107 results about "Wax" patented technology

This invention discloses a method and system for purifying and treating release agents, belonging to the field of release agent purification and treatment. The treatment method is as follows: S1, raw release agent wastewater is introduced into a treatment tank for hydraulic cavitation treatment, while ozone is simultaneously introduced. Floating oil, waste wax, and solid particulate matter in the wastewater float to the surface of the treatment tank and overflow into a scum tank; S2, after cavitation treatment, when there is very little scum on the surface of the treatment tank, the treated liquid in the treatment tank is introduced into a media filter for further filtration. The filtered clean liquid is then transported to a supply tank; S3, when the media packing adsorbs a thick wax layer, the pressure in the filter tank reaches a threshold. Water from the circulating water tank is introduced into the filter tank to backwash the wax layer. The water containing wax after backwashing enters the circulating water tank; S4, when the wax content in the circulating water in the circulating water tank reaches a threshold, a low-temperature steel roller is used to cool the water, causing wax to precipitate onto the steel roller. The wax is scraped off and collected, and the water is reused. This invention uses hydraulic cavitation to break out and remove oil and wax from waste liquid, and further removes residual waste wax from the treated liquid through media filtration, ensuring the cleanliness of the recycled mold release agent liquid.

Provided are a method for measuring the wax concentration of a paint, a coating method, and a method for manufacturing a surface-treated steel sheet, which can measure the wax concentration contained in the paint at a point before applying the coating to the target material to be coated. 【Solution means】A solid content extraction step (step S101) of heating the paint to extract a solid containing wax, a wax extraction step (step S102) of immersing the solid in an organic solvent to obtain a wax extract, an analysis step (step S103) of analyzing the wax extract, and a calculation step (step S104) of calculating the wax concentration from the analysis results, and the heating conditions of the solid content extraction step satisfy the following. T W +20 ≦ T ≦ T W +70 90 ≦ t ≦ 150 T W +130 < T + t < T W +190 T is the heating temperature (°C), T W is the melting point of the wax (°C), and t is the heating time (minutes).

1. The name of the design product: depilation wax (cherry series 02). 2. The use of the design product: for depilation wax. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design.

The present application relates to the chemical technology field, specifically to a kind of low melting point wax and preparation method thereof.The preparation method of the low melting point wax described in the present application, characterized in that, the method comprises the following steps: raw oil is mixed with first solvent, heated and dissolved, to obtain first solution;The first solution is cooled, crystallized, first residence, to obtain first crystallization liquid;The first crystallization liquid is cooled, crystallized, second residence, to obtain second crystallization liquid;The second crystallization liquid is first solid-liquid separation, to obtain dewaxed oil and wax cream;The wax cream is mixed with second solvent, and then deoiled, second solid-liquid separation, to obtain deoiled wax cream;The deoiled wax cream is removed solvent, to obtain finished wax;Raw oil is fischer-tropsch oil at 280 DEG C-450 DEG C fraction;Solvent is selected from ester solvent.Using this method, the yield of product wax is improved, the oil content in product wax is reduced, and the melting point range of product wax can be flexibly controlled.

This invention relates to the field of petrochemical catalytic desulfurization technology, specifically disclosing a high-efficiency desulfurizing agent, its preparation method, and its application in the desulfurization of heavy naphtha. The desulfurizing agent provided by this invention has a "two-level" metal active center. The first level is a cobalt center in biochar, and the second level is a nickel-copper bimetallic center introduced through impregnation on the surface of a composite carrier. The desulfurizing agent provided by this invention has excellent desulfurization effect. Under conditions of 140°C and no hydrogen, it can simultaneously remove inorganic sulfur such as hydrogen sulfide and organic sulfur such as thiols, thioethers, and thiophenes from heavy naphtha obtained by hydrocracking of heavy diesel oil, wax oil, or mixed diesel and wax oil, reducing the total sulfur content from 25-40 μg·g. ‑1 Reduced to 0.2 μg·g ‑1 The following methods can effectively protect bimetallic (multimetallic) reforming catalysts from sulfur poisoning, and the preparation process is green and controllable, making it suitable for large-scale industrial applications.

