37 results about "Polyphthalamide" patented technology

The embodiment of the invention provides a heat exchange assembly, a battery device and an electric device. The battery device comprises a box body, a heat exchange assembly and a plurality of single batteries, the plurality of single batteries are arranged in the box body; the heat exchange assembly comprises at least two heat exchange pieces, at least one heat exchange piece is arranged to be a flexible piece, and at least one heat exchange piece is arranged to be a rigid piece. The flexible part and the rigid part are arranged in a stacked mode to form at least one medium flow channel. And at least one medium runner is used for conducting a heat exchange medium. At least one of the flexible member and the rigid member includes an anticorrosive layer. The anti-corrosion layer comprises a first anti-corrosion layer, and the first anti-corrosion layer is at least arranged in the area, where the medium flow channel is formed, of the rigid part. The first anti-corrosion layer comprises one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene; or the first anti-corrosion layer is of a layered structure, and at least one layer, close to the medium flow channel, of the first anti-corrosion layer comprises one or more of polypropylene, polyphenylene sulfide, polyphthalamide and polyethylene.

The invention relates to the technical field of plastic materials, in particular to a high-strength modified plastic product and a preparation process thereof. The preparation method comprises the following steps: uniformly mixing modified carbon fibers, a flame retardant, a photoinitiator and N, N-dimethylformamide, and performing ultraviolet irradiation, washing and drying to obtain a compound; uniformly mixing polyphthalamide, the compound, polyethylene wax, an antioxidant and a nucleating agent to obtain a blend; and carrying out melt extrusion, granulation and injection molding on the blend in a twin-screw extruder to obtain the modified plastic product. The modified plastic product prepared by the invention not only has excellent mechanical properties, but also has excellent flame retardance, and the use safety and durability of the modified plastic product are effectively improved.

The invention discloses a polypropylene beta crystal form compound nucleating agent, a beta crystal form homo-polypropylene pipe special material and a production process thereof, and belongs to the technical field of polypropylene materials. The polypropylene beta crystal form compound nucleating agent disclosed by the invention is prepared from the following components in percentage by weight: 15 to 20 percent of beta crystal form nucleating agent, 60 to 70 percent of antioxidant, 7 to 11 percent of calcium stearate and 5 to 10 percent of polyphthalamide. The polypropylene beta crystal form compound nucleating agent has the advantages of high beta crystal form conversion rate, high rigidity, low dosage, good dispersity and the like, and the normal and low temperature impact strength of the material can be greatly improved. The beta crystal form homo-polypropylene pipe special material product obtained by the production process has excellent impact strength, thermal deformation temperature and flexural modulus performance, also has excellent processability, and is suitable for the fields of chemical pressure pipelines and pipe fittings, extrusion and compression molded plates, filter plates and solid rods.

This application discloses a heat-insulating and high-temperature resistant PPR composite pipe and its preparation method. The PPR composite pipe includes an inner layer, a middle layer, and an outer layer. The inner layer, by weight, includes the following components: 80-90 parts of PP-RCT, 1-3 parts of boron-nitrogen co-doped graphene aerogel, 0.5-1.5 parts of antioxidant, 3-8 parts of boron nitride, 1-3 parts of polyphthalamide, and 0.5-2 parts of dispersant. The middle layer includes PP-RCT, chopped glass fiber, maleic anhydride-grafted polypropylene, and ethylene-vinyl alcohol copolymer. The outer layer includes PP-RCT and an ultraviolet absorber. This PPR composite pipe has excellent heat insulation and high-temperature resistance properties.

The invention relates to a plastic mold for reducing surface defects of fiber-reinforced polyphthalamide products, and belongs to the field of plastic mold technology. The product is mainly used in high-precision functional injection molding parts for automobiles. By setting a specific exhaust mechanism on the mold parting surface, the problem of burrs, surface burns and other surface defects of fiber-reinforced polyphthalamide resin during molding is solved, the defect rate is reduced, and production efficiency is improved.

