4433 results about "Hot melt" patented technology

An absorbent article comprising a hotmelt adhesive comprising a styrene-block-copolymer (SBC), an amorphous polyolefin and optionally a tackifier. The SBC is preferably selected from the group of SEBS, SEPS and SEP polymers, and the amorphous polyolefin is preferably a propylene-based copolymer (PbP) having a weight-average molecular weight Mw of less than 10 000 g / mol. The hotmelt adhesive bonds two components of the article, for example SAP particles on the core wrap.

The invention discloses a frozen soil roadbed hot melt settlement laser scanning measurement method and system, and relates to the technical field of measurement, the method comprises the following steps: obtaining gridding surface data, and obtaining an elevation data sequence of each grid point; acquiring an elevation change index of each grid point according to the elevation data sequence of each grid point; acquiring a plurality of grid points adjacent to the ith grid point and taking the plurality of grid points as a plurality of reference grid points of the ith grid point, acquiring each relative difference quantity of the ith grid point, and acquiring a correction proportion of the ith grid point according to the plurality of relative difference quantities of the ith grid point; and obtaining target elevation data of each grid point according to the correction proportion of each grid point and the measured elevation data at the current moment, and forming a measurement result including the gridding surface data according to the target elevation data of each grid point. The method has the advantages of identifying abnormal values, dynamically correcting measurement and improving data reliability.

The invention belongs to the field of functional textile materials, and provides a directional moisture-conducting, dry, comfortable, breathable and quick-dry fabric and a preparation method thereof. A three-layer composite structure design is adopted, the outer layer is a gradient wetting structure formed by attaching a thermoplastic polyurethane film subjected to single-face thermal orientation treatment and knitted fabric, the middle layer is a hydrophilic non-woven fabric, the inner layer is a knitted fabric subjected to hydrophilic finishing, and the two layers are compounded through a hot melt adhesive dot-shaped net. Hydrophilic blocks of the thermoplastic polyurethane film are directionally enriched through single-face contact heating, gradient distribution with one hydrophilic side and one hydrophobic side is formed, and the hydrophobic surface is coated with a low-surface-energy coating. The fabric has excellent one-way moisture conduction performance, moisture can be rapidly transmitted from the inner layer to the outer layer and rapidly volatilized, dryness and comfort of the close-fitting fabric are kept, meanwhile, the fabric has good air permeability and quick-drying performance, the moisture conduction rate is increased by 30% or above compared with that of traditional fabric, and the fabric is suitable for being popularized and applied. The fabric has wide application value in the fields of sportswear, outdoor equipment, leakage-proof underpants and the like.

The invention discloses a PE pipeline hot melting fixing device and method, and particularly relates to the technical field of pipeline construction.The device comprises a fixed frame, a movable frame and a heater, the fixed frame and the movable frame are each provided with a fixing clamp used for fixing a PE pipe, and the heating faces of the two sides of the heater are each provided with a conical supporting and pressing assembly; the conical supporting and pressing assembly is used for extruding the edge of the inner wall of the port of the PE pipe when the port of the PE pipe is heated, so that a notch is formed in the edge of the inner wall of the port of the PE pipe, the hot melting fixing device further comprises an inner supporting cylinder, and the inner supporting cylinder is matched with the inner wall of the PE pipe. The conical supporting and pressing assembly is arranged, so that a notch is formed in the end opening of the PE pipe, the notch can be filled preferentially when follow-up pressing butt joint is carried out and inward extrusion deformation of materials is formed, forming of an inner flanging is avoided as much as possible, and then the problems of flow impact, vibration damage and the like caused by internal protrusions when follow-up pipelines are used are solved.

The invention provides a waterproof and windproof warm-keeping fabric and a production process thereof, and relates to the technical field of textile fabrics, the waterproof and windproof warm-keeping fabric comprises a protective surface layer, a windproof temperature-locking middle layer and a skin-friendly warm-keeping inner layer which are sequentially arranged from outside to inside, and the three layers are compounded through a gradient hot melt adhesive; the protective surface layer is a graphene oxide modified polyester fiber fabric treated by a composite hydrophobic finishing liquid; the windproof temperature-locking middle layer sequentially comprises a non-swelling environment-friendly TPU film, a polytetrafluoroethylene microporous film and a Cs0. 33WO3 modified PA6 / 66 hollow fiber net from outside to inside, and the three are laminated and compounded into an integrated structure through hot pressing; and the skin-friendly warm-keeping inner layer is a bamboo pulp fiber-cotton-skin-friendly antibacterial polyester fiber blended fabric loaded with phase change microcapsules. The fabric disclosed by the invention integrates excellent waterproof, windproof and warm-keeping properties, is suitable for outdoor and cold-proof clothes, and has both functions and comfort.

