95 results about "Curtain coating" patented technology

The invention discloses a PBAT (poly (butylene adipate-co-terephthalate)) composite material containing nano encapsulation enzyme as well as a preparation method and application thereof. The PBAT composite material is prepared from the following components in percentage by mass: 50 to 90 parts of PBAT resin, 0 to 40 parts of filler and 0.01 to 20 parts of nano encapsulation enzyme. The preparation method comprises the following steps: firstly synthesizing the nano encapsulation enzyme, and then mixing the nano encapsulation enzyme, the PBAT resin and the filler, extruding, and carrying out hot press molding or curtain coating and film blowing. The method is characterized in that 1) the nano encapsulated enzyme has more excellent thermal stability than other immobilized enzymes, and the biological activity of the enzyme can be effectively maintained after high-temperature heat treatment; and 2) as the biological activity of the enzyme is effectively reserved, the PBAT composite material containing the nano encapsulated enzyme has higher environmental degradation speed than pure PBAT or a PBAT composite material containing free enzyme, and the environmental degradation speed can be reflected in various conditions such as aqueous solution and industrial compost.

The invention relates to an ultraviolet deoxidizing and fresh-keeping packaging material and application thereof, and belongs to the technical field of packaging materials. According to the invention, trimethylolpropane triacrylate and ethylenediamine are used as raw materials, a hyperbranched polymer with terminal double bonds is constructed based on Michael addition, then a sulfydryl-containing hindered amine light stabilizer obtained by ester exchange of methyl thioglycolate and pentamethylpiperidinol is added, and the hindered amine light stabilizer and alkyl mercaptan are subjected to a sulfydryl-alkene click reaction together. The light stabilizer and plastic are subjected to melt blending and then subjected to curtain coating to form a film to serve as an outer layer, and one face of the outer layer is coated with coating liquid prepared from a dispersing agent, PET, an active substance capable of generating triplet excitons under irradiation of ultraviolet light, an antioxidant, an ultraviolet light absorber and a stabilizer. When the ultraviolet deoxidization fresh-keeping packaging material is applied to packaging of articles, deoxidization can be achieved through irradiation of ultraviolet light, and the degradation effect of the ultraviolet light on the outer layer is very little.

The invention discloses a multifunctional fully-degradable mulching film with water taking, slow release and soil improvement functions and a preparation method thereof, and belongs to the technical field of agricultural mulching films. The method comprises the following steps: preparing a PVA aqueous solution; the preparation method comprises the following steps: extracting a 3-8wt% nano cellulose solution from plant fibers by a two-step DES method; preparing a silicon source dispersion liquid; adding 10 parts of a nanocellulose solution, 1.25 parts of a silicon source dispersion liquid and 20 parts of glycerol into 100 parts of a PVA aqueous solution to obtain a film coating liquid; adding humic acid and an ion-based fertilizer into the film coating liquid, uniformly mixing, and carrying out curtain coating and drying to form a base film; the preparation method comprises the following steps: preparing 8-12wt% of a hydrophobic degradable material solution, and performing electrostatic spinning on a base film by using the solution to form a Janus structure, thereby obtaining the multifunctional full-degradable mulching film which can realize water extraction from air. The device has a function of taking water from air and a fertilizer slow release function, can release different fertilizers in a gradient manner, and meets the requirements of plants in different growth cycles. After being used, the soil conditioner can be directly turned into soil, the rest part directly acts with the soil, and PVA and humic acid synergistically improve the soil environment.

The invention belongs to the technical field of degradable and high-barrier modified plastics, and particularly relates to an environment-friendly, high-oxygen-barrier and water-resistant modified plastic, a plastic alloy and a functional product of the environment-friendly, high-oxygen-barrier and water-resistant modified plastic and the plastic alloy. According to the material, polyvinyl alcohol is used as a main component and is blended with auxiliaries such as a plasticizer and a cross-linking agent through a twin-screw melt extrusion technology, and modified plastic (HB-PVOH) with excellent barrier property, water resistance and mechanical property is formed. In order to further enhance the performance, the HB-PVOH can be co-extruded with polymers such as polyhydroxyalkanoate, polymethyl ethylene carbonate, polylactic acid, poly (butylene succinate) and the like to prepare binary or ternary plastic alloy. The material can be widely applied to the fields of high-end packaging, oxygen barrier coatings, environment-friendly packaging and the like, plastic or paper-plastic composite products are prepared through a multi-layer co-extrusion-film blowing, curtain coating or film spraying technology, the sustainable development trend of aluminum reduction, plastic reduction and fluorine reduction is met, and the material is a green packaging solution which is high in cost performance, environmentally friendly and practical.

