3results about How to "Solve the reuse problem" patented technology

The present application belongs to the technical field of glass fiber sizing agent, and particularly relates to an anti-creep glass fiber sizing agent and a preparation method thereof. The anti-creep glass fiber sizing agent comprises effective components and water, and the solid content of the anti-creep glass fiber sizing agent is 3-12%. The effective components comprise the following components according to weight percentage: maleic anhydride modified long-chain branched polyolefin wax 65.5-86.9 wt.%, coupling agent 5-10 wt.%, nucleating agent 1-8 wt.%, physical cross-linking component 5-12 wt.%, initiator 0.1-0.5 wt.%, and surfactant 2-4 wt.%. The present application can effectively solve the problem of insufficient anti-creep ability of the glass fiber reinforced polypropylene material in the prior art, and at the same time, the material has good mechanical properties and fatigue resistance, which plays an important role in improving the long-term dimensional stability of the polypropylene material.

This invention provides a multi-scale corn stalk cellulose-reinforced cementitious material and its preparation method. The multi-scale corn stalk cellulose-reinforced cementitious material comprises multi-scale corn stalk cellulose and cement. The multi-scale corn stalk cellulose has both micron-fiber and nanofiber structures. The micron-fibers have a diameter of 1-5 μm and a length of 500-3000 μm, and the nanofiber structures are mainly distributed on the surface of the micron-fiber structures, with a diameter of 1-5 nm and a length of 100-2000 nm. The multi-scale corn stalk cellulose-reinforced cementitious material provided by this application exhibits higher flexural and compressive strengths (10-30% increase) than the control group cement, and has broad application prospects in the field of construction engineering.

The utility model relates to a kind of integrated waste exhaust rail vehicle air conditioning unit, including shell, evaporative cavity and condensing cavity are in the shell, condenser is installed in the condensing cavity, total heat exchanger is installed in the evaporative cavity, fresh air inlet and waste exhaust inlet are provided on the shell of the evaporative cavity, condensing air outlet is provided on the shell of the condensing cavity, fresh air and waste exhaust respectively pass through the total heat exchanger and carry out heat exchange in total heat exchanger, waste exhaust passage for guiding waste exhaust after heat exchange with fresh air to condenser air inlet side is provided in the condensing cavity, waste exhaust fan is installed in the waste exhaust passage, waste exhaust is discharged by condensing air outlet after secondary heat exchange with condenser.The utility model can make the cold energy and heat in waste exhaust be fully recycled, effectively avoid that cold energy / heat in car is lost in large quantities, improve air conditioning energy efficiency.