170° C., nitrogen is passed to replace the air in the stirrer, and stirring is started; S3: When the low molecular weight polyisobutylene, plasticizer and antioxidant are completely melted, the above substrate sheets are added to the stirrer in batches, nitrogen is passed to replace the air in the stirrer, and stirring is continued; S4: When the system is stirred until it becomes a uniform viscous liquid, the stirring is stopped to obtain an adhesive; S5: coating the above adhesive on the surface-treated PE original film to obtain an anti-residue PE protective film.

6. The method for preparing the anti-residue PE protective film according to claim 5, characterized in that: The temperature of the adhesive is controlled at 150-150° C. when it is discharged, and then it is immediately coated on the surface-treated PE original film.

7. The method for preparing the anti-residue PE protective film according to claim 5, characterized in that: The surface treatment of the original PE film includes at least one of chlorine plasma treatment, corona treatment, and oxygen plasma treatment.

8. The use of the anti-residue PE protective film according to any one of claims 1 to 4, characterized in that: The anti-residue PE protective film is used for protecting decorative panels of large valuable items.

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