Abstract: A sealing disc for vacuum closure suitable for using in reciprocating movement to an open position or a closed position to open or seal a valve port of an all-metal valve is disclosed. A sealing plate of the sealing disc is formed with a first sealing surface. When the sealing disc is in the closed position, the first sealing surface directly abuts against the valve port of the all-metal vacuum valve. A vacuum sealability can be improved and a service lifetime can be prolonged through compensating movement and adjusting movement between two metallic sealing surfaces abutting each other.

Abstract: A vacuum mold includes a mold body with a molding surface. The mold body defines a plurality of extraction holes. Each extraction hole includes a first hole portion, a second hole portion, and a connecting portion connecting the first hole portion and second hole portion. The first hole portion is adjacent to the molding surface, and a diameter of the first hole portion is smaller than a diameter of the second hole portion.

Abstract: A vacuum mold includes a mold body with a molding surface. The mold body defines a plurality of extraction holes. Each extraction hole includes a first hole portion, a second hole portion, and a connecting portion connecting the first hole portion and second hole portion. The first hole portion is adjacent to the molding surface, and a diameter of the first hole portion is smaller than a diameter of the second hole portion.

Abstract: A packaging material is provided which includes a substrate (11) and a cushioning layer (13) formed on one surface of the substrate. The substrate consists of polystyrene and additives. The cushioning layer is made of silica gel. The present packaging material has better shock absorption performance. A method for making such package material is provided.

Abstract: A packing laminate (100) includes a main layer (10) and a resin film (20). The main layer is advantageously made of polystyrene. The resin film is usefully made of polyethylene. The resin film is formed on a surface of the main layer. Due to the excellent durability of the polyethylene, the packing laminate, overall, has excellent surface wear characteristics and impact resistance, and such a layer of polyethylene can prevent particles in the main layer from otherwise being scraped/abraded off therefrom.