The invention firstly provides a structure of environment-friendly bottomless paper type thermo-sensitive paper. The structure comprises a base material, and a thermo-sensitive coating and a silicone oil layer which are sequentially laminated on one surface of the base material, the thermosensitive coating comprises a color developing layer, a pre-coating layer and a bottom coating layer which are laminated in sequence, and the bottom coating layer is laminated on one surface of the base material; secondly, a coating system is provided, and a color developing agent comprises 4, 4 '-sulfonyl diphenol; the invention also provides a preparation method which is used for preparing the thermo-sensitive paper by adopting the structure and the coating system, and comprises the following steps: coating the color developing layer on the surface of the pre-coating layer by using curtain coating; a novel structure is designed, a basis is provided for the self-curling release performance of the thermo-sensitive paper, a coating system uses 4, 4 '-sulfonyldiphenol, so that the color saturation, the light resistance and the stability of the thermo-sensitive paper can be improved, the thermo-sensitive paper does not react with silicone oil, the release performance is improved, a curtain coating method is adopted based on the structure and the coating system, and the self-curling release performance of the thermo-sensitive paper is improved. And the coating uniformity, color development and other properties of the thermo-sensitive paper are effectively improved, and the environment-friendly thermo-sensitive paper which is fast in reaction, bright in color and high in definition during printing is integrally formed.

The invention discloses a hot-melt type renewable phenolic resin and a preparation method thereof, and a hot-melt type renewable phenolic resin-based ablation-resistant composite material and a preparation method and a regeneration method thereof. The preparation method comprises the following steps: carrying out a melting reaction on a polyhydroxymethyl phenol compound and a dithiol compound to prepare the hot-melt type renewable phenolic resin; the preparation method comprises the following steps: heating hot-melt renewable phenolic resin so as to form a resin adhesive film through curtain coating, laminating the resin adhesive film and a fiber reinforcement body, passing through a roller, rolling to obtain a molten phenolic resin prepreg, and carrying out hot-press molding on the hot-melt phenolic resin prepreg to obtain the hot-melt renewable phenolic resin-based ablation-resistant composite material. The catalyst can be regenerated through an aprotic polar solvent dissolution-precipitation process. The prepared hot-melt renewable phenolic resin has the advantages of efficient repair, wide and adjustable viscosity range, high thermal decomposition temperature and high char yield, and endows the hot-melt renewable phenolic resin-based ablation-resistant composite material with reproducibility, self-repair property, ablation resistance and good mechanical properties.

The invention discloses a degradable fruit and vegetable fresh-keeping composite material based on multi-mechanism synergy and a preparation method thereof, and belongs to the technical field of food packaging materials, the degradable fruit and vegetable fresh-keeping composite material comprises the following components by weight: 35-45 parts of a biopolymer matrix, 12-18 parts of mechanical reinforced fiber, 18-25 parts of an ethylene catalytic scavenger, 8-12 parts of a slow-release preservative, 4-6 parts of glycerin, and 1.5-2.5 parts of citric acid; the preparation method comprises the following steps: respectively preparing the ethylene catalytic scavenger and the slow-release preservative; constructing basic gel; the functional components are uniformly dispersed in the gel, and the composite membrane material is prepared through curtain coating, drying, crosslinking and ultraviolet post-treatment. Through collaborative design of carrier loading, molecular embedding and nano-enhancement, efficient removal of ethylene, long-acting slow release of antibacterial and antioxidant activity, remarkable improvement of mechanical properties and unification of all-component biodegradation are realized, the shelf life of fruits and vegetables is effectively prolonged, and the preparation method is suitable for preparation of green packaging products.

