131 results about "Gel free" patented technology

The invention is suitable for the technical field of materials, and provides a binderless fiberboard and a preparation method thereof.The preparation method comprises the steps that wood fibers are subjected to oxidation treatment, and an intermediate is obtained; placing the intermediate in a metal ion solution for non-covalent bond coordination treatment, extruding the solution, and adding polyphenol into the fiber for chelation to obtain a chelated fiber; and assembling the chelate fibers into a plate blank, and carrying out hot pressing treatment to obtain the product. Metal ions and lignin hydroxyl are bonded and coordinated through an activation method, then the metal ions and polyphenol are chelated to form self-adhesion, meanwhile, the non-adhesive fiberboard formed by tightly interweaving and stacking the fibers can reach the national standard in mechanical strength and water absorption expansion rate, the preparation method is simple and easy to implement, raw materials are easy to obtain, and the production cost is low. The method is suitable for mass production; by means of the formed double-network structure, the binderless fiberboard is more compact, higher in stability and excellent in internal bonding strength, bending strength and other mechanical properties. Zero formaldehyde release of the fiberboard is achieved, and the cost is lower.

The invention relates to the technical field of BOPP (biaxially-oriented polypropylene) films, in particular to a scratch-resistant adhesive-free matt film and a preparation method thereof, and the scratch-resistant adhesive-free matt film comprises a matt layer, a core layer and a thermal composite layer which are sequentially arranged, the matt layer comprises co-polypropylene, high-density polyethylene, 2.0-2.5 wt% of linear alkyl silicone (the weight-average molecular weight is 12-150 thousands, and the surface tension is 42-45 mN / m) taking maleic anhydride modified aziridine as a terminal group, and 2000-4000 ppm of spherical polymethyl methacrylate (the particle size D50 is 4.0-5.0 microns); the core layer comprises homo-polypropylene; and the thermal composite layer comprises an ethylene-vinyl acetate copolymer and 2000 to 4000 ppm of a spherical anti-blocking agent. According to the scratch-resistant adhesive-free matt film, through collaborative design of the components of the matt layer and the thermal composite layer, balance of scratch resistance, high surface tension (printing applicability) and winding and unwinding smoothness of the surface of the matt layer is achieved, and a solution for the scratch-resistant generality problem of the matt surface of the high-end BOPP matt film is provided.

The invention provides a preparation method of a glue-free repulping multi-layer high-barrier packaging material, which comprises the following steps: taking a first paper base and a second paper base, preparing a barrier coating, and adding a plasticizer into the barrier coating; coating the first surface of the first paper base with a barrier coating to form a first paper base barrier layer with a two-layer structure; the second surface of the second paper base is coated with the mixture to form a second paper base barrier layer with a two-layer structure; the high-barrier packaging material is prepared by making one side of the barrier material face to face, overlapping and hot-pressing, further, the plasticizer is a bio-based plasticizer, the formed high-barrier packaging material is of a two-layer split structure through design, the surfaces of the two split layers are both coated with the barrier material, and the high-barrier packaging material is obtained. The same barrier material is plasticized and combined by using a hot pressing process, so that a synergistic and associated effect from addition and use of an environment-friendly material to a processing process is formed, the interlayer binding force of the material is effectively improved, the problems of swelling and cracking of the material are prevented, and the comprehensive properties such as moisture, oxygen and re-pulping are improved.

The invention relates to the field of hygienic products, and discloses a macroporous super-breathable, dry and comfortable hygienic product and a preparation process thereof, and the macroporous super-breathable, dry and comfortable hygienic product comprises a macroporous non-gel composite non-woven fabric, a nano platinum antibacterial layer, intelligent super absorbent resin and a softened surface layer. A macroporous structure is introduced into the surface of the non-woven fabric, so that the absorption speed of liquid and the air circulation are obviously improved; the nano platinum antibacterial layer endows the product with efficient antibacterial performance, effectively inhibits the growth of bacteria, and improves the hygienic guarantee of a user; the intelligent SAP automatically adjusts the water absorption capacity according to the environment humidity, rapidly expands under the high-humidity condition, improves the water absorption efficiency, locks the liquid and prevents the liquid from permeating back; the surface layer subjected to softening treatment further improves the comfort and the skin-friendly property of the product, and skin friction is reduced. The product is suitable for baby diapers, female sanitary napkins and adult incontinence nursing products, excellent air permeability, dry and comfortable performance and antibacterial performance are provided, and the comfortable experience of a user is remarkably improved.

