7730 results about "Hot melt" patented technology

The invention relates to the field of hot melt adhesives, and discloses a biodegradable hot melt adhesive based on castor oil and rosin resin and a preparation process thereof, the biodegradable hot melt adhesive comprises EVA resin, modified castor oil, rosin resin, a modified additive, a lubricant and an antioxidant; the modified castor oil is prepared by crosslinking castor oil and isophorone diisocyanate and reacting lignin, 1, 4-butanediol and isocyanate groups; the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, and the modified castor oil and the modified additive are added, so that the modified castor oil and the modified additive are added, and the modified castor oil and the modified additive are added; the tensile property and the adhesive property of the hot melt adhesive are improved, and meanwhile, the flame retardant property and the high and low temperature resistance of the hot melt adhesive can be improved.

The invention belongs to the field of adhesive properties of high polymer materials, and particularly relates to a copolyamide hot melt adhesive and a preparation method thereof. Dimer acid, propionic acid, hexamethylenediamine and 1, 3-diamino-2-propanol are used as raw materials to prepare polyamide resin, and then modified organic silicon and carboxylated nano silicon dioxide are used for modification to obtain the copolyamide hot melt adhesive. Polyamide resin is modified by adding organic silicon into the polyamide resin, macromolecular chain segments are easy to rotate due to introduction of flexible Si-O bonds, part of internal stress can be eliminated, fracture energy can be absorbed to the maximum extent, and the fracture performance of the resin is effectively improved; in addition, due to the introduction of the inorganic nanoparticles, the rigidity, stability and the like of the nanoparticles can be combined with the toughness, cohesiveness and the like of the graft polymer, so that the graft polymer has excellent properties of both the inorganic nanoparticles and the organic polymer.

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 utility model provides a nixie tube casing assembling device, which is used for hot melting assembling between a PCB (printed circuit board) and a nixie tube casing, and comprises a base, and a platform of the base is provided with the following devices: a horizontal transfer device, which comprises a first conveyor belt and a second conveyor belt which are parallel to each other and have a space gap, a detection position, an assembly position and a hot melting position are sequentially arranged in a space gap between the first conveying belt and the second conveying belt; the first feeding device is arranged at the front end of the horizontal transferring device and used for conveying the PCBs to the input end of the horizontal transferring device; the second feeding device is arranged on one side of the horizontal transferring device and used for conveying the nixie tube shell to the assembling position of the horizontal transferring device; the hot melting welding device is used for heating and pressurizing the nixie tube workpiece on the hot melting position, so that the nixie tube shell and the PCB are welded together in a hot melting mode. The full-automatic assembling and hot melting machine has the advantages that full automation of feeding, assembling and hot melting of the nixie tube shells and the PCBs is achieved, and the production efficiency of nixie tubes is greatly improved.

The invention discloses a hot melt adhesive suitable for a water-based coating waterproof coiled material, the waterproof coiled material sequentially comprises a base material, a connecting layer and an anti-sticking coating, the connecting layer is formed by the hot melt adhesive, the anti-sticking coating is formed by a water-based resin emulsion, the hot melt adhesive comprises a plasticizer, tackifying resin, functional resin and a thermoplastic elastomer, and the anti-sticking coating is formed by the plasticizer, the tackifying resin, the functional resin and the thermoplastic elastomer. The functional resin contains one or more of abietic acid, pinolenic acid and pimaric acid, the content of carboxyl in the functional resin is 0.90 mmol / g-2. 80 mmol / g, and carboxyl in the hot melt adhesive is used for forming chemical bond combination with amino in the water-based resin emulsion. The hot melt adhesive disclosed by the invention has a low surface contact angle and high surface energy, the resin emulsion of the anti-sticking coating can be well wetted on the surface, and meanwhile, the resin emulsion and the coating have stable bonding force, so that a full-sticking structure is ensured to be formed after a water-based coating type waterproof roll is constructed and poured with concrete.

