Polymers 2 are the resource for man-made fibres, which are derived mostly from oil. Answer: The jute plant is normally harvested at flowering stage. When the jute plant is in the flowering stage, it is harvested. A Gift of Chappals - Solved Exercises, CBSE Class VII (7th) Science | Solved Lesson Exercises, Chapter 8 Motion | Physics | MCQs | Class 9th | - Multiple Choice Questions, CBSE Class VII (7th) English Lesson 1 : Three Questions - Solved Exercises, Chapter 2. d) The process of removing seed from cotton is called ginning. Retting is a process in which the tied bundles of jute stalks are taken to the tank by which fibres get loosened and separated from the woody stalk. Fibre to Fabric NCERT – Question: Cocoon is used to obtain silk thread. Jute" is the name of the plant or fiber used to make burlap, hessian or gunny cloth. Why did the king want to know answer to three questions? Obtaining technical fibre is associated with the destruction of the stem or other part of the plant containing fibre bearing tissues (e.g. Life Processes | Solved Exercises, CBSE Class X (10th) Social Science Sample Question Papers Summative Assessment II (SA-2), CBSE Class X (10th) English Sample Question Papers Summative Assessment II (SA-2), Continuous and Comprehensive Evaluation (CCE) - Frequently Asked Questions - FAQs. This sticky substance needs to be removed in order to obtain the fibres. This process saponifies the natural waxes on the fiber and the rest of the plant is softened. Jute fiber is being dehydrated in sunlight after natural or microbial retting Retting is the process of extracting fibers from the long lasting life stem or bast of the bast fiber plants. Silk thread so obtained is woven into different types of cloths, i.e. Jute is extensively used for making gunny bags, potato sacks, carpets, curtains, coarse clothes and ropes, etc. Lesson 2 : How the Dog Found Himself A Master ? Weaving: Weaving involves making fabric by arranging two sets of yarn. The process of taking out threads from the cocoon for … LOJAS AS MELHORES LOJAS PRA VOCÊ E SUA FAMÍLIA. Answer: The thin strands are called as yarns which are made from fibre. d) The process of removing seed from cotton is called ginning. Jute is obtained from the stem of jute plant. During this period, the stem of the plant rots and the fibres (present in the stem) remain.The process by which fibres are obtained from the stem of the plant is known as retting.These fibres can then be separated from the non-fibrous matter by hand. The retting process consists of bundling jute stems together and immersing them in slow running water. It is mainly grown in the rainy season. Can you give four examples of such clothes. It is used for making carpets, ropes, covers and mattress. This site is using cookies under cookie policy. Weaving: Weaving involves making fabric by arranging two sets of yarn. e) Weaving of yarn makes a piece of fabric. True False c) Jute is the outer covering of coconut. 2.13 Explain the process of making yarn from fibre. Jute fibre is very strong. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? Spinning is done at home using simple devices like hand spindle (Takli) and charkha. It is produced from flowering plants in the genus Corchorus, which is in the mallow family Malvaceae.The primary source of the fiber is Corchorus olitorius, but it is considered inferior to Corchorus capsularis. " After harvesting, it is kept submerged in water for a few days. Spinning is the process of making yarn. Piles of cocoons are kept under the sun, boiled or exposed to steam. Jute fibre is used for making ropes and jute bags. It is also obtained from the hair of rabbits, yak and camels. A process called retting is used to remove the non-fibrous material from the stem and skin of the jute stalk. In this process, fibres from a mass of cotton are drawn out and twisted. e) Weaving of yar n makes a piece of fabric. The flow diagram of the fibre to fabric process is shown in Figure 1. In India, jute is basically grown in the states of Bihar, West Bengal and Assam. While there are a few different botanical varieties of jute, one of the main species used to make jute fabric is Corchorus olitorius (white jute). 1. (c) Jute is the outer covering of coconut. When the jute plant is in the flowering stage, it is harvested. Question 17. Nowadays, fibre is obtained from the fibre plant. Plant fibres and animal fibres constitute the natural fibres. It is a soft and smooth fibre. Ans. It is used in the production of fibre from plant materials such as flax and hemp stalks and coir from coconut husks. 3. Jute is a long, soft, shiny bast fiber that can be spun into coarse, strong threads. To extract the fibres from the stem, the process is carried out in the following stages : Retting Retting is a process in which the tied bundles of jute stalks are taken to the tank by which fibres get loosened and separated from the woody stalk. Explain the process of obtaining silk from cocoon. Wool. Lesson 1 : Who Did Patrick’s Homework ? 