Product Details

Specification:

Item		Test Method	Value	Unit
Basic property	Density	ASTM D792	1.24	g/cm3
	Moisture Absorption	ASTM D570	0.30	%
	MFR	ASTM D1238	6.5	g/10min
	Mold Shrinkage	ASTM D955	0.007	%
Mechanical property	Tensile strength	ASTM D638	70.3	MPa
	Tensile Modulus	ASTM D638	2480	MPa
	Bending strength	ASTM D790	106.2	MPa
	Flexural modulus	ASTM D790	2690	MPa
	Tensile yield strength	ASTM D1822	420	KJ/m2
	IZOD notch impact strength	ASTM D256	6.9	KJ/m2
Thermal property	Heat deflection temperature	ASTM D648	174
Thermal property	Expansion coefficient	ASTM D696	56

Application:

PSU is a crystalline polymer, no obvious melting point, T G is 190 ℃, the molding temperature above 280 ℃.Products are transparent.(2) the PSU molding characteristics similar to the PC.The melt flow characteristics close to the Newtonian fluid, the polymer melt viscosity is very sensitive to temperature.When the melt temperature over 330 ℃, improve every 30 ℃, which is 50% lower melt viscosity.(3) although the PSU in the melt viscosity is sensitive to temperature, its viscosity is very high, still less liquid in the process of forming;In addition, the cooling speed of melt faster, molecular chain and rigid, therefore, in the shape of internal stress.(4) obviously, PSU in the molecular structure of hair without hydrophilic group, small water imbibition, balance water imbibition is 0.6%, but in the process of forming, the existence of trace moisture will melt the degradation caused by high temperature and strong mechanical force.Before the injection, therefore, must be dry.