51results about How to "The preparation method has few steps" patented technology

The invention discloses a polyglycolic acid-polycaprolactone film, which consists of 5-15 parts of polyglycolic acid and 85-95 parts of polycaprolactone in parts by weight; 10 to 200 μm particles, the molecular weight of the polyglycolic acid is 9 to 110,000, the molecular weight of the polycaprolactone is 100,000 to 200,000, and the thickness of the polyglycolic acid-polycaprolactone film is 10 ~ 200 μm; the polyglycolic acid-polycaprolactone film of the present invention is a non-porous dense film in the early stage of implantation, which can isolate the postoperative tissue. Because polyglycolic acid has a faster degradation rate than polycaprolactone, it Micropores can be obtained with the degradation of polyglycolic acid after being implanted into the human body. On the one hand, the appearance of micropores accelerates the breaking and degradation of the material. On the other hand, the film after the appearance of micropores can still maintain the original shape, ensuring The effective isolation function of the film shortens the retention time of the film in the human body and reduces the risk of complications; the preparation method of the polyglycolic acid-polycaprolactone film of the present invention has fewer steps and fewer processes, and is easy to realize industrial production.

The invention discloses a splitting core column for synthesizing diamond and a preparation method thereof. The splitting core column for synthesizing the diamond comprises a core column tube, wherein a core column is arranged in the core column tube, a first core column piece is arranged on the upper end of the core column tube, and a second core column piece is arranged on the lower end of the core column tube. According to the splitting core column for synthesizing the diamond, different mixing ratios of peripheral materials to internal materials are adopted, and the weight ratio of catalysts of the peripheral materials is controlled to be higher than that of the core column by 4% to 8%, so as to effectively control the granularity of the peripheral materials, thereby reducing the growth rate of the peripheral materials, so that the whole core column for synthesis grows at uniform speed in the process that graphite is converted into the diamond, and the granularity of the synthesized diamond is uniform; the isostatic pressing granulation granularity range of the core column pieces and the core column tube and the isostatic pressing granulation granularity range of the core column are controlled, so that materials are uniformly fed into a die cavity during pressing, and the density of pressed products of the core column pieces, the core column tube and the core column is uniform, thereby guaranteeing the quality and the yield of the synthesized diamond.