CN112694634A

CN112694634A - Preparation method and application of film material with spectrum selective reflection colorful coating

Info

Publication number: CN112694634A
Application number: CN202011522092.1A
Authority: CN
Inventors: 余兴亮; 董亚东
Original assignee: Haian Haochi Technology Co ltd
Current assignee: Haian Haochi Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-23

Abstract

The invention relates to a preparation method of a film material with a spectrum selective reflection colorful coating, which comprises the steps of coating a spectrum selective colorful reflection coating on a corona surface of a high-light-transmission chemical-grade transparent PET film through MG, and evaporating redundant solvent on the coating surface through a transmission device and an oven; and (3) baking for 30-60S, and fixing the pitch gradient of the coated surface by a UV (ultraviolet) light curing machine through a conveying device to obtain the colorful coating film material with the spectrum selective reflection. The preparation process is simple, and the used polymer monomer is polymerized into a cross-linked polymer network, so that the high-strength high-toughness high-strength. Compared with the multilayer extrusion and film coating process, the cost is reduced; the polymer monomer has several components, can realize the independent installation of two or more molecules, forms the molecular density gradient difference, and through chiral molecule cross-linking together, can realize the interior high low refractive index collocation of same high polymer, reach accurate wave band reflection, realize dazzling various function.

Description

Preparation method and application of film material with spectrum selective reflection colorful coating

Technical Field

The invention relates to the field of automobile film materials, in particular to a preparation method and application of a film material with a spectrum selective reflection colorful coating.

Background

At present, researches on a colorful film on the market are relatively few, the colorful film on the market is mainly made of products of American 3M company, and the colorful film and the products adopt a multilayer co-extrusion technology, and an advanced device is used for superposing optical films so as to realize the difference of high refractive index and low refractive index of the material. The colorful film achieved by the high-low refraction difference has a soft colorful and changeable effect, but the colorful reflection effect is weak, and hundreds of layers are needed for production, so that the process is complex, the equipment investment is high, the efficiency is low, and the cost is high. In addition, a multilayer magnetron coating process introduced in Taiwan of China is provided, which comprises the steps of sputtering various metals or oxides thereof on a substrate in vacuum, and realizing that the substrate presents different colors and hues when observed at different angles by utilizing the physical actions of interference, reflection, refraction and the like of each metal layer on light, thereby achieving the colorful characteristic that the color of the substrate gradually changes along with the change of the observation angle. Due to the complex production process, higher equipment and raw material cost, the market application prospect of the product can only be positioned at a high-end product.

Disclosure of Invention

The invention aims to provide a preparation method and application of a film material with a spectrum selective reflection colorful coating, which can meet colorful effects of various colors, and the colorful film in a colorful material single sheet is single-layer coating, can directly replace the traditional coating process, can achieve the effect of dozens of layers of traditional coating by only coating a macromolecule layer on a base material, reduces equipment investment, has simple process and greatly improves yield, has higher reflectivity and mechanical strength, is nontoxic and harmless, and is suitable for popularization and application.

In order to achieve the purpose, the invention provides the following technical scheme: the preparation method of the film material with the spectrum selective reflection colorful coating comprises the following steps: selectively coating a colorful reflective coating on a corona surface of a high-light-transmission optical-grade transparent PET film through MG coating spectrum, wherein the coating thickness is 0.3-0.5 mu m, and the coated surface passes through a conveying device and is evaporated by an oven with excessive solvent, wherein the oven temperature is 80-100 ℃; and (3) baking for 30-60S, and fixing the pitch gradient of the coated surface by a UV (ultraviolet) curing machine through a conveying device to obtain the colorful coating film material with the spectrum selective reflection.

Preferably, the UV radiation amount in the UV curing machine is 200-400 mj/cm.

Preferably, the spectrally selective glare reflection coating comprises the following raw materials in percentage by mass: 5-30% of polyester polymerizable monomer; 5-30% of biphenyl polymerizable monomer; 5-10% of double-bond chiral molecules; 70-80% of a solvent; 1-5% of a photoinitiator; 1-5% of a leveling agent.

Preferably, the spectrally selective glare reflection coating comprises the following raw materials in percentage by mass: 10% of polyester polymerizable monomer; 10% of biphenyl polymerizable monomers; 5% of double-bond chiral molecules; 70% of a solvent; 3% of a photoinitiator; and 2% of leveling agent.

