CN213596198U - Paint surface protective film - Google Patents

Paint surface protective film Download PDF

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Publication number
CN213596198U
CN213596198U CN202020726262.7U CN202020726262U CN213596198U CN 213596198 U CN213596198 U CN 213596198U CN 202020726262 U CN202020726262 U CN 202020726262U CN 213596198 U CN213596198 U CN 213596198U
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layer
repair coating
protective film
coating
installation
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CN202020726262.7U
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王岩
张江凤
吕鑫
李玉
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Punofi New Materials Co ltd
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Punofi New Materials Co ltd
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Abstract

The utility model relates to a macromolecular material, concretely relates to paint surface protection film. The problem of the restoration coating hardness height, the difficult installation of solving current lacquer painting protection film, the utility model provides a lacquer painting protection film. The protective film comprises a protective layer, a flexible repairing coating, a base material layer, an installation glue layer and a release layer in sequence. The paint surface protective film increases the softness of the product before installation and improves the installation performance of the product.

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, a paint protective film is a recently emerging product.
A paint protective film, also called a "invisible car cover", is a layer of transparent protective film attached to the surface of a car body, and mainly functions to protect the original factory paint of the car from damage. 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. The product structure of the paint surface protective film is shown in figure 1, the paint surface protective film generally comprises a protective film (1), a repair coating (2), a TPU (thermoplastic polyurethane) base material layer (3), an installation adhesive layer (4) and a release layer (5), 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 attached to the surface of the vehicle paint through the installation adhesive to play a role in protecting the vehicle paint. The TPU substrate layer is soft in material, good in yellowing resistance and long in quality guarantee period. Of course, PVC is also used in the market to replace TPU paint surface protective films, but the PVC paint surface protective films gradually exit the market due to easy yellowing, poor aging resistance and the like, and the invention is not discussed here.
The current finish protection film product needs the installation of professional technician, and the installation is very consuming time and wasting power, and this is because the shape of car finish is various, and the finish protection film need just can laminate unevenness's car finish after tensile, and final PPF product outward appearance and performance can be influenced to the installation.
However, the PPF itself has some problems in its installation process due to its characteristics. The outermost layer of the paint surface protective film is a repairing coating which is in contact with air, rain, snow, sand and various pollutants, the hardness of the repairing coating determines the pollution resistance and corrosion resistance of the paint surface protective film, and the harder the hardness, the stronger the pollution resistance and corrosion resistance. Thus, current paint protective film products tend to have hard-to-hard repair coatings. However, the problem is that the higher the hardness of the repair coating, the more difficult the whole product is to be installed, and the hardness of the product is increased and stretched.
Disclosure of Invention
In order to solve the problem that the hardness of current lacquer painting protection film restoration coating is high, difficult installation, the utility model provides a lacquer painting protection film. The paint surface protective film increases the softness of the product before installation and improves the installation performance of the product.
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 includes flexible restoration coating, substrate layer, installation glue film in proper order and leaves the type layer.
Further, the protection film includes protective layer, flexible restoration coating, substrate layer, installation glue film and leaves the type layer in proper order. The protective layer is used for protecting the flexible repair coating and needs to be stripped after installation.
The hard repair coating has a large influence on the stretchability and the mountability of the PPF, so that the improvement of the hardness of the repair coating can significantly improve the mountability of the finish protective film. The invention aims to replace the existing high-hardness repair coating with a flexible repair coating, improve the stretching of a product, enable the product to be easily installed and simultaneously not reduce the pollutant resistance of the repair coating.
Two embodiments of flexible repair coatings are presented in the present invention,
(1) the flexible repair coating may be a post-curable repair coating.
Further, the protection film includes protective layer, but postcure repair coating, substrate layer, installation glue film and from the type layer in proper order.
The post-curable repair coating has low hardness before installation and is easy to install during installation, and after installation, the post-curable hard coating can be further cured after UV irradiation, so that the hardness is improved to reach the final hardness, and the paint surface protective film can play a role in protecting the paint surface.
