56results about How to "Clear grain" patented technology

The invention discloses an electrochemical metallographic etching method universal for nickel-based alloys and relates to the electrochemical etching of the metallographic structure of a metal material. The method adopts the electrochemical metallographic etching method and takes an etching solution as a conducting medium, a metallographic specimen to be observed as an anode and a platinum electrode as cathode; the etching-control conditions comprise: the constant etching voltage: 2V / cm<2>-8Vcm<2>, the etching time: 1min-5min, the etching solution thereof contains in percentage by weight, 65%-85% of phosphoric acid, 5%-15% of sulfuric acid, 8%-15% of chromic acid and 3%-8% of glycerol, the prepared high-temperature corrosion-proof nickel-based alloys such as G-3, 825, X750 and the like have flat surface of metallograph, clear crystal boundary and clear crystal grain. Compared with chemical etching method, the electrochemical metallographic etching method has easily-controlled experimental conditions, good experimental repeatability and high experimental efficiency and is suitable for Ni-Fe-Cr alloys.

The invention relates to a preparation method of metallographic samples of zirconium and zirconium alloy. The preparation method comprises the following steps: (a) sample pretreatment, namely sampling a to-be-tested material, ultrasonically cleaning to remove oil stain on the surface of a sample; (b) coarse grinding and fine grinding, namely grinding the sample processed in the step (a) on metallographic sand paper, wherein particle size marks of the utilized sand paper sequentially are 400#, 800#, 1200#, 2000# and 3000#; (3) chemical polishing, namely preparing a solution in a volume ratio that HF to HNO3 to H2O is 10 to 45 to 45, dipping the solution with an absorbent ball, and lightly wiping the surface of the sample with the absorbent ball for several times until the surface of the sample presents a polished surface as bright as a mirror; (d) cleaning, namely lightly wiping the surface of the polished sample in the step (c) by dipping absolute ethyl alcohol with the absorbent ball so as to remove complexes generated by chemical polishing; (e) oxidation cooling, namely dehydrating the cleaned sample, arranging the sample in a constant temperature region of a muffle furnace for oxidation for 2-10 minutes until the color of the surface of the sample is changed from bright white to faint yellow, taking out the sample, cooling, and carrying out metallographic observation and particle size evaluation.

The invention discloses a method for tanning sheepskin through synergy of organic amine and an epoxy resin composition tanning agent. The method comprises the steps that softened or acid removing sheepskin is processed by an organic amine bath lotion, and then the epoxy resin composition tanning agent is added for tanning. As the organic amine permeates into skin fibers, the organic amine can cooperate with the epoxy resin composition tanning agent to make amido of the organic amine and amido on skin collagen fibers have a reaction, a net-shaped crosslink structure is formed, and accordingly the damp heat resistance stability of leather is improved, the epoxy resin can serve as the main tanning agent to tan the sheepskin, the tanning performance is improved, the tanned sheepskin leather isclear in grain surface, rich in body, pure white in color and good in yellowing resistance performance, and the storage life of the tanned leather is longer than six months at the room temperature.

The invention discloses a no-salt pickling-free short-process no-chrome tanning method. One the basis of advantages and disadvantages of chrome and requirements for environment protection, the no-salt pickling-free no-chrome tanning method suitable for production and feasible is needed at the present, and the finished leather quality of the method can be favorably compared with that of a traditional chrome tanning technology. The no-salt pickling-free short-process no-chrome tanning method comprises the steps that softened naked leather is directly tanned with no-chrome tanning agents to obtain wet white leather; the uniformly shaved wet white leather is tanned with substitute type synthetic tanning agents, then tanned with vegetable tanning agents and finally tanned with a defined amount of aluminum tanning agents; and a no-salt pickling-free no-chrome tanning leather blank is obtained. According to the no-salt pickling-free short-process no-chrome tanning method, the shrinkage temperature of the obtained no-chrome tanning crust leather is higher than 95 DEG C, and a body of the finished leather is soft and rich and capable of being favorably compared with chrome tanning leather in the quality, performance and other aspects; and meanwhile, the pickling process is omitted, the tanning time is shortened, and the consumption of sodium chloride and chrome salt in the leather production process and the pollution of the sodium chloride and the chrome salt to human and the environment are eradicated.

The invention provides a positive ion polyacrylate leather finishing agent and a preparation method thereof. The positive ion polyacrylate leather finishing agent comprises 16-33 wt% of polyacrylate, 0.5-3 wt% of emulsifier and 65-83 wt% of water, wherein the polyacrylate is obtained by that a positive ion functional monomer and an acrylate monomer are subjected to polymerization reaction under the effect of an initiator and a cross-linking agent; and the positive ion functional monomer is one or more of dimethylaminoethyl methacrylate, methacrylate trimethylammonium chloride and trimethyl ammonium chloride n-methyl acrylamide. The positive ion polyacrylate leather finishing agent provided by the invention is mainly used for coating a leather bottom layer, and can be used for improving the appearance and the grade of finished leather. The finished leather is natural and soft after being coated with the positive ion polyacrylate leather finishing agent. Furthermore, the leather finishing agent provided by the invention does not contain APEO (alkylphenol ethoxylates), and no methanol is released. Moreover, the preparation method has the advantages of suitability for industrial production and stabilization in batch.

