10results about How to "Uniform cell structure" patented technology

The invention discloses light and flexible shape-memory constant-temperature phase-change foam and a preparation method thereof, and relates to the technical field of phase-change foam materials, the constant-temperature phase-change foam is prepared from the following components by weight: 100 parts of a packaging material, 50-200 parts of a phase-change material, 10-50 parts of a nucleating agent, 1-3 parts of a vulcanizing agent, and 1-2 parts of an auxiliary vulcanizing agent; 1-2 parts of an activator; 3-5 parts of zinc oxide, 1-3 parts of an anti-aging agent, 0.5-1 part of a scorch retarder and 0.5-2 parts of temperature change powder. The environment-friendly supercritical foaming technology and the fine material design are adopted, PCM leakage is effectively prevented, and environment friendliness and the energy storage effect are guaranteed. The material has excellent flexibility and shape memory characteristics, and is suitable for the fields of building heat preservation, electronic heat dissipation and the like. By optimizing the structure, efficient energy storage and low density are achieved, meanwhile, the temperature change powder is introduced to visually indicate the phase change process, and use convenience is improved.

The invention provides a composite insulating layer of a light superconducting cable and a preparation method and application of the composite insulating layer. The composite insulating layer is prepared from the following raw materials in parts by weight: 40-60 parts of fusible polytetrafluoroethylene, 30-50 parts of fluorinated ethylene propylene, 0.5-5 parts of an auxiliary agent, 1-5 parts of filler and 0.1-0.6 part of a nucleating agent. The composite insulating layer of the light superconducting cable has relatively high tensile strength, relatively low dielectric constant and dielectric loss factor, good mechanical property and high insulating strength; compared with the prior art, the composite insulation layer has the advantages of low average cell diameter and high cell density, which indicates that a uniform and fine cell structure is formed in the composite insulation layer, the overall density of the material can be effectively reduced, the insulation layer is light, and the composite insulation layer can be applied to preparation of light superconducting cables for medical equipment and realizes integrity and low loss of high-frequency signal transmission.

The invention discloses high-wear-resistance anti-aging thermoplastic elastomer foamed synthetic leather for automotive interiors and a preparation method thereof. The high-wear-resistance anti-aging thermoplastic elastomer foamed synthetic leather comprises bio-based diamine, bio-based binary acid, a functional comonomer, nano silicon dioxide fibers, superfine aluminum oxide fibers and other materials. The size effect and the high specific surface area of the nano silicon dioxide fibers and the superfine aluminum oxide fibers promote dispersity in a polyamide matrix, the hardness and rigidity of the material are improved, combination between the wear-resistant reinforcing agent and the anti-aging agent can be promoted, the nano silicon dioxide fibers and the superfine aluminum oxide fibers can form a grid structure, and the wear resistance of the material is improved. According to the synthetic leather material, the compactness of the synthetic leather material is enhanced, a barrier effect is provided, the wear resistance and the oxidation resistance of the synthetic leather are enhanced, the wear resistance and the aging resistance of the synthetic leather are enhanced, and the defect that the wear resistance and the aging resistance of the synthetic leather are insufficient in the prior art is overcome.

The present application relates to a kind of flame-retardant anti-shrinkage PBAT / bamboo powder supercritical foaming material and its preparation method, belong to degradable foaming material technical field.To solve the problem that PBAT system introduces bamboo powder and flame retardant causes foaming material cell structure uneven, density uneven, mechanical property drops, the present application provides a kind of flame-retardant anti-shrinkage PBAT / bamboo powder supercritical foaming material, component includes PBAT, bamboo powder and flame retardant, melt extrusion granulation after being placed in airtight container, fills in supercritical gas and is foamed to be prepared.The present application improves the anti-shrinkage and flame-retardant performance of PBAT foaming material by the addition of bamboo powder and flame retardant;By optimizing the injection amount of supercritical gas, foaming temperature and pressure, reduce foaming instability, effectively offset the adverse effects of bamboo powder and flame retardant on cell growth, obtain uniform cell structure and density, further improve the mechanical property of material.

The invention relates to the technical field of foaming materials, and discloses extruded micro-foamed high-density polyethylene and a preparation method and device thereof, and the preparation method comprises the following steps: step 1, mixing raw materials containing high-density polyethylene, expanded microspheres, a filler and an interfacial compatibilizer to obtain a premix; and 2, drying the premix, carrying out melt blending extrusion, and carrying out high-temperature steam-assisted foaming. According to the invention, the expanded microspheres are used as a foaming agent, the expanded microspheres are subjected to micro-foaming during melt extrusion through melt blending extrusion and high-temperature steam assisted foaming, and then are subjected to secondary foaming through high-temperature steam, so that the effect of the expanded microspheres as a light filler and the foaming agent is fully exerted, and a highly controllable and stable foaming effect is realized; a fine and uniform foam structure is obtained in the material, and the polyethylene foam material with relatively high mechanical property and foaming ratio is prepared.

