Insulation blankets are an indispensable winter-proofing product for engineering projects. Common types include rock wool blankets and felt blankets made from black-hearted cotton. Both of these products offer good value for money, with prices not differing significantly. Rock wool blankets are made from rock wool filling and flame-retardant fabric for the outer layer, with common fabrics including flame-retardant non-woven fabric, glass fiber cloth, and tri-proof fabric. These products have high flame retardancy, qualifying as A1-grade thermal insulation materials. Felt blankets, while having a lower flame retardancy at B1 level compared to rock wool blankets, do not irritate the skin, making them popular among users. They are made by bonding multiple layers of flame-retardant felt with non-woven fabric, offering good durability.
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