Preferably, the preparation method of the spectrally selective glare reflective coating comprises the following steps: according to the mass percentage of the raw materials, polyester polymerizable monomers, biphenyl polymerizable monomers, double-bond chiral molecules, a solvent, a photoinitiator and a flatting agent are mixed and stirred, and then a cross-linked network polymer is formed through a polymerization reaction.

Preferably, the polyester-based polymerizable monomer has one or more polymerizable groups, and the polymerizable group is one or more of acryloyl, methacryloyl, fluoropropenyl, chloropropenyl, trifluoromethylpropenyl, and oxetanyl.

Preferably, the biphenyl polymerizable monomer has one or more polymerizable groups, and the polymerizable group is one or more of a vinyl ether group, a vinyl ketone group, a maleimide group, a phenyl maleimide group, a vinyl group, a styrene group, a diacetyl group and an epoxy group.

Preferably, the chiral moiety of the double-bond chiral molecule is one or more of chiral isoamyl alcohol, chiral secondary octanol, chiral phenyl glycol, 6-chloro-4-methyl-1-hexanol, 6-bromo-4-methyl-1-hexanol, isosorbide, anhydromannitol, and binaphthdiol.

Preferably, the solvent is one or more of ethylene glycol, glycerol, dioxane, cyclopropanone, cyclohexanone, cyclopentanone, cyclohexane, pentane, hexane, octane, ethyl acetate, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether and ethylene glycol monobutyl ether.

Preferably, the initiator is one or more of 2, 4, 6 (trimethylbenzoyl) diphenylphosphine oxide, azobisisobutyronitrile, 2-methyl-1- [ 4-methylthiophenyl ] -2-morpholino-1-propanone, 4-dimethylamino-ethyl benzoate, 1-hydroxy-cyclohexyl-monophenyl ketone, benzoin dimethyl ether, benzoin ethers, benzophenones, acetophenones, benzil ketals, benzil dimethyl ketals and bis-phenylphosphine oxides.

The film material with the spectrum selective reflection colorful coating is applied to an automobile film.

The invention has the beneficial effects that:

the preparation process is simple, and the used polymer monomer is polymerized into a cross-linked polymer network, so that the high-temperature-mechanical-stability high-weather-resistance high-temperature-resistant high-temperature-; only one layer is coated on the surface of the base material, the prepared film has high light transmittance, no toxicity and harm and wide application range, and compared with a multilayer extrusion and film coating process, the cost is greatly reduced;

secondly, the used polymer monomer has a plurality of components, so that the independent assembly of two or more molecules can be realized, the molecular density gradient difference is formed, the matching of high and low refractive indexes in the same high polymer can be realized through the cross-linking of chiral molecules, the accurate wave band reflection is achieved, and the colorful function is realized.

Drawings

FIG. 1 is a reflection spectrum of a film material with a spectrally selective reflective iridescent coating prepared in example 1 of the present invention.

Fig. 2 is a schematic structural diagram of an automotive film with a spectrally selective reflective glare coating film material prepared in example 3 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

The preparation method of the film material with the spectrum selective reflection colorful coating comprises the following steps: selecting the thickness of the high-light-transmission chemical-grade transparent PET film to be 20 micrometers on the corona surface of the high-light-transmission chemical-grade transparent PET film, coating a spectrally selective colorful reflection coating through MG, wherein the coating thickness is 0.5 micrometers, and evaporating redundant solvent on the coating surface through a transmission device and an oven, wherein the oven temperature is 100 ℃; baking time 50S, the coated surface passes through a UV curing machine fixed pitch gradient through a conveying device, wherein the radiation intensity of the UV curing machine 300mj/cm is the obtained film material with the spectrum selective reflective colorful coating.

The raw material proportions of the spectrally selective dazzling reflective coatings of examples 1 to 3 are shown in table 1:

TABLE 1

The reflection spectrogram of the film material with the spectrally selective reflective dazzling coating prepared in example 1 is shown in fig. 1.

Film materials with the spectrally selective reflective glare coatings prepared by the spectrally selective reflective coatings of examples 1-3 were tested with pure PET materials, wherein the visible light transmittance, haze, and visible light reflectance of each film material are shown in table 2.

The following methods were used to evaluate examples and comparative examples

1. The transparency test of the films, expressed in terms of Haze (Haze) and light transmission, was carried out according to GB/T2410-2008.

TABLE 2

As shown in Table 2, the transmittance of the film materials with the spectrally selective reflective colorful coatings of examples 1-3 to visible light is higher than that of the pure PET material, and the haze index of all the examples is lower than that of the pure PET material

The haze index and the colorful reflection effect of the material are obviously better than those of a pure PET material.