The invention relates to the technical field of production processes of plastic composite pipes, and particularly discloses a production process of a PVC-C ardealite industrial fluid steel-plastic composite pipe, which comprises the following steps: step 1, adopting resin as a raw material, and producing an inner plastic pipe by using a twin-screw extruder; 2, the outer surface of the inner plastic pipe is evenly coated with a hot melt adhesive layer through a hot melt adhesive extruder; 3, the steel takes a steel belt as a raw material, the inner plastic pipe is wrapped to produce the spiral steel pipe, and 4, heat is induced outside the spiral steel pipe to enable the hot melt adhesive layer to be secondarily melted to bond the spiral steel pipe and the inner plastic pipe; and 5, after high-frequency heating of the spiral steel pipe, the outer surface of the steel pipe is rapidly coated with an outer rubber layer and an outer plastic layer made of PVC-C materials, and a finished pipe is obtained after cooling. The technical problems that in the prior art, when a PVC-C steel-plastic composite pipe is produced, an inner pipe and a steel pipe are coated with hot melt adhesive to be combined into a whole in a sleeved mode after being produced respectively, the steel pipe and the inner pipe are connected only through the hot melt adhesive, the bonding strength is limited, and steel-plastic separation exists are solved.

Hot melt adhesive including a polar group-containing olefin copolymer has: number average molecular weight (Mn) between 10 to 50 kg / mol, crystallinity (Xc) content below 30%, enthalpy (ΔH) between 5 to 65 J / g, polydispersity index (PDI) from 2 to 6, melting temperature (Tm) between 40 and 120° C., and including at least 80 mol % of a constituent unit of formula (1), optionally a constituent unit of formula (2), and between 0.1 to 1 mol %, of a constituent unit of formula (3):wherein R1 is H or CH3; R2 is a hydrocarbyl group having 0 to 10 carbon atoms; R3 is a hydrocarbyl group having 2 to 10 carbon atoms, when X is hydroxyl functionality or a hydrocarbyl group having 0 to 10 carbon atoms, when X is polar organic group containing at least one carboxylic acid functionality and 0 to 6 carbon atoms.

The invention discloses a sealing performance testing device for a hot melt adhesive film, and relates to the technical field of hot melt adhesive film testing. Which comprises a box body and is characterized in that the bottom of the box body is fixedly connected with a base, the middle of the top of the base is provided with a detection cavity, the top of the box body is provided with a PLC, the middle of the inner bottom wall of the box body is provided with a first electric cylinder, the output end of the first electric cylinder is fixedly connected with a connecting cover, and the middle of the bottom of the connecting cover is fixedly provided with a connecting column; a fixing table is fixed to the bottom of the connecting cover through connecting columns, and an air inlet cover is arranged at the bottom of the fixing table. By arranging the rotating expansion assembly, the fixing table and the sliding groove, hot melt adhesive films of different shapes are laid at the top of the flattening plate at will, the hot melt adhesive films are rapidly rotated and unfolded through multiple stress points, the hot melt adhesive films can be rapidly unfolded, the situation that the detection effect is affected due to the fact that the hot melt adhesive films are wrinkled is avoided, and the detection efficiency is improved. And moreover, the hot melt adhesive film can be prevented from being damaged due to non-uniform tension in the process of unfolding the hot melt adhesive film.

The utility model discloses a water sticker printing device which comprises a printer body and transfer paper, and at least one surface of the transfer paper is provided with a water-soluble coating. The printer body is provided with a printing area for transfer paper to pass through and a printing trolley assembly which moves on the printer body and sequentially sprays a hot melting resin layer, a pattern layer, a curing gloss oil layer and a gold stamping gloss oil layer to the side face of a water-soluble coating of the transfer paper. A gold film laminating assembly used for stamping a gold film on the gold stamping gloss oil layer and a positioning film laminating assembly used for attaching a positioning film to transfer paper are sequentially arranged at the position, located at the output end of the printing area, of the printer body, and a positioning film heating assembly used for heating the positioning film laminating assembly is arranged on the positioning film laminating assembly. The gold film is pressed on the gold stamping gloss oil layer through the film covering assembly on the front side to achieve the pattern gold stamping effect, the pattern subjected to water transfer printing on a product is light and thin, the surface of the product can be kept smooth, a printing silk plate does not need to be manufactured, the pattern does not need to be fixedly arranged, and personalized setting printing can be conducted.