The invention relates to the technical field of material forming, in particular to an adhesive-free compound forming method which comprises the following specific steps: S1, mold cleaning; s2, cutting is carried out; s3, laying a rubber layer and an adhesive layer: sequentially laying the adhesive layer and the rubber layer on the surface of the plastic film; s4, checking a rubber layer and a rubber layer; s5, preforming by a pressing machine; s6, curing pretreatment is carried out; s7, curing and forming; and S8, demolding is conducted. According to the elastic rubber supporting pad, emission of volatile organic compounds is reduced without using a traditional adhesive, the requirement of modern green manufacturing is met, meanwhile, the adhesive layer is adopted to replace the adhesive for coating, the adhesive performance of the elastic rubber supporting pad is improved, the production process is simplified, and the labor cost and the time cost are reduced.

The invention relates to a preparation method of a glue-free corn straw board, which comprises the following steps: crushing and screening corn straws to obtain corn straw powder meeting a preset fiber length as a raw material for preparing the glue-free corn straw board, carrying out high-temperature and high-pressure treatment on the raw material under a preset condition, and demolding to complete the preparation of the glue-free corn straw board. The method provided by the invention adopts a pure physical preparation method, only needs to crush the corn straw, and utilizes temperature and pressure conditions to enhance hydrogen bond grid formation and internal bonding effect in corn straw cellulose, hemicellulose and lignin, is simple and strong in operability, does not need any chemical agent, and is suitable for industrial production. Formaldehyde and organic volatile matters cannot be released into air, environmental pollution and damage to human health cannot be caused, and large-scale production and application of the glue-free corn straw board are facilitated.

The invention provides a non-glue glued fiberboard based on fiber pretreatment and a preparation method thereof, and the preparation method comprises the following steps: immersing wood fibers in a NaOH solution with the concentration of 0.8-1.5%, and defibering at 85-95 DEG C for 2-4 hours; immersing the defibered fibers in a NaOH / urea / aqueous solution with a mass ratio of (5-9): 12: (79-83), dissolving the fibers at-5 to-18 DEG C for 4-8 hours, and adding low-concentration acid at room temperature for regeneration; washing the regenerated fiber with water until the pH value is neutral, filtering, and drying at 50-70 DEG C until the water content is 8-15% to obtain pretreated fiber; the pretreated fibers are scattered, laid and then subjected to hot press molding, the temperature ranges from 180 DEG C to 200 DEG C, and the pressure ranges from 5 MPa to 9 MPa. Wherein the material-liquid ratio in the defibering and dissolving steps is 1g: (50-100) mL. Therefore, the high-performance glue-free glued fiberboard is obtained.

The present application relates to the technical field of BOPP film, in particular to a scratch-resistant glue-free matt film and a preparation method thereof, the scratch-resistant glue-free matt film comprises a matt layer, a core layer and a thermal composite layer arranged in sequence, the matt layer comprises copolymerized polypropylene, high-density polyethylene, 2.0-2.5 wt% maleic anhydride modified aziridine as an end group of linear alkyl silicone (weight average molecular weight 120-150 thousand, surface tension 42-45 mN / m) and 2000-4000 ppm spherical polymethyl methacrylate (particle size D50 is 4.0-5.0 microns); the core layer comprises homopolymerized polypropylene; and the thermal composite layer comprises ethylene-vinyl acetate copolymer and 2000-4000 ppm spherical anti-blocking agent. Through the synergistic design of the components of the matt layer and the thermal composite layer, the scratch-resistant glue-free matt film realizes the balance of the surface scratch resistance of the matt layer, the high surface tension (printability) and the smoothness of the winding and unwinding, and provides a solution to the common problem of the scratch resistance of the matt surface for high-end BOPP matt film.

