34 results about "Alkali free" patented technology

The present application relates to the technical field of industrial control system, especially to a felt making machine control method and system for producing alkali-free glass fiber soft felt, comprising full-process multi-parameter real-time acquisition, reverse deduction of the processing effect of the previous link, two-way parameter closed-loop adjustment, backlight image acquisition, multi-camera cooperative calibration acquisition, hierarchical image analysis processing, time sequence anomaly verification and defect grading processing; the present application synchronously deploys laser thickness measurement and image detection devices in all key processing links of felt production, realizes real-time continuous acquisition of full-node quality parameters, simultaneously reversely deduces the actual processing effect of the previous link based on a process parameter mapping model, constructs a two-way closed-loop control mechanism of forward adjustment of subsequent link process parameters and reverse feedback optimization of processing parameters of the previous link, can timely discover and accurately correct in the early stage of quality deviation, and significantly improves the stability of product quality and the controllability of the production process.

This invention provides a soft thermally conductive silicone material, belonging to the field of thermally conductive silicone. It includes a heat dissipation layer, an insulating layer glued to the upper side of the heat dissipation layer, and a pressure-resistant layer glued to the upper layer of the insulating layer. The dispersed graphene structure ensures effective heat dissipation both internally and externally, rapidly dissipating conducted heat. The boron nitride insulating layer provides efficient insulation, preventing conductivity upon chip contact and improving safety. The pressure-resistant layer, composed of fine glass fibers and with alkali-free glass fibers as a support, enhances tear resistance and mechanical strength. The elastic structure of the soft silicone layer further improves overall strength and tear resistance, preventing tearing of the material itself. A flame-retardant layer composed of silica increases the flame-retardant effect of the thermally conductive silicone. A pressure-sensitive adhesive layer ensures stable adhesion and fixation between the thermally conductive silicone and the chip.

This invention belongs to the field of glass substrate technology, specifically relating to an alkali-free glass substrate and its preparation method, comprising the following raw materials: SiO2, Al2O3, MgO, CaO, BaO, SrO, and B2O3 / C composite microparticles. B2O3 and C are dispersed by laser irradiation ablation combined with microwave and stirring to form uniform and dense nanoparticles. The B2O3 / C composite microparticles significantly improve the clarification effect and reduce the coefficient of thermal expansion. This not only reduces shrinkage deformation during molding but also suppresses flexural deformation during subsequent processing, and increases Young's modulus and specific modulus, which is beneficial for manufacturing thinner and lighter liquid crystal displays. Furthermore, the B2O3 / C composite microparticles coated with silica provide better clarification with a lower content, resulting in an alkali-free glass substrate with a lower coefficient of thermal expansion and higher Young's modulus and specific modulus.

The present invention provides an alkali-free glass sheet, including as a glass composition, in terms of mol %, 64% to 71% of SiO2, 12.5% to 17% of Al2O3, 0% to 4% of B2O3, 0% to 0.5% of Li2O+Na2O+K2O, 6% to 11% of MgO, 3% to 11% of CaO, 0% to 6% of SrO, 0% to 1% of BaO, and 14% to 19% of MgO+CaO+SrO+BaO, and having a mole percent ratio (Al2O3 / CaO)×{B2O3 / (MgO+CaO+SrO+BaO)} of from 0 to 0.5, a mole percent ratio MgO / (CaO+SrO) of from 0.5 to 1.5, a mole percent ratio (MgO+CaO+SrO+BaO—Al2O3)×B2O3 of from 1 to 10, and a mole percent ratio SiO2×CaO / MgO of from 30 to 90.

This invention provides a PA66 composite material for the electronic control cover of new energy vehicles and its preparation method. The composite material consists of 25-35% PPO, 15-25% PA66, 5-10% MXD6, 2-4% DZ570 synergistic flame retardant, 2-5% microencapsulated red phosphorus, 0.5-2% MCA, 0.3-1% phosphorus-nitrogen synergist, 18-25% matte alkali-free glass fiber, 4-8% spherical silica powder, 1-4% nickel-plated carbon fiber, 0.5-1.5% infrared-transparent black inorganic pigment, 0.2-0.5% dispersing wax, 0.1-0.5% nucleating agent, 0.1-0.5% low-shrinkage agent, 0.2-0.6% antioxidant, 0.3-0.8% weathering agent, and 0.1-0.5% fluorine-based internal lubricant. Through resin drying, graded premixing, low-shear twin-screw granulation, and high-temperature injection molding, the products, with a thickness of 1.5mm, meet UL94 V0, CTI≥600V, shielding≥35dB, shrinkage≤0.3%, anisotropy≤0.1%, protection IP67 / IP6K9K, salt spray resistance≥960h, and no cracking after 500 cycles at -40℃~125℃. They fully meet the requirements of national standards such as GB 18488, achieving integrated insulation, flame retardancy, shielding, and sealing, with a yield rate≥99%.

