408 results about "Whitening Agents" patented technology

The invention discloses unsaturated polyester resin for imitation jade handicrafts and a preparation method thereof, and belongs to the technical field of polyester resin. Comprising the following components: diethylene glycol, methylpropanediol, propylene glycol, maleic anhydride, phthalic anhydride, an antioxidant, a polymerization inhibitor, paraffin, a stabilizer, an ultraviolet light absorber, a whitening agent and a diluent. The weight ratio of the propylene glycol to the methyl propylene glycol is (1.0-1.3): 1, and the methyl propylene glycol accounts for 20-22% of the total amount of the dihydric alcohol; the weight ratio of maleic anhydride to phthalic anhydride is (0.46-0.52): 1; the preparation method comprises 1) adding the raw materials and the antioxidant into a reactor, carrying out heating, carrying out heat preservation for 0.5-1.0 h and continuing heating, 2) carrying out a reaction for 2-3 h after heating, carrying out dehydration until an acid value is 20-25 mgKOH / g, and 3) carrying out cooling, adding the auxiliary agent and carrying out uniform mixing so that the unsaturated polyester resin is obtained.

The invention discloses a whitening composition containing oxyresveratrol microcapsules as well as a preparation method and application of the whitening composition, and relates to the technical field of cosmetics. The invention provides a whitening composition. The whitening composition is prepared from the following components in parts by weight: 1 to 20 parts of oxyresveratrol microcapsules, 0.01 to 2 parts of gentiana rigescens extract, 0.1 to 10 parts of verbascos extract and 0.01 to 1 part of lupin extract, wherein the oxidized resveratrol microcapsule comprises a core material, a wall material, carrier oil and an emulsifier, and the weight ratio of the core material to the wall material to the carrier oil to the emulsifier is 1: (1-6): (1-8): (0.05-0.2). According to the oxidized resveratrol micro-capsule with the specific structure, active ingredients can penetrate into the deep layer of skin more deeply through a slow release mechanism, and by matching with other components, visible whitening and repairing effects can be achieved within a short time, and discomfort caused by a powerful whitening agent is reduced.

The invention relates to the technical field of whitening essence, and discloses whitening essence suitable for sensitive skin and a preparation method thereof.The whitening essence suitable for sensitive skin is prepared from, by mass, 2%-3% of prinsepia utilis royle oil, 1%-2% of portulaca oleracea extract, 1.5% of camellia yunnanensis flower extract, 0.5% of panax notoginseng root extract, 3% or less of nicotinamide, 1% or less of 1, 2-propylene glycol and the balance deionized water. 1%-1.5% of 1, 2-hexanediol, 0.1%-0.3% of sodium hyaluronate and 60%-70% of deionized water. According to the whitening essence suitable for the sensitive skin and the preparation method of the whitening essence, through the synergistic combination of prinsepia utilis royle oil (barrier repair), purslane (anti-inflammatory), camellia japonica (tyrosinase inhibition) and pseudo-ginseng (microcirculation improvement), melanogenesis is inhibited through multiple channels, the sensitive skin is relieved synchronously, nicotinamide (3%) is compounded with the prinsepia utilis royle oil, and the skin whitening effect is achieved. The synergism of whitening and barrier repair is enhanced through a dual mechanism of promoting ceramide synthesis and inhibiting melanin transport, and the problems that a traditional whitening agent has different degrees of irritation, allergy phenomena such as skin redness, swelling and pain are easily caused by improper use, and a skin intolerance phenomenon exists are solved.

The invention discloses a high-whiteness and high-non-ironing short-flow processing technology for polyester-cotton fabric, and belongs to the technical field of textile printing and dyeing. According to the technical scheme, the processing flow comprises singeing, desizing and scouring, chlorine bleaching, oxygen bleaching, mercerizing, liquid ammonia treatment, polyester whitening and non-ironing one-bath treatment, cotton whitening and softening. Wherein in the polyester whitening non-ironing one-bath process, a polyester whitening agent 1 is 3-5 g / L, a polyester whitening agent 2 is 2-4 g / L, a penetrating agent is 3-5 g / L, and resin is 80-120 g / L, and in the cotton whitening process, a cotton whitening agent is 10-20 g / L, and a penetrating agent is 3-5 g / L; in the softening process, the formaldehyde catching agent is 10-30 g / L, the penetrating agent is 2-5 g / L, and the softening agent is 10-30 g / L. According to the method, the technological process is simplified, the production cost is saved, the production efficiency is improved, the requirements of the current market can be well met under the condition that the quality is guaranteed, and the requirements of printing and dyeing processing of the future polyester-cotton fabric are met.

