MANUFACTURER
OF CANDLE FILTERS
AND NANOFILTERS
FILTRATION
ULTRAFILTRATION
MANUFACTURER
OF CANDLE FILTERS
AND NANOFILTERS
FILTRATION
SINTEX, a.s. is a manufacturer of wound candle filters
for the separation of solid particles from liquids and
gases for more than 30 years. They are made of perfo-
rated polypropylene tube, on which is wound polypro-
pylene thread or crude yarn of polypropylene, cotton,
aramid, etc.
Classical wound candle filters are manufactured on
a precision cross-winding machine. The length of the
filters is usually 5, 10, 20 inch, the inner diameter is 28
mm, the outer diameter of the coil is 61 ± 2 mm. Ekofil
wound plug inserts are ideally suited for filtering solid
particles of 0.5 - 200 µm size.
ULTRAFILTRATION
The principle of the separation process based on membrane technologies is mechanical filtration of the liquid
medium through a membrane module. The essence of this technology is a semipermeable membrane which
allows the molecules of water and depending on the type of membrane, also the other selected particles up to
certain size to pass through the membrane.
Ultrafiltration belongs to membrane processes. It is a method of water filtration, involving the membrane as
a filter in separation of the particles from a liquid medium. Membranes utilized in the ultrafiltration process
have the porosity of 0,1 to 0,01 m. The driving force is the hydrostatic pressure difference. During the process
of ultrafiltration, the inlet water is divided into a retentate, which remains on the inlet side, and the permeate,
which passes through the membrane.
Linear nanofibrous composite (1D) Flat nanofibrous composite (2D)
FILTRATION
ULTRAFILTRATION
The most efficient nanofiber candle filter is composed of wraps of flat nanofiber membrane and winding of linear
nanofibrous formation, with final diameter of the candle 61 ± 2 mm. Such a composite filter, composed of flat and
linear nanofibrous structures, has a permeability of particles of 20 - 50 nm.
Permeability of TiO2 particles in aqueous dispersion after filtration through a wound candle nanofilter with a
flat nanomembrane and a linear nanofibrous composite
In case of need of ultrafiltration in the area of 100 - 300 nm capture of solid particles, we supplement the wraps of flat
nanomembranes by wrapping polypropylene filament yarn 1000 - 3000 dtex to the full diameter of the candle 61 ± 2 mm.
Candle nanofilters are useful in food filtration of little contaminated liquids with fine solid particles, especially in
final filtration of wines, spirits, milk, beer and vegetable oils.
In addition to ultrafiltration of liquids, candle nanofilters are also highly effective for gas filtration, in particular for
the filtration of polluted air from solid particles of dust, smog, aerosols, allergens, bacteria and viruses.
Within the NANOPROGRESS cluster, the method of effective use of nanofibers into candle filters with different content
and composition of nanofibers has been solved for a long time. The technical solution is related to the liquid and gas
filtration through three-dimensional (3D) filter with flat (2D) and linear (1D) composition of nanofibrous structures.
Cross section of linear nanofibrous composite
The particle size was determined using a Zetasizer
Nano ZS operating on the DLS principle
Penetration (%)
Diameter of particles [nm]
50_40
50_10
Penetration measuring of ammonium sulphate aerosol particles through a candle filter
with nanofibres at air flow rates of 10 and 40 l / min
SINTEX, a.s. is a company based in the Czech Republic, engaged in textile production at all production levels,
i.e. from yarn production, through production of knitted and woven fabrics to finished ready-made products.
Our long-term program is the production of filters. In addition to purely production programs and activities,
the company's core business is also research and development, together with an accredited textile laboratory.
Within the NANPROGRESS cluster we have developed application of wound candle filters with linear and flat
surface nanofibrous formations.
SINTEX, a.s.
Moravska 1078
560 02 Ceská Trebova
Czech Republic
+420 465 569960
info@sintex.cz
Contacts for domestic inquiries
Ing. Jan Homolac
+420603223 376
homolac@sintex.cz
Ing. Daniela Jaskova
+420 731 126 025
jaskova@sintex.cz
www.sintex.cz
NANOPROGRESS z.s.
Ukrajinska 1488/10
101 00 Prague 10
Czech Republic
+420 271 016 201
info@nanoprogress.eu
Contact for inquiries from abroad
Josef Valasek
+420 731 126141
valasek@sindat.cz
