Best scientific research 2022
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BEST SCIENTIFIC
RESEARCH - 2022 245 essence of one of the methods of obtaining a linear density of 22-200 straight woven sewing thread is to use polyester complex threads to give 200 br/m in the left direction, and when sewing after adding, in the opposite direction, 1.6-2 .0 times more is given. The twists given to the opposite side 1.6-2.0 times more than the initial twist cannot be balanced by the previous twists. If the extra twist is not balanced, the threads will not be fully balanced. Therefore, when it is used in the sewing industry, tangles and breaks occur. This is a disadvantage of the above method. There is also a method of obtaining sewing threads from raw silk with a linear density of 2.33 and 3.23 tex. In it, the process of re- wrapping, adding and sewing 80 br/m, first sewing 400 br/m, second adding 80 br/m half twist, second sewing 400 br/m is done. After the initial twisting, the first boiling and dyeing, the second addition and sewing are given in the opposite direction. The disadvantages of this method are the multi-stage technological processes and the low breaking characteristics that lead to the breaking of sewing threads when the product is sewn. In the technology of obtaining sewing threads from raw silk, improved by us, reduction of the process to 4 passes ensures high technical results, improvement of operational properties of the thread, and increase of durability. For example: sewing thread of 18-19 straight line density from natural silk is made as follows: raw silk of 2.33 and 3.23 straight line density is rewound. By adding, respectively, 6-20 and 3-14 threads are added at the same time, giving 700 and 600 br/m in the right direction. CONCLUSION In conclusion, it should be mentioned that the classification of sewing threads has expanded with the production of a new assortment. A rational ratio of the parameters of the silk sewing thread to the thickness of the fabric and the sewing needle was recommended. REFERENCE: 1. Mamayunusova, M., & Ergasheva, Z. (2022). KIMYOVIY TEXNOLOGIYA FANINI O’QITISHDA DIDAKTIK O'YIN METODLARINING AHAMIYATI. Eurasian Journal of Academic Research, 2(11), 707-711. |
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