The film material with the spectrum selective reflection colorful coating prepared in the embodiment 3 is applied to the preparation of an automobile film, so that the automobile glass can be ensured to have better visible light vision; the antifogging effect is better; wherein the car pad pasting sets gradually from last to down to preventing fish tail hardening resin layer, high definition transparent PET film substrate, the thermal-insulated composite bed of nanometer pottery, high definition transparent PET film, spectrum selectivity coating, high acrylic resin installation glue film, high definition from type protection rete of passing through.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The preparation method of the film material with the spectrum selective reflection colorful coating is characterized in that: the preparation method comprises the following steps: selectively coating a colorful reflective coating on a corona surface of a high-light-transmission optical-grade transparent PET film through MG coating spectrum, wherein the coating thickness is 0.3-0.5 mu m, and the coated surface passes through a conveying device and is evaporated by an oven with excessive solvent, wherein the oven temperature is 80-100 ℃; baking for 30-60S, and passing the coated surface through a conveying device and a fixed pitch gradient of a UV (ultraviolet) curing machine to obtain the film material with the spectrum selective reflection colorful coating, wherein the UV radiation amount in the UV curing machine is 200-400 mj/cm.

2. The method for preparing the film material with the spectrally selective reflective flare coating of claim 1, wherein: the spectral selective dazzling reflection coating comprises the following raw materials in percentage by mass: 5-30% of polyester polymerizable monomer; 5-30% of biphenyl polymerizable monomer; 5-10% of double-bond chiral molecules; 70-80% of a solvent; 1-5% of a photoinitiator; 1-5% of a leveling agent.

3. The method for preparing the film material with the spectrally selective reflective flare coating of claim 1, wherein: the spectral selective dazzling reflection coating comprises the following raw materials in percentage by mass: 10% of polyester polymerizable monomer; 10% of biphenyl polymerizable monomers; 5% of double-bond chiral molecules; 70% of a solvent; 3% of photoinitiator and 2% of leveling agent.

4. A method for preparing a spectrally selective glare reflective coating based on claim 3, characterized in that: the preparation method comprises the following steps: according to the mass percentage raw material ratio of the spectrum selective colorful reflection coating, polyester polymerizable monomers, biphenyl polymerizable monomers, double-bond chiral molecules, a solvent, a photoinitiator and a flatting agent are mixed and stirred, and then a cross-linked network polymer is formed through a polymerization reaction.

5. The spectrally selective glare reflective coating of claim 3, wherein: the polyester polymerizable monomer has one or more polymerizable groups, and the polymerizable groups are one or more of acryloyl, methacryloyl, fluoropropenyl, chloropropenyl, trifluoromethylpropenyl and oxetanyl.

6. The spectrally selective glare reflective coating of claim 3, wherein: the biphenyl polymerizable monomer has one or more polymerizable groups, and the polymerizable groups are one or more of vinyl ether groups, vinyl methyl ketone groups, maleimide groups, phenyl maleimide groups, vinyl groups, styrene groups, diacetyl groups and epoxy groups.

7. The spectrally selective glare reflective coating of claim 3, wherein: the chiral basic element of the double-bond chiral molecule is one or more of chiral isoamyl alcohol, chiral secondary octanol, chiral phenyl ethylene glycol, 6-chlorine-4-methyl-1-hexanol, 6-bromine-4-methyl-1-hexanol, isosorbide, dehydrated mannitol and binaphthol.

8. The spectrally selective glare reflective coating of claim 3, wherein: the solvent is one or more of ethylene glycol, glycerol, dioxane, cyclopropanone, cyclohexanone, cyclopentanone, cyclohexane, pentane, hexane, octane, ethyl acetate, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether and ethylene glycol monobutyl ether.

9. The spectrally selective glare reflective coating of claim 3, wherein: the initiator is one or more of 2, 4, 6 (trimethylbenzoyl) diphenylphosphine oxide, azodiisobutyronitrile, 2-methyl-1- [ 4-methylthiophenyl ] -2-morpholino-1-acetone, 4-dimethylamino-ethyl benzoate, 1-hydroxy-cyclohexyl-phenyl ketone, benzoin dimethyl ether, benzoin ethers, benzophenones, acetophenones, benzil ketals, benzil dimethyl ketals and bis-phenylphosphine oxide.

10. Use of a film material with a spectrally selective reflective glare coating according to any one of claims 1 to 9, characterized in that: the film material with the spectrum selective reflection colorful coating is applied to an automobile film.