The invention discloses a corona-resistant polyimide film based on a core-shell structure nano SiO2 (at) PS filler and a preparation method of the corona-resistant polyimide film, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: dissolving diamine in a solvent under the protection of an inert atmosphere to obtain a diamine solution; preparing a nano SiO2 (at) PS filler dispersion liquid with a core-shell structure; adding the nano SiO2 (at) PS filler dispersion liquid into a diamine solution, fully stirring, and adding dianhydride to obtain polyamide acid resin; and carrying out vacuum negative pressure defoaming on the polyamide acid resin, and then carrying out curtain coating, stretching and imidization to obtain the corona-resistant polyimide film. The preparation method comprises the following steps: carrying out surface amination on a nano SiO2 filler, fixing an ATRP (Atom Transfer Radical Polymerization) initiator, and carrying out surface initiation on ATRP grafted polystyrene to obtain a nano SiO2 (at) PS filler with a core-shell structure; the nanofiller SiO2 (at) PS can effectively avoid the agglomeration phenomenon and is easier to disperse, meanwhile, the nanofiller SiO2 (at) PS has better compatibility in a polyamide acid solution system, and the prepared corona-resistant polyimide film has more uniform corona resistance, insulation and mechanical properties.

The utility model discloses a multifunctional spraying and shower coating all-in-one machine, and relates to the technical field of evanescent mode coating, the multifunctional spraying and shower coating all-in-one machine comprises a containing mechanism, one end of the top surface of the containing mechanism is provided with a spraying mechanism, the containing mechanism comprises a moving wheel, the outer surface of the moving wheel is rotatably connected with a rotating shaft, the top surface of the rotating shaft is rotatably connected with a fixing plate, and the fixing plate is provided with a spraying mechanism. The top faces of the fixing plates are fixedly connected with a material containing hopper, the number of the fixing plates is four, and the four fixing plates are neatly distributed on the bottom face of the material containing hopper. The spraying mechanism can be installed on the side face of the material containing hopper through the installation plate, paint can be directly added into the paint storage bin through the top cover, a spray gun can be connected to the outer surface of the discharging valve, and therefore the paint can be evenly sprayed to the surface of a model through the spray gun; and through cooperation of a recycling pipe and a water pump, redundant paint can be pumped into the paint storage bin through a material conveying pipe to be recycled.

The invention discloses a polyving akohol-based composite film with multiple functions and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite film is prepared by taking polyvinyl alcohol (PVA) as a matrix and introducing an iron-tannic acid coordination complex (Fe-TA) and nano zinc oxide (ZnO NPs). The preparation method comprises the following steps: preparing a PVA solution; the preparation method comprises the following steps: coordinating ferric chloride hexahydrate with tannic acid to form a Fe-TA complex solution, and compounding the Fe-TA complex solution with a PVA solution; and adding the nano-zinc oxide dispersion liquid into the composite liquid, and carrying out defoaming, curtain coating and drying to form the film. Through the synergistic effect of Fe-TA and ZnO NPs, the problems that a pure PVA film is high in hydrophilicity and single in function are effectively solved. The obtained composite film has excellent mechanical strength, high oxygen and water vapor barrier property, efficient near-infrared light thermal response capability and long-acting antioxidant activity, and has wide application prospects in the fields of food active packaging, intelligent packaging and the like. The method is simple in process, environment-friendly and easy for large-scale production.

A system and method for producing a porous electrode with a high level of porosity, preferably mesoporosity, without the use of a binder. The electrode is formed by depositing a layer on a substrate from a colloidal suspension containing aggregated or agglomerated nanoparticles. Deposition methods include electrophoresis, ink-jet printing, doctor blade, roll coating, curtain coating, or dip-coating. The process includes drying and may involve additional consolidation steps such as pressing and / or heat treatment to enhance structural integrity, electrical conductivity, and adhesion. The heat treatment induces partial coalescence of nanoparticles, creating a three-dimensional porous structure that facilitates ion mobility. A thin coating of an electrically insulating or ion-conductive material may be applied to reduce interfacial reactions. The resulting porous electrode may be used in energy storage applications, such as lithium-ion batteries. The invention also includes a method for manufacturing batteries utilizing these electrodes and related battery designs.

The invention discloses a curtain coating paint additive and a preparation method thereof. The curtain coating paint additive comprises the following components and the weight proportion of each component is: 0.1 to 1 part of a viscous component, 10 to 15 parts of a surfactant, and 0.1 to 10 parts of a thickener. By adding a surfactant, PVA and a polymer thickener to the coating, the problem of poor product quality stability caused by the curtain jumping phenomenon is solved, the coating omission and rework in production are reduced, and the consistency of the product is improved.

