Laser-etched polypropylene modified material and preparation method thereof

Abstract

The invention relates to a laser-etched polypropylene modified material and a preparation method thereof. The laser-etched polypropylene modified material is prepared from the following components: 62to 92.8 percent of polypropylene, 5 to 30 percent of talcum powder, 1 to 5 percent of laser-etching master batch, 0.1 to 0.5 percent of coupling agent, 0.5 to 1 percent of lubricant, 0.5 to 1 percentof dispersant and 0.1 to 0.5 percent of antioxidant. A technology comprises the following steps: firstly, adding all component materials into a mixing barrel according to the ratio and uniformly mixing; then adding a mixture into a double-screw extruder and mixing, wherein first-section extrusion temperature and second-section extrusion temperature of the double-screw extruder are 170 to 180 DEGC, extrusion temperature of other sections is 190 to 230 DEG C and the total staying time of reactants in the double-screw extruder is 3 to 8min; finally, after extruding the obtained material, cooling and dicing to obtain the needed laser-etched polypropylene modified material. The material provided by the invention is used on new energy source automobiles at present and the work of printing, spraying paint and the like on original products is omitted; meanwhile, the environment protection problem caused by links including paint spraying and the like are solved; the material provided by the invention is adaptive to requirements on the development of the times and has a wide application prospect.

Description

Technical field [0001] The invention relates to a composite material, in particular to a laser-carved polypropylene modified material and a preparation method thereof. Background technique [0002] Laser engraving, also called laser engraving or laser marking, is a surface treatment process using optical principles. The high-intensity focused laser beam emitted by a laser is used at the focal point to oxidize the material and process it; the effect of marking is to expose the deep material through the evaporation of the surface material, or to cause the chemical and physical changes of the surface material to show traces through light energy Either part of the material is burned off by light energy, and traces are "carved", or part of the material is burned off by light energy, showing the pattern and text that need to be etched. At present, commercial laser-marked plastics include polypropylene (PP), high-density polyethylene, etc. Among them, polypropylene (PP) has good mechan...

AI Technical Summary

Problems solved by technology

However, polypropylene has a large shrinkage rate, cold resistance, dyeability, printability and poor adhesion, which limit its use in laser marking products.