Celcon® MR25B
乙缩醛（POM）共聚物
Ticona

产品说明

Celcon® MR25B is a specialty media resistant grade developed for improved bleach resistance and improved toughness.

Preliminary Data Sheet  
总体  
材料状态 • 已商用：当前有效 
供货地区 • 北美洲 • 欧洲
性能特点 • 韧性良好 
RoHS 合规性 • 联系制造商 
形式 • 颗粒料 
加工方法 • 型材挤出成型 • 注射成型

物理性能 额定值 单位制 测试方法
密度 1.41g/cm³ ISO 1183
溶化体积流率（MVR） (190°C/2.16 kg) 2.10cm³/10min ISO 1133
机械性能 额定值 单位制 测试方法
拉伸模量 2600MPa ISO 527-2/1A/1
拉伸应力 (屈服) 63.0MPa ISO 527-2/1A/50
拉伸应变 (屈服) 10% ISO 527-2/1A/50
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) 7.5kJ/m² ISO 179/1eA
热性能 额定值 单位制 测试方法
热变形温度 (1.8 MPa, 未退火) 101°C ISO 75-2/A
熔融温度 2 166°C ISO 11357-3
  
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