48results about How to "Play the role of filling" patented technology

The invention relates to cardboard, and discloses a composite corrugated cardboard, comprising a face paper layer, a corrugated core layer and an inner paper layer, and the corrugated core layer includes a plurality of supporting paper blocks between the inner paper layer and the face paper layer and supplementary paper blocks There is a supplementary channel between the supporting paper blocks, and the supplementary paper block slides in the supplementary channel, and the middle part of the supplementary paper block protrudes to form an abutment end, and the abutment end abuts between the inner paper layer and the surface paper layer, supporting One end of the paper block extends toward the supplementary channel to form a leading end, the side of the leading end is bent inward and abuts inside it, the side of the leading end is in contact with the side of the abutting end, and the distance between adjacent leading ends is less than the maximum of the supplementary paper block The minimum width of the section; if a part of the composite corrugated cardboard is crushed by external force, squeeze the supplementary paper blocks next to this part, let the supplementary paper blocks fill into the crushed part, let the part bulge, and the supplementary paper blocks in other parts will be in order Fill the gap and realize self-healing after partial damage.

The invention relates to a polypropylene material and a preparation method thereof, especially to a polypropylene micro-foamed material with high surface quality and a preparation method thereof, belonging to the technical field of high-molecular materials. The polypropylene micro-foamed material comprises the following raw materials by weight: 50 to 80 parts of polypropylene, 10 to 40 parts of inorganic powder, 3 to 10 parts of a micro-foaming adjusting auxiliary agent, 0.5 to 5 parts of a foaming agent and 0.2 to 2 parts of an anti-oxidant. Through the micro-foaming adjusting auxiliary agent, surface quality of the polypropylene micro-foamed material is substantially improved, the severe surface quality problems like surface scratches and gas marks on a polypropylene micro-foamed product in the process of injection molding are overcome, and the polypropylene micro-foamed material with excellent performance and high surface quality is obtained. The prepared polypropylene micro-foamed material is applicable to skinned and fabric-covered automobile components and to interior and exterior trimming parts for an automobile in a visual environment, e.g., door trim panels, guard boards of columns, hallstands, instrument desks, air-conditioner shells, guard boards for side skirts, scuff plates, thereby realizing lightweighting of materials for automobile parts; and the material is also applicable to other fields like architecture, electronics and shipbuilding.