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  3. MIRALLOY® For the Clothing Industry

MIRALLOY® For the Clothing Industry

    Brand: UMICORE
    Origin:

    Germany
    028 3838 0482

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    Copper-tin-(zinc) electrolytes as nickel-free alternatives

    Since 1981, MIRALLOY® has been a good alternative for nickelfree coatings in the clothing industry. Today, our customers all over the world profit from more than 30 years of experience and the continuous further development of the product series.

    With MIRALLOY®, electrolytes are used to deposit copper-tin(-zinc) coatings in rack and barrel plating. The colour of the coatings is white – similar to silver.

    Plated garment accessories, such as zips and metal buttons, offer a very high level of resistance to everyday wear.

    A further plating layer with gold, rhodium, palladium or other precious metals, as well as tarnish protection if required, can be added problem-free by choosing a suitable process and with the right pre-treatment.

    Electrolyte characteristics

    Electrolyte type

    Alkaline-cyanide

    Metal content

    8.5 g/l Cu 34.0 g/l Sn 0.75 g/l Zn

    pH value

    > 13

    Operating temperature

    60 °C

    Current density range

    0.5 (0.3 - 1.0) A/dm²

    Plating speed

    Approx. 0.12 μm/ min at 0.5 A/dm²

    Anode material

    MMO (type PLATINODE® 167, graphite)

    Coating characteristics

    Coating

    Copper-tin-zinc

    Alloy composition

    55 wt. % Cu 30 wt. % Sn 15 wt. % Zn

    Colour of deposit

    White

    Brightness

    Bright

    Hardness

    550 HV

    Max. coating thickness

    5 μm

    Density of the coating

    8.2 g/cm³


    Advantages

    • Copper-tin-(zinc) alloy coatings
    • Bright white coatings (similar to silver)
    • Diamagnetic
    • Nickel-free (§27 of REACH, Ann. XVII, Reg. (EC) No 1907/2006, Standard 100 by OEKO-Tex®)
    • Free from heavy metals like Cr, Pb, Co, Th etc.
    • Resistant to tarnishing and corrosion
    • Excellent layer thickness distribution
    • Wide operating range
    • Can be lacquered
    • Can be combined with precious metals
    • The coatings are RoHS compliant
    • Tried and tested process by many zip manufacturers


    Applications

    • Zip parts
    • Metal buttons
    • Bra fasteners
    • Buckles
    • Haberdashery







    Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.

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    Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.