Powder Coating By RollwinIndia

    RollwinIndia Powder coating is special type of coating which is applied as free flowing  powder to aluminium
    doors and windows. The key variation between conventional liquid paint and powder coating is that the powder
    coating does not need a solvent to keep the binder and filler parts in a liquid suspension form. The coating is
    normally applied electrostatically and then cured under heat to let it to flow and form a film,The powder can be  
    thermoplastic or a thermoset polymer. It is usually used to produce a hard finish that is tougher than
    conventional paint. Powder coating is mainly used for coating of aluminium & other metals
    Branded Powder is essential key ingredient in producing the excellent finish
    We use branded powders and high end imported powders too as per the requirements

    RollwinIndia offers variety of finish to aluminium extruded window sections.
    The most common polymers are polyurethane, polyester epoxy, polyester, epoxy, acrylics

    a)        polymer granules are mixed along with hardener, pigments &  powder ingredients in  mixer
    b)        The mixture is heated in an extruder
    c)        The extruded mixture is rolled even, cooled
    d)        Then broken down into tiny chips
    e)        It is then sieved  to formulate a fine powder

    The powder coating system involves three essential steps:

    A ) The pretreatment- elimination of oil, dust, welding scales greases, metal oxides, etc.is compulsory earlier to
    the powder coating procedure

    B) The application of powder - Common way of applying the powder coat to sections  is by spraying the
    powder via an electrostatic gun, or corona gun. The gun imparts a negative electric charge to the powder,
    which is then sprayed towards the aluminium sections  by mechanical or compressed air spraying and then
    accelerated toward the section by the powerful electrostatic charge

    C) Heating process -The sections are  then heated in a kiln with pre set temperature, and then as heating
    gradually increases the  powder melts into a homogeneous film, and is then cooled to form a beautiful coating

    D) Curing of end product - cure process, called cross linking, needs a set  temperature for a assured duration
    of time in order to achieve better cure and create the full layer properties for which the objects was designed.
    In common the powders cure at 200°C   for 10 to 12  minutes .

                all rights reserved