The invention relates to a device for applying a treatment substance, in particular starch or size, to a moving paper and board web (11), in particular to a containerboard or corrugated board, by means of at least one curtain coating mechanism (2.1, 2.2). In order to provide an improved treatment substance coating device, the at least one curtain coating die can be supplied with differently prepared treatment substances, and the curtain coater (2.1, 2.2) combines both a film mode of operation and a slot mode of operation by providing an electrically and / or mechanically drivable gap adjustment device (3.1, 3.2) for the outlet gap (14.1, 14.2) of the control die lip applied to the curtain coating die, and optionally sets the outlet gap (14.1, 14.2) to 100 μm to 500 μm in the film mode of operation or to 500 μm to 2.0 mm in the slot mode of operation, so that the at least one curtain coating mechanism (2.1, 2.2) is designed to be able to be operated in two different modes of operation.

The invention discloses a die-casting forming die for machining a copper alloy sealing disc, and belongs to the technical field of die-casting formation.The die-casting forming die comprises a first die base, a second die base and a die-casting driving unit, a first die core is installed in the first die base, and a second die core is installed in the second die base; the first mold base is configured to move towards the second mold base so that the first mold core can be attached to the second mold core. The first heat exchange plate is controlled to slide in the heat exchange sleeve to be separated from the second heat exchange plate, the contact heat exchange efficiency is reduced, molten metal injected into the second mold core is continuously and fully cast in a heat preservation state, flow speed control over a heat exchange medium in the heat exchange pipe is matched, and the instantaneity of switching between a heat preservation system and a heat dissipation system is fully improved; and heat preservation control after curtain coating heat exchange of the heat exchange medium in the heat exchange tube or sufficient heat absorption is not needed.

The invention relates to a shading ultraviolet-proof tarpaulin material and a preparation method thereof, and belongs to the technical field of tarpaulin materials, and the shading ultraviolet-proof tarpaulin material is prepared by the following steps: combining thiazolopyridine dicarboxylic acid with gallic acid, and then grafting polypropylene glycol monomethyl ether to obtain a plasticizing material; phosphonitrilic chloride trimer is combined with the plasticizing material, and the flame-retardant plasticizing material is obtained; graphene oxide is combined with a flame-retardant plasticizing material, so that an anti-ultraviolet auxiliary agent is obtained; the preparation method comprises the following steps: mixing an anti-ultraviolet auxiliary agent and polyvinyl chloride, melting, plasticizing and extruding, coating the mixture on the upper and lower surfaces of base cloth through curtain coating, cooling, sizing and coiling to finally prepare the shading and anti-ultraviolet tarpaulin material. According to the technical scheme, after the phosphonitrilic chloride trimer is combined with the plasticizing material, the graphene oxide is combined, and the prepared anti-ultraviolet auxiliary agent is added into the polyvinyl chloride, so that the mechanical property and the anti-ultraviolet property of a polyvinyl chloride matrix are improved, the flame retardant property of the polyvinyl chloride matrix is also improved, and the comprehensive performance of the tarpaulin material is overall improved.

The invention provides three-dimensional wave-absorbing honeycomb forming equipment. The three-dimensional wave-absorbing honeycomb forming equipment comprises a material table; the portal frame is arranged above the material table in a spanning mode. The numerical control displacement module is fixed to the portal frame and used for driving the machine head to move relative to the material table top. The prefabricated body storage bin is communicated with the machine head through a prefabricated body conveying module; the assembling turntable module is arranged between the prefabricated body storage bin and the prefabricated body conveying module and is used for driving the prefabricated body storage bin to be aligned with the prefabricated body conveying module; the honeycomb morphology feature detection module is fixed with the machine head and is used for generating a feeding track arrangement diagram; and the machine head puts preforms into the to-be-processed wave-absorbing honeycomb according to the feeding track arrangement diagram. By implementing the method, single holes in the wave-absorbing honeycomb can be subjected to shower coating, effective 2D plane electromagnetic separation surface design is formed, and the implementation reliability of a 3D electromagnetic separation surface design process is displayed; the problems of limitation of a traditional technology and errors of manual machining are solved, and the equipment blank in the technical field is filled up.

The utility model discloses a film coating device for processing a color-changing PEVA waterproof transparent film shower curtain, and relates to the technical field of film coating devices. The film coating device for processing the color-changing PEVA waterproof transparent film shower curtain comprises a bottom plate, a film coating pool is fixed to the upper portion of the bottom plate, a feeding roller is rotationally installed at one end of the film coating pool, and a winding roller is rotationally installed at the end, away from a shower curtain frame, of the film coating pool; the collecting box communicates with one end of the collecting box through a conveying pipe, a first valve is installed on the conveying pipe, and the collecting box is used for collecting a large amount of residual paint; the discharge pipe is installed at the end, away from the conveying pipe, of the film coating pool, a second valve is installed on the discharge pipe, and the discharge pipe is used for discharging cleaning wastewater; according to the shower curtain coating device, the scraping plate and the collecting box are arranged, so that after the shower curtain coating work is finished, residual coating can enter the collecting box through the conveying pipe to be recycled.