The invention discloses an organic / inorganic composite anti-ultraviolet polyamide 66 fiber master batch, a preparation method thereof and a functional fiber. The organic / inorganic composite anti-ultraviolet polyamide 66 fiber master batch is prepared from the following raw materials in parts by weight: 50-85 parts of polyamide 66 resin; 10 to 45 parts of an organic / inorganic composite anti-ultraviolet nano material; 0.5 to 10 parts of a fluorescent whitening agent; 0.2 to 5.0 parts of a dispersant; the organic / inorganic composite anti-ultraviolet nano material is prepared from an inorganic anti-ultraviolet material, a coupling agent and an organic ultraviolet absorbent. The fiber and the fabric which are made of the master batch have an anti-ultraviolet function, and also have higher strength, smaller fineness, soft luster, soft hand feeling and comfort.

The invention discloses a PP resin foaming optical diffusion plate and a preparation method thereof.The diffusion plate comprises an upper layer, a middle layer and a lower layer, the upper layer and the lower layer are located on the two sides of the middle layer, the thickness ratio of the upper layer to the middle layer to the lower layer is 1: (7-9): 1, and the upper layer and the lower layer are the same in composition; the upper layer is prepared from the following components in parts by mass: PP resin, PP-g-MAH resin, copolymer microspheres, a flame retardant, an antioxidant, mineral oil, a light stabilizer, an ultraviolet light absorber and a whitening agent; the middle layer is prepared from the following components in parts by mass: GPPS resin, a foaming agent, an antioxidant, mineral oil, a light stabilizer, an ultraviolet light absorber and a whitening agent, and the diffusion plate is stable in overall structure, good in optical performance and low in manufacturing cost.

The invention relates to the field of fluorescent whitening, and discloses a stilbene biphenyl whitening composition and a preparation method thereof, the stilbene biphenyl whitening composition comprises the following components by weight: 40-60 parts of a fluorescent whitening agent, 10-20 parts of modified montmorillonite, 3-8 parts of polyvinyl alcohol, 2-5 parts of a cosolvent, and 30-45 parts of deionized water; the modified montmorillonite is prepared by performing a grafting reaction on aminated nano montmorillonite and a polymer by utilizing a chemical reaction, and the polymer is prepared by mixing a quaternary ammonium salt antibacterial monomer, modified nano titanium dioxide, methyl methacrylate, butyl acrylate and maleic anhydride, and performing extrusion molding. According to the invention, the cotton fabric is endowed with excellent whitening effect, antibacterial property and washable effect by adding the fluorescent whitening agent and the modified montmorillonite, and the ultraviolet protection effect is good.

The invention relates to the technical field of resin, in particular to a preparation method of high-whiteness resin, which comprises the following steps: respectively preparing a mesoporous SiO2 (at) Eu < 3 + > whitening agent and a TiO2 photonic crystal whitening agent; the preparation method comprises the following steps: mixing two whitening agents according to a weight ratio of 1: 1-1: 4, carrying out surface modification, and carrying out melt blending with a resin matrix; an intelligent control system is adopted to regulate and control technological parameters in real time, and it is ensured that the whiteness is larger than or equal to 96 and the thermal decomposition temperature is larger than or equal to 380 DEG C. According to the preparation method, a mesoporous SiO2 (at) Eu < 3 + > whitening agent and a TiO2 photonic crystal whitening agent have a synergistic effect, and a silane coupling agent is adopted for surface modification, so that the whitening agents are more evenly and stably dispersed in a resin matrix, and the ultrahigh whiteness larger than or equal to 96 can be achieved; meanwhile, the yellowing risk is reduced, and the visual appearance quality of a resin product is greatly improved.

The present invention discloses a wear-resistant and tear-resistant polyamide elastomer composition and a preparation method and application thereof, and belongs to the technical field of modified materials. The wear-resistant and tear-resistant polyamide elastomer composition is prepared by weight from 87.1 to 95.9 parts of polyamide elastomer, 3 to 10 parts of wear-resistant agent, 0.2 to 1 part of cross-linking agent, 0.4 to 1 part of antioxidant, 0.1 to 0.6 parts of nucleating agent, 0.2 to 0.6 parts of dispersant, 0 to 2 parts of masterbatch, and 0 to 0.01 parts of fluorescent brightener. The present invention adopts polyamide elastomer as a substrate, and generates a cross-linking structure through a trifunctional cross-linking agent and an amide bond and / or an end group (amino, carboxyl, hydroxyl) in a polyamide elastomer molecular chain to improve the tear strength of the composition, and adds a polymer wear-resistant agent (PTFE and / or POM powder) to improve the wear resistance and resilience of the composition, so that the badminton racket line nails prepared by the composition of the present invention have playability and durability.

