Celcon® M450
乙缩醛（POM）共聚物
Ticona

产品说明

Celcon® acetal copolymer grade M450 is an extremely low viscosity grade for optimal cycle performance in very thin walls or long, narrow flow paths in injection molding.

Chemical abbreviation according to ISO 1043-1: POM    
总体     
材料状态 • 已商用：当前有效    
供货地区 • 北美洲 • 拉丁美洲  • 南美洲 
性能特点 • 低粘度 • 共聚物  • 生产阶段，快 
用途 • 薄壁部件    
RoHS 合规性 • 联系制造商    
形式 • 颗粒料    
加工方法 • 注射成型    
树脂ID (ISO 1043) • POM    
     
物理性能  额定值单位制  测试方法 
比重  1.41g/cm³  ASTM D792 
    ISO 1183 
     
溶化体积流率（MVR） (190°C/2.16 kg)  39.0cm³/10min ISO 1133 
收缩率     
流动  2.2%  ASTM D955 
横向流动  1.8%  ASTM D955 
横向流量  2.0%  ISO 294-4 
流量  2.2%  ISO 294-4 
吸水率    ISO 62 
饱和, 23°C  0.75%   
平衡, 23°C, 50% RH  0.20%   
机械性能  额定值单位制  测试方法 
拉伸模量  2900MPa  ISO 527-2/1A/1 
抗张强度     
屈服, -40°C  94.5MPa  ASTM D638 
屈服, 23°C  60.7MPa  ASTM D638 
屈服, 71°C  34.5MPa  ASTM D638 
屈服  66.0MPa  ISO 527-2/1A/50 
拉伸应变 (屈服)  7.5%  ISO 527-2/1A/50 
弯曲模量     
23°C  2590MPa  ASTM D790 
23°C  2800MPa  ISO 178 
冲击性能  额定值单位制  测试方法 
简支梁缺口冲击强度 (23°C)  4.4kJ/m²  ISO 179/1eA 
悬壁梁缺口冲击强度     
23°C  48J/m  ASTM D256 
23°C  4.7kJ/m²  ISO 180/1A 
热性能  额定值单位制  测试方法 
热变形温度     
0.45 MPa, 未退火  156°C  ISO 75-2/B 
1.8 MPa, 未退火  110°C  ASTM D648 
1.8 MPa, 未退火  103°C  ISO 75-2/A 
维卡软化温度  161°C  ISO 306/B50 
熔融温度     
-- 2  166°C  ISO 11357-3 
--  165°C  ASTM D3418 
电气性能  额定值单位制  测试方法 
体积电阻率  1.0E+14ohm•cm ASTM D257 
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Celcon® M450 2012年10月14日
乙缩醛（POM）共聚物 
Ticona 
注射 额定值单位制
加工（熔体）温度 182 到 199°C
模具温度 82.0 到 93.0°C
注射说明 

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 C (360-390 F). Melt temperature should never exceed 230 C (450 F).

Mold Surface Temperature: Preferred range 82-93 C (180-200 F) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120 C (250 F) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65 C/150 F) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25 C (80 F). In general, mold surface temperatures lower than 82 C (180 F) 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.

备注
1 一般属性：这些不能被视为规格。

2 10°C/min

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