With the rapid upgrading of flexible packaging and industrial film lamination industries, single-performance laminating adhesives can no longer fit customized production needs. Different packaging structures, film materials and end-use scenarios require adhesive layers with varying softness and hardness. To solve the pain point of fixed hardness of conventional solvent-free polyurethane adhesives, a new-generation solvent-free PU laminating adhesive with customizable soft and hard formula has been launched. It realizes free adjustment of adhesive layer hardness, perfectly covering full-scene lamination needs and breaking the performance limitation of traditional single-formula adhesives.
Most common solvent-free laminating adhesives on the market adopt fixed molecular chain structures after curing, with invariable hardness and toughness. Rigid adhesive formulas are prone to film cracking and edge peeling for soft flexible bags, while overly soft adhesives suffer from poor flatness and low surface hardness for rigid composite films. This one-size-fits-all defect forces packaging manufacturers to stock multiple types of adhesives for different production lines, raising inventory cost and complicating production management procedures.
This innovative solvent-free PU adhesive adopts a modular molecular structure design, supporting stepless adjustment of adhesive hardness by simply changing the mixing ratio of A and B components without modifying production equipment or adjusting laminating process parameters. Manufacturers can freely switch between soft formula, medium-hard formula and high-hard formula according to actual production demands on the same laminating machine, realizing one adhesive for multiple production scenarios.
The adjustable hardness function delivers targeted bonding performance for diverse lamination scenarios. When configured to a soft formula, the cured glue layer features excellent flexibility and bending resistance. It adapts to frequent folding, twisting and extrusion of flexible food pouches, plastic soft packaging bags and vacuum packaging films, avoiding glue layer fracture and composite delamination during product bending and transportation. When switched to a high-hardness formula, the adhesive forms a rigid, smooth and scratch-resistant glue surface, ideal for hard composite films, cosmetic outer packaging, card film lamination and industrial rigid protective films, maintaining long-term flatness and high surface toughness of composite materials.
Besides flexible hardness adjustment, the product retains all core advantages of high-end solvent-free adhesives. It features 100% solid content, zero VOC emission and solvent-free residue, complying with global environmental standards. It maintains stable bonding strength for mainstream substrates including PET, OPP, PE, nylon and aluminized films, with high transparency and no yellowing to protect printed patterns. It is compatible with high-speed laminating equipment, ensuring smooth operation without bubbles, wrinkles or poor compounding defects during continuous mass production.
For packaging factories with diversified order demands, this adjustable adhesive greatly optimizes the production process. Enterprises no longer need to replace glue barrels, clean pipelines and debug processes frequently when switching different orders, cutting downtime loss and labor costs significantly. Meanwhile, unified adhesive inventory reduces warehouse management pressure and lowers overall procurement costs for manufacturers.
Industry professionals stated that customized and scenario-oriented adhesive products are the inevitable development direction of the lamination industry. This hardness-adjustable solvent-free PU adhesive fills the market gap of multi-scene universal adhesives. Combining flexible formula adjustment, stable composite performance and eco-friendly properties, it effectively solves the production pain points of multi-order and multi-material manufacturers, providing a cost-effective and flexible universal lamination solution for the whole industry.
English
España
русский
Deutsch
No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China
+86 (572)
2903236
+86 (572)
2905222
+86 15088303595
+86 15088303595
