Formaldehyde and Ammonia-containing dye
Formaldehyde
Various shade fabrics often undergo anti-shrinkage, anti-scalding, anti-wrinkle and color fixing treatments during dyeing and finishing. Generally, cross-linking reactions are required, and formaldehyde is a widely used cross-linking agent.
Due to the incompleteness of cross-linking, formaldehyde that did not participate in the cross-linking reaction or formaldehyde produced by hydrolysis will be released from the sunshade fabric, which will cause strong irritation to the respiratory tract mucosa, skin and eyes, causing inflammation, even inducing allergy and cancer.