19results about How to "High tear strength" patented technology

The utility model discloses a sheet metal part drilling fine adjustment mechanism relates to sheet metal part drilling field, the utility model discloses a first electric sliding table, and the output of first electric sliding table is equipped with the first sliding seat, and the top of first sliding seat is installed with second electric sliding table, and the output of second electric sliding table is equipped with the second sliding seat. The utility model discloses through being provided with the shielding cloth, first bolt, second bolt, first side plate and second side plate, the top of first electric sliding table and second electric sliding table can be shielded by the shielding cloth, prevent the direct drop of debris to the top of first electric sliding table and second electric sliding table, thereby prevent the hard debris (such as metal scrap) and cause the sliding seat to be stuck in the clearance between electric sliding table and sliding seat and affect the movement of sliding seat, to ensure that the sliding seat can move smoothly, prevent the sliding seat to push the debris movement simultaneously and make the debris and the top of electric sliding table rub and scratch the top surface of electric sliding table, thereby prolong the service life of electric sliding table.

This invention relates to the field of nitrile butadiene rubber (NBR) technology, and discloses a biodegradable NBR, its preparation method, and its application in gloves. The biodegradable NBR of this invention comprises 60-80 parts by weight of NBR, 3-6 parts by weight of filler, 1.2-1.8 parts by weight of vulcanizing agent, 20-40 parts by weight of polylactic acid (PLA), and 5-12 parts by weight of cyanopolyester. The cyanopolyester of this invention improves the compatibility between PLA and NBR, resulting in a thermoplastic PLA-NBR composite material with higher tensile strength and tear strength, exhibiting excellent mechanical properties. The cyanopolyester's main chain contains a large number of biodegradable ester groups, and the addition of biodegradable PLA further enhances the biodegradability of the NBR material, making it more environmentally friendly and suitable for practical applications in biodegradable gloves.

This invention discloses a waterproof and anti-corrosion waterstop for construction joints and its preparation method, relating to the field of engineering waterstop technology. This invention improves upon traditional waterstops by preventing them from gradually hardening, becoming brittle, or losing their elastic recovery ability during long-term use, thus ensuring that the material maintains high tear strength and elongation at break even after aging, overcoming the shortcomings of insufficient anti-aging synergy in traditional technologies.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

This invention relates to the field of interior decoration materials, specifically to a paper-based tear-resistant substrate and its preparation method. A method for preparing a paper-textured tear-resistant substrate includes the following steps: S1: preparing a paper-textured slurry; S2: applying the paper-textured slurry to the surface of a non-woven fabric substrate in multiple steps; S3: heating and shaping with a pressure roller, and cooling to obtain a composite substrate; the paper-textured slurry, by weight, includes: 20-30 parts of water-based acrylic resin emulsion, 10-15 parts of water-based polyurethane emulsion, 1-8 parts of modified starch adhesive, 15-25 parts of kaolin, 10-15 parts of heavy calcium carbonate, 5-10 parts of titanium dioxide, 3-5 parts of shell powder, 0.5-2 parts of nanocellulose, 0.5-1 part of dispersant, 0.1-0.5 parts of polyether-modified organosilicon, and water, wherein the amount of water added makes the solid content of the paper-textured slurry 35-50%; the obtained substrate has a paper-textured feel, which facilitates ink adhesion and high-precision printing, and has good tear resistance.

This invention discloses a white, smooth-surface rubber extrusion tube and its preparation method. Using EPDM rubber as the matrix, activators, softeners, reinforcing fillers, modified phenolic resin, lubricants, white pigments, coupling agents, and vulcanization accelerators are added. These materials are mixed in a rubber mixing mill to form a mixed elastomer, which is then extruded into a pre-formed rubber tube in an extruder. The tube is then vulcanized in a vulcanizing tank to become the final product. Extruded rubber products (except silicone) are generally black, mainly because carbon black has good compatibility with rubber, which is beneficial for extrusion. Light-colored or white extruded rubber products often have poor compatibility with the fillers, resulting in rough surfaces or incomplete extrusion. This invention solves the problem of rough surfaces or incomplete pre-forming in light-colored or white rubber extrusion products, meeting different customer needs and enriching the diversity and choice of product colors.

