CN212610398U

CN212610398U - Paint surface protective film

Info

Publication number: CN212610398U
Application number: CN202020725444.2U
Authority: CN
Inventors: 王岩; 张江凤; 吕鑫; 李玉
Original assignee: Punofi New Materials Co ltd
Current assignee: Punofi New Materials Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-02-26
Anticipated expiration: 2030-05-06

Abstract

The utility model relates to a macromolecular material, concretely relates to paint surface protection film. The problem of the restoration coating to substrate layer infiltration in order to solve current finish protection film, the utility model provides a finish protection film. The protective film sequentially comprises a protective layer (70), a repair coating (10), an anti-seepage layer (20), a cross-linkable layer (60), a base material layer (30), a mounting glue layer (40) and a release layer (50). The paint surface protective film is additionally provided with the anti-infiltration layer between the repair coating and the base material layer, so that the problem that the repair coating permeates into the base material layer is solved. Moreover, the utility model provides a lacquer painting protection film is soft before the installation, easily installs.

Description

Paint surface protective film

Technical Field

The utility model relates to a macromolecular material, concretely relates to paint surface protection film.

Background

Nowadays, automobiles are gradually becoming necessities of every family, and car owners pay more and more attention to the protection of automobiles and the health of drivers and passengers, so that some commodities such as automobile window films, glass shields, Paint Protection Films (PPF), vehicle-mounted air purifiers and the like are purchased to strengthen the protection of the automobiles and the passengers. Among them, the paint protective film, also called "invisible car cover", is a layer of transparent protective film attached to the surface of the car body, and the main function is to protect the original factory car paint of the car from being damaged. This product not only has mar self-repairing function, can effectually prevent to scrape and beat with the hitting of sand grain, has still completely cut off the contact of car lacquer with the air, can prevent the corruption to the automobile body finish such as acid rain, insect, bird manure. Meanwhile, the paint surface protective film is high in definition and brightness, the brightness of the automobile paint surface can be improved and protected, and the paint surface is prevented from rusting and aging and yellowing. After the paint surface protective film is torn off, the original factory vehicle paint cannot be damaged, and the value of second-hand transaction is improved.

The product structure of the paint surface protective film is shown in fig. 1, the paint surface protective film generally comprises a protective layer (1), a repair coating (2), a base material layer (3), an installation glue layer (4) and a release layer (5), the protective layer is a protective film, the release layer is a release film, the surface of some products does not have the protective film, and after the protective layer (protective film) is torn off and the release layer (release film), the protective film is pasted on the surface of the vehicle paint through the installation glue to play a role in protecting the vehicle paint. The base material layer of the paint surface protective film mainly comprises two materials, one material is a thermoplastic polyurethane elastomer (TPU) material, and the base material layer is a high-end product on the market, is easy to stretch and install, is good in yellowing resistance, and therefore is longer in quality guarantee period.

The TPU used for the paint surface protective film is generally selected from aliphatic TPU materials, and the materials have excellent yellowing resistance, excellent mechanical properties and dimensional stability, so that the finished paint surface protective film has long-term yellowing resistance, hydrolysis resistance, small shrinkage and other excellent properties. Through years of tests, the TPU material becomes the most suitable base material layer of the paint surface protective film on the market.

The repairing coating is positioned on the TPU, is also the top layer which is contacted with air, rainwater, wind sand and various pollutants, has a scratch repairing function, resists the external pollutants from permeating into the PPF, and avoids influencing the transparency of the product.

However, TPU films also have problems in repair coating application. Because the TPU is crosslinked through intermolecular hydrogen bonds or slightly crosslinked among macromolecular chains, the intermolecular acting force is reduced in the presence of an organic solvent, a crosslinked structure is opened, so that the solvent can carry part of the repair coating to penetrate into the internal structure of the TPU, the thickness of the repair coating is directly related to the repairability, the stain resistance and the solvent resistance of the paint surface protective film, and the thicker the repair coating is, the better the performances are, so that the penetrated repair coating can not play a role in protecting the TPU. Therefore, the effective thickness of the repair coating can be reduced by the infiltration of the repair coating, the thickness of the repair coating cannot reach the thickness of the repair coating designed originally, the repair coating is thinned, the protection of the repair coating on a product is weakened, and raw materials are wasted. On the other hand, the penetration phenomenon is greatly influenced by the fluctuation of the production of the TPU film and different temperatures and times during the coating of the repair coating, so that the paint surface protective films produced in different batches are easy to have great quality fluctuation.

