63results about How to "Improve mechanical strength properties" patented technology

Hydrogels having improved elasticity and mechanical strength properties are obtained by subjecting a hydrogel formulation containing a strengthening agent to chemical or physical crosslinking conditions subsequent to initial gel formation. Superporous hydrogels having improved elasticity and mechanical strength properties are similarly obtained whenever the hydrogel formulation is provided with a foaming agent. Interpenetrating networks of polymer chains comprised of primary polymer(s) and strengthening polymer(s) are thereby formed. The primary polymer affords capillary-based water sorption properties while the strengthening polymer imparts significantly enhanced mechanical strength and elasticity to the hydrogel or superporous hydrogel. Suitable strengthening agents can be natural or synthetic polymers, polyelectrolytes, or neutral, hydrophilic polymers.

A toughening agent composition for increasing the hydrophobicity of an organosilicate glass dielectric film when applied to said film. It includes a component capable of alkylating or arylating silanol moieties of the organosilicate glass dielectric film via silylation, and an activating agent selected from the group consisting of an amine, an onium compound and an alkali metal hydroxide.

The invention discloses a chopped glass fiber sizing agent for reinforcing thermosetting resin, which is prepared by the components by weight percent: (1) 0.2-1.5% of coupling agent; (2) 3.0-20.0% of binding agent that is cross-linked polyurethane emulsion or the mixture of the cross-linked polyurethane emulsion and medium and high molecular weight epoxy emulsion, wherein the contents of the cross-linked polyurethane emulsion and the medium and high molecular weight elastic epoxy ester emulsion are based on the respective solid content; (3) 0.0-1.2% of lubricating agent; (4) 0.05-0.8% of antistatic agent; (5) 0.1-2% of pH value conditioning agent; and (6) the balance of deionized water, wherein the total weight of all the components is 100%. The chopped glass fiber sizing agent improves the bundling property of chopped glass fiber, reduces the broken filament, improves the mixing uniformity and the fluidity of the glass fiber and the BMC resin paste, and improves the mechanical strength and the appearance performance of BMC products.

A method of improving the mechanical strength of polyurethane foams made from bio-based polyols, the polyol-containing compositions utilized in the method of the invention, and the polyurethane foams produced by the method of the invention are provided. The method of the invention involves the incorporation of aromatic polyester polyol in the polyol-containing composition used to manufacture the foams. In one embodiment, the aromatic polyester polyol is utilized in a polyol-containing composition which is employed in the manufacture of flexible polyurethane foam. In another embodiment, the aromatic polyester polyol transesterified with a natural oil-containing composition to form a transesterification reaction product that is utilized in a polyol-containing composition which is employed in the manufacture of flexible polyurethane foam. Flexible polyurethane foams of the invention exhibit substantial improvements in mechanical strength properties, such as tear strength, tensile strength and elongation relative to foams made from bio-based polyols such as soybean oil-based polyols.

A calcium phosphate composition comprising at least one calcium phosphate mineral, at least one reaction retarding agent, at least one biding agent, and at least one sodium phosphate compound.

The invention provides an antistatic filtering cloth in the surface filtering mode for a dust collector. In a filtering cloth for a pulse blow swiping-off dust collector, the filtering cloth for the dust collector, which has numerous dust leakage after swiping off the dust, higher average outlet dust concentration, poor ventilation and dust swiping off performance and bad antistatic performance, is needed to be improved. The side of a soft material filtering surface made of fiber filtering cloth base materials such as non-woven fabric filtering cloth and the like used in the pulse blow swiping-off dust collector is laminated with a micro fine fibre layer formed by a nano carbon fiber with the conductivity, thereby the filtering cloth in the surface filtering mode for the pulse blow swiping-off dust collector, having excellent dust collecting performance and antistatic performance can be provided.

The invention discloses a glass fiber impregnating compound which is prepared from, by weight, 0.02-3.00% of a coupling agent, 3.00-30.00% of a film forming agent, 0.02-2.00% of a lubricating agent, 0.02-0.80% of an antistatic agent, 0.01-2.00% of a pH adjusting agent and deionized water. The film forming agent is prepared by mixing nanosilicon dioxide modified polyester emulsion, PVAc emulsion and polyurethane modified epoxy emulsion, and the content of the nanosilicon dioxide modified polyester emulsion is not smaller than that of the polyurethane modified epoxy emulsion. The invention further provides application of the glass fiber impregnating compound in producing twistless roving. The twistless roving produced through the impregnating compound is high in permeating speed, good in choppability, good in production smoothness and good in compatibility with enhanced resin, production efficiency and the mechanical strength of a produced composite product are greatly improved, and the glass fiber impregnating compound is applicable to an injection process or a centrifugal casting molding process.

