POM WR140LG,抗紫外线，低光泽，耐候性
POM WR140LG材料说明：Hostaform®共聚级wr140lg黑色是一种特殊的耐候级缩醛共聚物的制定提供良好的流动和低光泽和紫外线稳定性汽车外部应用程序所必需的。 中嘉塑胶原料有限公司，供应原料，品质真实,物实价廉。PA6T,46,9T、PC、PC/ABS、PBT、ABS、PPA、PPS、POM、PMMA、TPE、PPO、LCP液晶聚合物。
POM WR140LG的物性表：
| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Density | 1.33 g/cc | 0.0480 lb/in³ | ISO 1183 | ||
| Linear Mold Shrinkage, Flow | 0.016 cm/cm | 0.016 in/in | ISO 294-4 | ||
| Linear Mold Shrinkage, Transverse | 0.015 cm/cm | 0.015 in/in | ISO 294-4 | ||
| Melt Flow | 13 g/10min @Load 2.16 kg, Temperature 190 °C | 13 g/10min @Load 4.76 lb, Temperature 374 °F | (MVR) cm³/10min;ISO 1133 | ||
| Mechanical Properties | Metric | English | Comments | ||
| Tensile Strength, Yield | 41.0 MPa | 5950 psi | 50mm/min; ISO527-2/1A | ||
| Elongation at Yield | 10 % | 10 % | 50mm/min; ISO527-2/1A | ||
| Tensile Modulus | 1.80 GPa | 261 ksi | 1mm/min; ISO527-2/1A | ||
| Flexural Modulus | 1.85 GPa | 268 ksi | ISO 178 | ||
| Charpy Impact, Notched | 0.360 J/cm² | 1.71 ft-lb/in² | ISO 179/1eA | ||
| 0.360 J/cm² @Temperature -30.0 °C | 1.71 ft-lb/in² @Temperature -22.0 °F | ISO 179/1eA | |||
| Thermal Properties | Metric | English | Comments | ||
| CTE, linear | 130 µm/m-°C | 72.2 µin/in-°F | ISO 11359-2 | ||
| CTE, linear, Transverse to Flow | 130 µm/m-°C | 72.2 µin/in-°F | ISO 11359-2 | ||
| Melting Point | 165 °C | 329 °F | 10°C/min; ISO11357-1,-2,-3 | ||
| Deflection Temperature at 1.8 MPa (264 psi) | 80.0 °C | 176 °F | ISO 75-1, -2 | ||
| Processing Properties | Metric | English | Comments | ||
| Processing Temperature | 80.0 - 105 °C | 176 - 221 °F | Cavitytemperature | ||
| Zone 1 | 170 - 175 °C | 338 - 347 °F | |||
| Zone 2 | 170 - 180 °C | 338 - 356 °F | |||
| Zone 3 | 175 - 185 °C | 347 - 365 °F | |||
| Zone 4 | 180 - 190 °C | 356 - 374 °F | |||
| Die Temperature | 185 - 195 °C | 365 - 383 °F | |||
| Melt Temperature | 180 - 195 °C | 356 - 383 °F | |||
| Mold Temperature | 82.2 - 93.3 °C | 180 - 200 °F | generallypreferred range, may vary with thickness | ||
| Drying Temperature | 100 - 105 °C | 212 - 221 °F | |||
| Dry Time | 3.00 hour | 3.00 hour | |||
| Injection Pressure | 60.0 - 120 MPa | 8700 - 17400 psi | |||
| Hold Pressure | 60.0 - 120 MPa | 8700 - 17400 psi | |||
| Back Pressure | 0.500 MPa | 72.5 psi | |||
| Hot-Working Temperature | 180 - 200 °C | 356 - 392 °F | |||
| Descriptive Properties | |||||
| Injection molding | Yes | ||||
| Injection speed | slow | ||||
| Pre-drying | Predrying isrequired before processing to ensure a low gloss finish. | ||||
| Processing conditions | ISO 9988-2 | ||||
HOSTAFORM®WR140LG CD34682 BLACK
HOSTAFORMWR140LG | POM | UV Resistant
Description
Hostaform®acetal copolymer grade WR140LG Black is a specialty weatherablegrade of acetal copolymer formulated to provide good flow with alow gloss finish and a UV stability necessary for exteriorautomotive applications.
OtherProcessing
InjectionMolding
Standardreciprocating screw injection molding machines with a highcompression screw (minimum 3:1 and preferably 4:1) and low backpressure (0.35 Mpa/50 PSI) are favored. Using a low compressionscrew (I.E. general purpose 2:1 compression ratio) can result inunmelted particles and poor melt homogeneity. Using a high backpressure to make up for a low compression ratio may lead toexcessive shear heating and deterioration of thematerial.
MeltTemperature: Preferred range 182-199℃ (360-390℉).Melt temperature should never exceed 230℃ (450℉).MoldSurface Temperature: Preferred range 82-93℃ (180-200℉)especially with wall thickness less than 1.5 mm (0.060 in.). Mayrequire 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.) mayuse a cold mold surface down to 25℃ (80℉).In general, mold surface temperatures lower than82℃ (180℉)may hinder weld line formation and produce a hazy surface or asurface with flow lines, pits and other included defects that canhinder part performance.
ISOData | Mechanicalproperties | Value | Unit | TestStandard |
Phys | Density | 1330 | kg/m³ | ISO1183 |
Meltvolume rate (MVR) | 13 | cm³/10min | ISO1133 | |
MVRtest temperature | 190 | ℃ | ||
MVRtest load | 2.16 | kg | ||
Moldshrinkage - parallel | 1.6 | % | ISO294-4 | |
Moldshrinkage - normal | 1.5 | |||
Mech | Mechanicalproperties | Value | Unit | TestStandard |
Tensilemodulus (1mm/min) | 1800 | MPa | ISO527-2/1A | |
Tensilestress at yield (50mm/min) | 41 | |||
Tensilestrain at yield (50mm/min) | 10 | |||
Flexuralmodulus (23℃) | 1850 | ISO178 | ||
Charpynotched impact strength @ 23℃ | 3.6 | kJ/m² | ISO179/1eA | |
Charpynotched impact strength @ -30℃ | ||||
Therm | Thermalproperties | |||
Meltingtemperature (10℃/min) | 165 | ISO11357-1,-2,-3 | ||
DTUL@ 1.8 MPa | 80 | ISO75-1/-2 | ||
Coeff.oflinear therm. expansion (parallel) | 1.3 | E-4/℃ | ISO11359-2 | |
Coeff.oflinear therm. expansion (normal) | ||||
SpecProd | Testspecimen production | |||
Processingconditions acc. ISO | 9988-2 | - | Internal |
Processing
PreDrying
Predryingis required before processing to ensure a low gloss finish. Useslow injection speed until material passes through gate, thenincrease.
Dryingtime (h)：3
Dryingtemperature (℃)：105- 110