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 relates to the technical field of plastic granulation, in particular to an opposite flow cooling device and a polymer plastic granulator. The opposite flow cooling device comprises a water cooling tank, a cooling device and a cooling device, wherein a bearing structure is arranged in the water cooling tank in the length direction of the water cooling tank; the control assembly is used for being connected with the water cooling tank and the bearing structure, a liquid level sensor is arranged at the top of the control assembly, and the liquid level sensor can adjust the control assembly to act according to the real-time water level in the water cooling tank so that the bearing structure can be located at the half position of the water level; the circulating assembly is arranged on the water cooling tank, two sets of sleeving pipes are arranged on the circulating assembly, and the cooling liquid entering the circulating assembly can be sprayed out through the sleeving pipes; and the traction structure is used for connecting the control assembly and the sleeving pipe, and the traction structure can change the spraying angle of the cooling liquid when the control assembly acts, so that the cooling effect is improved. The macromolecular plastic granulator comprises the opposite flow cooling device, a hot melt extrusion device and a granulating device.

The invention relates to the technical field of shoe materials, in particular to a double-effect high and low temperature film which comprises a TPU high temperature layer, a hot melt adhesive layer, a polyurethane bottom layer, a middle layer and a polyurethane surface layer, and the polyurethane surface layer is a reversible temperature change surface layer formed by coating and drying surface layer slurry containing temperature sensing color change microcapsules; the thermochromic microcapsule has a double-layer wall material, the inner layer is a sulfydryl modified silicon dioxide shell, and the outer layer is an acrylate modified polyurethane shell. The reversible temperature change high polymer material is introduced into the polyurethane surface layer, the color disappears to form a semitransparent effect when the temperature is higher than the critical temperature, and the color changes back to a solid color effect when the temperature is lower than the critical temperature, so that the thermochromic effect is realized; through ultraviolet irradiation, sulfydryl in the sulfydryl modified silicon dioxide shell in the thermochromic microcapsule and acrylate in the acrylate modified polyurethane shell can be subjected to a click reaction to generate a new molecular chain, so that normal repair is realized, and the structural integrity and impact resistance of the microcapsule are enhanced.

The invention discloses a rubber tire vulcanization molding process of an electromagnetic heating gas medium, which comprises the following steps: electromagnetic heating, a heat transfer medium and cyclic utilization of the gas medium, especially carbon dioxide gas; comprising the steps that a rubber tire blank is placed in a mold cavity of a mold wrapped by a lower hot plate, an upper hot plate and a mold sleeve, and a curing bladder formed by the rubber tire extends into a rubber tire blank ring; carbon dioxide gas is heated through the gas medium heating assembly to form a high-temperature carbon dioxide gas medium, an outer temperature heating cycle is established on the outer side of the rubber tire blank, and an inner temperature heating cycle is established on the inner side of the rubber tire blank; cooling and shaping after the vulcanization molding process requirement is met; and vacuumizing the curing bladder, opening the mold, and taking out the tire. According to the method, water is not needed, fossil energy such as coal and natural gas does not need to be consumed, generation of waste gas in the vulcanization process is greatly reduced, carbon dioxide gas which is not flammable, explosive and corrosion-free and has a high specific hot melting value is adopted as a heat transfer medium, recycling is achieved, and real energy conservation and environmental protection are achieved.

The invention relates to an automobile plastic part injection mold oblique tripping mechanism which comprises a core pulling block used for forming an inverted buckle and a pouring gate arranged on the core pulling block, the pouring gate comprises a main runner and a submarine ox horn runner, the main runner is used for bearing hot melt plastic, and the submarine ox horn runner is used for bearing the hot melt plastic. The ox horn runner is communicated with the main runner and a cavity used for forming an inverted buckle on the mold, a mounting cavity is formed in the core-pulling block, a mounting seat is connected in the mounting cavity in a sliding manner, a communicating hole communicated with the mounting cavity and the main runner is formed in the core-pulling block, an ejector rod is arranged on the mounting seat and extends into the communicating hole, and the ejector rod is connected with the mounting seat in a sliding manner. A first control mechanism is arranged on the core pulling block and used for controlling the installation base to slide so as to drive the ejector rod to move into the main runner. While it is guaranteed that the automobile plastic part inverted buckle is completely formed, waste and the inverted buckle are automatically separated when the mold is opened, the inverted buckle is prevented from being pulled, and therefore the side contour edge of the inverted buckle is prevented from being pulled and deformed.