In addition, the hardness of the repair coating determines the stain resistance and corrosion resistance of the paint protective film, and the harder the hardness, the stronger the stain resistance and corrosion resistance. Thus, paint protective film products tend to have hard-to-hardness repair coatings. However, the higher the hardness of the repair coating, the more difficult the hardness of the whole product is to be increased and stretched, and the installation is very difficult.

Disclosure of Invention

The problem of the restoration coating to substrate layer infiltration in order to solve current finish protection film, the utility model provides a finish protection film. The paint surface protective film is additionally provided with the anti-infiltration layer between the repair coating and the base material layer, so that the problem that the repair coating permeates into the base material layer is solved.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a paint surface protection film, the protection film is including repairing coating (10), prevention of seepage and going into layer (20), substrate layer (30), installation glue film (40) and leaving type layer (50) in proper order.

Further, the protective film sequentially comprises a protective layer (70), a repair coating (10), an anti-seepage layer (20), a base material layer (30), a mounting glue layer (40) and a release layer (50).

Further, the base material layer is a TPU layer. The protective layer is a protective film. The release layer is a release film.

Furthermore, the TPU substrate layer is preferably aliphatic TPU, and the thickness of the TPU substrate layer is 50-250 μm.

The protective film may also be omitted, typically a polyethylene terephthalate (PET) film, of the type comprising a pure PET film, a silicone-coated PET film and a PET film comprising a UV-hardening layer, the silicone layer or UV-hardening layer being intermediate the protective film and the repair coating, the protective film typically having a thickness of 12 μm to 75 μm.

The release film layer is generally white frosted PET silicon release film, and the thickness is generally 36-80 μm.

The mounting glue layer is generally a polyacrylic or polyurethane material, and the thickness is generally 7-50 μm. Furthermore, a bottom coating layer is arranged between the substrate layer and the mounting adhesive layer, so that the adhesive force between the mounting adhesive layer and the substrate layer is increased, and the situation that the adhesive force is remained on the paint surface of the automobile after the film is torn off from the automobile is avoided.

The thickness of the repair coating is 5-50 μm, preferably 5-30 μm, and more preferably 7-25 μm. The repair coating is selected from polyurethane or acrylic resin materials.

The anti-seepage layer is introduced, the anti-seepage layer is preferably a net-shaped polyurethane material, molecular chains can be bonded in the three-dimensional direction, the solvent and the repair coating layer can be greatly prevented from permeating into the TPU substrate layer in the coating process of the repair coating layer, the thickness of the repair coating layer is ensured, and the quality of the repair coating layer is ensured.

The embodiment of the anti-infiltration layer is based on TPU materials, and a reticular structure is formed through radiation crosslinking or thermal crosslinking.

Further, the anti-seepage layer comprises a TPU material, an irradiation-assisted cross-linking material and a sensitizer. The dosage of the irradiation-assisted cross-linking material and the sensitizing agent is the common dosage.

The radiation crosslinking mode is a process of increasing radiation crosslinking on the TPU material, and various radiations are utilized to initiate crosslinking reaction between polyurethane high-molecular long chains of the anti-infiltration layer so as to convert the linear polyurethane into a net structure, wherein the radiation refers to electron beams, gamma rays, neutron beams, particle beams and the like. The irradiated TPU surface can be crosslinked to a certain degree, in order to achieve the purpose of further increasing the mutual crosslinking among the TPUs, an irradiation-assisted crosslinking material and a sensitizer can be additionally added into the TPU material besides the existing TPU formula, and the irradiation-assisted crosslinking material and the sensitizer can contribute to the crosslinking of the TPU under the stimulation of irradiation to form an anti-infiltration layer.

The thermal crosslinking mode is that one or more triisocyanates and polyurethane crosslinking catalysts are added in the TPU casting formula, and an anti-infiltration layer is formed after heating and crosslinking.

The thickness of the anti-infiltration layer is 2-30 μm.