The method comprises the steps of preparing a repair layer coating from raw materials of a post-curable repair coating, wherein the repair layer coating comprises polyester polyol, an isocyanate curing agent, a photoinitiator, an active monomer, an auxiliary agent and a solvent, coating the post-curable repair coating on a TPU substrate layer, then sending the TPU substrate layer into an oven to be baked at constant temperature or in a stage mode, wherein the baking temperature is 70-150 ℃, the baking time is 2-10min, and the repair layer coating can be subjected to primary crosslinking to form the post-curable repair coating. After baking, covering a protective layer (namely a protective film) on the surface and rolling, wherein the thickness of the post-curing repair coating is 7-50 mu m. And then coating glue on the other side of the TPU layer to form a mounting glue layer, and covering a release layer.
After the paint surface protective film is attached to the automobile body, the film surface is treated by using an ultraviolet curing machine, the ultraviolet wave band is selected from the range of 260-380nm, and the ultraviolet energy is 300-1200mJ/cm2. The final hardness is achieved only after the post-curable repair coating is cured by UV.
(2) The flexible repair coating is a combination of hard and soft coatings.
Further, the flexible repair coating comprises a hard repair coating and a soft repair coating; the protective film comprises a protective layer, a hard repair coating, a soft repair coating, a base material layer, an installation glue layer and a release layer in sequence.
Further, the flexible repair coating comprises a post-curable repair coating and a soft repair coating; the protective film comprises a protective layer, a post-curing repair coating, a soft repair coating, a base material layer, an installation glue layer and a release layer in sequence.
Further, the flexible repair coating comprises a hard repair coating and a post-curable repair coating; the protective film comprises a protective layer, a hard repair coating, a post-curing repair coating, a base material layer, an installation glue layer and a release layer in sequence.
Further, the flexible repair coating comprises a hard repair coating, a post-curable repair coating, and a soft repair coating; the protective film comprises a protective layer, a hard repair coating, a post-curing repair coating, a soft repair coating, a base material layer, an installation glue layer and a release layer in sequence.
The repair coating is made of polyurethane materials mostly, and the hardness and softness of the repair coating can be adjusted by adjusting the proportion of the soft segment part and the hard segment part in the chain segment. The hard repair coating and the soft repair coating are basically the same in raw material components, and are composed of polyester polyol, a curing agent, a catalyst, an auxiliary agent and a solvent, and the difference is as follows: the proportion of isocyanate, chain extender and cross-linker (hard segment fraction) is higher in the hard repair coating, while the proportion of polyester polyol (soft segment fraction) is higher in the soft repair coating.
The repair coating may be divided into a hard and soft two-layer structure, with only the crosslink density being different. The lower layer is a soft repair coating with thicker thickness, so that the softness of the product can be improved, and the overall installation performance of the product is improved. The upper layer is a hard repair coating with a thin thickness, and has the functions of resisting pollution and repairing scratches. This has the advantage that the hard repair coating, even if hard, does not make the entire product very hard due to the reduced thickness, and the soft repair coating can increase the softness of the entire product. PPF also has a high demand for solvent resistance, and if only one hard repair coating is used, PPF does not have good solvent resistance, and therefore, this soft repair coating must be present.
And after the common hard repair coating is changed into the post-curing repair coating, the softness of the whole product before installation can be further improved, and the hardness of the coating is improved through UV irradiation after installation.
If a hard repair coating and a post-curable repair coating are combined, the hardness of the protective film can be further enhanced and the impact resistance can be increased after the post-curable coating is cured.
Further, the thickness of the hard repair coating is 2-15 μm, and the thickness of the soft repair coating is 6-35 μm. Further, the thickness of the post-curable repair coating is 2-35 μm.
The protective layer is a protective film, and the release layer is a release film. Further, the base material layer is a TPU base material layer.
The protective film, which is typically a polyethylene terephthalate (PET) film, is of the kind pure PET film, silicone-coated PET film and PET film containing a UV-curing layer, the silicone layer or curing layer being situated between the protective film and the repair coating, the thickness of the protective film layer typically being 12 μm to 75 μm, which layer may also be unused.
The substrate layer is generally made of aliphatic TPU material, the material has excellent yellowing resistance, excellent mechanical property and size stability, and the thickness is generally 50-250 um.
Further, the protective film also comprises a crosslinkable layer, and the crosslinkable layer is arranged between the flexible repair coating and the installation glue layer.
Further, the protection film includes protective layer, flexible repair coating, cross-linkable layer, substrate layer, installation glue film and leaves the type layer in proper order.
Further, the protection film includes protective layer, flexible restoration coating, substrate layer, cross-linkable layer, installation glue film and leaves the type layer in proper order.
Further, the protection film includes protective layer, flexible restoration coating, first substrate layer, cross-linkable layer, second substrate layer, installation glue film and from the type layer in proper order.
Further, the crosslinkable layer is a crosslinkable TPU layer.
