97 results about "Polypropylene composites" patented technology

The application provides a display device, a halogen-free flame-retardant polypropylene composite material and a preparation method thereof, which comprises 60-78 parts of polypropylene, 10-15 parts of modified glass fiber, 10-20 parts of modified glass microsphere and 2-5 parts of antioxidant by weight; wherein the modified glass fiber comprises 80-90 parts of glass fiber and 10-20 parts of first modifier, the first modifier comprises long-chain amide, and the first modifier is grafted on the outer periphery of the glass fiber; the modified glass microsphere comprises 80-90 parts of glass microsphere and 10-20 parts of second modifier, the second modifier is grafted on the outer periphery of the glass microsphere, and the second modifier comprises at least one of DOPO and a derivative of DOPO.

This application discloses a polypropylene composite material, its preparation method, and its application, relating to the field of polymer materials technology. This application provides a polypropylene composite material comprising the following components in parts by weight: 40-95 parts PP resin, 1-5 parts silica gel adsorbent, 1-5 parts carbon nanotubes, and 1-20 parts filler; wherein the pore size of the silica gel adsorbent is D1, and the outer diameter (D50) of the carbon nanotubes is D2, with 0 ≤ D1 - D2 ≤ 17 nm. This application provides a polypropylene composite material that, through the synergistic effect of the silica gel adsorbent and carbon nanotubes, solves the material emission problem and forms a physically cross-linked structure in the system to achieve a low linear expansion coefficient and excellent scratch resistance.

The application discloses a polypropylene composite material and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polypropylene composite material with high impact strength, high transparency and excellent low-temperature toughness is prepared by using the first polypropylene with a certain melt index, the second polypropylene, a polypropylene-based elastomer toughening agent and a processing aid. The properties of the obtained polypropylene composite material are close to the level of transparent ABS material, and the polypropylene composite material has the advantages of low cost and food-grade application, is suitable for fields such as household appliances, medical devices and commodity packaging, and has a good market application prospect.

This invention discloses a sucrose-polypropylene composite hard carbon and its preparation method, belonging to the technical field of sodium-ion battery anode materials. The preparation method of the composite hard carbon includes using sucrose as a raw material, first preparing a precursor, mixing it with polypropylene, ball milling it, pre-oxidizing it at low temperature, and then carbonizing it at high temperature. The closed-pore volume of the material of this invention increases, the interlayer spacing expands, and the packing density of the material increases, thereby improving the energy density of the material. The reversible specific capacity of the hard carbon material of this invention can be increased from the initial 271 mAh g. ‑1 Increased to 387mAh.g ‑1 The capacity ratio in the low-voltage plateau region can be increased from 54% to 64%. Under optimal process conditions (M-SC:PP = 2:1, pre-oxidation at 330℃), the sucrose-polypropylene composite hard carbon prepared at 100 mA g... ‑1 It still retains 240mAh after 300 cycles. ‑1 Its capacity is far higher than that of directly calcined sucrose-based hard carbon materials (100 mAh / g). ‑1 The material exhibits good cycle stability and rate performance.

The application relates to a modified high-crystalline polypropylene composite material and a master batch preparation process thereof, and belongs to the technical field of polypropylene composite material modification, which comprises the following components in parts by weight: high-crystalline polypropylene resin 70-85 parts, composite nucleating agent 0.2-0.6 parts, organic-inorganic hybrid filler 8-15 parts, ethylene-octene copolymer grafted acrylate 4-9 parts, polyolefin elastomer grafted maleic anhydride 3-8 parts, composite antioxidant 0.4-0.9 parts and composite lubricant 0.3-0.6 parts. The new alpha nucleating agent compound system and the organic-inorganic hybrid filler are used in cooperation, the crystallinity and low-temperature impact resistance of the polypropylene are significantly improved, and the segmented pre-dispersion-melt blending process is used for master batch preparation, so that the components are uniformly dispersed, and the master batch quality stability is improved.

