15 results about "Polyphthalamide" patented technology

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.

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 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 invention discloses a polymer composite modifier as well as a preparation method and application thereof, and relates to the field of asphalt preparation. Comprising the following components: polyethylene waste, polyurethane waste, waste SEBS, polystyrene waste, polyester waste, butyl rubber waste, butadiene styrene rubber waste, polyphthalamide and waste polystyrene. The preparation method comprises the following steps: uniformly stirring the components according to the ratio to obtain a preliminarily mixed material; the mixed material is crushed after being circularly ground for multiple times; and freezing the crushed material, and grinding to obtain the compound modifier. The polymer composite modifier is applied to preparation of asphalt for roads. According to the invention, the multi-source polymer waste with complex components is converted into a modifier product with uniform performance, high efficiency and high added value, and the modifier is applied to the preparation of the asphalt for the road, so that multiple targets of high performance, low cost, energy conservation, environmental protection and simplicity and convenience in operation are achieved.

1. The name of the design product: aromatherapy (polyphthalamide). 2. The use of the design product: for emitting fragrance. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

1. Name of the design product: Staircase step (combined stacked polyphthalamide pot) 2. Use of the design product: The design product is used in the construction industry and can be assembled into a staircase connecting upper and lower floors for people to go up and down the stairs. 3. Design points of the design product: in shape. 4. Picture or photo that best indicates the design points: perspective view.

The application discloses a high-ionic-conductivity high-temperature-resistant lithium ion battery diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms, and is used for solving the technical problem that the high-temperature resistance and ionic conductivity of the lithium ion battery diaphragm in the prior art need to be further improved. The preparation method of the high-ionic-conductivity high-temperature-resistant lithium ion battery diaphragm comprises the following steps: dissolving polyphthalic amide and modified cellulose into an N,N-dimethylacetamide solution to form a spinning solution, and then adopting electrostatic spinning to prepare a spinning base film with a thickness of 29-31 mu m. After the electrostatic spinning of the polyphthalic amide and the modified cellulose as raw materials, the triazine modification is performed on the spinning base film, and then the inorganic coating liquid is used for coating, so that the mechanical strength and the heat-resistant stability of the battery diaphragm are effectively improved, the ionic conductivity is also improved, and the charging and discharging efficiency of the lithium battery is improved.