This invention relates to the field of cosmetic products, specifically disclosing a long-lasting mosquito-repellent lacquerwood wax composite balm. This composite balm, by weight fraction, comprises 20-25 parts by weight of lacquerwood peel wax, 12-18 parts by weight of lemon eucalyptus oil, 3-8 parts by weight of catnip oil, 35-45 parts by weight of a temperature-controlled phase change regulating oil, 5-10 parts by weight of a hydrophobic plant-derived film-forming agent, 2-5 parts by weight of isosorbide dicaprylate, and 0.5-1 part by weight of a fat-soluble antioxidant. The long-lasting mosquito-repellent lacquerwood wax composite balm of this invention achieves a long-lasting and stable release of mosquito-repellent active ingredients, while also possessing suitable temperature-controlled phase change properties, a pleasant skin feel, synergistic mosquito-repellent effects, excellent hydrophobic and sweat-resistant capabilities, and stable storage of natural components.

The invention belongs to the technical field of aeronautical materials, and particularly relates to a PEI modified material containing a high-temperature composite dispersion system as well as a preparation method and application of the PEI modified material. The PEI modified material containing the high-temperature composite dispersion system provided by the invention is prepared from the following raw materials: polyetherimide resin, titanium dioxide, carbon black and dispersing agents (a coupling agent and polyamide wax). The PEI modified material containing the high-temperature composite dispersion system provided by the invention can realize efficient and uniform dispersion and color regulation and control of pigments in a high-viscosity and strong-polarity system, and has excellent heat resistance, mechanical property and flame retardant property, and interior structural parts prepared from the PEI modified material meet the comprehensive requirements on light weight, attractiveness and durability in the aviation field.

This invention discloses an anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, relating to the field of scale inhibition and prevention. The material includes an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 60-75%, Zn 15-28%, Al 3-8%, Ni 1.2-3.5%, Sn 0.5-2.0%, rare earth composite agent 0.1-0.8%, B 0.02-0.15%, with the balance being unavoidable metallurgical impurities. The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%. This invention utilizes a Cu-Zn-Al-Ni-Sn alloy system with a specific ratio of rare earth composite agent and trace amounts of boron, supplemented by ultrafine equiaxed crystal structure control, and then undergoes a composite surface treatment involving plasma nitriding, micro-arc oxidation, and vacuum impregnation with fluorosilane. The resulting anti-scaling and anti-wax alloy material for circulating water systems possesses both stable mechanical and electrical properties and excellent adaptability to the water environment.

The application discloses a preparation method of ethylene acrylic acid composite wax emulsion, comprising the following steps: S1: starch and dilute hydrochloric acid are mixed and heated to 60-70 DEG C, part of initiator is added, acidolysis oxidation is carried out under stirring reflux, pH is adjusted to 4.0, and an emulsifier is added; S2: the emulsion of ethylene acrylic acid copolymer is added dropwise into the reaction system, the temperature is raised to 80-90 DEG C, the remaining initiator is added after reaction for a period of time, and the reaction is continuously carried out; after the reaction is completed, the temperature is reduced to room temperature, and a pH regulator is added to adjust the pH to 8.5-10.5. The preparation method of the application firstly carries out positioning treatment through acidolysis oxidation, then adds appropriate emulsifier and initiator, and grafts onto ethylene acrylic acid copolymer by using emulsion polymerization method. The prepared ethylene acrylic acid composite wax emulsion has a light transmittance of 60-80%, a viscosity of less than 1000 mpa.s, and a milky white appearance without particles, and has excellent compression shear dry strength and wet strength when used as an adhesive.

The application provides a high-slip hot-melt road marking paint composition containing ceramic particles and relates to the technical field of materials, which is prepared from the following raw materials in mass parts: petroleum resin 18-22 parts, plasticizer 4-7 parts, polyethylene wax 1-2 parts, ethylene-vinyl acetate copolymer 2-5 parts, filler 25-35 parts, hollow glass microbead 8-12 parts, ceramic particle 15-22 parts, thixotropic agent 3.1-5.5 parts, silane coupling agent 0.3-0.5 parts, antioxidant 0.1-0.3 parts and pigment 5-8 parts. Through the synergistic effect of ternary thixotropic compound of hydrogenated castor oil-polyamide wax micro powder-fumed silica, hollow glass microbead density reduction and ceramic particle surface modification, the comprehensive performance of the hot-melt marking paint is significantly improved. The high-density large-particle-size ceramic particles are effectively inhibited from settling in the hot-melt state, and the balance between slip resistance, durability and workability is achieved.