The application discloses a kind of high light transmission welding black glass fiber reinforced PBT composite material and preparation method thereof, belong to high polymer composite material technical field.The composite material is by weight fraction, including: PBT resin 64~70 parts, alkali-free chopped glass fiber 29~33 parts, special near-infrared light transmission black color masterbatch 2.5~4.5 parts, light scattering inhibitor 0.4~0.9 parts, interface compatibility agent 0.6~1.0 parts, laser welding aid 0.3~0.7 parts, composite antioxidant 0.2~0.6 parts, processing lubricant 0.3~0.7 parts.The application is by preferred matrix resin, modified glass fiber, special colorant and multiple auxiliary agent compound, combined with optimization preparation process, so that the light transmittance of material is greater than 55% at 1.5mm thickness, 980nm wavelength, tensile strength is greater than 120MPa, strength retention rate is greater than 80% after laser welding, appearance is pure black uniform, and processing performance is excellent, can be widely used in electronic appliances, automobile sensing, optical communication, laser welding precision parts and other fields.

The application discloses a kind of high density low rebound shotcrete and preparation method thereof, it is related to shotcrete field, and preparation method includes: (1), respectively to cementitious material, fine aggregate, coarse aggregate is using MAA model to be packed and the design ratio of each raw material in interior is obtained;(2), cementitious material, fine aggregate, coarse aggregate and the rebounding agent of design ratio obtained according to step (1) are fully mixed, water, water reducing agent is mixed, then by the way of mixing with pressurized air, incorporate accelerator, obtain high density low rebound shotcrete.The application uses early strength rebounding agent, improves the pumpability of shotcrete, accelerates the early hydration of concrete, under the joint action of alkali-free accelerator, rapidly improves the early mechanical properties of shotcrete, improves shotcrete construction efficiency.Multiple close packing is used, and cementitious material, fine aggregate, coarse aggregate respectively form close packing structure, effectively improve the plastic viscosity of paste and the compactness of concrete.

The utility model relates to mica tape technical field, concretely relates to integrated heat protection and electric insulation's mica tape, including mica tape main part, mica tape main part is composed by alkali -free glass fiber cloth layer and sets up the heat conduction layer on alkali -free glass fiber cloth layer, be provided with intermediate mica film between alkali -free glass fiber cloth layer and heat conduction layer, the surface of heat conduction layer is provided with surface insulating layer, the surface of surface insulating layer is provided with sticky layer, the outer surface of alkali -free glass fiber cloth layer is provided with release film, be provided with support cylinder on mica tape main part, mica tape main part is around and sets up in support cylinder, the central position of support cylinder is provided with center cylinder, and a plurality of support sheets are fixedly installed between center cylinder and support cylinder, be provided with support on center cylinder, a plurality of cut-off saw teeth are fixedly installed in the top board body of support near the front side part. The utility model has good heat dissipation and insulation protection performance, benefit prolonging the life.

The application relates to the technical field of concrete admixtures, and discloses an early-strength high-stability alkali-free accelerator and a preparation method thereof. The early-strength high-stability alkali-free accelerator is prepared from the following components in percentage by weight: aluminum sulfate 40-60%, aluminum tartrate solution 10-20%, alcohol amine compound 4-15%, 1,2-propylene glycol 5-10%, pH regulator 1.0-5.0%, magnesium sulfate 6-10%, stabilizer 1.0-1.5%, and water 3-8.5%. The raw material of the stabilizer comprises a sulfonic acid compound, and the sulfonic acid compound comprises one or more of 4-hydroxybenzenesulfonic acid, aniline-2,4-disulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid. The above technical scheme solves the problem of relatively poor stability of the alkali-free accelerator in the related art.

