Modified plastic for laser welding and preparation method thereof
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A laser welding and modification technology, applied in the field of materials, can solve the problems of high mobility, low laser transmittance, strong toxicity, etc., and achieve the effects of low mobility, high laser transmittance, and good weather resistance.
Active Publication Date: 2018-02-02
YANFENG PLASTIC OMNIUM AUTOMOTIVE EXTERIOR SYST
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[0006] The purpose of the present invention is to provide a modified plastic that can be used for laser welding and its preparation method, so as to solve the problems that the modified materials in the prior art have either low laser transmittance, strong toxicity, and high mobility
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Embodiment 1
[0034] With 84kg polypropylene H9018, 15kg ethylene-octene copolymer 8137, 0.2kg perylene-based black toner L480, 0.3kg antioxidant 1010, 0.2kg lubricant (stearic acid), 0.3kg weather resistance additive, in the long Melt, mix and disperse in a twin-screw extruder with a diameter ratio of 40:1, extrude at a temperature of 200°C, extrude and granulate, and finally obtain the product.
Embodiment 2
[0036] 54kg polypropylene K9017, 27kg polypropylene BX3900, 18kg ethylene-butene copolymer 7467, 0.2kg perylene-based black toner L480, 0.3kg antioxidant 1010, 0.2kg lubricant (stearic acid), 0.3kg weather resistance The auxiliary agent is melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and the extrusion temperature is 200° C., extruded and granulated, and finally the product is obtained.
[0037] Example 2 On the basis of Example 1, a single type of polypropylene is replaced by two types of polypropylene mixtures, these two types of polypropylene are respectively homopolymerized and copolymerized with different melt fingers, and the two components The combination ensures that the substrate has higher laser transparency than that of Example 1 on the basis that the material has a certain processing type and mechanical properties. After adding the same content of perylene-based black toner, its laser transparency Transient still has ...
Embodiment 3
[0039] 50kg polypropylene K9017, 30kg polypropylene BX3900, 19kg ethylene-butene copolymer 7467, 0.05kg perylene-based black toner L480, 0.3kg antioxidant 1010, 0.3kg lubricant (stearic acid), 0.35kg weather resistance The auxiliary agent is melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and the extrusion temperature is 200° C., extruded and granulated, and finally the product is obtained.
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Abstract
The invention provides modified plastic for laser welding. The modified plastic is prepared in the way that a perylene-series black toner is added into a base material through which laser can penetrate, the perylene-series black toner accounts for 0.05-5% of the modified plastic according to mass percent, and laser can penetrate the modified plastic at 800-1,100 nm. The invention further providesa preparation method of the modified plastic for laser welding. The invention provides the modified plastic, which is high in laser transmittivity, easy to dye, low in mobility and good in weather fastness and can meet the requirements on performance and appearance in case of long-time exposure, and application of the laser welding technology to the field of automobile interior and exterior trimming is greatly expanded.
Description
technical field [0001] The invention relates to the field of materials, in particular to a modified plastic capable of laser welding and a preparation method thereof. Background technique [0002] Laser welding is a technology that uses the heat generated by a laser beam to melt plastic contact surfaces, thereby bonding thermoplastic sheets, films or molded parts together. The most commonly used form of laser welding is called transmission laser welding. [0003] The process of laser transmission welding technology is: first clamp two plastic parts to be welded together, and then direct a beam of laser light in the short-wave infrared region to the part to be bonded, the laser beam passes through the upper material, and then is absorbed by the lower material, The laser energy is absorbed to raise the temperature of the underlying material, melting the upper layer and the plastic of the lower layer, thus completing the welding. Wherein, the upper material can be transparent...
Claims
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