34results about How to "Avoid premature decomposition" patented technology

There is provided a laminate sheet which is excellent in oxygen-barrier property and moisture resistance, biodegradable as a whole and therefore suitable as a base material for packaging materials, such as food containers. The laminate sheet is formed by laminating a water-containable and biodegradable polymer substrate sheet or a precursor thereof in a water-containing state with a layer of polyglycolic acid resin having a residual monomer content below 0.5 wt. % to form a laminate, and subjecting the laminate to bonding and forming under heat and pressure.

There is provided a laminate sheet which is excellent in oxygen-barrier property and moisture resistance, biodegradable as a whole and therefore suitable as a base material for packaging materials, such as food containers. The laminate sheet is formed by laminating a water-containable and biodegradable polymer substrate sheet or a precursor thereof in a water-containing state with a layer of polyglycolic acid resin having a residual monomer content below 0.5 wt. % to form a laminate, and subjecting the laminate to bonding and forming under heat and pressure.

The invention provides a low-odor low-TVOC polypropylene composite material and a preparation method thereof. The low-odor low-TVOC polypropylene composite material is characterized by comprising thefollowing raw materials in parts by weight: 30-99% of polypropylene, 0-30% of an elastomer; 0-40% of mineral powder; 0.5%-10% of an odor adsorbent; 0.5 to 4% of other auxiliary agents; wherein the odor adsorbent is prepared from the following raw materials in parts by weight: 10 to 75% of ethylene-monoolefine copolymer; 10-40% of a microporous substance; 10-40% of a porous substance; 1-5% of a metal oxide; 1-4% of a metallic soap; 1-4% of a bicarbonate; 5-20% of a liquid filler; 0.2 to 1.0% of an antioxidant; and 0.2 to 1.0% of a lubricant. The low-odor low-TVOC polypropylene composite material disclosed by the invention has relatively low odor and TVOC value.

The invention discloses a secondary water supply water storage tank with a sludge detection function, and belongs to the technical field of secondary water supply. Through the arrangement of a photosensitive detection cylinder part, the sludge accumulation condition can be detected only by turning on a light supply lamp, if the sludge accumulation at a certain position is relatively thick, a result judgment film in the photosensitive detection cylinder part does not change, otherwise, if a certain position has no sludge or less sludge, the result judgment film in the photosensitive detection cylinder part protrudes outwards and deforms, so that a worker can complete the detection of the sludge accumulation condition without entering a stainless steel box body, and the detection of the sludge accumulation condition can be completed. The detection method is simple, efficient and accurate and is high in practicability, a worker can roughly judge the sludge accumulation condition at the bottom end of the stainless steel box body according to the change condition of a plurality of photosensitive detection cylinder parts, then the cleaning work can be reasonably arranged according to the accumulation condition of the sludge, so that unnecessary cleaning can be avoided, and the water safety problem caused by excessive sludge can be prevented.

The invention discloses a dispersion method for ceramic particles in the process of metal material surface composite plating and belongs to the technical field of metal surface treatment. According to the dispersion method for the ceramic particles in the process of metal material surface composite plating, an ammonium type compound is added during preparation of a ceramic particle slurry to be used as a dispersion agent; through the combination of NH4+ and the ceramic particles, the ceramic particles can be evenly distributed in a plating solution and stably suspend, plating of the ceramic particles is reduced or avoided, the bearing capacity of the plating solution is not influenced, the situation that because the ceramic particles are added to the plating solution, the plating solution is decomposed in advance is avoided, the service life of the plating solution is prolonged, and the plating cost is reduced; and meanwhile, the generated NH4+ structure is one of metal ion complexing components in the plating solution, the improvement on the stability of heavy metal ions in the plating solution is facilitated, the performance of a plating layer is prevented from being influenced, and the improvement on the performance of the plating layer is facilitated.

An agricultural chemical component includes an active agricultural chemical ingredient and a powder metal-modified apatite which has part of metal atoms in its apatite crystal structure provided by an optically catalytic metal. Preferably, the metal-modified apatite is coated with an organic film.

The present invention relates to an improved melting grafting method of polypropylene and polyether acrylate, which comprises the following process steps: a) adding polyether acrylate monomers, peroxidation initiators and antioxidants into a high-speed disperser at normal temperature Mix uniformly in the middle to form a mixed solution of grafted monomer and initiator; b) the twin-screw extruder is heated up to the reaction temperature, and the polypropylene resin is passed through the feeder of the twin-screw extruder, with a fixed feeding frequency Add from the feed port; c) at the feed port of the twin-screw extruder mixing section, continuously add the mixed solution of the graft monomer and the initiator by the liquid pump to make the peroxidation initiator, polyether acrylate monomer and react with polypropylene melt in the mixing section of the twin-screw extruder; d) Turn on the vacuum pump at the end of the screw to remove low-molecular matter, and the extruded melt is cooled and pelletized to obtain the final polypropylene / Acrylic polyether ester grafted product. The invention avoids the problem of material slipping at the feeding port of the twin-screw extruder, is beneficial to the grafting reaction, and improves the grafting efficiency.

The invention discloses an environment-responsive cementing filter cake removal liquid, which comprises the following components in parts by weight: 5-20 parts of environment-responsive scavenger A, 0.2-5 parts of environment-responsive scavenger B. 0.5-3 parts of surfactant 1. 0.3-2.5 parts of suspending agent, 0.5-3 parts of stabilizer and 100 parts of water with a pH of 8-10. The scavenger component of the present invention can only start to react under certain temperature and pH conditions downhole, and through the synergistic activation of the environment-responsive scavenger B-formation heat on the environmental-responsive scavenger A, the decomposition of the polymer treatment agent is improved Efficiency and speed, to achieve rapid decomposition in a short period of time, the solid phase particles are easy to be removed after the filter cake is destroyed, and avoid the early decomposition of the scavenger caused by liquid preparation, transportation and other links, and adapt to the characteristics and requirements of cementing operations.

The invention discloses a manufacturing method of mirror oriented silicon steel. The manufacturing method of the mirror oriented silicon steel comprises the steps that molten iron is smelted, one or more elements of Sb, Sn, P, Cu and Bi are added in the smelting process, and after the molten steel is refined and poured, a plate blank is obtained; after the plate blank is heated to 1320 DEG C-1400DEG C, the plate blank is hot-rolled, and a hot-rolled plate is prepared; the hot-rolled plate is normalized; the hot-rolled plate after being normalized is cold-rolled, and a cold-rolled plate is obtained; the cold-rolled plate is decarburized and annealed, during decarburizing and annealing, the carbon content in the cold-rolled plate is reduced to below 30ppm, meanwhile, a SiO2 oxide layer is formed on the surface of the cold-rolled plate, the oxygen adhering amount of the cold-rolled plate is controlled to be less than 500ppm, and the reduction time is controlled to be greater than 100 seconds; the decarburized and annealed cold-rolled plate is dried and annealed with magnesium oxide as an isolating agent; and the dried and annealed cold-rolled plate is heated to 1170-1250 DEG C at a preset heating rate for high temperature annealing.