The crosslinkable TPU layer contains an Ultraviolet (UV) crosslinking agent, the paint surface protective film can be irradiated by sunlight after being attached to a vehicle, or ultraviolet light is directly adopted for irradiation, the UV light contained in the two lights can promote the crosslinkable TPU layer molecules to be crosslinked into a net structure, the hardness and the elasticity of the whole paint surface protective film product can be increased after crosslinking, and the impact resistance to the outside can be improved. Therefore, the whole softness of the paint protective film can be improved by adding the crosslinkable TPU layer structure, the easy installation performance of the product is improved, and after the product is installed on a vehicle, the product can achieve a good impact resistance effect by further crosslinking.
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, and the thickness of the TPU base material layer is 50-150 micrometers.
The mounting glue layer is typically a polyacrylic or polyurethane type material, typically between 7-50 μm thick. 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 release layer is a white frosted PET silicon release film generally, and the thickness is 36-80 μm.
The utility model provides a lacquer painting protection film has done the innovation at the restoration coating, and the purpose has improved the holistic hardness of product, has improved the installation nature of product.
The post-curable repair coating, the hard repair coating, the soft repair coating, the TPU layer and the crosslinkable layer are all selected from polyurethane materials, have good compatibility with each other and do not have the risk of layering.
Compared with the prior art, the utility model provides a paint surface protection film has improved the hardness of product, has improved the installation nature of product. The utility model provides a lacquer painting protection film is convenient for install.
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 flexible repair coating 10, substrate layer 20, installation glue film 30 and from type layer 40 in proper order.
Example 1
As shown in fig. 3, the utility model provides a paint surface protective film, the protective film includes protective layer 70, hard repair coating 10, soft repair coating 20, substrate layer 30, installation glue film 40 and from type layer 50 in proper order. Wherein,
the raw materials of the hard repair coating are firstly prepared into a hard repair coating, and the formula of the hard repair coating is as follows: 15 parts of polyester polyol A (SK9330), 20 parts of polyester polyol B (Uralac SN 822S 1-70), 18 parts of curing agent (Desmodur N3390BA), 0.5 part of catalyst (Dabco T-12), 0.9 part of flatting agent (BYK-358N), 0.02 part of defoaming agent (BYK-051), 3 parts of ultraviolet absorbent (Tinuvin-328) and 60 parts of ethyl acetate.
The soft repair coating is prepared from the following raw materials in parts by weight: 15 parts of polyester polyol A (RS861), 5 parts of polyester polyol B (Uralac SN 822S 1-70), 4 parts of curing agent (Desmodur N3390BA), 0.5 part of catalyst (Dabco T-12), 0.3 part of flatting agent (BYK-358N), 0.02 part of defoaming agent (BYK-051), 3 parts of ultraviolet absorbent (Tinuvin-328) and 60 parts of ethyl acetate.
After the formula is uniformly mixed, firstly coating the soft repair coating on the surface of the TPU substrate layer in a roller coating mode, and forming a soft repair coating after passing through a stage heating type oven within 1-5 minutes; then coating the hard repair coating, and then passing through a stage heating type oven within 1-5 minutes to form a hard repair coating; and covering a protective layer on the surface of the hard repair coating, wherein the protective layer is a UV (ultraviolet) curing PET (polyethylene terephthalate) film, the thickness of the soft repair coating is 12 mu m, and the thickness of the hard repair coating is 3 mu m.
Then at the another side coating acrylic acid glue of TPU substrate layer, thickness is 25 mu m, forms the installation glue film after stage heating formula oven, covers the white of 76 mu m thickness on the installation glue film from the type membrane, can obtain the utility model provides a finish protection film product.
Example 2
As shown in fig. 4, the utility model provides a paint surface protective film, the protective film includes protective layer 70, but postcure repair coating 10, substrate layer 20, installation glue film 30 and from type layer 40 in proper order. Wherein,
the raw materials of the post-curing repair coating are firstly prepared into the post-curing repair coating, and the coating comprises the following components in parts by weight: 40 parts of polyester polyol (SK9330), 12 parts of curing agent (Desmodur N3390BA), 3 parts of photoinitiator 1-hydroxy-cyclohexyl-phenyl ketone, 5 parts of active monomer trimethylolpropane triacrylate, 70 parts of ethyl acetate/butanone solvent, and other auxiliaries including a leveling agent, a defoaming agent, an ultraviolet absorbent, a light stabilizer and the like.
Firstly, coating acrylic pressure-sensitive adhesive on one side of a TPU substrate layer to form a mounting adhesive layer, wherein the thickness of dry adhesive is 25 mu m, and then coating a white release film with the thickness of 75 mu m. And then, coating the post-curable repair coating on the other side of the TPU substrate layer by adopting a roller coating manner to form a post-curable repair coating, wherein the dry film thickness is 15 mu m. And (3) sending the coated TPU substrate layer into an oven for baking at the baking temperature of 70-150 ℃ for 3min, and then coating a UV (ultraviolet) curing PET (polyethylene terephthalate) protective film on the surface of the post-curable repair coating.
Then after the product is arranged on a vehicle body, the surface of the post-curing repair coating is subjected to ultraviolet curing treatment, the ultraviolet light wave band is selected from 260-380nm, and the ultraviolet light energy is 300-1200mJ/cm2And obtaining the completely cured paint protective film.
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 (6)