The invention relates to the technical field of cast film production, in particular to a cast film pasting device, a thin film casting device and application. The curtain coating film pasting device sequentially comprises an air inlet structure and an air outlet structure according to the airflow trend. The air outlet structure sequentially comprises an internal air outlet structure, a cylindrical air cavity structure, a transition air duct structure with a gradually-changed section and an air nozzle structure according to the airflow trend. Side plates are arranged at the positions, close to the air inlet structure, of the two ends of the air outlet structure correspondingly. A width adjusting device is arranged on the side plate; by means of the unique design and matching of the air inlet structure and the air outlet structure of the casting film pasting device, airflow can act on a viscous flow state film material in a casting state more uniformly, stably and adjustably, so that the film material is better and tightly pasted on a cooling roller, the defects of wrinkles, bubbles and the like of a film are reduced, and the service life of the film is prolonged. And the pasting quality is improved.

The utility model discloses chemical paint fading equipment for airplane components. The chemical paint fading equipment comprises an equipment outer cover, and a dip coating tank, a curtain coating tank, a reaction tank, a washing and air drying tank, a paint fading agent storage tank and a single-arm gantry manipulator which are arranged in the equipment outer cover, the dipping and coating groove is used for dipping and coating a paint fading agent in the dipping and coating groove; the curtain coating groove is used for curtain coating of a paint fading agent in the curtain coating groove, and a spraying pipe is arranged in the curtain coating groove; a spraying pipe in the curtain coating tank is connected with a liquid outlet of the paint fading agent storage tank through a spraying pump, and a liquid outlet of the spraying pipe is also connected to a waste liquid inlet of the paint fading agent storage tank, so that a circulating spraying system is formed; the reaction tank is used for carrying out paint fading reaction on the aircraft component treated by the dip coating tank or the curtain coating tank; a spraying air-drying pipe is arranged in the washing air-drying tank and is used for washing and water-cutting air-drying the airplane parts subjected to the paint fading reaction; and the single-arm gantry manipulator is used for driving the aircraft parts to move into the grooves for treatment.

The invention relates to a cooking-resistant easy-to-tear composite film and a preparation method thereof. The cooking-resistant easy-to-tear composite film is formed by integrally connecting a polyolefin heat-sealing layer, an easy-to-tear layer, a core layer and a composite layer through co-extrusion film blowing or curtain coating. And the polyolefin heat sealing layer is made of a polypropylene mixture and is added with 2-6% of opening smooth master batch. The easy-to-tear layer consists of a hydrogenated polystyrene elastomer, polybutylene and maleic anhydride grafted polypropylene. And the core layer is made of polypropylene or olefin copolymer. And the composite layer is made of corona-treated polyolefin. According to the preparation method, the composite film is prepared through multi-layer co-extrusion casting, can tolerate high-temperature cooking at 135-141 DEG C for 40 minutes, is stable in heat sealing strength, is free of wiredrawing phenomenon when being uncovered, is uniform in blank leaving, is suitable for packaging of metal cans, standing pouches and the like, and meets the high-sterilization requirements of cooked food, milk powder and the like.

The utility model discloses a plastic extrusion lamination composite unit stand column reel changing and unwinding device which comprises a first fixing plate, a discharging reel is arranged on the side face of the first fixing plate, a clamping device is arranged at the other end of the discharging reel, a second fixing plate is arranged on the side face of the clamping device, and a first fixing plate and a second fixing plate are arranged on the second fixing plate. And a moving device is arranged below the second fixing plate. By means of the structure, the problems that when a traditional roll changing and unwinding device is used for disassembling a winding roll or an unwinding roll, tedious steps are usually needed, and a large amount of manual operation is needed can be solved, the problems that the working intensity of workers is greatly increased, and the working efficiency is reduced are solved, and the working efficiency is improved. By means of the roll changing and unwinding device, the problem that when part of roll changing and unwinding devices are used for assembling the winding rolls or the unwinding rolls, the winding rolls or the unwinding rolls which are manually placed generally incline can be solved, the problem that the quality of subsequent machining is reduced is solved, and the problem that the practicability of the device is reduced is solved.

