Introduction
Chloroprene (neoprene) chemical-resistant gloves are widely used for protection against acids, solvents, and industrial chemicals. Traditional gloves often perform poorly in wicking sweat or blocking hazardous penetration. To overcome these issues, Guangzhou Red Sunshine Co., Ltd. adopts a dual-dip method using advanced formulations, providing gloves with superior flexibility, high chemical resistance, and outstanding comfort for long-term wear.
Production Process of Chloroprene Chemical-Resistant Gloves
1. Preparation of Pre-vulcanized Chloroprene Latex
Chloroprene latex is thoroughly blended with mineral fillers, vulcanizing agents (zinc oxide, magnesium oxide), surfactants (such as sodium dodecyl sulfate or sodium dodecylbenzenesulfonate), accelerators (thiazoles, dithiocarbamates, thioureas like TMTD, ZDC, CA), and antioxidants. The mixture is stirred, filtered, and allowed to stand at room temperature for 8–48 hours, forming a stable, pre-vulcanized latex suitable for continuous production.
2. Formulation of Dual-Dip Compounds
Two different dipping compounds are prepared by thickening the pre-vulcanized chloroprene latex to specific viscosities using thickeners (such as carboxymethyl cellulose, sodium polyacrylate, casein, polyvinyl alcohol, hydroxyethyl or hydroxymethyl cellulose).
- The first compound is thickened to 1800–2000 mPa·s for the base layer.
- The second is thickened to 900–1200 mPa·s for the surface layer.
3. Glove Former Preparation
A glove liner, made from synthetic fiber or cotton, is placed on a clean ceramic or metal hand former. This not only adds comfort but enhances moisture management during use.
4. First Dip (Base Layer Application)
The glove former, with the liner fitted, is dipped into the first chloroprene compound. The former is rolled, sprayed, and allowed to drip, ensuring full and even coverage. Excess compound is leveled, and the glove is pre-cured in an oven at 60–80°C for 10–30 minutes, solidifying the base layer and preparing the surface for the next dip.
5. Second Dip (Surface Layer Application)
After cooling, the glove formers are dipped into the second chloroprene compound, which has a lower viscosity. Rolling, dipping, and leveling steps are repeated. Afterward, the gloves are immersed in a coagulant bath (5–25% calcium nitrate or calcium chloride solution in water/methanol) to solidify the outer coating and enhance bonding.
6. Dual-Stage Vulcanization
The gloves are first vulcanized at a lower temperature (70–110°C for 10–40 minutes) to avoid bubbling, followed by high-temperature vulcanizing (100–140°C for 1–4 hours) for final shaping and strength.
7. Final Washing, Drying, and Quality Control
The finished gloves undergo thorough washing to remove chemical residues, then are dried, cooled, removed from the mold, and subjected to stringent quality inspection before packaging.
Technical Advantages
- The dual-layer chloroprene structure dramatically improves anti-permeation and chemical resistance, achieving EN374 grade 3 or above for a wide range of chemicals.
- The liner increases softness, wicking, and comfort, resolving the discomfort and moisture build-up common in single-dip neoprene gloves.
- Process optimization reduces defective rates and production costs and enhances both batch consistency and product quality.
- The gloves are suitable for prolonged use (3-4 hours dry comfort) and have been field-tested to outperform conventional products in chemical protection.
Conclusion
With this advanced patented process, Guangzhou Red Sunshine Co., Ltd. delivers chloroprene chemical gloves tailored for OEM/ODM, laboratory, cleaning, and industrial safety demands worldwide.
Contact us for OEM, custom formulations, bulk orders, or CE/EN374 certified chemical glove solutions.
Post time: Jul-23-2025