1. The paint surface protective film is characterized by sequentially comprising a flexible repairing coating, a base material layer, an installation glue layer and a release layer;
the flexible repair coating in the protective film is a post-curable repair coating;
alternatively, the flexible repair coating comprises a hard repair coating and a soft repair coating; the protective film sequentially comprises a protective layer, a hard repair coating, a soft repair coating, a base material layer, an installation glue layer and a release layer;
alternatively, the flexible repair coating comprises a post-curable repair coating and a soft repair coating; the protective film sequentially comprises a protective layer, a post-curable repair coating, a soft repair coating, a base material layer, an installation glue layer and a release layer;
alternatively, the flexible repair coating comprises a hard repair coating and a post-curable repair coating; the protective film comprises a protective layer, a hard repair coating, a post-curing repair coating, a base material layer, an installation glue layer and a release layer in sequence.
2. The paint protective film of claim 1 further comprising a cross-linkable layer disposed between the flexible repair coating and the make coat.
3. The paint protective film according to claim 2, wherein the protective film comprises a protective layer, a flexible repair coating layer, a crosslinkable layer, a base material layer, a mounting glue layer and a release layer in this order.
4. The paint protective film according to claim 2, wherein the protective film comprises a protective layer, a flexible repair coating layer, a first substrate layer, a crosslinkable layer, a second substrate layer, a mounting glue layer and a release layer in this order.
5. The paint protective film according to claim 1, wherein the hard repair coating layer has a thickness of 2 to 15 μm and the soft repair coating layer has a thickness of 6 to 35 μm.
6. The paint protective film according to claim 1, wherein the thickness of the post-curable repair coating is 2 to 35 μm.
CN202020726262.7U 2020-05-06 2020-05-06 Paint surface protective film Active CN213596198U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020726262.7U CN213596198U (en) 2020-05-06 2020-05-06 Paint surface protective film

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Application Number Priority Date Filing Date Title
CN202020726262.7U CN213596198U (en) 2020-05-06 2020-05-06 Paint surface protective film

Publications (1)

Publication Number Publication Date
CN213596198U true CN213596198U (en) 2021-07-02

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Application Number Title Priority Date Filing Date
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Country Link
CN (1) CN213596198U (en)

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