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CN-122011667-A - Plastic composition and preparation method and application thereof

CN122011667ACN 122011667 ACN122011667 ACN 122011667ACN-122011667-A

Abstract

The plastic composition is characterized by comprising, by weight, 88-100 parts of polymer resin, 0.1-2 parts of compound laser marking agent, 0.02-1 part of black colorant and 0.2-1 part of organic color pigment, wherein the compound laser marking agent is selected from the compound of ultraviolet laser sensitivity agent/near infrared laser sensitivity agent/far infrared laser sensitivity agent. According to the invention, ultraviolet laser, near infrared laser and far infrared laser marking can be simultaneously realized through compounding the laser marking agent, and the composition can be induced to generate different optical effects such as pigment color and/or structural color, so that permanent marks with multiple colors (laser marks with at least 2 clock colors) are formed on a single substrate, the process is simple and efficient, the marking effect is bright, and the anti-counterfeiting performance is strong.

Inventors

  • LIU MAOCHEN
  • YUAN GANG
  • TANG LEI
  • ZHAO RUIGANG

Assignees

  • 江苏金发科技新材料有限公司
  • 上海金发科技发展有限公司

Dates

Publication Date
20260512
Application Date
20260327

Claims (10)

  1. 1. The plastic composition is characterized by comprising the following components in parts by weight: 88-100 parts of polymer resin; 0.1-2 parts of compound laser marking agent; 0.02-1 parts of black colorant; 0.2-1 part of organic color pigment; the compound laser marking agent is selected from the compound of ultraviolet laser sensitivity agent/near infrared laser sensitivity agent/far infrared laser sensitivity agent, and the compound weight ratio is (0.19-1.21) to 1.
  2. 2. The plastic composition of claim 1, wherein the polymer resin is selected from at least one of polypropylene, polyethylene, polyvinyl chloride, polystyrene, polycarbonate, polyoxymethylene, polybutylene terephthalate, polyamide, acrylonitrile-butadiene-styrene terpolymer, or polymethyl methacrylate.
  3. 3. The plastic composition of claim 1, wherein the ultraviolet laser sensitizer is at least one selected from zinc sulfide, zinc oxide, tin oxide, cerium oxide, cadmium sulfide, cadmium selenide, ammonium molybdate, ammonium metavanadate, preferably at least one selected from zinc sulfide, zinc oxide, ammonium molybdate, more preferably ammonium molybdate, the near infrared laser sensitizer is at least one selected from copper hydroxyphosphate, ferroferric oxide, bismuth oxide, tin antimony oxide, indium doped tin oxide, lanthanum hexaboride, tungsten oxide, graphene oxide, carbon nanotubes, preferably at least one selected from copper hydroxyphosphate, tin antimony oxide, graphene, more preferably at least one selected from tin antimony oxide, graphene, and the far infrared laser sensitizer is at least one selected from calcium carbonate, barium sulfate, aluminum hydroxide, magnesium hydroxide, talc, kaolin, mica, preferably the far infrared laser sensitizer is at least one selected from aluminum hydroxide, magnesium hydroxide.
  4. 4. The plastic composition according to claim 1, wherein the ratio by weight of the ultraviolet laser sensor/near infrared laser sensor/far infrared laser sensor is (0.39-0.71): 1.
  5. 5. The plastic composition of claim 1, wherein the black colorant is at least one selected from the group consisting of aniline black, azo black, copper chrome black, iron chrome black, acetylene black, conductive carbon black, channel black, furnace black.
  6. 6. The plastic composition according to claim 1, wherein the organic color pigment is at least one selected from the group consisting of azo color pigments, phthalocyanine color pigments, anthraquinone color pigments, quinacridone color pigments, perylene color pigments, quinophthalone color pigments, heterocyclic color pigments, and methylene color pigments.
  7. 7. The plastic composition according to claim 1, further comprising 0 to 0.5 parts by weight of an antioxidant selected from at least one of hindered phenolic antioxidants, aminic antioxidants, phosphite antioxidants and diphenylamine antioxidants.
  8. 8. The plastic composition of claim 1, further comprising 0-30 parts by weight of a mechanical reinforcing filler, wherein the mechanical reinforcing filler is at least one selected from glass fiber, carbon Fiber (CF) and mineral filler (talcum powder and wollastonite), and further comprises 5-20 parts by weight of a halogen-free flame retardant, wherein the flame retardant is a halogen-free flame retardant.
  9. 9. The method for preparing the plastic composition according to any one of claims 1 to 8, which is characterized by comprising the following components of uniformly mixing the components according to the proportion, and extruding and granulating by a double-screw extruder to obtain the plastic composition.
  10. 10. Use of a plastic composition according to any of claims 1-8 for the preparation of laser-marked articles.