This invention provides an environmentally friendly rubber additive based on corn cobs, its preparation method, and its application, belonging to the field of rubber additive technology. The preparation method of this invention uses corn cobs as the sole core raw material. Corn cob powder is treated with an acidic solution to obtain filter residue A; filter residue A is treated with an alkaline solution to obtain lignin solution and cellulose; cellulose is enzymatically hydrolyzed to obtain glucose; glucose undergoes isomerization and dehydration reactions to obtain 5-hydroxymethylfurfural; the lignin solution is acid-precipitated and then subjected to amination or phenolation modification to obtain modified lignin; 5-hydroxymethylfurfural and modified lignin undergo a condensation reaction under the action of an acidic catalyst to obtain the environmentally friendly rubber additive. The preparation method of this invention achieves full resource utilization, producing a rubber additive with good environmental performance, high reactivity, and excellent adhesive properties, reducing dependence on petrochemical raw materials and reducing environmental pollutant emissions.

This invention discloses a biomass-based energy-absorbing buffer panel, its preparation method, and its application. The biomass-based energy-absorbing buffer panel comprises an energy-absorbing layer, carbon fiber reinforcement layers located on both sides of the energy-absorbing layer, and an adhesive layer between the energy-absorbing layer and the carbon fiber reinforcement layers; the energy-absorbing layer contains biomass polyurethane, and the carbon fiber reinforcement layers contain carbon fibers and furan-based polyester. This biomass-based energy-absorbing buffer panel exhibits excellent cushioning effect and mechanical properties, and is environmentally friendly.

This invention belongs to the technical field of graphene and functional rubber composites, specifically a simplified preparation process for high tear strength graphene-modified natural rubber based on an interpenetrating double crosslinked network structure constructed with two vulcanizing agents. This invention uses two vulcanizing agents: sulfur and peroxide. Sulfur rapidly forms a high-density carbon-sulfur crosslinked network (-C-Sx-C-) in the natural rubber composite, constituting the mechanical load-bearing skeleton between the natural rubber main chains, imparting high tear strength and fatigue resistance. Peroxide has a relatively slow vulcanization rate, and it slowly decomposes at lower temperatures to generate free radicals, constructing a stable -C-C- secondary crosslinked network between the terminal segments of the carbon-sulfur main network outside the sulfur vulcanization skeleton network. This improves the three-dimensional structural integrity of the vulcanization network, reduces the loss modulus of the rubber, and thus reduces heat generation during dynamic compression. This invention effectively improves the tear strength of natural rubber vulcanizates through the synergistic effect of nanofiller reinforcement and the interpenetrating double crosslinked network structure.

This invention relates to a tear-resistant nylon and its preparation method, belonging to the field of polymer materials technology. The tear-resistant nylon comprises, by weight, 65-80 parts nylon resin, 6-15 parts modified carbon fiber, 1-3 parts compatibilizer, 0.3-0.5 parts lubricant, 0.15-0.25 parts antioxidant, and 4-10 parts toughening agent. This invention uses a silane coupling agent KH550 to modify the carbon fiber. On the one hand, this increases the compatibility between the carbon fiber and the nylon resin; on the other hand, the organic functional groups in the silane coupling agent KH550 can react with the amino and carboxyl groups in the nylon resin, physically entangle with the nylon molecular chains, and enhance the bonding force, thus increasing the tear resistance of the nylon resin. This invention uses carbon fibers with a length of 8-10 mm. The carbon fibers interweave in the nylon resin to build a three-dimensional network structure as a skeleton, dispersing stress and increasing the tear resistance of the nylon resin. Simultaneously, the longer carbon fibers can also intertwine, further increasing the tear resistance of the nylon.

This invention relates to the field of polyurea technology and discloses an antistatic waterborne polyurea coating and its preparation method, comprising component A (100 parts by weight of terminal isocyanate prepolymer); component B (6.8-13.7 parts by weight of diamine chain extender, 42-60 parts by weight of polyvinylpyrrolidone copolymer, and 1-4 parts by weight of PVP-modified carbon nanotubes). After modification with PVP dispersant, the carbon nanotubes exhibit better dispersibility in the waterborne polyurea coating, forming a uniform conductive and thermally conductive network, thus improving antistatic and thermal conductivity, while also enhancing the mechanical properties of the polyurea. The polyvinylpyrrolidone copolymer contains hydrophilic carboxyl and amino groups, exhibiting excellent dispersibility in the waterborne polyurea coating. Furthermore, the amino groups can react with the isocyanate groups of the terminal isocyanate prepolymer, thereby forming a three-dimensional chemical crosslinking effect, which synergistically enhances the tensile and tear strength of the polyurea coating.