The utility model relates to the technical field of oral corner protection patches, and discloses a disposable oral corner protection patch special for dental operation, which comprises an oral interior part and an oral exterior part arranged on one side of the oral interior part, and J-shaped aluminum sheets are arranged in the oral interior part and the oral exterior part. According to the disposable oral corner protection patch special for dental operation, the J-shaped aluminum sheet is completely wrapped by the medical silica gel, the effects of supporting the appearance of the medical silica gel and adjusting the thicknesses of different oral corners are achieved, the whole patch is made of the medical silica gel, the aluminum sheet is wrapped on the inner side of the patch, the high rebound resilience of the medical silica gel plays a role in buffering the oral corners, and the side face of the patch is in a half-moon arc shape. The medical polyurethane adhesive is attached to the inner side of the oral outer portion, the inner side of the oral inner portion is free of adhesive and smooth, the medical polyurethane adhesive is attached to the inner wall of the oral cavity through opening and closing of the J-shaped aluminum sheet, the outer side surfaces of the oral outer portion and the oral inner portion are rough, and slipping of instruments during operation of a doctor is prevented; the rough surface can prevent the saliva suction tube from slipping and falling off.

The utility model discloses a blanking device of a paper-plastic glue-free film laminating machine, which relates to the technical field of paper-plastic glue-free film laminating machines and comprises a paper-plastic glue-free film laminating machine body. The clamping assembly is used for fixedly clamping the film-coated material; the lifting assembly is used for driving the clamping assembly to move up and down; the transverse moving assembly is used for driving the clamping assembly to move transversely; the collecting assembly is used for collecting the material subjected to film covering; the clamping assembly comprises clamping plates and a lifting plate, the two clamping plates are symmetrically arranged, the top ends of the clamping plates are fixedly connected with connecting rods, and rubber pads are arranged on one sides of the clamping plates. The supporting assembly and the collecting assembly are arranged on one side of the paper-plastic glue-free film laminating machine body, and the transverse moving assembly, the lifting assembly and the clamping assembly are arranged on the inner side of the paper-plastic glue-free film laminating machine body, so that film-laminated materials can be effectively discharged, the discharging efficiency is effectively improved, discharging is convenient and rapid, and the labor amount of workers is reduced.

The invention belongs to the field of air filtering materials, and provides a non-gel activated carbon air filtering non-woven fabric. The design that the activated carbon particles are coated with polydopamine in situ and covalently connected with the nylon 6 fibers through Schiff base bonds and Michael addition bonds is adopted, and firm loading of the activated carbon particles in the non-woven fabric can be achieved without adding an independent binder; the problem that the adsorption efficiency is reduced due to the fact that a traditional binder blocks activated carbon micropores is solved. The thickness of the polydopamine coating layer is controllable, the loading capacity of the activated carbon can reach 5-40 wt%, low filtering resistance and high adsorption efficiency are still kept under the high-loading condition, the spunlace reinforcing technology ensures the particle distribution uniformity and batch stability, the tensile strength is not lower than 5 N / 5 cm, and the air purification application value is wide.

The invention discloses a wafer-level ultra-flat clean graphene electron microscope grid and a preparation method and application thereof. The method comprises the following steps: placing a target transmission electron microscope grid on the surface of a two-dimensional material on a hard growth substrate; a substance capable of generating molecular self-assembly is dissolved in a low-surface-tension organic solvent to prepare a fitting solution, the fitting solution is dropwise added to the surface of the structure, and tight fitting at the normal temperature is achieved after the solution is volatilized; etching to remove the hard growth substrate; and finally, washing with deionized water and isopropanol. According to the method disclosed by the invention, by utilizing the self-assembly effect of molecules and the characteristic of a low-surface-tension solvent, glue-free and normal-temperature transfer is realized, polymer residues are avoided, and the ultra-flatness and high cleanliness of the graphene surface are ensured; the method has the advantages of high universality, simple process and high yield, and is particularly suitable for batch production of 4-inch wafers.

