Short Answer Type Questions
Question 1: Write some salient features of rayon.
Question 2: What are the characteristics of synthetic fibres?
Question 3: Plastic bags create which kinds of problems?
Question 4: Write a short note on acrylic.
Question 5: What is the difference between nylon and rayon?
Long Answer Type Questions
Question 1: Explain the discovery and unique features of nylon.
Question 2: Explain different types of plastic and their usages.
Question 3: What are the reasons for popularity of plastic?
Answers
Answer:
see in down
Explanation:
some salient features of rayon are;
- comfortable
- soft to the skin
the characteristics of synthetic fiber are;
- it is cheaper than natural fibers.
- it is stronger than natural fibers.
- it is dry up in less time.
plastic bags create air pollution,water pollution and soil pollution that kind of problem.
Acrylic is lightweight, soft, and warm, with a wool-like feel.it also called acrilan fabric.it take color well and is washable.
1] Ans. Rayon Fiber is comfortable, soft to the skin, and has the moderate dry strength and abrasion resistance. One of the Rayon Fiber's strengths is its versatility and ability to blend easily with many fibers—sometimes to reduce cost, other times for luster, softness, or absorbency and resulting comfort.
2] Synthetic fibres are cheaper than natural fibre. Synthetic fibres are stronger than natural fibre. Synthetic fibres are more durable than natural fibre. Synthetic fabrics are dried up in less time. Synthetic fibres are easy to maintain and wash.
3] Plastic bags start out as fossil fuels and end up as deadly waste in landfills and the ocean. Birds often mistake shredded plastic bags for food, filling their stomachs with toxic debris.
4] Acrylic is a man-made fibre. Acrylic is known as artificial wool or synthetic wool because it resembles wool. Acrylic is cheaper than natural wool and can be dyed in various colour. This makes acrylic is very popular among other fabrics.
5] Both Rayon and Nylon are artificially made fibers but still they are different in their properties. Rayon is a semi synthetic fibre which is woven with some natural fibres. Nylon, on the other hand, is a synthetic fiber completely. The basic difference between the two is their response to wear and tear.
Long answer
1] Explain the discovery and unique features of nylon. ... No ingredient from plant or animal source was used in making nylon, as it is made from coal, water and air. Hence, nylon is called the first truly synthetic fibre. Nylon is strong, light and elastic.
2] 1: Polyethylene Terephthalate (PET)
One of the plastics you are most likely to come into physical contact with on a daily basis, depending on how it is made PET can be completely rigid or flexible, and because of its molecular construction it is impact, chemical and weather resistant and a terrific water and gas barrier.
Common uses of PET: Soft drink, water, cooking oil bottles, packaging trays, frozen ready-meal trays, First-aid blankets, polar fleece.
2: High Density Polyethylene (HDPE)
Incredibly strong considering its density, HDPE is a solid material that can tolerate high temperatures and strong chemicals. One of the reasons that HDPE is used so regularly is that it can be recycled in many different ways and therefore converted into many different things.
Common uses of HDPE: Cleaning solution and soap containers, Food and drink storage, shopping bags, freezer bags, pipes, insulation, bottle caps, vehicle fuel tanks, protective helmets, faux-wood planks, recycled wood-plastic composites.
3: Polyvinyl Chloride (PVC)
Cost effective to produce and highly resilient to chemical and biological damage, PVC is easy to work with and mould into shapes; making it an extremely practical material. In terms of properties, PVC is one of the most versatile. It can be used to create rigid, lightweight sheets, like Foamex, but it can also be used to make faux-leather materials like leatherette and pleather.
Common uses of PVC: Signage, furniture, clothing, medical containers, tubing, water and sewage pipes, flooring, cladding, vinyl records, cables, cleaning solution containers, water bottles.
4: Low Density Polyethylene (LDPE)
At general living temperatures LDPE is a highly non-reactive material, which explains why it has become one of the most common plastics in use at the moment. It can withstand temperatures approaching 100°C, and though it is not as strong as HDPE (its high density counterpart), it is certainly more resilient.
Common uses of LDPE: Trays, containers, work surfaces, machine parts, lids, '6-ring' drink holders, drink cartons, protective shells, computer hardware casings, playground fixtures (slides and the like), bin-bags, laundry bags.
5: Polypropylene (PP)
Strong and flexible, polypropylene is a very hard wearing plastic that, when melted, is one of the most effective materials for injection moulding. Having said that, it has quite a high tolerance to high temperatures, relative to other plastics, and is considered to be a food safe material.
Common uses of Polypropylene: Clothing, surgery tools and supplies, hobbyist model, bottle caps, food containers, straws, crisp bags, kettles, lunch boxes, packing tape.
3] High Durability. Plastic containers are extremely durable. ...
Cost Effective. Plastic is one of the cheapest storage and packaging materials. ...
Longevity and Durable. ...
High Flexibility. ...
Easy To Transport and Store.