Expander is a new special additive. It also named microsphere foaming agent . it is a kind of core-shell
structure.The shell is a thermoplastic acrylic resin polymer and the core is a spherical plastic particle
composed of alkanegases.The diameter is generally 10-45 microns. After heating, the volume can
rapidly expand to tens of timesthan its own,thus achieving the effect of foaming. The foaming
temperature ranges from 75 -260 C.
Appearance: white powder
Particle size 5-30um
Initial foaming temperature (c) 70-180
Maximum foaming temperature (c) 185-195
1. 1.Good thermal mechanical properties.
2.Excellent elasticity: Thermoplastic shell has excellent pressure resistance, the surface can withstand
300 kg/square centimeter pressure, good resilience can withstand repeated cyclic pressure/pressure
relief without rupture.
3. Excellent foaming performance: can achieve the original 20-70 times of independent foaming effect,
foaming is stilla complete closed body, with the traditional chemical foaming agent can not match the
4. Environmental protection performance: Polymer microspheres are non-toxic and pollution- free,
and can be used as environmentally friendly foaming agent in high-end products and high value-added
Expandable microcapsule Mainly used in thermoplastic elastic foamed soles, such as TPU/TPE
(SEBS/SBS)/TPR.Waterborne paint, waterborne printing pulp, waterborne wallp, etc.
Applied to PVC air-blown slippers, it has the following advantages: small addition, can give PVC
air-blown slippers ultra-light weight, small density, make the product foam fine and uniform, the product
after stereotyping skin smooth and bright color, bright, non-matte effect (better than other types of
expanders),soft, comfortable,small shrinkage.
Easy to use, adding in the formula, mixing and stirring evenly, control the temperature can be good,
do notneed to adjust the original process, the amount of addition according to the industry and the
effect achievedis generally 0.5-1.5%.