Search

CN-121975276-A - Black flame-retardant reinforced PBT material for laser welding and preparation method thereof

CN121975276ACN 121975276 ACN121975276 ACN 121975276ACN-121975276-A

Abstract

The invention relates to the technical field of laser welding, in particular to a black flame-retardant reinforced PBT material for laser welding and a preparation method thereof, wherein the black flame-retardant reinforced PBT material comprises, by mass, 34.8-49.25% of PBT resin, 5-10% of PET resin, 30% of glass fiber, 14-17% of flame retardant, 1-3% of flame-retardant synergist, 0.3-1.0% of antioxidant, 0.3-1.2% of lubricant, 0.15-3.0% of nucleating agent and 0.15-0.5% of organic black powder, and the flame retardant comprises at least one of brominated epoxy resin, brominated polystyrene and brominated polycarbonate. The black flame-retardant reinforced PBT material for laser welding and the preparation method thereof aim to solve the problem of high laser welding difficulty of the black PBT material.

Inventors

  • FANG MING
  • KANG AIQI
  • SUN XINGZHI
  • XU JINGFENG
  • LIN RUIFENG

Assignees

  • 江苏康辉新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (10)

  1. 1. The black flame-retardant reinforced PBT material for laser welding is characterized by comprising the following components in percentage by mass: 34.8-49.25% of PBT resin, 5-10% of PET resin, 30% of glass fiber, 14-17% of flame retardant, 1-3% of flame retardant synergist, 0.3-1.0% of antioxidant, 0.3-1.2% of lubricant, 0.15-3.0% of nucleating agent and 0.15-0.5% of organic black powder, wherein the flame retardant comprises at least one of brominated epoxy resin, brominated polystyrene and brominated polycarbonate.
  2. 2. The black flame retardant reinforced PBT material for laser welding according to claim 1, wherein the PBT resin has an intrinsic viscosity of 0.5 to 1.5dl/g and a density of 1.26 to 1.33g/cm 3 .
  3. 3. The black flame retardant reinforced PBT material for laser welding according to claim 1, wherein the intrinsic viscosity of the PET resin is 0.6 to 1.2dl/g and the density is 1.30 to 1.37g/cm 3 .
  4. 4. The black flame retardant reinforced PBT material for laser welding according to claim 1, wherein the glass fibers are alkali-free glass fibers having a diameter of 7-20 μm.
  5. 5. The black flame retardant reinforced PBT material for laser welding of claim 1, wherein the flame retardant synergist comprises at least one of antimony trioxide, talc, barium sulfate, calcium carbonate, mica powder, and wollastonite.
  6. 6. The black flame retardant reinforced PBT material for laser welding of claim 1, wherein the antioxidant is at least one of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 616, antioxidant 245, antioxidant 1098.
  7. 7. The black flame retardant reinforced PBT material for laser welding of claim 1, wherein the lubricant comprises at least one of maleic anhydride grafted polyethylene wax, oxidized polyethylene wax, maleic anhydride grafted polypropylene wax, sodium montanate, polyester-based lubricants, pentaerythritol stearate, and ethylene bis-stearamide.
  8. 8. The black flame retardant reinforced PBT material for laser welding of claim 1, wherein the nucleating agent comprises at least one of anhydrous sodium carbonate, sodium bicarbonate, sodium citrate, potassium citrate, sodium dihydrogen phosphate, sodium stearate, and sodium benzoate.
  9. 9. The black flame-retardant reinforced PBT material for laser welding according to claim 1, wherein the organic black toner is compounded by perylene red toner, indanthrone blue toner and isoindoline yellow toner with a mass ratio of 1 (0.6-0.8) (0.9-1.2).
  10. 10. A method of preparing a black flame retardant reinforced PBT material for laser welding according to claim 1, comprising the steps of: Mixing PBT resin, PET resin, a flame retardant synergist, organic black powder, an antioxidant, a lubricant, glass fiber and a nucleating agent according to a preset mass percentage; and (3) carrying out melt blending and uniform dispersion by adopting a double-screw extruder, and then carrying out bracing granulation and drying treatment to obtain the black flame-retardant reinforced PBT material.

