EASTAR BR003 Copolyester contains a mold release additive. It has excellent appearance and is nearly water-clear. Its most outstanding features are its chemical resistance and processing capabilities. Exposure to aromatic oils often causes crazing or actual fracture of many polymer resins, but BR003 maintains its physical properties when exposed to these oils, and its appearance is virtually unchanged. BR003 is specifically formulated to provide the optimal combination of chemical resistance, bristle retention, strength, stiffness, processability, clarity, colorability, and feel for toothbrushes. Under existing United States Food and Drug Administration(FDA) regulations, EASTAR BR003 copolyester may lawfully be used to make food contact articles which comply with the specifications and conditions of use in 21 CFR 177.1240. Migration tests on BR003 samples meet the compliance requirements of 21 CFR 177.1240(e)(1),(2) and (3).

Applications: Toothbrushes

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Information provided by Eastman Chemical.

物理性能	额定值 (公制)	额定值 (英制)	测试方法
密度	1.20 g/cc	0.0434 lb/in³	ASTM D792
线性成型收缩率,Flow	0.0040 cm/cm @Thickness 3.20 mm	0.0040 in/in @Thickness 0.126 in	ASTM D955

机械性能	额定值 (公制)	额定值 (英制)	测试方法
洛氏硬度（R 级）	103	103	ASTM D785
极限抗拉强度	46.0 MPa	6670 psi	ISO 527
	51.0 MPa	7400 psi	ASTM D638
抗张强度(屈服)	47.0 MPa	6820 psi	ASTM D638 and ISO 527
伸长率 (断裂)	200 %	200 %	ISO 527
屈服伸长率	4.0 %	4.0 %	ISO 527
拉伸模量	1.80 GPa	261 ksi	ISO 527
弯曲强度	65.0 MPa	9430 psi	ISO 178
	69.0 MPa	10000 psi	ASTM D790
弯曲模量	1.85 GPa	268 ksi	ISO 178
悬壁梁缺口冲击强度	0.800 J/cm	1.50 ft-lb/in	ASTM D256
	0.400 J/cm @Temperature -40.0 °C	0.749 ft-lb/in @Temperature -40.0 °F	ASTM D256

热性能	额定值 (公制)	额定值 (英制)	测试方法
载荷下热变形温度(0.46 MPa)	73.0 °C	163 °F	ASTM D648
载荷下热变形温度(1.8 MPa)	65.0 °C	149 °F	ASTM D648

光学性能	额定值 (公制)	额定值 (英制)	测试方法
雾度	0.30 %	0.30 %	ASTM D1003
Transmission, Visible	89 %	89 %	Regular transmittance per ASTM D 1003
	91 %	91 %	Total Transmittance; ASTM D 1003

加工性能	额定值 (公制)	额定值 (英制)	测试方法
加工（熔体）温度	255 °C	491 °F
模具温度	22.5 °C	72.5 °F
干燥温度	70.0 °C	158 °F