This invention relates to the field of tobacco sheet technology, and more particularly to a tobacco sheet containing double-layer flavor microcapsules and its preparation method. The preparation method includes the following steps: preparing double-layer flavor microcapsules with a wax coating, the wax melting temperature being 40–70 °C; mixing tobacco raw materials, binders, and double-layer flavor microcapsules under high-speed shearing to obtain a dry mixture; the high-speed shearing is performed with a stirrer frequency of 25–35 Hz and a shearing blade frequency of 25–35 Hz for 15–25 s; the mass of the double-layer flavor microcapsules is 15%–25% of the mass of the tobacco raw materials; preparing a water suspension from woody raw materials, and then mixing it with binders and atomizing agents to obtain a wet mixture; spraying the wet mixture into the dry mixture under high-speed shearing to obtain a compound; and then rolling to obtain a tobacco sheet. This invention can improve the tensile strength of the tobacco sheet and reduce its viscosity while reducing the amount of woody raw materials used to ensure sensory quality.

A method for determining the penetration properties of a compound into and / or through a plant leaf wax cuticular layer, said method comprising a) providing a model plant wax layer comprising at least one wax and Nile Red; b) subsequently contacting the model plant wax layer with a composition comprising the compound; and c) monitoring the penetration of the compound into and / or through the model plant wax layer by monitoring the change in Nile Red fluorescence. Furthermore, the use of Nile Red comprised in a wax layer for determining the penetration properties of a compound into and / or through said wax layer is described, and a wax layer deposited onto a solid support, wherein said wax layer comprises at least one plant wax and Nile Red.

A composition comprising at least one fuel that is a diesel fuel, a biodiesel fuel, or combinations thereof and less than 100ppm, less than 50ppm (or less than 25ppm, less than 10ppm, 1 to 7ppm, or 5 to 7ppm) of an alkylene-coupled C10 to C60 (or C10 to C40, C14 to C32 or C24 to C28) alkylphenol; 25 to 500ppm (or 50 to 500ppm, or 150 to 450ppm or 250 to 450ppm, or 250 to 400ppm) of a terpolymer; and 5 to 90ppm, (or 10 to 70ppm, to 60ppm, or 10 to 55ppm) of hydrocarbyl-substituted amine detergent having at least one tertiary amino group. Methods of reducing the cold filter plugging point ("CFPP") of a fuel, said method comprising adding the following components: less than 100ppm, less than 50ppm (or less than 25ppm; less than 10ppm, 1 to 7ppm, or 5 to 7ppm) of an alkylene-coupled C10 to C60 (or C10 to C40, C14 to C32 or C24 to C28) alkylphenol; 25 to 500ppm (or 50 to 500ppm, or 150 to 450ppm or 250 to 450ppm, or 250 to 400ppm) of a terpolymer; and 5 to 90ppm, (or 10 to 70ppm, to 60ppm, or 10 to 55ppm) of hydrocarbyl-substituted amine detergent having at least one tertiary amino group. Uses of a fuel additive composition to reduce the cold filter plugging point ("CFPP") of a fuel, wherein the fuel additive composition comprises: 0.2 to 3wt% of an alkylene-coupled C10 to C60 (or C10 to C40, C14 to C32 or C24 to C28) alkylphenol; 10 to 50wt% of a terpolymer; and 2 to 10wt% of hydrocarbyl-substituted amine detergent having at least one tertiary amino group; and an optional solvent.

The application discloses a kind of high hardness, high weather-resistant TPU material and preparation method thereof, the TPU material includes by weight fraction: 30~60 parts cyclohexane polyol, 30~60 parts cyclohexane diisocyanate, 0.3~2 parts antioxidant, 0.05~1 parts lubricant, 0.05~0.5 parts wax powder, 0.01~0.5 parts catalyst.The application adopts double symmetry cyclohexane aliphatic ring structure, molecular chain arrangement is neat, phase region size is less than visible light wavelength, with high hardness, high transmittance and low haze;Pure aliphatic ring structure eliminates yellowing from the source, and has excellent weather resistance and aging resistance;Double cyclohexane skeleton forms steric barrier, has outstanding hydrolysis resistance, acid and alkali resistance, fuel resistance, while high temperature mechanical retention rate, creep resistance and dimensional stability are excellent, and can be widely used in diesel filter oil cup, high temperature sealing element, outdoor transparent structural member and other high-end scenes.

