747 results about "Polyurethane adhesive" patented technology

The invention relates to the technical field of non-woven fabrics, in particular to a production process of a functional fiber woven non-woven fabric body, the non-woven fabric body comprises a non-woven fabric base body, middle layers are arranged on the upper portion and the lower portion of the non-woven fabric base body, and outer layer bodies are arranged on the outer sides of the middle layers; the middle layer is compounded with the upper part and the lower part of the non-woven fabric base body through polyurethane glue, and the dosage of the polyurethane glue is 20g / m < 2 >; the non-woven fabric body is formed by mutually matching a non-woven fabric base body, a middle layer and an outer layer body, the non-woven fabric base body is formed by weaving first modified spandex fibers and polyester fibers, the middle layer is formed by interweaving second modified polyester fibers and hemp fibers, and the outer layer body is formed by spraying an outer layer agent. The product is excellent in wear resistance, stain resistance, heat preservation and breaking strength, remarkable in comprehensive coordination effect and excellent in washing resistance and ultraviolet stability resistance.

The invention relates to the technical field of organic polymer adhesives, and particularly discloses a modified castor oil-based polyurethane adhesive as well as a preparation method and application thereof. The adhesive comprises two components, and the component A comprises the following components in parts by weight: 30.0-50.0 parts of modified castor oil and 0.0-30.0 parts of refined castor oil; the component B is prepared from the following components in parts by weight: 30.0 to 50.0 parts of polyisocyanate or a polyisocyanate modifier and 0.00 to 0.05 part of a dewatering agent; the modified castor oil is prepared from refined castor oil and cysteamine through a sulfydryl-alkene addition reaction. Amido of the modified castor oil is alkalescent, and the reaction speed of the modified castor oil and isocyanate groups is high; hydrogen bonds are easily generated between urea bonds generated by the reaction of amino groups and isocyanate groups, so that the adhesive is endowed with thixotropy and high strength. The adhesive disclosed by the invention is simple in composition, high in reaction speed and good in thixotropy and bonding strength.

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 polyurethane adhesives, in particular to the field of IPC C09J175, and more particularly relates to a small molecule chain extender, a preparation method thereof and red polyurethane adhesive. The small molecule chain extender is prepared from the following raw materials: dichloroanthraquinone and ethanolamine, and the red polyurethane adhesive is prepared from the small molecule chain extender, polyol, isocyanate and a solvent. A red colored group is introduced into a polyurethane molecular chain, and the colored group is used as a part of a chain extender, so that the color migration resistance and the transparency are improved at the same time.

The invention discloses a bamboo longitudinal and wood transverse composite whole container bottom plate and a preparation method thereof, and belongs to the field of bamboo-wood composite materials. The bottom plate is of a seven-layer alternate paving structure and is formed by compositing transverse wood veneer layers and longitudinal radial bamboo curtain layers, wood veneers are made of lignin modified polyurethane adhesive (reinforced by nano-silicon dioxide), and bamboo curtains are made of bamboo fiber nano-crystal reinforced soybean protein adhesive (cross-linked by genipin). Through continuous paving, fixed-length saw cutting and a'cold-in-cold-out 'hot pressing process (the pressure is 1.5-8.0 MPa, and the temperature is 140-220 DEG C), whole-piece production of any length is achieved. According to the technology, the bamboo-wood interface bonding problem is solved, the bending strength reaches 120 MPa, the interlayer shear strength is 7.8 MPa, the strength retention rate after damp-heat aging resistance is 90%, the formaldehyde emission is smaller than or equal to 0.05 mg / m < 3 >, the bio-based carbon content is 85%, high strength, weather resistance and environment friendliness are achieved, a traditional spliced container bottom plate can be replaced, the material utilization rate is increased by 20% or above, and the manufacturing cost is remarkably reduced.

