Perforated film capable of being biodegraded completely and preparation process, application and preparation device thereof

Abstract

The invention relates to a perforated film capable of being biodegraded completely and a preparation process, application and preparation device thereof. The perforated film capable of being biodegraded completely is prepared from, by weight, 95-100 parts of plant modified starch, 100-150 parts of biodegradable resin, 2-3 parts of zirconium phosphate silver-loaded antimicrobial powder, 0.5-20 parts of pasting agent, 0.3-10 parts of compatibilizer and 0.2-10 parts of dispersant. The preparation device of the perforated film comprises a low-speed mixing machine for raw material mixing, and a film extrusion molding device, a film perforating device and a winding device which are sequentially arranged. The film extrusion molding device comprises a screw extruder, a melt pump and a T-shaped die head which are sequentially connected and communicated. The preparation process of the perforated film comprises material preparation and pressed film molding processes. The prepared perforated film has an antimicrobial effect and can be biodegraded completely, and the preparation efficiency of the perforated film is improved through the preparation device.

Description

technical field [0001] The invention relates to a fully biodegradable perforated film and its preparation process, application and preparation device. Background technique [0002] Hygienic products that are often used in daily life in contact with the body, such as medical wound dressings, diapers for infants and adults, and feminine sanitary napkins, must have the functions of absorbing liquid, preventing rewet, and being dry and breathable. Therefore, in order to achieve the above functions, it is necessary to use a perforated membrane that can provide permeation and avoid rewetting. Most of the traditional perforated membranes are made of non-degradable materials. These perforated membranes are difficult to dispose of after use. Landfills cause environmental pollution because they cannot be degraded, and incineration will produce a large amount of dioxins and toxic gases. In addition, The production of traditional perforated film is made by secondary molding, that is, t...

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Problems solved by technology

Most of the traditional perforated membranes are made of non-degradable materials. These perforated membranes are difficult to dispose of after use. Landfills cause environmental pollution because they cannot be degraded, and incineration will produce a large amount of dioxins and toxic gases. In addition, The production of traditional perforated film is made by secondary molding, that is, the produced film substrate is softened by the heating system of the punching machine, and the film is formed by vacuum suction in an instant, and the hole shape is formed with the punching. The hole type of the device depends on the shape of the device, and then the finished product is wound by slitting. This secondary molding process has the following disadvantages: high energy consumption, the film needs to be softened and vacuum-formed by a heating device, and then wound by the winding system; the production capacity is too large. Low, too much waste; the process is cumbersome; the perforated film product is of poor quality, it needs to be reheated on the basis of the film, and the toughness and tensile properties of the product become poor after the secondary plasticization caused by high temperature, and the three-dimensional shape of the hole The degree is also poor, so the hole shape on the film cannot form a funnel shape, which is prone to reverse osmosis

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