This invention belongs to the technical field of agricultural greenhouse film materials, specifically relating to a polyvinylidene fluoride (PVDF) greenhouse film and its preparation method. The resin raw material for film formation is a compound of copolymer PVDF resin I and copolymer PVDF resin II; wherein the copolymer PVDF resin I accounts for 10-30% by weight, and the copolymer PVDF resin II accounts for 70-90% by weight. The preparation of this PVDF greenhouse film involves compounding two different copolymer PVDF resins in a certain proportion as film-forming resin raw materials to obtain a single PVDF greenhouse film. The resulting greenhouse film is isotropic, with right-angle tear strength ≥250KN / m in both the MD and TD directions, significantly improving tear strength and processing performance, making it suitable for high-end facility agriculture.

This invention belongs to the field of tire technology and discloses a sidewall waterproofing line structure suitable for engineering machinery tires, including the tire sidewall and at least one circumferential non-sharp angled protrusion located near the tire bead. This invention uses geometric methods to locate the lower cutting point, placing the waterproofing line in the optimal water-blocking position, solving the problems of inaccurate positioning and unstable effects of traditional methods. The number, spacing, and size parameters of the angled protrusions are optimized to balance protective performance and rolling resistance, preventing mud entanglement and scratches. Precise curvature matching and arc transition eliminate stress concentration, reducing the risk of cracking. The transition area uses 5%-8% carbonized silicone material, increasing tear strength by approximately 25% and significantly enhancing durability, specifically addressing the potential cracking risk in this heavy-load stress concentration area. The open shoulder design, working in conjunction with the waterproofing line, drains water and mud, greatly improving traction and anti-skid capabilities in muddy conditions, making it more suitable for harsh working environments such as mines and construction sites.

The utility model discloses a curtain type safety air bag bag with high inflation reliability. The curtain type safety air bag bag with high inflation reliability comprises an upper air bag piece and a lower air bag piece, the upper air bag piece and the lower air bag piece are stitched to form an air bag cavity, and the air bag cavity is provided with an inflation port. The curtain type safety air bag bag comprises a gas guide reinforcing piece arranged at the inflation port, the gas guide reinforcing piece comprises two first reinforcing pieces and two second reinforcing pieces, the two first reinforcing pieces and the two second reinforcing pieces are located between the upper air bag piece and the lower air bag piece, and the two second reinforcing pieces are located outside the two first reinforcing pieces. The first reinforcing piece has an overlapping part overlapping with the second reinforcing piece and a gas nozzle part extending beyond the second reinforcing piece, the two first reinforcing pieces and the two second reinforcing pieces are stitched at the partial edges of the overlapping part and are provided with gas distribution ports, and the two first reinforcing pieces are respectively stitched with the upper air bag piece and the lower air bag piece at the edges of the gas nozzle part.

This invention discloses a chemically resistant insulating paper, relating to the field of insulating materials technology. The chemically resistant insulating paper includes an outer layer, with an inner intermediate layer; the intermediate layer is bonded to the inner layer. This invention, combining a multi-layered composite structure with a unique fiber interweaving and porous structure, effectively blocks the penetration of chemical substances. The outer PTFE coating provides the first line of protection, the dense structure and chemically stable materials of the intermediate layer further block the penetration, and the modified fibers of the inner layer also possess a certain degree of corrosion resistance. Testing showed that after immersion in a 10% hydrochloric acid solution for 1000 hours, the insulating paper's performance did not significantly decrease. Each layer of material itself possesses excellent insulation properties, and the structural design optimizes the internal electric field distribution. The aramid fiber and nano-silica composite structure of the intermediate layer, and the modified cellulose and PPS fiber interweaving structure of the inner layer, reduce electron migration paths and improve insulation resistance, reaching over 10^15 Ω·cm.

