13results about How to "Limit slip" patented technology

The present application relates to the technical field of external use patch, disclose a kind of neck shoulder waist leg pain health care patch and its preparation method, the health care patch includes backing layer, ointment layer and anti-adhesion release layer;Ointment layer raw material includes: traditional Chinese medicine extract flow leaching paste, L- (+) -tartaric acid, PVP K30, PEG-400, ternary eutectic solvent, polyacrylate pressure sensitive adhesive matrix and ultrafine medicinal powder.Preparation, after flow leaching paste, tartaric acid etc. are mixed, gel precursor is formed by vacuum dewatering and dealcoholization, swelling is added again with eutectic solvent, and then mixed with pressure sensitive adhesive matrix and medicinal powder high shear, finally coating solidification.The present application constructs physical crosslinking gel network in colloid interior and promotes effective component acid-base salt formation, effectively avoids polar component crystallization precipitation, reduces the skin irritation caused by drug burst release, simultaneously improves the cohesion of ointment, realizes long-acting smooth drug release.

The utility model discloses a kind of deep backfill foundation ramming area limiting anchoring grating, including at least one grating unit, it includes the rectangular frame enclosed by basalt fiber bundle, rectangular frame outside is provided with the fixing piece for connecting support pole or adjacent grating unit, several sign blocks corresponding with ramming point position are set in rectangular frame, sign block includes the circular frame enclosed by basalt fiber bundle, circular frame is provided with the sign structure for indicating ramming sequence formed by polyurethane fiber bundle, rectangular frame and circular frame are connected together by warp and weft net formed by basalt fiber bundle.The utility model limits by the sign block of grating unit inner arrangement ramming point, guarantees the drop point position of heavy hammer of dynamic compaction method construction, drop hammer sequence and ramming number of times, improves dynamic compaction method construction normative, improves foundation anti-deformation capacity, improves the overall stress uniformity of tamping filler, reduces the occurrence of foundation uneven settlement phenomenon.

The application relates to the field of high polymer material and film processing technology, in particular to a forming and processing technology of a biaxially stretched polymer film; the technology comprises the steps of inorganic particle surface modification, esterification, polycondensation, melt extrusion casting and biaxial stretching and winding; the technology combines specific monomer copolymerization to provide main chain rigidity and steric hindrance, and cooperates with multifunctional crosslinking monomers to build a slightly long branched and micro-crosslinked structure in the system; the core is to introduce an end group reaction agent and a macromolecular antioxidant to close the polar end group to inhibit degradation, and to combine the surface modified nanoparticles with the monomer containing a sulfonate group to form a polar ion aggregate in the amorphous region; the application overcomes the defects that the traditional process lacks a main chain rigidity cooperative design and an end group closing mechanism, causes a significant increase in thermal shrinkage and a decrease in dielectric performance in a high temperature and high frequency scene, improves the thermal dimensional stability of the material, and improves the dielectric breakdown strength and the surface metal layer adhesion.

The utility model provides an adjustable limiting device for preventing a section steel overhanging discharging platform from moving backwards, which belongs to the field of building construction devices and comprises a component A and a component B. The component B comprises an I-shaped steel main beam and a plurality of first square steels, and a front-end U-shaped anchor ring is pre-buried at the front end of the I-shaped steel main beam close to a sealing beam. The I-shaped steel main beam is arranged in the front-end U-shaped anchor ring, the multiple pieces of first square steel are arranged on the upper surface of the I-shaped steel main beam at equal intervals, a groove is formed between every two adjacent pieces of first square steel, the lower end of the A assembly is clamped in the grooves, and the upper end of the A assembly is arranged on the front-end U-shaped anchor ring; an iron gasket and double nuts are arranged above the two ends of the A assembly respectively, and the iron gasket and the double nuts are arranged on the front-end U-shaped anchor ring respectively. The first square steel is arranged on the upper surface of the I-shaped steel main beam to form the groove, and the section A assembly is clamped into the groove to form up-down concave-convex meshing, so that backward sliding of the section steel overhanging discharging platform is limited.

