A kind of high-strength nylon compound and preparation method thereof

Abstract

The invention discloses a high-strength nylon composite, which consists of nylon 6 or nylon 66 with a mass percentage of 43.1% to 74.4%, alkali-free long glass fibers with a mass percentage of 20% to 50%, and magnesium with a mass percentage of 5%. It consists of salt whiskers, 0.2% to 1% by mass of nylon chain extender, 0.1% to 0.3% by mass of antioxidant and 0.3% to 0.6% by mass of lubricant. The high-strength nylon compound of the present invention adds formulation materials: magnesium salt whisker, nylon chain extender, antioxidant and lubricant on the basis of main material being nylon 6 or nylon 66, alkali-free long glass fiber, can have greatly Increases the physical and mechanical properties of nylon compounds. The advantages of the high-strength nylon compound of the present invention are: doubled mechanical properties, significantly improved heat resistance, reduced molding shrinkage, reduced water absorption, significantly improved creep resistance and fatigue resistance.

Description

technical field [0001] The invention relates to a high-strength nylon composite and its preparation method, in particular to a high-strength nylon composite prepared by adding glass fibers into a nylon (polyamide) matrix and blending and extruding. Background technique [0002] Nylon (polyamide) has excellent mechanical properties, physical and mechanical properties, electrical properties, wear resistance and chemical resistance, such as high tensile strength, good impact resistance, outstanding chemical resistance and oil resistance, and is one of the five general engineering The most widely used variety in plastics. There are many modified nylons with glass fiber added on the market to enhance the shortcomings of nylon products such as easy warping and poor fluidity, but it is easy to cause the size of the injection products to be unstable and easy to deform, which will have a negative impact on the post-assembly of the products , seriously affecting its performance. In ...

AI Technical Summary

Problems solved by technology

There are many modified nylons with glass fiber added on the market to enhance the shortcomings of nylon products such as easy warping and poor fluidity, but it is easy to cause the size of the injection products to be unstable and easy to deform, which will have a negative impact on the post-assembly of the products , seriously affecting its performance

In terms of formula, simply using glass fiber to enhance the characteristics of nylon can easily cause nylon to warp and have poor fluidity. Even if minerals are added to improve warpage and fluidity, it will also cause a great impact on the mechanical properties. Negative impact

In terms of production technology, volumetric feeding is mainly used to feed nylon, mineral powder and other additives at the same time, and long glass fiber is used for side feeding. This kind of production technology often makes the product quality unstable.

In addition, nylon also has more prominent shortcomings, such as high water absorption rate, resulting in poor dimensional stability, etc. Nylon is used as an engineering plastic, and its mechanical properties need to be further improved in order to obtain polyamide materials with higher strength and heat distortion temperature.