The present application relates to the technical field of resin, and relates to a preparation method of high-whiteness resin, respectively preparing mesoporous SiO2@Eu 3+ The two whitening agents are mixed in a weight ratio of 1:1 to 1:4, surface modification is carried out, and then the whitening agents are melt-blended with a resin matrix; an intelligent control system is used to real-time regulate process parameters, so that the whiteness is greater than or equal to 96, and the thermal decomposition temperature is greater than or equal to 380 DEG C; the present application realizes the synergistic effect of the mesoporous SiO2@Eu 3+ The whitening agent and the TiO2 photonic crystal whitening agent synergistically act, and surface modification is carried out by using a silane coupling agent, so that the whitening agent is uniformly and stably dispersed in the resin matrix, the whiteness of the resin product is greater than or equal to 96, the risk of yellowing is reduced, and the visual appearance quality of the resin product is greatly improved.

The invention relates to the technical field of grinding, in particular to a fluorescent whitening agent grinding device which comprises a fluorescent particle grinding machine shell. According to the fluorescent particle grinding machine, fluorescent whitening agent particles going to enter the fluorescent particle grinding machine shell can be hammered, so that the structural stability of the fluorescent whitening agent particles is destroyed, and a fluorescent whitening agent can be poured into a fluorescent whitening agent storage tank in a sealed environment through a sealed filling mechanism; according to the technical scheme, the fluorescent whitening agent can be prevented from drifting to the outside in the filling process, and meanwhile, the abrasion of the grinding disc during friction between the grinding disc and fluorescent whitening agent particles can be reduced; the grinding device for the fluorescent whitening agent solves the problems that a grinding disc used for grinding the fluorescent whitening agent is gradually abraded along with the increase of the service time of the grinding device for the fluorescent whitening agent, and part of the fluorescent whitening agent drifts into the air in the process that the ground fluorescent whitening agent is poured into a packaging tin or a packaging bag.

There is herein described a dissolvable oral strip or film. In particular, the present invention relates to a dissolvable or substantially dissolvable oral strip or film comprising at least one whitening agent and at least one oral hygiene agent. There is also described a process for the manufacture of a dissolvable or substantially dissolvable oral strip or film. There is further described a method of using a dissolvable oral strip or film comprising at least one whitening agent to whiten teeth and at least one oral hygiene agent that is effective against oral health conditions.

The invention relates to a PDLC (polymer dispersed liquid crystal) dimming film capable of displaying patterns in an electric control manner and a laser etching preparation method of the PDLC dimming film. The PDLC dimming film comprises a first substrate layer, a first conductive layer, a first orientation layer, a polymer dispersed liquid crystal layer, a second orientation layer, a second conductive layer and a second substrate layer which are sequentially stacked, the first substrate layer and the first conductive layer protrude at the first side end of the PDLC dimming film to form a first protruding part, and the second substrate layer and the second conductive layer protrude at the second side end of the PDLC dimming film to form a second protruding part; the first conductive layer and the second conductive layer are correspondingly and respectively provided with at least two parting lines extending from the first side end of the PDLC dimming film to the second side end of the PDLC dimming film; the first electrode is arranged between at least two adjacent segmentation lines on the first conductive layer of the first protruding part, and the second electrode is arranged between at least two adjacent segmentation lines on the second conductive layer of the second protruding part; the first alignment layer and the second alignment layer each contain a fluorescent whitening agent. The PDLC dimming film can save electricity and improve permeability.

The utility model discloses crystal membrane separation equipment for fluorescent whitening agent preparation, which belongs to the technical field of fluorescent whitening agent processing, and comprises a tank body, the top of the tank body is fixedly connected with a protective frame, the bottom of the protective frame is fixedly connected with a first motor and a second motor, the output end of the first motor is fixedly connected with a rotating shaft, and the output end of the second motor is fixedly connected with a rotating shaft. And the bottom end of the rotating shaft penetrates through the tank body and is fixedly connected with a first stirring frame. The device has the beneficial effects that by arranging the first motor, the first stirring frame, the second motor and the second stirring frame, placed raw materials and water are reversely and synchronously stirred, so that the raw materials and the water can be fully mixed, the crystallization effect of the raw materials is better, the materials adhered to the side wall of the tank body are cleaned, and by arranging a material guide plate and a material outlet, the crystallization effect of the raw materials is improved. Materials at the bottom of the inner wall of the tank body are cleaned, crystals are guided out after crystallization, and auxiliary heating is carried out during crystallization by arranging a heater and a heating piece.

