3results about How to "Strong use stability" patented technology

The invention discloses a polyurethane emulsion for UV (ultraviolet) ink-jet digital printing as well as a preparation method and application of the polyurethane emulsion. The preparation method of the polyether type polyurethane emulsion comprises the following steps: adding polyether polyol, isocyanate, a catalyst and polyfunctional group acrylate into an organic solvent, mixing and uniformly stirring, heating to a first temperature, and stirring for reaction to obtain a polyether type polyurethane solution; and cooling to a second temperature, sequentially adding deionized water, adjusting the pH value, and uniformly mixing to obtain the water-based polyether polyurethane emulsion. The low-polarity polyether polyurethane is selected as a main body material, the polyfunctional group acrylate is introduced to increase the binding force between the ink and the main body, the compatibility among the components can be improved, the leveling property of the UV ink can be improved, a high-quality cured film layer can be formed without additionally adding a leveling agent, the internal stress during UV curing film forming is reduced, and the UV curing film forming quality is improved. Therefore, surface defects such as white points and pinholes caused by shrinkage of film holes in the UV curing process are avoided.

The utility model discloses a foldable fire extinguisher box which comprises a base and a foldable box body, the foldable box body is arranged above the base, lower end plates are fixedly connected to the two ends of the lower portion of the base, and lower side plates are fixedly connected to the two sides of the lower portion of the base. The two sides of the bottom of the base are each fixedly connected with two rotating shaft seats, and the bottoms of the two sides of the base are each rotationally connected with a rotating support through the two rotating shaft seats. The rotating support and the wheel body are matched with the extension spring and the limiting mechanism, the wheel assembly can be folded to the lower portion of the base during transportation and long-time placement, and the storage and transportation space is reduced under the condition that it is guaranteed that the overall trafficability is enhanced through the large-diameter rolling wheels.

This utility model discloses a down standard sieve, including a base and a support plate. By employing a support plate and a limiting plate, the standard sieve can be placed into the receiving slot of the support plate before use. Rotating the support plate allows for the stacking of multiple standard sieves. After rotation, the support plate is fixed to the limiting plate via a surface connector, preventing detachment during operation and ensuring stability. Furthermore, there are no direct interlocking operations between the multiple support plates. Therefore, when needing to retrieve or place standard sieves in different positions, only the corresponding support plate needs to be rotated, without affecting other unused standard sieves. This effectively reduces the impact during retrieval and ensures optimal performance. The fixed position of the support plate also reduces the difficulty of stacking the standard sieves, offering advantages such as low stacking difficulty, high stacking stability, and minimal impact during retrieval.