Research on the preparation and fluoride-free waterproofing process of the substrate for rainstorm-proof fabrics
To further improve the rainstorm-proof performance of outdoor fabrics,the influence of substrate structure of rainstorm-proof fabrics on rainstorm-proof performance of outdoor fabrics was studied,the fluoride-free waterproofing process was optimized,the rainstorm-proof performance of the fabrics was tested,and substrate structure and fluorine-free waterproofing process of the rainstorm-proof fabrics were finally confirmed.The results showed that:in the case of determining other specifications of the fabric substrate,the elasticity-free fabrics and mechanical weft elasticity fabrics had better rainstorm resistance than fabrics with mechanical four-sided elasticity;the rainstorm resistance increased with the increase of linear density and fabric warp and weft density,and the fabric structure had less effect on the rainstorm resistance.Plain weave fabrics with mechanical weft elasticity,a linear density of 167 dtex,and a warp and weft density of 376×300 pieces/(10 cm)were selected as the base material of rainstorm-proof fabrics,and the waterproofing was carried out.The waterproofing process required a the mass concentration of fluorine-free waterproof agent R3 of 40 g/L,a mass concentration of cross-linking agent TF-569P of 12 g/L,and a liquid carrying rate of 60％by one dipping and one rolling under a baking temperature of 170 ℃ for 90 s.After waterproofing,the water repellency score was 100 points,and after 20 washable tests,the water repellency score could still be maintained at 95 points.Further Bundesmann rainstorm-proof tests were performed on single-layer fabrics,and it was found that the waterproof level could reach the third or fourth grade after 10 min,the water absorption rate was 12.5％,and the water permeability was 10 mL.The research results can provide reference for the preparation of rainstorm-proof outdoor sports fabrics.
fabric elasticitylinear densitywarp and weft densityfabric structurefluoride-free waterproof finish
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