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HMA （hot melt adhesive）The hot melt adhesive is attached to the surface of the aluminum foil. When making the air duct, the materials are heated in the oven to form a sticky bond.
Hot melt adhesive is made of PVC or PE。
The aluminum foil has stiffness and will not retract after installation, which can maintain the flatness of the hose and play a certain flame retardant role.
PET increases tensile strength, making the hose less prone to breakage and moisture-proof
In addition to the above specifications, other special requirements can design according to customers
HMA Aluminum foil(double side)