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Production process of waterproof polyving akohol film and application for obtaining waterproof polyving akohol film

A polyvinyl alcohol film and production process technology, which is applied in the field of plastic films, can solve the problems of easy residue of harmful substances, low production efficiency, and impact on use safety, achieve good barrier effect of harmful substances, avoid film surface defects, and improve product quality. Effect

Active Publication Date: 2015-12-16
GRI MEDICAL & ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, some toxic and harmful chemical raw materials are used, not only the production process is complicated, but also the process is dangerous. The use of chemical solvents is easy to cause environmental pollution, low production efficiency, and harmful substances are easy to remain in the film, which affects the safety of use.

Method used

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  • Production process of waterproof polyving akohol film and application for obtaining waterproof polyving akohol film
  • Production process of waterproof polyving akohol film and application for obtaining waterproof polyving akohol film
  • Production process of waterproof polyving akohol film and application for obtaining waterproof polyving akohol film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Take 100kg of 1799 polyvinyl alcohol resin and put it into a thermal mixer with 95°C jacket heating. Add 70 kg of water and 0.2 kg of sodium dodecylsulfonate, and stir for 1 hour at a speed of 5 rpm to obtain swollen polyvinyl alcohol particles.

[0052] The mixed polyvinyl alcohol swollen granules are quickly transferred to a cooling mixer and cooled to room temperature. The cooled polyvinyl alcohol swollen granules are fed into the feed hopper of a twin-screw extruder equipped with a vertical forced feeding slurry. The specification of the twin-screw extruder is a twin-screw extruder with a diameter of 45mm and a length-to-diameter ratio of 40:1 co-rotating combined screw (referred to as a co-rotating twin-screw extruder), 7-stage temperature control, and an open-type discharge in the metering section. The air port is set to 100°C except that the temperature of the feeding section is set to 60°C, and the outlet flange is set to 105°C. The filter screens are double-la...

Embodiment 2

[0055] Take 100kg of 1799 polyethylene and put it into a thermal mixer with jacket heating at 90°C. Add 200 kg of water, 15 kg of glycerin, and 1.5 kg of polyoxyethylene lauryl ether, stir at a speed of 90 rpm for 0.5 hour, cool down to 80° C. and continue stirring for 3 hours to obtain swollen polyvinyl alcohol particles.

[0056] The mixed polyvinyl alcohol swollen granules are quickly transferred to a cooling mixer and cooled to room temperature. The cooled polyvinyl alcohol swollen granules are fed into the hopper of a twin-screw extruder equipped with a vertical forced feed slurry. The specification of the twin-screw extruder is a twin-screw extruder with a diameter of 45mm and a length-to-diameter ratio of 40:1. ℃, the rest are set to 85 ℃, the outlet flange is 90 ℃, the filter screen adopts 60 / 100 mesh double layer, the screw speed is automatically adjusted according to the pressure of the heat preservation feeding pipe, the range is 25-500 rpm, the inside of the barre...

Embodiment 3

[0059] Take 100kg of 1799 polyethylene and put it into a thermal mixer with jacket heating at 90°C. Add 90 kg of water, 0.4 kg of polyoxyethylene lauryl ether, and 10 kg of butanediol, and stir for 2 hours at a speed of 20 rpm to obtain swollen polyvinyl alcohol particles.

[0060] The mixed polyvinyl alcohol swollen granules are quickly transferred to a cooling mixer and cooled to room temperature. The cooled polyvinyl alcohol swollen granules are fed into the hopper of a twin-screw extruder equipped with a vertical forced feed slurry. The specification of the twin-screw extruder is a twin-screw extruder with a diameter of 45mm and a length-to-diameter ratio of 40:1. ℃, the rest are set to 95 ℃, the outlet flange is 100 ℃, the filter screen adopts 60 / 100 mesh double layer, the screw speed is automatically adjusted according to the pressure of the heat preservation feeding pipe, the range is 15-30 rpm, the inside of the barrel The pressure is 1.2MPa, and the temperature of t...

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Abstract

The invention discloses a production process of a waterproof polyving akohol film. At present, an aqueous solution salivate method for producing the polyving akohol film has the disadvantage of higher energy consumption cost, and a better waterproof film is difficult to obtain with a melt extrusion method. Polyving akohol and other raw material components are subjected to mix swelling, extrusion, salivation, drying, heat treatment, edge cutting and rolling processes sequentially to form the waterproof polyving akohol film; the mix swelling process comprises that all raw material components are stirred and mixed in a hot mixing machine with jacket heating after weighted; at mixing endpoint, obtained polyving akohol particles are swelled into an elastic, non-adhesive and transparent jelly shape, and no free moisture exists among particles. Polyving akohol resin absorbs moisture to swell through heating and mixing, so that the melting temperature of the polyving akohol resin is reduced, the energy consumption in the production process can be reduced greatly, and a plasticizer can be reduced or even isn't used.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a production process of a water-resistant water-soluble polyvinyl alcohol film used as protective clothing and an application of the obtained polyvinyl alcohol film. Background technique [0002] Disposable protective products, such as medical surgical gowns, surgical drapes, isolation protective clothing, radioactive solid particle protective clothing, etc., are disposable, which provides convenience for medical staff, patients, and nuclear industry workers, greatly reducing Relevant personnel are at risk of cross-infection and contamination by harmful substances during treatment and work, which reduces the postoperative infection rate, greatly improves people's health, and reduces the use of antibiotics. In order to improve the ability of disposable protective clothing to isolate pathogens or harmful substances, protective clothing generally uses composite fabrics, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K5/42C08K5/053B29C69/02B29C47/00B29C41/28B29C41/52B29D7/01B29L7/00B32B27/30
Inventor 方海素唐岷杨朝群肖先德
Owner GRI MEDICAL & ELECTRONICS TECH CO LTD
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