A medical device includes an elongated body (14). At least a portion of the elongated body (14) includes a polymer blend of a polyphthalamide (PPA) and a cyclic olefin copolymer (COC) (PPA / COC). In some medical devices, the COC includes a copolymer of ethylene and norbornene having high stiffness and low moisture uptake, and the PPA includes some amount of renewable carbon content. In some medical devices that include a catheter (10), a higher stiffness proximal portion (24A) of the catheter (10) includes the polymer blend, and a lower stiffness distal portion (24B)of the catheter (10) includes an inner liner (50), an outer jacket (46), and a structural support member (48) between the inner liner (50) and outer jacket (46).

The invention discloses a nylon material and its preparation method and application. The raw materials for preparation include: nylon material, flame retardant synergist, heat stabilizer, poly-olefin graft copolymer; nylon material includes polyphthalamide, polylaurolactam derivative, polyhexamethylene adipamide; the raw materials for preparation of polyphthalamide include phthalic acid and isophthalic acid mixture; flame retardant synergist includes at least one of modified MMP, lanthanum oxide, silicon flame retardant, zinc borate, stannate and MCA; modified MMP is MMP with silicone oil coated on the surface; heat stabilizer includes one of S-EED, Lugman H10, cuprous iodide and potassium iodide; poly-olefin graft copolymer includes at least one of grafted SEBS, grafted POE and grafted PE. The nylon material of the invention solves the problems of the welding material in the existing SMT surface mounting equipment technology that is easy to turn yellow at high temperature, the bonding line strength is low, and the welding time is easy to blister.

Described herein is a polyamide composition comprising two polyamides and glass fiber, wherein one of the polyamides is a polyphthalamide formed by polycondensation from various monomers: dicarboxylic acid(s) with diamine(s) and / or amino acid(s), wherein at least one monomer contains a cyclohexyl group. It was surprisingly discovered that the polyamide composition has improved warpage and / or mold shrinkage properties, excellent mechanical performance and high Tg and / or Tm. Due to the excellent performance, the polyamide composition is suitable for molding and can be desirably incorporated into mobile electronic device applications.

This invention relates to the field of lithium-ion batteries, specifically disclosing a non-fluorinated large-particle binder for lithium-ion battery ceramic separators, a composite ceramic separator, and a preparation method thereof. The separator uses polyphthalamide as the core and a modified material as the shell. The modified material is formed by sequentially grafting and modifying propylene monomer, acrylamide monomer, and glycidyl acrylate. The glass transition temperature (Tg1) of the polyphthalamide is ≥220℃, and the glass transition temperature (Tg2) of the modified material is 35–70℃. The particle size range of the non-fluorinated large-particle binder for lithium-ion battery ceramic separators is 4–30 μm. This application uses a large-particle binder as the binding component of the ceramic separator, which fully binds the inorganic powder, resulting in excellent overall performance of the ceramic separator, possessing both excellent electrochemical performance and excellent thermal stability.

The application belongs to the technical field of surface treatment of silicon nitride fibers, and particularly relates to a surface treatment agent for silicon nitride fibers, a preparation method and application thereof. The raw materials of the surface treatment agent include 20-40 parts of polytetrafluoroethylene, 4-12 parts of an impregnating agent and 4-12 parts of a lubricant. The lubricant is selected from one or more of polyethylene wax, silicone oil, dimethyl silicone oil, polyphthalamide, trimethylolpropane oleate, glycerol trioleate, isooctyl acrylate and isooctyl methacrylate. The surface treatment agent prepared by the application can effectively act on the silicon nitride fibers under the synergistic effect of the lubricant and the impregnating agent. After secondary sizing, the bundle property, wear resistance, stiffness and bending resistance of the silicon nitride fibers are improved, the weaving performance requirements of the silicon nitride fibers are met, the process is simple, the cost is low, the application is suitable for industrial production, and the application can be widely applied.

The invention discloses a liquid guide medium and a preparation method thereof, the liquid guide medium comprises polyimide fibers and polyphthalamide fibers, and the polyimide fibers and the polyphthalamide fibers are mutually entangled. The liquid guide medium is good in temperature resistance, high in breaking strength, large in elastic modulus and high in consistency in the assembling and forming process.