The invention relates to the technical field of hot melt adhesives, in particular to a UV hot melt adhesive transfer coating quality monitoring system. Firstly, a base material image and a coating image collected by a camera are obtained; then, respectively inputting the base material image and the coating image into a base material feature recognition model and a coating feature recognition model for recognition, and calculating to obtain a first thickness uniformity monitoring value and a second defect feature monitoring value; the thickness uniformity monitoring value and the defect characteristic monitoring value are used for evaluating the thickness uniformity degree and the defect degree, so that the accuracy and the reliability of UV hot melt adhesive transfer coating quality monitoring are improved; thirdly, comprehensively evaluating the first thickness uniformity monitoring value and the second defect characteristic monitoring value to obtain a coating quality monitoring value; and finally, comparing the coating quality monitoring value with a coating quality monitoring threshold value, if the coating quality monitoring value exceeds the threshold value, judging that the coating quality monitoring value is unqualified, otherwise, generating colloid temperature monitoring information according to a data result of the colloid temperature prediction model.

The invention discloses a flow drilling hot melting screw joint process of a thermoplastic composite material and a light alloy, which specifically comprises the following steps of: overlapping a thermoplastic composite material plate and a light alloy plate in a form that the thermoplastic composite material plate is arranged on the upper part and the light alloy plate is arranged on the lower part, and then fixing; a flow drilling self-tapping screw is used as a connecting medium, flow drilling equipment is used for carrying out flow drilling hot melting screw joint, the rotating speed of the flow drilling stage is 6000-8000 r / min, the downward pressure is 0.4-0.8 kN, and the process time of the flow drilling stage is 5-20 s. According to the flow drilling hot melting screw joint process of the thermoplastic composite material and the light alloy, the thermal effect of the flow drilling self-tapping screw in the connecting process is used for enhancing the material flow of the thermoplastic composite material and the light alloy to form a melting layer effect at a material lamination interface; the reinforced composite connection effect of mechanical connection and welding of the composite material / light alloy is achieved, the applicability is high, operation is easy, the sealing performance is good, the connection firmness is good, and the application prospect is good.

The invention relates to the technical field of water heating pipeline installation, and discloses an auxiliary support for water heating pipeline installation, which comprises a bottom plate, a first moving assembly is arranged on the bottom plate, an adsorption box is installed on the first moving assembly, a hollow shaft is rotatably connected to the adsorption box, an adsorption opening is formed in the hollow shaft, and the adsorption opening is communicated with the adsorption box. A draught fan is fixed to the lower portion of the adsorption box, a motor assembly for driving the hollow shaft to rotate is arranged in the adsorption box, electric clamping jaws for clamping the water heating pipeline are arranged on the two sides of the adsorption box correspondingly, and a second moving assembly for adjusting the moving positions of the electric clamping jaws is arranged on the bottom plate. A plurality of moving wheels are fixed below the bottom plate; and dust and impurities on the hot melting part of the water heating pipeline can be conveniently cleaned through the rotating brush cleaning block, and can be discharged through the fan, so that dust and impurity residues on the hot melting part of the water heating pipeline are reduced, and the hot melting connection quality of the water heating pipeline is favorably improved.

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 double-85-resistant long carbon chain nylon material as well as a preparation method and application thereof. The double-85-resistant long carbon chain nylon material is prepared from the following components in percentage by mass: 5-12% of a compatilizer, 3-10% of epoxy resin, 3-10% of a nylon hot melt adhesive, 1-3% of a coloring agent, 0.2-1% of an antioxidant, 0.2-0.7% of a lubricant, 0.2-0.5% of a heat stabilizer and the balance of polyamide resin. Through the innovative material and process design, the bonding strength of the bonding layer between the long-chain nylon and the thermoplastic elastomer (TPE) can be remarkably improved, and it is ensured that the key connecting part can still maintain the excellent bonding performance without failure even though the key connecting part is subjected to long-term high-temperature, high-humidity and other extreme environments.

