30results about How to "Appropriate water absorption" patented technology

The invention relates to a degradable polyethylene modified material and a preparation method thereof. The degradable polyethylene modified material is mainly applied to the production of a disposable degradable plastic bag and is mainly prepared from high-density polyethylene, calcium carbonate, konjac glucomannan, corn starch and a foaming agent. Due to the water retentivity of the konjac glucomannan, the disposable degradable plastic bag prepared from the degradable polyethylene modified material can be maintained in a relative drying state, so that the deterioration and the smelliness of food wastes contained in the disposable degradable plastic bag are difficult to occur. Meanwhile, the disposable degradable plastic bag has stronger toughness due to the addition of the konjac glucomannan, so that the disposable degradable plastic bag is difficult to break. The disposable degradable plastic bag is easy to degrade by taking the konjac glucomannan as a raw material, so that the environment pollution is avoided. The plastic bag commonly used in the existing market is prepared from a single plastic polymer, so that character writing or printing on the plastic bag cannot be carried out. The disposable degradable plastic bag provided by the invention is molded in a blowing manner by using a foaming technique, so that the character writing or the pattern printing on the disposable degradable plastic bag can be carried out.

The invention discloses a high-strength viscose fiber and its preparation method and application. The viscose fiber satisfies the following requirements: the fineness range is between 0.80 and 1.50D, the dry breaking strength is ≥3.15 cN / dtex, and the wet breaking strength is ≥1.70cN / dtex, the strength required to produce 5% elongation in a wet state is ≥0.60cN / dtex, and the dry elongation at break is 15.0-19.0%, suitable for textile high-twist fabrics or high-count yarn fabrics. The high-strength viscose fiber involved in the present invention is a new type of fiber achieved through technological innovation. It has an index system different from ordinary viscose fiber and modal fiber. Its products not only show the fiber characteristics of high strength and low elongation of modal fiber, It also shows a stronger skin-friendly property than cotton fiber, which can effectively replace the existing differentiated viscose fiber. While improving the processing performance of viscose fiber in the downstream process, it can also promote the development of new downstream textiles and industrial upgrading .

The invention discloses a preparation method for hydrocolloid dressing for promoting wound repairing, belonging to the technical field of medical dressing preparation. The method comprises the following steps: adding AFGF freeze-dried powder into a mixed solution of gelatin and carboxymethyl chitosan, thereby acquiring an AFGF-loaded transparent fluid; mixing with dissolving fluid of the matters including sodium carboxymethylcellulose, apple pectin, and the like; ultrasonically oscillating and then adding a cross-linking agent; performing cross-linking reaction under a certain temperature, acquiring reaction fluid and then mixing with resin viscous fluid, thereby acquiring a spinning solution; spinning by adopting a wet method, thereby acquiring an AFGF-loaded fiber; mixing with a pure cotton fiber and spinning to form cloth. According to the preparation method, the apple pectin is added, so that the water absorption lasting time of the dressing is increased and the gelling is quickened; styrene-isoprene segmented copolymer is added, so that the dressing viscidity and the peeling strength are effectively improved; hydrocolloid is prepared into weaved cloth and no film substrate is required, so that the problem of weak binding force between hydrocolloid and polymer film is solved and the wound repairing can be effectively promoted; the preparation method has wide application prospect.