The invention relates to a method for producing a porous electrode, comprising a layer deposited on a substrate, said layer being free of binder and having a porosity greater than 30% by volume and preferably less than 50% by volume and having pores with an average diameter of less than 50 nm, said method being characterized in that: (a) a colloidal suspension is provided, which comprises aggregates or agglomerates of nanoparticles of at least one material P, said nanoparticles having an average primary diameter D 50 (a) depositing a porous electrode layer, preferably a mesoporous electrode layer, on the substrate from the colloidal suspension provided in step (a) by electrophoresis, by inkjet printing, by doctor blading, by roller coating, by curtain coating or by dip coating; (d) drying the layer obtained in step (c), preferably drying under air flow; and (e) optionally, consolidating the porous electrode layer, preferably the mesoporous electrode layer, manufactured in step (d) by pressing and / or by heating.

The invention relates to the technical field of curtain coating film forming and profiling, and provides curtain coating film forming and profiling equipment for composite non-woven fabric and a profiling production technology.The curtain coating film forming and profiling equipment for the composite non-woven fabric comprises a sliding rail, a tension adjusting mechanism and a rapid temperature adjusting mechanism, and when an extrusion system slides, a molten material can be driven to move; the tension adjusting mechanism is arranged on the side, close to the pressing position of the molten material, of the extrusion system, the tension adjusting system can supply air to the molten material, and the rapid temperature adjusting mechanism is fixedly connected to the machine body frame and can adjust the temperature of the molten material to be adjusted. The extrusion system is arranged between the tension adjusting mechanism and the rapid temperature adjusting mechanism, the rapid temperature adjusting mechanism can make contact with the tape casting forming system, the surface temperature of the tape casting forming system is rapidly adjusted, and the technical problem that in the prior art, the thickness difference of concave-convex positions of lines on non-woven fabric is large during tape casting film forming pressing is solved.

The utility model relates to the technical field of leveling platforms, in particular to an electronic product shell leveling platform which comprises a supporting plate, supporting legs are welded to the four corners of the lower surface of the supporting plate, baffles are welded to the left end and the right end of the rear side of the upper surface of the supporting plate, and a curtain coating mechanism is installed in the middle of the rear side of the upper surface of the supporting plate. A control mechanism is installed in the middle of the upper surface of the supporting plate, a fixing mechanism is fixedly connected into the control mechanism, and an adsorption mechanism is installed on the lower side of the fixing mechanism. The angle of the fixing mechanism can be adjusted to a certain extent through the control mechanism, the upper surface of an electronic product placed in the fixing mechanism can be ensured to be in a horizontal state in cooperation with the gradienter, and the angle of the electronic product can be adjusted by adjusting the position of the adjusting mechanism and the position of the connecting mechanism. And the angle of the fixing mechanism can be adjusted more finely.

The invention relates to an ultra-thin iodine polaroid, a preparation method and an ultra-thin circular polaroid, and the ultra-thin iodine polaroid comprises polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol and iodine and / or potassium iodide dispersed in the polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol in a dissolving manner. According to the invention, iodine and / or potassium iodide are / is dissolved and dispersed in polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol, and the ultrathin iodine polarizer is finally obtained through the steps of material mixing, distillation, extrusion, coating, curtain coating, one-way calendering, stretching and drying. On the first aspect, iodine and / or potassium iodide are dispersed more uniformly by adopting a dissolving and dispersing mode, so that the degree of polarization and the light transmittance of each part of the polaroid are guaranteed; on the second aspect, the polaroid does not need to be clamped and fixed by a cellulose triacetate film, so that the thickness of the polaroid can be further reduced; and thirdly, a retarder is compounded on the ultra-thin iodine polaroid, so that the purpose of manufacturing the ultra-thin circular polaroid is achieved.

The utility model discloses an environment-friendly laminating and coating device for a paper-plastic composite bag, which belongs to the field of composite bag production and comprises a composite bag laminating and coating device connecting bottom plate total component, and one side of the composite bag laminating and coating device connecting bottom plate total component is fixedly connected with a telescopic rod. A coating head assembly is fixedly connected to one side of the telescopic rod, a limiting guide plate is fixedly connected to the side, connected with the bottom plate total component, of the composite bag film coating device, and a supporting arm is fixedly connected to the side, connected with the bottom plate total component, of the composite bag film coating device; through cooperative use of the devices, when a user needs to conduct coating, the user needs to place a composite bag on a transmission roller, after the user places the composite bag, the user needs to turn on an output motor, and after the output motor is started, the transmission roller fixedly connected to the top end of an output shaft of the output motor in a sleeving mode can be driven to rotate; in this way, the compound bag can be used and transmitted through the transmission roller.