The invention relates to the technical field of fire extinguishing microcapsules, in particular to a high-airtightness perfluorohexanone fire extinguishing microcapsule and a preparation method and application thereof.The perfluorohexanone fire extinguishing microcapsule comprises a composite shell layer and a fire extinguishing core, and the composite shell layer is made of ethylene-vinyl alcohol copolymer resin and silicon dioxide nanoparticles; the fire extinguishing core is a perfluorohexanone fire extinguishing agent and is applied to preparation of indoor fire extinguishing pastes, fireproof coatings and polyurethane adhesive materials. According to the perfluorohexanone fire extinguishing microcapsule disclosed by the invention, the diffusion of low-polarity perfluorohexanone is effectively prevented by utilizing the strong hydrogen-bond interaction between hydroxyl groups in the ethylene-vinyl alcohol copolymer resin, and especially under the condition of relatively high temperature, the perfluorohexanone fire extinguishing microcapsule has a good fire extinguishing effect. The problem that an existing perfluorohexanone fire extinguishing microcapsule is poor in long-term air tightness under the condition of high encapsulation efficiency is effectively solved, and meanwhile harmful substances such as formaldehyde cannot be generated.

The invention relates to the technical field of polyurethane structural adhesives, in particular to a two-component polyurethane structural adhesive and a preparation method thereof. Comprising a component A and a component B. The component A comprises, by weight, 70-130 parts of polyether polyol, 1-5 parts of a chain extender, 5-10 parts of a flame retardant, 6-12 parts of a first dewatering agent, 3-5 parts of a thixotropic agent, 0.06-1 part of a catalyst and 110-200 parts of a modified heat-conducting filler. The component B is prepared from 70 to 130 parts of polyurethane prepolymer, 0.5 to 2 parts of second dewatering agent and 110 to 200 parts of modified heat-conducting filler; the technical problems that in the prior art, a polyurethane system adhesive is serious in cohesive strength attenuation under the working condition of 80 DEG C and low in high-temperature shear strength retention rate are solved by providing the double-component polyurethane structural adhesive.

This application relates to the field of polyurethane adhesive technology, and provides a thermally conductive polyurethane structural adhesive and its preparation and application methods. The thermally conductive polyurethane structural adhesive includes a first component and a second component. The first component includes a modified bio-based polyol, a polythiol, a thermally conductive filler, a first dehydrating agent, a thixotropic agent, a first catalyst, and a second catalyst. The second component includes an epoxy resin, a diisocyanate, a polyisocyanate, a thermally conductive filler, a coupling agent, a second dehydrating agent, a dispersant, and a retarder. The modified bio-based polyol is selected from at least one of modified castor oil polyol, modified oil polyol, and modified cashew nut shell oil polyol. The polythiol is selected from at least one of trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetra(3-mercaptopropionate), butanediol mercaptopropionate, and polythiol. This configuration allows the thermally conductive polyurethane structural adhesive to have a longer open time and to rapidly cure at room temperature in a short time, resulting in high initial strength.

The invention relates to the technical field of packaging materials, in particular to a preparation method of a food heat-preservation environment-friendly quick-transportation packaging bag. The prepared quick-transportation packaging bag sequentially comprises an outer film layer, a heat preservation layer, an aluminum foil layer and an inner film layer from outside to inside. The outer film layer and the inner film layer are made of a blend of polylactic acid, carboxymethyl starch and glycerol, the thermal insulation layer is formed by compounding a phase change capsule, silicon dioxide aerogel and a polyurethane adhesive on an aluminum foil layer, the phase change capsule takes a mixture of n-octadecane and paraffin as a core material and takes Arabic gum as a wall material, and the outer surface of the wall material is coated with a stearic acid film layer; an antibacterial coating containing microwave modified beewax, a functional additive and 3-aminopropyltriethoxysilane is sprayed on the inner surface of the inner film layer; the prepared quick-transportation packaging bag has excellent heat preservation performance and antibacterial performance, also has good degradability, is environmentally friendly and can meet multiple requirements of modern food logistics for packaging.

