30results about How to "Not easy to move out" patented technology

The invention relates to antibacterial high barrier polypropylene color master batch for a hygienic product packaging material and a preparation method thereof and belongs to the technical field of polypropylene color master batch. The antibacterial high barrier polypropylene color master batch for the hygienic product packaging material provided by the invention is prepared from the following components in percentages by mass: 40-50% of polypropylene powder, 5-12% of a cycloolefin copolymer, 5-10% of a modified starch antibacterial agent, 0.1-0.3% of a plasticizer, 1.7-4.85% of nano titanium dioxide, 12-15% of precipitated barium sulfate, 13.6-15.7% of kaolin, 2-3% of an antioxidant, 2-3% of a dispersant and 5-6.5% of a lubricant. The color master batch serving as a soft packaging material for a hygienic product has an excellent barrier property and good antibacterial activity.

The invention provides a laser marking halogen-free marking heat shrinkable tube which is prepared from the following raw materials in parts by weight: 10-40 parts of polyethylene, 15-45 parts of a flame retardant, 15-30 parts of laser marking powder, 1-10 parts of a plasticizer, 25-75 parts of an ethylene-vinyl acetate copolymer and 1-8 parts of an assistant, wherein the flame retardant is a halogen-free flame retardant. According to the technical scheme, the organic halogen-free flame retardant and the inorganic halogen-free flame retardant are mixed, so that the whole material can still obtain better flame retardant property under the condition of less use, the content of the laser marking powder in the whole material can be ensured, the marking definition is improved, and the acid resistance of the whole material is not influenced. According to the technical scheme, all the components are green and non-toxic, and good environmental protection performance is achieved.

The invention relates to a post-chain extending flame-retardant waterborne polyurethane modified by a hyperbranched blended hard segment, and belongs to the field of flame-retardant materials. The waterborne polyurethane is prepared by a method with the following steps of dewatering macromolecular polyols, adding a hydrophilic chain extender and diisocyanate, and reacting until the content of -NCO is not changed; adding phosphor-containing polyol micromolecules until the content of -NCO is not changed; adding a salt forming agent A, so as to obtain a prepolymer; adding water into the prepolymer, and then adding an acetone/butanone/N-methyl pyrrolidone solution of a phosphorus-containing diamine chain extender, so as to obtain an emulsion; adding the emsulion into an AWHBPU water solution neutralized by a salt forming agent B to emulsify, and performing rotary evaporation to remove the solvent, so as to obtain the waterborne polyurethane. The waterborne polyurethane has the advantages that by modifying flame retardance via the hard segment, the flame-retardant property is improved, and the halogen-free and environment-friendly effects are realized; by modifying via post-chain extending, the flame-retardant property is improved, the mechanical property is improved, and the stability is improved; by blending the AWHBPU and the post-chain extending flame-retardant waterborne polyurethane, the mechanical property and stability are further improved.

The invention provides an iron-leak-preventing structure for a permeable brick of a hot metal ladle and a replacing method for the iron-leak-preventing permeable brick. The replacing method for the iron-leak-preventing permeable brick specifically comprises the steps of: firstly disassembling building bricks of an original working layer which is not less than 600mm from the outer edge of the permeable brick; taking out the old permeable brick; mounting a novel permeable brick; reserving a gap between the periphery of the novel permeable brick and each of original permanent layers of the hot metal ladle; then filling the gaps with brine blended clayey ramming mass and performing ramming; then building the disassembled part with magnesia carbon bricks in a wet building manner and meanwhile, reserving gaps between the periphery of the permeable brick and the built working layers; pouring a corundum self-flowing pouring material; and then performing natural preservation 6-8h to enter a baking stage. The structure provided by the invention is simple and convenient in building construction, can avoid an iron-leak phenomenon as the permeable brick is replaced, and is good in iron-leak-preventing effect, so that the potential safety hazard of the hot metal ladle due to iron leakage is avoided.

The invention relates to a composition containing polyvinyl alcohol. The composition includes components by weight in parts in the specification. The composition allows an obtained polyvinyl alcohol film to have good rigidity and stiffness.

The invention provides a PMMA monomer copolymerized organic glass production process. The PMMA monomer copolymerized organic glass production process comprises the following steps: 1) preparing raw materials from the following components in percentage by mass: 79-85% of methyl methacrylate, 5-10% of an antistatic agent, 5-10% of an intermediate monomer and 1-3% of an initiator; 2) weighing the rawmaterials in proportion, adding the methyl methacrylate and the initiator in the step 1) into a dissolving device together, and carrying out mutual dissolution reaction for later use; and 3) weighingthe raw materials in proportion, adding the double-bond-containing antistatic agent in the step 1) and an intermediate monomer into a high-temperature dispersion device together, dissolving the double-bond-containing antistatic agent into the intermediate monomer through ultrasonic treatment, and taking out for later use. The transparent anti-static organic glass formed by copolymerization has the characteristics of high light transmittance, excellent anti-static performance, low possibility of migration of the anti-static agent, simple process and low cost, and has a wide application prospect.

The invention relates to degradable resin and a method for preparing a straw from the degradable resin. The degradable resin is prepared from the following raw material components in 100 parts by weight: 70 to 95 parts of polylactic acid, 1 to 10 parts of a toughening agent, 0.5 to 15 parts of a filling agent, 0.1 to 1 part of a lubricating agent, 0.05 to 0.2 part of a nucleating agent, 0.08 to 0.3 part of a compatilizer, 0.1 to 2 parts of a plasticizer, 0.1 to 1 part of an antioxidant and 0.1 to 3 parts of a coupling agent; wherein the polylactic acid is PLAlx175; the toughening agent is poly (butylene succinate) (PBS); the filling agent is a mixture of one or more of starch and bamboo fiber powder; and the coupling agent is a mixture of one or more of titanate or lauric acid. According to the invention, the straw solves the problems that an existing straw is poor in heat resistance, the filler is easy to migrate out, and the food contact requirement cannot be met.