The invention discloses a nursing pad with a gradient absorption structure and a compounding process thereof, and relates to the field of nursing pads, the nursing pad comprises a flow guide surface layer, an absorption layer, a water locking support layer, a micro-channel layer and a PE film bottom layer which are sequentially compounded from top to bottom; the absorption layer comprises low-crosslinking SAP and fluff pulp, and the thickness of the absorption layer is 3-4 mm; the water-locking supporting layer comprises highly crosslinked SAP, PVA fibers and hot melt adhesive powder, and the thickness of the water-locking supporting layer is 2-3 mm; the density of the absorbing layer is 0.1-0.15 g / cm < 3 >, the density of the water locking supporting layer is 0.3-0.4 g / cm < 3 >, and the absorbing layer and the water locking supporting layer are used for forming a density gradient structure from the absorbing layer to the water locking supporting layer. A gradient density structure of a soft core and a hard shell is formed by constructing the rapid water absorption characteristic of low cross-linked SAP of the absorption layer and combining a rigid network of high cross-linked SAP of the water locking supporting layer and PVA fibers, the problem that the thickness of a traditional homogeneous structure is not uniform due to disordered accumulation of SAP is solved, and therefore the fitting performance of the nursing pad and the skin is further improved; and the pressure sore risk caused by local pressure concentration is reduced.

The invention belongs to the technical field of hot melt adhesives, and discloses a polyurethane hot melt adhesive as well as a preparation method and application thereof. The polyurethane hot melt adhesive is prepared from the following raw materials: polyester polyol, polyether polyol, fluorine-containing dihydric alcohol, isocyanate, a chain extender, a catalyst and a modified montmorillonite antibacterial filler, the preparation method of the modified montmorillonite antibacterial filler comprises the following steps: modifying montmorillonite through sulfur-containing amino acid, increasing the interlayer spacing of the montmorillonite through an intercalator, entering the interlayer spacing of the montmorillonite through a metal organic framework synthesized by imidazole or an imidazole derivative and zinc salt, and carrying out surface modification to obtain the modified montmorillonite antibacterial filler. A silver-ammonia solution is treated by a reducing agent, so that the nano-silver is loaded on the montmorillonite and in the surface, the skeleton and the pores of the MOFs material. The polyurethane hot melt adhesive disclosed by the invention not only has high peel strength, but also has excellent waterproofness and lasting antibacterial property.

The invention relates to a light / heat / magnetic detachable high-strength polyurethane adhesive as well as a preparation method and application thereof. The light / heat / magnetic detachable high-strength polyurethane adhesive comprises a polyurethane adhesive and a functional filler. According to the light / heat / magnetic detachable high-strength polyurethane adhesive prepared by the preparation method disclosed by the invention, the colloid is black, and the adhesive has excellent light absorption performance and can realize rapid separation of an adhesive interface under infrared irradiation through a heat effect; meanwhile, the ferroferric oxide can be vibrated and heated under the action of an external magnetic field due to the magnetic response characteristic of the ferroferric oxide, so that fracture and separation of the adhesive layer are promoted. By means of the technology, efficient and reversible disassembly of parts bonded through the hot melt adhesive is achieved, possibility is provided for recycling and reusing of bonding materials and devices, and the problem that traditional polyurethane hot melt adhesive cannot be recycled is solved.

The invention relates to the technical field of adhesives, in particular to a bio-based polyurethane hot melt adhesive and a preparation process thereof. The bio-based polyurethane hot melt adhesive is prepared from the following raw materials in parts by weight: 30 to 40 parts of bio-based polyester glycol, 60 to 80 parts of bio-based polyether polyol, 25 to 35 parts of acrylic resin, 40 to 60 parts of isophorone diisocyanate, 3 to 5 parts of bisphenol A epoxy resin E-44, 3 to 5 parts of 1, 3-butanediol, 1, 3-butanediol and 1, 3-butanediol. The coating is prepared from the following raw materials in parts by weight: 1-2 parts of 1, 4-butanediol, 0.2-0.6 part of dibutyltin dilaurate, 0.6-1.0 part of 3-aminopropyltriethoxysilane, 3-5 parts of modified carbon nanotubes, 2-4 parts of a curing agent, 1-1.5 parts of an ultraviolet absorbent and 0.8-1.2 parts of an antioxidant. The bio-based polyurethane hot melt adhesive prepared by the invention not only has better adhesive property, but also has excellent mechanical property and aging resistance, and the quality of the bio-based polyurethane hot melt adhesive is ensured while the service life of the bio-based polyurethane hot melt adhesive is effectively prolonged.

