Medical PET (Polyethylene Terephthalate) heat shrink tubing is a specialized polymer material widely used in the medical device industry. This tubing is designed to provide insulation, protection, and strain relief for various medical applications, ensuring the safety and reliability of medical devices.
Key Features
High Shrink Ratio: PET heat shrink tubing can achieve a shrink ratio ranging from 1.15:1 to 3:1, allowing it to fit snugly over components of varying sizes. This adaptability is crucial for ensuring a secure fit on medical devices.
Thin Wall Design: The tubing is known for its ultra-thin walls, which do not significantly add to the profile of the device. This feature is particularly important in applications where space is limited.
Electrical Insulation: PET heat shrink tubing offers excellent electrical insulation properties, enhancing the electrical safety of medical devices. This is vital in preventing electrical failures and ensuring patient safety.
Durability and Resilience: The material is durable against bending and has high resilience, making it suitable for various medical applications where flexibility and strength are required.
| PET Shrink Tube Technical Parameters |
| 项目(Item) | 单位（unit） | 测试方法(Test Methods)/ 测量工具(Test Tool) | 结果（Result） |
| 规格尺寸（specification and dimension） | 内径（inner diameter） | mm | 塞规(Plug Gauge) | 3 - 25 |
| 壁厚（Wall Thickness） | mm | 数显千分尺(Digimatic Micrometer) | 0.045 - 0.125 |
| 长度（Length ） | mm | 卡尺(caliper)/钢尺(steel rule) | 可定制切割(Customizable cutting) |
| 颜色（Colors） | / | 目视(visual) | 可定制颜色(Customizable colors) |
| 形状（shape） | / | 目视(visual) | 压扁后撑圆(Flatten and round) |
| 热特性（Thermal properties） | 收缩率（Shrinkage/Sizing） | % | 水浴锅(laboratory water bath) | 横向(lateral)：48±4
纵向(longitudinal)：8±3%（常规usual） |
| 熔点（Melting point） | ℃ | DSC | Tm≥220 |
| 长期使用温度（Long-term use Temperature Range） | ℃ | 烘箱(Oven) | -25—120 |
| 短期使用温度（Short-term use Temperature） | ℃ | 烘箱(Oven) | ＜200 |
| 收缩温度（Shrinking temperature） | ℃ | 热缩炉(Shrink furnace) | 70–190 |
| 机械特性（Mechanical properties） | 拉伸强度（Tensile strength） | MPa | ASTM D638 | ≥30 |
| 断裂伸长率（Elongation at break） | % | ASTM D638 | ≥200 |
| 电气特性（Electrical properties） | 表面电阻率（Surface resistivity） | Ω.cm | GB/T 1410 | ≥1×109 |
| 体积电阻率（Volume resistivity） | Ω.cm | GB/T 1410 | ≥1×1014 |
| 生物相容性（Biocompatibility) | / | ISO 10993 | 通过ISO 10993细胞毒性测试皮肤致敏测试皮内刺激测试急毒性和急热源性检测(Passed the ISO 10993 cytotoxicity test, skin sensitization test, intradermal irritation test, acute toxicity and acute heat source test) |
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