CC BY
54
Section 6. Technical sciences
DOI: http://dx.doi.org/10.20534/AJT-16-11.12-32-35
Bekmuratova Zulfiya Tleumuratovna, Karakalpak State University named of Berdakh, department of «Chemical mechnology», senior teacher
Alimova Halimahon, Dr.Sci.Tech., Tashkent institute textile and light industry, department of "Technology of silk and spinning» Avazov Komil Raxmatovich, Tashkent institute textile and light industry, department of "Technology of silk and spinning», Senior Research Fellow Applicant E-mail: [email protected], [email protected] Habibullaev Doniyor Anvardjanovich, Tashkent institute textile and light industry, an independent researcher
Technology of producing textile products of medical use
Abstract: In the article is researched the opportunities' of technical equipment for making high qualified woven unsterile medical cotton bandages with using reduced technical range. Its given technological process and receipt of bleaching severe yarn, from taken bandage of new pattern of given width on the machine Fittex (Italy). By Method ofexperimental research is given technological parameters of production bandage patterns on new way. It is worked out reduced on 5 transformations technology of producing new medical goods.
Keywords: Keywords: woven unsterile medical cotton bandage, production for medical, production technology, the wide of the bandage.
Medical dressings are necessary as they considerably the equipment at textile factories (textile machinery and
contribute to improving the healing efficiency of drugs. finishing equipment).
The gauze can be used for making medical dressings such as The obj ect of the research is textile products of medi-
lengths of fabric, bandages, napkins, both single-layered, and cal use. The experimental research method establishes
multilayered, surgical tampons, gauze turundas, swabs, medi- the technological parametres of manufacturing of the
cal bolsters, balls, for gel-type and salve dressings, compresses, unsterile medical cotton bandage woven according to
immobilization of medicinal agents and preparations. the new method.
During the development of the new sample of ban- According to existing technology, the full cycle ofman-
dage the weft yarn is laid in circular line on the set width ufacturing of gauze bandage in the traditional way includes
of the bandage. Thanks to it the fringe is not formed nei- spinning, weaving and whiting, after that it is sent to a phar-
ther along the edges of bandage, nor at a cut like it hap- maceutical factory where it is made into medical product. pens in gauze bandages, thereby simplifies their opera- The goal of the research is to develop a more reduced
tion, excludes possibility of leaving the smallest threads technology of production of medical cotton bandage by
of a dressing on wounds. There is a necessity to improve using an experimental research.
this kind of product of the textile industry. The produc- The bandage produced in a new way on the FITTEX
tion of the raw, then bleached gauze is carried out by (Italy) machine tool surpasses the traditional gauze ban-
two separate, differing from each other technologies and dage in all respects.
Figure 1. The technological chain of the development of the medical cotton gauze bandage and the bandage of new type
The new technology of development of the woven unsterile medical cotton bandage consists of the following basic stages: whiting of a raw yarn, pressing and drying of the bleached yarn, development of the tape of the bandage on the machine tool, getting of the finished goods (fig 1.).
To obtain the new sample of bandage the raw yarn is bleached. The basic and raw weft yarn with linear density of 20 tex, reeled up on the punched cones, is delivered from textile factory.
Acceptance of a grege yarn is carried out according to national standard (OST) -17-198 considering appearance and physical-mechanical properties [1]. A class of yarn appearance is defined according to GOST 15818,
which is characterized by presence of small knots, un-evenness on short pieces, and presence of trash [2].
The necessary technological documents have been developed by us and confirmed by the corresponding organizations.
The described woven unsterile medical cotton bandage in conformity with TSh-Uz-14847912-0001-01 [3] and to Industrial Regulations Pr-92 Uz-03873-14847912-178-04 [4], registered by Uzstandard [5], having License #000037 [6] and the Registration certificate # Uz TT 006/656/11 of the Ministry of Health of Uzbekistan [7] are developed on the reduced technological chain in comparison with the traditional one.
Preparation of the yarn for bleaching is carried cording to the formula confirmed by Industrial Regula-
out in the bleaching shop where reels with a gege yarn is tions.
loomed up in special drums, which are then loaded into Engineering Process and the Bleaching Recipe of
the bleaching unit — autoclave. The yarn is bleached ac- Yarn.
Table 1.
Bleaching (liquor ratio 1: 13)
1 penetrating agent 1 g/l
2 stabilizer 2,6 g/l
3 antifoamer 0,1 g/l
4 caustic soda 2,4 g/l
5 peroxide 8 g/l pH -10 -11,5
flushing
1 hot 60'(80° C)
2 cold 20'
3 cold 20' (pH-7)
To bleach the yarn chemical components are loaded into an autoclave, the process is conducted for 3-6 hours at a temperature ofup to 100 ° C. The bleached yarn is wrung out in a centrifuge and sent into the drying chamber where at a temperature of up to 110 ° C the drying process is conducted. According to the technology of obtaining any medical drugs, first the input raw material is checked; only then the final product is made from it. Laboratory researches of the bleached yarn were conducted on physical and chemical properties as entrance raw materials in accordance with STP Uz-14847912-001-00 [8] and must correspond to requirements. If the results of tests are unsatisfactory even by one indicator, the bleached yarn is not accepted for manufacturing bandage.