The invention relates to the technical field of beauty and health care, and discloses a traditional Chinese medicine composition for whitening adult women, which comprises the following raw materials by weight: 10-15% of dahurian angelica root, 10-15% of bighead atractylodes rhizome, 10-15% of Poria cocos, 5-10% of pearl powder, 8-12% of Chinese angelica, 3-5% of licorice, 5-8% of safflower, 5-8% of wolfberry, 8-12% of Chinese yam and 10-15% of coix seed. According to the traditional Chinese medicine composition for whitening the adult females and the preparation method of the traditional Chinese medicine composition, multiple traditional Chinese medicinal materials with multiple effects of whitening, removing freckles, resisting oxidation, moisturizing and the like, such as radix angelicae, rhizoma atractylodis macrocephalae, pearl powder, radix angelicae sinensis and the like are adopted, and through scientific compatibility and proportion, the traditional Chinese medicinal materials can achieve a synergistic effect from multiple aspects, so that a comprehensive whitening effect is achieved; the skin care composition has the advantages that the skin care composition has anti-aging and moisturizing functions at the same time, comprehensive skin care is provided for users, pure natural traditional Chinese medicine components are selected, chemical whitening agents, essence and preservatives are not contained, irritation and side effects are effectively reduced, and the skin care composition is suitable for all skin types, especially adult women with sensitive skin, and milder whitening experience is provided.

The invention provides an ascorbic acid-S-glutathione conjugate, a derivative, a preparation method and application of the ascorbic acid-S-glutathione conjugate. The conjugate is obtained by activating ascorbic acid-6-hydroxyl by halogenation or sulfo group and then connecting the activated ascorbic acid-6-hydroxyl with sulfydryl of glutathione through thioether. The invention also discloses derivatives such as salts, esters, N-acylates, N-alkylates and the like of the compound. The stability of the series of compounds is greatly improved compared with that of vitamin C, and the whitening effect is obviously better than that of vitamin C and glutathione monomers. The invention also discloses a preparation method of the series of compounds and application of the series of compounds as antioxidants, whitening agents, nutritional supplements and the like in cosmetics, foods, feeds and medicines.

The invention relates to a fluorescent whitening agent, in particular to a stilbene biphenyl fluorescent whitening agent and a preparation method thereof. The stilbene biphenyl fluorescent whitening agent is a crystal represented by a formula (1), and contains crystal water or an isomer. The fluorescent whitening agent CBS provided by the invention comprises rod-shaped, needle-shaped and lamellar crystal forms. In the invention, all crystal forms are measured by adopting an X-ray diffractometer, and the water content is precisely measured by adopting a KarlFischer titration method. The X-ray scanning spectrum peak attributions of the crystal samples obtained by different preparation methods have significant difference. # imgabs0 #

The invention discloses a colored polyethylene fiber and a preparation method thereof, and belongs to the technical field of colored fiber preparation, the colored polyethylene fiber comprises the following raw materials by weight: 80-100 parts of composite polyethylene, 5-8 parts of antibacterial color master batch, 1-2 parts of an antioxidant, 1-2 parts of an ultraviolet light absorber, 2-3 parts of a lubricant and 1-2 parts of a flexibilizer; the antibacterial color master batch of the antibacterial whitening agent with quaternary ammonium salt and quaternary phosphonium salt structures and the silver-loaded titanium dioxide is prepared, a double-bond structure of the antibacterial whitening agent and the silver-loaded titanium dioxide cooperate to improve the wear resistance of the material, and the antibacterial whitening agent and the silver-loaded titanium dioxide improve the coloring uniformity of fibers by absorbing or reflecting natural light; and the degradation of the dye by microorganisms is obviously reduced through the composite sterilization effect, so that the color fastness grade of the fiber is improved.

The invention provides a tooth film. The tooth film comprises a stripping layer, a whitening layer and a backing layer, the stripping layer and the backing layer are polyolefin films; the whitening layer is prepared from the following components in parts by weight: 10 to 20 parts of a modified whitening agent, 15 to 35 parts of a thickening agent, 5 to 10 parts of a humectant, 0.3 to 0.8 part of a stabilizer, 0.1 to 0.5 part of a bacteriostatic agent, 1 to 3 parts of a modified anti-allergic agent and 0.5 to 1.5 parts of a pH regulator. The tooth film prepared by the invention has a good whitening effect, and is non-irritant and good in stability.

