13results about How to "Small permanent deformation" patented technology

The invention discloses an anti-rut enhanced epoxy asphalt mixture and a preparation method thereof, belongs to the technical field of asphalt mixture processing, and is used for solving the technical problem that the anti-rut performance, the water stability and the low temperature resistance of an asphalt mixture in the prior art need to be further improved. The modified asphalt is prepared from the following components in parts by weight: 16 to 20 parts of matrix asphalt, 0.8 to 1 part of additive, 4 to 6 parts of reinforced elastomer, 3 to 5 parts of epoxy modified polysiloxane, 4 to 5 parts of modified reinforced fiber and 65 to 75 parts of aggregate, according to the invention, the asphalt mixture composed of the matrix asphalt and the aggregate is reinforced by the reinforced elastomer, the epoxy modified polysiloxane and the modified reinforced fibers, so that the rutting resistance of the epoxy asphalt mixture is effectively improved, and the water stability and low temperature resistance of the epoxy asphalt mixture are also improved.

The present invention provides a special optoelectronic composite cable for use in extremely cold weather, belonging to the technical field of optoelectronic composite cable preparation; it comprises a cable core, a water-blocking layer, a cold-resistant reinforcement layer, and a cold-resistant sheath layer. The present invention effectively prevents moisture intrusion through the water-blocking layer, the cold-resistant reinforcement layer provides additional mechanical strength, and the cold-resistant sheath layer fully protects the internal structure of the optoelectronic composite cable. This multi-level and multi-functional structural design enables the optoelectronic composite cable in extremely cold weather to better meet the complex use requirements in extremely cold environments, and provides a reliable solution for communications and energy transmission in cold areas.

The utility model provides a side bearing device and a bogie with the side bearing device, and the side bearing device comprises a side bearing seat which comprises a bottom plate, a first vertical plate, a second vertical plate and a convex column, the first vertical plate and the second vertical plate are connected to two sides of the bottom plate, and the convex column is arranged on the bottom plate; the taper sleeve structure comprises a first taper sleeve and a second taper sleeve arranged on the outer side of the first taper sleeve in a sleeving mode, and the first buffering piece is connected between the first taper sleeve and the second taper sleeve. The first side plate and the second side plate are arranged on the two opposite sides of the taper sleeve structure, a second buffer part is connected between the first side plate and the taper sleeve structure, a third buffer part is connected between the second side plate and the taper sleeve structure, and the top plate is connected to the taper sleeve structure; the positioning structure is arranged between the top plate and the taper sleeve structure; the connecting structure is arranged between the top plate and the taper sleeve structure, and the connecting structure and the positioning structure are arranged at intervals. According to the technical scheme, the problem that the use effect of the elastic side bearing is affected due to the fact that the top plate of the elastic side bearing is easily separated from the rubber body in the prior art is effectively solved.

The invention discloses a novel chemical milling protective strippable coating, which is composed of 8.0-12% of SEEPS resin, 2-8% of SEPS resin, 4-6% of hydrogenated petroleum resin, 15-18% of filler, 0.01-0.05% of pigment, 1-5% of assistant and 51-60% of solvent, SEPS and SEEPS thermoplastic elastomer are used as main body base resin, and SEPS has short methyl unit series, so that SEPS cannot crystallize, is softer than crystalline SEBS thermoplastic elastomer, and has better chemical milling protection performance. The SEPS has a short methyl unit series, so that the SEPS cannot crystallize and is softer than a crystallized SEBS thermoplastic elastomer, and the elasticity and hysteresis behavior of the SEPS are better than those of the SEBS. Meanwhile, the SEEPS resin which is low in viscosity, high in tensile strength and low in permanent deformation and has SEBS and SEPS properties is introduced into the formula, so that the problems of serious coating loss and low construction efficiency caused by poor defoaming and low solid content of a chemical milling protection strippable coating product under the condition of optimal construction viscosity, and the problems of substrate leakage corrosion, serious paint film warping and poor corrosion resistance during high-temperature deep chemical milling processing are solved. The problem that the etching ratio is large due to the fact that the milling cutting edge of the chemical milling base material moves upwards and a two-step phenomenon is generated is solved.

