15results about How to "Improve initial tack performance" patented technology

The high-temperature-resistant and high-humidity-resistant acrylic foam tape comprises a release layer, a first acrylic pressure-sensitive adhesive layer, an acrylic foam layer and a second acrylic pressure-sensitive adhesive layer which are arranged in sequence, wherein the acrylic foam layer comprises the following components in parts by mass: 80-100 parts of a first acrylic prepolymer; 5 to 10 parts of a first functional monomer; 0.1 part to 0.4 part of a second functional monomer; 3 to 6 parts of hollow glass beads; 1 to 2 parts of fumed silica; 0.05 part to 0.2 part of a first photoinitiator; 0.05 to 0.2 part of a second photoinitiator; 0.1 part to 0.5 part of color paste; and 0.1 to 0.5 part of a first silane coupling agent. According to the high-temperature-resistant and high-humidity-resistant acrylic foam adhesive tape, the peeling strength can be improved, and the high temperature resistance and the humidity resistance of the acrylic foam layer can be enhanced.

The present invention belongs to the technical field of protective films, and relates to an explosion-proof film and a preparation method thereof, comprising a PET base film, a release film, and an adhesive layer for bonding the PET base film and the release film, wherein the adhesive layer is solidified by an adhesive, and the adhesive comprises the following substances in parts by weight: acrylate copolymer: 50 parts to 70 parts, solvent: 20 parts to 45 parts, tackifying resin: 2.5 parts to 4 parts, coupling agent: 0.5 parts to 2 parts, curing agent: 1.5 parts to 3 parts, catalyst: 0.5 parts to 1 part, and the molecular weight of the acrylate copolymer is between 1 million and 2 million. It can effectively solve the problem of low peeling of the explosion-proof film, especially the obvious reduction of peeling force and degumming in long-term use under high temperature and high humidity environment.

The invention discloses a household appliance cover plate bonding reaction type polyurethane hot melt adhesive and a preparation method thereof, and belongs to the field of polyurethane hot melt adhesives, the polyurethane hot melt adhesive is prepared from the following raw materials by weight: 5-25 parts of thermoplastic acrylic resin, 10-60 parts of aliphatic polyester polyol, 8-20 parts of polyether glycol, 10-30 parts of isocyanate, 15-40 parts of a filler, 0.01-0.1 part of a stabilizer and 0.05-0.5 part of a catalyst; the content of NCO in the adhesive reaction type polyurethane hot melt adhesive for the household appliance cover plate is 1.0%-3.5%. The adhesive has the advantages of being short in opening time and high in adhesive strength, the production efficiency is improved, and the use requirement for adhesion of household appliance cover plates can be met.

This invention discloses a food-grade alkali-free modified starch adhesive for corrugated paper lamination and its preparation method, belonging to the field of adhesive technology. The modified starch adhesive comprises, by weight, 150-250 parts starch, 250-350 parts water, 4-10 parts hydrogen peroxide, 1-5 parts defoamer, 5-10 parts preservative, and 150-200 parts modified ethylene-vinyl acetate copolymer emulsion; wherein the modified ethylene-vinyl acetate copolymer emulsion is prepared by blending cellulose aqueous solution, PVA, filler, and ethylene-vinyl acetate emulsion in a specific ratio. This invention does not use caustic soda or borax throughout the process; all raw materials are food-grade, and the finished product is weakly alkaline, meeting the requirements of GB4806.15-2024. Through synergistic oxidation modification and emulsion compounding, it significantly improves initial tack, bonding strength, and drying speed, resulting in a low scrap rate, good resistance to damp heat and freeze-thaw cycles, and is suitable for high-speed, room-temperature lamination production of food-grade and ordinary corrugated paper.

The invention relates to a preparation method of a high-speed mouthpiece adhesive for PET (polyethylene terephthalate) tipping paper, which is mainly prepared by adding EVA (ethylene-vinyl acetate) emulsion, polyvinyl alcohol, a plasticizer, a wetting agent, a defoaming agent, a pH (potential of hydrogen) regulator, a bactericide and the like into prefabricated acrylic emulsion. The preparation method is characterized in that the prefabricated acrylic emulsion has a high solid content of 65-70%, and is prepared by suspension polymerization of a soft-segment acrylate monomer, a hard-segment acrylate monomer, a crosslinking monomer, abietate and a reactive emulsifier with carbon-carbon double bonds; the mass ratio of the prefabricated acrylic emulsion to the EVA emulsion to the polyvinyl alcohol to the plasticizer to the wetting agent to the defoaming agent to the pH value regulator to the bactericide is (20-30) to (55-65) to (5-10) to (3-5) to (0.1-0.5) to (0.1-0.5) to (0.1-0.5) to 0.1. The high-speed mouthpiece adhesive for the PET tipping paper can meet the requirements of the high-speed mouthpiece adhesive for the PET tipping paper on the bonding force, the cohesive strength and the bonding stability.

