Expandable microspheres, such as waytop microspheres, are versatile additives used in leather finishing to enhance various properties and address imperfections in leather products. The application of expandable microspheres in leather finishing involves two main processes: stucco application and base coat application.
1. Stucco Application:
– Stucco is a coating paste used to upgrade leathers with defects like scars, thorn marks, and insects.
– Mix expanded waytop microspheres with a suitable binder, such as water-based polyurethane or acrylics, to create the stucco.
– Ensure proper dispersion of the microspheres using a dissolver or powerful mixer to achieve a homogeneous mixture .
– Adjust the viscosity of the stucco by adding a thickener to create a paste suitable for application with a spatula .
– Apply the stucco to the leather surface and allow it to dry for 12 to 24 hours before buffing and de-dusting .
– After buffing, continue with the final leather finishing and embossing using conventional techniques to achieve the desired appearance .
2. Base Coat Application:
– Expandable microspheres can also be used in base coats to cover defects in hides and skins and improve the overall surface properties of the leather .
– Mix waytop microspheres into a binder to form a base coat that provides uniformity and equal properties across the leather surface .
– Dilute the stucco with water and/or binder to reduce viscosity for spraying or roller coating applications .
– Ensure thorough mixing of the microspheres with polyurethane or acrylic binders to achieve a consistent base coat .
– Apply the base coat to the leather surface, following standard techniques for subsequent top coat application and finishing .
Benefits of Using Expandable Microspheres in Leather Finishing:
1. Outstanding Filling Capacity:
– Expandable microspheres offer excellent filling capacity, effectively covering defects and imperfections in the leather surface .
– They can fill out cavities in hides and skins, enhancing the overall appearance and quality of the leather product .
2. Low Shrinkage Properties:
– Leather treated with expandable microspheres exhibits low shrinkage, ensuring dimensional stability and durability .
3. Improved Appearance of Aniline Leather:
– Expandable microspheres can enhance the appearance of aniline leather, providing a soft touch feel and a visually appealing finish.
4. Increased Yield and Uniformity:
– By filling out cavities in hides and skins, expandable microspheres help increase the yield of leather production and ensure uniform surface properties , .
The application of expandable microspheres in leather finishing offers a range of benefits, including improved appearance, enhanced properties, and increased efficiency in leather production. By incorporating expandable microspheres in stucco and base coats, leather manufacturers can achieve high-quality finishes and address imperfections effectively. For more information on the application of expandable microspheres in leather finishing, feel free to contact Waytop Microspheres using the provided contact details.
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