This utility model relates to the field of biosynthetic gas treatment technology, specifically disclosing a process system for the co-production of solid wax, liquid hydrocarbons, and hydrogen from biosynthetic gas Fischer-Tropsch synthesis. The system comprises a pretreatment system, a blower system, a compression system, a shift converter system, a desulfurization system, an MDEA decarbonization system, a PSA hydrogen extraction system, a desorbed gas compression system, a fine desulfurization and pressurization system, and a Fischer-Tropsch synthesis system, connected in sequence. This process system utilizes biosynthetic gas from the pyrolysis and gasification of municipal solid waste, producing solid wax, liquid hydrocarbons, and hydrogen through a combination of technologies including Fischer-Tropsch synthesis and pressure swing adsorption. This system converts organic matter in waste into high-value-added chemicals such as solid wax, liquid hydrocarbons, and hydrogen, achieving resource utilization and reducing environmental pollution. Furthermore, the process system can adjust the types and quantities of products according to market demand to maximize economic benefits.

This utility model discloses a composite wax storage tank, comprising: a base frame, a tank body, a top cover, and a heating element. The tank body is mounted on the top surface of the base frame, and a drain pipe is mounted on the bottom of the tank body, located below the inner top surface of the base frame. Heating tubes are arranged in a ring array on the inner wall of the tank body, with multiple layers of heating tubes installed vertically. Each heating tube has a hollow tube structure. The tank body is pre-drilled at the installation position of the heating tubes. By welding the hollow end of the heating tube to the edge of the hole, the closed end of the heating tube is located inside the tank body, while the hollow end is in communication with the outside. This utility model provides a composite wax storage tank that solves the problem of low heating efficiency and slow melting speed in existing operating methods, where high-temperature steam is located inside the interlayer and requires heating layer by layer along the circumference of the tank body. For example, the outer ring of solidified wax melts first before the inner ring and center can be melted.

This application relates to the field of wax impregnation technology, and more particularly to a wax impregnation device, comprising: a heating furnace with a receiving tank for holding molten wax; an adjustment mechanism including a mounting part; the adjustment mechanism being movably connected to the heating furnace, and the movement of the adjustment mechanism relative to the heating furnace causing the mounting part to move closer to or away from the receiving tank; and a mounting assembly rotatably connected to the mounting part, the mounting assembly including a flexible member for fitting into a hole in the workpiece to be waxed. The wax impregnation device described in this application can replace manual wax impregnation operations, effectively avoiding the problem of slow wax impregnation efficiency caused by manual operation, thus improving the production and assembly efficiency of the final product. Furthermore, the wax impregnation device can avoid the problems of unreliable and inconsistent wax impregnation effects caused by manual operation, thus ensuring a reliable sealing effect between the wax-impregnated workpiece and other parts after assembly.

This invention discloses a hot melt adhesive for high-temperature protective clothing and its preparation method, comprising the following raw materials: Fischer-Tropsch wax, styrene-isoprene-styrene block copolymer with 0% diblock content, styrene-isoprene-styrene block copolymer with 20-30% diblock content, styrene-isoprene-styrene block copolymer with 40-50% diblock content, rosin resin, petroleum resin, ethylene-vinyl acetate copolymer, and antioxidant. This hot melt adhesive requires no toxic solvents, possesses both heat resistance and water resistance, and is suitable for high-temperature protective clothing. The preparation method of this hot melt adhesive involves heating and mixing polymer materials without adding any solvents or toxic substances during the preparation process, reducing the risk of toluene poisoning, completely solving the problems of solvent evaporation and recovery, and, more importantly, eliminating safety hazards in the storage and use of organic chemicals, achieving environmentally friendly, safe, and efficient production.

