31results about How to "Easy to achieve large-scale continuous production" patented technology

The invention provides a method for preparing an in-situ toughened polypropylene alloy. In-situ grafting of high vinyl polybutadiene on polypropylene molecular chains by reactive extrusion method improves the interfacial compatibility between polypropylene and high vinyl polybutadiene. Propylene alloy prepared by reactive melt blending has the advantages of good compatibility, uniform dispersed phase and good toughening effect. The preparation method of the polypropylene alloy is simple, has no pollution to the environment, and is easy to realize large-scale continuous production. The polypropylene alloy prepared by the invention can be used in the fields of medical equipment, food packaging, pharmaceutical packaging, etc., can replace TPV thermoplastic elastomer to a certain extent, and reduce production costs. Using in-situ toughened polypropylene alloy, the notched impact strength of the product exceeds 75kJ / m2, the elongation at break exceeds 700%, and the tensile strength remains basically unchanged.

The invention discloses a medicinal low-temperature-resistant toughening anti-gamma ray impact-resistant transparent polypropylene material and a preparation method thereof. The medicinal low-temperature-resistant toughening anti-gamma ray impact-resistant transparent polypropylene material is prepared by completely mixing a base material, a flexibilizer, a gamma shielding auxiliary agent, a transparent nucleating agent, an antioxidant, a lubricant, a brightening agent and a molecular weight regulator according to the proportion, wherein homopolymerized polypropylene serves as the base material. An ethylene-octylene-propylene ternary random copolymer is adopted, so the medicinal low-temperature-resistant toughening anti-gamma ray impact-resistant transparent polypropylene material has excellent toughness and impact resistance and low-temperature resistance, is transparent, and fundamentally solves the problem that a medicinal polypropylene material is not transparent. A reactive type hindered amine stabilizing agent is grafted on a polypropylene molecular chain by a reaction extrusion method, so the gamma ray resistance is improved. After the medicinal polypropylene material prepared by the method is subjected to 25-kilojoule gamma irradiation, the yellowing index is less than 1; and then a moulding part is placed in a 70-DEG C baking oven for 8 weeks, the yellowing index is 3, the comprehensive mechanical property is reduced by 5 percent, and the transparency maintains over 90 percent.

The invention discloses an environment-friendly bamboo-plastic automobile instrument and a manufacturing method thereof. The environment-friendly bamboo-plastic automobile instrument comprises the following components in parts by weight: 100 parts of polypropylene, 20-30 parts of polyolefin elastomer, 20-40 parts of bamboo fibers and 0.4-0.8 part of a modifying agent. The environment-friendly bamboo-plastic automobile instrument disclosed by the invention is good in forming processability and mechanical performances. According to the environment-friendly bamboo-plastic automobile instrument and the manufacturing method thereof, the pure natural bamboo fibers are used as materials for reducing the using amount of the plastic material, so that the environment-friendly bamboo-plastic automobile instrument is green and environment-friendly; moreover, the manufacturing method is simple and easy to realize large-scale continuous production. The bamboo fibers are added, so that the environment-friendly bamboo-plastic automobile instrument has excellent antibacterial performances.