The invention discloses flame-retardant polypropylene foamed plastic and a preparation method thereof, and relates to the technical field of thermal insulation materials. The preparation method of the flame-retardant polypropylene foamed plastic comprises the following steps: adding polypropylene and a functional additive into a charging barrel of an extruder according to the raw material ratio, and carrying out melt blending, extrusion and granulation to obtain microparticles; the microparticles, deionized water and a dispersing agent are added into a high-pressure reaction kettle, a physical foaming agent is introduced, heat preservation and pressure maintaining treatment is conducted, pressure relief, cooling and drying are conducted, and foamed beads are obtained; the foamed beads are subjected to water vapor molding and annealing shaping, and the flame-retardant polypropylene foamed plastic is obtained. The polypropylene foamed plastic prepared by the invention has the characteristics of flame retardance and excellent mechanical properties.

The application relates to the field of high polymer foaming materials, and particularly discloses a preparation method of elastic polypropylene composite foaming beads, the foaming beads and a molded product thereof, and the preparation method of the elastic polypropylene composite foaming beads comprises the following steps: uniformly mixing polypropylene resin, alpha-olefin elastomer and an additive, melt plasticizing, the ratio of the melt mass flow rate of the polypropylene resin to that of the alpha-olefin elastomer being 1:1-3, to obtain a composite; injecting a supercritical fluid, the supercritical fluid accounting for 0.5-3.0 wt% of the total mass of the composite, mixing and melting to obtain a mixed melt; gradiently cooling the mixed melt, then extruding, cutting and drying, then adding a dispersion medium and a foaming agent, impregnating through pressurization and heating, then releasing pressure to foam, washing, drying and curing, to obtain the foaming beads; the molded product is obtained by water vapor heating molding of the foaming beads; and the foaming beads have the advantages of good compatibility and dispersibility, good heat resistance, high expansion ratio, high elasticity and dimensional stability.

The invention relates to the field of physical foaming, in particular to C08J9 / 12. The method includes the following steps: crosslink the foaming matrix to obtain a plurality of crosslinked prefabricated products, add the crosslinked prefabricated products into a reaction reactor filled with polar liquid, add nitrogen for foaming, relieve pressure, and heat for foaming to obtain the foaming materials. In the polar liquid system, the inventor finds that the ratio of the distance between the adjacent crosslinked prefabricated products to the thickness of the prefabricated products as well as the difference between the melting temperature of the polymer and the temperature of the polar liquid need to be controlled to promote the adjacent prefabricated products in full contact with the polar liquid, and prefoaming can be carried out under the condition of low temperature difference, namely, at the low temperature of the polar liquid, to promote the foaming ratio and the cell uniformity.

The invention relates to the technical field of foaming materials, in particular to a polypropylene foaming material and a preparation method thereof. The polypropylene foaming material comprises the following components in parts by weight: 88-96.5 parts of polypropylene resin, 0.5-2 parts of a sensitizing agent, 2-5 parts of a nucleating agent and 1-5 parts of other auxiliary agents. The preparation method of the polypropylene foaming material comprises the following steps: S101, uniformly mixing polypropylene resin, a sensitizing agent, a nucleating agent and a compound additive according to a ratio to obtain a mixed material; s103, feeding the mixed material into an extruder, and carrying out extrusion granulation; s105, carrying out irradiation crosslinking on the extrudate obtained in the step S103; and S107, performing blow molding, extruding and foaming to obtain the polypropylene foaming material. The polypropylene foaming material is high in foaming ratio.

This application relates to the field of building insulation materials technology, specifically disclosing a method for preparing vitrified microcapsule insulation mortar based on phase change microcapsules. The method includes the following steps: dry mixing ZrO2 / ZnO / PDA multi-shell phase change microcapsules, phenolic resin foam-vitrified microsphere composite material, cement, cellulose ether, fly ash, polypropylene fiber, water-reducing agent, and redispersible latex powder for 25-30 seconds to obtain a preliminary mixture; adding water to the preliminary mixture and stirring for 60-90 seconds until homogeneous to obtain the vitrified microcapsule insulation mortar based on phase change microcapsules. The insulation mortar provided by this application exhibits excellent insulation performance and temperature regulation and energy storage capacity.