The utility model discloses a wire arranging device, comprising a wire arranging device body, a positioning groove arranged on a wall surface of the wire arranging device body, and the wire arranging device body is suitable for positioning at least one cable; the supporting plate is accommodated in the positioning groove, and the strength of the supporting plate is greater than that of the wire arrangement device body; the wire arrangement device body and the supporting plate are suitable for being positioned on a testing machine. According to the utility model, the supporting plate is accommodated in the positioning groove on the back surface of the wire arranging device body, when the wire arranging device positions a cable, the wire arranging device body transmits the force to the supporting plate, the strength of the supporting plate is greater than that of the wire arranging device body, and the overall strength of the wire arranging device is enhanced through the supporting plate, so that the problem that the wire arranging device is easy to bend is solved; and the service life of the wire arrangement device is greatly prolonged. The wire arrangement device body is made of TPU materials and manufactured through the 3D printing technology, and the problems that an existing wire arrangement device is prone to deformation and poor in storage performance are solved.

The invention discloses photocatalytic modified asphalt based on g-C3N4 / CeO2 / Bi2O3 / TOM. According to the invention, an organic long chain DC5700 is grafted to the surface of a photocatalyst so as to improve the compatibility of the photocatalyst and an asphalt material. Under different light source conditions, the degradation effects on different components in tail gas are different, and compared with a traditional asphalt material, the degradation effect is more efficient. After the photocatalyst is added into asphalt, the permanent deformation of an asphalt material can be reduced, and the high-temperature stability is relatively good.

The application discloses an ultrahigh molecular weight polyethylene-acrylonitrile butadiene rubber composite elastic material, which comprises 70wt%-95wt% of ultrahigh molecular weight polyethylene and 5wt%-30wt% of acrylonitrile butadiene rubber powder, has an island-sea structure, wherein the acrylonitrile butadiene rubber powder is a dispersed phase, the ultrahigh molecular weight polyethylene is a continuous phase, and the dispersed phase and the continuous phase are connected by C-C chemical bonds; and the particle size of the acrylonitrile butadiene rubber powder is less than or equal to 0.7mm. By limiting the content of the ultrahigh molecular weight polyethylene and the acrylonitrile butadiene rubber powder, combining the connection between the two phases by C-C chemical bonds and limiting the particle size of the acrylonitrile butadiene rubber powder, the rubber particles in the composite elastic material are first deformed when the composite elastic material is subjected to external force, so that the composite elastic material has good resilience and lower permanent deformation at a smaller strain.

The invention provides a special photoelectric composite cable used in extremely cold weather, and belongs to the technical field of photoelectric composite cable preparation. Comprising a cable core, a waterproof layer, a cold-resistant reinforcing layer and a cold-resistant sheath layer, the waterproof layer effectively prevents moisture from invading, the cold-resistant reinforcing layer provides extra mechanical strength, and the cold-resistant sheath layer comprehensively protects the internal structure of the photoelectric composite cable. The multi-layer and multifunctional structural design enables the photoelectric composite cable in extremely cold weather to better meet complex use requirements in extremely cold environments, and provides a reliable solution for communication and energy transmission in cold regions.

This invention belongs to the field of polymer sealing materials technology, specifically relating to a modified PTFE sealing material, its preparation method, and its application. The modified PTFE sealing material provided by this invention comprises the following components: polytetrafluoroethylene resin, bronze powder, nano-carbon materials, polyimide micropowder, potassium titanate whiskers, graphite, coupling agent, and lubricant. The modified PTFE sealing material provided by this invention exhibits high wear resistance, extremely low wear rate, excellent creep resistance, good self-lubrication, and thermal conductivity, enabling it to maintain excellent performance under various operating conditions (high-speed, high-temperature, and extreme-pressure conditions), thus extending the service life of the sealing components.