This invention relates to the field of material performance analysis, specifically a method for synergistic optimization of the performance of high-pressure polypropylene composites. The method includes: determining a combination of process parameters based on the gradient ratio of modified conductive carbon black and polar monomer-grafted polypropylene, combined with multi-scale control of agglomerate premixing and melt blending indices, and synergistic optimization of segmented temperature control parameters and gradient temperature-controlled crystallization parameters. This method solves the technical problem that adding conductive fillers and compatibility modifiers in a fixed ratio, coupled with a lack of synergistic linkage between process parameters in the premixing, melting, and crystallization stages, easily leads to uneven dispersion of modified components and insufficient consistency in the performance of the prepared composite materials. It achieves significant improvement in the process stability of high-pressure polypropylene composites by synergistically optimizing multi-scale process parameters such as agglomerate premixing, melt blending, and segmented temperature control to dynamically match the gradient distribution of modified components with the thermal-fluid-structural evolution process.

This invention relates to the field of modified plastics technology, specifically to a polypropylene composite material, its preparation method, and its application. The invention provides a polypropylene composite material comprising the following components in parts by weight: 4-26 parts polypropylene, 6-13 parts polyethylene, 30-50 parts spherical metal filler, 30-50 parts flake carbon filler, 0.4-1.2 parts antioxidant for polypropylene, 0.4-1.2 parts antioxidant for polyethylene, 0.2-0.6 parts metal passivator, and 0.3-1 part epoxy resin; the melt flow rate of the polypropylene is 10-100 g / 10 min (230℃, 2.16 kg), and the melt flow rate of the polyethylene is 1-3 g / 10 min (190℃, 2.16 kg); the surface of the spherical metal filler is coated with the polyethylene. This composite material solves the problem of difficult processing of high-filler systems and also possesses excellent thermo-oxidative aging properties.

This invention belongs to the field of flame retardant polymer materials, and specifically relates to a phytic acid-modified piperazine pyrophosphate and zinc borate synergistic flame retardant polypropylene and its preparation method. The composition by mass percentage is: polypropylene (PP): 73-75%; phytic acid-modified piperazine pyrophosphate (PM@PAPP): 24-26%; zinc borate: 0.5-2%. This invention uses piperazine pyrophosphate as the core and, through a liquid-phase supramolecular self-assembly process, in-situ coats the surface with a supramolecular network formed by phytic acid and melamine to prepare a core-shell structured phytic acid-modified piperazine pyrophosphate. This core-shell structure is then compounded with zinc borate, and melt-blended and hot-pressed to obtain a flame-retardant polypropylene composite material. This composite material improves the compatibility between the material and the flame retardant, inhibits the release of toxic fumes, and forms a continuous, dense char layer, enhancing the material's thermal stability and fire safety performance. It solves the problems of traditional flame retardants, such as large dosage requirements, easy migration, insufficient foaming, and poor smoke suppression effects.

The application discloses a polypropylene composite material and a preparation method and application thereof, and relates to the technical field of high polymer materials. The polypropylene composite material comprises the following components in parts by weight: 30-65 parts of block copolymerized polypropylene resin, 5-20 parts of random copolymerized polypropylene resin, and 25-45 parts of glass fiber; the elongation at break of the block copolymerized polypropylene resin and the random copolymerized polypropylene resin is greater than or equal to 100%, and the combustible content of the glass fiber is less than or equal to 0.1%.

The application provides wear-resistant and scratch-resistant high-hardness nano-alumina modified polypropylene composite veneer and relates to the field of high polymer composite materials, which comprises a veneer main body, a wear-resistant and scratch-resistant surface layer, a reinforced support middle layer, an elastic fitting inner layer and a sticking auxiliary assembly; the veneer main body adopts a multilayer composite structure, and the veneer main body is sequentially provided with the wear-resistant and scratch-resistant surface layer, the reinforced support middle layer and the elastic fitting inner layer from outside to inside; the wear-resistant and scratch-resistant surface layer, the reinforced support middle layer and the elastic fitting inner layer are tightly connected into an integrated whole through a composite forming process; the wear-resistant and scratch-resistant surface layer is a nano-alumina modified polypropylene layer; the reinforced support middle layer is a glass fiber reinforced polypropylene layer; and the elastic fitting inner layer is a modified polypropylene elastomer layer, which improves the sticking efficiency of the whole veneer and solves the problem that the existing composite veneer bubbles need to be removed point by point by workers through scrapers, which is complicated and time-consuming.

