Formaldehyde, chemical formula HCHO or CH?O, formula weight 30.03, also known as formic aldehyde. It is a colorless gas with a special pungent smell, which is irritating to human eyes and nose. The relative density of the gas is 1.067 (air = 1), and the liquid density is 0.815g/cm³ (-20℃). The melting point is -92℃, and the boiling point is -19.5℃. It is easily soluble in water and ethanol. The concentration of the aqueous solution can reach 55%, usually 40%, which is called formaldehyde water, commonly known as formalin, which is a colorless liquid with a pungent smell.

The main harm of formaldehyde is the irritation to the skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people will feel uncomfortable. Formaldehyde concentrations greater than 0.08m3 can cause red eyes, itchy eyes, throat discomfort or pain, hoarseness, sneezing, chest tightness, asthma, dermatitis, etc. The formaldehyde content in newly renovated rooms is high, which is the main cause of many diseases.

The raw material of Non-woven Shopping Bag - non-woven fabric, also known as non-woven fabric, is composed of directional or random fibers. It is a new generation of environmentally friendly material with the characteristics of moisture-proof, breathable, flexible, lightweight, non-combustible, easy to decompose, non-toxic and non-irritating, rich colors, low price, and recyclable.