92results about How to "Good toughness balance" patented technology

The present invention discloses a large hollow container blow molding material, which comprises the following raw materials, by weight, 99.9-100.0 parts of an ethylene hexene copolymerization polyethylene base resin, 0.05-0.10 part of an antioxidant, 0.07-0.12 part of a co-antioxidant, and 0.03-0.05 part of a slip agent. The present invention further discloses a preparation method for the large hollow container blow molding material. The large hollow container blow molding material has characteristics of low fusion index, large molecule weight, high strength, and the like, and is suitable for blowing of large size containers, wherein the product has prominent rigidity and toughness balancing capacity, creep resistance, excellent ESCR and good chemical resistance.

The invention relates to a multimodal polyethylene pipe resin composition and a preparation method and application thereof. The composition comprises component A, component B and component C, wherein the component A is an ethylene homopolymer, the component B is an ethylene copolymer formed through copolymerization of ethylene and alpha-alkene and has an average molecular weight greater than that of the component A, and the component C is an ethylene copolymer formed through copolymerization of ethylene and alpha-alkene and has an average molecular weight greater than that of the component B; the composition has density of 0.935 to 0.945 g/cm<3> and MFR5.0 of 0.1 to 0.5 g/10 min, and the content of comonomers is 0.2 to 0.7% by mol; each component has narrow molecular weight distribution, and Mw/Mn is equal to or less than 5. A pipe prepared from the polyethylene composition has excellent pressure resistance, and time to failure of the pipe is greater than 500 h when the pipe is tested both under the conditions of a temperature of 20 DEG C and circumferential stress of 13.9 MPa and under the conditions of a temperature of 80 DEG C and circumferential stress of 5.6 MPa.

The invention is a low-smell rigid-tough high-performance polypropylene composite material and a preparation method thereof. The composite material of the invention belongs to a polypropylene composition without chemical post-processing. The composite material of the invention comprises the following raw materials by weight: 60-85 parts of polypropylene, 14-15 parts of toughening agents, 5-30 parts of active mineral fillers, 0.5-3 parts of composite smell inhibitors, and 0.1-2 parts of routine additives. By using low-smell rigid-tough balanced basic resin, through filling of wollastonite whiskers and compounding, matching and optimization of various smell adsorbents, the prepared polypropylene composite material has less smell and good balance between rigidity and toughness. Wollastonite whiskers are added in a mode of lateral feeding, which avoids the damage of the wollastonite long-needle shape caused by screw strong shearing, and thus the prepared polypropylene composite material not only has increased rigidity, but also has basically non-influenced toughness. The preparation process is simple, and the production cost is low. The composite material is suitable for the manufacturing of automobile bumpers, instrument panels, engine fans, washing machine inner drums, and refrigerator drawers.

The invention discloses a high-flow high-impact transparent polypropylene material produced by adopting a hydrogen regulation method. The ethylene content is 3.0-4.0%, the melt flow rate is larger than or equal to 35g/10min, the haze is less than 9%, and the notch impact strength of a simply supported beam is 6.0-6.5KJ/m<2>. The invention also discloses a method for producing the high-flow high-impact transparent polypropylene material by adopting the hydrogen regulation method. The polypropylene material is high in transparency, good in glossiness, non-yellowed, odor-free and good in impact and can be used for replacing high-flow high-impact transparent polypropylene produced by a degradation method.

The invention discloses a polypropylene composite material capable of realizing light weight and with low linear expansion coefficient and a preparation method thereof. The polypropylene composite material consists of the following raw materials in percentage by weight: 68-86% of polypropylene, 5-15% of whiskers, 6-10% of flexibilizer, 0.5-2% of efficient nucleating agent, 1-3% of compatilizer, 0.1-1% of antioxidant and 0.1-2% of other additives. In the invention, by adding the efficient nucleating agent and a few whiskers, the linear expansion coefficient of the polypropylene material can be effectively reduced while the material is endowed with the isotropy character in the case of relatively low density of the composite material. The polypropylene composite material disclosed by the invention has excellent rigid-rough balance and can be widely applied to the fields such as automobile interior and exterior trim to realize light weight.

The invention discloses a modified polypropylene material with high adhesion. The polypropylene material comprises the following raw materials in parts by weight: 60-80 parts of polypropylene resin, 10-30 parts of modified inorganic fillers, 4-8 parts of functional resin, 1-2 parts of epoxy resin, 0.5-1 part of a functional agent, 0.1-0.3 part of a nucleating agent, 0.1-1.0 part of an antioxidant and 0.1-1.0 part of a processing agent. In the modified polypropylene material, universal polypropylene is used as a basic material, so that the polarity of the polypropylene material is greatly improved by adopting a manner of adding the specific functional resin, epoxy resin, a functional agent and modified inorganic fillers and adjusting the ratio of the raw materials, therefore, the material has excellent surface adhesion and can be directly sprayed.

