polyester fibres chemical properties effect of alkalies polyester fibres have good resistance to weak alkalies high temperatures. it exhibits only moderate resistance to strong alkalies at room temperature and is degraded at elevated temperatures. effect of acids weak acids, even at the boiling point...
yarn spinning procedures standard staple yarn spinning procedures industrial staple yarn spinning yarn making from staple fibers involves picking (opening, sorting, cleaning, blending), carding and combing (separating and aligning), drawing (re-blending), drafting (drawing into a long strand) and spinning...
yarn / materials in regard ofsynthetic type spinning. extrusion coated yarn technique of coating a yarn with a second layer of polymer. this includes the bicomponent technique where the sheath coating is applied onto the core directly while extruding. extrusion coating can however also be applied after...
nov , technical tests require skilled personnel who can handle and use the equipment and chemicals for the analysis of the textile fibres. among microscopic tests and chemical tests, microscopic tests are mainly used for natural fibre. the test identifies the natural fibres more easily as compared to...
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of cellulose nitrate (collodion) through small holes (spinnerets). these pioneer manmade fibers were replaced by... manmade fiber manufacturing of manmade fibers textile school jun , manmade fibers are manufactured using different mechanical and chemical processes for example synthetic fibers from thermoplastics...
as in the example shown, with a straight stitch, which overlaps the edge of each shape. the pattern pieces that make up the applique are usually backed with interfacing to give them strength. embellishment metropolitan museum of art [ cc ], via wikimedia commons this is the application of a variety of...