The application discloses a cleaning system of a sewage stripping tower and a method for cleaning the sewage stripping tower, wherein the cleaning system of the sewage stripping tower comprises an olefin separation device, a waste alkali delivery pump is arranged on the olefin separation device, the waste alkali delivery pump is provided with an outlet guide, a sewage stripping tower is provided with a feed pump, the feed pump is provided with an inlet guide, a connecting pipeline is connected with the outlet guide of the waste alkali delivery pump at one end and connected with the inlet guide of the feed pump at the other end, and the connecting pipeline is used for introducing waste alkali liquid generated by the olefin separation device into a feed system of the sewage stripping tower, so that the waste alkali liquid is subjected to a saponification reaction with oil wax type pollutants attached to a tower tray surface in the sewage stripping tower, and the oil phase is removed. The scheme of the application utilizes waste alkali liquid generated by the device as a cleaning medium, can clean the sewage stripping tower, and realizes resource utilization of the waste alkali liquid. Meanwhile, the cleaning process is carried out in a normal operation state, and offline shutdown is not needed, so that production interruption and economic loss are avoided.

This invention discloses a method for extracting and purifying lutein extract based on a composite solvent system, specifically relating to the field of natural product separation and extraction. The method involves mixing a crude extract containing lutein esters from marigold with a first composite solvent system. This allows lutein esters, oils, and resinous impurities in the crude extract to enter the liquid phase. Waxes are then precipitated by lowering the system temperature, resulting in a dispersion system containing the precipitated waxes. The first composite solvent system consists of a first organic solvent and a second organic solvent. By first introducing lutein esters, oils, and resinous impurities into the liquid phase in the first composite solvent system, then allowing the waxes to precipitate and separate, and subsequently transferring the lutein esters to a lutein ester-enriched phase, lutein can be separated from major accompanying impurities before entering the saponification and purification processes. This relatively reduces the burden on subsequent processes and alleviates issues such as slow stratification, increased entrainment, and batch fluctuations.

The utility model belongs to wax water treatment technical field, specifically is the wax water treatment standing barrel with layered flow guide, it is including: the barrel body, the top of barrel body is provided with the feed inlet, the barrel body is fixedly connected with the transparent plate, the inside installation of barrel body has upper flow guide plate, the inside installation of barrel body has middle layer flow guide plate, wax water first through the separation of upper flow guide plate and hydrophilic composite layer, the wax group that does not melt in wax water, bubble and oil slick are separated, then middle layer flow guide plate is to the separation treatment of moderate density suspended matter and transitional emulsion, the lower flow guide plate is to high density precipitate, flocculation aggregate and viscous sludge and water are separated, through the cooperation of three layers flow guide, can carry out gradient separation to wax water, make the sundries of different density separate in different area, namely can carry out step -by -step purification to wax water, thereby makes the wax water stratification more completely, thereby improves the wax water standing stratification treatment quality.

The application discloses a high-efficiency wax-removing cleaning solution for LED manufacturing process, which comprises the following components in the form of a total of 100% by mass: a pH regulator 0.1-5%, an organic alcohol ether solvent 70-90%, a rosin-based imidazoline sulfonate surfactant 0.1-5%, a wetting agent 0.1-1%, and deionized water 5-30%. The application aims to provide a LED wax-removing cleaning agent for cleaning the residual wax on the front surface of a chip and various contaminants on the back surface of the chip after waxing of an LED wafer. Compared with a traditional wax-removing solution, the application has the advantages of less volatile liquid, high cleaning life, high wax-removing cleanliness, protection of the chip electrode, reduction of the occurrence rate of glue gas pollution, and the ability to solve the common back-contamination problem in the industry, that is, the application has a strong cleaning and removing effect on organic contaminants such as residual polishing powder particles, latex fingerprints and various residual glue.

The present application relates to the technical field of paint, and relates to an oil-based fireproof paint and a preparation method thereof.The oil-based fireproof paint comprises the following components in parts by weight: modified epoxy resin 15-19, organic silicon modified acrylic resin 5-7, silane modified ammonium polyphosphate 10-12, pentaerythritol 5-8, zinc borate 3-5, hydrotalcite coated zinc stannate composite material 10-12, boron nitride 9-11, dispersing agent 0.8-1.2, leveling agent 0.2-0.4, polyamide wax anti-settling agent 0.6-0.8, and solvent 40-60.The oil-based fireproof paint provided by the present application improves the fire resistance limit and the flame retardancy of the paint, and achieves the best fireproof protection effect;the compatibility of the ammonium polyphosphate and the oil-based resin matrix is improved, and the fireproof performance, the long-term storage stability and the medium corrosion resistance of the cured coating are improved.

