4@�bYq����a�����8vB��X��;c�K�0!l��y69��ө~�Y@���t�j�i�l(ٙfb5=��f�gt��h����.�Pm-���:x�\_h�������m4�71mu���,w��̕_m��Y�h�_{I���.��]�µ�@|���e�e�W��ሳ�C�]���qd��F�ّy0�����=Cį�QۆU[4��`�]H���G��t{�y�������g��3J B3��ϼ^�:�8$�����!1��m������!R�ҭq}�����N�zM3�3�� ��W� endstream endobj 112 0 obj 898 endobj 113 0 obj << /Filter /FlateDecode /Length 112 0 R >> stream of mercerized cellulose II. Mercerization gives cotton a high luster^ makes it easier to dye^ and Mercerpro- duces brighter and fuller shades. Mercerization is carried out on yarns, fabrics or open or tubular knits. Then fabric is squeezed by the squeezed roller and washing is done in a bath at 85 degree Celsius. It passes through so quickly that the yarn itself doesn't burn but the millions of fuzzies and slubs on the yarn are eliminated instantly. <> Mercerization Conditions and Characterized by NIR FT Raman Spectroscopy in Combination with Multivariate Analytical Methods Heléne Almlöf Ambjörnsson,a,* Karla Schenzel,b and Ulf Germgård a Carboxymethyl cellulose (CMC) is produced commercially in a two-stage process consisting of a mercerization stage followed by an etherification stage. 0000007449 00000 n 5 Mercerization Mercerization of cotton with sodium hydroxide and liquid ammonia, process parameters, effect on fibre structure and properties. The improved lustre of mercerised cotton is due to the production of nearly circular cotton fibres under tension. Decol – 1 gpl. ��g4��p�Z�����K�^䱹�S��L LA h����ADv��b��� ����l 0000002211 00000 n condition should be chosen in mercerization process for kapok fiber. The process, which may be applied at the yarn or fabric stage, involves immersion under tension in a caustic soda (sodium hydroxide) solution, which is later neutralized in acid. endobj Mercerizing process consists in treatment of cellulosic materials with concentrated solutions of caustic soda at a temperature of 15 to 18°C. trailer << /Size 132 /Info 101 0 R /Root 103 0 R /Prev 1329046 /ID[<6fb00626958a778daec47cc725731770><6fb00626958a778daec47cc725731770>] >> startxref 0 %%EOF 103 0 obj << /Type /Catalog /Pages 100 0 R /PageMode /UseThumbs /PageLayout /SinglePage /OpenAction 104 0 R >> endobj 104 0 obj << /S /GoTo /D [ 105 0 R /FitH -32768 ] >> endobj 130 0 obj << /S 108 /T 232 /Filter /FlateDecode /Length 131 0 R >> stream 0000008447 00000 n Dye affinity and chemical reactivity increase. mercerization process. 0000006436 00000 n 0000008592 00000 n Fabric is passed for 4-5 minutes. Here we have the whole process of mercerization. Mercerization are two types: 1. x��VKo�0�9����@�Zr;�=�:,�u7�[cN��I��#)ٖ���H�ȏ�GZ�G�4�>+PJ�2�4=�n��{�ͱ���X�RE0[��3�M��ss���� np^�z-��_0�Fm�ݚР��D cÈ�Η�XK�ш�aK0F�h�����*�����r�-7~����2 �2 0000006458 00000 n x��|[E�/>s���,�r�l�w[�e˖{�=�c�wR!� ! The de-twisting unit removes twist from fabric during feeding. Basic surfactant concepts; Mechanism of soil removal ; Scouring ; Solvent Systems; Machinary ; Assessment of scouring efficiency ; Bleaching. Mercerization is a process that makes cotton take dye better and increases its luster! 2 7 Combined preparatory processes Need for combined proceeses. Fabric is passed through a solution which contains 23% NaOH at room temperature. To under- stand the mechanism of mercerization, we need more detailed knowledge on the nature of the alkali-swollen state of cellulose. 4 6 Optical whitening agents Chemistry and application of Optical whitening agents, Mechanism of action. In the original process of Mercer, no tension was applied. stream Mercerization, a textile process named after its inventor, the English chemist John Mercer (1791-1866), was first developed in 1844. H��V���0���ǭԵ ���[��t�6�^\�M�u "N������^�U�[4f޼�f�U�l.����ɇd�{�%i�e�PL�DH��"���ݯݭ2��dS��[=|�O_�y�=�~cSV�1�j��Ծ��65��*2V�W���g����F��b]����8wv��\�H�u0{3>��`�X���qM,!�/.�f� By: Brannon Smith: Single Mercerization is a process in which the yarn used to make a shirt is run through the middle of an open flame at a very high speed. 3 0 obj H�b```g``)a`e`x�� ̀ ��l,X e��|��e]�o�K
2020 mercerization process pdf