The invention provides an ultra-high molecular weight polyethylene fiber woven reinforced polyethylene / polyvinyl chloride composite pipe and a preparation method thereof. The composite pipe is of a five-layer composite structure and comprises a high-density polyethylene core pipe on the inner layer, an ultra-high molecular weight polyethylene fiber woven reinforcement layer on the middle layer, a polyvinyl chloride coated pipe on the outer layer, a first adhesive layer and moisture curing reaction type polyurethane hot melt adhesive on the second adhesive layer. The preparation method of the composite pipe comprises the steps of inner layer core pipe preparation, polyurethane hot melt adhesive coating, fiber woven reinforcement layer forming, secondary polyurethane hot melt adhesive coating, outer layer wrapping and the like. The fiber performance is protected by adopting a low-temperature process, and efficient bonding is realized; the ultra-high molecular weight polyethylene fibers are alternately woven and wound to form the grid reinforcing layer, so that the pipe is endowed with high strength and impact resistance. The problems that a traditional composite pipe is prone to layering between layers, insufficient in pressure bearing capacity, complex in construction connection and the like are solved, and the composite pipe has the advantages of being high in strength, resistant to corrosion, easy to connect and the like.

The invention provides a thermoplastic hot melt adhesive for bonding cover plates of household appliances and a preparation method of the thermoplastic hot melt adhesive. The thermoplastic hot melt adhesive for bonding cover plates of household appliances comprises the following components in parts by mass: 40-70 parts of a high-polarity thermoplastic elastomer; 5 to 10 parts of a copolymer containing amorphous alpha-olefin; 10 to 50 parts of tackifying resin with a high softening point; 0.5 to 2 parts of an antioxidant; 0.5 to 2 parts of a light stabilizer; 0.2 to 0.5 part of a silane coupling agent; wherein the high-polarity thermoplastic elastomer is at least one of TPU, EAA, TPEE, ACM and PA. The bonding performance is improved through the high-polarity thermoplastic elastomer; the copolymer containing the amorphous alpha-olefin promotes wetting and permeation on the surface of an adhered object, so that the adhesion is improved, and the toughness of the high-temperature-resistant hot melt adhesive is improved; physical cross-linking curing is carried out through temperature reduction, the curing process is not directly influenced by humidity, and the sealing requirement of sizing equipment for water vapor is reduced.

The invention discloses a tensile bending and thermal stress combined test device and method, and belongs to the technical field of material testing, the device comprises a support frame, and the support frame is provided with a mechanical tensile device and a three-point bending device; the mechanical stretching device comprises a first sliding base, a second sliding base, a two-way threaded rod, a first clamping assembly and a second clamping assembly, and the middle of the first sliding base and the middle of the second sliding base are connected with the two-way threaded rod through threaded structures. The top ends of the first sliding base and the second sliding base are fixedly connected with a first clamping assembly and a second clamping assembly respectively, a sample is fixed between the first clamping assembly and the second clamping assembly, and the tensile force of the sample is detected by rotating a bidirectional threaded rod; the three-point bending device is arranged at the top of the supporting frame, and the bending force of the sample is detected through downward pressing of the three-point bending device. According to the invention, a stretching-bending-thermal stress combined aging test is carried out on a hot melt adhesive bonding sample under a set condition, and the performance of a hot melt adhesive layer under a long-term operation condition is tested.

