341results about How to "Improve degumming effect" patented technology

The invention relates to a method for producing a expanded silk wadding, which includes: sort cocoons, boil at high temperature, degelatinize, shuck the cocoons to remove silkworm, wash, loosen by drawing and make them into silk piece, dewater, dry and draw to make the silk wadding. The invention features that the cocoons before high temperature boiling process are vacuum soaked and expanded by a expanding liquor, concretely the cocoons before high temperature are suctioned into the expanding liquor heated by 80-95 degreeC under vacuum condition, soaked uniformly and expanded in slight boiling state. The said expand is made from amphoteric surfactant. The cocoons after being made into silk pieces and before dewatering are conducted an after finishing by a silk softening agent. Advantages: the patches and stem cubes resulted from un-uniform boiling or in-complete degelatinizing of cocoons are largely reduced; the silk floss is very soft because of full expanding.

The invention relates to a degumming method for hemp fiber, in particular to a method for combined application of chemical with super critical CO2 fluid degumming. Wherein, before carrying out super critical CO2 fluid degumming, the hemp fiber first goes through chemical treatment, then super critical degumming is carried out under low and hi pressure respectively. The invention can obviously reduce the non-cellulose composition for example lignin, etc. in hemp fiber, is of an ideal degumming effect, with obviously improved cellulose ratio, very good softening effect of fiber, hence improved process quality of hemp fiber; the invention additionally overcomes the shortcoming associated with prior degumming way such as high pollution, etc., and is of high economic efficiency.

The invention provides a method for rapid extraction of bamboo fiber from bamboo, and the bamboo fiber fully meets textile requirements. The preparation method for bamboo fiber belongs to the textile field. The preparation method for bamboo fiber comprises the steps of: bamboo sheet preparation, bamboo sheet cooking, crushing decomposition, bamboo filament cooking, bio-enzyme degumming, and after-treatment. The preparation method for bamboo fiber provided by the invention has the advantages of simplicity, short process, no pollution, environmental protection, low energy consumption, and obvious economic benefits.

The invention relates to a mechanical degluing method and a device of phloem fiber. The method of the invention comprises the following steps: 1) spreading and flatly paving phloem fiber in bundles, manually or mechanically feeding the phloem fiber between two rows of upper rollers and lower rollers in arrangement in pairs; 2) driving the upper rollers and the lower rollers to do alternating movement in the positive direction and the reverse direction through a motor, in addition, ensuring that the movement time in the positive direction is longer than the movement time in the reverse direction, and repeatedly extruding, kneading and forwards conveying the phloem fiber; 3) carrying out manual or mechanical oscillation and impurity removal through flapping on colloidal particles and dust on the phloem fiber at the same time of conveying the processed phloem fiber in the second step by a conveying belt; and 4) carrying out manual and mechanical shaking for further impurity removal on the processed phloem fiber in the third step, and then, packing the phloem fiber into bundles. The invention has the advantages of reasonable structural design, ideal degluing effect, small degluing pollution and safe and reliable operation, and can be widely used in the degluing process of phloem fiber, leaf fiber and gramineae fiber raw materials and the like.

The invention discloses a device and a method for degumming in SMT (surface mounting technology) industry, which are used for removing a coating layer on a PCB (printed circuit board) board. The device comprises an optical system, a platform motion system, a CCD (charge coupled device) visual positioning system and a control system, wherein the optical system is used for performing the alignment transmission on CO2 (carbon dioxide) lasers and finally focusing on material surface and is used for walking along the laser track within the region through optical scanning; the control system is used for controlling the optical system, the platform motion system and the CCD visual positioning system; the platform motion system is used for performing the laser spanned degumming process through the matching motions of a numerical control platform along X and Y directions; the PCB board is arranged on the numerical control platform of the platform motion system; and the optical system is arranged above the numerical control platform of the platform motion system. By using the method and device provided by the invention, the defects of mechanical degumming, such as the influence of the mechanical degumming on the quality of the product, are avoided, the stress problem of the mechanical degumming is solved and the better degumming effect is achieved.

