东莞市广裕塑胶原料有限公司
美国科慕PTFE 669X 耐化学 高韧性 耐候 内衬 管材 带子
Teflon? PTFE 669 X
聚四氟乙烯
DuPont Fluoropolymers
产品说明：
DuPont ? Teflon ? PTFE 669 X is a polytetrafluoroethylene fine powder resin used primarily for paste extrusion. Teflon ? PTFE 669 X offers the excellent combination of properties typical of the Teflon ? fluoropolymer resins:
Teflon ? PTFE 669 X is designed for processing at very low to medium reduction ratios (10:1 to 500:1). It is particularly suitable for production of pipe liners and general tubing.
Teflon ? PTFE 669 X meets the requirements of ASTM D4895-91a, Type I, Grade 2, Class A.
Typical Applications
Teflon ? PTFE 669 X is mainly used for the production of pipe liners used in the chemical industry. It is also used for making tubing and unsintered tape for mechanical, chemical and electrical applications.
- non-aging characteristics;
- chemical inertness to nearly all industrial chemicals and solvents;
- exceptional dielectric properties, stable with frequency and temperature;
- toughness and flexibility;
- low coefficient of friction;
- non-stick characteristics;
- negligible moisture absorption;
- excellent weather resistance;
- service temperature up to 260°C (500°F);
- useful properties at -240 °C (-400 °F);
- moderate stiffness and high ultimate elongation.
Teflon ? PTFE 669 X is designed for processing at very low to medium reduction ratios (10:1 to 500:1). It is particularly suitable for production of pipe liners and general tubing.
Teflon ? PTFE 669 X meets the requirements of ASTM D4895-91a, Type I, Grade 2, Class A.
Typical Applications
Teflon ? PTFE 669 X is mainly used for the production of pipe liners used in the chemical industry. It is also used for making tubing and unsintered tape for mechanical, chemical and electrical applications.
DuPont ? Teflon ? PTFE 62 X is a polytetrafluoroethylene fine powder resin used primarily for paste extrusion. Teflon ? PTFE 62 X offers the excellent combination of properties typical of the Teflon ? fluoropolymer resins:
- non-aging characteristics;
- chemical inertness to nearly all industrial chemicals and solvents;
- exceptional dielectric properties, stable with frequency and temperature;
- toughness and flexibility;
- low coefficient of friction;
- non-stick characteristics;
- negligible moisture absorption;
- excellent weather resistance;
- service temperature up to 260°C (500°F);
- useful properties at -240°C (-400°F);
- moderate stiffness and high ultimate elongation.
Teflon? PTFE 669 X 物性表
| 基本信息 | |
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| 特性 |
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| 机构评级 |
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| 形式 |
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| 加工方法 |
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| 物理性能 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 比重 | 2.17 | g/cm3 | ISO 12086, ASTM D4895 |
| 表观密度 | 0.52 | g/cm3 | ASTM D4895, ISO 12086 |
| 平均颗粒尺寸 | |||
| -- | 450 | μm | ASTM D4895 |
| -- | 450 | μm | ISO 12086 |
| 补充信息 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| Extrusion Pressure - at RR = 100:1 | |||
| -- | 7.50 | MPa | ASTM D4895 |
| -- | 7.50 | MPa | ISO 12086 |
| 热性能 | 额定值 | 单位制 | 测试方法 |
|---|---|---|---|
| 熔融温度 | ASTM D4895, ISO 12086 | ||
| --1 | 326 | °C | ASTM D4895, ISO 12086 |
| --2 | 344 | °C | ASTM D4895, ISO 12086 |
PTFE:聚四氟乙烯（Teflon或PTFE），俗称“塑料王”，是由四氟乙烯经聚合而成的高分子化合物，具有优良的化学稳定性、耐腐蚀性、密封性、高润滑不粘性、电绝缘性和良好的抗老化耐力。用作工程塑料，可制成聚四氟乙烯管、棒、带、板、薄膜等。一般应用于性能要求较高的耐腐蚀的管道、容器、泵、阀以及制雷达、高频通讯器材、无线电器材等。
基本特点
耐高温——使用工作温度达250℃。
耐低温——具有良好的机械韧性；即使温度下降到-196℃，也可保持5%的伸长率。
耐腐蚀——对大多数化学药品和溶剂，表现出惰性、能耐强酸强碱、水和各种有机溶剂。
耐气候——有塑料中最佳的老化寿命。
高润滑——是固体材料中摩擦系数最低者。
不粘附——是固体材料中最小的表面张力，不粘附任何物质。聚四氟乙烯相对分子质量较大，低的为数十万，高的达一千万以上
聚四氟乙烯
聚四氟乙烯
，一般为数百万（聚合度在104数量级，而聚乙烯仅在103）。一般结晶度为90～95%，熔融温度为327～342℃。聚四氟乙烯分子中CF2单元按锯齿形状排列，由于氟原子半径较氢稍大，所以相邻的CF2单元不能完全按反式交叉取向，而是形成一个螺旋状的扭曲链，氟原子几乎覆盖了整个高分子链的表面。这种分子结构解释了聚四氟乙烯的各种性能。温度低于19℃时，形成13/6螺旋；在19℃发生相变，分子稍微解开，形成15/7螺旋。
虽然在全氟碳化合物中碳-碳键和碳-氟键的断裂需要分别吸收能量346.94和484.88kJ/mol，但聚四氟乙烯解聚生成1mol四氟乙烯仅需能量171.38kJ。所以在高温裂解时，聚四氟乙烯主要解聚为四氟乙烯。聚四氟乙烯在260、370和420℃时的失重速率（%）每小时分别为1×10-4．4×10-3和9×10-2。可见，聚四氟乙烯可在 260℃长期使用。由于高温裂解时还产生剧毒的副产物氟光气和全氟异丁烯等，所以要特别注意安全防护并防止聚四氟乙烯接触明火。
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