Production process of knitted impregnated PU (polyurethane) gloves applying methyl pyrrolidone

Abstract

The invention relates to a production process of knitted impregnated PU ( polyurethane) gloves. The process comprises the following steps of: impregnating the knitted gloves into a solvent, wherein the solvent is prepared from polyurethane resin and methyl pyrrolidone according to the proportion of 1.3-1:1.8, and the polyurethane resin is synthesized with the participation of methyl pyrrolidone; carrying out the water bath treatment on the impregnated knitted gloves; drying the impregnated knitted gloves after the water bath treatment, wherein the drying time is 50-60min, and the drying temperature is at 100-110 DEG C; and recycling methyl pyrrolidone in the solvent from the water for the water bath with the vacuum depressurization method. The invention also provides a solvent for the production process of knitted impregnated PU gloves, which is prepared from polyurethane resin and methyl l pyrrolidone according to a certain proportion. Meanwhile, the invention provides gloves produced according to the production process of the knitted impregnated PU gloves.

Description

technical field [0001] The invention relates to a production process of knitted impregnated PU gloves, in particular to a process of using methylpyrrolidone (NMP) instead of dimethylformamide (DMF) as a solvent to produce knitted impregnated PU gloves. Background technique [0002] The safety protective gloves impregnated with PU resin based on knitted liner gloves have become the most popular safety gloves in the international market because of their thinner rubber layer, comfortable wearing, good oil resistance, wear resistance, and low cost. An important product, the production and sales volume has been rising continuously in recent years. However, the production of such PU impregnated gloves requires the use of dimethylformamide (DMF) as a solvent, and DMF has high toxicity. If there is DMF residue in the gloves, it will irritate the skin after wearing; at the same time, due to the use of DMF in production As a solvent, it will affect the health protection of employees....

AI Technical Summary

Problems solved by technology

However, the production of such PU impregnated gloves requires the use of dimethylformamide (DMF) as a solvent, and DMF has high toxicity. If there is DMF residue in the gloves, it will irritate the skin after wearing; at the same time, due to the use of DMF in production As a solvent, it will affect the health protection of employees

Due to the above defects in the use of DMF in PU dipped gloves, the European Union has determined that starting from May 2009, the use of DMF as a solvent, including glove products, will be banned, which will have a huge impact on the production and export of glove factories.

[0003] At the same time, DMF is also harmful to the health of operators during the recovery process. In addition, the recovery rate in traditional processes is limited, which not only causes pollutant emissions, but also cannot effectively reduce production costs.