The invention relates to a cable material for an electric automobile, in particular to a high-heat-conductivity and high-oil-resistance cable material for a charging liquid-cooled cable of the electric automobile, a preparation method of the cable material and the cable. The cable material is prepared from the following components in parts by mass: 55 to 70 parts of ethylene propylene diene monomer, 10 to 20 parts of ethylene-octene copolymer resin, 8 to 12 parts of compatilizer, 6 to 12 parts of polyethylene-acrylate rubber, 5 to 10 parts of ethylene-vinyl acetate copolymer, 2 to 5 parts of polyphthalamide, 60 to 80 parts of flame retardant, 20 to 30 parts of flame-retardant synergist, 15 to 25 parts of heat-conducting filler, 0.5 to 1 part of polyethylene wax and 1.2 to 2 parts of antioxidant. 0.9 to 1.2 parts of a cross-linking agent and 0.1 to 0.3 part of an anti-degradation agent. The high-thermal-conductivity and high-oil-resistance cable material for the charging liquid-cooled cable of the electric vehicle can meet the requirements of flexibility, high flame retardance, low thermal resistance, high and low temperature resistance, aging resistance, cracking resistance and high insulation at the same time.

The present invention relates to the technical field of oil seal materials, and provides a highly wear-resistant oil seal material and a preparation method thereof. A highly wear-resistant oil seal material comprises the following components in parts by weight: 120 parts of acrylate rubber, 15-25 parts of polyurethane, 8-16 parts of polyphthalamide, 16-35 parts of wear-resistant material, 10-15 parts of carbon black, 1-2 parts of vulcanization accelerator, and 2-4 parts of vulcanizing agent; the wear-resistant material comprises aluminum borate whiskers and acetylacetone metal complex in a weight ratio of 1-9:1. Through the above technical solution, the problem of poor wear resistance of oil seal materials in the related art is solved.

The present invention relates to the technical field of plastic materials, and specifically relates to a high-strength modified plastic product and its preparation process. In the present invention, modified carbon fiber, flame retardant, photoinitiator and N,N-dimethylformamide are mixed evenly, and after being irradiated with ultraviolet light, washed and dried, a composite is obtained; polyphthalamide, the composite, polyethylene wax, antioxidant and nucleating agent are mixed evenly to obtain a blend; the blend is melt extruded and granulated in a twin-screw extruder and injection molded to obtain a modified plastic product. The modified plastic product prepared by the present invention not only has excellent mechanical properties, but also has excellent flame retardant properties, effectively improving its use safety and durability.

The invention discloses a high-temperature-resistant lithium ion battery diaphragm with high ionic conductivity and a preparation method of the high-temperature-resistant lithium ion battery diaphragm, belongs to the technical field of battery diaphragms, and is used for solving the technical problem that the high-temperature resistance and the ionic conductivity of a lithium ion battery diaphragm in the prior art need to be further improved. The invention relates to a preparation method of a high-temperature-resistant lithium ion battery diaphragm with high ionic conductivity, which comprises the following steps: dissolving polyphthalamide and modified cellulose into an N, N-dimethylacetamide solution to form a spinning solution, and then preparing a spinning base membrane with the thickness of 29-31mu m by adopting electrostatic spinning. According to the preparation method disclosed by the invention, the polyphthalamide and the modified cellulose are taken as raw materials for electrostatic spinning, triazine modification is performed on the raw materials, and coating is performed by adopting the inorganic coating liquid, so that not only are the mechanical strength and the heat-resistant stability of the battery diaphragm effectively improved, but also the ionic conductivity of the battery diaphragm is improved, and the charge-discharge efficiency of a lithium battery is improved.

The present invention relates to a column structure built into a fuel tank, so the column structure comprises a column body and a column end, the column body and the column end are respectively composed of two materials, the column end wraps the column body, the two materials are connected by a rubber coating process, one material is used for both ends of the column, and is used for connecting the column with the inner wall of the fuel tank. The selected material needs to match the material of the inner wall of the fuel tank. Polyethylene (PE) material or modified polyethylene (PE) material is selected as the two end faces of the column, and the material is called material one; the column body is selected from one of polyphthalamide (PPA), polyoxymethylene (POM), modified polyoxymethylene, polyphenylene sulfide (PPS), and metal materials. The present invention provides a column structure design scheme for the interior of a fuel tank. The column is generally used inside a high-pressure fuel tank to improve the overall strength of the fuel tank, improve the mechanical properties of the fuel tank, and the column itself has a certain flexibility under tension and compression.

