Update:Are you seeking a reliable dry lamination adhesive that withstands boiling and high-temperature retort sterilization for...
Are you seeking a reliable dry lamination adhesive that withstands boiling and high-temperature retort sterilization for food packaging? Zhejiang Ruico Advanced Materials proudly presents LB 165A paired with Hardener LB 165B, a medium-to-high-end two-component solvent polyurethane adhesive built for versatile multi-layer flexible packaging production.
This adhesive system delivers universal bonding performance across mainstream packaging substrates: aluminum foil, surface-treated PE, BOPP, CPP, PET, nylon, and metalized CPP/PET films. It works seamlessly for film-film, film-metalized film and aluminum-containing composite structures, with specially optimized formula for 70–130 μm thick PE sealing films that many ordinary adhesives fail to bond firmly.
Manufactured with low-viscosity formulation, LB 165A provides excellent surface wetting, adapting to high-speed gravure roller equipment without uneven coating. Fully cured laminates resist 40 minutes of 100°C water boiling and 30 minutes of 121°C retort treatment under standardized operation. It boasts strong initial tack, efficient solvent release, great chemical resistance and stable long-term bonding. After full curing, the adhesive film stays transparent, odor-free, elastic and anti-aging, keeping packaged products with clear visual appearance throughout storage.
Both main agent and hardener use ethyl acetate as solvent, showing clear to pale yellow homogeneous viscous liquid at room temperature. Standard mixing mass ratio is 20:3.5, adjustable to 20:3.0–4.0 for metalized film lamination. Users can dilute the mixture with low-moisture ethyl acetate, acetone or MEK to reach 30%–45% working solids, with accurate viscosity data listed for stable coating control. Note that aromatic and alcoholic solvents are forbidden, as they damage crosslinking effects.
Operators must strictly follow mixing and construction rules. Dilute LB 165A first before adding LB 165B under continuous stirring. Sealed mixed adhesive maintains 8 hours of usable pot life under normal temperature, while tropical high-temperature and high-humidity environments limit pot life to only 2 hours. The recommended dry coating weight ranges from 2 to 3.5 g/m²; printed films require 1 g/m² extra adhesive weight. A three-stage gradient drying temperature from 55°C to 85°C reduces solvent residue, and higher nip roller temperature and pressure further lift bonding strength and optical performance.
Curing follows a clear timeline: triplex composites can be reprocessed 2–4 hours after lamination, and rewinding/slitting is available after 1–2 days. Complete thermal and chemical resistance forms after 7–14 days of room-temperature curing.
Safety and food compliance stand as core advantages of this product. The full cured adhesive meets FDA §175.105, BfR XXVIII, EU plastic directives and China GB 9685-2016, fully safe for food contact. Unopened products enjoy a 9-month shelf life at -30°C to +25°C. Since the hardener contains polyisocyanates, avoid direct skin contact and follow industrial safety standards during operation.
Before mass production, factory trials are highly recommended, as film slip additives, printing inks and surface pretreatment will affect final lamination results. For manufacturers producing boiling bags, retort food pouches and thick PE composite packaging, LB 165A/LB 165B is your top cost-effective and high-performance laminating adhesive solution.
Contact us now for samples and technical support:
Tel: +86 (572) 2903236
Email:
[email protected]
Zhejiang Ruico Advanced Materials Co., Ltd.
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No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China
+86 (572)
2903236
+86 (572)
2905222
+86 15088303595
+86 15088303595
