CN219586030U

CN219586030U - Multilayer film capable of laser marking

Info

Publication number: CN219586030U
Application number: CN202223545762.9U
Authority: CN
Inventors: 刘朋飞; 岳绍杰; 申立全; 马尧臣
Original assignee: Guangyi Technology Wuxi Co ltd
Current assignee: Guangyi Technology Wuxi Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-08-25
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a multilayer film capable of being marked by laser, which comprises a nano weather-resistant layer, a colored nano coating, an ultraviolet absorption layer and a high polymer base film which are sequentially arranged from top to bottom, wherein the ultraviolet absorption layer mixture is coated on the high polymer base film, the colored nano layer mixture is coated on the ultraviolet absorption layer, and the nano weather-resistant layer mixture is coated on the colored nano layer. The utility model ensures the characteristic properties of each layer of the nano weather-resistant layer, the colored nano coating and the ultraviolet absorbing layer, improves the overall performance of the three-layer combination, and ensures the UV, electron beam or LED radiation curing, thereby having high curing speed, high curing degree, high wear resistance, hardness and high weather resistance.

Description

Multilayer film capable of laser marking

Technical Field

The utility model relates to the technical field of marks and labels capable of being marked by laser, in particular to a multilayer film capable of being marked by laser.

Background

Products that enter the market are often accompanied by identifiers, typically in the form of labels or tags, that provide a number of information about the product, such as manufacturer, brand, image, bar code, performance parameters, etc., that facilitate subsequent proper use and full play of the product. The common materials of the label are metal and nonmetal, and surface printing is required, so that the problems of thick and heavy color batch production difficulty and color quality damage after long-term use are presented in actual use; the sticker label is light and thin, and can meet the mass production of different colors, but has the defects of poor metal texture and low quality feeling.

The laser marking is to use high-energy laser to irradiate the material in areas to remove the surface layer material, so as to realize the contrast between the irradiated area and the non-irradiated area and further leave a permanent mark. The laser marking processing speed is high, the pattern contrast is strong, and the method is a high-speed and high-quality marker preparation technology.

CN104870591B discloses a layered material comprising a polyester resin, comprising a polymer layer comprising the reaction product of a precursor mixture and an adhesive layer, which layered material can be advantageously identified by irradiation, preferably laser irradiation; CN111107988B discloses a high temperature resistant laser markable film comprising a contrast layer based on a cured acrylate coating composition and an engraving layer arranged above the contrast layer; CN114174039a discloses a laser markable label and tag comprising a polyester film comprising a polyester resin, a photo-thermal conversion agent, a laser markable polymer and titanium dioxide.

The current laser marking film material is generally used in the fields of machines, electric and electronic equipment and automobile industry, has conventional chemical resistance, solvent resistance, temperature resistance and the like, and can meet the use requirements of non-outdoor scenes. The properties such as high weather resistance and high wear resistance which are extremely focused in outdoor application are not systematically studied in the published materials, and under the background, a laser marking film material which can meet long-term outdoor use needs to be developed.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a laser marking film material capable of meeting long-term outdoor use, and provides a laser marking multilayer film which comprises a nano weather-resistant layer, a colored nano coating, an ultraviolet absorbing layer and a high polymer base film which are sequentially arranged from top to bottom, wherein the ultraviolet absorbing layer is coated on the high polymer base film, the colored nano layer is coated on the ultraviolet absorbing layer, and the nano weather-resistant layer is coated on the colored nano layer.

Preferably, the polymer-based film is one of polyethylene terephthalate, polyurethane, polymethyl methacrylate, polyethylene, polypropylene, polyamide, polyimide, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyvinyl alcohol, cellulose, polyvinylidene chloride.

Preferably, the absorber in the ultraviolet absorbing layer is one of phenyl o-hydroxybenzoate, 2- (2 ' -hydroxy-5 ' -methylphenyl) benzotriazole, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2- (2 ' -hydroxy-3 ',5' -di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, 2' -thiobis (4-tert-octylphenoloxy) nickel, tris (1, 2, 6-pentamethylpiperidyl) phosphite, 4-benzoyloxy-2, 6-tetramethylpiperidine, 2,4, 6-tris (2 ' -n-butoxyphenyl) -1,3, 5-triazine, hexamethylphosphoric triamide.

Preferably, the thickness of the nano weather-resistant layer is 1-5 mu m.

Preferably, the thickness of the colored nano-coating is 1-12 μm.

Preferably, the ultraviolet absorbing layer has a thickness of 1 to 3 μm.

Preferably, the polymer base film has a thickness of 60 to 100. Mu.m.

