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CN-116941841-B - Polyvinyl alcohol chemical-resistant glove and manufacturing method thereof

CN116941841BCN 116941841 BCN116941841 BCN 116941841BCN-116941841-B

Abstract

A polyvinyl alcohol chemical-resistant glove and a manufacturing method thereof belong to the technical field of glove materials and processing. The polyvinyl alcohol chemical-resistant glove comprises an inner liner layer and a PVA outer layer, wherein a water-based latex blending layer is formed between the PVA outer layer and the inner liner layer, and is prepared from the following raw materials, by weight, 10-90 parts of PVA, 140-200 parts of water-based latex, 8.0-15 parts of glycerol, 5.0-15 parts of polyglycerol, 2.0-4.0 parts of high-molecular water-absorbent resin, 0.5-1.5 parts of defoaming agent, 0.5-2.0 parts of bridging agent and 300-400 parts of water. The invention can effectively reduce the probability of hydrogen bond formation between PVA molecular chains, destroy the regular structure of the film, reduce the crystallinity, thereby reducing the PVA hardness and improving the softness and thickness uniformity of the glove.

Inventors

  • YU JIE
  • GU LINGXIAO
  • ZHENG ZIPING
  • ZHENG SHANGJUN

Assignees

  • 台州达顿安防科技有限公司

Dates

Publication Date
20260512
Application Date
20230726

Claims (9)

  1. 1. The polyvinyl alcohol chemical-resistant glove comprises an inner liner layer and a PVA outer layer, and is characterized in that a water-based latex blending layer is formed between the PVA outer layer and the inner liner layer, and the water-based latex blending layer is prepared from the following raw materials in parts by weight: 10-90 parts of PVA, 140-200 parts of water-based latex, 8.0-15 parts of glycerol, 5.0-15 parts of polyglycerol, 2.0-4.0 parts of polymer water-absorbent resin I, 0.5-1.5 parts of defoamer, 0.5-2.0 parts of bridging agent I and 300-400 parts of water; The water-based latex blending layer is in direct contact with the PVA outer layer, so that the probability of hydrogen bond formation between PVA molecular chains is effectively reduced, the regular structure of the film is destroyed, and the crystallinity is reduced.
  2. 2. The polyvinyl alcohol chemical-resistant glove according to claim 1, wherein the weight part of PVA in the aqueous latex blend layer is 35 to 60.
  3. 3. The polyvinyl alcohol chemical-resistant glove according to claim 1, wherein the aqueous latex is one or more selected from the group consisting of natural rubber, butyl rubber, nitrile rubber and aqueous PU.
  4. 4. The polyvinyl alcohol chemical-resistant glove according to claim 1,2 or 3, wherein the high molecular water-absorbent resin is one or more selected from the group consisting of an acrylamide-acrylonitrile-acrylic acid terpolymer, a starch acrylate polymer, a starch-acrylonitrile graft copolymer and a polyacrylate.
  5. 5. A polyvinyl alcohol chemical-resistant glove according to claim 1,2 or 3, wherein the bridging agent is one or more selected from epoxy silane polymers, blocked isocyanates, melamine and aziridines.
  6. 6. The polyvinyl alcohol chemical-resistant glove according to claim 1, 2 or 3, wherein the PVA outer layer is made from raw materials comprising the following weight parts: 45-55 parts of PVA, 5.0-10 parts of glycerol, 10-16 parts of polyglycerol, 2.0-4.0 parts of polymer water absorbent resin II, 0.5-1.5 parts of defoamer, 0.5-2.0 parts of bridging agent II and 400-500 parts of water.
  7. 7. The polyvinyl alcohol chemical-resistant glove according to claim 6, wherein the water-absorbent polymer resin II is one or more selected from the group consisting of an acrylamide-acrylonitrile-acrylic acid terpolymer, a starch acrylate polymer, a starch-acrylonitrile graft copolymer and a polyacrylate.
  8. 8. The polyvinyl alcohol chemical-resistant glove according to claim 6, wherein the bridging agent II is one or more selected from the group consisting of epoxy silane polymers, blocked isocyanates, melamine and aziridines.
  9. 9. The manufacturing method of the polyvinyl alcohol chemical-resistant glove is characterized by comprising the following steps of: A. sleeving an inner liner layer on a glove mold, heating the mold, immersing a coagulating agent, drying, spraying or immersing into aqueous latex blending slurry to form an aqueous latex layer, and drying to form a semi-finished glove product with the aqueous latex layer on the surface of the inner liner layer, wherein the aqueous latex blending slurry comprises the following raw materials in parts by weight: 10-90 parts of PVA, 140-200 parts of water-based latex, 8.0-15 parts of glycerol, 5.0-15 parts of polyglycerol, 2.0-4.0 parts of polymer water-absorbent resin I, 0.5-1.5 parts of defoamer, 0.5-2.0 parts of bridging agent I and 300-400 parts of water; B. spraying or immersing into PVA slurry to form a PVA outer layer on the surface of the water-based latex layer, drying, and demolding to obtain the finished PVA chemical-resistant glove.

