Question

1. Write the use of synthetic fibres in our daily life.
2. Explain why plastic containers are favoured for storing food.
3. What is PET? Mention its uses.
4. What is rayon? Highlight the uses of rayon.
5. What is 4R's principle?​

Answer 1

(1) It is used in carpets and bed sheets. Nylon – This fiber is derived from wood pulp and is elastic, lustrous and easily washable. It is used in making ropes, fishing nets and seat belts. Polyester – Derived from coal and petroleum, this fiber is wrinkle-free and easily washable

(2)Plastic containers seem more convenient than metal containers. This is because of their light weight, lower price, good strength and easy handling.

(3) PET, which stands for polyethylene terephthalate, is a clear, strong and lightweight plastic belonging to the polyester family. It is typically called "polyester" when used for fibers or fabrics, and "PET" or "PET Resin" when used for bottles, jars, containers and packaging applications.

What are the main applications of PET?

• What are the main applications of PET?Because Polyethylene Terephthalate is an excellent water and moisture barrier material, plastic bottles made from PET are widely used for mineral water and carbonated soft drinks.
• What are the main applications of PET?Because Polyethylene Terephthalate is an excellent water and moisture barrier material, plastic bottles made from PET are widely used for mineral water and carbonated soft drinks.Its high mechanical strength, makes Polyethylene Terephthalate films ideal for use in tape applications.

(4)Rayon is a regenerated cellulose fiber that is made from natural sources of cellulose, such as wood and related agricultural products. ... A specific term for viscose rayon — rayon made using the viscose process.

Uses of Rayon

• of RayonRayon is used in textile industry for making clothing like sarees, blouses, dresses, socks.
• It is used to make furnishing such as bed-sheets, curtains, blankets etc.
• It is used to make carpets.
• It is used in medical field for making bandages and surgical dressing.

(5)

• The 4R means Reduce, Reuse, Recycle and Restore. ...
• Reuse: We should reuse the materials instead of dumping. Example: Plastic bags can be reused to make decorative things