The invention also provides a method for improving the installation performance of the paint protective film. On the one hand, if the surface repair coating of the current paint protective film is too hard, the mountability of the paint protective film needs to be improved. On the other hand, since the invention adds the structure of the penetration preventing layer, the product hardness of the paint protective film increases, resulting in deterioration of the product mountability. Therefore, to solve this problem, the present solution adds a crosslinkable TPU layer.

Through increasing the cross-linkable layer, the paint protective film improves the softness of the product before installation, improves the installation performance of the product, and solves the problems of high hardness and difficult installation of the existing paint protective film.

Further, the protective film also comprises a cross-linkable layer (60), and the cross-linkable layer is arranged between the anti-infiltration layer and the mounting adhesive layer.

Further, the protective film sequentially comprises a protective layer (70), a repair coating (10), an anti-seepage layer (20), a cross-linkable layer (60), a base material layer (30), a mounting glue layer (40) and a release layer (50).

Further, the crosslinkable layer is a crosslinkable TPU layer.

Further, the protection film includes protective layer, restoration coating, prevention of seepage and goes into layer, substrate layer, cross-linkable layer, installation glue film and from the type layer in proper order.

Further, the protection film includes protective layer, restoration coating, prevention of seepage and goes into layer, first substrate layer, cross-linkable layer, second substrate layer, installation glue film and from the type layer in proper order.

Furthermore, the thickness of the crosslinkable layer is 15-100 μm, and the thicknesses of the first substrate layer and the second substrate layer are 50-150 μm respectively.

Further, the thickness of the crosslinkable TPU layer is 15 μm to 100 μm. The first base material layer and the second base material layer are TPU base material layers respectively. The thickness of the TPU base material layer is 50-150 mu m.

The purpose of increasing the crosslinkable TPU layer is to increase the flexibility of the paint surface protective film before installation and improve the easy installation of the product. The crosslinkable TPU can be positioned between the anti-penetration layer and the TPU substrate layer or positioned below the TPU substrate layer.

Before the crosslinkable TPU layer is installed, the molecular chains of the layer are in an uncrosslinked structure, so that the layer is soft and good in stretching as a whole. This layer contains ultraviolet light (UV) cross-linking agent, can receive the shining of sunlight after the lacquer painting protection film pastes the car, and the UV light that the sunlight contains can impel this layer of molecule to take place slowly to crosslink and become network structure, also can use powerful ultraviolet lamp to shine certainly for the rapid crosslinking of crosslinkable TPU layer reaches final condition. The hardness and elasticity of the whole paint surface protective film product can be increased after crosslinking, and the resistance to external impact can be enhanced.

The invention has the advantage that the anti-infiltration layer is added in the structure. The anti-infiltration layer aims to prevent the repair coating from infiltrating into the TPU substrate layer, so that the actual use thickness of the repair coating and the product quality of the final paint surface protective film are ensured. In addition, the invention also provides a paint surface protective film added with the crosslinkable TPU layer, so that the installation performance of the product is improved, and the crosslinkable TPU layer is softer before installation, so that the product is easy to install. After installation, the crosslinkable layer can be hardened under the irradiation of sunlight/UV light, and can also play a role in resisting external impact.

The repair coating, the anti-seepage layer, the crosslinkable TPU layer and the TPU layer are all made of polyurethane materials, are good in compatibility and do not have layering risk. The repairing coating, the anti-seepage layer and the crosslinkable TPU layer are all of a crosslinked molecular structure, so that the effects of resisting pollution and solvents can be achieved, and the pollution resistance of a final product is improved. In addition, the TPU is preferably cross-linked polyurethane, and the cross-linked polyurethane has better thermal stability, better dimensional stability in the sun exposure and high-temperature environment and no shrinkage or edge warping.

Compared with the prior art, the utility model provides a restoration coating of lacquer painting protection film can not be to the substrate layer infiltration, has guaranteed the use thickness of restoration coating and resistant dirty, resistant scraping's performance. Moreover, the utility model provides a lacquer painting protection film is soft before the installation, easily installs.

Drawings

FIG. 1 is a schematic structural diagram of a conventional paint protective film;

fig. 2 is a schematic structural diagram of a paint protective film provided by the present invention;

fig. 3 is a schematic structural view of another paint protective film provided by the present invention;

fig. 4 is a schematic structural diagram of another paint protective film provided by the present invention.

