A kind of preparation method and application of ultra-high molecular weight polyethylene welding wire

Abstract

The invention discloses a preparation method and application of ultra-high molecular weight polyethylene welding wire. The preparation method includes the following processes: (1) Modification of ultra-high molecular weight polyethylene: after blending ultra-high molecular weight polyethylene with a modifier, Melt and make granular modified ultra-high molecular weight polyethylene raw materials; (2) Preparation of ultra-high molecular weight polyethylene welding wire: melt and extrude the modified ultra-high molecular weight polyethylene pellets through an extruder to form a melt , The melt is extruded through a monofilament forming die to form a monofilament, and the monofilament is drawn and stretched by a three-roll tractor, and then wound by a winding machine to obtain an ultra-high molecular weight polyethylene welding wire. The welding wire prepared by the invention can be used for welding the ultra-high molecular weight polyethylene composite film, can realize the smooth connection of the seam of the ultra-high molecular weight polyethylene composite film, and the strength can reach the strength of the composite film of the body, the process is simple, the cost is low, and the operation is convenient. The welding effect is good.

Description

technical field [0001] The invention relates to the technical field of ultra-high molecular weight polyethylene materials, in particular to a preparation method and application of ultra-high molecular weight polyethylene welding wire. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) film has excellent wear resistance and impact resistance, and the impact resistance at low temperature is also excellent; the friction coefficient is small, non-polar, low surface energy, good dirt resistance and anti-icing performance; And its excellent chemical stability makes it widely used in various fields. [0003] However, in some refined applications, due to the conformal requirement of the substrate, a large number of film-to-membrane seams will inevitably be produced. These seams often become the starting point of dirt adhesion and film damage, which seriously restricts the ultra-high molecular weight. Application with vinyl film. Due to the poor melting...

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Problems solved by technology

[0003] However, in some refined applications, due to the conformal requirement of the substrate, a large number of film-to-membrane seams will inevitably be produced. These seams often become the starting point of dirt adhesion and film damage, which seriously restricts the ultra-high molecular weight. Application with vinyl film

Due to the poor melting fluidity of the UHMWPE body material, it is difficult for the materials at both ends of the weld to achieve a smooth connection without an interface in the molten state during the fusion welding process, and the weld will be correspondingly depressed. Although the welding wire can be smoothly depressed, due to melting The limitation of fluidity makes it difficult to achieve melting and mixing at the contact point between the welding wire and the materials at both ends, resulting in insufficient weld strength, which becomes the starting point of failure in the subsequent application process

[0004] At present, there is no welding process that can deal with the seam problem well, and most of them are sealed with sealant

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