A high glow wire polyoxymethylene composition and its preparation method and application

Abstract

The invention discloses a high-glow wire polyoxymethylene composition, which comprises the following components in parts by weight: 40-60 parts of POM resin, 40-55 parts of flame retardant masterbatch, 0.5-2 parts of lubricant, main antioxidant 0.1 to 0.5 parts of anti-oxidant and 0.1 to 0.3 parts of secondary antioxidant; the flame retardant masterbatch includes the following components in percentage by weight: thermoplastic polyurethane elastomer 21% to 32%, ammonium polyphosphate 50% to 70% and 9%-18% of melamine cyanurate, and the Shore A hardness of the thermoplastic polyurethane elastomer is 75-95A. In the present invention, TPU with a Shore A hardness of 75-95A is used to coat APP and MCA to form a flame retardant masterbatch, and then the flame retardant masterbatch and POM are co-extruded, which effectively reduces the impact of the flame retardant on POM. The degradation effect of POM material with good mechanical properties and high glow wire flammability index at the same time is obtained. This POM material is suitable for low-voltage electrical products that require high glow wire and high mechanical properties, such as: double-ended connecting pins, installation cards .

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a high-glow wire polyoxymethylene composition and a preparation method and application thereof. Background technique [0002] Polyoxymethylene (IUPAC named Polyoxymethylene, POM) is an engineering plastic with excellent performance, which has the hardness, strength and rigidity similar to metal, and has good self-lubricating property, good resistance Fatigue, and elastic, in addition it has good chemical resistance. At present, POM is replacing some markets traditionally occupied by metals at a lower cost than many other engineering plastics, such as replacing zinc, brass, aluminum and steel to make many parts, and has been widely used in electronics, machinery, instruments, Daily light industry, automobile, building materials, agriculture and other fields. [0003] However, POM resin has a low oxygen index (14.9%), which makes it very easy to burn and ...

AI Technical Summary

Problems solved by technology

Since POM resin is a highly crystalline polymer, it has poor compatibility with other additives, adding a large amount of flame retardants will significantly reduce the mechanical properties of the material, especially the toughness.

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