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Solid Polyurethane Resin for Heat Seal Lacquer WQ-PR888

Categories Solvent Based Solid Acrylic Resin
Brand Name: WeiLi Resin®
Model Number: WQ-PR888
Certification: ISO9001
Place of Origin: China
MOQ: 5000kg
Price: Negotiable
Payment Terms: T/T,L/C
Supply Ability: 500t/month
Packaging Details: 25kg/bag
Appearance: White granule
Glass Transition Temperature (Tg): 48℃
Solid Content: >99%
Product name: Polyurethane Resin for Heat Seal Lacquer WQ-PR888
‌Key Features: Improves flexibility and toughness of the heat seal layer; Enhances heat seal strength and peel performance
Applications‌: Heat-seal coatings for pharmaceutical packaging, aluminum foil lids, and flexible packaging. Adhesives, inks.
Molecular weight (MV): 16000g/mole
Acid value: 3 Mg KOH/g
Softening point ℃: 118-123
Hydroxy Value (mg KOH/g): 15 Mg KOH/g
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Solid Polyurethane Resin for Heat Seal Lacquer WQ-PR888

Solvent-based Polyurethane Resin for Heat Seal Varnish WQ-PR888
Product Description

WQ-PR888 is a self-film-forming solid polyurethane resin. This resin can be combined with solid acrylic resin (SA-24A) and terpolymer vinyl chloride-vinyl acetate resin (DA60) to formulate high-performance heat-seal coatings. As a key flexible adhesive component in the heat-seal coating formulation, the polyurethane resin WQ-PR888 plays a crucial role in enhancing sealing strength, flexibility, and interlayer adhesion in this system.

When combined with terpolymer vinyl chloride-vinyl acetate resin and acrylic resins, the polyurethane resin effectively improves the cohesion and elasticity of the heat seal layer, helping to prevent cracking, brittleness, and seal failure during heat sealing and subsequent forming or handling processes. It contributes to a wider heat-sealing temperature window and more stable sealing performance under varying processing conditions.

This polyurethane resin WL-PR888 is widely used in heat seal lacquers for pharmaceutical packaging, aluminum foil lids, blister packaging, and flexible packaging applications where reliable adhesion, flexibility, and consistent heat seal performance are required. It can also be cross-linked with amino and isocyanate curing agents for use in inks and adhesives.

Physical Property
PropertiesUnitsValues
Appearance---White granule
Molecular Weightg/mole16000
Softening point ℃118-123
Solid Content%>99.0
Glass Transition Temperature (Tg)48
Acid valueMg KOH/g3
Hydroxy Value (mg KOH/g)Mg KOH/g15
Feature
  • Improves flexibility and toughness of the heat seal layer;
  • Enhances heat seal strength and peel performance;
  • Expands the heat-sealing temperature window;
  • Prevents brittleness and cracking caused by harder resins;
  • Provides good compatibility with chloroacetic and acrylic resins;
  • Can cross-link with isocyanate and amino resins;
  • Used for adhesives, offering excellent edge trimming properties.
Application

Heat-seal coatings for pharmaceutical packaging, aluminum foil lids, and flexible packaging. Adhesives, inks.

Special Tips

This material is complied according to our existing technology and experience, the technical advice provided is sincere, but it is not guaranteed to be used in all samples and formulations, all the data are for users reference only.

China Solid Polyurethane Resin for Heat Seal Lacquer WQ-PR888 factory
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