Detailed Description

In order to make the structure and features and advantages of the present invention easier to understand, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

as shown in fig. 2, the utility model provides a paint surface protective film, the protective film includes in proper order repair coating (10), prevents that seepage goes into layer (20), substrate layer (30), installation glue film (40) and leaves type layer (50).

Example 1

As shown in fig. 3, the utility model provides a paint surface protective film, the protective film includes protective layer (70), restoration coating (10), prevention of seepage and goes into layer (20), substrate layer (30), installation glue film (40) and from type layer (50) in proper order. Wherein the content of the first and second substances,

the anti-infiltration layer is prepared by weighing the following raw materials in parts by weight: 87 parts of TPU particles (ESTANE ALRCLC93A-V, produced by Lubrizol company), 3 parts of radiation-assisted cross-linking material bisphenol A epoxy acrylate, 1.5 parts of sensitizer triallyl isocyanurate (TAIC), 0.5 part of antioxidant, 1 part of light stabilizer, 1 part of lubricant and 5 parts of ultraviolet absorber. Putting the TPU particles into an oven to be dried for 1.5h at 95 ℃, then putting all raw materials into a high-speed mixer to be stirred, and then carrying out basic granulation by a double-screw extruder, wherein the rotating speed of a main machine of the double-screw extruder is 250r/min, the extrusion temperature is 165 ℃, and the obtained particles are granulated and dried for 1.5h at 95 ℃.

The TPU substrate layer is prepared by weighing the following raw materials in parts by weight: 92.5 parts of TPU particles (L ESTANE ALRCLC93A-V, ubrizol), 0.5 part of antioxidant, 1 part of light stabilizer, 1 part of lubricant and 5 parts of ultraviolet light absorber, and the TPU particles, the antioxidant, the lubricant and the ultraviolet light absorber are uniformly mixed and then baked for 1.5 hours at 95 ℃.

Taking out the dried raw materials, melting the raw materials by 2 twin-screw extruders, extruding the raw materials, casting a polyester carrier with a peelable coating to form a film, wherein the structures from top to bottom are an anti-infiltration layer, a TPU base material layer and a polyester carrier layer respectively, the thicknesses of the anti-infiltration layer and the TPU base material layer are respectively 30 micrometers and 120 micrometers, the total thickness is 150 micrometers, and then the anti-infiltration layer is crosslinked by irradiation crosslinking with the irradiation dose of 10 Mrad.

And then tearing off the polyester carrier at the bottommost layer, coating mounting glue on the exposed air surface of the TPU substrate layer and coating a release film layer, wherein the dry glue thickness of the mounting glue layer is 30 micrometers. And coating a repair coating on the surface of the uppermost anti-infiltration layer exposed to the air, coating a PET (polyethylene terephthalate) protective film with silica gel after passing through an oven, wherein the thickness of the repair coating is 12 mu m. The anti-seepage paint surface protective film of the utility model can be obtained.

Example 2

As shown in fig. 4, the utility model provides a paint surface protective film, the protective film includes protective layer (70), repair coating (10), prevention of seepage and goes into layer (20), cross-linkable layer (60), substrate layer (30), installation glue film (40) and from type layer (50) in proper order. Wherein the crosslinkable layer (60) is a crosslinkable TPU layer,

the anti-infiltration layer is prepared by weighing the following raw materials in parts by weight: 91 parts of TPU particles (ESTANE ALRCLC93A-V, produced by Lubrizol company), 3 parts of radiation-assisted cross-linking material bisphenol A epoxy acrylate, 1.5 parts of sensitizer triallyl isocyanurate (TAIC), 0.5 part of antioxidant, 1 part of light stabilizer, 1 part of lubricant and 2 parts of ultraviolet absorber. Putting the TPU particles into an oven to be dried for 1.5h at 95 ℃, then putting all raw materials into a high-speed mixer to be stirred, and then carrying out basic granulation by a double-screw extruder, wherein the rotating speed of a main machine of the double-screw extruder is 250r/min, the extrusion temperature is 165 ℃, and the obtained particles are granulated and dried for 1.5h at 95 ℃.