The invention relates to the technical field of hygienic products, in particular to an air-laid glue-free core body for solidifying fluff pulp and SAP (Super Absorbent Polymer) by using superfine melt-blown fibers. The preparation method comprises the following steps: forming fluff pulp fibers into a base material layer through air laying; applying the modified SAP material to the substrate layer; the polymer melt forms melt-blown fibers through a melt-blowing process, and the melt-blown fibers directly deposit and penetrate into the SAP-containing base material layer when the melt-blown fibers have thermal viscosity to form a three-dimensional intertwining structure; and finally, carrying out hot pressing treatment on the structure, and realizing integral solidification under the condition of no additional adhesive by utilizing the thermal viscosity of the melt-blown fibers. The modified SAP material is obtained through pretreatment of an epoxy compound and coating treatment of mixed slurry of nanocrystalline cellulose and a functional additive. The problems that SAP particles in a traditional core body are prone to migration, powder falling and gel blocking are effectively solved through the glue-free solidification technology, and the obtained core body is high in absorption speed, low in back seepage amount, stable in structure and suitable for sanitary products such as paper diapers and sanitary napkins.

The application provides a glue-free flexible copper-clad plate and a preparation method thereof. The glue-free flexible copper-clad plate comprises a conductive layer, a first film layer and a second film layer which are stacked in sequence. One side surface of the conductive layer is provided with first protrusions, one side surface of the first film layer is provided with second protrusions, and the side of the conductive layer provided with the first protrusions is completely attached to the side of the first film layer provided with the second protrusions. The material of the first film layer is thermoplastic material, and the material of the second film layer is thermosetting material. The glue-free flexible copper-clad plate has good heat resistance, high dimensional stability, small thickness, high bending resistance and strong bonding force between the conductive layer and the first film layer.

The invention belongs to the technical field of liquid cooling plates, provides a shielding method of a powder spraying liquid cooling plate, and solves the technical problems of convenience of continuous shielding and rapid shielding removal of the liquid cooling plate. The method comprises the following specific steps: (1) customizing spacing gummed paper; (2) overlapping and positioning the edge of the non-adhesive area of the interval adhesive paper and the edge of the powder spraying liquid cooling plate; and (3) shielding the to-be-sprayed surface of the powder spraying liquid cooling plate after positioning, and wrapping the back surface of the to-be-sprayed surface with redundant gummed paper to complete shielding. Aiming at the requirement that the periphery of the powder spraying liquid cooling plate needs to be shielded on the front and back surfaces and the side surfaces, shielding can be quickly carried out, the adhesive width on the two sides of the adhesive tape is the same as the shielding width, the middle non-adhesive area is reserved, and the product edge is used as a reference line to be aligned with the adhesive inner edge of the adhesive paper for positioning during shielding, so that the shielding tolerance is ensured. And meanwhile, shielding removal after powder spraying and baking is also friendly, so that the working hours of front and back surface shielding, side surface shielding and shielding removal are greatly saved, and the labor cost is saved.

The application relates to a synthesis method and application of a heat-adhesive polyimide and polyimide film, and steps are as follows: a plurality of portions of diamine monomers and a plurality of portions of dianhydride monomers are prepared into a polyimide acid solution, then a glue film is prepared, and a heat-adhesive polyimide film is obtained after complete imidization at high temperature. The application proposes a novel heat-adhesive polyimide film containing N and S atom coordination elements, which has a low thermal expansion coefficient, high heat adhesion, high heat resistance and high tensile strength, and can be applied to the production of glue-free double-sided flexible copper-clad plates (2L-FCCL) by a laminating method. Compared with existing commercial polyimide films, the heat-adhesive polyimide film in the application can be strongly attached to copper foil in a heat processing process without an additional epoxy resin or acrylic adhesive, and thus is suitable for the rapid production of 2L-FCCL by a hot pressing method, the peel strength of the heat-adhesive polyimide film reaches above 0.6 N / mm, and the highest peel strength reaches 1.2 N / mm, and the heat-adhesive polyimide film has a good application prospect in the field of glue-free flexible copper-clad plates.

The invention discloses a glue-free PET (Polyethylene Terephthalate) composite PVC (Polyvinyl Chloride) film and a preparation method thereof. The glue-free PET composite PVC film is prepared from the following components in parts by mass: 100 parts of PVC resin, 16 to 50 parts of plasticizer, 2 to 8 parts of stabilizer, 0.5 to 2 parts of processing aid, 0.5 to 2 parts of anti-ultraviolet agent and 2 to 10 parts of anti-impact modifier. According to the adhesive-free PET composite PVC film and the preparation method thereof provided by the invention, the polyester plasticizer with high molecular weight is adopted, and the anti-ultraviolet agent is compounded and added, so that the weather resistance and the ultraviolet resistance of the PVC film can be improved; and the acrylate impact modifier is adopted, so that the processability of the product and the toughness of the finished product can be improved. The PET is directly compounded in the PVC calendering production process, so that the double-sided highlight effect of the PVC film is realized, the transparency of the product is high, and the extinction problem in the industry is solved.

