32results about How to "Reduce molecular gap" patented technology

The invention discloses an oil-resistant gastric-soluble type film coating premix auxiliary material and a preparation method thereof. The oil-resistant gastric-soluble type film coating premix auxiliary material is prepared from the following raw materials in parts by weight: 9-10 parts of HPMCE (medicinal hydroxypropyl methyl cellulose) 5, 14-15 parts of HPMCE 15, 15-16 parts of HPMCE 50, 20-22 parts of talcum powder, 9-12 parts of polyethylene glycol and 3-5 parts of pigment. The preparation method for the oil-resistant gastric-soluble type film coating premix auxiliary material comprises weighing, pre-mixing, crushing, preparing and spraying. The oil-resistant gastric-soluble type film coating premix auxiliary material prepared by the preparation method disclosed by the invention plays a moistureproof role on medicines such as extracts, successfully solves the problem of the seepage of coating films of the traditional Chinese medicines such as extracts due to damp and hot influence, prevents the medicines from being affected with damp and hardened, prevents the loss of efficacy, and has oil resistance; the preparation method for the oil-resistant gastric-soluble type film coating premix auxiliary material has the advantages of being simple to operate, convenient to prepare, high in production efficiency and low in energy consumption, and is suitable for large-scale factorial production.

The invention discloses a method for finishing cotton yarn with antibacterial organosilicon quaternary ammonium salt, which belongs to the technical field of textile chemistry. The method of the invention is to strengthen the adhesion density of the organosilicon quaternary ammonium salt to the cotton fiber and improve its antibacterial performance after finishing. The cotton yarn is impregnated with neutral glutamic acid solution, compounded organic silicon quaternary ammonium salt, and weak acid rinsing solution in sequence, and finally baked to complete the finishing, that is, the fiber is negatively charged by pretreatment with neutral 5% glutamic acid to improve For the electrical adhesion of positively charged organosilicon quaternary ammonium salts, use 2% compound quaternary ammonium salts to make it densely attached, then rinse with weak acid to remove glutamic acid, and bake and coke to attach glutamic acid to remove negative charges. After finishing, the adhesion speed, adhesion density and adhesion efficiency of cotton fiber to organic silicon antibacterial quaternary ammonium salt are improved, the antibacterial performance of cotton fabric after finishing is enhanced, and the appearance properties such as softness and moisture retention of finished cotton fabric are improved at the same time. The process is simple, the operation is convenient, the consumption is low and the efficiency is high, and it has application value for finishing cotton yarn for filtering bacteria, preventing bacteria, killing bacteria and killing viruses.

The invention discloses a high-toughness wear-resistant shock-absorbing cable for ships, which comprises a conductor, an insulating layer, a filling layer, a shielding layer, an armor layer and an outer sheath; the raw materials of the outer sheath include: butadiene rubber 50 ‑60 parts, EPDM rubber 20‑25 parts, chlorinated polyethylene 140B 15‑18 parts, high toughness and high heat insulation gel 8‑12 parts, sulfur powder 1‑1.5 parts, accelerator DM 1.4‑1.7 2.1-2.4 parts of accelerator TMTM, 5-7 parts of trioctyl trimellitate, 2-3.5 parts of tributyl citrate, 25-28 parts of barite powder, 17-20 parts of high wear-resistant carbon black, 12-15 parts of nano calcium carbonate, 7-10 parts of superfine talc, 6-9 parts of hard clay, 5-8 parts of kaolin, 2-4 parts of red phosphorus, 0.3-0.6 parts of NOBS, 0.5-1 parts of anti-aging agent RD parts, antioxidant RD 2.5‑4 parts.

The invention discloses a magnesium alloy refining crucible with improved purity and its application in the field of metal processing, in order to overcome the disadvantages in the prior art that the magnesium alloy is only in the preliminary processing state and the metal performance of the magnesium alloy is not up to standard, in order to overcome this defect The technical solution includes a refining crucible body with an elliptical cross-section, and the refining crucible body is provided with a feed inlet, a stirring and diverting device, and a cryogenic treatment chamber in sequence along the material supply direction, and the stirring and diverting device includes a circular cross-section The inner ring rotor and the circular gear driving the inner ring rotor, the inner ring rotor meshes with the circular gear, and the bottom end of the inner ring rotor has an arc-shaped notch, and an arc-shaped rotating plate is fixedly connected to the inside of the notch. Compared with the traditional refining crucible, the technical solution utilizes the circumferentially rotating inner ring rotor to perform hot rolling treatment on the magnesium alloy, which reduces the molecular gap inside the magnesium alloy and improves the metal properties of the magnesium alloy.

The invention discloses a full-synthetic or composite water-based polyurethane condom. The full-synthetic or composite water-based polyurethane condom comprises an inner layer, a middle layer and an outer layer, wherein at least two of the three layers are made of water-based polyurethane composite materials. The full-synthetic or composite water-based polyurethane condom comprises the following materials in percentage by weight: 5-15% of diisocyanate, 12-25% of polytetramethylene ether glycol, 0.3-3% of hydrophilic chain extender, 0.3-2% of crosslinking modifying agent, 5-10% of diluting agent, 0.1-2% of a neutralizing agent, 0.1-2% of an amine chain extender and 62-70% of water. The full-synthetic or composite water-based polyurethane condom disclosed by the invention has the beneficial effects of no toxicity, no special smell, no sensitization, high strength, thinner effect and the like, and is capable of blocking viruses of venereal diseases. Compared with the existing polyurethane material, the full-synthetic or composite water-based polyurethane condom disclosed by the invention has the advantages that after film forming, the elongation is higher, the modulus is lower and the strength is higher; the elongation of the film is not less than 980%, the tensile strength is not less than 1900psi and the bursting pressure of the condom is not less than 1.0kPa.

The invention discloses a preparation method of a fully composite or composite water-based polyurethane condom. Acetone is used as a diluent, and diisocyanate and polytetramethylene ether glycol are added in proportion, mixed and reacted, and then a hydrophilic chain extender and a cross-linking agent are added. Combine modifier to prepare prepolymer; then add neutralizer and cool down with ice-water mixture, finally add amine chain extender to prepare water-based polyurethane emulsion, and finally make it with mold. Beneficial effects of the present invention: the composite or all-composite water-based polyurethane condom prepared by the present invention is non-toxic, has no special smell, has no sensitization, has high strength, can be thinner, has smaller molecular gaps, and can more effectively block venereal disease viruses, etc. . At the same time, the defects of low elongation after film formation, high modulus and poor strength existing in the existing polyurethane material and its preparation method are solved. Moreover, the method is simple, the operation is easy, the process conditions are mild, and there is no special requirement for equipment. The production of the condom can be carried out by using a traditional assembly line, which is convenient for mass processing.