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POM UV25Z 抗紫外线,韧性良好

添加时间:2013-06-04  信息来源:http://www.simibc.com/  作者:苏州希普能塑料
泰科纳POM UV25Z
 
CELCON® UV25Z CD3068 BLACK
CELCON® UV25Z CF2001 NATURAL
 
CELCON UV25Z | POM | UV Resistant
 
Description
Celcon® UV25Z is a nominal 2.5 melt flow rate acetal copolymer which has been specially stabilized to prevent discoloration and deterioration of mechanical properties from ultraviolet light exposure. The material is available in precolored black or colors.
 
Other Processing
Injection Molding
Standard reciprocating screw injection molding machines with a high compression screw (minimum 3:1 and preferably 4:1) and low back pressure (0.35 Mpa/50 PSI) are favored. Using a low compression screw (I.E. general purpose 2:1 compression ratio) can result in unmelted particles and poor melt homogeneity. Using a high back pressure to make up for a low compression ratio may lead to excessive shear heating and deterioration of the material.
 
Melt Temperature: Preferred range 182-199℃ (360-390℉). Melt temperature should never exceed 230℃ (450℉).
 
Mold Surface Temperature: Preferred range 82-93℃ (180-200℉) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120℃ (250℉) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65℃/150℉) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25℃ (80℉). In general, mold surface temperatures lower than 82℃ (180℉) may hinder weld line formation and produce a hazy surface or a surface with flow lines, pits and other included defects that can hinder part performance.
 
ISO Data Mechanical properties Value Unit Test Standard
Phys Density 1410 kg/m³ ISO 1183
Melt volume rate (MVR) 2.2 cm³/10min ISO 1133
MVR test temperature 190 ISO 1133
MVR test load 2.16 kg ISO 1133
Mold shrinkage - parallel 2.2 % ISO 294-4
Mold shrinkage - normal 1.7 % ISO 294-4
Water absorption (23℃-sat) 0.75 % ISO 62
Humidity absorption (23℃/50%RH) 0.2 % ISO 62
Mech Mechanical properties Value Unit Test Standard
Tensile modulus (1mm/min) 2500 MPa ISO 527-2/1A
Tensile stress at yield (50mm/min) 63 MPa ISO 527-2/1A
Tensile strain at yield (50mm/min) 11 % ISO 527-2/1A
Flexural modulus (23℃) 2420 MPa ISO 178
Charpy notched impact strength @ 23℃ 8 kJ/m² ISO 179/1eA
Notched impact strength (Izod) @ 23℃ 7 kJ/m² ISO 180/1A
Therm Thermal properties Value Unit Test Standard
Melting temperature (10℃/min) 166 ISO 11357-1,-2,-3
DTUL @ 1.8 MPa 90 ISO 75-1/-2
Coeff.of linear therm. expansion (parallel) 1.1 E-4/℃ ISO 11359-2
Coeff.of linear therm. expansion (normal) 1.1 E-4/℃ ISO 11359-2
SpecProd Test specimen production Value Unit Test Standard
Processing conditions acc. ISO 9988-2 - Internal
 
Processing
Pre Drying
Drying is not normally required. If material has come in contact with moisture through improper storage or handling or through regrind use, drying may be necessary to prevent splay and odor problems.
 
Drying time (h):3
Drying temperature (℃):80 - 100
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