32results about How to "Improve physical performance indicators" patented technology

The invention relates to a novel thermoplastic elastomer composite self-adhesion sport field paving coiled material. The coiled material comprises a main body layer made of thermoplastic elastomer, wherein a creep deformation self-adhesion layer is arranged on the bottom surface of the main body layer, and the thermoplastic elastomer is prepared by blending and modifying ethylene propylene diene monomer rubber and polyolefin resin. The manufacture process comprises the steps of: blending the ethylene propylene diene monomer rubber, the polyolefin resin and naphthenic oil in proportion, and carrying out twin-screw extrusion, so as to obtain the thermoplastic elastomer; adding an assistant agent and the naphthenic oil, heating and carrying out high-speed stirring and blending, carrying out compound extrusion by utilizing a pin extruder, then carrying out knurling, overlap edge profiling, microwave foaming, vulcanizing and double-roll gluing, and carrying out crimping to prepare the novel thermoplastic elastomer composite self-adhesion paving coiled material after cooling. According to the novel thermoplastic elastomer composite self-adhesion sport field paving coiled material, the shortage of the prior art can be improved, the performance index of the product is improved, and the manufacture process is simple; the controllable thickness is 4-13mm, and the novel thermoplastic elastomer composite self-adhesion sport field paving coiled material is mainly applied to the fields of athletic tracks in sport fields, basketball courts, tennis courts, badminton courts and the like.

The invention belongs to waterproof material technical field in water conservancy and civil building engineering, and in particular discloses a macromolecule composite heat-resistance waterproof sheetused for production of waterproof coil and the preparation method. The technical proposal is that the invention consists of a middle layer consisting of polypropylene, HDPE and maleic anhydride grafting agent and surface layers consisting of linear polyethylene and HDPE bonded at two side surfaces of the middle layer; the macromolecule composite heat-resistance waterproof sheet is extruded and compounded by the middle layer and the surface layers at two sides of the middle layer; the physical performances of the formed waterproof sheet are greatly improved; by detection, the longitudinal andtransverse tensile strength is more than 300N / 50mm, namely, more than 500%; the perforation resistance reaches more than 80KN / m when the thickness is more than 0.5mm and reaches 30KN / m when the thickness is less than 0.5mm, thus meeting the engineering requirement.

The invention discloses a method for preparing an enhanced belt for nano SiO2 / PET enhanced RTP, wherein the method is characterized in that: the method uses filament bundle prepared by a nano SiO2 PET composite material as a start material, and orderly comprises the following steps of drawing-off, cabling and impregnating. The method has advantages of reasonable technology, good quality of finished product and low production cost, satisfies technology requirement for enhancing a RTP pipe, and provides powerful technology support for widely popularizing and utilizing the RTP pipe in the fields of petroleum exploitation and transport, sea exploitation, city common waterpipe and facilities for a field army.

The invention provides a purification method of a dry-type iron oxide powder solid. The method comprises the following steps of: (1) washing iron oxide powder with desalted water; (2) carrying out pressure filtration on the washed iron oxide powder mixed solution to separate solid and liquid while controlling a filtered water content not more than 30 percent; (3) predrying a mud cake obtained in the step (2) until the water content is smaller than 10 percent; (4) breaking; (5) drying in a drying furnace; and (6) grinding in a vibration ball mill. The method can be used for greatly decreasing the C1 (Chemical Index) of the iron oxide powder and improving the physical index BET (Brunauer, Emmett and Teller) and the consistency of the iron oxide powder so that the iron oxide powder can be used as a raw material of a high-end product, i.e. high-permeability ferrite.