The invention relates to the technical field of composite pipe machining equipment, and provides a winding device and technology for large-diameter water supply pipe production, the winding device is used for winding a glass fiber belt on the outer wall of a pipe body, the winding device comprises a rack, a moving platform, a pressing wheel and a hot air pipe, the pipe body is rotationally arranged on the rack, the moving platform is movably arranged on the rack, and the hot air pipe is arranged on the rack. The moving platform is located on one side of the pipe body, the moving direction of the moving platform is parallel to the rotating axial direction of the pipe body, the pressing wheel is rotationally arranged on the moving platform and is opposite to the rotating direction of the pipe body, the glass fiber belt is coated with bonding materials, a gap is reserved between the pressing wheel and the pipe body so that the glass fiber belt can penetrate through, and the hot air pipe is arranged on the moving platform and is provided with an air outlet facing the gap. The air outlet is used for outputting hot air hot melting bonding materials to be matched with the pressing wheel to extrude the glass fiber belt to be bonded to the outer wall of the pipe body. According to the winding device, through the pressing wheel and the hot air pipe, stable bonding of the glass fiber belt is achieved, and the technical problem that in the prior art, bonding of glass fibers and a PE pipe body is difficult is solved.

The invention discloses a high-toughness high-temperature curing epoxy resin prepreg for automatic fiber placement and a preparation method of the high-toughness high-temperature curing epoxy resin prepreg, and belongs to the technical field of resin-based composite materials. The whole high-toughness high-temperature curing epoxy resin prepreg for automatic fiber placement is of a layer structure and is formed by sequentially compounding a high-viscosity surface layer adhesive film, a high-toughness high-temperature curing epoxy resin layer adhesive film and a reinforced fiber layer by adopting a hot melt adhesive film method. According to the high-toughness high-temperature cured epoxy resin prepreg, the toughness is greatly improved, the long storage period can be guaranteed, the viscidity maintaining time is long, the outstanding comprehensive performance is achieved, and the manufacturability use requirement of automatic fiber placement prepreg can be met.

The invention relates to the technical field of PE warning board film covering, in particular to efficient film covering equipment for a PE warning protection board. Comprising a machine frame and a hot-pressing laminating chamber, a hot melting coating mechanism and a curved surface thermal shrinkage laminating mechanism are arranged in the hot-pressing laminating chamber, the hot melting coating mechanism comprises a heating roller and a first supporting roller, a three-layer phase change energy storage nested structure is arranged in the heating roller, and the curved surface thermal shrinkage laminating mechanism comprises a composite elastic roller and an elastic supporting roller. Distributed temperature sensors are arranged in the heating roller and the composite elastic roller, micro-airbag array layers are arranged on the roller surfaces of the composite elastic roller and the elastic supporting roller, pressure detection systems are arranged in the micro-airbag array layers, a cooling mechanism is further arranged behind the hot-pressing film laminating chamber, and the cooling mechanism comprises a cooling roller and two limiting guide rollers which are located on the two sides of the cooling roller and used for guiding. The coating device can adapt to coating operation of the curved-surface PE warning board, it is guaranteed that the surface of the warning board is evenly coated with a hot melt adhesive film, the fitting quality of a complex curved surface is improved, and the energy utilization efficiency is improved while the melting quality of the adhesive film is guaranteed.

The invention discloses an Antarctic ice layer gas and microorganism detection method based on hot-melt drilling digital twinning, and belongs to the technical field of digital technologies and polar scientific investigation engineering. Parameters are collected in real time through various sensors integrated in a hot-melt drill bit and are transmitted to a far-end console through electromagnetic waves; and a complete information flow is presented after the processing of an anomaly checking algorithm and an AI decision early warning system. The system not only can simulate the influence of different temperatures, pressures and drilling speeds on an ice layer so as to optimize a drilling parameter combination in real time, but also can synchronously map key indexes such as drill bit wear and system efficiency in combination with Internet of Things sensor data and a digital twinning technology. Besides, the collected bubble samples are subjected to component analysis through an integrated sensor array, and the characteristics of the microflora are dynamically displayed by using a metabolite identification model, so that accurate data support is provided for polar scientific investigation.

The invention relates to the field of building roofs, in particular to a high-wind-resistance leakage-free hidden roof system which is characterized in that unit house boards with clamping parts and protruding parts are arranged, horseshoe buckles and self-tapping screws are installed in the protruding parts of the adjacent unit house boards in a hidden mode, and the waterproofness, the weather resistance and the wind resistance are improved; meanwhile, each unit house plate adopts a double-layer structure of a metal base plate and a thermoplastic plate, and one end, far away from the clamping part, of each unit house plate is connected with the adjacent unit house plate through hot melting fixation to form an integral waterproof layer, so that the mounting flexibility is improved and the waterproof effect is enhanced; in addition, the system is additionally provided with a traction assembly for connecting the horseshoe buckles with the raised parts of the adjacent unit house plates, the middle parts of the raised parts are provided with concave parts, and when the raised parts expand outwards under the action of wind power, the traction assembly generates pulling force, so that the overall wind resistance of the roof plate is further enhanced, and a high-wind-resistance and leakage-free hidden roof solution is realized.

