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 discloses a preparation method of an environment-friendly melamine-based foam plastic. First, add melamine, paraformaldehyde and water into the reactor, and add modified monomers to adjust the pH value of the solution, and then heat the reaction with steam; after the reaction, add aldehyde-removing functional monomers and continue to stir the reaction to obtain volatile low-formaldehyde Melamine-based resin; add emulsifier, compound curing agent and foaming agent to the auxiliary reaction kettle in sequence and mix well to obtain mixing auxiliary; cool down the temperature of the obtained resin, and then enter the twin-screw machine by metering and mixing auxiliary at the same time. High-speed emulsification, microwave foaming after emulsification, to obtain melamine-based foam M1; finally, the melamine-based foam M1 is dried by superheated steam and microwave drying in sequence, and an environmentally friendly melamine-based foam plastic product is obtained after drying. The invention realizes the industrialized production of zero-formaldehyde-releasing melamine-based foam plastic products, and solves the key indicators of the industrialization of the melamine-based foam plastic and the bottleneck of environmental protection and safety technology.

The invention provides an elastomer composite sludge discharging rubber pipe and a production process thereof. The elastomer composite sludge discharging rubber pipe is mainly composed of a cord fabric layer, a tightening steel wire, a rubber pipe outer layer and a flange steel short sleeve, an intermediate layer which is a canvas layer is arranged on the inner surface of the cord fabric layer of the sludge discharging rubber pipe, and a composite layer is arranged on the inner surface of the intermediate layer and made of polyurethane materials or polyurea materials. After a pipe blank is prepared, the elastomer composite sludge discharging rubber pipe is made by respectively adopting a pouring forming process, a centrifugation forming process or a spraying forming process. Due to omission of inner-layer rubber of existing sludge discharging rubber pipes, vulcanization time of the pipe blank of the sludge discharging rubber pipe is shortened; a single-face rubber lining process is adopted to the intermediate canvas layer, so that bonding strength of an elastomer and the cord fabric layer is improved; and a special support is designed and used in the processes of centrifugation and spraying, so that the problem of deformation of a pipe body during manufacturing is solved and thickness uniformity of the composite layer is guaranteed.

The invention provides a transparent solvent-free single-component waterproof paint and a preparation method thereof. The transparent solvent-free single-component waterproof paint comprises the following raw materials in parts by weight: 30-45 parts of combined polyether polyol, 10-20 parts of isocyanate, 0.01-0.02 parts of a polymerization inhibitor, 10-20 parts of a plasticizer, 0.1-0.2 parts of a wetting dispersant, 0.04-0.08 parts of a catalyst, and 0.1-0.3 parts of a carbon dioxide inhibitor. According to the invention, the environmental protection raw materials substitute toxic solvents, a reaction-type antifoaming agent is employed for preparing the high-solid content environment-friendly type transparent solvent-free single-component waterproof paint, and the waterproof paint has the advantages of excellent coating performance, low cost, safety, environmental protection, and non pollution.

The invention discloses a modified foaming process for reclaimed materials of a multilayered co-extruded polypropylene core layer. The modified foaming process comprises the following step: extruding an upper-layer intensified sheet material through a first screw rod extruder; and extruding an intermediate foaming sheet material through a second screw rod extruder; extruding an upper-layer intensified sheet material through a third screw rod extruder; and compounding the upper-layer intensified sheet material, the intermediate foaming sheet material and a lower-layer intensified sheet material to form a composite foaming sheet material. The modified foaming process is simple and easy to carry out; the polypropylene foaming materials can be circularly utilized, the energy conservation and the environmental protection are realized, and all physical property indexes of the polypropylene foaming materials are improved.

The invention relates to a method for preparing a quinary P-type hard alloy. The quinary P-type hard alloy consists of the following components in percentage by weight: 16 percent of hard-phase titanium carbide, 8 percent of tantalum carbide, 6 percent of niobium carbide, 10 percent of cobalt, 0.006 percent of lanthanum, and the balance of hard-phase tungsten carbide. The preparation method comprises the following steps: mixing the components, wet-milling the mixture by a tilting wet mill, and discharging the mixture after wet-milling; and waxing and pelletizing the mixture through spray drying, pressing the mixture to form a shape by an automatic press, sintering the mixture in vacuum, and tempering the mixture to obtain a sintered finished product. The product prepared by the method hashigh bending strength, good impact strength and good red hardness; and when the product is coarsely processed into a large-size alloy forged piece, a cutter is not driven during use, the processing efficiency can be properly improved, and the service life of the cutter is long.

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.