A kind of antibacterial breathable membrane masterbatch and preparation method thereof

Abstract

The invention discloses an antibacterial gas-permeable membrane masterbatch and a preparation method thereof. The material is made of the following raw material components in parts by weight: polyethylene 30‑95, mineral filling 5‑50, water soluble organic matter 5‑10, lubricant 0.1‑0.5, antibacterial agent 2‑10 and antioxidant 0.1‑0.3 . The preparation method of the material includes the following steps: mixing polyethylene, mineral filling, water-soluble organic matter, lubricant, antibacterial agent and antioxidant in a banbury mixer for 5-8 minutes; and then melt blending through an extruder Extrusion, traction, granulation, and then using the casting process to cast the breathable masterbatch, cooling and shaping, and winding to obtain a polyethylene cast film. In the present invention, minerals are added, water-soluble organic matter is used in combination, and antibacterial agents are added to endow the masterbatch of the polyethylene air-permeable film with better air permeability, safety and sanitation.

Description

technical field [0001] The invention belongs to the technical field of polyethylene materials, and in particular relates to an antibacterial breathable film master batch material and a preparation method thereof. Background technique [0002] Breathable film is a film with tens of thousands of micropores (pore size ranging from a few tenths of a micron to tens of microns) made of polymer materials through a specific production process. It is characterized by breathability and impermeability. It allows water Gases such as steam and air pass through, but liquids are not allowed to pass through. At present, breathable films have been widely used in diapers, sanitary napkins, sanitary pads and other personal hygiene products such as medical clothing, medical gauze, rain cloth, raincoats, food packaging, crop preservation, building waterproofing and other fields. [0003] The common production method of breathable film is to add a certain proportion of inorganic fillers such as ...

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Problems solved by technology

[0003] The common production method of breathable film is to add a certain proportion of inorganic fillers such as calcium carbonate and talcum powder to the polymer, and then extrude it into a sheet / film through a screw, and then stretch it horizontally and vertically. , when the bonding force between the inorganic filler and its surrounding polymer is less than the deformation force of the polymer caused by stretching, the polymer will separate along the edge of the inorganic filler particle, resulting in micropores, the size and shape of which are the same as those of the inorganic filler The particle size, shape and stretching method, stretching ratio and other process conditions are related. There are many influencing parameters, the probability of error is high, the controllability of the micropore size is low, and the defective rate of the produced products is high, which increases the production capacity. Moreover, after long-term use, due to the aging of the film, the bonding force between the particle edge of the inorganic filler and the polymer becomes smaller, which will cause the particles of the inorganic filler to fall off, thereby affecting the water-proof effect

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