Long-acting antibacterial and mildew-proof PP/PS plastic and preparation method thereof

Abstract

The invention provides long-acting antibacterial and mildew-proof PP / PS plastic and a preparation method thereof. The long-acting antibacterial and mildew-proof PP / PS plastic is prepared from following raw materials in parts by weight: 120-165 parts of PP master batch, 170-240 parts of PS master batch, 6-13 parts of an antibacterial and mildew-proof agent, 6-9 parts of microcrystalline cellulose, 2-4 parts of a plasticizer, 1-5 parts of a toughening agent, 1-5 parts of an antioxidant and 1-3 parts of an ultraviolet light absorber. The preparation method comprises the following steps: S1, adding the raw materials into a double-screw extruder according to the proportion, and mixing and extruding; and S2, conveying the materials extruded in the step S1 to a single-screw extruder, and granulating to obtain a finished product. The long-acting antibacterial and mildew-proof PP / PS plastic is prepared from the PP master batch, the PS master batch, the antibacterial and mildew-proof agent, the microcrystalline cellulose, the plasticizer, the toughening agent, the antioxidant and the ultraviolet light absorber, and the raw materials are premixed before entering a shell of the extruder, so that the mixing uniformity is improved, and the mixing time in an extrusion screw is shortened.

Description

technical field [0001] The invention relates to the technical field of plastic preparation, in particular to a long-acting antibacterial and mildew-proof PP / PS plastic and a preparation method thereof. Background technique [0002] Plastic is a high molecular compound polymerized by addition polymerization or polycondensation reaction with monomer as raw material. It has medium resistance to deformation and is between fiber and rubber. Additives such as additives and pigments; With the progress of human society, plastic products occupy an increasingly important position in daily life. At the same time, various environmental pollutions are becoming more and more serious. Bacterial pollution directly leads to the spread and spread of harmful bacteria and endangers people's health. Antibacterial plastics refer to adding antibacterial agents to plastics to make the plastic itself antibacterial, which can kill bacteria stained on the plastic within a certain period of time. Comp...

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Problems solved by technology

[0003] In the preparation process of the existing long-acting antibacterial and mildew-proof PP / PS plastics, a twin-screw extruder is needed to mix the raw materials to improve the mixing efficiency of the raw materials. However, when the existing twin-screw extruder is in use, The mixing efficiency between the raw materials is low, so it is necessary to set a longer extrusion screw to mix the raw materials evenly, and the cost is higher. In addition, when the existing twin-screw extruder is being maintained, the extruder shell and the extrusion screw Due to the high degree of cooperation between the shell and the extrusion screw, it is necessary to maintain the stability of the movement at all times during disassembly. If the site is uneven, it is easy to cause damage to the equipment, so the flatness of the ground is required. High, which is not conducive to the layout of equipment. In the case that the preparation method is relatively perfect, it is necessary for us to combine the method from the whole process of the process such as the improvement of the equipment to make improvements that are more beneficial to the entire method process.

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