4results about How to "Flat and dense surface" patented technology

This invention relates to the field of interior decoration materials, specifically to a paper-based tear-resistant substrate and its preparation method. A method for preparing a paper-textured tear-resistant substrate includes the following steps: S1: preparing a paper-textured slurry; S2: applying the paper-textured slurry to the surface of a non-woven fabric substrate in multiple steps; S3: heating and shaping with a pressure roller, and cooling to obtain a composite substrate; the paper-textured slurry, by weight, includes: 20-30 parts of water-based acrylic resin emulsion, 10-15 parts of water-based polyurethane emulsion, 1-8 parts of modified starch adhesive, 15-25 parts of kaolin, 10-15 parts of heavy calcium carbonate, 5-10 parts of titanium dioxide, 3-5 parts of shell powder, 0.5-2 parts of nanocellulose, 0.5-1 part of dispersant, 0.1-0.5 parts of polyether-modified organosilicon, and water, wherein the amount of water added makes the solid content of the paper-textured slurry 35-50%; the obtained substrate has a paper-textured feel, which facilitates ink adhesion and high-precision printing, and has good tear resistance.

The utility model relates to a bag manufacturing technology, and particularly provides a foldable bag. According to the technical scheme, the device comprises a base body frame made of a flexible lining material, and the surface of the base body frame is provided with preset creases; the flexible coating layer covers the outside of the matrix frame, and the top of the flexible coating layer is provided with an openable pocket opening; the two groups of symmetrical tightening systems are connected with the upper and lower corners of the coating layer; when the tightening system is tightened, the matrix frame forms a three-dimensional rectangular frame, and the corners exceed the frame; when the tightening system is loosened, the frame is folded into a compact state, and the corners are folded inwards. According to the scheme, a bearing state and a folding state can be quickly switched, and the folded film is thin and flat in surface.

This invention relates to the field of polymer materials technology, specifically disclosing a low-roughness polyvinylidene fluoride (PVDF) tube, its preparation method, and its applications. The raw materials for preparing the PVDF tube include polyvinylidene fluoride resin and a nucleating agent, wherein the mass of the nucleating agent accounts for 0.02% to 0.75% of the mass of the polyvinylidene fluoride resin. The raw materials for preparing the PVDF tube of this invention include polyvinylidene fluoride resin and a very small amount of nucleating agent. The introduction of this very small amount of nucleating agent refines the grain size of polyvinylidene fluoride, improves the crystallinity of polyvinylidene fluoride, and significantly reduces the surface roughness of the PVDF tube, making the surface of the PVDF tube smoother and denser.

The invention belongs to the field of chemical plating, and particularly discloses a chemical reduction gold plating solution. The chemical reduction gold plating solution comprises, by mass concentration, 2-6 g / L of gold salt, 0.02-0.08 g / L of a stabilizer, 5-10 g / L of a complexing agent, 2-8 g / L of a reducing agent, 1-4 g / L of a homogenizing agent and 0.06-0.12 g / L of a composite inhibitor. The composite inhibitor is prepared from pentaethylene glycol dimethyl sulfonate and beta-alanine benzyl ester p-toluenesulfonate. The chemical reduction gold plating solution has excellent gold cylinder stability, the solution is still clear and free of sediment after being used for 8 months, and a gold plating layer prepared through the chemical reduction gold plating solution is bright, free of color difference and gold bumps on the surface, compact and flat in surface, free of folding plating cracks and small in thickness range; and the use requirements of gold plating of high-precision electronic devices can be met.