The invention relates to a modified epoxy resin of monocrystalline silicon rod cutting glue. The modified epoxy resin of the monocrystalline silicon rod cutting glue comprises the following raw materials comprising a component A and a component B, wherein the component A comprises 35 to 78 percent of epoxy resin, 20 to 60 percent of toughening agent, 0.5 to 2 percent of defoaming agent and 0.5 to 3 percent of coupling agent; and the component B comprises 48 to 69 percent of polymerized mercaptan, 30 to 50 percent of alicyclic modified amine and 1 to 5 percent of accelerator. The modified epoxy resin has a high degumming property and can reduce sheet-falling rate. According to epoxy silane, toughness and temperature resistance of an alicyclic amine material are achieved and low surface tension of the whole system is achieved, so that the whole levelling property of the system is improved in the whole gluing process. A hydrolysis reaction can be performing on a silane bond and the hydroxy on the surface of glass and the surface of a silicon wafer, so that the adhesion to the surface of the glass and the surface of the silicon wafer is improved. In addition, the system is toughened, the water-absorbing rate of the system after the alicyclic amine is modified is increased and the heat-resistant temperature TG is reduced, so that a sheet-falling phenomenon does not exist in the cutting and spraying processes, and the resin can be degummed quickly in the process of heating to 40 to 50 DEG C in the state of high water absorbability and softening after heating. The modified epoxy resin is applied to monocrystalline silicon rod cutting and has an extremely important effect on the monocrystalline silicon wafer industry.

The invention relates to an epicoccum nigrum DB3 bacterial strain as well as a preparation and an application thereof. The preparation method comprises the steps of: 1, placing rotten sea grass in an enrichment culture medium, standing and culturing at room temperature, then coating the enrichment culture medium in a separation culture medium, standing and culturing at a temperature of 30 DEG C for 1-4 days to obtain a wild type flax biological treatment bacterial strain; 2, inoculating the bacterial strain obtained from the step 1 into a flax lignin nutrition culture medium, culturing at a temperature of 28 DEG C for 72 hours; and 3, selecting the bacterial strain with the capacity of degrading the lignin from the flax lignin nutrition culture medium to obtain the epicoccum nigrum DB3 bacterial strain. The epicoccum nigrum DB3 bacterial strain can be applied to a process for preparing spinning flax, hemp, jute or red ramie fibers through peroxide degumming. The epicoccum nigrum DB3 bacterial strain has the characteristics of short growth period, low possibility of being polluted, low treatment cost, mild reaction conditions, strong pollution resistance capacity, good heat-resistant performance, no environment pollution and good quality of the treated fibers. The preparation method has a simple process and is suitable for large-scale industrial production.

The invention relates to a bacillus cereus DA3 strain and a preparation method and application thereof. The strain has the capacity of producing pectinase and hemicellulase and has flax retting activity. The provided strain and a culture system can be directly used for flax retting and have the advantages that: the retting period is short, the fiber dispersion rate is 100 percent, the retting efficiency is 95 percent, and the strain is not easily polluted, and is low in treatment cost, high in fiber quality, mild in retting condition, high in pollution resistance, good in heat resistance, free of environmental pollution and the like. Compared with the prior art, the invention has the characteristics of simple technology, suitability for large-scale industrial production and the like, and has potential theoretical and practical significance for exploring flax retting of the bacillus cereus under the alkaline condition.

The invention discloses a hemp fiber freezing radiation auxiliary de-gumming technique, comprising the following steps of undergoing UV radiation, quenching, and heating treatment after hot bath, acid pre-etching, and pre-chlorination, and then undergoing base oxygen-mechanical associative de-gumming treatment, finally adding a softener for secondary scouring. The hemp fiber surface de-gumming effect treated by the technique is prior to ordinary base oxygen method and mechanical de-gumming, and the former meets the requirement of product of national first grade; the lignin content meets requirement of finishing technique after spinning, which obtains good whiteness and flexibility, and controls breaking strength and tensile stretch of fiber in requirement of spinnability, with improved length and fineness of fiber is improved, greatly improved serviceability, and less pollutant effluents discharged, so that the invention is environment-friendly.

The invention relates to a temporary adhesive for a solar energy crystal support and glass and a preparation method thereof. The temporary adhesive comprises component A and component B in weight ratio of 1:1, wherein the component A comprises the following raw materials in parts by weight: 50-80 parts of acrylate monomer, 8-30 parts of thermal expansion agent, 2-10 parts of accelerant, and 2-10 parts of thixotropic agent, the component B comprises the following raw materials in parts by weight: 50-80 parts of acrylate monomer, 5-25 parts of degumming factor, 2-10 parts of initiator, 0.01-0.5 part of polymerization inhibitor, and 2-10 parts of thixotropic agent. The temporary adhesive for the solar energy crystal support and glass has rapid bonding speed, is easy to remove, is environment-friendly and energy-saving, generates no harmful gas, and greatly improves the property of adhesive for crystal support and glass.