The invention discloses a preparation method of a low-salt-permeability bipolar membrane, and belongs to the field of bipolar membrane preparation, aiming at the inherent characteristic that in a tape casting process, an anion membrane layer is difficult to form a cross-linked structure, the high selectivity of the anion membrane layer and a good middle interface layer formed by an anion membrane layer and an anion membrane layer are separately designed, and after the surface of an cation membrane layer is coated with a water dissociation catalyst, the cation membrane layer is separated from the anion membrane layer. Coating a negative film polymer solution to form a relatively thin negative film layer, then attaching a high-selectivity negative film, and fixing all the film layers together by using a hot melting process to form a whole body; the first anion membrane layer is a thin anion membrane layer formed by coating, the key point of the design is that the bipolar membrane is low in water dissociation voltage, the second anion membrane layer is a high-selectivity anion membrane layer, and the membrane layer ensures low salt permeation of the bipolar membrane; the positive membrane layer, the first negative membrane layer and the second negative membrane layer are all designed to be fused together through a hot melting process, and the prepared bipolar membrane has low salt permeability and low water dissociation voltage.

The invention discloses a rubber sealing ring performance detection device, and belongs to the field of sealing ring detection, the rubber sealing ring performance detection device comprises a rubber sealing ring detection table, the top of the rubber sealing ring detection table is provided with a segmentation detection driving unit and a segmentation detection mechanism, and the segmentation detection driving unit and the segmentation detection mechanism are respectively used for providing clamping, stretching and friction driving during rubber sealing ring segmentation detection; and detecting the tensile strength and wear resistance of the segmented rubber sealing ring. The segmented detection driving unit is arranged to be matched with the segmented detection mechanism, the rubber sealing rings can be clamped and detected in a segmented mode, the rebound pressure of the rubber sealing rings is detected based on the Newton's third law, the tensile strength of the rubber sealing rings at all positions is obtained, and the abrasion loss of the rubber sealing rings in the detection process is judged according to the abrasion loss of the rubber sealing rings in the detection process. The wear resistance of each rubber sealing ring can be known, so that whether the wear resistance and the tensile strength of the formed sealing ring are poor due to the material or subsequent injection molding and hot melting forming can be known, and the effect of accurately analyzing the detection result can be achieved.

The invention belongs to the technical field of automobile parts, and particularly discloses a GMT composite material automobile roof and a preparation method thereof. The GMT composite material automobile roof comprises a GMT composite board layer, a hot melt adhesive layer and a fabric layer, and is characterized in that the GMT composite board layer comprises the following components in parts by weight; comprising the following raw materials: 90-100 parts of composite fiber felt, 22-30 parts of modified bamboo fiber, 3-5 parts of tea tree oil, 1-2 parts of sodium tripolyphosphate, 2-4 parts of beta-glycerophosphate disodium, 0.5-0.8 part of lecithin, 15-20 parts of modified talcum powder, 4-6 parts of an expandable microsphere foaming agent and 190-200 parts of deionized water. The GMT composite material automobile ceiling prepared in the invention has excellent mechanical strength, durability and aging resistance, can provide mechanical protection for parts, and prolongs the service life of the automobile ceiling.

The invention relates to the field of automobile roofs, and particularly discloses a low-odor dry ceiling and a manufacturing method thereof. The invention discloses a low-odor dry ceiling and a manufacturing method thereof. The low-odor dry ceiling comprises a non-woven fabric, a first chopped glass fiber layer, a first adsorption bonding layer, a first hot melt adhesive film layer, a polyurethane foam layer, a second chopped glass fiber layer, a second adsorption bonding layer, a second hot melt adhesive film layer and a fabric layer which are sequentially connected, each of the first adsorption bonding layer and the second adsorption bonding layer comprises high-density polyethylene powder and an adsorbent, the addition amount of the adsorbent is 15-25wt% of that of the high-density polyethylene powder, the adsorbent is silicon dioxide aerogel modified composite activated carbon, and the composite activated carbon comprises microporous activated carbon and mesoporous activated carbon in a mass ratio of (2.56-3.12): (1.12-2.05); in addition, the preparation method disclosed by the invention has the advantage of reducing odor and VOC (Volatile Organic Compounds) in the production and use processes of the automobile roof.

