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UNI-REZ™ 2638

1 of 47 products in this brand
UNI-REZ 2638 hot melt polyamide adhesive is a resin based on dimer acid. UNI-REZ 2638 hot melt polyamide adhesive has good low temperature flexibility and adhesion to various plastic substrates.

Chemical Family: Polyamides

End Uses: Hot Melt Adhesive

Features: Chemical Resistance, Excellent Adhesion

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Identification & Functionality

Chemical Family
CASE Ingredients Functions
Technologies

Features & Benefits

Product Highlights
  • Moderate to long open time
  • Low-temperature flexibility
  • Excellent high/low-temperature cycling
  • Good adhesion to plastic, including

Applications & Uses

Adhesive & Sealant Type
Applications
  • Cabinet assembly
  • Converting/ Packaging
  • Multipurpose Assembly
  • Low-pressure molding

Properties

Sales Specifications
ValueUnitsTest Method / Conditions
Softening Point (Ring & Ball)135 - 150°CASTM E28 (AQCM 003)
Viscosity LVT Brookfield, Spindle #31, cps/mPA.s 190°C3500 - 5500ASTM D3236 (AQCM 146)
Color , 40% in n-Butanolmax. 7GardnerAQCM 002
Typical Properties
ValueUnitsTest Method / Conditions
Acid Number0.9mg KOH/gAQCM 001
Amine Number9.0mg KOH/gAQCM 139
Color , 40% in n-Butanol5.0GardnerAQCM 002
Moisture Quintel Moisture Analyzer0.29%AQCM 056
Tensile Strength200 (1.4)MpaASTM D1708
Elongation at Break200.0%ASTM D1708
Tensile Modulus4500 (31)MpaASTM D638
Peel Strength pli, plasticized PVC to itself20 (88)N/25mmASTM D1876
Mandrel Bend Flexibility (1” diameter), pass-35.0°CASTM D3111
Open Time seconds, 10 mil film20.0ASTM D4497
Shear Adhesion Failure Temp (SAFT), 1 kg. wt. C130.0ASTM D4498
Hardness78Shore AASTM D2240-97
Water Absorption after 24 hours1.0%ASTM D570
Water Absorption after 7 days2.2%ASTM D570
Pounds per gallon 25°C8.2 (0.98)g/ccASTM D792
Flash Point (COC)287 (520)°C (°F)ASTM D92-16

Technical Details & Test Data

Viscosity/Temperature Curve

Kraton UNI-REZ 2638 Viscosity/Temperature Curve

Packaging & Availability

Packaging
  • UNI-REZ 2638 hot melt polyamide adhesive is in pellet form, packaged in poly-foil lined multi-wall bags, 40 or 50 lb . net

Storage & Handling

Storage

This product will slowly absorb moisture from the air, which may cause foaming when the resin is melted and could result in inadequate bonds. Partially used containers should be closed tightly, or the remaining resin transferred into an airtight container and kept in a cool, dry area.