This invention provides alkali-free glass plates with excellent productivity and sufficiently high strain point and Young's modulus at low cost. An alkali-free glass plate, characterized in that, as a glass composition, it contains, in molar percentage, 61-69% SiO2, 9-15% Al2O3, 4-11% B2O3, 0-0.5% Li2O+Na2O+K2O, 0-0.1% K2O, 0-10% MgO, 4-13% CaO, 0-0.5% SrO, 0-0.5% BaO, 10-20% MgO+CaO+SrO+BaO, and 0-0.05% Fe2O3; the molar percentage ratio of MgO / CaO is 0-1.3; the molar percentage ratio of (Al2O3+MgO) / CaO is 0.69-3.1; the molar percentage ratio of MgO+CaO+SrO+BaO-Al2O3 is -2-9%; and the molar percentage ratio of (CaO+SrO+BaO) / Al2O3 is 0.2-2.

The application relates to the technical field of concrete admixtures, and discloses an early-strength high-stability alkali-free accelerator and a preparation method thereof. The early-strength high-stability alkali-free accelerator is prepared from the following components in percentage by weight: aluminum sulfate 40-60%, aluminum tartrate solution 10-20%, alcohol amine compound 4-15%, 1,2-propylene glycol 5-10%, pH regulator 1.0-5.0%, magnesium sulfate 6-10%, stabilizer 1.0-1.5%, and water 3-8.5%. The raw material of the stabilizer comprises a sulfonic acid compound, and the sulfonic acid compound comprises one or more of 4-hydroxybenzenesulfonic acid, aniline-2,4-disulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid. The above technical scheme solves the problem of relatively poor stability of the alkali-free accelerator in the related art.

This invention discloses a core-shell composite structure component for the housing of low-temperature electronic devices and its preparation method. It relates to the field of organic polymer materials technology. Its microstructure adopts a core-shell composite material structure, including a core as the processing phase and a shell as the toughening phase. The core is highly dispersed nano-sized polybutadiene rubber, and the shell is SAN glass fiber reinforced resin. The nano-sized polybutadiene rubber powder is highly dispersed with a particle size of 50-150 nm. The SAN glass fiber reinforced resin is a premixed modified material of SAN resin and 5-10% alkali-free glass fiber, forming a dual-core structure of the core-shell composite material. This core-shell composite structure component for the housing of low-temperature electronic devices achieves a comprehensive balance of cold resistance, mechanical strength, heat resistance, weather resistance, chemical stability, and recyclability through material formulation design including dual-core structure modification, interfacial compatibility strengthening, synergistic nano-toughening, and UV-resistant directional modification. Combined with process optimization such as microwave drying, high-performance mixing, three-stage injection molding, and optimized post-treatment, it also solves problems such as uneven drying of raw materials, high internal stress, and uneven flash during preparation.

This invention discloses a winding and flattening device for warping alkali-free glass fiber, including a base plate. Support plates are provided on both sides of the top of the base plate. Sliding grooves are formed at the bottom of the two sets of support plates on their adjacent sides. Buffer receiving components are slidably arranged inside the two sets of sliding grooves. This invention uses two sets of pressure plates with different hardnesses above the winding roller. The pressure plates can be changed according to the hardness of the glass fiber. Rotating the two sets of pressure plates around a rotating rod rotates the required pressure plate downwards, above the winding roller. At this point, under the elastic force of two sets of first springs, the telescopic frame is pushed downwards, causing the pressure plates to contact the glass fiber on the surface of the winding roller, firmly pressing the glass fiber. Simultaneously, two sets of cleaning brushes are provided inside the pressure plates to wipe away dust from the surface of the glass fiber, preventing dust from being pressed into the glass fiber during winding and improving the cleanliness of the glass fiber.

The application discloses a composite glass fiber fabric and a manufacturing process thereof, and relates to the technical field of glass fiber reinforced materials, which comprises a flow guide layer, a permeation and diffusion layer, a reinforced fiber layer and a support layer which are sequentially stacked, wherein the flow guide layer is provided with a plurality of flow guide channels, and a plurality of groups of the flow guide channels penetrate through the flow guide layer; wherein the left end of the flow guide channel is a glue inlet, the right end of the flow guide channel is an exhaust port, resin flows from left to right through the glue inlet, and the resin sequentially passes through the flow guide layer, the permeation and diffusion layer and the reinforced fiber layer. The composite glass fiber fabric has the advantages of uniform resin infiltration, low porosity and stable mechanical properties, can be used as a reinforced base material of alkali-free high-strength high-modulus glass fiber multi-axial fabric, unidirectional cloth, warp-knitted cloth, sewing and knitting felt and composite felt, and is suitable for the forming preparation of composite material parts such as wind power blades and yacht shells.

