Which of the following is used in tyre cords ?

Options

A. Terylene
B. Polyethylene
C. Polypropylene
D. Bakelite

Explanation

To determine which material is used in tire cords, we will analyze the given options one by one.

### Step-by-Step Solution:

1. **Identify the Options**: The question asks which of the following materials is used in tire cords. The options provided are polypropylene, bakelite, polyethylene, and pterylene.

2. **Analyze Polypropylene**:
- Polypropylene is commonly used in the manufacturing of toys, pipes, and bottles.
- **Conclusion**: Polypropylene is not used in tire cords.

3. **Analyze Bakelite**:
- Bakelite is known for its insulating properties and is used in electrical goods, combs, and phonograph records.
- **Conclusion**: Bakelite is not used in tire cords.

4. **Analyze Polyethylene**:
- Polyethylene is a poor conductor of electricity and is primarily used as insulation for electrical wires and cables.
- **Conclusion**: Polyethylene is not used in tire cords.

5. **Analyze Pterylene**:
- Pterylene, also known as Dacron, is known for its crease-resistant and durable properties.
- It has low moisture content and is used in the manufacture of wash-and-wear fabrics, tire cords, and seat belts.
- **Conclusion**: Pterylene is indeed used in tire cords.

6. **Final Answer**: Based on the analysis, the correct answer is **Pterylene**.