The crosslinkable TPU layer was first weighed into a glass bottle 1.8g of 2-hydroxyethyl methacrylate (2-HEMA), 8.09g of 1, 4-butanediol, 10g of trimethylolpropane trimethacrylate (TMPTMA) and 0.388g of photoinitiator (Irgacure 184). 36.7g of polycaprolactone polyol and 43g of isocyanate were then added. A further 0.0018g of stannous octoate was added, the reaction mixture was stirred with a laboratory mixer and then poured into a heated mold set on a hot plate at 120 ℃ and cured on the hot plate for about 30 minutes and then in an oven at 100 ℃ for 24 hours. Then cutting the obtained polymer into small blocks of 0.1-0.2g, and weighing the raw materials according to the following weight formula: 97.5 parts of polymer, 0.5 part of antioxidant, 1 part of light stabilizer and 1 part of lubricant, and the components are uniformly mixed and dried for 1.5 hours at 95 ℃.

The TPU substrate layer is prepared by weighing the following raw materials in parts by weight: 92.5 parts of TPU particles (ESTANE ALRCLC93A-V, produced by Lubrizol corporation), 0.5 part of antioxidant, 1 part of light stabilizer, 1 part of lubricant and 5 parts of ultraviolet light absorber, and the mixture is evenly mixed and dried for 1.5 hours at 95 ℃.

Taking out the dried raw materials, melting the raw materials by 3 twin-screw extruders, extruding the raw materials, casting a polyester carrier with a strippable coating to form a film, wherein the structures from top to bottom are an anti-infiltration layer, a crosslinkable TPU layer, a TPU base material layer and a polyester carrier layer respectively, the thicknesses of the anti-infiltration layer, the crosslinkable TPU layer and the TPU base material layer are respectively 30 micrometers, 70 micrometers and 50 micrometers, and are 150 micrometers in total, and then irradiating the anti-infiltration layer with the irradiation dose of 10Mrad to enable the anti-infiltration layer to be crosslinked.

And then tearing off the polyester carrier at the bottommost layer, coating mounting glue on the exposed air surface of the TPU substrate layer and coating a release film layer, wherein the dry glue thickness of the mounting glue layer is 25 mu m. And coating a repair coating on the surface of the uppermost anti-infiltration layer exposed to the air, and coating a PET protective film after passing through an oven, wherein the thickness of the repair coating is 15 mu m. The penetration-resistant easy-to-install paint surface protective film can be obtained, after the protective film is installed on a vehicle, the crosslinkable TPU layer can be continuously crosslinked through sunlight irradiation, and the impact resistance of the product is enhanced.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the present invention are covered by the scope of the present invention.

Claims

1. The paint surface protective film is characterized by sequentially comprising a repair coating (10), an anti-seepage layer (20), a base material layer (30), a mounting glue layer (40) and a release layer (50).

2. The paint protective film according to claim 1, characterized in that it comprises, in sequence, a protective layer (70), a repair coating (10), an anti-penetration layer (20), a substrate layer (30), a mounting glue layer (40) and a release layer (50).

3. The paint protective film according to claim 1 or 2, further comprising a crosslinkable layer (60) interposed between the anti-penetration layer and the mounting adhesive layer.

4. The paint protective film according to claim 3, characterized in that it comprises, in sequence, a protective layer (70), a repair coating (10), an anti-infiltration layer (20), a crosslinkable layer (60), a substrate layer (30), a mounting glue layer (40) and a release layer (50).

5. The paint protective film of claim 3 wherein the cross-linkable layer is a cross-linkable TPU layer.

6. The paint protective film according to claim 3, wherein the protective film comprises a protective layer, a repair coating layer, an anti-penetration layer, a base material layer, a crosslinkable layer, a mounting adhesive layer and a release layer in this order.

7. The paint protective film according to claim 3, wherein the protective film comprises a protective layer, a repair coating layer, an anti-penetration layer, a first substrate layer, a crosslinkable layer, a second substrate layer, a mounting adhesive layer and a release layer in this order.

8. The paint protective film according to claim 2, wherein the protective layer has a thickness of 12 μm to 75 μm, the base layer has a thickness of 50 μm to 250 μm, the mounting adhesive layer has a thickness of 7 μm to 50 μm, and the repair coat layer has a thickness of 5 μm to 50 μm.

9. The paint protective film according to claim 1 or 2, wherein the penetration preventing layer has a thickness of 2 to 30 μm.

10. The paint protective film according to claim 3, wherein the thickness of the crosslinkable layer is 15 μm to 100 μm.