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Mihira Chaudhary 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
A weedicide is a chemical that is used to destroy weeds. Weedicides destroy weeds without affecting the crops.
Dalapon, metolachlor, and simazine are examples of weedicides.
Harkanwal Aujla 5 years, 3 months ago
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Amra Fatima 5 years, 3 months ago
Posted by Noman Shaikh 5 years, 3 months ago
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Pragya Bharti 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
Plastics are non biodegradable. They don't decompose easily in soil. Hence it will pollute the soil and considered as environment non-friendly.
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
● Thermoplastics : - Plastics which have a linear arrangement of molecules are thermoplastics. These plastics can be deformed easily on heating and can be remoulded into a new shape. Example - Terylene , nylon , etc.
● Thermosetting plastics : - Plastics which have a cross - linked arrangement of molecules are called thermosetting plastics. These plastics cannot be remoulded again by gentle heating. Example - Bakelite , melamine , etc.
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Polyester
- This fibre derived its name from a combination of two commonly known words namely polymer - having many parts and -ester - a chemical compound due to which fruits get their names.
- It is a durable fibre possessing the characteristics of resiliency due to which they are resistant to wrinkles.
1) It is used in marking fabric for saree, dress material and curteins
2) It is mixed with cotton for making shirts,trousers and other dresses.
3) It is mixed with wool for making suits.
4) It is used for making sails of sail-boat.
5) It is used for making water hoes for fire-fighting operations.
Posted by Noman Shaikh 5 years, 3 months ago
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Reethika ? Reethika ? 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
1)It is used for making textiles like sarees,shirts,neck-ties,socks etc.
2)It is used in making curtains,sleeping bags, tents.
3)It is used in making ropes, car seat-belt, fishing nets, tyre cord, strings for sports racket and musical instrument and paint brushes.
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Synthetic fibres possess following unique characteristics:
- They are durable and inexpensive.
- They are light weight, smooth and soft than any other fibre.
- They are easy to maintain as compared to natural fibres.
- They can be easily washed and dried.
- They are resilient to wrinkles which makes them more demanding in clothing industry.
- Their tenacity makes them find use in many industries.
Posted by Noman Shaikh 5 years, 3 months ago
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Manish Shukla 5 years, 3 months ago
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Clothes made up of nylon are strong because they are manufactured in factory by chemicals but cotton, and wool are not so they don't last long.
Yogita Ingle 5 years, 3 months ago
Actually nylon is an artificial fibre, which have elasticity, strength as well as stretching capacity.
Along with it, nylon can't be damaged by any natural infected like of moths, insects, etc to they are last longer.
Posted by Noman Shaikh 5 years, 3 months ago
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Anchal Kothari 5 years, 3 months ago
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
| NATURAL FIBRES | SYNTHETIC FIBRES |
| Comes from nature | Man made fibres |
| Natural color | Color as per requirement is added in color bath |
| During spinning process spinneret is not necessary | During spinning process spinneret is necessary for the production of filament |
| Chances of containing dust or impurities | No chance of any dust or impurities |
| Less durable than synthetic | More durable than natural |
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
There are two types of plastics which are written below:
- Thermoplastics
- Thermosetting plastics
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Synthetic fibers melt on heating. If they catch fire, they melt and stick to the body of the person wearing them. This is why it is advised not to wear clothes made of synthetic fiber while working in a kitchen or in a fire laboratory.
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Because synthetic fibers are more hydrophobic than natural fibers.
Cotton, linen, wool, hemp: these fibers are absorbent, and will take on water until they are replete.
Nylon and polyester, the two fabrics most commonly used in raincoats and umbrellas, are not naturally absorbent the way natural fibers are. They naturally resist waterlogging, and with a little bit of treatment they can be made quite waterproof.
Cotton and other natural fibers, on the other hand, require a lot of treatment to become suitable for wear in heavy rain. And everyone who has ever been around a wet wool coat or sweater knows that wet wool smells like a wet dog.
Yogita Ingle 5 years, 3 months ago
Because synthetic fibers are more hydrophobic than natural fibers.
Cotton, linen, wool, hemp: these fibers are absorbent, and will take on water until they are replete.
Nylon and polyester, the two fabrics most commonly used in raincoats and umbrellas, are not naturally absorbent the way natural fibers are. They naturally resist waterlogging, and with a little bit of treatment they can be made quite waterproof.
Cotton and other natural fibers, on the other hand, require a lot of treatment to become suitable for wear in heavy rain. And everyone who has ever been around a wet wool coat or sweater knows that wet wool smells like a wet dog.
Posted by Noman Shaikh 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Nylon is called the wonder polymer. Nylon is made without using any natural material, either plant or animal. It is the first man-made fibre entirely made from chemicals. It was first marketed in 1938 and derives its name from the 2 cities of New York and London.
Posted by Noman Shaikh 5 years, 3 months ago
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Posted by Noman Shaikh 5 years, 3 months ago
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Anchal Kothari 5 years, 3 months ago
1Thank You