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Celcon® GC25T
乙缩醛（POM）共聚物
Ticona
产品说明
Celcon® GC25T is a 25% glass fiber coupled acetal copolymer grade. It offers higher strength than the standard Celcon GC25-A. Celcon GC25T is FDA approved.
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
填料/增强材料 • 玻璃纤维增强材料, 25% 填料按重量
性能特点 • 高强度 • 共聚物 • 化学耦合
机构评级 • FDA 未评级
RoHS 合规性 • 联系制造商
形式 • 颗粒料
加工方法 • 挤出 • 型材挤出成型 • 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
-- 1.58g/cm³ ASTM D792
-- 1.57g/cm³ ISO 1183
收缩率
流动 0.40% ASTM D955
横向流动 1.0% ASTM D955
横向流量 0.80% ISO 294-4
流量 0.40% ISO 294-4
吸水率 ISO 62
饱和, 23°C 0.80%
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 8630MPa ISO 527-2/1A/1
抗张强度
断裂, 23°C 138MPa ASTM D638
断裂 129MPa ISO 527-2/1A/5
拉伸应变 (断裂) 3.0% ISO 527-2/1A/5
弯曲模量
23°C 8270MPa ASTM D790
23°C 8520MPa ISO 178
弯曲强度 (23°C) 202MPa 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 ISO 179/1eA
-30°C 7.2kJ/m²
23°C 8.7kJ/m²
简支梁缺口冲击强度 ISO 179/1eU
-30°C 55kJ/m²
23°C 50kJ/m²
悬壁梁缺口冲击强度
23°C 96J/m ASTM D256
23°C 8.0kJ/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 163°C ASTM D648
1.8 MPa, 未退火 161°C ISO 75-2/A
维卡软化温度 161°C ISO 306/B50
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Celcon® GC25T 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
熔融温度 2 165°C ISO 11357-3
线形膨胀系数 ISO 11359-2
流动 0.000027cm/cm/°C
横向 0.00013cm/cm/°C
注射 额定值单位制
加工（熔体）温度 182 到 199°C
模具温度 93.0 到 121°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 Celcon 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 93-121 C (200-250 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 3 mm (1/8 in.) may use a cooler (65 C/150 F) mold surface temperature and wall thickness over 6 mm (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 produce a hazy surface or a surface with flow lines, pits and other included defects.
挤出 额定值单位制
熔体温度 180 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.
备注
1 一般属性：这些不能被视为规格。
2 10°C/min
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