This utility model provides a surge arrester that effectively prevents current leakage and short circuits through a multi-insulation design of insulating sleeves, alkali-free glass fiber tape, and vulcanized silicone rubber sheds, ensuring stable operation of the surge arrester in harsh environments and extending its service life. Simultaneously, the design of heat dissipation jackets, heat dissipation channels, heat dissipation holes, and the formation of a heat dissipation cavity creates an excellent heat conduction path. This allows the internal heat generated by the surge arrester core to be quickly conducted to the heat dissipation jacket via the alkali-free glass fiber tape, and then conducted to the heat dissipation holes through the heat dissipation channels. This significantly shortens the heat transfer distance, enabling the internal heat to dissipate quickly to the external environment, effectively improving heat dissipation efficiency. It also prevents the insulation performance degradation caused by prolonged high temperatures accelerating the thermal aging of the vulcanized silicone rubber sheds and insulating sleeves, ensuring the performance stability of the surge arrester core, further extending the surge arrester's service life, reducing operating costs, and improving safety.

The alkali-free glass plate of the present invention is characterized by containing, in mol% as a glass composition, SiO2 60~74%, Al2O3 6~20%, B2O3 0~9%, MgO 1~13%, CaO 1~13%, SrO 0~7%, BaO 0~8%, and Y2O3+La2O3 0~1.0%, substantially not containing alkali metal oxides, and having a deformation point of 650°C or higher.

This invention discloses an alkali-free binary flooding surfactant, its preparation, and its application. The petroleum sulfonate surfactant disclosed in this invention is a sulfur trioxide sulfonate of a mixture of reduced-distillate oil, reduced-pentate oil, vacuum residue, and heavy alkylbenzene. The preparation process of the alkali-free binary flooding surfactant of this invention can employ batch sulfonation, requiring less equipment investment; the raw materials are reliable and inexpensive.

The application relates to the field of building waterproof materials, in particular to a synergistically stable high-performance non-chlorine, non-fluorine and non-alkali rapid setting agent for shotcrete and a preparation method thereof. The rapid setting agent is prepared from the following raw materials in parts by weight: aluminum sulfate 45-55 parts, triethanolamine 4-7 parts, diethanolamine 1-2 parts, synergistically stable and dispersing components 6.5-8 parts, aluminum silicate 3-5 parts, nano silicon sol 10-15 parts, amino acid 0.4-0.6 parts and a back elasticity reducing component 5-9 parts. The application realizes the synergy of the rapid setting and early strength functions and the durability function enhancement, solves the contradiction between the high aluminum sulfate concentration and the long-term storage stability, and guarantees the homogeneity and reliability of the product in the industrial production, transportation and use processes.

This invention relates to the field of gypsum board technology, specifically to water-resistant and moisture-proof paper-faced gypsum board and its preparation process. It includes two layers of modified facing paper and a gypsum board core material between the two layers of modified facing paper. The core material is characterized by being composed of a modified core slurry, the raw materials of which consist of: gypsum clinker, water, cement granules, premixed paste, alkali-free glass fiber, hydrophobic / hydrophilic mixed starch, hydroxypropyl methylcellulose, a setting accelerator, and a silicone oil catalyst. This invention constructs a micro-nano titanium dioxide / silane composite hydrophobic coating on the surface of the facing paper, forming the first physical water-blocking layer. Simultaneously, silane-modified nanocellulose and emulsified silicone oil are introduced into the core material to establish a hydrophobic network. These two elements synergistically form a gradient protective structure of surface shielding and internal hydrophobicity. Even with localized wear of the outer coating, the core material can still effectively prevent moisture diffusion, significantly improving its water resistance reliability in long-term humid environments.

The application discloses a method for quantitatively evaluating the coordination ability of complex components in an alkali-free quick-setting agent to aluminum ions, and relates to the technical field of concrete quick-setting agents.The application verifies whether a certain complex component can be complexed with aluminum ions through conductivity determination, and then adopts complex component titration of supersaturated aluminum sulfate suspension to further obtain the coordination ratio of the complex component to the aluminum ions to form a complex.The method can quickly determine whether the complex component can increase the solubility of aluminum sulfate, and the coordination molar ratio of the complex component to the aluminum ions can be obtained through calculation, so that the coordination ability of the complex component in the alkali-free quick-setting agent to the aluminum ions can be quantitatively evaluated, thereby providing a theoretical basis for the selection and dosage of the complex component in the production process of the alkali-free liquid quick-setting agent.