The utility model belongs to the technical field of packaging boxes, and particularly relates to a glue-free dessert portable box structure which comprises a bottom plate, and four edges of the bottom plate are respectively connected with a left side plate, a right side plate, a front side plate and a rear side plate. The left side plate and the right side plate are in mirror symmetry in structure and each comprise a first rocking wing, a first rocking cover and a handle which are sequentially connected through creases. The structures of the front side plate and the rear side plate are in mirror symmetry, and each of the front side plate and the rear side plate comprises a second rocking wing and a second rocking cover which are connected through creases; first inserting tongues are arranged on the two sides of the first rocking wing respectively, inserting seams matched with the first inserting tongues in a clamped mode are formed in the second rocking wing, second inserting tongues are arranged on the lifting handle, inserting holes matched with the second inserting tongues in a clamped mode are formed in the second rocking cover, and hollow holes are formed in the lifting handle. According to the scheme, glue-free design is adopted, so that the portable box is more environment-friendly, and food in the portable box is not easy to pollute. And moreover, the integral structure adopts an integral design, so that the folding is convenient, and the bearing capacity of the integral structure is greatly improved.

The application discloses a glue-free adhering heterogeneous material and a preparation method thereof. The glue-free adhering heterogeneous material comprises a first heterogeneous material, a second heterogeneous material and a binding material, and various materials are connected through glue-free adhering. The preparation method comprises the following steps: conveying and extruding the first heterogeneous material, the second heterogeneous material and the first surface and the second surface of the binding material through a pressing equipment, so that the first heterogeneous material, the binding material and the second heterogeneous material are combined, and the first heterogeneous material, the binding material and the second heterogeneous material are connected and adhered through the foaming force generated by foaming physical and / or chemical reaction. The glue-free adhering technology is adopted, so that the environmental protection problem is solved, and the application approach of the product is improved.

The invention discloses a lace film and a production process thereof, and belongs to the technical field of film preparation, the film is composed of a bionic skin feeling functional layer, a gradient foaming layer and an enhanced substrate layer which are compounded in sequence, and the surface of the film is provided with a laser-engraved bionic lace line micropore array. The bionic skin feeling functional layer contains castor oil-based TPU (Thermoplastic Polyurethane), organic silicon microspheres and plant polypeptide; the cell density of the gradient foaming layer is gradually increased from outside to inside, and the gradient foaming layer contains a nano photocatalyst; and the reinforced substrate layer is polyester fiber fish scale cloth treated by nitrogen / helium plasma. The preparation method comprises the steps of material banburying, supercritical CO2 injection and gradient foaming, fish scale cloth plasma treatment, hot-pressing compounding, femtosecond laser engraving and constant-tension rolling. A bio-based material is used for replacing traditional PVC, the problems of environmental protection risk, high energy consumption and cleaning of a plasticizer are solved through low-temperature foaming, glue-free compounding and precise carving, the product has degradability, leather-like touch feeling and a self-cleaning function, and the performance and environmental protection performance are remarkably improved.

The invention discloses a two-phase flow vacuum sealing structure, a preparation method and application in the field of two-phase flow heat dissipation and high airtight packaging, and the two-phase flow vacuum sealing structure comprises two base material layers and a sealing structure layer arranged at the peripheral edge part between the base material layers, a capillary structure layer is arranged in the center of the sealing structure layer and located between the two base material layers, and a blocking layer is arranged between the capillary structure layer and the sealing structure layer. By providing two sealing structure selections of an edge sealing adhesive type and a weldable base material type, a proper sealing mode can be flexibly selected according to different application scenes and material characteristics, and the process adaptability is remarkably improved. An effective sealing solution can be provided for production scenes needing rapid curing and convenient operation and products sensitive to sealants and requiring no-sealant sealing.

