Last updated on June 28th, 2023 at 11:09 pm
Class 8 Synthetic Fibers and Plastics Question Answers
Define Polyester.
PET is a well-known kind of polyester. PET is an abbreviation for ‘Poly-Ethylene Terephthalate,’ a synthetic polymer. PET may be converted into fiber or plastic.
Define Acrylic fiber.
Acrylic fiber is produced by the polymerization of a chemical known as acrylonitrile. Acrylic has a wool-like feel and is lightweight, soft, and warm.
Define Plastic.
Plastic is a synthetic substance that, when soft, may be moulded into the desired shape and then hardened to make a lasting object.
Define bakelite.
Bakelite is a highly strong and robust material. Bakelite is a poor conductor of heat and electricity. Bakelite is used to make the handles of many culinary equipments.
What is PVC?
PVC (polyvinyl chloride) is a tough and durable material. It is not as stretchy as polythene. PVC is used to insulate electric cables, pipes, garden hoses, raincoats, seat coverings, and other items.
What is Melamine?
Melamine is a fire-resistant material that can withstand higher temperatures than other polymers. Melamine is used to make floor tiles, break-resistant kitchenware (cups, plates, etc.), ashtrays, and fire-resistant textiles.
What is Teflon?
Teflon is a unique plastic that does not absorb oil or water. Because Teflon material has a slick surface, oil and water do not adhere to it. Teflon can also endure high temperatures. Teflon must be used for a nonstick coating on cookware.
What is Biodegradable material?
Biodegradable is a term used to describe a substance that decomposes naturally.
What is non-biodegradable material?
Non-biodegradable materials are those that cannot be degraded by natural processes.
What are thermoplastics?
Plastic that gets deformed easily on heating and can be bent easily is known as thermoplastics.
What are thermosetting plastics?
Some plastics when moulded once, cannot be softened by heating. These are called thermosetting plastics. Examples are Bakelite and melamine.
Synthetic Fibers and their types:
Synthetic fibers are man-made fibers created from chemical compounds.
There are four major types of synthetic fibers (man-made fibers). These are:
- Rayon,
- Nylon,
- Polyester, and
- Acrylic.