The invention relates to the technical field of polyurethane materials, in particular to a non-MOCA type fitness equipment rubber coating material and a preparation method thereof. The preparation method comprises the following steps: adding polytetrahydrofuran, isophorone diisocyanate, 1, 4-butanediol, a 2, 2-dimethylolpropionic acid solution, a hydroxyl chain extender, triethylamine, deionized water and a flame-retardant filler to obtain a polyurethane emulsion; and coating the polyurethane emulsion to form a film, and drying to obtain the polyurethane adhesive film. Adding the flame-retardant filler into ethanol, and ultrasonically dispersing uniformly to obtain dispersion liquid; spraying the dispersion liquid onto the surface of a polyurethane adhesive film to obtain a pretreated polyurethane adhesive film; and carrying out layer-by-layer self-assembly on the surface of the pretreated polyurethane adhesive film for 5-6 times to obtain a finished product. The finished product prepared by the invention has excellent flame retardant property, antibacterial property and mechanical property, thereby having wide application prospect in the technical field of polyurethane materials.

The invention relates to the technical field of adhesives, and discloses a nano-modified polyurethane adhesive, which comprises an isocyanate component, a polyol component, a nano modifier, a chain extender, a catalyst, a solvent, an antioxidant and an antifoaming agent, and is characterized in that the nano-modified polyurethane adhesive comprises the following components in parts by weight: 1-10 parts of a catalyst, 1-10 parts of a solvent, 1-10 parts of an antioxidant and 1-10 parts of a defoaming agent; the raw materials comprise 15-25 parts of an isocyanate component, 40-60 parts of a polyol component, 3-8 parts of a nano modifier, 2-5 parts of a chain extender, 0.1-0.5 part of a catalyst, 10-20 parts of a solvent, 0.2-0.8 part of an antioxidant and 0.1-0.3 part of a defoaming agent; the nano modifier is nano composite particles modified by a silane coupling agent, and the nano composite particles are formed by compounding nano silicon dioxide and nano montmorillonite according to the mass ratio of (2 to 1) to (3 to 1). According to the nano-modified polyurethane adhesive and the preparation method thereof, the nano-modified polyurethane adhesive has the advantages of being high in bonding strength, excellent in heat and humidity resistance, good in high and low temperature stability and uniform in nano particle dispersion, and the problems that a traditional polyurethane adhesive is poor in water resistance and insufficient in high and low temperature performance, and particles are agglomerated and the interfacial compatibility is poor during nano-modification are solved.

The invention relates to a formaldehyde-free environment-friendly polyurethane adhesive and a preparation method thereof, relates to the technical field of high polymer materials, and aims to solve the problems of formaldehyde residue, poor water resistance, high process energy consumption, high cost and the like of the existing formaldehyde-free adhesive. According to the invention, dimethylolpropionic acid and wood metal ions form coordinate bonds to strengthen interface bonding, trimethylolpropane constructs a three-dimensional hydrophobic network, and toluene diisocynate isomers are subjected to fractional reaction to optimize crosslinking uniformity. The content of free formaldehyde in the adhesive is not detected, the adhesive strength retention rate is greatly improved after the adhesive is boiled in boiling water for 72 hours, the hot pressing time is shortened to 8 minutes, and the raw material cost is reduced by 40% or above compared with similar products.

The invention belongs to the field of adhesives, and relates to an acrylate-siloxane modified polyurethane adhesive as well as a preparation method and application thereof. The acrylate-siloxane modified polyurethane adhesive contains a silane modified polyurethane prepolymer, an acrylate compound, a photoinitiator and an optional rheology modifier, wherein the silane modified polyurethane prepolymer, the acrylate compound, the photoinitiator and the optional rheology modifier are used as raw materials; the silane modified polyurethane prepolymer is prepared by the following steps: firstly, carrying out addition polymerization reaction on a polyisocyanate compound and a low-viscosity polyol compound, and then carrying out addition reaction on the obtained polyurethane prepolymer and a silane coupling agent containing reactive hydrogen. The low-viscosity polyol compound has a glass transition temperature of 0 DEG C or less and a melting point of 40 DEG C or less; the functionality of at least a portion of the acrylate compound is bifunctional or less, and the glass transition temperature is 20 DEG C or more. The acrylate-siloxane modified polyurethane adhesive provided by the invention has the characteristics of low viscosity, no bubble and high curing speed.

