Update:Residual solvent exceeding standard is a common quality defect in flexible packaging, which may lead to odor complaints ...
Residual solvent exceeding standard is a common quality defect in flexible packaging, which may lead to odor complaints and customs rejection. LB 165A and LB 165B polyurethane adhesive features excellent solvent release capacity, effectively solving this industry pain point.
With matched three-stage gradient drying temperature (55–65°C / 65–75°C / 70–85°C) and reasonable air volume setting, the adhesive system volatilizes solvent thoroughly during drying section. Meanwhile, it retains core advantages including high initial tack, strong heat resistance and universal substrate bonding capacity, applicable to aluminum foil, metalized film, nylon, PET and thick PE composite packaging.
The low-viscosity main agent realizes full surface wetting without excessive glue usage. Dry coating weight can be adjusted between 2–3.5 g/m² according to actual demand, with extra dosage for printed films to offset ink absorption. The mixed glue’s viscosity data under different solid contents is clearly listed in the official technical sheet, convenient for workers to adjust production parameters.
Operational standards must be followed strictly: dilute LB 165A before adding hardener, and finish mixed glue within the regulated pot life to prevent crosslinking failure. Laminated films can be rewound and slit after 1–2 days, and reach complete solvent-free and heat-resistant state after 7–14 days curing.
This product has complete food safety certifications for domestic and overseas markets. Unopened drums and cans can be stored for 9 months within -30°C to 25°C. Operators shall avoid skin contact with hardener and abide by chemical safety specifications.
If your factory often encounters residual solvent unqualified issues, switch to Ruico LB 165A/LB 165B adhesive to stabilize product quality and cut after-sales losses.
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