The invention discloses a new energy automobile charging pile and a high heat conduction sealing pipe thereof, relates to the technical field of new energy automobile charging pile heat management, and provides a three-layer composite pipe structure: an inner layer is a modified organic silicon material containing lozenge-shaped boron nitride (BNNSs) and core-shell Al2O3 coated SiO2 filler, a three-dimensional interpenetrating heat conduction network is constructed, and the in-plane heat conduction coefficient is 5.2 W / (m.K) and the thickness direction is 2.05 W / (m.K); the middle layer is made of + / -45-degree aramid fiber woven reinforced high-temperature nylon, and the pressure resistance value reaches 12.5 MPa; the outer layer is nano-montmorillonite modified polyphthalamide, and the strength retention rate is larger than or equal to 90% after the composite material is soaked in ethylene glycol for 5000 h. Through core-shell filler interface bonding optimization, the interface thermal resistance is reduced to 8.2 * 10 <-8 > m < 2 >. K / W, and interlayer bonding strength 4.8 MPa is realized by combining a three-layer co-extrusion process. When the spiral winding pipeline is applied to a liquid cooling system of a charging gun, the temperature of a contact point is smaller than or equal to 65 DEG C under the working condition of 1000 A due to the spiral winding pipeline (the distance between the pipelines is smaller than or equal to 2 mm), the thermal response time is shortened to 28 seconds, the bursting pressure is increased by 300%, the permeability of cooling liquid is reduced by 60%, and the requirements for efficient heat dissipation and long-acting sealing in a large-current fast charging scene are met.

The invention discloses a wave-absorbing / bearing composite material with a gradient fold sandwich structure and a preparation method thereof.The wave-absorbing / bearing composite material with the gradient fold sandwich structure comprises a transmission panel, a reflection bottom plate and a middle sandwich plate located between the transmission panel and the reflection bottom plate, and the middle sandwich plate is provided with a fold structure; the plate thickness of the middle sandwich plate is changed from thin to thick from top to bottom in the height direction of the wave-absorbing / bearing composite material, and then is changed from thick to thin; the middle sandwich plate is provided with N material gradient layers from bottom to top, any material gradient layer contains carbon fiber reinforced polyphthalamide, at least one material gradient layer located in the middle further contains carbonyl iron powder, the minimum reflection loss of the wave-absorbing / bearing composite material in the frequency band of 2-18 GHz is superior to-10 dB, and the wave-absorbing / bearing composite material has the advantages that the wave-absorbing / bearing composite material can be applied to the wave-absorbing / bearing composite material in the frequency band of 2-18 GHz; incident electromagnetic waves can be effectively absorbed, reflected signals are reduced, and then the radar stealth performance of flight equipment is improved.

The application belongs to the technical field of polyethylene film material, and particularly relates to a biaxial PE stretch film and a preparation method and application thereof. The biaxial PE stretch film is composed of an outer layer, a middle layer and an inner layer. The outer layer is a TPU film, which comprises TPU particles, an ultraviolet absorber and an antioxidant. The middle layer is a matte PE film, which comprises low-density polyethylene, linear low-density polyethylene, metallocene polyethylene, a composite additive, polyphthalic amide, a dispersing agent and an antioxidant. The inner layer is a milky white PE film, which comprises low-density polyethylene and high-density polyethylene and titanium white powder. The biaxial PE stretch film prepared by the application effectively improves the tensile strength, elongation at break and puncture resistance of the prepared biaxial PE stretch film by improving raw materials and optimizing a process flow, and can be applied to a surface protection film of a child crawling mat, an EPE, an XPE splicing mat protection film, a yoga mat protection film and a protection film containing all floor mats.