The invention discloses a modified waterborne polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesives. The carbon dioxide-based polycarbonate polyol is prepared from the following raw materials in parts by mass: 70 to 84 parts of carbon dioxide-based polycarbonate polyol, 8 to 9.6 parts of hexamethylene diisocyanate, 3 to 3.6 parts of isophorone diisocyanate, 0.01 to 0.012 part of dibutyltin dilaurate, 10 to 12 parts of N-methyl pyrrolidone, 3.5 to 4.2 parts of dimethylolpropionic acid, 0.1 to 0.5 part of 1, 3-butanediol, 0.1 to 0.5 part of a catalyst and 0.1 to 0.5 part of a catalyst. The adhesive is prepared from the following components in parts by weight: 1 to 1.2 parts of 1, 4-butanediol, 21 to 25.2 parts of modified polyurethane dispersion, 2 to 2.5 parts of silane-terminated dynamic cross-linking agent, 2.8 to 3.4 parts of triethylamine, 40 to 60 parts of acetone, 200 to 220 parts of deionized water and 10 to 12 parts of ethylenediamine aqueous solution. By introducing the modified polyurethane dispersion and the silane-terminated dynamic cross-linking agent, the base material universality, water resistance and temperature resistance of the adhesive are effectively improved.

The invention relates to the technical field of composite resin coatings, in particular to a water-based composite resin coating and a preparation method thereof. According to the technical scheme, the waterborne polyurethane adhesive comprises the following components in parts by weight: 25-40 parts of waterborne polyurethane dispersion, wherein the waterborne polyurethane dispersion is prepared by reacting isophorone diisocyanate, poly (butylene adipate) glycol, dimethylolpropionic acid, ethylenediamine, polyethylene glycol monomethyl ether, triethylamine and nano cellulose. Through the triple synergistic effect of the nano-cellulose reinforced polyurethane phase, the montmorillonite crosslinked acrylic acid phase, the titanium dioxide and the graphene composite material, the balance of high hardness and high flexibility of the water-based paint is realized, the self-cleaning, antibacterial and corrosion-resistant functions are synchronously achieved, the water-based paint is long-acting and stable, the weather resistance is also remarkably improved to prolong the life cycle of the coating, and the water-based paint has a good application prospect. Excellent performance and environment-friendly value are realized.

The invention discloses a hydrolysis-resistant bio-based polyester polyol modified waterborne polyurethane adhesive, belongs to the technical field of adhesive preparation, and is used for solving the technical problem that the hydrolysis resistance and the adhesive property of a waterborne polyurethane adhesive in the prior art need to be further improved. Furan carbonate-polyester polyol is used as a matrix, phosphorus-silicon cross-linked flame-retardant polyol and a modified curing agent are used as auxiliary materials to construct a multi-layer cross-linked structure, a furan carbonate unit is introduced into a main chain to improve the rigidity and polarity matching of a molecular chain, and an organic-inorganic stable network is formed by using the phosphorus-silicon cross-linked structure; according to the preparation method, the polyurethane is taken as a raw material, and post-crosslinking densification is realized through the modified curing agent, so that chain segment migration and hydrolysis reaction are effectively inhibited, the interface bonding stability and thermal oxidation tolerance are improved, and the prepared polyurethane adhesive has high shear strength, excellent flame retardance and excellent damp-heat aging retention rate and balanced and stable performance at the same time.

The invention discloses a high-stability bio-based polyurethane adhesive for artificial turf and a use method of the high-stability bio-based polyurethane adhesive, and relates to the technical field of polyurethane adhesives. The adhesive comprises the following raw materials in parts by weight: a component A: 20-60 parts of bio-oil polyol, 20-60 parts of polyether polyol, 5-15 parts of a chain extender, 0.1-1 part of an anti-aging agent, 1-5 parts of a dispersing agent, 0.1-1 part of a catalyst, 2-5 parts of color paste and 100-300 parts of filler; the component B is prepared from 30 to 60 parts of isocyanate. According to the polyurethane adhesive, environment-friendly solvent-free raw materials are adopted, and the bio-oil polyol is used as a main material, so that the polyurethane adhesive has reproducibility, environmental friendliness and naturalness; the high-performance dispersing agent is added, so that the stability of the polyurethane adhesive is improved, the viscosity of a system is reduced, the bonding strength of the adhesive is improved, the mixing uniformity of polyurethane is effectively enhanced, the stabilizing time is long, the performance is better, and the polyurethane adhesive can be better applied to artificial turf as an adhesive.