The invention relates to a preparation and detection method of a modified polyisocyanate adhesive with a long storage period. The preparation method comprises the following steps: S1, discoloring the polyisocyanate adhesive; s2, preparing a modifier; and S3, preparing the modified polyisocyanate adhesive. According to the invention, the modifier is added into the discolored polyisocyanate adhesive, so that the viscosity of the product is improved by 2.3-16.6 times, the saturated water absorption rate is reduced by 1.5-8.3%, and the acid value is reduced by 13-60%. According to the present invention, the original yellow and green color of the modified polyisocyanate adhesive is changed into the red purple color by using the illumination method, and the storage period of the modified polyisocyanate adhesive is prolonged through the color changing treatment and the addition of the modifier, such that the storage period of the modified product can still achieve 18 months so as to conform to the shelf life of the polyisocyanate adhesive product. The method is simple, convenient, efficient, low in cost and high in efficiency. The invention further provides a detection method which is more scientific, more visual and closer to reality and reflects performance and quality indexes of polyisocyanate adhesive.

This invention discloses a PVA water-soluble adhesive tape and its preparation method, relating to the field of environmentally friendly polymer materials technology, and belonging to patent classification number C09J103 / 04. The method includes the following steps: mixing oxidized starch with deionized water, adding polyamide polyamine epichlorohydrin resin, and heating to carry out an ionic crosslinking reaction to obtain ionicly crosslinked starch; cooling the ionicly crosslinked starch, then adding carboxybetaine methacrylate and ammonium persulfate, and heating to carry out a free radical grafting reaction to obtain modified starch; adding polyvinyl alcohol aqueous solution and borax decahydrate to the modified starch to carry out a borate ester crosslinking reaction to obtain a water-soluble starch-based adhesive; preparing a PVA film substrate using a blown film process, uniformly coating the water-soluble starch-based adhesive onto the PVA film substrate using a precision coating machine, and then curling and slitting to obtain the PVA water-soluble adhesive tape. The PVA water-soluble adhesive tape prepared by this invention not only has good water solubility but also excellent adhesive properties.

The invention relates to the technical field of preparation of a sizing material for adhesive paper from an edible material, in particular to a process for preparing the sizing material for the adhesive paper from the edible material, which comprises the following steps of: preparing, injecting carrier water, putting carrier powder, adding caustic soda liquor, adding main body water, adding a modifier, gelatinizing and mixing. In the process, a paste supply mechanism and a pit supply mechanism are respectively adopted for production, raw materials are fully and uniformly mixed, starch-containing carrier powder is modified under the action of caustic soda liquor through a modifier and borax with specific raw material dosage, and the carrier powder is composed of one or more of corn starch, flour and glutinous rice flour. The modifier comprises an anhydride compound, and a production process is combined, so that the sizing material is applied to batch production of the adhesive, better production quality can be ensured, the phenomena of falling, residual adhesive, damage to the surface of an adhered object and the like in the use process are reduced, and the practicability of the adhesive is improved.

The invention discloses a self-adhesion type SBS modified asphalt waterproof coiled material, and relates to the technical field of waterproof coiled materials, the self-adhesion type SBS modified asphalt waterproof coiled material provided by the invention adopts a gradient tire base design, the tensile strength, the tearing strength and the ductility are improved, and the problem of insufficient mechanical properties of a traditional tire base is solved; due to the introduction of the block copolymer interface layer, the interlayer bonding force is remarkably enhanced, the base and the asphalt coating are firmly combined through the chemical bonding effect, the interlayer bonding force is remarkably enhanced, and layering is effectively prevented; the anti-ultraviolet coating and the antibacterial coating delay aging and inhibit mold growth, and the environmental adaptability is improved; the optimized low-modulus asphalt coating enhances the initial adhesion performance at low temperature, meets the requirement of low-temperature construction, and has better durability, stability and construction adaptability.