The invention discloses a silica gel-based material with high biocompatibility and elasticity as well as a preparation method and application of the silica gel-based material. The silica gel-based material with high biocompatibility and elasticity is prepared from bio-based polyurethane and polyether modified siloxane. According to the preparation method, modified polypyrrolidone is taken as a chain extender, glycidyl is taken as an end-capping reagent, a polycaprolactone prepolymer is subjected to chain extension and end capping, bio-based polyurethane is prepared, and the bio-based polyurethane is enhanced through polyether modified polysiloxane, so that the biocompatibility of a silica gel-based material is effectively improved; the tensile property and the compressive deformation resistance of the material are also improved. The silica gel-based material disclosed by the invention can be used for preparing medical catheters or thrombus simulants, and is applied to interventional operations.

This application relates to the textile field, specifically disclosing a thermal insulation fabric and its production method. The thermal insulation fabric comprises, from the outside in, a PTFE garment film, an adhesive layer, a polyethersulfone / polyurethane mixed fiber wadding, a hollow PBT core-sheath composite fiber layer, an adhesive layer, and a polyurethane / zirconia aerogel composite fiber layer. The polyurethane / zirconia aerogel composite fiber layer is woven from polyurethane / zirconia aerogel composite fibers, which have a core-sheath structure. It is prepared by coaxial wet spinning of the sheath solution and the core solution, followed by impregnation in a tert-butanol aqueous solution, pre-freezing, and freeze-drying. The sheath solution is a polyurethane solution, and the core solution is a polyurethane solution containing zirconia aerogel powder, with a mass ratio of zirconia aerogel powder to polyurethane of 0.2-0.3:1. The thermal insulation fabric of this application has the advantages of good thermal insulation effect, high mechanical strength, high compression resilience, and relatively fluffy texture.

The invention discloses a high-temperature resistant perfluoroether rubber composition and a preparation method thereof, belonging to the technical field of rubber compositions. The composition comprises perfluoroether rubber raw rubber, 1,6-bis[4-(trifluorovinyl)phenyl]dodecafluorohexane, 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, graphene oxide and carbon nanotubes, wherein 1,6-bis[4-(trifluorovinyl)phenyl]dodecafluorohexane and 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane are used as vulcanizing agents to enable the perfluoroether rubber product to resist a high temperature of 300 DEG C and superheated water vapor, wherein graphene oxide and carbon nanotubes are used as functional fillers to enable the perfluoroether rubber to have a small permanent deformation under high-temperature compression and have excellent free radical scavenging ability, can preferentially capture free radicals generated by thermal decomposition of the perfluoroether rubber, delay the decomposition of the perfluoroether rubber, and significantly improve the temperature resistance of the perfluoroether rubber.

[Problem] The object of the present invention is to provide polyurethane elastic fibers with excellent fabric properties and stability of fabric properties over time, achieved by including a specific polyurethane in the polyurethane elastic fibers, the specific polyurethane having a salt structure in its molecular structure in which specific functional groups are ionicly bonded to each other; and to provide a method for producing such polyurethane elastic fibers. Another object of the present invention is to provide a polyurethane elastic fiber that allows for easier fiber inventory control and processing condition management during use, and can be used to obtain fabrics with stable fabric properties and fabric quality; and to provide a method for producing such polyurethane elastic fibers. [Solution] A polyurethane elastic fiber comprising polyurethane A and additive B. Polyurethane A: A polyurethane using a polymeric diol, diisocyanate, and chain extender as starting materials and not containing a tertiary amine in the backbone. Additive B: A polyurethane or polyurea using a diol and / or diamine and diisocyanate as starting materials and having a tertiary amine nitrogen bonded only to non-aromatic carbons in the backbone, the tertiary amine nitrogen being ionicly bonded to a sulfonic acid compound to form a sulfonic acid amine.