The outermost layer of the utility model is a nano weather-resistant layer, and by adding the metal nano oxide and the weather-resistant auxiliary agent, the utility model provides high-efficiency weather-resistant protection and has the advantages of excellent wear resistance and hardness; the middle layer is a colored nano coating, and excellent wear resistance and hardness are provided by adding metal oxide and pigment, and the requirements of contrast of patterns and base material colors during laser marking are met; the lowest layer is an ultraviolet absorbing layer which can be tightly combined with the base material and can absorb ultraviolet rays to play a role of protecting the base film; the nanometer weather-resistant layer, the colored nanometer coating and the ultraviolet absorbing layer are independent, can be adhered and combined tightly, and ensure full play of the characteristic properties of each layer and integral improvement of the combined properties. The utility model adopts three layers to be coated and cured respectively, adopts UV, electron beam or LED radiation to cure, has high production speed and high curing degree, ensures the efficiency and simultaneously further ensures the high wear resistance, the hardness and the high weather resistance of the product.

Drawings

FIG. 1 is a schematic structural view of a laser markable multilayer film;

FIG. 2 is a flow chart of a method of making a laser markable multilayer film.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

This embodiment provides a laser markable multilayer film, as shown in fig. 1, comprising: the utility model provides a but multilayer film of laser marking, includes from top to bottom in proper order nanometer weather resistant layer 1, colored nano-coating 2, ultraviolet absorbing layer 3, polymer base film 4, wherein, ultraviolet absorbing layer 3 coats on polymer base film 4, colored nano-layer coats on ultraviolet absorbing layer 3, nanometer weather resistant layer 1 coats on colored nano-layer.

Preferably, the polymer-based film 4 is one of polyethylene terephthalate, polyurethane, polymethyl methacrylate, polyethylene, polypropylene, polyamide, polyimide, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyvinyl alcohol, cellulose, and polyvinylidene chloride.

Preferably, the absorber in the ultraviolet absorbing layer 3 is one of phenyl o-hydroxybenzoate, 2- (2 ' -hydroxy-5 ' -methylphenyl) benzotriazole, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2- (2 ' -hydroxy-3 ',5' -di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, 2' -thiobis (4-tert-octylphenoloxy) nickel, tris (1, 2, 6-pentamethylpiperidinyl) phosphite, 4-benzoyloxy-2, 6-tetramethylpiperidine, 2,4, 6-tris (2 ' -n-butoxyphenyl) -1,3, 5-triazine, hexamethylphosphoric triamide.

Preferably, the thickness of the nano weather-resistant layer 1 is 1-5 μm.

Preferably, the thickness of the colored nano-coating 2 is 1-12 μm.

Preferably, the ultraviolet absorbing layer 3 has a thickness of 1 to 3 μm.

Preferably, the polymer-based film 4 has a thickness of 60 to 100. Mu.m.

The steps of the laser markable multilayer film described above are shown in fig. 2:

s100, adding 60% of polyurethane acrylate resin and 33% of acrylate monomer into a stirring container, and heating and stirring uniformly; adding 3% of ultraviolet absorbent 2, 4-dihydroxybenzophenone and 3% of 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, and continuing to keep the temperature and stirring uniformly; finally, 0.2 percent of defoaming agent, 0.5 percent of leveling agent and 0.3 percent of base material wetting agent are added, the mixture is uniformly stirred after heat preservation, and the temperature is reduced to obtain an ultraviolet absorbing layer 3; coating an ultraviolet absorbing layer 3 on a polyethylene terephthalate base film by using a light roller, and performing low-energy irradiation pre-curing by using 90kV and 30kGy electron beams to obtain the ultraviolet absorbing layer 3;

s200, adding 30% of polyurethane acrylate resin, 20% of polyester acrylate resin and 30% of acrylate monomer into a stirring container, and heating and stirring uniformly; adding 8% of carbon black, 4% of nano zinc oxide, 6% of nano aluminum oxide and 1% of dispersing agent, and uniformly stirring under heat preservation; adding 0.5% of defoaming agent and 0.5% of leveling agent, preserving heat, stirring uniformly, and cooling to obtain a colored nano layer; coating a colored nano layer on the ultraviolet absorbing layer 3 by using a slit, and performing low-energy irradiation pre-curing by using 100kV and 40kGy electron beams to obtain the colored nano layer;

s300, adding 40% of polyurethane acrylic resin, 20% of acrylic resin and 25% of acrylic monomer into a stirring container, and heating and stirring uniformly; adding 1% of nano titanium oxide, 3% of nano aluminum oxide, 1% of dispersing agent, 3% of 2, 6-di-tert-butylphenol, 4% of triphenyl phosphite and 2- (2 ' -hydroxy-3 ',5' -di-tert-phenyl) -5-chloridized benzotriazole, and uniformly stirring under heat preservation; adding 0.4% of defoaming agent and 0.6% of leveling agent, preserving heat, stirring uniformly, and cooling to obtain a nano weather-resistant layer 1; coating the nano weather-resistant layer 1 on the colored nano layer by using a net roller, and carrying out high-energy irradiation by using 130kV and 120kGy electron beams to obtain the nano weather-resistant layer 1, and simultaneously preparing the multi-layer film capable of laser marking.

