Texin® 255
TPU(热塑性聚氨酯)
科思创 (原拜耳)(Covestro)
产品描述
Texin 255 resin is a polyester-based thermoplastic polyurethane with a Shore hardness of approximately 55D. It can be processed by injection molding;extrusion processes are not recommended.
Texin 255 natural color resin complies with FDA food-contact regulations 21 CFR 177.1680 (Polyurethane Resins) and 177.2600 (Rubber Articles Intended for Repeated Use), for use in articles that contact food except articles used for packing or holding food during cooking, subject to the limitations of these and any other applicable regulations.
Texin 255 resin offers excellent fuel and oil resistance, as well as outstanding abrasion resistance, impact strength, toughness, and flexibility. Typical applications include toplifts, seals, gaskets, sleeves, casters, and gears. As with any product, use of Texin 255 resin in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.
基本信息
| 原厂资料 | 物性表(英文) | |||
| 产品特性 | 高冲击高韧性耐磨食品接触级耐燃油耐油 | |||
| 法规认证 | FDA(食品药品监督管理局) | |||
| 成型方式 | 注塑挤出 | |||
技术参数
| 物理性能 | 值/单位 | 测试标准 | 测试条件 |
|---|---|---|---|
比重 | 1.21 - | ASTM D792 | |
收缩率 | |||
纵向(Flow) | 0.8 % | ASTM D 955 | 2.54 mm |
横向(Across Flow) | 0.8 % | ASTM D 955 | 2.54 mm |
磨耗 | 50 mg/1000cy | ASTM D 3489 | H-18, 1,000-g Load |
| 机械性能 | 值/单位 | 测试标准 | 测试条件 |
拉伸强度 | |||
50%延伸率时 | 12.4 Mpa | ASTM D 412 | |
100%延伸率时 | 15.9 Mpa | ASTM D 412 | |
300%延伸率时 | 32.4 Mpa | ASTM D 412 | |
- | 63.4 Mpa | ASTM D 412 | |
拉伸延伸率 | |||
断裂(brk) | 500 % | ASTM D 412 | |
弯曲模量 | 1207 Mpa | ASTM D790 | -22°F (-30°C) |
弯曲模量 | 62.1 Mpa | ASTM D790 | 158°F (70°C) |
弯曲模量 | 138 Mpa | ASTM D790 | 73°F (23°C) |
撕裂强度 | 157.6 kN/m | ASTM D 624 | Die C |
剪切强度 | 38.5 Mpa | ASTM D 732 | |
压缩永久形变 | 35 % | ASTM D 395 | 22 Hours at 158°F (70°C) |
压缩永久形变 | 50 % | ASTM D 395 | 22 Hours at 212°F (100°C) |
压缩永久形变 | 15 % | ASTM D 395 | 22 Hours at 73°F (23°C) |
压缩永久形变 | 65 % | ASTM D 395 | Postcured, 22 Hours at 158°F (70°C) |
压缩永久形变 | 75 % | ASTM D 395 | Postcured, 22 Hours at 212°F (100°C) |
压缩永久形变 | 20 % | ASTM D 395 | Postcured, 22 Hours at 73°F (23°C) |
抗压强度 | 7.4 Mpa | ASTM D 575 | 10% Deflection |
抗压强度 | 10.1 Mpa | ASTM D 575 | 15% Deflection |
抗压强度 | 1 Mpa | ASTM D 575 | 2% Deflection |
抗压强度 | 12.7 Mpa | ASTM D 575 | 20% Deflection |
抗压强度 | 15.5 Mpa | ASTM D 575 | 25% Deflection |
抗压强度 | 3.9 Mpa | ASTM D 575 | 5% Deflection |
抗压强度 | 40.6 Mpa | ASTM D 575 | 50% Deflection |
回弹性 | 40 % | ASTM D 2632 | Bayshore Resilience |
| 冲击性能 | 值/单位 | 测试标准 | 测试条件 |
仪器化落镖冲击能量 | |||
-30℃ (-22℉)总能量 | 50 J | ASTM D3763 | 2.54 mm |
23℃ (73℉)总能量 | 57.8 J | ASTM D3763 | 2.54 mm |
脆化温度 | -68 °C | ASTM D 746 | |
| 硬度性能 | 值/单位 | 测试标准 | 测试条件 |
邵氏硬度 D | 55 D | ASTM D 2240 | |
| 热学性能 | 值/单位 | 测试标准 | 测试条件 |
热变形温度(HDT) | |||
0.45 Mpa (66 psi)（4.6kg/cm²） | 59 °C | ASTM D648 | |
维卡软化温度(Vicat) | 168 °C | ASTM D1525 | Rate A |
线性膨胀系数(CLTE) | |||
- | 131 E-6 mm/mm/℃ | ASTM D 696 | |
玻璃化温度(Tg) | -26 °C | Internal | |
| 燃烧性能 | 值/单位 | 测试标准 | 测试条件 |
UL 防火等级 | |||
HB | 1.5 mm | UL94 |