elcon® GC25A
乙缩醛（POM）共聚物
Ticona

产品说明

Celcon® acetal copolymer grade GC25A is a glass coupled formulation containing 25% reinforced fiber glass. This grade offers excellent strength, stiffness and heat distortion temperature with lower mold shrinkage, minimum thermal expansion, excellent dimensional stability and good moldability.

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  
 • 尺寸稳定性良好 • 化学耦合 • 收缩性低 
性能特点 • 刚性，良好 • 良好的成型性能  
 • 共聚物 • 良好的强度  
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 • Isochronous Stress vs. Strain • Isothermal Stress vs. Strain 
 (ISO 11403-1) (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 
   ISO 1183 
    
收缩率    
流动  0.40% ASTM D955 
横向流动  1.4% ASTM D955 
横向流量  1.2% 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  8600MPa ISO 527-2/1A/1 
抗张强度    
断裂, -40°C  159MPa ASTM D638 
断裂, 23°C  110MPa ASTM D638 
断裂, 71°C  68.9MPa ASTM D638 
断裂  106MPa ISO 527-2/1A/5 
拉伸应变 (断裂)  2.0% ISO 527-2/1A/5 
弯曲模量    
23°C  7580MPa ASTM D790 
71°C  4830MPa ASTM D790 
104°C  3450MPa ASTM D790 
23°C  8700MPa ISO 178 
弯曲强度 (23°C)  160MPa 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)  6.4kJ/m² ISO 179/1eA 
简支梁缺口冲击强度   ISO 179/1eU 
-30°C  35kJ/m²  
23°C  25kJ/m²  
悬壁梁缺口冲击强度    
-40°C  37J/m ASTM D256 
23°C  59J/m ASTM D256 
82°C  48J/m ASTM D256 
23°C  6.0kJ/m² ISO 180/1A 
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Celcon® GC25A  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
热变形温度  
1.8 MPa, 未退火 163°C ASTM D648
1.8 MPa, 未退火 160°C ISO 75-2/A
维卡软化温度 161°C ISO 306/B50
熔融温度  
-- 2 165°C ISO 11357-3
-- 166°C ASTM D3418
线形膨胀系数  ISO 11359-2
流动 0.000025cm/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 1.4E+14ohm•cm ASTM D257
  
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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