This invention discloses a high-strength carbon fiber modified plastic and its preparation method. By weight, it comprises the following raw materials: 90-100 parts polypropylene, 8-12 parts modified carbon fiber, 3-5 parts maleic anhydride-grafted polypropylene, 2-4 parts toughening agent, 0.7-1.1 parts antioxidant, and 0.5-0.8 parts lubricant. This high-strength carbon fiber modified plastic achieves its goal by subjecting the carbon fiber surface to specific multi-step modification, sequentially introducing an aminosilane coupling layer, a gallic acid amide bond linking layer, and an itaconic acid active double bond functional layer. This forms an inside-out covalently bonded interface system, transforming the simple physical contact between the carbon fiber and the polypropylene matrix into a chemical bond. Furthermore, by combining maleic anhydride-grafted polypropylene as an interface compatibilizer and ethylene-octene copolymer as a toughening agent, the formulation design ensures both high strength and material toughness, resulting in a high-strength carbon fiber modified polypropylene composite material with balanced mechanical properties.

This invention belongs to the field of polypropylene composite material preparation technology, specifically relating to a high-temperature and high-humidity flame-retardant carbon fiber reinforced polypropylene material and its preparation method. The high-temperature and high-humidity flame-retardant carbon fiber reinforced polypropylene material provided by this invention is made from the following raw materials in parts by weight: 41-61 parts polypropylene resin, 10-30 parts modified carbon fiber, 20-28 parts modified flame retardant, 3-5 parts compatibilizer, and 0.5-2 parts antioxidant. This invention, through dual modification of the carbon fiber and flame retardant, combines excellent interface and extreme dispersion to jointly construct a stable and robust composite material system, achieving a high degree of unity in the material's flame retardancy, mechanical properties, and high-temperature and high-humidity resistance. Therefore, the carbon fiber reinforced polypropylene material provided by this invention not only possesses excellent halogen-free flame-retardant properties but also maintains stable performance over a long period in high-temperature and high-humidity environments, greatly meeting the application requirements of harsh high-temperature and high-humidity environments.

The application discloses a kind of based on graphene modified polypropylene composite material and preparation method thereof, by weight parts, including the following raw materials: polypropylene 90-100 parts, maleic anhydride grafting polypropylene 3-5 parts, modified graphene 1.5-2.5 parts, composite nucleating agent 0.2-0.3 parts, antioxidant 0.3-0.6 parts, lubricant 0.3-0.5 parts.The based on graphene modified polypropylene composite material, surface functionalized graphene is prepared using a specific method, and it is combined with efficient composite nucleating agent synergy, again combining master batch method two-step melt blending process, using modified graphene on polypropylene heterogeneous nucleation effect, significantly improve the crystallization performance of material, finally prepared polypropylene composite material forms small uniform alpha crystal type microstructure, so that in mechanical property, thermal performance and dimensional stability obtain comprehensive promotion.

This invention discloses a β-crystalline polypropylene composite material and its preparation method. The β-crystalline polypropylene composite material includes the following raw materials: polypropylene and polythiophene. By adding polythiophene to polypropylene, this invention can induce polypropylene to form more β-crystalline polypropylene. Polythiophene has high induction efficiency and low addition amount, which solves the problem of poor nucleation induction efficiency of polymer-type nucleating agents.

This invention relates to the field of high-performance polypropylene materials technology, specifically to a biodegradable foamed polypropylene composite material and its preparation method. The invention aims to solve the problem of the inability to simultaneously achieve both mechanical and degradation performance in existing polypropylene composite materials. This invention uses modified polypropylene obtained by modifying polypropylene materials with high-density polyethylene and low-density polyethylene as the matrix material; maleic anhydride-grafted polypropylene as a compatibilizer; modified nano-silica; degradation aids obtained by melt extrusion of PBAT, ferric stearate, and benzophenone; and sulfonated lignin. Finally, a stepwise melt blending process is employed, combined with a dual foaming technology of chemical foaming agent and supercritical carbon dioxide, to obtain a polypropylene-based composite material. The resulting material exhibits excellent mechanical properties while possessing a highly efficient and controllable degradation rate, achieving a synergistic improvement in both mechanical and degradation performance.