A production method of polished tiles having a jade stone texture, wherein the polished tiles is prepared from following raw materials: high-whiteness albite powder being 5-10 wt% in the content of sodium, feldspar, clay, talcum being 28-32 wt% in the content of MgO, anorthite being 2.0-4.0 wt% in the content of CaO and bone ash being 45-50 wt% in the content of CaO. The production method includes following steps: powder producing, blank body moulding, high-temperature sintering and polishing. During the blank body moulding, firstly more than more than one stacks of a granular powder material is randomly arranged on a material arranging trolley in the form of a large-granular materials, and then a layer of mixed powder material is arranged at the periphery of the granular powder material. The powder materials are press-compacted by a press roller and then are cracked naturally, wherein the cracks are filled with a super-transparent jade material. Finally the prepared materials are fed into a die cavity for being compression-moulded. Compared with a method in the prior art, the production method is free of addition of a reinforcing agent and a whitening agent (such as zirconium silicate) which are harmful to environment. The polished tile has a super-transparent sense just like jade stone, is fine-and-smooth and has a layered sense, is clear in bottom pattern, and has such an excellent jade-like texture.

The invention discloses a method for improving yield of leather. The method for improving the yield of leather comprises the following steps: softening a raw material; recovering the state of fresh leather; removing ingredients not required in processing of fur; after a first layer and a second layer of an overall-thickness limed skin are separated by a splitting procedure, feeding the second layer of the limed skin in a tanning rotary drum for deliming, softening and pickling; then adding 5% of a glutaraldehyde tanning agent in the rotary drum, rotating for 180 minutes, and carrying out permeation reaction fully until a leather center becomes yellowish; adding 200% of water, and controlling the temperature to be 45 DEG C; adding 0.2% of a rewetting agent, rotating for 60 minutes, and then draining water; continuing adding 150% of water, and controlling temperature to be 45 DEG C; adding 2% of sodium formate and 0.3% of sodium bicarbonate, rotating for 30 minutes, and controlling the PH value to be 5.4+ / -0.1; adding 2.5% of acid proteinase, rotating for 120 minutes, and then draining the water; carrying out a retanning technology; dyeing household leather; and carrying out fat liquoring.

The application of the invention discloses making equipment of chopped red peppers, and belongs to the field of red pepper processing. The making equipment comprises a mixing mechanism and a cutting and chopping mechanism, wherein the mixing mechanism comprises a mixing barrel, a discharging opening is formed in the bottom of the mixing barrel, and a push and pull plate is in slip connection to the discharging opening; the cutting and chopping mechanism comprises a material accommodating barrel, chopping knives and supporting rods; a barrel opening of the material accommodating barrel communicates with the discharging opening; the two supporting rods are fixedly connected with the bottom of the mixing barrel; a roller is rotatably connected to the bottom end of each of the two supporting rods; a transmission belt is in sleeving connection between the two rollers; a connecting rod is rotatably connected to each roller; the same horizontal rod is rotatably connected to one ends away fromthe rollers, of the two connecting rods; the lower surface of the horizontal rod is connected with the chopping knives; a base is arranged under the material accommodating barrel; a second motor is arranged in the base; and a fixing rod is connected between the base and the mixing barrel, and is located on the outer wall of the base and the outer wall of the mixing barrel. Through the adoption ofthe scheme of the making equipment of the chopped red peppers disclosed by the invention, the problem that in conventional chopped red pepper mechanical processing, the mouth feel of the made choppedred peppers is poor because red pepper pulp and red pepper skins are separated is solved.

A production method of polished tiles having a jade stone texture, wherein the polished tiles is prepared from following raw materials: high-whiteness albite powder being 5-10 wt% in the content of sodium, feldspar, clay, talcum being 28-32 wt% in the content of MgO, anorthite being 2.0-4.0 wt% in the content of CaO and bone ash being 45-50 wt% in the content of CaO. The production method includes following steps: powder producing, blank body moulding, high-temperature sintering and polishing. During the blank body moulding, firstly more than more than one stacks of a granular powder material is randomly arranged on a material arranging trolley in the form of a large-granular materials, and then a layer of mixed powder material is arranged at the periphery of the granular powder material. The powder materials are press-compacted by a press roller and then are cracked naturally, wherein the cracks are filled with a super-transparent jade material. Finally the prepared materials are fed into a die cavity for being compression-moulded. Compared with a method in the prior art, the production method is free of addition of a reinforcing agent and a whitening agent (such as zirconium silicate) which are harmful to environment. The polished tile has a super-transparent sense just like jade stone, is fine-and-smooth and has a layered sense, is clear in bottom pattern, and has such an excellent jade-like texture.