In this embodiment, the coating may be performed by one or more combinations of smooth roll coating, web roll coating, blade coating, metering bar coating, spray coating, curtain coating, and slit coating.

Example 2

Another process for preparing the laser markable multilayer film described above is as follows:

s100, adding 50% of polyurethane acrylate resin and 40% of acrylate monomer into a stirring container, and heating and stirring uniformly; adding 3% of 2-hydroxy-4-n-octoxybenzophenone and 4% of resorcinol monobenzoate, and continuously preserving heat and stirring uniformly; finally, 0.1 percent of defoaming agent, 0.4 percent of flatting agent, 0.5 percent of base material wetting agent and 2 percent of photoinitiator are added, the mixture is uniformly stirred in a heat preservation way, and the temperature is reduced to obtain an ultraviolet absorbing layer 3; the ultraviolet absorbing layer 3 was coated on a polyethylene terephthalate/polyurethane blend base film by a web roll at 300mj/cm ² Low-energy irradiation pre-curing is carried out on UV to obtain an ultraviolet absorption layer 3;

s200, adding 20% of polyurethane acrylate resin, 25% of polyester acrylate resin and 32% of acrylate monomer into a stirring container, and heating and stirring uniformly; adding 10% of silver powder, 6% of nano aluminum oxide, 2% of nano titanium oxide and 1.2% of dispersing agent, and uniformly stirring under heat preservation; 0.4 percent of defoaming agent is added,0.4% of flatting agent and 3% of photoinitiator, and carrying out heat preservation and uniform stirring, and cooling to obtain a colored nano layer; coating the colored nano layer on the ultraviolet absorbing layer 3 by using a scraper, and passing through the ultraviolet absorbing layer at a speed of 500mj/cm ² UV performs low-energy irradiation pre-curing to obtain a colored nano layer;

s300, adding 35% of polyurethane acrylate resin, 18% of acrylate resin and 28% of acrylate monomer into a stirring container, and heating and stirring uniformly; adding 1% of nano titanium oxide, 4% of nano zirconium oxide, 1% of dispersing agent, 4% of 2-hydroxy-4-n-octoxybenzodone, 3% of tris (2, 4-di-tert-butylphenyl) phosphite, 1.5% of 2-hydroxy-4-n-octoxybenzophenone and 1.5% of 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, and uniformly stirring under heat preservation; adding 0.5% of defoaming agent, 0.5% of flatting agent and 2% of photoinitiator, preserving heat, stirring uniformly, and cooling to obtain a nano weather-resistant layer 1; coating the nano weather-resistant layer 1 on the colored nano layer by using a net roller, and passing through the surface of 1500mj/cm ² And (3) performing high-energy irradiation and full curing by UV to obtain the nano weather-resistant layer 1, and simultaneously preparing the multilayer film capable of being marked by laser.

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

Claims

1. The multilayer film capable of being marked by laser is characterized by comprising a nanometer weather-resistant layer, a colored nanometer coating, an ultraviolet absorption layer and a high polymer base film which are sequentially arranged from top to bottom, wherein the ultraviolet absorption layer is coated on the high polymer base film, the colored nanometer coating is coated on the ultraviolet absorption layer, and the nanometer weather-resistant layer is coated on the colored nanometer coating.

2. The laser markable multilayer film according to claim 1 wherein the polymer based film is one of polyethylene terephthalate, polyurethane, polymethyl methacrylate, polyethylene, polypropylene, polyamide, polyimide, polyvinyl chloride, polytetrafluoroethylene, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer, polyvinyl alcohol, cellulose, polyvinylidene chloride.

3. The laser markable multilayer film according to claim 1 or 2 wherein the absorber in the uv absorbing layer is one of phenyl o-hydroxybenzoate, 2- (2 ' -hydroxy-5 ' -methylphenyl) benzotriazole, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2- (2 ' -hydroxy-3 ',5' -di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, 2' -thiobis (4-tert-octylphenoloxy) nickel, tris (1, 2, 6-pentamethylpiperidyl) phosphite, 4-benzoyloxy-2, 6-tetramethylpiperidine, 2,4, 6-tris (2 ' n-butoxyphenyl) -1,3, 5-triazine, hexamethylphosphoric triamide.

4. The laser markable multilayer film according to claim 1 or 2 wherein the nano-weatherable layer has a thickness of 1 to 5 μm.

5. The laser markable multilayer film according to claim 1 or 2 wherein the colored nanocoating layer has a thickness of 1 to 12 μm.

6. The laser markable multilayer film according to claim 1 or 2 wherein the uv absorbing layer has a thickness of 1 to 3 μm.

7. The laser markable multilayer film according to claim 1 or 2 wherein the polymeric base film thickness is 60 to 100 μm.