45results about How to "Good thermoplastic processability" patented technology

The invention provides a method for preparing high thermal conductivity and insulation 3D printing products by using waste aluminum-plastic packaging materials. Ultrafine powder, blended and extruded into 3D printing filaments, the unique process temperature conditions in the process of fused deposition molding 3D printing make the expandable graphite expand in situ, and release the intercalation agent in the confined space, so that The in-situ oxidation reaction occurs on the surface of aluminum metal, and at the same time, the high shear force in the fused deposition molding 3D printing process is used to realize the special orientation and network structure construction of two-dimensional nanomaterials, thereby preparing high-performance thermally conductive and insulating 3D printed products. The thermal conductivity of the 3D printed product prepared by the present invention is not less than 2.5W / mK, and the electrical conductivity is less than 10 ‑10 S / cm, the tensile strength is not less than 12Mpa.

The invention relates to a food freshness indicator card taking indicated CO2 as a characteristic gas and a manufacturing method of the food freshness indicator card. The manufacturing method comprises the following steps: firstly, crushing a polylactic acid sample, dissolving by chloroform, after heating in water bath, laying on a clean glass grinding tool through a tape-casting process, and drying to prepare a basal membrane; and dissolving bromothymol blue powder and methyl red powder in an ethanol solution, after stirring, uniformly mixing with polyethylene glycol and methylcellulose powder, laying on the basal membrane, drying to obtain the indicator card, independently packing the indicator card, and adding a drying agent into the indicator card for controlling the humidity surrounding the indicator card and improving the accuracy of discoloring generated after CO2 is absorbed by the indicator card. According to the manufacturing method, a self-made polylactic acid membrane is used as the indicator card basal membrane and is smooth in surface, uniform in texture and bright and translucent in appearance, and thus vision errors are furthest reduced. Due to invention and application of the freshness indicator card, consumers can purchase healthy and high-quality foods, and Chinese food safety is greatly improved.

The invention discloses a low-cost magnesium alloy with the high room-temperature plastic deformation and a preparation process thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises, by weight, 0.1%-0.9% of zinc, 0.1%-0.4% of calcium, 0-0.05% of manganese and the balance magnesium. The magnesium alloy does not contain rare earth elements or the Zr element and is low in alloy cost, an ingot of the magnesium alloy has good thermoplastic machining performance, large-rolling-reduction rolling with the rolling reduction being 80% at most in one pass can be achieved during hot rolling, and cracks in the surface are avoided. The ingot is subjected to thermoplastic machining and then annealing, the obtained magnesium alloy has a weak non-basal texture, the maximum density value of the magnesium alloy is not greater than 5, and the room-temperature elongation of the magnesium alloy is high and can reach 25%-40%.

The invention relates to an application of a polymer particle with chlorine on the surface as thermal reversible reactive filler which includes tertiary amine pendant group. The polymer particle with chlorine on the surface is prepared with vinyl monomer and chloric monomer through emulsion copolymerization, wherein the chloric monomer is chosen from chloro acetic acid vinyl ester and derivatives thereof, chloro acrylic ester and derivatives thereof, chloro vinyltoluene and derivatives thereof as well as chloro olefin. When linetype polymer material is filled with the reactive cross-linked polymer particle filler with chlorine on the surface, cross-linked polymer material for filling and reinforcing is obtained without other cross-linked agents, and the cross-linked polymer material can be heated and formed. Therefore, problems that permanent cross link in polymer material and products are difficult to process and utilize again caused by traditional reactive reinforcing filler are solved, and implementation art is simple.

The invention provides a method for preparing thermoplastic starch special for biodegradable plastic through laser modification. The method comprises the following steps: performing enzymolysis on starch granules by high-temperature-resistant alpha-amylase, further damaging a hydrogen bond in molecules in the microstructure of the starch granules by using laser, and introducing the starch modulesinto a block polymer during monomer block polymerization to obtain starch with high thermoplasticity. The thermoplastic starch can be widely applied to preparation of biodegradable plastic. The product obtained by the method has high quality and safety, the process limit in the field of starch modification is overcome, the preparation process is simple in operation, time-saving, labor-saving and easy in large-scale production, and the practical value is extremely high.