Black glass fiber reinforced nylon 6 material for laser welding and preparing method thereof

Abstract

The invention discloses black glass fiber reinforced nylon 6 material for laser welding, comprising the following components, by weight percentage: 25 - 85% of nylon 6, 10 - 50% of glass fiber, 1 - 20% oftransparent modifier, and 0. 1 to 5% of laser-penetrating black powder; the preparing method comprises the following steps: weigh the various materials except for glass fiber according to the above composition ratio, and after high-speed mixing, melt and extrude them together with side-fed glass fiber through twin screw extruder melt extrusion; then cut them by the granulator, and keep the resulting pellets dried in an oven at 80 to 90 o C for 2 to 4 hours and finally the laser-penetrating black powder is produced by injection molding at a temperature of 200 to 280 o C; the material overcomes the shortcomings of the traditional black fiberglass reinforced nylon that the latter cannot be transmitted by laser. Besides, it has the advantages of high strength, high laser penetration and shortening of the welding period. The material is excellent in process science, convenient in production, low in cost, and has long service life and wide applicability, which makes it conducive to large quantities of industrial production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a black glass fiber reinforced nylon 6 material capable of laser welding and a preparation method thereof. Background technique [0002] Polyamide resin is commonly known as nylon (Nylon), English name Polyamide, referred to as PA, it is a general term for high polymers containing amide groups in the repeating unit of the main chain of the macromolecule, which can be obtained by ring-opening polymerization of lactam, or by binary It was obtained by polycondensation of amines and dibasic acids. It was the first resin developed by DuPont in the United States for fibers. It was industrialized in 1939. In the 1950s, it began to develop and produce injection molding products to replace metals to meet the requirements of lightweight, downstream industrial products. cost reduction requirements. PA has good comprehensive properties, including mechanical properties, heat resi...

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Problems solved by technology

[0004] However, the traditional black glass fiber reinforced nylon has disadvantages such as no laser permeability, low material strength, long welding cycle, and low strength of connection with thick-walled parts. Therefore, it is necessary to develop a high-strength black glass fiber reinforced nylon for laser welding. Nylon 6 material

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