A green production process of PVC type disposable gloves using water as medium
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A green production, disposable technology, applied in gloves, clothing features, clothing, etc., can solve environmental pollution and other problems
Active Publication Date: 2021-02-12
ZHEJIANG UNIV
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[0004] Aiming at the problem of serious environmental pollution caused by the volatilization of organic solvents discharged into the atmosphere during the preparation of PVC gloves, the present invention uses water as a medium to generate a uniform and stable dispersion of plasticizer-swollen PVC particles in water, and the performance of the prepared PVC gloves can be improved. No organic solvents in the whole process, it is a green production process, which is of great significance to improving the environment
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Embodiment 1
[0036] Embodiment 1: PVC gloves are prepared by plasticizing after swelling first
[0037] (1) The trade mark that present embodiment adopts PVC particle is TPH-31, and nonionic emulsifier is nonylphenol polyoxyethylene ether (TX-4), and plasticizer is dioctyl terephthalate (DOTP), will 100 parts of PVC particles, 4 parts of TX-4 and 160 parts of water are mixed and dispersed to obtain a dispersion of PVC particles containing an emulsifier in water;
[0038] (2) Add 70 parts of DOTP to the PVC dispersion generated in step (1), start to stir and disperse the DOTP on the upper layer, and mix at a low speed to high speed to disperse the stirring to obtain a PVC paste resin emulsion, such as figure 1 As shown, the circular area is the emulsion, the interior of the emulsion is DOTP plasticizer, and the PVC particles gathered at the boundary appear black;
[0039] (3) Stir the emulsion generated in step (2) at a temperature of 40°C with a rotation speed of 70rpm for 6 hours at a slo...
Embodiment 2
[0043] Embodiment 2: Adjust DOTP to prepare PVC gloves with different properties
[0044] (1) The trade mark that present embodiment adopts PVC particle is TPH-31, and nonionic emulsifier is nonylphenol polyoxyethylene ether (TX-4), and plasticizer is dioctyl terephthalate (DOTP), will 100 parts of PVC granules, 4 parts of TX-4 and 160 parts of water are mixed and dispersed to obtain a dispersion of PVC granules containing emulsifiers in water. Repeat the above steps to obtain another two parts of the same PVC granules containing emulsifiers dispersion in water;
[0045] (2) Add 50 parts, 70 parts, and 90 parts of DOTP to the three parts of PVC particle dispersion generated in step (1) respectively, and start stirring to disperse the DOTP in the upper layer, and mix at a low speed to high speed. Get PVC paste resin emulsion;
[0046] (3) Stir the three parts of emulsions generated in step (2) at a temperature of 40° C. at a slow speed of 70 rpm for 6 hours at the same time, ...
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Abstract
The invention discloses a green production process of PVC disposable gloves using water as a medium. Disperse PVC particles in water with a non-ionic emulsifier to form a dispersion; then add a plasticizer to the above dispersion, and stir and heat the plasticizer to form micro-droplets to accelerate the absorption and swelling of PVC particles. agent molecules to form a dispersion of plasticizer-swollen PVC particles in water; finally dip the dispersion with a ceramic or metal hand mold, and let the swollen PVC particles evenly disperse on the surface of the hand mold after dripping for an appropriate time. The hand mold is baked in an oven to make the PVC granules swollen by the plasticizer plasticized and molded, and the PVC gloves are obtained after cooling. The present invention uses water as the medium, and the dispersion liquid of the plasticizer-swollen PVC particles generated in the water is uniform and stable, and the performance of the prepared PVC gloves is adjustable, and the whole process has no organic solvent, which is a green production process and has great significance for improving the environment. .
Description
technical field [0001] The invention discloses a green production process of PVC (polyvinyl chloride) disposable gloves using water as a medium. The performance of the prepared PVC gloves is adjustable, and the whole process is free of organic solvents. It is a green production process and plays an important role in improving the environment. significance. Background technique [0002] PVC disposable gloves have good elasticity and are comfortable to use, and are widely used in homes, hospitals and other places. PVC disposable gloves are generally made of PVC resin mixture (a mixture of PVC resin and other materials, other materials refer to plastic products that are compatible with PVC) as raw materials. In the traditional preparation process, PVC particles, plasticizers (such as: dioctyl terephthalate or DOTP) are usually dissolved in organic solvents (such as: low molecular weight aromatic hydrocarbon solvent naphtha) to form a uniform mixed solution, Finally, dip the m...
Claims
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Application Information
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