Anti-static flame-retardant plastic for roller of underground conveying belt of coal mine

Abstract

The invention relates to the field of polyamide composite, in particular to anti-static flame-retardant plastic for a roller of an underground conveying belt of a coal mine. The plastic is prepared from the following raw materials in percentage by mass: 30 to 60 percent of nylon 66 slice, 25 to 40 percent of glass fiber, 5 to 20 percent of compatilizer, 5 to 20 percent of red phosphorus flame retardant, 0.5 to 2 percent of antistatic agent, 0.5 to 1.5 percent of lubricant, and 0.2 to 1.0 percent of antioxidant. The preparation method comprises the following steps: 1, weighing the raw materials; 2, putting raw materials except the glass fiber into a high mixing machine for mixing; and 3, adding the glass fiber into the mixed raw materials, a double-screw extruder for extruding and granulating. The plastic has the beneficial effects of well overcoming the defects of static resistance and flame retardancy in the prior art, and poor use effect, ensuring that the product has good flame retardant effect and is antistatic, and having small influence on other physical indexes of the product.

Description

technical field [0001] The invention relates to the field of polyamide compositions, in particular to an antistatic and flame-resistant plastic for a coal mine underground conveyor belt roller. Background technique [0002] Polyamide is commonly known as nylon (Nylon), and its English name is Polyamide (referred to as PA). It is a general term for thermoplastic resins containing repeated amide groups - [NHCO] - in the main molecular chain. Including aliphatic PA, aliphatic-aromatic PA and aromatic PA. Among them, aliphatic PA has many varieties, large output, and wide application. Its name depends on the specific number of carbon atoms in the synthetic monomer. [0003] Nylon is the most important engineering plastic, and its output ranks first among the five general-purpose engineering plastics. Nylon is a polyamide fiber (nylon). It can be made into long or short fibers. [0004] Nylon was developed by an outstanding scientist in the United States, Carothers, and a resea...

AI Technical Summary

Problems solved by technology

However, it also has the disadvantages of high water absorption, low heat distortion temperature and low modulus, which limit its application.

Filling modification is usually used to improve its dimensional stability and rigidity, such as filling nylon 66 with glass fiber, carbon fiber, kaolin, talc and other inorganic substances can improve the strength, modulus and heat resistance of the material, but at the same time lead to The strength of the material, especially the impact toughness, is reduced, and the specific gravity of the composite material is greatly increased due to the large amount of inorganic substances filled.

[0006] The conveyor belt rollers used in underground coal mines now use nylon 66 as the base material, which is antistatic and flame retardant, and the effect is not good when used at the same time