First, the safety of sports floor coating
The slip resistance of the coating is not the better the coefficient of friction is. The friction coefficient is too large, the ground will be very astringent, the athlete will get an ankle injury due to sliding difficulties; when the friction coefficient is too small, the athlete cannot control the ground. Sliding, easily slipping and hurting your knee. Therefore, the coefficient of static friction of the coating should be in a suitable range. In the ASTM standard, it is specified that the coefficient of static friction coefficient of sports wood floor coatings is 0.5 or more.
The authors have found for many years that the amount of polyethylene wax dispersion in the blended product can be used to set the static friction coefficient within a certain range. Figure 3 shows the microstructure of the coated membrane surface. The tiny particles are polyethylene wax dispersions. Because the molecular weight of polyethylene is relatively small, “drift†occurs during film formation and is concentrated on the surface of the coating. The surface structure of this coating has a very positive effect on controlling the static friction coefficient of the surface, and the wax in the product is formulated. The amount of dispersion can flexibly control the coefficient of static friction of the coating.
When the wax content in the product was 0% and 5%, respectively, the static friction coefficient of the coating film was determined to be 0.47 and 0.58 on a PVC substrate by an ASTM (James Machine) method. Taking into account the anti-slip properties and other properties of the coating, the coating may be prepared with the appropriate wax content, and the static friction coefficient meets the standard. In the same way as the DIN 18032 method, the sliding friction coefficient of the products developed on sports wood flooring substrates is shown in Table 1, all within the range of 0.4 to 0.6 as required by the standard.
Second, the movement of the surface coating characterization
Emulsion as the core material, adding wetting agents, stabilizers, filming additives, leveling agents, plasticizers, polyethylene wax emulsion, defoamers and other compounded into a bright film sports wood floor coating.
Third, engineering application examples
The application of the coating can not only protect the athletes and prolong the life of the ground, but also has a very good decorative effect. The floor after applying the coating usually has good anti-slip performance, soft feeling of the feet (no stiff feeling of paint), no sports fatigue and damage, good visual feeling (no strong or dazzling reflective effect, no Athletes cause visual fatigue and good TV broadcast results.
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One full set of kitchen room furniture usually consists of Island Cabinet, base cabinet, Wall Cabinet, pantry cabinet (Tall Cabinet).
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