This invention relates to the field of structural reinforcement technology and discloses a reinforcement structure for the horizontal joint of a prefabricated concrete tower for wind turbines. The structure includes a first tower, a second tower mounted on top of the first telescopic tower, and hollow blocks fixedly connected to both the first and second towers. It also includes: several anti-detachment parts arranged in a circular array on two hollow blocks; and several reinforcing parts also arranged in a circular array on two hollow blocks. This invention, by incorporating anti-detachment parts, solves the problem that existing reinforcement structures lack effective anti-detachment limiting mechanisms during use, making it difficult to achieve stable locking of connecting bolts. This makes them vulnerable to the effects of vibration and wind loads during tower operation, leading to loosening of the nuts and causing the horizontal joint reinforcement to loosen and fail, thus affecting the overall structural safety of the tower.

This invention discloses a highly elastic and resilient vinyl elastomer and its preparation method. The method includes: solution polymerization of ethylene, comonomers, and functional monomers in the presence of a catalyst to obtain a vinyl copolymer precursor; subsequently, dissolving the precursor in an organic solvent, adding a ring-closing reagent to perform an intramolecular ring-closing reaction, and adding a monofunctional end-capping agent to terminate the reaction; and obtaining the vinyl elastomer after separation, washing, and drying. By controlling the monomer feed in stages, a gradient structure is formed in the molecular chain, with ethylene-rich segments at both ends and α-olefin-rich segments in the middle. Combined with the intramolecular ring-closing structure, topological constraints are introduced, significantly improving the material's elastic recovery performance while maintaining thermoplastic processability. The resulting material exhibits a resilience of over 63%, a compression set of less than 24%, a melt strength of over 7.1 cN, and a gel content of less than 1.2%.

This application relates to a low-temperature resistant and creep-resistant hot-melt pressure-sensitive adhesive and its preparation method, belonging to the field of label adhesive technology. The raw materials for preparation include the following components in parts by weight: 35-45 parts of modified styrene-isoprene-styrene block copolymer, 10-15 parts of ethylene-vinyl acetate copolymer, 20-40 parts of hydrogenated petroleum resin, 15-30 parts of terpene resin, 8-18 parts of naphthenic oil, 0.5-1.5 parts of antioxidant, and 4-8 parts of polyisobutylene. This application introduces trifluoromethyl and epoxy groups simultaneously into the styrene-isoprene-styrene molecular chain through free radical grafting. The former imparts low surface energy to the adhesive layer, ensuring rapid wetting and initial tack at -20°C; the latter constructs a chemical network through latent ring-opening crosslinking, synergistically enhancing the physical entanglement of polyisobutylene, achieving simultaneous improvement in low-temperature rapid adhesion and high-temperature creep resistance, suitable for harsh environments such as cold chain labels.

The utility model discloses a chiffon fabric, including first longitudinal strip and second longitudinal strip who arranges alternately along the width direction of fabric width, second longitudinal strip includes first area and second area who arranges alternately along the length direction of fabric, under normal state, the length L1 of second area is the length L2 of first area 0.5 times, under the condition of warp stretch, the length L3 of second area is the length L2 of first area 1.5 times, under the condition of weft stretch, the width of second area is greater than the width of first area. The utility model discloses through the partial interweaving bending of first longitudinal strip's weft yarn, the warp yarn of first area is all interweaving bending, thereby increasing the cohesion between yarn, limit the yarn slippage of adjacent area, and the twist of second area's yarn is higher than the yarn of first longitudinal strip and the yarn of first area, thereby making second area form deformation area, when fabric is under external force, second area changes with fabric stretch and reduces the first area and first longitudinal strip's tensile stress.