The invention relates to the technical field of tooth cleaning, in particular to a whitening tooth cleaning film and a preparation method thereof. The whitening and tooth cleaning tablet is prepared from the raw materials of a butterfly bean flower extract, the facial cleanser further comprises a pH regulator, a humectant, a cleaning abrasive, a surfactant, a conditioner, an anti-saccharification agent, a whitening agent, a forming agent and a release agent. According to the invention, the butterfly bean flower extract is innovatively introduced into the whitening and tooth cleaning tablet, besides conventional anti-inflammatory and anti-oxidation effects, the butterfly bean flower extract also has the characteristic of whitening teeth, and after the butterfly bean flower extract is added into the raw materials of the whitening and tooth cleaning tablet, the whitening effect of the tooth cleaning tablet on the teeth is obviously improved. Besides, a pH regulator, a humectant, a cleaning abrasive, a surfactant, a conditioner, an anti-saccharification agent, a whitening agent, a forming agent, a release agent and the like are also introduced into the formula, and the raw materials are compounded and matched in multiple directions, so that the prepared whitening and tooth cleaning film has a better whitening effect, and meanwhile, the effect of freshening breath for more than 12 hours can be ensured.

The invention discloses a functional master batch for demolding and a preparation method thereof. The functional master batch is characterized by comprising the following components in percentage by weight: 64-70% of nylon 6, 1-3% of stearic acid, 0.2-0.5% of an antioxidant, 2-5% of a nucleating agent, 1-3% of a toughening agent, 8-12% of calcium stearate, 6-10% of ethylene bis stearamide, 1-1.5% of white oil and 1-3% of a whitening agent. The mold release agent has the effects of improving the mold release property of a plastic product and being good in mold release capacity.

The invention relates to the technical field of skin care product raw materials, and particularly discloses a whitening composition as well as a preparation method and application thereof. The whitening composition is prepared from the following components in parts by mass: 29.6 to 35.4 parts of a solvent; 54 to 56 parts of a humectant; 0.9 to 1.1 parts of a whitening agent; 4.5 to 5.5 parts of a penetrating agent; 0.4 to 0.6 part of an antioxidant; 4.8 to 7.2 parts of a composite plant extract; the composite plant extract is prepared by compounding a polygonatum odoratum root extract, a glycyrrhiza glabra root extract and a rhodiola rosea root extract. The whitening mask has the advantage of further improving the whitening effect.

The utility model relates to the technical field of fluorescent whitening agent production, and discloses a filter pressing device for fluorescent whitening agent production, which comprises a decoloring cylinder, a sealing cover is arranged at the top of the decoloring cylinder, a mixing mechanism is arranged on the sealing cover, a lifting mechanism is arranged on the decoloring cylinder, and a filter pressing mechanism is arranged on the lifting mechanism. The mixing mechanism comprises a first motor, a locking assembly and an activated carbon placing box, the output end of the first motor is fixedly connected with a rotating shaft, the bottom of the rotating shaft movably penetrates through the sealing cover and extends into the decolorizing cylinder, the bottom of the rotating shaft is fixedly connected with a U-shaped stirring rod, and the two ends of the rotating shaft are fixedly connected with connecting rods respectively. And the locking assembly is used for mounting the activated carbon placing box on the connecting rod. According to the filter pressing device for producing the fluorescent whitening agent, when the rotating shaft rotates, the activated carbon placing box can rotate along with the rotating shaft, activated carbon can make full contact with the fluorescent whitening agent, the decolorizing efficiency is improved, and meanwhile the activated carbon placing box is convenient to replace.

The invention discloses a multiple emulsion as well as a preparation method and application thereof. The multiple emulsion is composed of an inner water phase, an oil phase and an outer water phase, the inner water phase is composed of a whitening agent and a humectant, the oil phase is composed of vegetable oil, an antioxidant and an emulsifier, and the outer water phase is composed of resveratrol-phosphorylated zein-carboxymethyl chitosan composite nanoparticles, a penetration enhancer and a humectant. The multiple emulsion provided by the invention has good stability, antioxidant activity and moisture retention, can effectively inhibit tyrosinase activity so as to achieve the effect of whitening the skin, is non-irritant to the skin, does not destroy the micro-ecological balance of the skin, is light in skin feeling, can be used in skin care products such as essence milk, face cream, facial masks and the like, and has a very good application prospect. The method is suitable for large-scale industrial production and application.

