Nylon thread is stronger than steel wire. Rayon is obtained from wood pulp.

A parachute is a device used to slow down the movement of a person or an object when such person/object falls or moves through the air. Parachute is made of nylon because it is more elastic, more resistant to mildew and less expensive.

Acrylic is a popular synthetic fibre that is used as a cheaper substitute of wool. It can be dyed and is available in vibrant colours.

Nylon fibre was strong, elastic and light. Also these fibers are stronger than steel wire. 

Polymers that occur naturally is cellulose. Cellulose is made up of a large number of glucose units.

 Wood, coal and petroleum are used as raw materials for manufacturing synthetic fibres.

  Synthetic fibres are made from cellulose, which comes from th plants.

 Synthetic fibers are very durable and no attacked by insects or pests.

Reduce, Reuse, Recover and Recycle are the 4R's of this principle.

 Melamine is a special type of synthetic plastic which is fire resistant and is used in the making of uniforms of firemen. Teflon is also a synthetic fibre but it is not fire resistant.

 Nylon is made when the appropriate monomers adipic acid and hexamethylene diamine.

 PVC is a thermoplastic. Also, polyethylene is a type of polymer that is a thermoplastic and PET is a thermosetting plastic.

Acrylene resembles wool as both have same texture. 

 Electric plugs and switches are made of thermosetting plastics because they are bad conductors of heat and electricity. So, bakelite and melamine both are used to manufacture plugs and switches.

 Recycling is the process of recovering and reprocessing the material into useful products, sometimes completely different in form from their original state. Both plastic carry bags and toys can be recycled.