The invention relates to a composite processing additive for a plastic thin film and a preparation method thereof. The composite processing additive is prepared from the following components in percentage: 0.5 to 0.8% of diameter expanding agent, 1.2 to 1.8% of emulsifier, 3 to 5% of antioxidant, 15 to 25% of filling agent, 3 to 5% of slipping agent, 5 to 10% of activator, and the balance of water. The preparation method comprises the following steps of S1, preparing raw materials; S2, preparing the emulsifier; S3, preparing a processing additive mixed solution; S4, aging. The composite processing additive has the advantages that the cost is low, the application range is broad, and the stability is good.

The invention discloses a half cutting machine of a culture medium for experiments. The half cutting machine structurally comprises a half cutting structure, a control box, a belt, a motor, a bottom rack and a conveying platform. The bottom of the conveying platform is movably provided with the bottom rack, one end of the conveying platform is movably provided with the half cutting structure and the control box, one side of the control box is provided with the belt, and one end of the belt is mechanically connected with the conveying platform. According to the half cutting machine, a first clamping sheet, second clamping sheets and a third clamping sheet form a triangular structure, the surfaces of the first clamping sheet, the second clamping sheets and the third clamping sheet are smooth, the culture medium is half wrapped for fixing and prevented from relatively sliding, the globular or original culture medium is halved, and a cutter directly upwards cuts off the culture medium fromthe bottom and directly cuts the culture medium into halves. According to the half cutting machine, the first clamping sheet, the second clamping sheets and the third clamping sheet are semi-circulararc plates, the head and tail ends are slightly bent to fix the culture medium, the cutter upwards cuts the culture medium from the bottom, the culture medium is not prone to moving outwards, and thecut culture medium is more precise.

The invention discloses a room temperature vulcanized rubber strip for automatic repair of a conveyor belt and a preparation method thereof. The room temperature vulcanized rubber strip comprises a rubber strip 1 and a rubber strip 2. The rubber strip 1 is prepared from the following raw materials in parts by weight: 50 to 80 parts of natural rubber plasticated rubber, 20 to 50 parts of end groupfunctionalized solution polymerized styrene-butadiene rubber, 2 to 5 parts of zinc oxide, 0.5 to 1.5 parts of stearic acid, 5 parts of anti-aging agents, 4 to 10 parts of alkyl phenolic tackifying resins, 30 to 45 parts of high wear resistant carbon black, 5 to 10 parts of bisphenol A, and 1.0 to 3.0 parts of sulfur; the rubber strip 2 is prepared from the following raw materials in parts by weight: 70 to 100 parts of end group functionalized solution polymerized styrene-butadiene rubber, 10 to 30 parts of terminal carboxyl liquid nitrile rubber, 30 to 45 parts of high wear resistant carbon black, 1.0 to 3.0 parts of zinc isopropyl xanthate, and 0.3 to 1.0 part of phthalic anhydride. The room temperature vulcanized rubber strip for the automatic repair of the conveyor belt and the preparation method thereof solve technical problems that an adhesive tape for repairing the conveyor belt in the prior art is inconvenient to store, the viscosity is poor, and the repair quality is poor.

The invention discloses an anti-aging LED string light and a preparation method thereof, belonging to the technical field of lighting devices. The LED string light comprises an FPC circuit board, a plurality of LED lamp beads electrically connected to the FPC circuit board, and a sheath layer wrapping the FPC circuit board and the LED lamp beads. The sheath layer comprises the following raw materials by weight: 25-30 parts of natural rubber, 80 to 85 parts of butadiene rubber, 4-5 parts of zinc oxide, 0.5 to 1.5 parts of stearic acid, 15 to 20 parts of epoxidized soybean oil, 1 to 2 parts of dodecanethiol, 5-8 parts of an amine latent curing agent, 0.3 to 0.5 part of an anti-aging agent, 1-3 parts of a vulcanizing agent and 35-45 parts of a filler. Through cooperation of the natural rubberand the butadiene rubber, the sheath layer has good elasticity, wear resistance and weather resistance. The zinc oxide has a good vulcanization activation effect, and the stearic acid has a good dispersion effect and a good vulcanization promotion effect. The epoxidized soybean oil modified by dodecanethiol has a synergistic effect on the antioxidant, thereby improving the anti-aging effect of the system, so the sheath layer can maintain good light transmittance stability for a long time.

The invention discloses a color master batch suitable for milk product packaging materials utilizing polypropylene as a base material. The color master batch contains the following components in partsby weight: 100-120 parts of polypropylene, 60-80 parts of pigments, 1-5 parts of an antibacterial agent, 1-5 parts of a lubricating agent and 0.1-0.2 part of a dispersing agent. A production processof the color master batch comprises the following steps: mixing, blending and extrusion granulation. By virtue of the cooperative use of polypropylene and the antibacterial agent, a polypropylene color master batch is endowed with excellent antibacterial property and high barrier property, the processing formation properties of the antibacterial agent, polypropylene and the pigments are enhanced,and meanwhile, the antibacterial agent is unlikely to migrate out, so that the produced polypropylene color master batch has durable antibacterial activity after being produced into a milk product package, and the quality of the mild products can be durably maintained.