The invention discloses a structure-enhanced SMC (Sheet Moulding Compound) glass fibre impregnating agent and application thereof in production of twistless roving. The impregnating agent is preparedfrom the following components: a coupling agent, a film forming agent, a lubricating agent, a pH value regulator and water, wherein the coupling agent is a silane coupling agent; the film forming agent is a mixture of non-cross-linked bisphenol A type polyester emulsion, cross-linked unsaturated polyester emulsion and medium-and-high molecular weight bisphenol A type epoxy emulsion. The inventionprovides the application of the impregnating agent in the production of twistless glass fibre roving for a structure-enhanced SMC sheet. The twistless glass fibre roving produced by using the impregnating agent has the advantages of low hairiness, high impregnation speed, high choppability, high production smoothness and high compatibility with enhanced resin, can greatly improve the mechanical strength of a glass fibre enhanced composite material product, and is suitable for an SMC moulding process.

The invention discloses a fire-retardant plastic and relates to the technical field of high-polymer materials. The fire-retardant plastic solves the problem of influence of non-uniform dispersion of existing metal oxides on fire-retardant effects. The fire-retardant plastic is composed of raw materials including polyethylene, polypropylene, polyphenylene sulfide, modified mica powder, modified calcium carbonate, montmorillonite, diatomite, coupling agent, flexibilizer, ultraviolet absorber, sodium phytate and fire-retardant agent. The invention also discloses a preparation method of the fire-retardant plastic. The prepared fire-retardant plastic is high in oxygen index but low in smoke density; by means of the modified mica powder, the modified calcium carbonate, the diatomite and the coupling agent, the flexibilizer, the ultraviolet absorber and the fire-retardant agent can be uniformly dispersed into the fire-retardant plastic along with filling of the modified mica powder, the modified calcium carbonate and the diatomite to further improve the fire-retardant performance; the sodium phytate and the montmorillonite can achieve good synergistic effects, the sodium phytate can modify the montmorillonite to endow the montmorillonite with thermal stability and compressive strength. Therefore, the fire-retardant plastic has a good market prospect.

An improved multilayer laminated microporous battery separator for a lithium ion secondary battery, and/or a method of making or using this separator is provided. The preferred inventive dry process separator is a tri-layer laminated Polypropylene/Polyethylene/Polypropylene microporous membrane with a thickness range of 12 μm to 30 μm having improved puncture strength and low electrical resistance for improved cycling and charge performance in a lithium ion battery. In addition, the preferred inventive separator's or membrane's low Electrical Resistance and high porosity provides superior charge rate performance in a lithium battery for high power applications.

The present invention relates to an improved process for processing chemical cellulose pulp wherein carboxymethylcellulose (CMC) is added during the bleaching step of said pulp. The addition of CMC in this step of the bleaching process provides a pulp with improved physical, chemical and mechanical properties.

The invention discloses a pipe body flat clamp for spacing, limiting, fixing and clamping a pipe body. The pipe body flat clamp comprises a pipe clamping seat and a pipe body pressing plate formed by adopting an SMC composite material through die pressing, wherein limiting grooves and fixing seats are arranged on the pipe-separating center plate of the pipe clamping seat at intervals; pipe bodies to be fixed are arranged among the limiting grooves and the pipe body pressing plate respectively; the pipe body pressing plate is connected with the pipe clamping seat through fastening components, so that the separated limiting and reliable pressing of the pipe bodies to be fixed are realized, and the virtual pressing of the pipe bodies are eradicated. According to the pipe body flat clamp, as the pipe clamping seat is designed into the support structure consisting of the pipe-separating center plate and a fixing baseplate, the limiting grooves for accommodating the pipe bodies to be fixed are formed in the pipe-separating center plate, fixing seats are arranged at the two ends of the pipe-separating center plate, fixing screws are embedded into the fixing seats, the fixing baseplate is fixed onto a wall, and the pipe body pressing plate is mounted on the screws in a sleeving manner and is tightened through nuts, the clamp adopting the structure is convenient to disassemble, and extremely convenient; moreover, as the pipe clamping seat and the pipe body pressing plate adopting the composite material are formed through the die pressing, the pipe body flat clamp is good in mechanical strength property, thermal stability property, corrosion resistance property and cold resistance property, and is long in service life.

