Hytrel® 4069

Common features of Hytrel® thermoplastic polyester elastomer include mechanical and physical properties such as exceptional toughness and resilience, high resistance to creep, impact and flex fatigue, flexibility at low temperatures and good retention of properties at elevated temperatures. In addition, it resists many industrial chemicals, oils and solvents. Special grades include heat stabilised, flame retardant, food contact compliant, blow molding and extrusion grades. Concentrates offered include black pigments, UV protection additives, heat stabilisers, and flame retardants.

Hytrel® thermoplastic polyester elastomer is plasticiser free.

The good melt stability of Hytrel® thermoplastic polyester elastomer normally enables the recycling of properly handled production waste. If recycling is not possible, we recommend, as the preferred option, incineration with energy recovery (-24 kJ/g of base polymer) in appropriately equipped installations.

For disposal, local regulations have to be observed.

Hytrel® thermoplastic polyester elastomer typically is used in demanding applications in the automotive, fluid power, electrical/electronic, consumer goods, appliance and power tool, sporting goods, furniture, industrial and off-road transportation/equipment industry.

Hytrel® 4069 is a low modulus grade with nominal hardness of 40D. It contains non-discoloring stabilizer. It can be processed by many conventional thermoplastic processing techniques like injection molding and extrusion.

热塑性聚酯弹性体 (TPC-ET) Hytrel® 4069 热成型与涂层应用指南

一、材料基础特性

二、热成型工艺详解

1. 预加工准备

• 干燥处理：必须使用除湿干燥机，100-110°C，2-3 小时，确保含水率 **<0.1%**，防止水解降解
• 片材制备：先通过挤出工艺生产片材，挤出温度 220-250°C，模温 < 45°C
• 再生料使用：添加量不超过 25%，且必须重新除湿烘干

2. 热成型核心参数

3. 热成型关键要点

• 加热均匀性：采用红外加热或热风循环，避免局部过热
• 拉伸比： 推荐拉伸比为 2:1，低硬度特性使其适合复杂形状
• 后处理：成型后可进行热处理 (80-100°C，10-30 分钟) 消除内应力
• 废料回收率：可达 95% 以上，可循环利用

三、涂层应用技术

1. 挤出涂层工艺 (Extrusion Coating)