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Plastics & Elastomers
The material selection platform
Plastics & Elastomers
by SpecialChem
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Pearlbond™ 521

Technical Datasheet | Supplied by Lubrizol
Pearlbond™ 521 by Lubrizol is a linear, polycaprolactone-copolyester polyurethane grade. Exhibits high crystallization rate and a very high thermoplasticity level. Possible applications of Pearlbond™ 521 include production of reactive hot melts (HMPUR), typically used in automotive interior parts, bookbinding, furniture, textile and footwear.
Product Type
TPU or TPE-U (Thermoplastic Polyurethane) > TPU, Caprolactone
Physical Form
Granules, Spherical

Pearlbond™ 521 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
OH Value
< 5 mg KOH/g
( )
15 - 17 min
( )
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
60 - 100 g/10 min
(At 170°C, 2.16 kg)
ISO 1133
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