Adhesive Thermoplastic Polyurethane Technologies
4 different TPU-based technologies for your most demanding
applications.
TPU Hot Melt Adhesives
Thermoplastic Polyurethane for Hot Melts are special lineal TPUs supplied in pellet form with high
thermoplasticity and different crystallization rates. They can be applied by extrusion
process or sintering.
For many applications Thermoplastic Polyurethane for Hot Melts are favored for their versatile adhesive
performance characteristics, improved economy and environmental friendliness.
Thermoplastic Polyurethane for Hot Melts present the following advantages:
- Better range of adhesion to different substrates (thanks to polar groups)
- Wide crystallization range
- Wide melting range (70°-140°C)
- Provide excellent low temperature flex
properties (low Tg)
- High elasticity and softness
Water Dispersible TPU Pellets
The water dispersible pellets are Thermoplastic Polyurethane in pellet form, with ionomeric groups incorporated in. These TPUs can be firstly dissolved in acetone, and later by means of an emulsification process, it is possible to obtain an aqueous TPU dispersion. This is a Patented process.
Adhesive manufacturers can produce aqueous TPU dispersions themselves, with the
following benefits:
-
Deacrease shipment costs
- Increase adhesive stability
- Free choice of specific TPU dispersion properties to differenciate their adhesives
These Water Dispersible Thermoplastic Polyurethane dispersions are used to manufacture adhesives designed for markets such
as the automotive,
furniture and footwear industries.
TPU Adhesives Films
Based on Thermoplastic Polyurethane technology, a TPU family supplied in
pellet form, has been created specifically to produce TPU Adhesive films.
These TPUs allow different bonding temperatures,
and can be applied by either flat extrusion or blow extrusion process.
The TPU adhesive film, produced with TPU, presents the following
advantages:
Solvent-Based TPU Adhesives
These are formulated from linear crystalline TPU polymers in pellet form
and are easily dissolved in a wide range of solvents. The selection of the solvents
is often determined by the regulations of each country, and by the final physical
characteristics of the desired adhesives.
A crosslinking agent (isocyanate) can be added to the original adhesive solution
when the adhesive is applied by the end-user. Such systems can be used during a
short pot-life of a few hours.
The following benefits must be presented by solvent based Thermoplastic Polyurethane Adhesives:
-
High green strength at low activation temperature
-
Easy heat activation
- Good heat resistance
- High final bonding strength