The invention discloses an avocado can preparation method which comprises the following technological steps: peeling fresh avocado and cutting into cubes for standby application; filling a canned bottle with the avocado, smashing through a smashing tool, then putting the canned bottle into a steamer to perform steam bath for 15 to 20 minutes, stopping heating, cooling for 2 to 3 minutes, coating a layer of wax yellow on an uppermost layer of the avocado, covering a bottle cap of the canned bottle, and naturally cooling to room temperature to obtain an avocado can. By adopting the avocado can preparation method, natural fruit taste is remained, and the avocado can is rich in nutrients and better in eating taste.

A water-in-oil emulsion composition with good emulsification and makeup-holding properties is disclosed. The water-in-oil emulsion composition comprises: (A) a metallic soap, (B) a coloring material, and (C) an ester wax, wherein the amount of component (C) relative to the total amount of wax in the composition is 25% by mass or more.

The present disclosure relates to a method including exposing a composition comprising a wax-microsphere matrix to a first melt-condition, wherein said wax-microsphere matrix comprises a wax component and a plurality of lyophilised microspheres, wherein said plurality of lyophilised microspheres comprise one or more reagent, whereby exposing said composition comprising said wax-microsphere matrix to said first melt-condition melts the wax component; exposing said composition to a first release-condition to rehydrate at least one lyophilised microsphere; and exposing said at least one rehydrated lyophilised microsphere to a separation-condition to separate said wax component from said at least one rehydrated lyophilised microsphere. Also disclosed are methods of preparing a wax-microsphere matrix and releasing one or more reagent from a wax-microsphere matrix as well as compositions. Also disclosed are cartridges with a reagent reservoir including the compositions described herein. Also disclosed are systems for controlling release of one or more reagent including the compositions described herein.

In a slow-dissolving composition, the aim is to achieve excellent slow-dissolving properties, resistance to cracking, and reduced adhesion to the object being washed. [Solution] Used by placing it in the lint filter or detergent dispenser of a washing machine, with a volume of 100 mm 3 The above is the basis for the product. It is preferable that the hardness be 8 to 50 kgf, and that it contains (A) an inorganic metal salt that is sparingly soluble or insoluble in water, (B) one or more selected from wax, hardened oil, sucrose fatty acid ester and cellulosic polymer, and (C) sugars.

This invention discloses a mineral oil defoamer and its preparation method, achieving an excellent balance between defoaming and foam-suppressing performance, stability, and compatibility. The production process is deeply optimized based on the characteristics of the raw materials. First, a portion of the mineral oil is fully swollen and mixed with a special structured fatty acid metal soap to form a specific three-dimensional network structure, forming mixture M. Then, a portion of the mineral oil is fully mixed with oxidized polyethylene wax with a specific acid value to form a wax gel mixture N, improving defoaming and anti-settling properties. The two mixtures are premixed with a selected emulsifier, and then polyglycerol ester is added and thoroughly stirred. Utilizing the special structure of polyglycerol ester, a stable emulsion system can be formed between the mixture and the emulsifier, improving compatibility while also maximizing the defoaming and foam-suppressing performance of the defoamer.

A toner comprising a toner particle comprising a binder resin and a wax, wherein the binder resin comprises a crystalline resin, in measuring a viscoelasticity of the toner, the temperature is raised from 30° C. to 100° C. at a rate of 2° C. / min to obtain a curve G′1(T) of storage elastic modulus G′ versus temperature T; then, the temperature is lowered from 100° C. to 30° C. at a rate of 2° C. / min to obtain a curve G′2(T); then, the temperature is raised from 30° C. to 100° C. at a rate of 2° C. / min to obtain a curve G′3(T); the storage modulus at specific temperatures in each curve satisfies the following formulas.G1′(100)≤5.×1⁢04⁢ Pa(1)G3′(50)≥7.0×1⁢07⁢ Pa(2)G3′(70)≥2.0×1⁢06⁢ Pa(3)G3′(70) / G2′(70)≥10(4)