The invention provides a self-repairing microcapsule as well as a preparation method and application thereof, and belongs to the technical field of self-repairing of well cementation cement-based materials in oil and gas well engineering. The preparation method of the self-repairing microcapsule comprises the following steps: uniformly mixing gamma dicalcium silicate powder with nano calcium carbonate powder to obtain a capsule core material; the preparation method comprises the following steps: by taking a mixed solution of ethanol and water as a solvent, sequentially adding a silicon source, a capsule core material and a dispersing agent, uniformly dispersing to form sol, adjusting the pH value to 9-11, and carrying out hydrolytic polycondensation to obtain the silica-coated gamma-type dicalcium silicate and nano calcium carbonate microcapsule; adding the silica-coated gamma dicalcium silicate and nano calcium carbonate microcapsule into an EVA (Ethylene Vinyl Acetate) hot melt adhesive solution, and carrying out spray drying to obtain the self-repairing microcapsule. By the adoption of the technical scheme, the microcracks of the cement stone of the CO2 geological storage well can be effectively and efficiently repaired, and the long-term integrity of the cement stone of the deep well and safe and permanent storage of CO2 can be guaranteed.

The invention relates to the technical field of nondestructive testing, in particular to a PE (polyethylene) hot melting joint ultrasonic testing system and method based on hardness distribution. Hardness distribution data are collected, an internal microstructure is dynamically deduced, an ultrasonic anisotropy model is constructed, and a self-adaptive learning module is used for predicting local anisotropy tensor and sound velocity distribution; and performing predictive dynamic path compensation and multi-mode focusing on the ultrasonic waves. And finally, deeply fusing ultrasonic features, hardness distribution, a microstructure and a defect evolution physical model, and intelligently identifying defects through a neural network. The invention solves or at least relieves the bottleneck of precise recognition of complex defects of a microstructure of the PE hot-melt joint and deep fusion detection of multi-modal data, and provides the ultrasonic detection system and method for the PE hot-melt joint based on hardness distribution, so that precise evaluation of internal defect types, severity and material performance is realized, and the service safety and reliability of a PE pipeline are improved.

The invention discloses an expressway hot melt marking quality analysis method and system, and relates to the technical field of marking quality analysis. The invention discloses a quality analysis system for a hot-melt marking line of an expressway. The quality analysis system comprises a hot-melt marking line data modeling module and a hot-melt marking line quality analysis module, according to the method, independent tracking data is established for each section of hot melt marking in the same construction period, quality analysis of information such as construction time, space coordinates, raw material batches and technological parameters is ensured, data confusion under different construction conditions can be avoided, and therefore the marking quality analysis and management precision is remarkably improved; through conjoint analysis of three types of data of traffic section indexes, traffic flow indexes and raw material indexes, and by utilizing a full-connection neural network and a hierarchical task analysis model, shared features are extracted, and comprehensive effects of three major elements of environment, traffic and materials on marking quality are revealed.

The invention belongs to the technical field of superconducting cables, and discloses a superconducting cable, a preparation method and a preparation device.The preparation method of the superconducting cable comprises the steps that a core wire, X superconducting wires and Y carbon fibers are prepared, the X superconducting wires and the Y carbon fibers are used for being woven on the surface of the core wire, and Y is smaller than or equal to X; spirally winding a hot melt adhesive film on the surfaces of the Y carbon fibers; the core wire, the superconducting wires and the carbon fibers are woven in a heating environment, and the X superconducting wires and the Y carbon fibers wound with the hot melt adhesive films are woven on the surface of the core wire under the heating condition; cooling the heated and braided superconducting cable through conveying; and after cooling, wrapping an insulating layer outside the superconducting braid layer formed by the superconducting wires and the carbon fibers. In conclusion, the superconducting braid layer of the superconducting cable is formed by mixing and weaving the superconducting wires and the carbon fibers, and the hot melt adhesive film is spirally wound on the surfaces of the carbon fibers, so that the core wires, the superconducting wires and the carbon fibers are bonded with one another after weaving, and the structural strength of the whole cable is improved.