Provided is a laminate in which adhesion of a decorative layer to chemically strengthened glass or alkali-free glass is high and the decorative layer is unlikely to fall off.　A laminate (1) comprises a substrate (2), an adhesive layer (3) that is layered on at least a portion of the substrate (2), and a decorative layer (4) that is formed so as to be in contact with the adhesive layer (3). The substrate (2) is chemically strengthened glass or alkali-free glass. The adhesive layer (3) contains a thermally transferable resin. The decorative layer (4) contains a thermally transferable resin. The ratio of the thickness of the adhesive layer (3) and the thickness of the decorative layer (4) is preferably 1:0.01-1:100. It is preferable that a pressure-sensitive sensor (5) be provided on at least a portion of the substrate (2) so as to be in contact with the adhesive layer (3) and / or the decorative layer (4).

This application relates to the field of special protective materials technology, and discloses a high-temperature resistant and wear-resistant composite protective sleeve and its preparation process. The composite protective sleeve includes a layered substrate and an impregnating resin system that penetrates and is thermally cured on the layered substrate. The layered substrate includes silica aerogel felt, polyimide film tape, and alkali-free glass fiber continuous braided sleeve. The raw materials of the impregnating resin system are: vinyl-terminated polymethylphenylsiloxane; polymethylhydrosiloxane; surface-modified hexagonal boron nitride powder; spherical pure aluminum powder; zinc borosilicate glass powder; triallyl isocyanurate; a mixture of chloroplatinic acid-divinyltetramethyldisiloxane complex and 1-ethynyl-1-cyclohexanol; and hydrophobic fumed silica. This invention adopts a polysiloxane resin system technology solution with added spherical pure aluminum powder and zinc borosilicate glass powder, achieving the technical effect of in-situ generation of a continuous inorganic ceramic layer through a physicochemical phase change when the sleeve is heated.

The present application relates to the technical field of alkali-free accelerator, and particularly discloses a kind of red mud alkali-free accelerator and a preparation method thereof.The preparation method comprises the following steps:S1, red mud powder pretreatment: using suspension shock conical surface concentrator to treat red mud powder;S2, raw material addition: after the pretreatment, the red mud powder is modified by refining, and is put into a reaction kettle according to the preset mass fraction ratio;S3, main reaction: industrial sulfuric acid and phosphorus chemical by-products are sequentially added into the reaction kettle, the specific temperature in the kettle is controlled, and the reaction is completed by continuous stirring;S4, post-treatment: after the reaction is completed, the reaction system is sequentially subjected to suspension treatment, complexation treatment and inorganic acid adjustment treatment;S5, product obtaining: after the above post-treatment, the alkali-free accelerator product is obtained.The present application effectively solves the environmental pollution problem caused by the large amount of red mud accumulation, and prepares an alkali-free accelerator with excellent performance, realizes the efficient utilization of red mud as a bulk resource, and has both environmental protection value and application value.

This invention relates to the field of diamond abrasive technology and discloses a method for preparing diamond abrasives with a microcrystalline glass bond resistant to pure water corrosion. The method involves surface activation pretreatment of diamond micropowder to obtain activated diamond micropowder; coating the activated diamond micropowder with amorphous silica to obtain pretreated diamond micropowder; uniformly mixing the microcrystalline glass bond, pretreated diamond micropowder, and binder, followed by pressing to obtain a molded blank; and then subjecting the molded blank to gradient sintering to obtain the microcrystalline glass bonded diamond abrasive. The microcrystalline glass bond of this invention is an alkali-free formulation, which effectively improves the water and acid resistance of the composite material. Through reasonable component formulation, a high degree of compatibility with the thermal expansion coefficient of diamond is achieved, enhancing the dimensional and thermal stability of the grinding wheel during the grinding process.

The application relates to a heat-proof integrated cable suitable for a carrier rocket and belonging to the field of cable heat-proof structure design; the cable comprises a high-temperature-resistant heat-proof integrated core wire and an alkali-free glass fiber heat-insulating sleeve pipe, the cable core wire adopts the high-temperature-resistant core wire, the heat environment adaptability of the cable itself is improved, the alkali-free glass fiber sleeve pipe is arranged outside the cable core wire bundle, the cable core wire bundle is kept in shape, and the wear resistance of the cable during use is improved. The application successfully solves the heat-proof problems of the second-stage bottom and the third-stage bottom cables of two types of carrier rockets, and simultaneously meets the requirements of heat-proof structure integration, structure lightening and high reliability.