The invention discloses a waterproof sealing flexible hot melt adhesive and a preparation method thereof, and relates to the field of hot melt adhesives. The waterproof sealing flexible hot melt adhesive is prepared from 65 to 70 parts of EVA (Ethylene Vinyl Acetate) resin, 20 to 22 parts of POE (Polyolefin Elastomer), 5.5 to 6.5 parts of maleic anhydride grafted POE, 4.2 to 4.8 parts of SIS (Styrene Isoprene Styrene) block copolymer, 1.2 to 1.8 parts of maleic anhydride grafted SIS block copolymer, 15 to 20 parts of tackifier, 4 to 6 parts of viscosity modifier and 1 to 1.5 parts of antioxidant. According to the hot melt adhesive, the EVA resin, the POE polyolefin elastomer and the SIS block copolymer are matched, and the compatibility of the EVA resin, the POE polyolefin elastomer and the SIS block copolymer is improved through the maleic anhydride grafted POE polyolefin elastomer and the maleic anhydride grafted SIS block copolymer, so that the hot melt adhesive with a good bonding effect on a film-coated paper box and a good low-temperature-resistant effect can be obtained; and the bonding durability of the film-coated paper box in a humid environment or a low-temperature environment can be effectively improved.

The invention belongs to the technical field of hot melt adhesives, and particularly relates to a polyurethane hot melt adhesive composition and application thereof. The polyurethane hot melt adhesive composition comprises the following components in parts by weight: 40-50 parts of polyester polyol; 20 to 25 parts of bio-based polyether polyol; 25 to 30 parts of bio-based isocyanate; 15 to 20 parts of functionalized polydopamine; 5-10 parts of a filler; 0.5 to 0.8 part of a catalyst; 0.5 to 1 part of a coupling agent; 1-3 parts of a chain extender; the bio-based polyether polyol and the bio-based isocyanate are added into the components of the polyurethane hot melt adhesive composition provided by the invention, so that the polyurethane hot melt adhesive composition is better in environmental protection performance, and the polyurethane hot melt adhesive is modified by adding the functionalized polydopamine; the polyurethane hot melt adhesive composition with good cohesiveness, mechanical property, water resistance, flame retardance and antibacterial property is prepared, and is suitable for use requirements in different fields.

The invention discloses an online thickness measuring device and a using method, and belongs to the technical field of wire harness adhesive tape production. The online thickness measuring device comprises a first thickness measuring assembly and further comprises a second thickness measuring assembly, a base material is arranged in the first thickness measuring assembly, an adhesive tape is arranged in the second thickness measuring assembly, a fixing box is arranged above the first thickness measuring assembly, and a measuring roller and a lifting roller are arranged in the first thickness measuring assembly. In order to solve the problems that during wire harness adhesive tape production, the adhesive output amount of a coating machine is difficult to quickly judge, and the quality of the produced adhesive tape is unstable, the thickness of a determined area of a base material is measured firstly, and then the thickness of the adhesive tape coated in the determined area of the base material is measured, so that two groups of corresponding thickness data are obtained; and finally, the thickness of the adhesive tape subtracts the thickness of the base material to obtain the thickness of the hot melt adhesive in a determined area, and personnel can adjust the adhesive output of the coating machine according to the thickness of the hot melt adhesive, so that the quality of the produced adhesive tape is stabilized.

The invention provides a camera-shooting-guided deicing unmanned aerial vehicle for a wind power blade, and relates to the technical field of wind power plant maintenance equipment, the camera-shooting-guided deicing unmanned aerial vehicle comprises a main body, the whole main body is of a square structure, and a plurality of aircrafts are arranged at the top of the main body; the central control chip is arranged in the main body and is used for controlling each part of the main body; and the identification assembly is arranged on one side of the main body and is used for carrying out searchlighting identification on the surface of the wind power blade. According to the device, through a multi-sensor fusion technology and an identification program of a central control chip, the position, the thickness and the coverage area of an ice layer can be accurately judged, and the accuracy and the efficiency of deicing operation are improved. And meanwhile, the beating assembly and the hot melting assembly are combined, two deicing modes of mechanical beating and thermal assistance are provided, different types of ice layers are effectively treated, and the deicing efficiency is remarkably improved.

