Evonik's Silica Applications in Textile Coatings
Release time:
2022-07-04
In addition to excellent matting properties, Evonik's silica matting agent also has excellent dispersibility. Therefore, it is widely used in the textile industry, including textile coatings, printing pastes, PU films and other fields, such as the classic model ACEMATT® OK 412.
Evonik's ACEMATT® product series of matting agents are divided into two categories, namely precipitated silica matting agents and fumed silica matting agents. Both products are synthetic amorphous white fluffy powders. Compared with precipitated silica, fumed silica is more fluffy. HK represents precipitated silica without surface treatment (such as ACEMATT® HK 440), OK represents precipitated silica with wax surface treatment (such as ACEMATT® OK 412), TS represents fumed silica without surface treatment (such as ACEMATT® TS 100), and the 3000 series (such as ACEMATT® 3300/3400/3600) is specially surface treated by the same process. All ACEMATT® products have a narrow particle size distribution, thus showing excellent dispersibility.
The main functions of silica matting powder in textile coatings are matting, anti-adhesion, improving hand feel and waterproof and breathable performance. The models involved include ACEMATT®OK 412, 790, 3600, TS100, etc. The relevant features are as follows:
At present, the silica matting powder used by Evonik for waterproof and breathable coatings is mainly ACEMATT® OK 412 and ACEMATT® TS 100, of which ACEMATT® TS 100 has better moisture permeability and breathability. This is because the silica matting powder is evenly distributed in the coating, forming a microporous structure in the coating, which improves the moisture permeability and breathability. This has a lot to do with the production process, particle size, microstructure and shape of the silica matting powder. The microporous structure of the coating containing ACEMATT® TS 100 is more uniform and compact, thus showing better moisture permeability and breathability.
For silica matting agents for textile coatings, Evonik provides multiple options based on performance requirements and cost-effectiveness. For example, when better anti-adhesion performance is required, ACEMATT® 790 with a larger particle size than ACEMATT® OK 412 or even ACEMATT® 810 with a larger particle size can be selected. For thin coatings on light fabrics, ACEMATT® 3600 with a smaller particle size and a more delicate and smooth feel is more advantageous than ACEMATT® OK 412. When silica with better moisture and air permeability than ACEMATT® OK 412 is required, ACEMATT® TS 100 is the best choice.
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