The invention provides a low-density low-shrinkage high-gloss polypropylene compound as well as a preparation method and a product thereof. The compound is prepared from the following components in parts by weight: 14 to 40 percent of homo-polypropylene, 15 to 40 percent of block co-polypropylene, 10 to 35 percent of toughening agent, 5 to 45 percent of inorganic filler, 0.05 to 0.5 percent of nucleating agent, 0.1 to 0.5 percent of coupling agent and 0.1 to 0.4 percent of antioxidant. According to the polypropylene composite, through the toughening agent, the shrinkage of the product can be greatly reduced, the density is lower, the shrinkage rate of the polypropylene composite material can be reduced to be close to that of ABS resin by only adding a very small amount of inorganic filler, and meanwhile, very high glossiness and relatively low density are maintained. The low-density low-shrinkage high-gloss polypropylene compound can be used for manufacturing various plastic products, and is particularly suitable for manufacturing products such as automobile plastic products or household appliance shells.

The invention relates to a full biodegradable mulch material for crops in an irrigated area and a preparation method and application of the full biodegradable mulch material. The material is preparedfrom poly terephthalic acid-adipic acid-butyl glycol ester, polyethylene furandicarboxylate ester, an aliphatic carboxylic acid zinc compound, a compatibilizer, a filler, an antioxidant and an ultraviolet absorber. The full biodegradable mulch film material has the advantages that PEF with stronger rigidity is used for performing rigidity enhancement and modification on PBAT under the action of the compatibilizer, thereby improving the rigidity of the PBAT and improving the rigidity and toughness balance of the PBAT. In addition, after the aliphatic carboxylic acid zinc compound is added, thephenomenon disappears that modified materials of PBAT and PEF adhere to equipment during membrane blowing processing, the blow-molded mulch has good opening performance, the mechanical properties of the modified material are not affected, and the cost can be greatly reduced through the cooperative use of the inorganic filler; the full biodegradable mulch material has simple processing conditions,excellent mechanical properties, low cost and a good development prospect.

The invention provides a modified polypropylene recycled material and a preparation method of the modified polypropylene recycled material. 30 to 75 parts of polypropylene recycled materials, 10 to 30 parts of polypropylene, 5 to 15 parts of polypropylene grafted acrylic acid, 10 to 25 parts of alkali-free glass fibers, 0.2 to 1 part of an antioxidant, and 0.5 to 2 parts of 2,5-dimethyl-2,5-bis(tert butyl peroxy) hexane are mixed, and subjected to extrusion pelletization to manufacture the modified polypropylene recycled material. According to the invention, the polypropylene grafted acrylic acid is added in the polypropylene recycled materials to introduce strong polar reactive groups, so that the material has high polarity and reactivity, and the compatibility of the polypropylene and fibers are greatly improved; furthermore, 2,5-dimethyl-2,5-bis(tert butyl peroxy) hexane is combined to improve the strength, cohesion and dispersion properties of the material, therefore, the modified polypropylene recycled material has good dispersion and compatibility and excellent rigid-tough balance.

The invention provides an inorganic nanomaterial toughened HDPE (high-density polyethylene) double-wall corrugated pipe composite masterbatch and a preparation method thereof. The masterbatch comprises 100 parts of nano calcium carbonate, 6-12 parts of nano titanium dioxide, 5-8 parts of PP (polypropylene) wax, 12-18 parts of HDPE and 6-10 parts of UHMW-PE6 (ultrahigh molecular weight polyethylene-polyethylene 6). According to the technical scheme, preheating drying is implemented, the nano calcium carbonate and rutile nano titanium dioxide are too large in specific surface areas, and thus powder artesian change can be caused. Maleic anhydride grafted HDPE and UHMW-PE are wrapped by nano powder, and preheating drying is a mode of technical innovation of nano calcium carbonate and rutile nanometer titanium dioxide. A conventional mechanical mode that external heat or friction heat of a stirrer and an internal mixer is conducted through convection or conduction, the time is long, the energy consumption is high,, the yield is low, and serious dust pollution can be caused. Most importantly, material moisture cannot be completely dried out, material heat is not uniform, and a material can be coked inside and unripe inside. By adopting the masterbatch, techniques of toughening and rigidity reduction of organic materials are effectively solved, the cost can be reduced, and materials are all localized.

The invention relates to the technical field of fine chemical engineering, in particular to a high-strength high-tenacity high-conductivity graphene membrane and a preparation method thereof. The method comprises the following steps: mixing a few rare earth metal ions, macromolecules and graphene oxide to prepare uniform hydrosol, pouring, air drying and membrane forming, and then enabling the hydrosol to be successively subjected to the steps of reduction, cleaning and drying to obtain the graphene membrane. Three interactions are simultaneously constructed, comprising a coordinate bond between the graphene oxide and rare earth ions, a hydrogen bond between the graphene oxide and the macromolecules and pi-pi action between the graphene oxide and the macromolecules, so that the prepared modified graphene membrane has high strength, high tenacity and excellent conductivity simultaneously. According to the method, the raw materials are cheap, the operation is simple, and the method is suitable for large-scale production and has a good industrial production foundation and a broad application prospect.