Description

Black flame-retardant reinforced PBT material for laser welding and preparation method thereof Technical Field The invention relates to the technical field of laser welding, in particular to a black flame-retardant reinforced PBT material for laser welding and a preparation method thereof. Background Laser welding has been rapidly developed in recent years as an emerging welding means. Compared with the traditional vibration welding, friction welding and ultrasonic welding, the laser welding has the advantages of high production efficiency, no generation of dust, capability of performing 3D welding and the like. Polybutylene terephthalate (Polybutylene terephthalate, abbreviated as PBT) is a common engineering plastic which has good electrical insulation, good chemical stability and excellent heat resistance, is easy to process, and can be processed into products with various shapes by injection molding, extrusion, blow molding and the like. Because of these excellent properties, PBT is widely used in the fields of automobiles, mechanical equipment, electronics, and the like. The modified plastic is characterized in that on the basis of general engineering plastics, the performances of the plastic in terms of flame retardance, strength, impact resistance, toughness and the like are improved through filling, blending, reinforcing and other processes, and the flame retardant is particularly popular to improve the flame retardance through adding the flame retardant. Accordingly, the inventors provide a black flame retardant reinforced PBT material for laser welding and a method for preparing the same. Disclosure of Invention (1) Technical problem to be solved The embodiment of the invention provides a black flame-retardant reinforced PBT material for laser welding and a preparation method thereof, which solve the technical problem of high laser welding difficulty of the black PBT material. (2) Technical proposal The invention provides a black flame-retardant reinforced PBT material for laser welding, which comprises the following components in percentage by mass: 34.8-49.25% of PBT resin, 5-10% of PET resin, 30% of glass fiber, 14-17% of flame retardant, 1-3% of flame retardant synergist, 0.3-1.0% of antioxidant, 0.3-1.2% of lubricant, 0.15-3.0% of nucleating agent and 0.15-0.5% of organic black powder, wherein the flame retardant comprises at least one of brominated epoxy resin, brominated polystyrene and brominated polycarbonate. Further, the intrinsic viscosity of the PBT resin is 0.5-1.5 dl/g, and the density is 1.26-1.33 g/cm 3. Further, the PET resin has an intrinsic viscosity of 0.6-1.2 dl/g and a density of 1.30-1.37 g/cm 3. Further, the glass fiber is alkali-free glass fiber, and the diameter of the glass fiber is 7-20 mu m. Further, the flame retardant synergist comprises at least one of antimony trioxide, talcum powder, barium sulfate, calcium carbonate, mica powder and wollastonite. Further, the antioxidant is at least one of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 616, antioxidant 245 and antioxidant 1098. Further, the lubricant includes at least one of maleic anhydride grafted polyethylene wax, oxidized polyethylene wax, maleic anhydride grafted polypropylene wax, sodium montanate, polyester-based lubricant, pentaerythritol stearate, and ethylene bisstearamide. Further, the nucleating agent comprises at least one of anhydrous sodium carbonate, sodium bicarbonate, sodium citrate, potassium citrate, sodium dihydrogen phosphate, sodium stearate and sodium benzoate. Further, the organic black toner is formed by compounding perylene red toner, indanthrone blue toner and isoindoline yellow toner with the mass ratio of (0.6-0.8) to (0.9-1.2). The invention also provides a preparation method of the black flame-retardant reinforced PBT material for laser welding, which comprises the following steps: Mixing PBT resin, PET resin, a flame retardant synergist, organic black powder, an antioxidant, a lubricant, glass fiber and a nucleating agent according to a preset mass percentage; and (3) carrying out melt blending and uniform dispersion by adopting a double-screw extruder, and then carrying out bracing granulation and drying treatment to obtain the black flame-retardant reinforced PBT material. (3) Advantageous effects In conclusion, the brominated flame retardant is added into the black flame-retardant reinforced PBT material, so that the laser transmittance can be greatly reduced, and the flame retardant grade reaches the V0 grade. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art. Fi