The invention discloses a low-free-monomer waterborne polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesive preparation, the low-free-monomer waterborne polyurethane adhesive comprises a main chain structure composition, a functional additive, a reaction control and optimization additive and an auxiliary reagent, the main chain structure composition comprises low-monomer residual diisocyanate and polymer polyol, and the functional additive comprises a low-free-monomer residual diisocyanate and a low-free-monomer residual diisocyanate; by introducing a flexible chain segment and optimizing an emulsification process, an adhesive film has better hydrophobicity and a microcosmic phase separation structure, the water soaking resistance is greatly improved, the adhesive film has outstanding water resistance, a unique formula design ensures that an adhesive layer cannot be subjected to strength attenuation due to aging in a long-term use process, the bonding durability is excellent, and the adhesive film has a good application prospect. The preparation method has the advantages of reasonable process design, mild and controllable reaction conditions, good process applicability and good storage stability, and through stabilization treatment, the obtained emulsion has the advantages of uniform particle size, good mechanical stability and storage stability, and long shelf life.

The invention relates to the technical field of high polymer materials, and discloses a furyl polyurethane adhesive and a synthesis method thereof, polymer polyol is used as a soft segment, isocyanate and two specific furyl chain extenders are used as hard segments, polymerization is performed through a one-step method, and the method has the advantages of simple process, short flow, mild reaction conditions and the like. Wherein a furan ring and an amide group of the two specific furyl chain extenders endow the material with rigidity and excellent bonding performance, and form a high-density hydrogen bond network with a hydrazide group, so that the mechanical strength, the toughness and the bonding performance of the material are remarkably improved. By regulating and controlling the proportion of the components, the rigidity and flexibility of the material can be effectively balanced, so that the polyurethane adhesive with excellent comprehensive performance is prepared. The furyl polyurethane adhesive prepared by the invention has relatively high adhesion strength and mechanical strength, and can be applied to the fields of buildings, automobile manufacturing, medical treatment, packaging, aerospace, electronics and the like.

The invention discloses a preparation process of coating slurry for a lithium ion battery diaphragm. Comprising the following steps: step 1, uniformly mixing polyether polyol, a modified additive, dibutyltin dilaurate, dimethylolpropionic acid and isophorone diisocyanate, under a protective atmosphere, raising the temperature to 80-90 DEG C, reacting for 3-4 hours, then adding 1, 4-butanediol, continuously reacting for 3-4 hours, after the reaction is finished, cooling to 40-50 DEG C, then adding triethylamine, stirring for 30-40 minutes, and then, carrying out heat preservation for 30-40 minutes, so as to obtain a polyurethane prepolymer; slowly adding deionized water to obtain a polyurethane adhesive; 2, inorganic particles, a polyurethane adhesive and a dispersing agent are mixed and stirred at the normal temperature for 10-12 h, and the coating slurry is obtained. The flame-retardant battery diaphragm has the beneficial effects that the flame-retardant unit and the modified additive of the quaternary ammonium salt group are introduced into a polyurethane adhesive system, so that the prepared battery diaphragm has excellent flame retardance, enhanced mechanical property and good electrolyte wettability.