The invention discloses an electroplating manufacturing process, comprising the following steps of: A, utilizing a plasma degumming machine to carry out degumming treatment on residual resin in a back-drilled blind hole of a circuit board; B, carrying out primary copper deposition treatment on the back-drilled blind hole of the circuit board and then carrying out secondary copper deposition treatment to form a copper layer with the thickness of 0.3-0.5 microns in the back-drilled blind hole; and C, carrying out hole-filling electroplating on the circuit board to lead the thickness of the copper layer in the back-drilled blind hole to be more than 18 microns. According to the invention, by utilizing a plasma degumming way to treat the residual resin in the back-drilled blind hole of the circuit board, the problem that a chemical degumming speed is lower is solved, and the plasma degumming way has a good degumming effect and no residues; two times of copper deposition solve the problems that the thickness of deposited copper generated by the primary copper deposition is thin, and hollow copper depositing layers, broken copper or an open circuit is easy to generate in a process of storing or electrically pre-treating a board; and the thickness of the copper layer in the blind hole can reach to be more than 18 microns through the hole-filling electroplating, so that the thickness requirement of the back-drilled blind hole is met. Compared with the prior art, the electroplating manufacturing process provided by the invention effectively overcomes the quality defects that: the back-drilled blind hole cannot be completely degummed, the binding force is poor, and the copper in the hole is thinner and the like.

The invention discloses a method for preparing a YAG-based multilayer composite transparent ceramic by using Isobam gelcasting. The prepared multilayer ceramic satisfies a structure shown by a following formula: YAG/Re:YAG/YAG or YAG/Re: YAG/Re:YAG, wherein the YAG layer is composed of Y3A15O12, the Re:YAG layer is composed of (Y<1-x>Re<x>)<3>A<15>O<12>, x is more than or equal to 0.02 and is lessthan or equal to 0.2; Re is one of rare earth elements of cerium, praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium or ytterbium. The method comprises the steps that firstly Isobam gelcasting slurry is prepared, then the slurry is defoamed and is cast into a mold, after a first layer of the slurry gel is cured, the other layer of slurry is poured, the slurry is completely gelled, drying treatment is conducted, and the gel is discharged; biscuit after discharging the gel is vacuum sintered and annealed, and after double-sided polishing, the multilayer composite transparent ceramic is obtained. The method provided by the invention is mainly water-based slurry, green and environmentally friendly, and the obtained ceramic has the characteristics of high density, complicated structure, good optical quality, high transmittance, small interfacial ion diffusion range, and the method is very suitable for the preparation of the large size and composite YAG-based transparent ceramic material.

The invention relates to a degumming technology of natural bamboo fiber, and belongs to the technical field of plant fiber manufacturing. The technology comprises the steps that bamboo chips are pretreated to be hammered into thin filaments, then the thin filaments are sequentially subjected to the processes such as acid soaking, steaming, fermenting, enzymolysis, bleaching, oiling, softening, dewatering, opening and drying, and the natural bamboo fiber is prepared. Accordingly, the acid soaking-high pressure steaming-microbial degumming composite technology is adopted, the synergist effect is generated among the steps, therefore, the degumming effect of the natural bamboo fiber is improved, and the prepared fiber has the advantages of being high in degumming efficiency and little in damage to the fiber intensity.

The invention relates to a method for preparing fibrilia by using epicoccum nigrum DB3 strains. The method comprises the following steps: (1) preserving the epicoccum nigrum DB3 strains in a potato dextrose agar medium for cultivation, and adding a freezing buffer solution; (2) inoculating bacteria the amount of which equals to the pick-up amount of an inoculating ring, obtained in the step (1) into the potato dextrose agar medium, and carrying out shaking culture; (3) inoculating the culture medium obtained in the step (2) into a flax lignin fermentation medium, and carrying out shaking culture to obtain a fermentation bacteria liquid; (4) mixing sterilized fiber raw material with the fermentation bacteria liquid obtain in the step (3), carrying out table shaking and removing fermentation liquid to obtain the fibrilia; and (5) mixing the fibrilia with degumming liquid, processing and then rinsing, oiling and drying to obtain the fibrilia. The method in the invention has simple technology, short degumming time and high degumming efficiency, thus being suitable for large-scale industrial production.

