Nylon 66 composition for petroleum sucker rod centralizer material

Abstract

The invention relates to the polyamide composition field, particularly to a nylon 66 composition for a petroleum sucker rod centralizer material, the material is mainly used for producing injection-molding petroleum sucker rod centralizers. The material is prepared by the following raw materials(by weight proportion): 30-60% of nylon 66 slices, 5-15% of nylon 6 slices, 5-15% of compatibilzer, 0.1-0.7% of anti-oxidant, 0.5-1.5% of lubricating agent, 20-35% of fiber glass,0.1-0.5% of color master batch, and 0.1-0.7% of inorganic mineral. The preparation method is as follows: 1. weighing the above raw materials; 2. besides the glass fiber, adding materials into a high-mix machine for mixing; 3. adding the mixed raw materials into the glass fiber, and put putting the mixture into a twin screw extruder for extruding granulation. The beneficial effects of the invention are that: the product of the invention can continuously maintain the characteristics of high efficient lubrication, wear resistance and high temperature oxidation resistance at high temperature of 184 DEG C, thereby greatly improving thermal stability.

Description

technical field [0001] The invention relates to the field of polyamide compositions, in particular to a nylon 66 composition of a petroleum sucker rod centralizer material, and the material is mainly used for producing injection-molded petroleum sucker rod centralizers. 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 devel...

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.