The application discloses a high-temperature-resistant and high-rigidity oil tank valve body sealing gasket skeleton material and a preparation method thereof, and belongs to the technical field of automobile fuel system component manufacturing. The skeleton material comprises the following raw materials in parts by weight: 70-80 parts of polyphthalamide resin, 13-15 parts of glass fiber, 12-14 parts of carbon fiber, 2-3 parts of ethanol aqueous solution containing KH-550, 3-6 parts of modifier, 0.5-1 part of antioxidant and 0.4-0.8 part of lubricant. The modifier has a molecular structure comprising a fluoralkyl chain, a long alkyl chain, a sulfonyl group and a benzene ring. The application cooperatively enhances the glass fiber and the carbon fiber, and combines the special modifier, so that the high-temperature resistance, the impact resistance, the dimensional stability and the fuel swelling resistance of the material are significantly improved, the problems of insufficient mechanical property and poor medium resistance of the existing polyphthalamide material are solved, and the application is suitable for the high-demand automobile oil tank valve body sealing gasket.

This invention provides a lithium-ion battery negative electrode and its preparation method. The negative electrode includes a negative electrode active material layer, which comprises a negative electrode active material, a binder, and a conductive agent. The binder is added at an amount of 0.5-1.5 wt% of the negative electrode active material layer. The binder comprises 65-70 wt% polyacrylonitrile and 30-35 wt% of one or a mixture of two of polyacrylic acid and / or polyphthalamide. By compounding the polyacrylonitrile binder, which has a certain thickening effect, with polyacrylic acid and polyphthalamide, the amount of binder used is significantly reduced, thereby improving the low-temperature performance and cycle performance of the battery.

The invention relates to a polyphthalamide material as well as a preparation method and application thereof. The polyphthalamide material comprises the following components in parts by mass: 45-55 parts of polyphthalamide; 4-6 parts of an inorganic synergistic flame retardant; 12 to 18 parts of a halogen fire retardant; 28-32 parts of a functional short fiber combination; 0.9 to 1.1 parts of an auxiliary agent; wherein the functional short fiber combination is composed of enhanced short fibers and conductive short fibers. Thus, by adopting the synergistic effect of the components, high temperature resistance, UL94 V0-level flame retardance, electric conduction and electromagnetic interference resistance are integrated at the same time, the mechanical property is excellent, and the technical problems that in an existing polyphthalamide modification technology, single-function modification cannot meet the requirements of multiple scenes, and the mechanical property is seriously degraded due to superposition of multiple properties are effectively solved.

The utility model belongs to the technical field of power cables, and particularly relates to a cold-resistant flame-retardant power cable, which comprises an inner support and a plurality of cable cores circumferentially distributed on the outer side of the inner support, an inner coating layer is arranged outside the cable cores, a shielding layer is formed outside the inner coating layer, an arc-shaped groove is formed in the outer side of the inner support, and the arc-shaped groove is communicated with the inner support. Buffer strips capable of forming buffer space in the cable are arranged in the arc-shaped grooves, the cable core is attached to the inner sides of the buffer strips, and thermoplastic elastomers distributed circumferentially are further arranged on the outer sides of the inner support and the cable core. It can be understood that the polyphthalamide arranged outside the cable has a flame retardant effect, the thermoplastic elastomer arranged on the inner side can achieve the flame retardant effect, can resist low temperature and ensure the performance of the cable, and the arranged buffer strips can form a buffer space in the cable to ensure the bending degree of the cable. Meanwhile, the thermoplastic elastomer is of a spliced structure, so that the cable performance can be ensured while production is facilitated.

The present invention provides a high-temperature resistant polyphthalamide composite material for LED lamp beads and a preparation method thereof, relating to the field of polymer material technology. The composite material comprises the following components, by mass percentage: 45-65% polyphthalamide, 35-55% silicon nitride, 0.1-2% compatibilizer, 0.2-0.6% antioxidant, 0.2-0.4% lubricant, and 0.3-0.5% nucleating agent. The present invention blends β-silicon nitride with polyphthalamide, utilizing the synergistic effect between PPA and β-silicon nitride, which have different structures and thermal conductivities: the added β-silicon nitride forms a cubic structure within the PPA, thereby comprehensively enhancing the material's rigidity, allowing the material to absorb a large amount of external force simultaneously, and effectively improving the material's high-temperature resistance and thermal conductivity.