The application relates to the field of rubber for oil seals, and discloses a fluororubber with low friction and low temperature rise and a preparation method thereof, the fluororubber is made of the following raw materials in parts by weight: modified FKM 100 parts; nickel-coated graphite 0.5-5 parts; flaky graphite 0.5-5 parts; modified PTFE micro powder 1-10 parts; high-activity magnesium oxide 1-10 parts; calcium hydroxide 0-6 parts; WS2800 2 parts; Brazil palm wax 0-2 parts; glass fiber 0-5 parts; modified calcium silicate 0-50 parts; BPP 0.2-1 part; bisphenol AF 0.5-2 parts. The flaky graphite and the modified PTFE micro powder form a lubricating film at the interface to reduce friction, and the nickel-coated graphite is used to build a heat conduction channel to conduct heat out, so that the friction coefficient is reduced and the temperature rise is controlled. In combination with the modified matrix and the reinforcing filler, the stability of the crosslinking network is improved, the material has excellent high-temperature anti-aging performance and rigidity, and the service life of the oil seal is prolonged.

This invention relates to the field of cable technology and proposes a high-strength overhead insulated conductor, comprising a conductor and an insulation layer arranged sequentially from the inside out. The insulation layer comprises the following raw materials: polyethylene, ethylene-vinyl acetate copolymer, maleic anhydride-grafted polyethylene, reinforcing agent, antioxidant, ultraviolet absorber, and lubricant. The reinforcing agent includes modified silica, which is obtained by modifying silica with a silane coupling agent and polybutylene terephthalate. The conductor insulation layer provided by this invention has good tensile strength, solving the technical problem of insufficient strength of existing overhead insulated conductor insulation layers.

This invention relates to a high-impact polyethylene composite modified plastic and its preparation method, belonging to the field of polyethylene plastics technology. The invention involves creating a self-made modifier and using this modifier to modify chlorinated polyethylene to obtain modified chlorinated polyethylene. This modified chlorinated polyethylene is then blended with polyethylene and silica to obtain a composite modified plastic. The siloxane groups at the end of the modifier can combine with the hydroxyl groups on the silica surface, improving the interfacial bonding between the filler and the polymer, and enhancing the mechanical properties of the material. The pyridine ring forms a stable conjugated π-electron system with benzotriazole, synergistically expanding the ultraviolet absorption range of the material, thereby enhancing its ultraviolet absorption performance. The quaternary ammonium salt structure formed by the combination of the modifier and chlorinated polyethylene can form ion-conducting channels in the polymer matrix, reducing surface charge accumulation and lowering surface resistivity, thus endowing the material with excellent antistatic properties.

The application relates to the technical field of modified polytetrafluoroethylene composite materials, and discloses a high-wear-resistance and creep-resistance modified polytetrafluoroethylene composite material and application of the material in a precision shaft sleeve. In the material, nano zirconium oxide is fixed on the surface of chopped carbon fibers and near the lap joint nodes together with polyamide acid, preferably, octaaminophenyl cage polysilsesquioxane is further introduced to form a POSS hybrid polyimide interface layer, and then the material is mixed with polytetrafluoroethylene and flaky graphite, cold-pressed and sintered. The obtained multi-scale bearing structure can reduce particle agglomeration and falling, limit the interface and fiber node slip, and improve the wear resistance, compression creep resistance of the material and the long-term dimensional stability of the precision shaft sleeve.

This invention discloses a flame-retardant and high-temperature resistant CPVC cable protection pipe and its preparation method, belonging to the field of pipe preparation. It addresses the technical problem that the flame-retardant and high-temperature resistance properties of existing CPVC cable protection pipes need further improvement. Specifically, it comprises the following components by weight: 80-100 parts CPVC, 8-15 parts flame-retardant modified eugenol, 1-3 parts mercapto-modified graphene oxide, 2-5 parts modified reactive anti-aging agent, and 1-3 parts excipients. This invention utilizes a peroxide-initiated in-situ mercapto-olefin click crosslinking reaction between flame-retardant modified eugenol, mercapto-modified graphene oxide, and the modified reactive anti-aging agent to successfully construct a three-dimensional inorganic-organic hybrid network within the CPVC matrix, significantly improving the flame-retardant, high-temperature resistance, thermo-oxidative aging resistance, and mechanical strength of the CPVC cable protection pipe.