The invention relates to the technical field of packaging materials, and discloses a high-barrier long-acting antibacterial composite environment-friendly packaging material and a preparation method thereof, and the high-barrier long-acting antibacterial composite environment-friendly packaging material is formed by compounding an inner-layer film, a middle-layer film and a surface-layer film. The inner-layer film is prepared from low-density polyethylene, metallocene linear low-density polyethylene and the like; the middle-layer film is a reactive compatibilization layer and comprises an ethylene-vinyl alcohol copolymer, polybutylene terephthalate adipate and a styrene glycidyl methacrylate copolymer, and compatibility and toughness are improved through an in-situ reaction; a surface film is a functional layer, phytic acid and bifunctional modified montmorillonite are utilized to construct a hybrid network, and the sedum sarmentosum extract and the chitosan quaternary ammonium salt are anchored. By adopting a step-by-step film preparation and hot-pressing compounding process, the obtained material has the characteristics of high barrier, high strength and long-acting bacteriostasis, and the glue-free compounding process is environment-friendly and safe.

The utility model discloses a rubber-free spring mattress, which belongs to the technical field of mattresses and comprises an elastic layer and a connecting layer, the elastic layer comprises buffer springs and linen, the buffer springs are arranged in the linen in an array manner, the connecting layer is positioned above the elastic layer, mounting grooves are uniformly formed in the upper end of the periphery of the connecting layer, and the mounting grooves are communicated with the connecting layer. Connecting holes are formed in the two sides of the lower end of the interior of the mounting groove and are through holes, connecting hooks are mounted on the periphery of the connecting layer and penetrate through the linen to be clamped to one side of the buffer spring, limiting protrusions are evenly arranged at the lower end of the connecting layer, and a comfortable layer is fixedly mounted at the upper end of the connecting layer; the connecting piece can be installed on the elastic layer through the connecting hook piece, so that use of glue is reduced, the situation that formaldehyde is generated by the glue and influences health of a user is avoided, meanwhile, movement of the connecting layer can be reduced through the limiting protrusions, and the connecting layer and the comfortable layer can be detached through connection of the connecting hook piece; and a user can conveniently clean and overhaul the elastic layer.

The invention relates to a rod-shaped multi-segment article (32) and to a method and a machine (2) for producing such a multi-segment article (32). The article has at least two rod-shaped segments (34), preferably three, four, five or more rod-shaped segments, which are arranged adjacently to one another and the exterior (36) of which is surrounded by a covering material (38) at least in some areas. The covering material (38) has at least one continuous glue-free region (50) which at least partly surrounds the mutually facing segment edges (52) of the adjacent segments (34) and preferably connects the segments (34) to one another.

This invention provides a method for producing glue-free and formaldehyde-free particleboard, belonging to the field of particleboard technology. This invention uses bamboo willow branches, *Ligustrum lucidum* branches, dried leaves, and *Eucommia ulmoides* waste as raw materials after chipping. No adhesives are needed. Through practice, it has been found that *Ligustrum lucidum*, also known as "sheep's milk strip," contains rubber components in its stems and leaves. Sulfur water-dispersible granules, originally used for antibacterial and insecticidal purposes, undergo a vulcanization cross-linking reaction with the rubber components in the *Ligustrum lucidum* branches and dried leaves during continuous hot pressing of the layered particleboard blanks. Furthermore, some rubber components remain in the *Eucommia ulmoides* waste. This vulcanization cross-linking reaction creates a tightly connected cross-linked network between the raw materials, acting as an adhesive for the particleboard. This method not only reduces energy consumption but also facilitates processing, reduces production costs, and provides excellent performance, completely eliminating pollution sources at a low cost.

The present invention discloses an airbag massage comb, which includes a comb back, an airbag cover, comb teeth and an elastic member. The comb teeth are installed on the airbag cover. The front surface of the comb back has a pressing edge formed by bending inward. The airbag cover is installed on the front surface of the comb back and arches upward to form an airbag cavity with the comb back. The elastic member is located in the airbag cavity and has an elastic force to press the edge of the airbag cover against the bottom of the pressing edge. In the present invention, the airbag cover of the comb is connected to the comb back in a glue-free and detachable manner, which can ensure that the processing environment of the comb is not polluted by glue, avoid the harm of glue to the operators, and prevent the hardening and cracking phenomena caused by the contact between the airbag cover and the glue, improve the service life of the airbag cover, and is conducive to the disassembly of the airbag cover, facilitating the later replacement and maintenance.

