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Celcon® M270™
乙缩醛（POM）共聚物
Ticona
产品说明
Celcon® acetal copolymer grade M270™ is a lower molecular weight, high - flow grade designed for superior moldability in multi-cavity, intricate or hard to fill molds applications.
Chemical abbreviation according to ISO 1043-1: POM
Please also see Hostaform® C 27021.
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 • 低分子量 • 良好的成型性能
• 共聚物 • 流动性高
RoHS 合规性 • 联系制造商
形式 • 颗粒料
加工方法 • 注射成型
多点数据 • Isothermal Stress vs. Strain (ISO 11403-1)
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) 23.0cm³/10min ISO 1133
收缩率
流动 2.2% ASTM D955
横向流动 1.8% ASTM D955
横向流量 1.6% ISO 294-4
流量 1.7% 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 2800MPa ISO 527-2/1A/1
抗张强度
屈服, 23°C 60.7MPa ASTM D638
屈服 67.0MPa ISO 527-2/1A/50
拉伸应变 (屈服) 8.0% ISO 527-2/1A/50
拉伸蠕变模量 ISO 899-1
1 hr 2300MPa
1000 hr 1300MPa
弯曲模量
23°C 2590MPa ASTM D790
23°C 2750MPa 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) 5.2kJ/m² ISO 179/1eA
简支梁缺口冲击强度 ISO 179/1eU
-30°C 110kJ/m²
23°C 120kJ/m²
悬壁梁缺口冲击强度
23°C 53J/m ASTM D256
23°C 5.4kJ/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
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Celcon® M270™ 2012年10月14日
乙缩醛（POM）共聚物
Ticona
热性能 额定值单位制 测试方法
维卡软化温度 161°C ISO 306/B50
熔融温度 2 166°C ISO 11357-3
线形膨胀系数 ISO 11359-2
流动 0.00011cm/cm/°C
横向 0.00012cm/cm/°C
充模分析 额定值单位制 测试方法
熔体密度 1.20g/cm³ Internal Method
熔体比热 2210J/kg/°C ASTM C351
熔体导热性 0.16W/m/K Internal Method
顶出温度 165°C
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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