Oral care compositions and, e.g., oral care compositions providing improved stain resistance are disclosed herein. In accordance with an aspect, provided is an oral care composition including a whitening agent comprising from about 0.1 to about 10 wt.% of a peroxide; a cross-linked polyacrylic acid and / or a salt thereof; a polyol; and water in an amount up to 10 wt.%, wherein all weight percentages are based on the total weight of the oral care composition.

The invention discloses a method for preparing nano calcium carbonate by efficiently removing iron impurities in nano calcium carbonate raw material ore, and belongs to the technical field of nano material preparation. The method comprises the steps of raw material pretreatment, digestion treatment, size mixing treatment, carbonization treatment, surface treatment and drying, in the size mixing treatment process, a whitening agent Na2SO3 is adopted for removing iron in raw material ore, Na2SO3 serves as a reducing agent, Fe < 3 + > is reduced into Fe < 2 + >, a proper amount of whitening auxiliary such as DTPA or triethanolamine forms colorless water-containing iron chelate ions with iron ions, and the iron chelate ions are subjected to surface treatment. And through a synergistic system of the whitening agent and the whitening auxiliary agent, efficient removal of iron is realized. The whiteness of the prepared nano calcium carbonate reaches up to 97.2%, the nano calcium carbonate has the remarkable advantages of being efficient, environmentally friendly, economical and the like, the iron content in the nano calcium carbonate can be remarkably reduced, the purity and whiteness of the product are effectively improved, and the high requirement of the high-end application field for the quality of the nano calcium carbonate is met. Meanwhile, the method is simple and convenient to operate and easy to industrially apply, and has wide market prospects and popularization value.

The invention discloses a fluorescent whitening agent with high dispersion stability, a preparation method and an application method, and belongs to the technical field of textile printing and dyeing. The invention introduces a fluorescent whitening agent with the characteristics of small particle size, high stability, strong whitening ability and the like. The fluorescent whitening agent is a dispersion liquid composed of a whitening agent filter cake, a dispersing agent, a solvent, a thickening agent, water and the like. The whitening agent is applied to whitening processing of polyester and blended fabrics thereof, and can show higher whiteness under the condition of lower dosage; and even under the condition that a leveling agent is not added, a uniform whitening effect can be obtained, fluorescent spots or yellow spots are not formed, and high-quality whitened fabric can be obtained.

The invention belongs to the technical field of detergents, and particularly relates to a preparation method of a composite fluorescent whitening agent. The method comprises an acylation reaction, a sulfonation reaction, a carbonyl reduction reaction, a dehydration reaction and a sulfonic acid salification reaction. Compared with a commercially available fluorescent whitening agent such as CBS, the composite fluorescent whitening agent synthesized by the preparation method disclosed by the invention has similar application effects, but the preparation process disclosed by the invention is simple, low in cost, environment-friendly in route and environment-friendly in working environment.

The utility model relates to the field of stirring equipment, and discloses stirring equipment for fluorescent whitening agent production, which comprises a mounting box, a limiting plate is slidably connected in the mounting box, the top end of the limiting plate is fixedly connected with a stirring barrel, and two connecting rods are fixedly connected outside the mounting box. The top ends of the two connecting rods are fixedly connected with sliding blocks, the ends, away from the connecting rods, of the sliding blocks are fixedly connected with blocking columns, and the top ends of the blocking columns are slidably connected with feeding pipes. According to the feeding device, the sliding block is pushed by the connecting rod to push the blocking column upwards, and when discharged materials reach the maximum weight, the feeding pipe is completely blocked by the blocking column, so that the effect of accurate feeding is achieved, the stirring amount is effectively controlled, and the problem that stirring equipment is damaged due to non-uniform mixing caused by excessive feeding or too heavy materials is avoided; and meanwhile, the production requirement can be met at a time, the production efficiency is improved, and the energy consumption is reduced.

The invention discloses a spore fluorescent staining solution and application thereof. The fluorescent whitening agent 220 is used for detecting spores; the spore fluorescent staining solution provided by the invention comprises a fluorescent whitening agent 220. The spore fluorescent staining solution disclosed by the invention is simple in component, low in cost, capable of accurately detecting spores in a sample to be detected, low in toxicity and small in influence on the environment; the detection method disclosed by the invention is simple and convenient to operate and rapid in determination and can be completed by one-step operation.