The utility model relates to wet tissue packing technical field discloses a wet tissue cover and wet tissue packing, the upper cover of wet tissue cover is provided with the annular buckle of the lateral clamping of outer cover, the center is provided with the silica gel sealing plug of corresponding cooperation with the extraction mouth, the outer cover and inner cover center are provided with the extraction mouth, and the outer cover and inner cover are connected through the convex platform and the groove structure of mutual embedding and are buckled, the convex platform and the groove structure of mutual embedding include the first convex platform and the second convex platform of setting at the bottom surface of outer cover / the top surface of inner cover, the top surface of inner cover / the bottom surface of outer cover is provided with the first groove and the second groove of mutually corresponding embedding with the first convex platform and the second convex platform, the bag body of wet tissue packing is pressed and arranged in the first groove and / or the second groove with the first convex platform and / or the second convex platform, realizes reliable connection between bag body and wet tissue cover, realizes sealing, prevents the bag body from loosening, discards traditional glue sticking and label sealing mode, realizes glueless sealing and installation, is favorable for long -term stable sealing, has the characteristics such as simple structure, strong practicality, good use effect.

The invention belongs to the technical field of circuit board manufacturing, particularly relates to a manufacturing method of a glue-free micro-section, and provides the following scheme aiming at the problems that an existing traditional micro-section glue pouring method is tedious in process and high in cost, and observation position deviation, in-hole glue interference, uneven observation surface and the like are easily caused. Comprising the following steps: S1, selecting a proper position on a circuit board, marking the position of a micro-section to be manufactured, and then cutting and sampling the marked position to obtain a micro-section sample; s2, the cut micro-section sample is subjected to surface treatment, it is ensured that the micro-section sample is regular in shape and clean in surface, and the area to be observed is obvious, and according to the manufacturing method of the non-glue micro-section, the manufacturing time and cost are remarkably reduced, and the tedious process of traditional glue pouring is abandoned; the micro-slice is fixed by adopting the transparent acrylic plate and the silica gel sheet, and an efficient and stable fixing effect is realized by combining with the adjustable clamp; in addition, the glue-free design prevents interference of foreign matters in the hole, and accuracy and reliability of observation are improved.

The invention relates to the technical field of composite materials, in particular to a production method of a glue-free bamboo fiberboard, which comprises a process of carrying out bio-enzyme pretreatment on bamboo fibers, and the process of bio-enzyme pretreatment comprises the following steps: step 1, mixing the bamboo fibers and a buffer solution with the pH value of 4.0-4.5 and the temperature of 45-50 DEG C in a container, putting a first magnetizing enzyme into the container, treating for 1.0-1.5 hours, and recovering the first magnetizing enzyme in a magnetic adsorption manner after the treatment in the step 1 is finished; step 2, putting a second magnetizing enzyme into the container, treating for 1.5-2.0 hours, and recovering the second magnetizing enzyme in a magnetic adsorption manner after the treatment in the step 2 is finished; step 3, reducing the temperature of the buffer solution to 30-35 DEG C, then putting a third magnetizing enzyme into the container, treating for 1.0-1.5 hours, and recovering the third magnetizing enzyme in a magnetic adsorption manner after the treatment in the step 3 is finished; and 4, the pretreated bamboo fibers are taken out, cleaned and dried.

The manufacturing process comprises the following steps: providing a first PET (Polyethylene Terephthalate) layer, a second PET layer and an active carbon resin layer between the first PET layer and the second PET layer; sequentially puncturing the three layers by adopting a special needle with barbs; the first silk thread is hooked out of the first PET layer through needle movement, and the second silk thread is hooked out of the second PET layer; the two silk threads are entangled in the activated carbon resin layer; and glue-free connection is formed through multi-point repetition. The process does not need an adhesive, is environment-friendly and efficient, is firm in fiber bridging, and is suitable for an air purification material.