What is flame retardant hot melt adhesive film

Flame retardant hot melt adhesive film is a kind of Adding functional flame retardants to polymer substrates ‌, a solid adhesive film made by coating or casting process. It has bonding function after being heated and melted, and can ‌ Inhibits flame spread, no melting or self-extinguishing ‌, thus improving the fire safety level of composite products. ‌‌

Core features

• ‌Flame retardant mechanism‌: Flame retardants (such as aluminum hydroxide, etc.) are introduced through physical blending or chemical grafting, and the combustion chain is blocked by mechanisms such as endothermic decomposition, covering and isolating oxygen, and inhibiting free radical reactions.

• ‌Environmental protection and safetybelong solvent-free ‌No VOCs emissions from materials, production and use processes； High-end products comply with ‌ Halogen-free ‌Requirements: low smoke, non-toxic when burning, and meeting international standards such as RoHS, REACH and UL94-V0.

• ‌Process advantages‌: The thickness is uniform and controllable, suitable for automated hot pressing (temperature usually 80-185°C), replacing traditional solvent-based flame retardant glue, improving production efficiency and reducing workshop fire hazards. ‌‌

Common material systems

• ‌PES (polyester)‌: Most commonly used in electronic shielding material composites, which have high requirements for thickness accuracy and flame retardancy.

• ‌TPU (thermoplastic polyurethane)‌: It has good elasticity and washability, and is often used in shoe materials, car interiors and flexible electronic products.

• ‌PA (polyamide)‌: Excellent comprehensive performance, resistant to boiling water, some functional products can reach V0 level flame retardant, suitable for luggage and car interiors.

• ‌ EVA/PO ‌: Low cost, basic flame retardant effect can be achieved through modification, and used for general industrial compounding. ‌‌

Main application scenarios

• ‌Electronic appliances‌: Mobile phone protective cases, battery pack insulation layers, conductive cloth and foam composites must meet the UL94 fire rating.

• ‌Transportation‌: Car interior panels, seat fabrics, and floor mats are composite and meet automotive grade flame retardant and safety standards.

• ‌Construction and protection‌: The bonding of fire door core panels and the composite of protective clothing fabrics must pass national standard tests such as GB/T 20286. ‌‌

Be specific when purchasing Flame retardant grade requirements ‌(such as UL94 V-0/V-1/V-2 or GB standard), the temperature resistance range and bonding strength corresponding to different substrates are quite different. It is recommended to customize the selection according to the fire protection regulations of the end product. ‌‌