The invention discloses a toughening polypropylene material, comprising the following components in parts by weight: 100 parts of homo-polypropylene, 0.1-10 parts of polyethylene, 0.05-0.2 part of nucleating agent, 0.04-0.3 part of antioxygen, and 0.01-0.04 part of organic peroxide. The invention also discloses a preparation method of the toughening polypropylene material, and the preparation method includes the following steps: adding homo-polypropylene, polyethylene, a nucleating agent, an antioxygen and an organic peroxide into a high speed mixer for mixing, and conducting melting blendingextruding pelletizing on the uniformly mixed premix by a twin screw extruder, so as to obtain the final product. According to the invention, a low proportion of polyethylene is added into the formulacomponents and is used as a toughening agent of polypropylene, thereby realizing impact modification of polypropylene, refining grain size of polypropylene crystal, increasing impact resistance of thepolypropylene material, enhancing low-temperature resistance, and decreasing the melting point of the polypropylene material, decreasing the processing temperature and correspondingly reducing energyconsumption.

The invention discloses a medium-alkali glass fiber reinforced regenerated polypropylene composite material, which comprises the following components in parts by weight: 70-90 parts of polypropylene,10-30 parts of medium-alkali glass fibers and 0.5-3 parts of a stiffening nucleating agent. According to the invention, the regenerated polypropylene material is synergistically modified by the medium-alkali glass fiber with good toughness and low cost and the stiffening nucleating agent, and the prepared glass fiber reinforced regenerated polypropylene material has an excellent rigidity-toughnessbalanced performance, and can be used in reinforcing material parts needing nailing and bending. Meanwhile, the invention further discloses a preparation method and application of the medium-alkali glass fiber reinforced regenerated polypropylene composite material.

The invention discloses an impact-resistant, low-temperature-resistant and high-transparency polypropylene composition which comprises the following components in parts by weight: 100 parts of polypropylene random copolymer, 0.001-0.2 parts of a main antioxidant, 0.001-0.2 parts of an auxiliary antioxidant, 0.001-0.2 parts of a nucleating agent, 0.001-0.2 parts of an acid absorbent, 3-20 parts ofpolypropylene- ethylene/propylene block copolymer and 3-40 parts of a vinyl elastomer. The polypropylene composition disclosed by the invention has the characteristics of excellent rigidity and toughness balance, high transparency, excellent low-temperature toughness and the like, overcomes the defects of low rigidity, poor low-temperature toughness and the like of the current transparent polypropylene, and can enable the high-transparency polypropylene to meet the use requirements of an environment with the temperature of -20 DEG C or below.

The invention provides an alkali-free glass fiber modified polypropylene recycling material and a preparation method of the alkali-free glass fiber modified polypropylene recycling material. The alkali-free glass fiber modified polypropylene recycling material is prepared from the following components by mixing, extruding and granulating: 30 to 75 parts of a polypropylene recycling material, 10 to 30 parts of polypropylene, 5 to 15 parts of polypropylene grafted maleic anhydride, 10 to 25 parts of alkali-free glass fiber, 0.2 to 1 part of an antioxygen and 0.5 to 2 parts of 2,5-dimethyl-2,5-bi(tert-butylperoxy)hexane. According to the alkali-free glass fiber modified polypropylene recycling material, the polypropylene grafted maleic anhydride is added into the polypropylene recycling material to introduce a strong-polarity reactive group, so that the material has high polarity and reactivity, and the compatibility of the polypropylene and the fibers is extremely improved; meanwhile, the 2,5-dimethyl-2,5-bi(tert-butylperoxy)hexane is combined so that the strength, adhesive force and dispersion performance of the material are improved; good dispersity, compatibility and excellent rigid-tough balance are obtained.

The invention discloses a glass fiber reinforced rigid-tough balance type polyester composition and a preparation method thereof. The polyester composition is prepared from 100 parts of polyester, 0.5-5 parts of isopropyl palmitate, 20-100 parts of glass fibers, 0.1-0.5 part of an antioxidant, 1-3 parts of a lubricating modifier and 0.1-0.2 part of a coupling agent through mixing and extrusion granulating. Isopropyl palmitat has the effects of preventing glass fibers from being exposed, improving processing fluidity, reducing screw torque and improving the surface finish of a product; meanwhile, the problem of layering of a composition system can be solved, and the mechanical properties, especially, impact resistance of the composition can be substantially improved; the prepared polyester composition is an engineering plastic with good rigid-tough balance.

The invention relates to a rigid-tough balanced blow molding material for a medium-sized hollow container. The rigid-tough balanced blow molding material is prepared from raw materials including ethylene-hexene copolymerized polyethylene resin, a main antioxidant, an auxiliary antioxidant and a release agent through extrusion granulation, wherein the density of the ethylene-hexene copolymerized polyethylene resin is 0.945-0.949 g/cm<3>, the melt flow index is 7.8-11.8 g/10min, the molecular weight distribution index is 4-6, and the weight-average molecular weight is 150000-250000; and the molar content of 1-hexene in the ethylene-hexene copolymerized polyethylene resin is 0.2 to 0.3 mol percent. The medium-sized hollow container blow molding material provided by the invention has excellent rigidity-toughness balance performance and has a wide application prospect.