This invention relates to the field of polymer materials technology, specifically disclosing a polypropylene composite material, a polypropylene composite film, and a method for preparing the same. The invention provides a polypropylene composite material comprising polypropylene, 1,3:2,4-di-p-methylbenzyl sorbitol, and other additives. The 1,3:2,4-di-p-methylbenzyl sorbitol used as an organic nucleating agent can effectively regulate and improve the microstructure of polypropylene, significantly increasing its crystallinity and reducing density defects in the resulting polypropylene film. This provides a reliable material basis for preparing polypropylene composite films with high electrical insulation properties, excellent high-temperature resistance, and long-term high-temperature cycling stability, solving the problem of insufficient long-term stable cycling performance in existing polypropylene films due to low energy storage density and poor high-temperature resistance.

This invention discloses a mixing device for preparing antibacterial and flame-retardant polypropylene composite films and its raw materials, relating to the field of polymer materials technology. It includes: a mixing tank, a stirring mechanism disposed on the mixing tank for stirring the polypropylene composite film raw materials, and a conveying mechanism disposed on the mixing tank for conveying the bottom of the mixing tank away from the stirring mechanism. This mixing device for preparing antibacterial and flame-retardant polypropylene composite films utilizes the stirring action of the stirring blades of the stirring mechanism and the dispersing action of the spreading frame, along with the conveying mechanism to transport the raw materials from the bottom of the mixing tank to the stirring mechanism. This ensures that the raw materials are fully dispersed and mixed within the mixing tank, greatly improving the mixing uniformity and ensuring the stable quality and uniform performance of the prepared antibacterial and flame-retardant polypropylene composite film. The conveying mechanism also promptly transports the raw materials from the bottom of the mixing tank away from the stirring mechanism to the stirring mechanism, preventing the accumulation of raw materials at the bottom.

This invention belongs to the field of polymer materials technology, specifically relating to a low-gloss polypropylene composite material and its preparation method. The low-gloss polypropylene composite material is prepared from the following components in parts by weight: 53.4-89.3 parts polypropylene, 5-30 parts inorganic filler, 2-10 parts POE, 3-5 parts ultra-high molecular weight polyethylene, 0.2-0.6 parts nucleating agent, 0.2-0.4 parts antioxidant, and 0.3-0.6 parts processing aid. This invention improves the melt strength of the material by adding ultra-high molecular weight PE, and simultaneously increases the crystallization rate by adding alkyl carboxylate nucleating agents, thereby preventing the later-stage surface texture "collapse" and better replicating the texture depth and pattern, thus further reducing the product's gloss.

The application discloses a kind of polypropylene composite material and preparation method and application thereof, belong to high polymer engineering plastics technical field;The polypropylene composite material provided by the application includes the following components by mass fraction: polypropylene resin 48-78 parts, styrene elastomer 3-42 parts, maleic anhydride graft copolymer 3-22 parts;In the styrene elastomer, the mass percentage of styrene is greater than or equal to 18%;The maleic anhydride graft copolymer includes at least one of maleic anhydride grafted polypropylene, maleic anhydride grafted ethylene-octene copolymer.The polypropylene composite material provided by the application has good light transmittance and higher welding strength;And the preparation method provided by the application is simple, which is beneficial to actual production.

The application discloses a kind of polypropylene composite material and preparation method and application thereof, belong to high polymer material technical field, the polypropylene composite material, including the following weight parts of component:100 parts polypropylene resin, 14~32 parts SAN resin, 4~21 parts cycloolefin polymer, 9~16 parts hollow glass microsphere, 0.08~1.1 parts glycidyl methacrylate graft polypropylene, 0.04~0.32 parts nucleating agent.The polypropylene resin of the application is as matrix, under the joint action of SAN resin, cycloolefin polymer, hollow glass microsphere, PP-g-GMA, nucleating agent, significantly improve the coating adhesion and tensile strength of polypropylene material, the polypropylene composite material is very suitable for preparing automobile parts, especially suitable for preparing automobile bumper.