Thus, the control of entrance raw materials before obtaining the new sample of the bandage is conducted, which is important from the point of view of economy of time, raw materials and all basic auxiliary means. After the drying process the bleached yarn moves to Fittex machine tools where the bandage tape is produced. The general principle of the formation of a cloth is kept on these machine tools. The basis is formed by a knitted structure through making a weft with tubular needles.
It is possible to develop 12; 8; 6; 4 cloths of a bandage — tape on the machine tool in parallel, with the width provided by standard documents 14cm; 10cm; 7cm; 5cm., accordingly.
According to the new way of manufacturing of woven unsterile medical cotton bandage, the technological process is reduced to 5 transitions in comparison to the existing one. At the achievement of the set diameter of the bandage-tape roll on the machine tool, removal is carried out. Bandage- tape rolls are cut on tape-cutting devices
at length of 5 metres. In accordance with the technology packing is provided on the SWIFT equipment and the bandage of the new type is wrapped in propylene paper, the edges being welded. Packing is thought to be distinct. The woven bandage is packed in the container, according to TshUz -14847912-001-00. The obtained woven unsterile medical bandage surpasses gauze bandage on all indicators [9]. For the purpose of preventing of possible adverse influence on the health of the person, medical products are subj ect to obligatory hygienic tests. In this respect sanitary-chemical, toxicological, physical and chemical researches of the bandage of the new sample were carried out in the Research Institute of Sanitary, Hygiene and Occupational Diseases (NIICGPz) with the aim of receiving the Hygienic Certificate [10].
Results of toxicological and hygienic tests have shown, that they do not possess skin-irritating, skin-re-sorptive and general toxic effects, and do not have sensitizing properties either [11]. Like all medications and medical equipment, the new type of bandage has passed clinical tests in three basic medical institutions, namely, in the Research Centre of Surgery named after academician V. V. Vahidova, in the Second Tashkent State Medical Institute, and in the Research Institute of Traumatology and Orthopedics. Natural researches of the new type of bandage have been carried out on volunteers for the purpose of revealing the presence or absence of side-effects during the use ofbandage. Bandages of the new type were used for imposing on limbs for 10-12 hours over 10 days. Objective and subjective sensations of patients were also considered. Bandages were used on 17 patients during operation as a dressing and on 15 patients in the form of a pressure dressing and fixing bandage after an-giographic study.
The results of the survey of volunteers have shown new type correspond to the developed specifications
that the bandage does not cause irritation, itching, peel- on hygroscopicity, elasticity, durability, capillarity, and
ing of a skin [12] and it is also convenient for impos- keeps the properties after sterilization. ing dressings due to its elasticity and durability. It also On the basis of an experimental research the new
fixes perfectly the sterile dressing on limbs [13]. After technology of the production of the woven unsterile
sterilization in an autoclave, it keeps the whiteness, hy- medical cotton bandage reduced to 5 transitions has groscopicity, capillarity, and can be used as a dressing been developed. All necessary technological require-
material during the operation and after it [14]. ments of the new sample of the bandage are prepared
The woven unsterile medical cotton bandage ob- and confirmed in due time. On the basis of toxicological,
tained in a new way, in comparison to the traditional hygienic and operational properties of the new product
bandage prepared from gauze, does not get garneted, line, after approbations of the unsterile medical cotton
which makes them more practical for imposing of fix- bandage in the clinical medical conditions conducted in
ing pressing dressings, for the preparation of a dressing due time, the new type of medical bandage is created ac-
material for operation. The carried out researches have cording to the new method of production, and it meets
allowed us to draw a conclusion, that the bandage of the the requirements on all accounts.
References:
1. OST-17-198 2.
2. GOST 15818.
3. Bekmuratova Z. T. Tsh Uz 1447912-001-2001 "The Woven Medical Unsterile Bandage" - 2001, - UDN 615.468.2:006.354 group F 12, joint-stock company "KaTeKc".
4. Industrial Regulations PR 42 Uz. 03873-14807912-178-04, - 2001, joint-stock company "KaTeKc".
5. State standards and guideline Republic of Uzb. The informational index quarter I, - 2003.
6. The licence, series FF - No 000037, - Tashkent, - 1999. - 8.06.
7. The Registration certificate - No Uz TT 006/656/11 Ministry of Health, Republic of Uzb.
8. STP Uz-14847912-001-00 for the Bleached yarn.
9. Bekmuratova Z. T. "On the Issue of Working out the Specifications on Manufacturing of the Woven Bandages ", the Bulletin, Karakalpak Branch, AS Uzb. - 2005. - No 3, - P. 49-50.
10. Ministry of Health of Uzb. Scientific Research Institute of Sanitary, Hygiene and Occupational Diseases: the Hygienic certificate - No 017, 5.12 is accredited by Uzbek State Standard NSS.UZ.07.NSO.111. - 2000.
11. Ministry of Health of Uzb. Research Institute of Sanitary, Hygiene and Occupational Diseases. The certificate for hygienic examination of the bandages. from 11.10. - 2000. Tashkent.
12. Research Center of Surgery named after aacademician V. V. Vahidov Ministry of Health of Uzb. The certificate on carrying out of clinical tests of samples. from - 17.10. - 2000. - Tashkent.
13. Research Institute of Traumatology and Orthopedics, Ministry of Health of Uzb. The certificate on clinical tests of the products of medical use. from - 13.10. - 2000. - Tashkent.
14. The Second Tashkent State Medical Institute, Ministry of Health of Uzb. The certificate on clinical tests ofprod-ucts of medical use. from - 3.10. - 2000, - Tashkent.
