8. Melinex and Hostaphan are two other well-known trade names for this plastic, which is more generally known as BoPET or biaxially-oriented polyethylene terephthalate. • Must be able to be die punched and have good hinge strength at fold lines • If used as Major Insulation, must be able to pass Hi-pot testing • Temperature class • For UL Systems, must meet EIS minimum thickness requirement Outer Wrap/ Ground Insulation The material that is placed over The polymer terms and their definitions are shown in this table. Polyester resins have a limited storage life as they will set or ‘gel’ on their own over a long period of time. These solutions for Man Made Materials are extremely popular among Class 8 students for Science Man Made Materials Solutions come handy for quickly completing your homework and preparing for exams. For use in moulding, a polyester resin requires the addition of several ancillary products. Less fading: Polyester holds dye well to prevent fading, but doesn’t produce as “rich” of a color as cotton. Polyester fibres are widely used in textile industry for making a variety of textiles such as sarees, dress materials, curtains, etc. Class 8 Synthetic Fibres and Plastics Short Answer Questions Class 8 Synthetic Fibres and Plastics Short Answer Questions 1.Name the natural polymer and its units ... (cotton, wool, polyester, rayon, acrylic.) polyester Class of organic substance composed of large molecules arranged in a chain or a network and formed from many smaller molecules through the establishment of ester linkages. Acrylic → It is relatively cheaper than wool. Name the plastic used for making polythene bags. done clear. Question from very important topics are covered by NCERT Exemplar Class 8.You also get idea about the type of questions and method to answer in your Class 8th examination. ... State the unique characteristic of polyester fabric and is applications 16.fill in the blanks :- a. Rayon is prepared from _____ . NCERT Solutions Class 8 Science Chapter 3 Synthetic Fibres And Plastics. 2. Short Q&A: Q1: Differentiate between natural and artificial fibres. But nowadays, synthetic fibres are largely used for clothing and other purposes. So, what’s the bottom line? Polyester plastics are used to make automobile parts, boats and bottles. Polyester | definition of polyester by merriam-webster. Polyester is made up of the repeating units of an ester. High-quality polyester holds its shape well and doesn’t shrink. 8th Class Science Synthetic Fibers and Plastics ... Polyester is a synthetic fibre. As with any synthetic material, reactions can occur, but these are vastly limited, especially when polyester is blended with other fibres, such as cotton. Cbse class 8 science synth fibres and plastics (6/9) polyester. Think about this in a landfill. 1. Polyester is a common name used to describe long-chain polymers composed of ester groups in the main chain. Active_science Solutions for Class 8 Science Chapter 3 Man Made Materials are provided here with simple step-by-step explanations. Question 10. Class 6 Science Chapter 3 Textbook Questions Solved. Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 8 so that you can refer them as and when required. Deciding which type of fabric to make an item with is an important decision, as fabrics can have countless qualities. Polyester → Fabric made from polyester does not get wrinkled easily. Polyester is used for making sails of sailboats. Natural fabrics have been used for clothing since ancient times. done clear. NCERT Solutions for Class 6 Science Chapter 3 Fibre to Fabric in English Medium or अध्याय 3: तंतु से वस्त्र तक in हिंदी मीडियम free to use or download for offline use … Any of numerous synthetic polymers produced chiefly by reaction of dicarboxylic acids with dihydric alcohols and used primarily as light, ... polyester - any of a large class of synthetic fabrics. Class 7. Polyethylene terephthalate (PET) is a thermoplastic polymer resin of the polyester family and is used in synthetic fibres. is less than 1/32 inch (0.8 mm).] Polyesters synonyms, Polyesters pronunciation, Polyesters translation, English dictionary definition of Polyesters. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. ... NCERT Solutions for Class 8 Science Chapter 3 – 5 Mark Questions and Answers. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 8.. 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