Description

Polyvinyl alcohol chemical-resistant glove and manufacturing method thereof Technical Field The invention relates to a polyvinyl alcohol chemical-resistant glove and a manufacturing method thereof, belonging to the technical field of glove materials and processing. Background The chemical-proof gloves are used as protective articles for production operators, and are mainly used for protecting hands when the operators touch chemical solvents. The chemical-proof glove can be made of different materials according to the components of the contacted chemicals, and is applied to working environments such as chemical industry, printing and the like. Although the conventional chemical protective gloves are of a large variety, most gloves are uncomfortable to use due to characteristics such as stiffness and inflexibility, and are not easy to control by an operator due to factors such as stiffness of the glove. For the material of antichemical gloves, such as the existing butyronitrile gloves, the quality problems of glue penetration, gumming and the like often occur during production and processing, so that the performances of the gloves such as pressure resistance, sealing performance and the like are poor, the chemical solvent resistance of the gloves serving as antichemical gloves is seriously affected, the antichemical gloves made of polyvinyl alcohol (PVA) material and chlorine Ding Caizhi are also available, the glove made of polyvinyl alcohol material is the only glove suitable for treating strong organic solvents, the defects of chlorine Ding Shoutao and butyl gloves can be well overcome in antichemical aspect, and production operators who contact toxic solvents such as toluene, xylene and the like in chemical industry often need to wear protective antichemical gloves to protect the gloves from corrosion or prevent hands from contacting harmful substances, and the antichemical gloves can also be well applied. As disclosed in the prior art Chinese patent application (publication No. CN 112126016A), the PVA chemical-resistant glove is prepared by adopting a three-layer dipping process, the process is complex, the three-layer dipping slurry is PVA slurry, the production efficiency is low, the penetration lining is easy to cause due to the fact that the single PVA slurry is easy to penetrate, the palm part of the glove is thick, the cuff is thin, the appearance is rough, the defects of insufficient protective performance and uneven hardness of the glove exist, meanwhile, the glove is made of PVA slurry substantially, the whole thickness is large under the condition that all three layers are made of PVA, and a large number of hydrogen bonds are contained in a PVA molecular chain, acting force among the hydrogen bonds is strong, a regular crystallization area is easy to form, so that the PVA film is hard and brittle, and the problems of rigidity and the like of the glove in the use still exist. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides a polyvinyl alcohol chemical-resistant glove and a manufacturing method thereof, and solves the problems of good flexibility and uniform thickness and quality of the glove. The invention discloses a polyvinyl alcohol chemical-resistant glove which comprises an inner liner layer and a PVA outer layer, wherein a water-based latex blending layer is formed between the PVA outer layer and the inner liner layer, and the water-based latex blending layer is prepared from the following raw materials in parts by weight: 10-90 parts of PVA, 140-200 parts of water-based latex, 8.0-15 parts of glycerol, 5.0-15 parts of polyglycerol, 2.0-4.0 parts of polymer water absorbent resin I, 0.5-1.5 parts of defoamer, 0.5-2.0 parts of bridging agent I and 300-400 parts of water. By improving the layer structure of the polyvinyl alcohol (PVA) glove, a structural system of a water-based latex blending layer is formed between the inner lining layer and the PVA outer layer, and the problem that all PVA materials are hard can be effectively solved. Specifically, be equivalent to bonding inner liner and PVA outer layer together through aqueous blending latex layer, the aqueous latex molecular chain that adopts is softer, make it be located between the inner liner of gloves and the PVA outer layer, can direct contact between PVA outer layer and the aqueous latex blending layer in the centre, be equivalent to dispersing in the base member of PVA outer layer, can effectively reduce the probability that forms the hydrogen bond between the PVA molecular chain, destroy its regular structure of film formation, reduce the crystallinity, thereby reduce PVA's hardness, improve its compliance, can also effectually solve the difficult control of glove film formation and poor problem when adopting the gloves shaping that PVA leads to completely, make fashioned glove thickness even and make whole hardness quality even, and through the hydroxyl gene reaction in the bridgi