1)the jute fibre is obtained from the stem of the jute plant. There are two main processes of making fabric from fibre – weaving and knitting. Obtaining of silk from cocoon: First of all, cocoons are boiled and then silk fiber is separated out; using machines. fiber. The bundles are steeped in … In this process, fibres from a mass of cotton wool are drawn out and twisted. Retting softens the stalks and makes it possible to separate the fibrous material from the unusable material by hand. 4)the stems rot and the jute fibre is seperated by hand. Explain how fibres are obtained from the jute plants. Jute fiber is obtained from the stem of the jute plant. d) The process of removing seed from cotton is called ginning. Exercises |Chapter 2. 2.14.1 The Process of Making Fabric from Yarn; Class 6 Science Chapter 3 Important Questions 2020-21 . Ques 5: Name two items that are made from coconut fibre. Preparation of yarn from fibres by spinning. The fibres are then stripped from the stalks in long strands and washed in clear, running water. The end result is a strick, a half-pound bundle of long, light grey fibers which resemble human hair. Jute fibers can be derived from both the inner stem and the outer skin of the stalk. b) Spinning is a process of making fibres. Q.2: State whether the following statements are true or false: a) Yarn is made from fibres. f) Silk fibre is obtained from the stem of a plant. The silk fibres separate out. In multi-... Download : Vasant Part-1 Textbook of Hindi For Class VI Vasant Part-1 Textbook of Hindi For Class VI, Copyright © 2011-2014 www.cbsemaster.org, . The processing of silk from cocoons follows - Step1: Separation of the silk fibre from the cocoon. The life cycle of a silkworm begins from the: Stage 1-After mating, female silk moth lays around 200 – 300 eggs at a time. So we call them synthetic. • Scouring -the removal of all impurities from grease wool, using water, detergent, and sometimes a mild alkali. The stems rot (the process is called retting) and fibres are separated by hand. How? this brings the fibers together to from a Yarn. b) Spinning is a process of making fibres. For thousands of years natural fibres were the only ones available for making fabrics. This process brings all the fibres together to from a yarn. For example, cotton fabric can be stitched into a cotton frock or a cotton kurta. In India, jute is grown in West Bengal, Bihar and Assam. Cotton and jute are examples of fibres obtained from plants. (iii) Jute is the outer covering of coconut. These fibres can then be separated from the non-fibrous matter by hand. Jute fibre is obtained only from the stem of the jute plants. 1. Jute is sometimes also called as the golden fibre. Jute fibre is pale- yellow in colour and 2to 3 meter long. A pile of cocoons is used for obtaining silk fibres. These fibres are converted into yarns to make fabrics (Fig). Meena ... Chapter 1. SEGMENTO. Explain sericulture how much time does it approximately take from the day of lying eggs by the silk moth to obtaining silk from it; Define reeling of silk; State the steps involved in the production of wool ; Write a brief note about anthrax? What is a larva ? The type of fibre determines the extraction process to be used. These are called coconut fibres. Motion | Lesson Exercises, CBSE Class 7th (VII) English Chapter 2. At flowering stage only, jute plants are cut and a good quality fibre is obtained at this stage. Processing Silk: Extracting silk from the cocoon is called processing silk. Sorting Materials into Groups : CBSE - NCERT Clas... Fibre to Fabric. (True) f) Silk fibre is obtained from the stem of a plant. The cocoons are kept under the sun or boiled or exposed to steam. Final separation of the fibre is accomplished by a breaking process in which the brittle woody portion of the straw is broken, either by hand or by passing through rollers, followed by the scutching operation, which removes the broken woody pieces (shives) by beating or scraping. Guru5061 Guru5061 09.06.2020 Hindi Secondary School +5 pts. Earlier, ginning was done by hand, but nowadays, a machine is used. (v) Polyester is a staple fibre. Explain how fibres are obtained from the jute plants. Q.3. Thus, the jute plants are cut from the fields when they are in the flowering stage. Answer. The coconut fibres are used for making ropes and mats.The common name of coconut fibre is coir. Textile – Fibre to Fabric Processing P R Wadje, Non-member This paper is an attempt to provide all basic information related to textile Industry – in the field of manufacturing, purchasing, promoting, selling and so on. The process where the cotton fibers are drawn out and being twisted. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. Explain the process of making plant from fibre on jute Ask for details ; Follow Report by Zithbear6330 04.09.2018 Log in to add a comment Silk yarns come from the cocoon of the silkworm. True False: g. Polyester is a natural fiber. Jute is a strong plant fibre. (ii) Filament are short fibres. This is known as ginning. 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