The present application relates to a kind of modified polypropylene composite material for medium voltage cable insulation and its preparation method and application, belong to wire and cable material technical field.The composite material is with polypropylene as matrix, by adding multiphase synergistic toughening agent and functionalized nano filler, and cooperate with composite voltage stabilizer, antioxidant and processing aid composition.The multiphase synergistic toughening agent is the complex system of hydrogenated styrene-butadiene-styrene block copolymer and polyolefin elastomer;The functionalized nano filler is the nano silicon dioxide modified by vinyl silane coupling agent.The present application is through the synergistic effect of multiphase synergistic toughening agent and functionalized nano filler, while significantly improving the toughness of polypropylene, scratch resistance and interface adhesion with shielding layer, maintain excellent electrical insulation and long-term electrical-thermal aging resistance, solve the contradiction of traditional toughening leading to electrical performance degradation, and material can be completely recycled, suitable for manufacturing environment-friendly medium voltage power cable insulation layer.

This invention provides anhydrous gypsum-polypropylene composite hollow board and its preparation method. The anhydrous gypsum-polypropylene composite hollow board comprises the following components by weight percentage: 30%-65% modified anhydrous gypsum powder, 30%-65% polypropylene resin, 1%-3% compatibilizer, 1%-3% lubricant, and 0.1%-0.3% antioxidant. The modified anhydrous gypsum powder is prepared by modifying hydroxylated anhydrous gypsum powder with a composite surface modifier formed by compounding long-chain fatty acids or their derivatives with a coupling agent. The anhydrous gypsum-polypropylene composite hollow board is prepared by a two-step method: first, a high-filler functional masterbatch is prepared, and then the hollow board is extruded. By modifying the anhydrous gypsum powder and combining it with the two-step preparation method, the problems of weak interfacial bonding between anhydrous gypsum and the polypropylene matrix and poor dispersibility with high filler content are solved, thus systematically improving the mechanical properties and processing performance of the composite hollow board.

This invention discloses a segmented micro-foamed, low-float fiber reinforced polypropylene composite material with gradient-coated glass fiber and its preparation method, belonging to the field of polymer composite material technology. The composite material comprises 60-70 parts PP resin, 30 parts gradient double-coated chopped glass fiber, 0.5-1.0 parts two-component chemical foaming agent, and appropriate additives. The gradient double-coated glass fiber consists of an inner interfacial compatibility layer and an outer rheological adaptability coating layer. The preparation method includes three steps: gradient glass fiber coating, mixing and granulation, and segmented injection molding. The segmented injection molding adopts a "high-pressure molding and foam suppression + instantaneous pressure release and foaming" control method, resulting in a gradient structure with a dense, bubble-free surface and uniform micropores inside. This invention does not rely on anti-float fiber masterbatch, fundamentally suppressing fiber floatation from both structural and process perspectives, achieving a balance between lightweight and high surface quality. It exhibits excellent mechanical properties and dimensional stability, is environmentally friendly and low-odor, and is specifically designed for appliance casings and structural components. It is cost-controllable, suitable for industrial mass production, and solves many pain points of existing technologies.

The application belongs to the technical field of high polymer materials, and specifically discloses a polypropylene composite material, which comprises the following components in parts by weight: 25-45 parts of polypropylene resin, 10-25 parts of ammonium polyphosphate, 10-20 parts of bamboo powder, 5-15 parts of DOPO or a derivative thereof, and 1-8 parts of PLA. The application precisely controls the acid source release temperature by wrapping the ammonium polyphosphate with the PLA and matches the temperature window of the DOPO gas source; meanwhile, the bamboo powder is used to catalyze the carbonization, so that the gas-solid dual-phase flame-retardant synergy is realized. The polypropylene composite material has the advantages of high efficient flame retardation, high mechanical property retention and environmental friendliness, and can be used for preparing household appliance shells or automobile interiors.