Polyamide material with excellent appearance, low water absorption and self-tapping slipping resistance, preparation method and application thereof

Abstract

The invention discloses a polyamide material with excellent appearance, low water absorption and self-tapping slipping resistance, a preparation method and application of the polyamide material to preparation of an electric kettle temperature controller. The polyamide material is prepared from the following raw materials by weight percentage: 25-35% of PA66, 0-15% of PA6, 30-40% of a reinforcing component, 5-15% of microencapsulated red phosphorus flame-retardant master batch, 3-8% of a compatilizer, 0.2-2% of a self-tapping slipping resistant aid and 3-8% of other aids; wherein the compatilizer is at least one of polypropylene grafted maleic anhydride and polyethylene grafted maleic anhydride, and the melt index of the compatilizer is 35-150g/10min under the conditions of 190DEG C and 1.2kg; and the self-tapping slipping resistant aid is prepared from calcium aryl sulfonate and nano zirconium oxide. The preparation method comprises the following steps of: uniformly blending the raw material components except the reinforcing component according to a ratio to obtain a premix, adding the premix into a double-screw extruder from a feeding port, adding the reinforcing component from afirst exhaust port of the double-screw extruder, and carrying out melt extrusion, cooling, drying and pelletizing to obtain the polyamide material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyamide material with excellent appearance, low water absorption and self-tapping slip resistance, and a preparation method and application thereof. Background technique [0002] Polyamide (PA), commonly known as nylon, can be prepared by ring-opening polymerization of lactam or by polymerization of dibasic acid monomer and diamine monomer. It has excellent mechanical properties, excellent barrier properties, high heat resistance, high resistance to Excellent comprehensive properties such as abrasion resistance and high chemical corrosion resistance, are widely used in automobiles, electric tools, electronic appliances, smart home appliances and other fields. However, polyamide also has disadvantages such as the decline of mechanical and electrical properties after water absorption, and the slippage of high-torque self-tapping screws after locking, so it is necessar...

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Problems solved by technology

[0007] The above-mentioned prior art is more effective in reducing the water absorption of polyamide materials, but the specific solutions are only suitable for special application fields, such as fiber reinforced and mineral-filled nylon, which will lead to a decrease in material toughness, especially when the water absorption rate is high when the glass fiber content is high. A phenomenon that decreases but causes apparent floating fibers in the material

However, through PP or ABS alloy, although the water absorption rate can be significantly reduced, it will cause the material to be soft, the modulus will decrease significantly, and the fluidity of the material will decrease, which will affect the appearance of the material.

In addition to the water absorption rate, the current material improvement plan does not comprehensively consider the appearance of the finished product and the self-tapping slippery wire when the polyamide material is assembled and locked, and there are no case reports that meet the application requirements in the field of electric kettle thermostats.

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