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 provides hot melt adhesive coating equipment, and belongs to the technical field of processing machinery, the hot melt adhesive coating equipment comprises a first emptying shaft group, a stretching shaft group, a coating compression roller group and a second emptying shaft group which are arranged in sequence; the stretching shaft group comprises a plurality of discharging shafts which are continuously arranged and is used for discharging and guiding a first base material; the stretching shaft group comprises a stretching shaft A, a stretching shaft B, a stretching shaft C and a stretching shaft D which are oppositely arranged in pairs, and is used for stretching the first base material by adjusting the up-down and left-right positions of the stretching shafts A, B, C and D, so that the front covering effect of the first base material is changed into a new pattern; the stretching shaft group comprises two coating compression rollers which are tightly connected, and the two coating compression rollers rotate relatively to form advancing power of the first base material and the second base material and are used for carrying out compression roller type coating treatment on the first base material and the second base material; the problem that an existing stretching mechanism is difficult to finely adjust the surface texture of a base material can be solved.

The present invention provides an electrolyte-resistant hot melt tape, which comprises a PET substrate and a rubber hot melt adhesive layer coated on its surface. The rubber hot melt adhesive layer comprises the following components in parts by weight: 60-160 parts of styrene-butadiene rubber, 10-40 parts of maleic anhydride-modified polyolefin, 1-5 parts of epoxy curing agent, 10-40 parts of hydroxyl-terminated liquid polybutadiene, 1-5 parts of polyisocyanate curing agent, and 20-60 parts of rosin tackifying resin. The rubber hot melt adhesive layer of the electrolyte-resistant hot melt tape is tightly compounded with the polar PET substrate. At the same time, the moderate cross-linking between the components of the rubber hot melt adhesive layer can reduce the infiltration of the electrolyte, so that the electrolyte-resistant hot melt tape has excellent bonding strength before and after being immersed in the electrolyte, does not bubble or delaminate, improves the passing rate of the battery drop test, meets the requirements of the lithium battery industry for tape products, and improves the battery safety factor.

The invention relates to the technical field of biaxially oriented films, in particular to a low-noise tackifying non-adhesive film for digital printing and a preparation method thereof.The low-noise tackifying non-adhesive film for digital printing comprises a release functional layer, a core layer and a tackifying hot melt adhesive layer which are sequentially arranged, the release functional layer comprises 0.5-2.5 wt% of amino siloxane grafted polypropylene and homo-polypropylene, and the surface energy of the release functional layer is 24-26 dyn / cm; the core layer comprises homo-polypropylene; the tackifying hot melt adhesive layer is prepared from an ethylene-vinyl acetate copolymer A, 5 to 10 weight percent of ethylene-vinyl acetate copolymer B and 0.2 to 0.5 weight percent of polysiloxane elastomer. The low-noise tackifying glue-free film for digital printing belongs to a biaxially oriented polypropylene film, does not need secondary coating processing, is energy-saving and environment-friendly, is smooth to wind and unwind in the production and application processes, is low in unwinding noise, effectively ensures the compounding fastness between the film and a printed piece, and is high in practicability. The method is especially suitable for film coating of digital printing pieces with high silicone oil and wax content.

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.

The invention relates to the field of polyurethane hot melt adhesives, and particularly discloses a moisture-curing reaction type polyurethane hot melt adhesive for bags and suitcases and a preparation method of the moisture-curing reaction type polyurethane hot melt adhesive. The moisture-curing reaction type polyurethane hot melt adhesive is prepared from the following raw materials in parts by weight: 10 to 20 parts of polyether polyol, 40 to 60 parts of polyester polyol, 20 to 50 parts of isocyanate, 0.5 to 1.5 parts of a catalyst, 10 to 20 parts of tackifying resin, 3 to 5 parts of a viscosity stabilizer, 1 to 3 parts of pentaerythritol diacrylate, 5 to 10 parts of an auxiliary agent and 3 to 5 parts of a coupling agent, according to the moisture-curing reaction type polyurethane hot melt adhesive for the bags and suitcases, the polyether polyol, the polyester polyol and the isocyanate react to generate a polyurethane prepolymer, so that the hot melt adhesive has relatively good flexibility and durability; and the tackifying resin, the pentaerythritol diacrylate and the viscosity stabilizer are used for promoting the polyurethane hot melt adhesive to have better initial adhesion and final adhesion strength, so that the polyurethane hot melt adhesive can be firmly adhered to a base material more quickly.