The invention relates to the technical field of surface protection films, and particularly discloses a graphene protection film and a preparation method thereof. The graphene protective film comprises a PET (Polyethylene Terephthalate) film, toughened glass and a release film are respectively adhered to two side surfaces of the PET film; the PET film and the toughened glass as well as the PET film and the release film are adhered through an adhesive; the adhesive comprises the following components: a mixed emulsifier, acrylic acid, hydroxyethyl acrylate, glycidyl methacrylate, 2-(trifluoromethyl) tert-butyl acrylate, modified acrylate and deionized water. The graphene protective film prepared by the invention has the advantages of good cohesiveness, easiness in stripping, no adhesive residue, good exhaust performance, easiness in adhesion, no snowflake phenomenon, high light transmittance and low haze.

The invention discloses a carbon-based reinforced heat-conducting high-viscosity shaped phase-change material as well as a preparation method and application thereof. The carbon-based reinforced heat-conducting high-viscosity shaped phase-change material comprises the following components in parts by weight: 20-60 parts of a basic phase-change material, 1-30 parts of a polymeric elastomer, 1-25 parts of a tackifying material, 0.1-0.2 part of an antioxidant, 1-3 parts of a coupling agent and 5-30 parts of carbon-based heat-conducting particles. The carbon-based filler reinforced heat-conducting high-viscosity shaped phase change material prepared by the invention has the advantages of high initial viscosity, flexibility, heat resistance, shape stability, low filling amount and the like, overcomes the defect that the characteristics of the current phase change material cannot be combined, and can be applied to heat-conducting interface materials of electronic components, such as heat dissipation of a CPU (Central Processing Unit), a GPU (Graphic Processing Unit) and the like, heat management of a battery and the like. Flexible wearable equipment thermal management and the like.

The invention provides a pressure-sensitive adhesive composition containing a carboxylic acid tackifier and a preparation method of the pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition comprises an adhesive matrix, a liquid tackifier and a cross-linking agent, the liquid tackifier comprises a carboxylic acid tackifier, and the carboxylic acid tackifier is selected from at least one of C10-C25 unsaturated carboxylic acid and oligomeric acid of the C10-C25 unsaturated carboxylic acid. According to the pressure-sensitive adhesive composition containing the carboxylic acid tackifier, the initial adhesion performance, the impact resistance and the adhesion performance to low-polarity plates are remarkably improved.

The present invention belongs to the technical field of particleboard preparation, and provides a low-density formaldehyde-free particleboard and a preparation process thereof. The preparation process comprises the following steps: preparation of lignin-based liquid polyester polyol; modulation of sizing solution; shavings sizing and paving; pressing and molding. Among them, the lignin-based liquid polyester polyol is prepared by using lignin, chloroacetic acid, mixed small molecule diols and methyl allyl alcohol; the sizing solution utilizes lignin-based liquid polyester polyol instead of polyols from petroleum sources, adds G-15 liquid tackifying resin, vinyl tris (β-methoxyethoxy) silane, foaming agent, catalyst and isocyanate, foams and reacts during pre-pressing and pressurizing, produces a strong bonding effect, and prepares a particleboard with excellent performance and no formaldehyde. The present invention obtains a formaldehyde-free lightweight particleboard with good mechanical properties, and the preparation process is free of organic solvents and is very environmentally friendly.

The invention relates to a composition and a preparation method thereof. The composition is prepared from the following raw materials: butyl rubber, a polyisobutene composition, a thermoplastic elastomer, a reinforcing material, an inorganic filler, a barrier filler, a coupling agent, a light stabilizer and an antioxidant, wherein the thermoplastic elastomer is selected from one or a combination of more of SEBS, SEPS, EVOH and POE; the barrier filler is selected from reduced iron powder and / or molecular sieves. The sealant provided by the invention is excellent in weather resistance and water-oxygen barrier property, simple and safe in preparation process and suitable for industrialization.

This invention discloses a low-temperature activated adhesive and its preparation method, belonging to the field of adhesive technology. The adhesive, by weight, mainly comprises 8-10 parts of polycarbonate polyol with a number-average molecular weight of 3000, 1-3 parts of polycarbonate polyol with a number-average molecular weight of 2000, and 5-7 parts of bio-based PTMEG with a carbon content of 60-70%, combined with a chain extender, a compound isocyanate, a catalyst, a terminator, n-butyl polymethacrylate, and an environmentally friendly solvent. This invention, through the synergistic regulation of the polyol compound system, specific bio-based PTMEG modification, and tackifying components, enables the adhesive to achieve an activation temperature as low as 38℃, and complete activation below 50℃. It also exhibits excellent initial tack, peel strength, and heat aging resistance, perfectly meeting the bonding requirements of heat-sensitive footwear materials. The preparation process is mild and controllable, environmentally friendly, and easy for industrial-scale production.