Hot Melt Glue Granules for Air Filter

1. Ultra-Fast Set Speed

TH-89A is engineered for high-speed rotary or blade pleating lines. The adhesive begins to gel in 2–4 s at 20 °C ambient, allowing the next fold to be made almost immediately and eliminating "spring-back" that can ruin filter geometry. This rapid solidification means stacks can be transferred to curing racks or post-heat tunnels without clamps, raising hourly throughput by up compared with conventional EVA granules.

2. Filter-Paper Locking Power

The formulation incorporates polar tackifiers that anchor tenaciously to cellulose, glass-microfiber, polyester and dual-layer composite media. T-peel values on 120 g m-2 filter paper exceed 4.5 N cm-1, yet the bond remains flexible enough to absorb pulse-cleaning shocks in automotive and industrial dust collectors. The result is sharp, permanent pleats that maintain rated surface area and low pressure drop for the service life of the filter.

3. Medium Open Time for Precise Adjustment

While it sets quickly once compressed, TH-89A offers a 4–8 s open window (at 160 °C pot temperature) so operators can realign mis-fed sheets or correct pleat spacing before the bond locks. This balance prevents waste on start-up and reduces rejected cartridges.

4. Clean, White Appearance

The pure-white granules melt to a crystal-clear bead that will not discolor premium white or pastel filter media. No char, no smoke, no gel formation after 72 h in the melter-keeping nozzles clean and minimizing maintenance downtime.

5. Green & Safe Chemistry

TH-89A is 100 % solids, zero VOC, RoHS, REACH and TSCA compliant. It contains no formaldehyde, phthalates or heavy metals, making it safe for indoor HVAC applications and recyclable at end-of-life. Low odor improves operator comfort and meets stringent automotive OEM workplace limits.

6. Thermal & Chemical Durability

Service temperature range –20 °C to +85 °C continuous, with short peaks to 130 °C in engine-bay filters. Resists oil mist, fuel vapor, alkaline dust and 95 % RH cycles, ensuring pleat integrity in heavy-duty trucks, power-gen sets and clean-room ceiling modules alike.

7. Easy Conversion

Uniform 3–5 mm granules feed smoothly into standard 5 L–50 L melters without bridging. Recommended application temperature 150–170 °C; viscosity 3 800 cP at 170 °C gives fine, controlled spray or slot-coat patterns. Compatible with PP, PET and metal mesh support layers.

Choose TH-89A hot melt glue granules for air filter manufacturing when you need speed, strength, sustainability and spotless aesthetics-all in one white pellet.

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