The automatic assembling machine comprises a machine body, a positioning rod, a first hot melting mechanism and a second hot melting mechanism, the positioning rod is attached to the machine body through the first end of the positioning rod, and the second end, opposite to the first end, of the positioning rod can allow the hair roller to be arranged on the positioning rod in a sleeving mode; the first hot melting mechanism and the second hot melting mechanism can be used for respectively sticking two ends of a hair band to a hair cylinder in a hot melting manner; the automatic assembling machine further comprises at least one radial resisting component, and the radial resisting component is configured to be suitable for abutting against the second end of the positioning rod and exert force on the positioning rod in the direction supporting the positioning rod to resist the crimping force of the first hot melting mechanism and the second hot melting mechanism so as to prevent the positioning rod from plastic deformation under the action of the crimping force. Compared with the prior art, the scheme can prevent the positioning rod from plastic deformation.

The invention discloses a single-component polyurethane liquid glue which comprises a hydroxyl-terminated polyurethane prepolymer, polyol and isocyanate, and the molar ratio of an isocyanate group to a hydroxyl group is (1.01-5): 1; the hydroxyl-terminated polyurethane prepolymer comprises aliphatic or / and alicyclic isocyanate and polyol, and the molar ratio of an isocyanate group to a hydroxyl group is (0.5-0.99): 1. The preparation method comprises the following steps: firstly, synthesizing a hydroxyl-terminated polyurethane prepolymer, and then taking the hydroxyl-terminated polyurethane prepolymer as a main material to react with a small part of polyhydric alcohols and isocyanate. The polyurethane liquid adhesive synthesized by the two-step method has the performance advantages of high initial adhesion and low hardness, meets the process requirement of normal-temperature coating, can replace an adhesive film product and a hot melt adhesive product, and is applied to composite bonding of fabrics in the textile industry.

The invention relates to a counter hot melt adhesive material with high viscosity, and belongs to the technical field of hot melt adhesives. The counter hot melt adhesive material with high viscosity provided by the invention is prepared from the following raw materials in parts by weight: 41.5 to 42.5 parts of TPU, 55.5 to 56.5 parts of EVA and 1 to 3 parts of functional aids, and the functional aids comprise POE-g-MAH, a tackifying system, nano boron nitride with the surface grafted with a silane coupling agent, an antioxidant 1076, dibenzoyl peroxide, epoxy-terminated silicone oil and white mineral oil. According to the counter hot melt adhesive material provided by the invention, all the components cooperate with one another, so that the counter hot melt adhesive material can still keep relatively high viscosity in a humid and hot environment, and the requirements of practical application are met.

The utility model provides a hot-melt welding device for forming a box by using a hollow plate, which comprises a rack provided with a working surface and a cross beam, a box plate positioning strip is arranged on the working surface, and the cross beam is erected above the working surface; the hot melting guide-in plate is provided with a guide-in opening which is opened towards the left side, is used for supporting one side of the boxboard, and is arranged below the cross beam through a first connecting frame; the hot air gun is connected with the beam through a moving mechanism, and the heating end of the hot air gun enters or exits from the hot melting position through up-and-down and left-and-right movement; the front pressing wheel set and the rear pressing wheel set are used for conveying the boxboards and pressing the hot-melted boxboards correspondingly. The device is simple in overall structure, low in maintenance cost and high in hot melting welding efficiency; and the conveying and welding stability of the boxboards is improved.

The invention relates to the technical field of fractured stratum reinforcement, in particular to a fractured stratum rapid isolating and reinforcing device and method based on deep drilling lining repair. The device comprises drilling equipment, a double-film lining structure, an electric inflator pump, an ultraviolet curing piece and a controller. The double-membrane lining structure comprises an outer hose and an inner membrane tube; the outer hose is made of glass fiber reinforced thermoplastic plastics, the inner film pipe is arranged outside the drill rod in a sleeving mode, and the two ends of the inner film pipe are fixed to the drill rod in a sealed mode. The length of the outer hose is smaller than that of the inner film in the pipe, the outer hose adheres to the middle end of the inner film pipe through hot melt adhesive, an air guide opening is formed in the end, away from the drill bit, of the inner film pipe, and the inflator pump is communicated with the air guide opening through an air guide pipe. And the ultraviolet curing piece is arranged on the outer wall of the drill rod in the inner membrane tube. According to the device, the outer hose is tightly attached to the hole wall, then ultraviolet rays can be evenly irradiated to the outer hose through the ultraviolet emitter, rapid and complete curing of the outer hose is achieved, and the efficiency and safety of drilling operation are improved.