First, the nature of formaldehyde
Formaldehyde is a colorless, pungent gas with a strong odor, and its 35% to 40% aqueous solution is known as formalin. Formaldehyde is a protoplast poison that can bind to proteins. After inhaling high concentrations of formaldehyde, severe respiratory irritation and edema, eye irritation, headache, and bronchial asthma can occur. Direct contact with formaldehyde can cause dermatitis, pigmentation, and necrosis. Frequent inhalation of a small amount of formaldehyde, can cause chronic poisoning, mucosal congestion, skin irritation, atopic dermatitis, nail keratosis and fragility, nail bed pain. Systemic symptoms include headache, fatigue, poor appetite, palpitations, insomnia, weight loss, and autonomic disorders.
Second, the source of formaldehyde
Various artificial boards (particleboard, fiberboard, plywood, etc.) may contain formaldehyde due to the use of an adhesive. The production of new furniture, the laying of walls and floors, the use of adhesives. Wherever a large amount of adhesive is used, there is always formaldehyde release. In addition, some chemical fiber carpets and paints also contain a certain amount of formaldehyde. Formaldehyde can also come from a variety of chemical light industrial products such as cosmetics, detergents, insecticides, disinfectants, preservatives, printing inks, paper, textile fibers.
Second, formaldehyde harms health
1. Stimulating effect: The main hazard of formaldehyde is the stimulating effect on the skin and mucous membrane. Formaldehyde is a protoplasmic toxic substance, which can bind to protein and cause severe respiratory irritation and edema, eye irritation and headache when inhaled at high concentration.
2, sensitization: direct contact with formaldehyde can cause allergic dermatitis, pigmentation, necrosis, inhalation of high concentrations of formaldehyde can induce bronchial asthma.
3. Mutagenic effect: High concentration of formaldehyde is also a genotoxic substance. Experimental animals can cause nasopharyngeal tumors when inhaled at high concentrations in the laboratory.
Note: The formaldehyde in the newly renovated house will exceed the standard. As long as one or two pots of spider orchids are placed in the new house, all the formaldehyde will be absorbed.
Third, textile printing and dyeing auxiliaries limit formaldehyde
Textile auxiliaries that make the amount of formaldehyde in the textiles that are in direct contact with the skin exceed 30 ppm and the amount of formaldehyde in all other textiles exceeds 300 ppm, such as wool protectants containing excessive amounts of formaldehyde, fixing pens, crosslinkers, binders Wait.
Limiting the amount of free and partially hydrolyzed formaldehyde in textile dyes, ensuring that the amount of free and partially hydrolyzed formaldehyde on the fabric does not exceed 30 ppm for textiles that come into direct contact with the skin, but not for all other textiles. More than 300ppm.
Heavy metal salts (other than iron) or formaldehyde cannot be used as a decolorizer or fading agent in textiles.
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