Description

Plastic composition and preparation method and application thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a plastic composition, a preparation method and application thereof. Background The laser marking technology has been widely used for marking, decorating and anti-counterfeiting of plastic products because of its advantages of permanence, high efficiency, no contact, no pollution, etc. Conventional Laser marking typically produces a single color mark on the surface of the plastic, most commonly by carbonization, foaming, or color change of a carbon dioxide Laser (10.6 μm) or Fiber Laser (1.06 μm) on the plastic containing specific additives (e.g., carbon black, metal oxides, etc.), thereby forming a black, white, or gray mark. While the color laser marking of the polymer mainly comprises a chemical modification method and a physical bonding method, wherein the physical bonding method can obtain the color marking and realize various colors, but has the advantages of complex process, uneven coloring and non-permanent marking. The chemical modification method is based on the original mark, and further development is performed on the added coloring agent or pigment, so that the surface layer of the sample piece absorbs laser energy, and the generated color is different from the original color. CN109337360B, by adding black pigment to the material, under stronger hiding power, the original color appears black, and when the composition is subjected to laser, the black pigment is discolored, leaving the color pigment, thus forming a permanent color mark on the article. However, the chemical modification method can only realize single color on the same substrate, but cannot realize multiple colors, and as the demands of the market on product appearance individuation, high-end and anti-counterfeiting increase, the laser mark with single color cannot meet the demands. Today, no related product has achieved laser marking of multiple colors on the same substrate by chemical modification. The bottleneck in the prior art is that its polychromatic effect is severely dependent on complex post-treatments or multilayer structures, rather than being achieved by precise control of a single homogeneous material. Therefore, there is an urgent need in the art for a plastic composition that is specifically designed, and that can fundamentally solve the difficulty of achieving stable, vivid, multi-color marking on a single substrate in combination with a multi-wavelength laser process. Disclosure of Invention The invention aims to overcome the technical defects and provide a plastic composition for simultaneously realizing ultraviolet laser, near infrared and far infrared laser marking, and a preparation method and application thereof. The invention is realized by the following technical scheme: The plastic composition comprises the following components in parts by weight: 88-100 parts of polymer resin; 0.1-2 parts of compound laser marking agent; 0.02-1 parts of black colorant; 0.2-1 part of organic color pigment; the compound laser marking agent is selected from the compound of ultraviolet laser sensitivity agent/near infrared laser sensitivity agent/far infrared laser sensitivity agent, and the compound weight ratio is (0.19-1.21) to 1. In the plastic composition of the present invention, the content of the polymer resin may be 88 parts, 89 parts, 90 parts, 91 parts, 92 parts, 93 parts, 94 parts, 95 parts, 96 parts, 97 parts, 98 parts, 99 parts, 100 parts or a range value therebetween, the content of the compounded laser marking agent may be 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2.0 parts or a range value therebetween, and the content of the black colorant may be 0.02 parts, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.3 parts, 0.4 parts, 0.8 parts, 0.5 parts, 0.8 parts or a range value therebetween, and the content of the black colorant may be 0.02 parts, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts or a range value therebetween. The polymer resin is at least one selected from polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polyoxymethylene (POM), polybutylene terephthalate (PBT), polyamide (PA), acrylonitrile-butadiene-styrene terpolymer (ABS) and polymethyl methacrylate (PMMA). The ultraviolet laser sensitivity agent is at least one selected from zinc sulfide, zinc oxide, tin oxide, cerium oxide, cadmium sulfide, cadmium selenide, ammonium molybdate and ammonium metavanadate. The ultraviolet laser sensitizer is at least one selected from zinc sulfide, zinc oxide and ammonium molybdate, and more preferably ammonium molybdate. The average particle size of the uv laser sensitive agent may be 10 nm to 1000nm