Preparation and application method of electret material for biodegradable plastic

Abstract

The invention discloses preparation of an electret material for biodegradable plastic. Carbon nitride and inorganic acid are used as raw materials. The process for preparing the electret material comprises the following steps of A, preparing a carbon nitride material; B, preparing an inorganic acid aqueous solution, stirring and mixing the inorganic acid aqueous solution and the carbon nitride material uniformly, transferring a mixture into a drying oven, preserving heat, and cooling to room temperature; and C, filtering a carbon nitride material reaction liquid, performing washing with water for multiple times, and performing drying to obtain the surface-modified carbon nitride electret material. The application method of the electret material for the biodegradable plastic comprises the following steps of A, preparing surface-acidified carbon nitride electret master batch; and B, mixing the electret master batch and the biodegradable plastic in proportion to generate melt-blown cloth. According to the invention, the electret material is prevented from being separated out from the biodegradable plastic during melt-blowing, the cost is low, the electret material can effectively store electrostatic charge and prolong the retention time of the charge in the melt-blown cloth, a relatively high electret effect can be achieved with a small amount of the electret material, and the filtering efficiency can be effectively improved by terminal application.

Description

technical field [0001] The invention relates to the technical field of preparation and application methods of raw materials for the production of melt blown cloth, in particular to a preparation and application method of an electret material used in biodegradable plastics. Background technique [0002] The non-woven fiber cloth produced by the melt-blown method is made of polymer slices such as degradable resins (including biodegradable plastics) with a high melt flow rate, which are first heated by an extruder to form a flowing polymer high-temperature melt, and then melted The melt is ejected from the spinneret hole of the extruder to form a thin spinning stream, and the high-speed hot air flow on both sides of the extruder clamps the high-temperature melt stream, and then it is drawn and stretched to form an ultra-fine fiber shape, and then in the The matching receiving device gathers into a network structure, and uses the waste heat of the melt that has not been complete...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing organic electret materials used in the production of non-woven fabrics due to the defects in materials and preparation processes, and the fact that inorganic electret materials will increase the inspection cost of the enterprise and lead to unstable product quality, the present invention provides a powder-based Carbon nitride materials and inorganic acids are used as raw materials to prepare organic electret materials, which can be firmly combined with biodegradable plastic reactivity when producing non-woven fabrics, effectively inhibiting the weak combination of electret materials and resins (biodegradable plastics). And lead to the phenomenon of electret material precipitation, and can effectively store electrostatic charge, prolong the charge retention time in the meltblown cloth, and achieve a high electret effect with a small amount, reducing the air resistance of the same gram weight of non-woven products, Preparation and application method of electret material used in biodegradable plastics capable of achieving higher filtration efficiency

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