5results about How to "Strength has" patented technology

The invention discloses a preparation method of high-temperature-resistant high-strength dealcoholized single-component room-temperature vulcanized silicone rubber. The high-temperature-resistant high-strength dealcoholized single-component room-temperature vulcanized silicone rubber is prepared from 30-90 parts of self-made masterbatch; 2-10 parts of a cross-linking agent; 30-60 parts of a filler; 1-10 parts of a catalyst; the self-made rubber master batch is prepared by treating 10 to 200 parts of fumed silica with 1 to 20 parts of silazane in 10 to 100 parts of dimethyl silicone oil and then adding 10 to 1000 parts of dihydroxy polydimethylsiloxane. According to the preparation method of the high-temperature-resistant high-strength dealcoholized single-component room-temperature vulcanized silicone rubber, the self-made masterbatch is used as a basic polymer, so that the rubber body can obtain very high mechanical property.

The invention provides a post-crosslinking PMMA (polymethyl methacrylate) waterproof coating and a preparation method thereof. The post-crosslinking PMMA waterproof coating comprises a component A and a component B, wherein the component A comprises optional additives and the following raw material components in parts by weight: 20-50 parts of PUA resin, 30-60 parts of a reactive diluent and 4-10 parts of a reducing agent; wherein the PUA resin is obtained by reacting oligomer polyol, polyisocyanate, a chain extender, a hydroxyl acrylate monomer and an end-capping reagent under the condition of a polymerization inhibitor, the ratio of the amount of substance of-NCO in the polyisocyanate to the amount of substance of-OH in the oligomer polyol is 1.1-1.5, the chain extender has a structure as shown in formula 1: # imgabs0 # R1, R2, R4 and R5 are independently selected from hydrogen or C1-C5 alkyl, R3 is selected from C1-C5 alkyl, and R4 is selected from hydrogen or C1-C5 alkyl. And the component B comprises 15-30 parts of a peroxide oxidant.

This invention relates to the field of bathing aids technology and discloses an improved shower chair structure, including a chair frame assembly, a seat, a backrest, and armrest assemblies. The chair frame assembly is formed by hinged front and rear frames, and a load-bearing structure for mounting the seat is provided between the chair frame assemblies. The load-bearing structure includes a first pivot support at the hinge of the front and rear frames and a second pivot support composed of a first load-bearing column, a second load-bearing column, and a connecting rod. One end of the connecting rod is pivotally connected to the seat by a bolt, and the other end is fitted onto the first load-bearing column. The top end of the connecting rod is placed in a connecting rod limiting groove, and the connecting rod also has a pointed protrusion that abuts against the end of the connecting rod limiting groove when folded. This solves the technical problem in the prior art that shower chairs cannot stand freely after folding and sometimes open on their own, causing safety issues. It provides a new shower chair structure that is simple in structure, low in cost, ergonomically designed, sturdy in support, safe and stable in opening and closing, and healthy and comfortable.

The air indirect evaporation refrigeration core comprises a plurality of heat exchange plates and a plurality of blocking pieces, the heat exchange plates are arranged at intervals in the first direction, and the blocking pieces are arranged on the surface of the heat exchange plate on one side in a heat exchange channel at equal intervals and divide the surface of the heat exchange plate into a plurality of heat exchange cavities. A plurality of water storage grooves are formed in the heat exchange chamber at equal intervals; the heat exchange channels are converted into dry channels through the equally-spaced blocking pieces in the second direction, the heat exchange channels are converted into wet channels through the equally-spaced blocking pieces in the third direction, the third direction is perpendicular to the first direction and the second direction, and the dry channels and the wet channels are arranged in a staggered mode; the heat exchange plate is formed at a time through plastic uptake, the functions of efficiency, strength and the like are achieved through the concave-convex structure design, the dry channels, the wet channels, the blocking pieces, the protrusions and the water storage grooves, performance optimization is achieved, and the sealing performance and the overall strength of the core body are improved through the edge sealing technology, the silica gel sealing technology and the like.

This utility model discloses a combined extrusion die for aluminum alloy profiles, belonging to the field of aluminum alloy profile die technology. It includes an extrusion die and a forming tube. Fixed plates are fitted at both ends of the forming tube. Connecting ears are provided at the corners of the fixed plates and the extrusion die. Fins, flush with the edges of the fixed plates, are evenly spaced on the surface of the forming tube. Extrusion strips are provided on the inner wall of the forming tube. By evenly spaced fins on the outer side of the forming tube, the tube's strength is enhanced while the high temperature transmitted from the material to the forming tube is quickly dissipated outwards, causing the temperature of the material moving inside the forming tube to decrease accordingly. This gives the material a certain strength within the forming tube. Simultaneously, the extrusion die and forming tube form the material in two stages, allowing for segmented processing of the material. This distributes the pressure generated during processing, preventing the material from rapidly losing temperature and pressure after leaving the processing area, thus avoiding deformation.