Patent ID: 11958934
Assignee: SHIMU SPECIAL PROTECTIVE EQUIPMENT TECHNOLOGY (JIANGSU) CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 8:
9. A method for dipping knitted gloves with a waterborne polyurethane (WPU) emulsion, the WPU emulsion comprising the following raw materials in part by weight: 230-250 parts of polyol, 50-60 parts of isocyanate, 5-10 parts of a hydrophilic chain extender, 60-80 parts of a diluent, 5-9 parts of a neutralizer, 500-600 parts of water, 15-20 parts of a post chain extender, 0.01-0.05 parts of a catalyst, 3-7 parts of a cellulose thickener, 0.5-1.5 parts of a wetting agent, and 3-5 parts of a dispersant; and the method comprising the following steps:
a, slurry spraying: sleeving a knitted glove lining on an assembly line mold, heating to 30-60° C., spraying a first layer of the WPU emulsion on a surface of the knitted glove lining using a slurry spraying mode, initially curing for 10-20 min at 50-90° C., and fully curing for 10-20 min at 100-130° C. to obtain a layer of dipped gloves;
b, dipping: cooling the layer of dipped gloves fully cured in step a to 30-60° C., coating a surface of the layer of dipped gloves with second to fourth layers of the WPU emulsion using a dipping mode, and fully curing for 10-20 min at 90-110° C. to obtain rough gloves; and
c, demoulding: cooling the rough gloves obtained after dipping above to 30-60° C., coating a surface with the WPU emulsion by spraying or dipping, initially curing for 2-10 min at 50-90° C., fully curing for 10-20 min at 100-130° C., and cooling and demoulding.