A preparation method of an anisaldehyde microcapsule / polyvinyl alcohol composite film applied to carrot preservation comprises the following steps: firstly, preparing anisaldehyde emulsion: weighing starch, slowly adding distilled water, heating under stirring until the starch is completely gelatinized, and cooling to room temperature; the preparation method comprises the following steps: weighing chitosan, adding an acetic acid solution, placing in a water bath kettle, heating under magnetic stirring at 90 DEG C until the materials are dissolved, and cooling to room temperature; uniformly mixing the two materials to serve as a wall material of the microcapsule; respectively adding anisaldehyde into the wall materials, and homogenizing the mixed solution at a high speed to obtain anisaldehyde emulsion; secondly, preparing anisaldehyde microcapsules: drying the anisaldehyde emulsion, collecting the anisaldehyde microcapsules, and storing the anisaldehyde microcapsules in a refrigerator for later use; preparing an anisaldehyde microcapsule / polyvinyl alcohol composite film: weighing polyvinyl alcohol, slowly adding distilled water, and heating while stirring; adding glycerol into the polyvinyl alcohol solution, and stirring; the anisaldehyde microcapsules are added into a polyvinyl alcohol solution, the solution is subjected to curtain coating to form a film after high-speed homogenization, and the film is dried at room temperature.

The utility model relates to the technical field of coating equipment, and in particular to a self-adhesive label curtain coating process equipment. It mainly aims at the problem that when the temperature decreases, the viscosity of the adhesive will increase and become more dense, which may lead to uneven coating and reduced coating efficiency, and proposes the following technical scheme: including a coating station, and also including a coating box arranged above the coating station, a coating block is installed at the bottom of the coating box, and a discharge channel is opened in the coating block; a heating mechanism for heating the adhesive in the coating box, and an adjustment component for adjusting according to the different viscosities of the adhesive at different temperatures. The utility model can heat the adhesive to keep it in an ideal viscosity and fluidity, so that the coating is uniform and the coating efficiency is improved.

The invention belongs to the technical field of high polymer materials and textile clothing, and particularly relates to an anti-sublimation hot melt film as well as a preparation method and application thereof. The preparation method of the anti-sublimation hot melt film comprises the following steps: adding polyol, polyisocyanate, a micromolecular chain extender, an auxiliary agent and a catalyst into a twin-screw extruder according to a weight ratio, carrying out a polymerization reaction, and then carrying out underwater pelletizing and curing to obtain polyurethane plastic particles for an anti-sublimation layer material; and carrying out curtain coating to prepare a single-layer film or a multi-layer structure composite film used as a middle layer, so as to obtain the anti-sublimation hot melt film. The prepared anti-sublimation hot melt film has high-grade anti-sublimation performance, migration and sublimation of pigment molecules can be effectively blocked, the film is soft in hand feeling, and good washing and dry cleaning resistance is achieved. The anti-sublimation hot-melt film prepared by the invention can be used as a decorative film, a transfer film and a hot-melt adhesive film, and is applied to the textile fields of trademarks, fabrics, clothes and the like.

The invention belongs to the technical field of polymer film materials. The invention relates to a PET film, in particular to a high-toughness PET film and a preparation method thereof. The preparation method comprises the following specific preparation steps: dissolving polyethylene glycol terephthalate resin with a solvent to obtain a PET solution with the mass fraction of 10-20%; adding nano boehmite, ethyl acetate and acetone into the PET solution, and uniformly dispersing to obtain a film forming solution; after the film forming liquid is subjected to curtain coating and blade coating forming, drying and hot press forming are conducted, and the high-toughness PET film is obtained; wherein the dosage of the nano boehmite is 10-15% of the mass of the polyethylene glycol terephthalate resin; the dosage of the ethyl acetate is 40-50% of the mass of the nano boehmite; the use amount of the acetone is 30-40% of the mass of the nano boehmite; the particle size distribution range of the nano boehmite is 2 to 150 nm, and D50 is 80 to 85 nm.