The invention discloses a method for manufacturing a polyphenylene sulfide composite film. The method comprises the following steps of: performing polycondensation under the action of an alkaline metal cosolvent by taking sodium sulfide and paradichlorobenzene as raw materials and N-methyl-2 pyrrolidone as a solvent so as to produce a polyphenylene sulfide resin, wherein the molar ratio of the sodium sulfide and the paradichlorobenzene is 1:1; and synthesizing polyphenylene sulfide under a certain condition, refining, purifying, washing and drying the polyphenylene sulfide to obtain the polyphenylene sulfide resin, adding a mixture comprising 1.5 to 0.9 percent of heat stabilizer, 8.5 to 4.1 percent of organic elastomer and the like into 90 to 95 percent of resin, extruding and pelletizing by a double-screw extruder, drying and performing a film preparation process so as to obtain a polyphenylene sulfide resin film. The film obtained by the method can be widely applied to fields such as electronic and electric products, war industry, space flight and aviation, machinery, chemical industry and the like.

The invention discloses a making method of two-layer embedded artificial seeds of orychophragmus violaceus, and belongs to the field of biotechnology and agricultural engineering. The method comprises the steps of bud cluster inducing of the orychophragmus violaceus, bud propagation and cultivation and bud embedding and artificial seed capsule preparation; in the bud embedding and artificial seed capsule preparation process, an endopleura embedding solution is sodium alginate hydrosol which contains nano-titanium dioxide nTiO2, NAA, an MS medium and saccharose and has the mass concentration of 6%, and a testa embedding solution is a sodium alginate hydrosol which contains nano-titanium dioxide nTiO2 and nano-silicon dioxide nSiO2 and has the mass concentration of 7% or 8%. According to the made artificial seeds, a bactericide and nutrient substances can be separated through a two-layer embedding technology, and meanwhile the mechanical strength of endopleura and testa is adjusted; the artificial seeds have the advantages of being high in rooting and sprouting rate, low in contamination rate, low in toxic action on explants and the like in a bacterial environment; by means of the two-layer embedding technology, the making technology of the artificial seeds of the orychophragmus violaceus can be further pushed to practical production and application.

The invention discloses a graphene modified ceramic tile and a preparation method thereof. The graphene modified ceramic tile comprises a green body and a glaze surface smeared on the outer surface ofthe green body, wherein the green body comprises 0.3 to 1 part by weight of graphene chelated titanium ions, 0.5 to 2 parts by weight of medical stone and 20 to 90 parts by weight of kaolin. By introducing the graphene chelated titanium ions into the ceramic tile, on the premise of not influencing the calcination whiteness of the ceramic tile, the mechanical strength property of the ceramic tilecan be effectively improved.

A dielectric structure (10) for an electric wire or cable, presenting an inner hollow cylindrical body (2) and an outer hollow cylindrical body (3), said bodies (2, 3) being coaxial and being connected together by a plurality of spacers (4a, 4b, 4c, 14). The main characteristic of a dielectric structure is that each spacer (14) is constituted by a first curved wall (15) and by a second curved wail (16) that is curved in the opposite direction relative to a radial plane interconnecting the two bodies (2, 3), the walls (15, 16) having at least one intersection zone (17), two successive spacers (14) being in contact with each other.

The invention belongs to the technical field of plastic materials, and concretely relates to a post-treatment method for an MC nylon material. The temperature of a movable oven and the starting temperature of a slow cooling device are all designed in a range of 150-190 DEG C, and the temperature range is close to the maximum temperature of polymerization of MC nylon and the temperature required for crystallization, so an MC nylon blank material has a certain temperature condition to continuously complete the crystallization process; the crystallization process of the MC nylon blank material isa slow process from heat absorption to heat release, and a corresponding slow cooling condition must be set to crystallize the MC nylon blank material completely and make crystals regularized, and slow cooling is carried out for several hours to 100 DEG C or less to meet the condition, so the obtained MC nylon composite material has stable high mechanical strength and good toughness; and the lowly cooled MC nylon composite material can be aged for several days to ensure the stability of the finish size, so the processing precision of the product is ensured, and the production efficiency is guaranteed.

The invention relates to the technical field of elevator nylon wheels, in particular to an elevator nylon wheel machining process. The machining process comprises the machining flows of fusion of caprolactam-weighing-forvacuum-adding of quantitative NaOH pigment-vacuumizing-centrifugal casting and mold heating-mold release-blank heat treatment-machining of finished products-inspection and warehousing; in the centrifugal casting, a solid curing agent MSCP2013 is added; in the blank heat treatment process, cast nylon wheels are dipped in an oil-state medium; and the machining of finished products only comprises the steps of grooving of blanks-rough turning-finish turning-turning of rope slots-turning of snap spring grooves-chamfering-inspection. The elevator nylon wheel machining process replaces a traditional process; and the whole service performance of products is largely improved.