The invention mainly relates to the technical field of silk processing, and discloses an environment-friendly silk degumming method, which includes immersion, enzymolysis, fermentation and washing. The method is simple, conditions are mild, high temperature and high pressure are not needed, energy is saved, the method is suitable for batch processing, the degumming rate can reach 89.3 percent, obtain silk is fine and smooth, the color is bright and white-yellow, and economic income can be increased by 12.7 percent. pH of immersed silk is regulated to be alkaline, lipase is added to decompose grease and wax components in the silk, high-temperature cooking is avoided, so that energy is saved, pH is then regulated to be acidic, bromelain is added, and enzymic preparations with different pHs are sequentially used for enzymolysis. The conventional joint use of alkaline protease and surfactant is changed, the environment is protected, soluble impurities under different pHs are sufficiently removed, sericin and remaining fat are decomposed, and the silk degumming rate is increased.

The invention discloses a silk degumming method, and relates to the technical field of silk processing. The silk degumming method comprises the following steps: A, injecting water in a refining tank, putting silk in the refining tank, heating to 98 to 100 DEG C, and keeping warm for 10 to 20 minutes; B, after regulating the water temperature to be 95 to 97 DEG C, adding 0.8 to 1.2 g/L of sodium carbonate, and keeping warm for 5 to 10 minutes; C, reducing the water temperature to be 40 to 45 DEG C, adding 1 to 2 g/L of 2709 alkaline protease, and stirring and hydrolyzing for 40 to 60 minutes under the condition that the pH (Potential of Hydrogen) is 9.5 to 9.8; D, washing for 15 to 30 minutes under the temperature of 60 to 70 DEG C, and then washing by cold water. According to the silk degumming method disclosed by the invention, the problem of an undesirable degumming effect of existing silk enzyme degumming is solved.

The invention discloses a high-gum-content raw hemp fiber degumming method. The method comprises a mechanical decortication and chemical immersion pre-degumming step, a steam explosion degumming step, a lignin oxidation degumming step and an ethanol boiling step. In the invention, based on the prior art, an independent lignin catalytic oxidation step is adopted, and chemical formula and technological conditions of a lignin catalytic oxidizer are improved to control the degradation degree of lignin, so that the lignin is partially degraded into non-water-soluble polyphenol substances, thus skillfully solving the problem that the lignin is sufficiently degraded into water-soluble monophenol and enters production wastewater. The polyphenol substances obtained after the degradation of the lignin are extracted through the subsequent ethanol boiling step, i.e. the polyphenol substances enter an ethanol solution and are subjected to simple distillation and purification to produce useful industrial byproducts. According to the invention, the method has the characteristics of favorable degumming effect, mild process, small fiber damage and the like; and the obtained fiber has high strength, favorable whiteness and high comprehensive quality.

The invention discloses an environment-friendly medical glue remover, made from, by weight, 80-98% of a solvent, 0.01-5% of a corrosion inhibitor, 0.01-5% of a surfactant, and 0.01-1% of a sterilizing preservative. A neutral formulation is used herein, the solvent is environment-friendly, no irritating odor is produced, and the environment-friendly medical glue remover can be a perfect substitute for glue removers made from toluene, ethyl acetate, tetrachloroethylene and the like, can protect an instrument during glue removal, and can also partly kill microorganisms on the instrument to prevent growth of harmful bacteria.

The invention particularly relates to an automatic glue scraping device applied to printing and packaging machinery. The automatic glue scraping device is characterized in that a middle scraper is arranged on an ejection rod of a first feeding air cylinder which is arranged at the front end of a middle scraper carrier; a left and right scraper carrier platform is arranged at upper ends of lower sliders which are arranged on a lower screw rod, and a left scraper carrier and a right scraper carrier are arranged on left and right sides of the front end of the left and right scraper carrier platform respectively; a left scraper is arranged on an ejection rod of a second feeding air cylinder which is arranged at the front end of the left scraper carrier; a right scraper is arranged on an ejection rod of a third feeding air cylinder which is arranged at the front end of the right scraper carrier; two supporting arms of the middle scraper carrier penetrate two supporting arm grooves, and the bottom of the middle scraper carrier is mounted on two linear bearing guide rails through linear bearings; a platform supporting column is arranged at the bottom of each of four corners of the left and right scraper carrier platform, and bottoms of the platform supporting columns are mounted on the two linear bearing guide rails through the linear bearings. The automatic glue scraping device has advantages of flexibility, convenience, high automation degree and effectiveness in glue removal.