dr. ing. Liliana HRISTIAN, Ș. l. dr. ing. Catalin VILCU, Prof. dr. ing. Demetra Lacramioara BORDEIANU, Drd. ing. Maria Magdalena OSTAFE, Drd. ing. Liliana Laura APOSTOL
Rezumat
În lucrare s-a efectuat un studiu privind tratarea în mediu de plasmă a fibrelor de polipropilenă, în variante diferenţiate prin parametrii de lucru ai instalaţiei, rezultând producerea unor modificări apreciabile ale coeficientului de frecare static fibră/metal. Pe baza rezultatelor obţinute în cele 64 de variante experimentale, sau stabilit parametrii instalaţiei Corona, care au influenţat în mod semnificativ procesul: puterea activă a instalaţiei şi numărul de cicluri parcurse de probă în zona de tratament. Din acest motiv, studiul efectuat s-a axat pe evidenţierea modului de influenţă a celor doua variabile independente asupra proprietăţilor fibrelor de polipropilenă, precum şi determinarea unor condiţii de optimizare a acestora. În acest scop s-a utilizat programarea factorială, prin adoptarea unui program central compus rotabil, cu două variabile independente (x1 – numărul de cicluri, Nc; x2 – puterea activă, Pa, W) și o variabilă dependentă (y1-coeficientul de frecare static fibra/metal, μs). Studiul efectuat, evidenţiază faptul că tratamentele în mediu de plasmă produc modificări pe suprafaţa şi în structura fibrelor şi implicit afectează proprietăţile acestora.
Cuvinte cheie: coeficient de frecare staticplasmaprogramare factorialăfibre polipropilenice
Abstract
The work studies plasma treatment of polypropylene fibers in variants with different working parameters of the installation, resulting in the generation of significant modifications of the static fiber/metal friction coefficient. Based on the results obtained in the 64 experimental variants, one establishes the parameters of the Corona installation that have influenced significantly the process: installation active power and number of cycles through the treatment area. Accordingly, the performed study has focused on showing off the influence on the two independent variables on the polypropylene fibers properties, as well as on the determination of certain conditions to optimize them. With this aim in view, one uses the factorial programming, by adopting a rotable compound central program with two independent variables (x1 – number of cycles, Nc; x2- active power, Pa, W), and a dependent variable (y1 – fiber/metal static friction coefficient, μs).
The performed study reveals that plasma treatment induces modifications of fiber surface and structure and implicitly affects their properties.
Keywords: static friction coefficientplasmafactorial programmingpolypropylene fibers
Din același număr
- EDITORIAL Textile tehnice – prezent şi viitor, ediţia a patra
- RECENT ACHIEVEMENTS IN MACHINERY FOR PROCESSING SHORT STAPLE FIBERS: AN OVERVIEW OF ITMA 2015
- AN OVERVIEW REGARDING THE LABORATORY TESTING AND MEASURING EQUIPMENT – ITMA 2015
- NETTLE FIBER (URTICA DIOICA), BETWEEN MYTH AND REALITY
- STUDY CONCERNING THE INFLUENCE OF PLASMA TREATMENTS ON POLYPROPYLENE FIBERS TENACITY
- FROM SPYDER WEB TO ARTIFICIAL NANOFIBER WEB
- STUDY ON OBTAINING SPECIAL NANOFIBERS
- THE ENSURING OF NONWOVENS CHARGING WITH ADHESIVES AND CHEMICAL AUXILIARS BY CONTROLLING THE LIQUOR LEVEL IN THE VAT AND THE PRESURRE OF FOULARD CYLINDER
- RESEARCH REGARDING THE ACOUSTIC PROPERTIES OF COMPOSITE MATERIALS COMPRISING SHEEP WOOL AND A MINERAL MATRIX
- THE IMPLICATIONS OF THE TANDEM MOISTENING TIME IN THE SPINNING FRAME VAT – WATER TEMPERATURE UPON THE CHARACTERISTICS OF HEMP AND POLYPROPYLENE WET SPUN YARNS
- STUDY OF TENSIONAL PROPERTIES OF POLYPROPYLENE YARNS USING THE REGRESSION AND CORRELATION METHOD
- STUDY ON RECYCLING COTTON FABRIC SCRAPS INTO YARNS