38results about How to "No qualitative change" patented technology

The invention provides a preservation device for freeze-drying food with a predetermined shape, and an application method thereof, and relates to the technical field of freeze-drying food preservation. The preservation device comprises a case body, wherein a display is arranged on the upper end of the case body; a connecting rod is arranged on the lower end of the display; a shock absorption layeris arranged on the inner side of a seal layer; a preservation box body is arranged on one side of the shock absorption layer; an anti-radiation layer is arranged on the inner side of the preservationbox body; a temperature controller is arranged in a defreezing device; a refrigerating assembly is arranged in a support tray; a vacuum pump is arranged on one side of the case body; a trap pump valve is arranged on the lower end of the vacuum pump; a through slot is formed in the lower end of the trap pump valve; a box door is arranged on one side of the hinge; and a handle is arranged in the box door. The problems that according to a preservation device in the current market, selling points such as the predetermined shape cannot be added, defreezing cannot be realized quickly, normal operation of the device cannot be ensured, the cleanliness and the health of internal air cannot be ensured, the oxygen content in the device cannot be detected in time, the preservation degree of food cannot be ensured, and the selling of freeze-draying food is affected are solved.

The invention relates to a gas well drainage compound agent. The gas well drainage compound agent comprises the following components, and the following components are calculated by mass percentage: 30% of ethylene glycol, 3% of dispersant sodium sulfonate, 5% of triethylene glycol, Anti-swelling agent quaternary ammonium salt 5%, corrosion inhibitor imidazoline 6%, methanol 7%, emulsifier monoglyceride 2%, and the balance is water. The gas well drainage agent of the present application is regularly added in a certain amount to promote the multiple contact, dissolution and miscibility of natural gas and bottom fluid, thereby improving the density and fluidity of the wellbore fluid, and achieving the purpose of drainage and gas enhancement.

The present invention provides a novel sewing-free hot melt adhesive TPU-PU leather and a preparation method thereof. The hot melt adhesive TPU-PU leather comprises a release paper, a hot melt adhesive film, a TPU film, and a dry PU film. The release paper comprises a bottom paper layer, an adhesive layer, a plastic layer, a transition layer, and a release layer; a hot melt adhesive raw material comprises polyester polyol, diisocyanate, polyether polyol, and a plurality of additives; a TPU raw material comprises polymer polybasic alcohol, 1,4-cyclohexane-diisocyanate, a chain extender, and a plurality of functional additives; and a PU raw material comprises polyester glycol, straight-chain diol, isocyanate, TDI Tripolymer, dimethylformamide, butanone, black sand, and a plurality of functional additives. According to the present invention, innovations are conducted on raw material components of the release paper, the hot melt adhesive, the TPU film, and the PU film; and the prepared sewing-free TPU-PU leather has the technical advantages of firm adhesion, durability, environmentally-friendly materials, no invisible harm to human body, and the like.

The invention discloses a raffinose extraction method. Degreased cotton meal is used as a raw material, an organic solvent aqueous solution is used for extraction and dephenolizaiton, dephenolized cottonseed protein and dephenolization liquid are obtained, and raffinose is extracted from the dephenolization liquid, wherein the organic solvent aqueous solution is a low-concentration weak-alkaline organic solvent aqueous solution. The method has the advantages that operation is simple, raw materials are easy to obtain, and the method is lower in cost, small in pollution, low in equipment requirement and suitable for industrial mass production.

The invention relates to a primer, a preparation method and application thereof, and belongs to the technical field of combining metal and nonmetal. The primer includes the following components in mass percentage: 15% to 20% polychlorotrifluoroethylene fine powder with particle size ≤ 100 μm, 0.5% to 1.2% surfactant, 2% to 5% chromic anhydride, 2.5% to 5% % phosphoric acid, the balance is water. The primer provided by the embodiment of the present invention uses polychlorotrifluoroethylene fine powder with a particle size not greater than 100 μm and uses a surfactant to disperse the polychlorotrifluoroethylene fine powder in water to obtain a uniform suspension, and the suspension The solution can be left for about 100 days without qualitative change, and has high stability. At the same time, the formula does not produce toxic and harmful substances, which is safe and environmentally friendly.