This invention relates to a high lightfast polyurethane composite material, comprising, from top to bottom, a polyurethane top layer, a polyurethane intermediate layer, a solvent-free polyurethane adhesive layer, and a base fabric layer. The solvent-free polyurethane adhesive layer is prepared from a solvent-free polyurethane adhesive layer slurry, which is a mixture of polyether-type polyol component A and isocyanate prepolymer component B. The polyether-type polyol component A is prepared from the following components in parts by weight: 100 parts polyether-type polyol, 20-80 parts filler, 0.38-0.48 parts composite catalyst, and 0.5-1 parts anti-yellowing agent. The composite catalyst is formed by combining organometallic catalysts and amine catalysts. The solvent-free polyurethane adhesive layer of this invention's high lightfast polyurethane composite material exhibits good adhesion, achieving excellent bonding with the base fabric and forming a good lightfast and heat-resistant system in each layer, resulting in a composite material with excellent lightfastness and heat-resistant color-changing properties.

The invention discloses a paper-plastic composite reactive polyurethane hot melt adhesive for low-temperature coating, and belongs to the technical field of polyurethane adhesives, the paper-plastic composite reactive polyurethane hot melt adhesive for low-temperature coating comprises the following components by weight: 50-70 parts of modified polyester polyol, 30-50 parts of modified polyether polyol, 15-24 parts of diisocyanate, and 5-30 parts of tackifying resin, 0.1-1 part of a catalyst, 5-35 parts of a filler, 0.05-2 parts of a polymerization inhibitor and 0.1-0.5 part of an antioxidant; the modified polyester polyol is modified poly (butylene succinate); the modified polyether polyol is modified polypropylene glycol; the polyurethane hot melt adhesive prepared by modifying 5-norbornene-2-methylamine with a strong polar bond-NH and 3, 7-dimethyl octyl-6-ene-1-alcohol containing an insect-proof and mildew-proof functional component with polyhydric alcohol has relatively low melting temperature and viscosity, has initial viscous force of more than 1N and final viscous force of more than 5N at the same time, and has the characteristics of high temperature resistance, high temperature resistance, high temperature resistance and the like. The method can be well applied to paper-plastic compounding for low-temperature coating.

The utility model relates to the technical field of automobile manufacturing tools, and discloses a polyurethane glue in-mold secondary pressing tool which comprises a robot quick-change disc assembly, a glue coating pipe, an upper module, a lower module and a buckling and pressing assembly used for fixing the upper module and the lower module. The robot quick-change disc assembly is used for carrying the upper module; and the gluing pipe is used for respectively smearing polyurethane glue at the polyurethane glue position A on the upper outer plate of the product and the polyurethane glue position B on the middle lower outer plate of the product. By optimizing the structure of the pressing tool, one-time feeding, one-time gluing and step-by-step multi-time pressing of a product are achieved in the pressing tool, and the technological process is shortened; the butt joint transfer production takt is shortened to about 60 seconds from the traditional about 140 seconds, so that the auxiliary time is greatly shortened, and the production efficiency is improved; on the other hand, the fixed investment cost is saved by about 300,000 compared with that of a traditional scheme, and meanwhile the product percent of pass is increased.

The application belongs to the technical field of polymer material adhesive, and particularly discloses a polyurethane adhesive and a preparation method thereof. The polyurethane adhesive is in the form of emulsion, the emulsion particles in the polyurethane adhesive have polyurethane long chains capped by dopamine and containing epoxy group side chains, and the polyurethane long chains have a core-shell structure with hydrophilic groups facing outward and hydrophobic groups facing inward. The above structure enables the polyurethane adhesive to fully exert the biomimetic mussel adhesion effect of dopamine and achieve strong bonding at various interfaces. The emulsion particles can not only effectively improve the stability of the emulsion, but also enable the adhesion groups of dopamine to be enriched on the surface of the emulsion particles, thereby significantly improving the adhesion effect. When the polyurethane adhesive is applied for curing, the end groups of dopamine can be coordinated and crosslinked with mild metal ions, thereby exerting bonding strength, and the dopamine capping can completely eliminate the -NCO groups in the traditional polyurethane adhesive, thereby overcoming the disadvantage of insufficient strength.

