摘要:
A polymeric netting including polymeric ribbons and polymeric strands. Each of the polymeric ribbons and strands has a length and width, with the length being the longest dimension and the width being the shortest dimension. The polymeric ribbons have a height-to-width aspect ratio of at least five to one, a major surface that is intermittently bonded to only one polymeric strand, and a height greater than the height of the one polymeric strand. An extrusion die and method useful for making the polymeric netting are also disclosed.
摘要:
Polymeric layer having first and second, generally opposed major surfaces, comprising an array of openings extending between the first and second major surfaces. The polymeric layers are useful, for example, as components in personal care garments such as diapers and feminine hygiene products. They can also be useful for filtering (including liquid filtering) and acoustic applications.
摘要:
Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
摘要:
An integral polymer grid with a plurality of interconnected, oriented polyethylene terephthalate strands and an array of openings therein is made from a polyethylene terephthalate sheet-like starting material having holes or depressions therein that form the openings when the sheet-like material is uniaxially or biaxially stretched. The grid has a higher tensile strength to weight ratio and a higher creep reduced strength to weight ratio than corresponding ratios associated with a grid made from a non-polyethylene terephthalate starting material.
摘要:
A method of forming a ventilated structural panel having a top sheet, a bottom sheet, and a plurality of spacing structural elements arranged in a matrix that fixedly attach the top sheet to the bottom sheet, the method comprising forming the matrix in a mold form attaching the matrix to the first and the second sheet.
摘要:
A reticular tubular structure formed by extruded filaments of synthetic plastic material extending in two oppositely tilted directions with respect to an axial direction of the tubular reticular structure. The filaments cross one another to form a tubular net of interconnected rhomboid meshes, vertices of the rhomboid meshes being formed by crossover points between two filaments fused together, while sides of the rhomboid meshes are formed by said filaments outside the crossover points. The tubular reticular structure is molecularly oriented in both longitudinal and transverse directions thereof, and is calendered so that the crossover points, at the vertices of the rhomboid meshes, and the filaments, at the sides thereof, have the same common thickness.
摘要:
An O-ring filter seal includes an annular sealing portion having a first thickness, a circular mesh filter, and an inner portion formed integrally with the annular sealing portion and disposed radially inwardly relative to the annular sealing portion. The inner portion is molded onto a peripheral edge of the circular mesh filter and has a second thickness that is less than the first thickness.
摘要:
A method of making a mechanical fastening net. The method includes providing a net having strands of polymer and open areas between the strands of polymer and molding a portion of the polymer in the strands of the net into upstanding posts to form the mechanical fastening net. A mechanical fastening net that includes a polymeric backing, a plurality of openings in the polymeric backing, and upstanding posts on at least one of the first or second major surface of the polymeric backing is also disclosed. The polymeric backing has a range of thicknesses ranging from minimum to maximum thickness, and for at least a portion of the polymeric backing, the minimum thickness of the polymeric backing is where it abuts one of the openings.
摘要:
Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
摘要:
A plastic barrier screen that is molded and drawn; the screen is formed from a process that uses the speed of injection molding to form a part that can be mechanically oriented in a second operation that is equally fast. The plastic barrier screen is first formed from injection molding a part with multiple square or hexagonal holes ½ to ⅙ opening size in a uniform pattern, including longitudinal dividers between such holes of 2 to 6 times the final desired screen barrier cross sectional area of the longitudinals respectively. The molded part is then stretched along the longitudinal elements of the mold to molecularly orient at elevated temperature to produce a larger planar dimension of 2 to 6 times the original plastic screen with high strength molecularly oriented monofilament longitudinal elements.