49results about How to "Increased biodegradation rate" patented technology

The invention relates to a high-temperature biologically-soluble ceramic fiber and a preparation method thereof. According to a technical scheme, the method comprises the following steps of: uniformly mixing 10-30 percent by weight of wollastonite powder or 15-40 percent by weight of dolomite powder, 10-30 percent by weight of talc powder or 8-30 percent by weight of forsterite powder, 40-70 percent by weight of quartz sand powder and 5-20 percent by weight of industrial sodium carbonate serving as raw materials; putting a mixture into a furnace, heating to 1,450-1,700 DEG C, melting, forming a fiber by blowing with compressed air of 0.2-0.5 MPa or forming a fiber by directly performing thread throwing to obtain calcium-magnesium-silicon ceramic cellucotton, putting into nitric acid or hydrochloric acid of which the concentration is 0.5-3 mol / L, heating to 70-90 DEG C, preserving heat for 3-5 hours, and washing with water till the pH value of water washing waste water is 6-7; and thermally treating under a nitrogen atmosphere at the temperature of 800-1,050 DEG C for 2-6 hours to obtain the high-temperature biologically-soluble ceramic fiber. The high-temperature biologically-soluble ceramic fiber has the characteristics of low melting temperature, easiness for operating a fiber forming process, low production cost and the like; and a product has high using temperature and high biological degradation rate.

The invention discloses a PLGA and polydioxanone compound fiber, a preparation method, an application and a surgical suture. In the compound fiber, the PLGA fiber is a core layer of the compound fiber, and the polydioxanone is a surface layer of the compound fiber. The preparation method comprises the following steps: respectively obtaining slices of PLGA and slices of polydioxanone; carrying outcompound spinning on the slices of PLGA and the slices of polydioxanone, so that the PLGA is in the core layer of the compound fiber, and the polydioxanone wraps the PLGA to form the surface layer ofthe compound fiber to obtain the PLGA and polydioxanone compound fiber. The compound fiber can be used for the surgical suture. The surgical suture is prepared from the compound fiber. The tensile strength of the compound fiber ranges from 4.6 CN / dtex-5.0 CN / dtex, the elongation at break is 30%-40%, the requirements of surgical sutures can be met, and meanwhile, the cost is low.

Disclosed are polylactide and polydioxanone composite fiber, its preparation method, application and surgical suture. In the composite fiber, the polylactide fiber is the core layer of the composite fiber, and polydioxanone is the skin layer of the composite fiber. The preparation method comprises: obtaining polylactide slices and polydioxanone slices respectively; performing composite spinning on the polylactide slices and polydioxanone slices, so that the polylactide is in the composite fiber The core layer, and the polydioxanone wraps the polylactide to form the skin layer of the composite fiber, and obtains the composite fiber of polylactide and polyglycolide. The composite fiber can be used for surgical sutures. The surgical suture is prepared via the composite fiber. The value range of the tensile strength of the composite fiber is 4.0CN / dtex-5.2CN / dtex, and the value range of the elongation at break is 20%-30%, which can meet the requirements of surgical sutures and is low in cost.