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Celcon® M25
乙缩醛（POM）共聚物
Ticona
产品说明
Celcon® acetal copolymer grade M25 is a high molecular weight, higher toughness and impact resistance grade primarily used for extrusion and selected injection molding applications.
Chemical abbreviation according to ISO 1043-1: POM
Please also see Hostaform® C 2521.
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 • 高分子量 • 抗撞击性，高
• 共聚物 • 韧性良好
RoHS 合规性 • 联系制造商
形式 • 颗粒料
加工方法 • 薄膜挤出 • 片材挤出成型 • 注射成型
• 挤出 • 型材挤出成型
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
熔流率 2.5g/10 min ASTM D1238
溶化体积流率（MVR） (190°C/2.16 kg) 2.20cm³/10min ISO 1133
收缩率
流动 2.2% ASTM D955
横向流动 1.8% ASTM D955
横向流量 1.8% 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 2460MPa 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 63.0MPa ISO 527-2/1A/50
拉伸应变 (屈服) 12% ISO 527-2/1A/50
拉伸蠕变模量 ISO 899-1
1 hr 2100MPa
1000 hr 1100MPa
弯曲模量
23°C 2590MPa ASTM D790
71°C 1240MPa ASTM D790
104°C 689MPa ASTM D790
23°C 2430MPa 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) 9.1kJ/m² ISO 179/1eA
简支梁缺口冲击强度 ISO 179/1eU
-30°C 190kJ/m²
23°C, 局部断裂 250kJ/m²
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Celcon® M25 2012年10月14日
乙缩醛（POM）共聚物
Ticona
冲击性能 额定值单位制 测试方法
悬壁梁缺口冲击强度
-40°C 64J/m ASTM D256
23°C 80J/m ASTM D256
23°C 8.3kJ/m² ISO 180/1A
热性能 额定值单位制 测试方法
热变形温度
1.8 MPa, 未退火 110°C ASTM D648
1.8 MPa, 未退火 94.0°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
线形膨胀系数 ISO 11359-2
流动 0.00012cm/cm/°C
横向 0.00012cm/cm/°C
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
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.
挤出 额定值单位制
熔体温度 160 到 220°C
挤压说明
Standard extruders with a length to diameter ratio of at least 20:1 are recommended. The screw should be a high compression ratio of at least 3:1 and preferably 4:1 to assure good melting and uniform melt homogeneity. The design should be approximately 35% each for the feed and metering sections with the remaining 30% as transition zone.
Film Extrusion Melt temperature: 160 to 220°C (320 to 430°F) Other Extrusion Melt temperature 180 to 220°C (355 to 430°F) Profile Extrusion Melt temperature: 180 to 220°C (360 to 430°F) Sheet Extrusion Melt temperature: 180 to 190°C (355 to 375°F)
备注
1 一般属性：这些不能被视为规格。
2 10°C/min
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