The utility model discloses polyurethane adhesive quantitative filling equipment, which comprises a support frame body, a material storage tank, a weighing platform and a weighing sensor, the material storage tank is arranged in the support frame body, the weighing platform is arranged in the support frame body, the weighing sensor is arranged at the bottom of the weighing platform, the top of the weighing platform is provided with a placing seat, and the placing seat is arranged on the support frame body. According to the polyurethane adhesive filling device, by arranging a supporting block, an extension plate, an L-shaped block, a first material receiving box, a second material receiving box and the filling cylinder, a polyurethane adhesive is filled into the filling cylinder through a material storage tank, an elastic body part of a weighing sensor deforms, and a strain gauge generates resistance change along with deformation of an elastic body; and under the connection of the L-shaped block, the first material receiving box and the second material receiving box are driven to move downwards at the same time, so that the two sides of the filling cylinder can be clamped, and through the structure, the two sides of the filling cylinder can be clamped, and overflowing polyurethane adhesive can be collected.

The invention provides a female nursing protection product packaging bag production device which comprises a rack and a control system. A multi-layer co-extrusion film blowing machine used for extruding multi-layer or multi-color film materials, a pretreatment assembly used for primary treatment of base materials and a high-speed intaglio printing assembly used for printing different colors on the base materials are sequentially arranged on the support in an integrated mode along the technological process. The compounding module is used for performing dry compounding on an upper film and a lower film through a double-component polyurethane adhesive; the die cutting and collecting assembly is used for accurately cutting and forming a packaging material; the composite module comprises an easy-to-tear opening laser die cutting unit and a lifting tongue online attaching unit and is adjusted and controlled through a control system. According to the production device for the female nursing protection product packaging bag, key procedures can be integrated, high-speed and high-precision production is achieved, and sanitation of the female nursing protection product packaging bag is guaranteed.

The invention discloses a modified polyurethane adhesive, and relates to the technical field of high polymer materials. The invention relates to a modified polyurethane adhesive which is prepared from the following raw materials in parts by weight through reaction: 70-90 parts of polyether polyol, 8-12 parts of an isocyanate compound, 5-10 parts of an organic silicon modifier, 2-5 parts of a weather-resistant stabilizer, 4-7 parts of nano filler, 3-8 parts of a chain extender and 1-4 parts of a catalyst. By introducing the weather-resistant stabilizer with a specific structure, the damage of ultraviolet light and free radicals to a polyurethane molecular chain is effectively blocked, so that the weather resistance and the aging resistance of the adhesive are remarkably improved, and the service life of the adhesive is prolonged.

The invention discloses a two-component polyurethane adhesive as well as a preparation method and application thereof, and the adhesive comprises a component A and a component B in parts by weight, the component A is prepared from 15 to 30 parts of hydroxyl-terminated polybutadiene, 20 to 40 parts of polyester polyol, 5 to 15 parts of epoxy modified polyether polyol, 1 to 5 parts of phosphate ester, 1 to 5 parts of micromolecular dihydric alcohol chain extender, 2 to 10 parts of silane coupling agent, 1 to 5 parts of thixotropic agent, 20 to 50 parts of filler, 5 to 15 parts of flame retardant and 0.1 to 0.5 part of catalyst; the component B is prepared from the following components in parts by weight: 60 to 80 parts of polyisocyanate and 20 to 40 parts of polyurethane prepolymer. The bi-component polyurethane adhesive is used for bonding SMC or metal, has high strength and high elasticity, balances the thermal expansion coefficient difference between the SMC and the metal, and can realize reliable bonding of the SMC without complex surface treatment.

The application discloses a single-component water-based polyurethane adhesive and a preparation method thereof. The single-component water-based polyurethane adhesive comprises the following components in parts by weight: 20-100 parts of a water-based polyurethane dispersion, 20-100 parts of a water-based VAE emulsion, 0.1-0.5 parts of a thickening agent, 0.1-0.5 parts of a wetting agent, and 0.01-0.05 parts of a defoaming agent. The single-component water-based polyurethane adhesive has the characteristics of excellent initial adhesion, low activation temperature, excellent heat resistance, aging resistance and wet heat resistance, and can be single-component brush coated, is very suitable for a manual coating process of an automobile interior steering wheel and other interior parts, and can greatly improve production efficiency and save cost.