Žaklina domjani drago katovi darko ujevi - t-pot · pdf fileŽaklina domjani drago katovi...
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Žaklina DOMJANIĆ
Drago KATOVIĆ
Darko UJEVIĆ
TSCR Competition 2010/2011
Needs for different types of protection affected the
development of new materials and technological methods
of joining.
Garments designed for specific applications, like
protective clothing against rain and wind, are mostly made
of artificial polymeric materials.
The market increase the use of polyurethane-coated
textiles (high durability and versatility).
The development of artificial polymer materials generated
the development of a new manufacturing method.
TSCR Competition 2010/2011
The best known methods applied in the clothing
industry are:
Joining with sewing seams
Thermal joining
Ultrasonic welding
High-frequency welding
Impermeability of the joined place is equally important as the
impermeability of the material for the waterproof clothing.
Test samples are joined using the technique of high-frequency
welding.
To satisfy standard requirements and handle the cutting parts more
easily, the layers are prejoined on a universal sewing machine.
Each damage of the polymeric material may influence product
quality.
TSCR Competition 2010/2011
PU artificial leather is made of
knitted material and PU
coating
Sewing machine needle
Schmetz BLUK 16/100
A PU artificial leather made by the Company Čateks dd Čakovec
was used for testing.
TSCR Competition 2010/2011
FE SEM - scanning electron
microscope made byTescan
MIRA II LMU
ITV measuring system for
measuring sewing needle
penetration force
TSCR Competition 2010/2011
Mechanical and thermal damage of the PU coated test samples caused by the needle passage through the material by formation
of the sewing stitch
TSCR Competition 2010/2011
Deformation of the needle
point
Removal of the
politetraflouretilena (PTFE)
coating
TSCR Competition 2010/2011
Thermal load of
the needle during
sewing
Relationship between
geometry and penetration
force of the sewing needle
TSCR Competition 2010/2011
In the manufacture of protective clothing it is necessary to
minimize damages resulting from the technological sewing
process.
The results obtained provide an insight into the damages,
therefore it is possible to reduce material damages by proper
harmonization of the factors of needle sizes and needle tip
form, thread fineness, number of material layers, sewing speed,
material type and surface coating.
To select the best parameters, it is necessary to do further
tests, and by comparison of the results obtained the appropriate
sewing needle type and size for the used material can be
determined.
TSCR Competition 2010/2011
Project FP7-REG-POT-2008-1
Prof. Drago Katović, Ph. D.
Prof. Darko Ujević, Ph. D.
Prof. Sandra Bischof-Vukušić, Ph. D.
Assoc. Prof. Edita Vujasinović, Ph. D.
Lecturer Slavica Bogović, M. Sc.
Sanja Horvat-Varga, M.Sc
Company Ĉateks dd Ĉakovec
Hans-Helge Böttcher, ITV Denkendorf
Technical Assistant Zorana Kovaĉević, B. Sc.
Art Director Maja Grakalić, M. A.
TSCR Competition 2010/2011
TSCR Competition 2010/2011