Foaming composite material and preparation method thereof

Abstract

The invention provides a foamed composite material and a preparation method thereof, and belongs to the technical field of 3D printing, the foamed composite material specifically comprises, by weight, 80-100 parts of a polymer matrix, 1-10 parts of a foaming functional master batch and 1-10 parts of a processing aid, the foaming functional master batch at least comprises a low-melting-point carrier, expandable microspheres, a foaming agent and a functional aid, and the processing aid is a polymer matrix. The particle size distribution of the expandable microspheres is 10-50 [mu] m, the initial foaming temperature is 120-145 DEG C, the foaming peak temperature is 190-200 DEG C, the true density is 1000-1300 kg/m < 3 >, and the processing aid is at least one of an antioxidant, a lubricant, a flexibilizer, a compatilizer and a heat stabilizer. According to the treatment scheme, by using the foaming functional master batch, the prepared foaming composite material product is small in specific gravity, high in specific strength, uniform in internal foam hole, low in shrinkage rate, free of warping and low in cost.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a foamed composite material and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing, is based on three-dimensional mathematical model data, through continuous physical superposition, adding materials layer by layer, and finally obtaining three-dimensional material products. Commonly used 3D printing polymer materials mainly include thermoplastic resins and photosensitive resins, such as PLA and ABS. 3D printed polymer products have problems such as large shrinkage, warping, and obvious decline in mechanical properties. Although it is possible to add nucleating agents, tougheners, and expandable microspheres to the material components to change the crystal form of the material and introduce a cell structure to achieve the purpose of reducing the material density and improving the toughness of the material, but more P...

AI Technical Summary

Problems solved by technology

3D printed polymer products have problems such as large shrinkage, warpage, and obvious decline in mechanical properties.

Although it is possible to add nucleating agents, tougheners, and expandable microspheres to the material components to change the crystal form of the material and introduce a cell structure to achieve the purpose of reducing the material density and improving the toughness of the material, but more Processing aids, it is difficult to achieve comprehensive control of material mechanical properties and lightweight in a short processing cycle

Moreover, although it is possible to obtain material products with relatively uniform cells by introducing microcellular foaming technology, how to realize the control of the processing parameters of the foaming agent microspheres, the compound foaming agent, and the material matrix in the process of processing to obtain the most Excellent microcellular foaming polymer, there are big challenges

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