PVC Power Wire/Cable Compound Manufacturers

How does PVC power cable material perform in different environments (such as high temperature, low temperature or humid environment)?

The performance of PVC power cable materials in different environments can significantly affect its service life and performance. The following is an analysis of its performance in high temperature, low temperature and humid environments:

Performance in high temperature environment:
PVC cable materials are prone to thermal aging at high temperatures, that is, the molecular structure of the material will gradually decompose, causing the insulation performance of the cable to decrease and become fragile. This may result in a shortened cable life or a safety hazard.
In order to enhance the high-temperature performance of PVC cable materials, heat stabilizers, such as metal salt heat stabilizers, are usually added to delay thermal decomposition and ensure the service life of the cable in high-temperature environments.

Performance in low temperature environment:
PVC becomes brittle at low temperatures, reduces its flexibility and ductility, and is susceptible to cracking, especially if the cable needs to be bent or stretched.
For low-temperature environments, plasticizers (such as phthalates) can be added during production to improve the flexibility of PVC cable materials, so that they can maintain good mechanical properties at low temperatures and avoid embrittlement.

Performance in humid environments:
In humid environments, PVC cable materials show good water resistance, but long-term moisture exposure may still cause corrosion or aging of the cable surface, especially in humid environments with chemical pollution.
For cables that are exposed to moisture for a long time, waterproofing agents or antifungal agents are usually added to the PVC formula to enhance its ability to resist moisture and mold, ensuring the safety and longevity of the cable.

When producing PVC cable materials, how to choose the appropriate plasticizer to meet different flexibility requirements?

When producing PVC cable materials, the choice of plasticizer directly affects its flexibility and performance, so it is necessary to choose the appropriate plasticizer according to different usage environments and application scenarios. The following are the key factors to consider when choosing plasticizers:

1. Flexibility requirements
High flexibility requirements: If the PVC cable material requires high flexibility (such as for cables that need to be bent frequently), phthalate plasticizers such as DOP (dioctyl phthalate) or DINP (diisononyl phthalate) are usually selected. These plasticizers can significantly reduce the glass transition temperature of PVC and provide good flexibility and elasticity.
Medium flexibility requirements: If moderate flexibility is required, non-phthalate plasticizers such as DOTP (dioctyl terephthalate) can usually be selected, which provides good flexibility while having better environmental performance.

2. Environmental requirements
High temperature environment: In high temperature applications, it is necessary to select plasticizers with better thermal stability, such as phosphate plasticizers or citrate plasticizers. These plasticizers are not easy to decompose at high temperatures and can maintain the flexibility of the material.
Low temperature environment: In low temperature environments, the low temperature performance of plasticizers is crucial. Selecting plasticizers with excellent low temperature performance, such as DOA (dioctyl sebacate) or DOS (diisooctyl sebacate), can prevent PVC from becoming brittle at low temperatures.

3. Electrical performance requirements
In the production of cable materials, the electrical properties of plasticizers must meet the requirements to avoid degradation of electrical properties. Commonly used plasticizers with good electrical properties include trimellitic acid esters and phosphate plasticizers, which do not affect the insulation properties of PVC while maintaining flexibility.

4. Environmental and safety requirements
With the increasingly stringent environmental regulations (such as RoHS, REACH), phthalate-free plasticizers are required in some special applications. Such as ATBC (tributyl citrate) and DINCH (cyclohexane dicarboxylate), these plasticizers not only have good flexibility, but also meet the requirements of environmental protection and low toxicity, and are widely used in cable products that are more exposed to the human body, such as medical cables.

5. Durability requirements
The selection of plasticizers should also consider aging resistance and volatility. If you need to improve the durability of cable materials, you can choose high molecular weight plasticizers, such as TOTM (trioctyl trimellitate), which has low volatility and excellent heat and chemical resistance, and is suitable for the production of long-life cables.