2results about How to "No surface defects" patented technology

The present invention discloses a preparation method for improving the thickness uniformity of molybdenum thin plates, belonging to the technical field of molybdenum thin plate preparation methods. The preparation method includes: setting two rollers with the same crown and both satisfying 1 / 15000 < tanθ < 1 / 9000 as the upper and lower rollers of a cold rolling mill, where tanθ represents the ratio of the difference d between the diameter at the center of the roll body and the diameter at the edge of the roll body to half of the roll length L / 2; adjusting the bending force and rotational speed of the cold rolling mill until its pressure gauge reaches 6 - 8 MPa, and rolling the cold-rolled semi-finished molybdenum plate through the adjusted cold rolling mill to obtain the finished molybdenum thin plate. The present invention can improve the thickness uniformity of molybdenum thin plates and reduce their surface defects under the condition of not changing the rolling process by coordinately adjusting the bending force of the rolling mill and the crown of the rollers, so as to meet the high-end application requirements.

The present application belongs to the technical field of printing materials, and particularly relates to a UV photocuring ink for silk screen printing of explosion-proof lines and a preparation method thereof. The ink takes epoxy acrylate resin as a main film-forming material, takes tripropylene glycol diacrylate as a flexible dilution monomer, cooperates with trimethylolpropane triacrylate as a rigid crosslinking monomer, takes 4-ethoxybenzophenone as a long-wavelength absorption type photoinitiator, and adds a composite additive compounded by a leveling agent, a defoaming agent and an antistatic agent in a specific proportion. The specific proportion of the bifunctional monomer and the trifunctional monomer constructs a network structure with a flexible main chain and moderate crosslinking, and the synergistic effect of the composite additive makes the cured coating have excellent bending flexibility while maintaining a high crosslinking density and surface hardness, has strong adhesion to paper fibers, has good fine line printing leveling, and has an antistatic function, which can effectively solve the problem of explosion lines at the folding part of paper packaging, and is suitable for explosion-proof line printing of various paper product packaging.