A medical device includes an elongated body. At least a portion of the elongated body includes a polymer blend of a polyphthalamide (PPA) and a cyclic olefin copolymer (COC) (PPA / COC). In some medical devices, the COC includes a copolymer of ethylene and norbornene having high stiffness and low moisture uptake, and the PPA includes some amount of renewable carbon content. In some medical devices that include a catheter, a higher stiffness proximal portion of the catheter includes the polymer blend, and a lower stiffness distal portion of the catheter includes an inner liner, an outer jacket, and a structural support member between the inner liner and outer jacket.

The invention belongs to the technical field of pipe preparation, and particularly relates to a high-impact-resistance and high-strength PE water supply pipe and a preparation method thereof. Comprising the following components in parts by weight: 100 to 104 parts of polyethylene resin, 2 to 4 parts of carbon black, 0.1 to 0.2 part of an antioxidant, 2 to 3 parts of polyamide wax micro powder, 0.1 to 0.2 part of a 1-coupling agent, 0.8 to 1 part of tris (nonylphenyl) phosphite, 1 to 1.5 parts of calcium fluoride, 1 to 1.5 parts of octyl epoxy stearate and 3 to 6 parts of a performance additive. The performance additive is prepared from the following raw materials in parts by weight: 40 to 45 parts of medium density polyethylene, 18 to 20 parts of polyphthalamide, 1 to 2 parts of aluminum nitride, 1 to 2 parts of bentonite grease, 0.1 to 0.2 part of calcium peroxide, 1 to 2 parts of 2-coupling agent, 0.5 to 0.8 part of microcrystalline cellulose, 0.1 to 0.2 part of nano toughening agent and 0.1 to 0.2 part of compatilizer. The water supply pipe is good in surface smoothness and high in scratch resistance and impact resistance, the friction coefficient between the PE water supply pipe and the ground in the dragging process is effectively reduced, and the product is high in toughness, corrosion resistance, oxidation resistance and impact resistance.

The present invention discloses a method for preparing a rat- and ant-proof flexible busbar, which belongs to the technical field of busbars. The flexible busbar uses a copper wire busbar as its inner core. The outer surface of the copper wire busbar is covered with a high-strength insulation layer. The outer surface of the high-strength insulation layer is covered with an XLPE natural moisture-proof layer. The outer surface of the XLPE natural moisture-proof layer is covered with a metal wrapping layer. The outer surface of the metal wrapping layer is covered with a high-density PE layer. The outer surface of the high-density PE layer is covered with a nylon protective layer. The nylon protective layer is made of a rat- and ant-proof composite nylon material. The rat- and ant-proof composite nylon material includes amino acid grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat- and ant-proof layered double metal hydroxide, lubricant, and antioxidant. The components cooperate with each other, and the prepared composite nylon material cooperates with protective layers such as metal wrapping layers to effectively prevent the invasion of rats and ants.

The invention relates to a rotor sleeve made of or comprising a thermoplastic composite material (TPC), the thermoplastic composite material (TPC) comprising or consisting of: (1) a polymer matrix (P); and (2) continuous fibers; wherein the polymer matrix (P) comprises or consists of: at least one thermoplastic polymer having a Tg higher than 90 DEG C and selected from the group consisting of a polyaryletherketone (PAEK), a polyphthalamide (PPA), a polyamide-imide (PAI), a polyphenylene sulfide (PPS) and a blend of two or more of said polymers; optionally at least one plastic additive; and wherein the continuous fibers are selected from the group consisting of: continuous carbon fibers (CF), and continuous glass fibers (GF).

The invention relates to a single-layer or multi-layer tubular structure for conveying a coolant, said tube being intended for fuel cell cooling, comprising at least one inner layer (I) comprising at least one thermoplastic polymer selected from the group consisting of polyolefins, thermoplastic vulcanizates (TPV), fluorinated polymers, polyphenylene sulfide (PPS) and polyphthalamide (PPA), the coolant has a dielectric conductivity of less than 30 [mu] S / cm as determined after the single-layer or multi-layer tubular structure in contact with the coolant is aged at 80 DEG C for 168 hours.