The invention provides copolymerized polyamide-imide, a film, a preparation method and an electronic device, and belongs to the field of flexible display materials. The copolymerized polyamide-imide is at least prepared from a reaction system containing the following monomers: a) a fluorine-containing aromatic dianhydride monomer; b) an aromatic diamine monomer containing ether bonds and fluorine; and c) an aromatic diacyl chloride monomer. The copolymerized polyamide-imide disclosed by the invention is prepared by carrying out polycondensation and chemical imidization on a dianhydride component, a diamine component and an acyl chloride component in a polar solvent; a rigid benzene ring structure and a hydrogen bond in a main chain can improve the modulus to be larger than or equal to 6 Gpa, the size stability is high, the thermal expansion coefficient is smaller than or equal to 10 ppm / DEG C, meanwhile, a large-steric-hindrance side group of a benzene ring on the main chain can effectively improve the optical performance of the thin film, light transmittance is prevented from being affected by low-temperature dropwise adding and step-by-step imidization (the light transmittance of the waveband of 360-780 nm is larger than or equal to 88%), the benzene ring structure containing an ether bond on the main chain, and the light transmittance of the thin film is larger than or equal to 80%. The tearing strength of the membrane material can be effectively improved.

This invention relates to the field of automotive interior technology, specifically disclosing an environmentally friendly, high-strength automotive headliner. From bottom to top, it comprises: a non-woven fabric layer, a first adhesive layer cast on the surface of the non-woven fabric layer, a first toughening fiber felt bonded to the surface of the first adhesive layer, a second adhesive layer cast on the surface of the first toughening fiber felt, a polyurethane substrate bonded to the surface of the second adhesive layer, a third adhesive layer cast on the surface of the polyurethane substrate, a second toughening fiber felt bonded to the surface of the third adhesive layer, and a fourth adhesive layer cast on the surface of the second toughening fiber felt. Both the first and second toughening fiber felts are made of toughening fibers. The first, second, third, and fourth adhesive layers are all made of composite ethylene-vinyl acetate copolymer. The multi-layered structure of this automotive headliner features tight adhesion, preventing interlayer separation, good external rigidity, and no deformation. It also exhibits excellent sound absorption performance, is odorless, and is safe and environmentally friendly.

The utility model discloses a kind of photo-biological double-degradation mulching films, and it is related to mulching film technical field.It includes: double-degradation mulching film main body, woven mesh layer, fixedly arranged at the top of the outer wall of double-degradation mulching film main body, fixing mechanism, with two groups, each group fixing mechanism includes anti-tear strip and multiple fixed components, and the anti-tear strip is wrapped in the outer wall of double-degradation mulching film main body.The photo-biological double-degradation mulching film, the tensile strength and tear strength of double-degradation mulching film main body can be significantly increased by woven mesh layer, so that double-degradation mulching film main body is more durable, can withstand greater external force and pressure, improve the overall stability of double-degradation mulching film main body, also increase the friction of double-degradation mulching film main body surface, so that double-degradation mulching film main body surface has better antiskid performance when covering soil, and the mulching film can be firmly fixed on the ground by fixing mechanism, effectively prevent the mulching film from being blown up by wind, ensure the use effect of mulching film.

This invention relates to the field of TPE material technology, and provides a pet-grade TPE tear-resistant material and its application. By weight, it comprises the following components and contents: 40-60 parts TPO, 20-30 parts SEBS, 5-15 parts carbon black, 2-8 parts polyester fiber, 2-8 parts glass fiber, 1-4 parts nano-clay, 2-5 parts plasticizer, 2-6 parts toughening agent, 0.5-1.5 parts zinc oxide, and 0.1-0.5 parts metal phthalocyanine. Preferably, the plasticizer is one or more of dibutyl phthalate, dioctyl phthalate, or di(2-ethylhexyl) phthalate. Preferably, the toughening agent is one or more of EPDM, SBR, and HNBR. The pet-grade TPE tear-resistant material and its application provided by this invention exhibit excellent performance in terms of tear strength and abrasion index, meeting the high requirements of pet housing for tear and abrasion resistance, and has broad application prospects.