Introduction to custom polymer bearings

Key Characteristics of Custom Polymer Bearings
1. High and low temperature resistance: Can be used long-term at 200℃ and remains elastic at -60℃;
2. Excellent electrical insulation properties: Silicone rubber has excellent dielectric properties, especially at high temperatures, far exceeding those of general organic rubber. The dielectric strength is almost unaffected by temperature in the 20-200℃ range;
3. Excellent weather resistance, ozone resistance, and UV radiation resistance: Does not crack after long-term outdoor use. It is generally believed that silicone rubber can be used outdoors for more than 20 years;
4. Excellent high-temperature compression resistance;
5. Good processing performance and easy molding: Various products can be manufactured through extrusion hot air vulcanization molding, compression molding, and extension molding. Due to its excellent comprehensive performance and good technical and economic effects, rubber products have been widely used in aviation, aerospace, atomic energy, electrical appliances, electronics, instruments, automobiles, machinery, metallurgy, chemical industry, medical and health care, and daily life.

Injection Molding Considerations and Advantages of High Hardness for Custom Polymer Bearings
1. Are there any aspects to pay attention to during the injection molding process of custom polymer bearings to avoid problems?
Polyurethane products require attention to specific aspects during the injection molding process to avoid unnecessary problems or troubles. Therefore, the answer to this question is yes. Specifically, this includes having appropriate injection pressure and holding pressure. Other aspects may also be relevant.

2. Is the appearance of weld lines on custom polymer bearings good or bad? Also, what are black spots or burn marks?
If weld lines appear on custom polymer bearings, it will have negative effects, as it will affect the aesthetic appearance and strength of the polyurethane product. Black spots or burn marks refer to black spots or streaks on the product.

3. Why is it better to choose a higher hardness polyurethane?
This is because choosing a higher hardness polyurethane can avoid some problems and reduce the product defect rate. Polyurethane itself is quite prone to sticking to molds, which can lead to problems such as shrinkage or air bubbles. Furthermore, its stability is not very good. Therefore, the aforementioned measures are implemented to address these issues.

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