Polyamide Hot Melts for Oil Filter

PA150 is an amber-granule, high-performance polyamide hot melt engineered specifically as one of the most durable polyamide hot melts for oil filter assembly. Designed for pleat-stiffening ribs and tension-wire tacking in spin-on and cartridge oil filters, it combines a narrow melting range with clean, low-odor processing, helping producers meet REACH and ELV requirements while eliminating solvents from the shop floor.

The adhesive exhibits a ring-and-ball softening point of 145-155 °C and a controlled melt viscosity of 4500 cps at 170 °C. This mid-range viscosity allows PA150 to flow uniformly through swirl-spray nozzles for consistent rib height, yet remains thixotropic enough to prevent sagging on vertical pleats. A short open time (<10 s) means the adhesive solidifies almost immediately after compression, locking pleat geometry and permitting filters to be inverted or transferred without wait, raising takt speed by up to 20 % on rotary machines.

Thermal and chemical durability are the key strengths that distinguish PA150 from EVA or PO alternatives. Continuous immersion tests in 5W-30 synthetic oil at 150 °C for 1000 h show <5 % loss of shear strength, while cyclic exposure to 180 °C under-hood spikes and –40 °C cold-crank cycles causes no cracking or debonding. The polyamide backbone resists gasoline, diesel, biodiesel, brake fluid and glycol-based coolants, ensuring that bonded joints survive the 15 000 km service life typical of passenger-car oil filters without bypass or media collapse.

Because PA150 is 100 % solid and RoHS-compliant, it supports zero-emission filter plants; char formation is minimal, giving a pot life of 48 h at 180 °C and reducing nozzle-cleaning downtime. Whether you are reinforcing heavy-duty diesel cartridges or high-spin synthetic-media elements, this polyamide hot melts for oil filter manufacturing delivers reliable oil resistance, rapid cure and an overall greener, more efficient assembly process.

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