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202results about How to "Less frizz" patented technology

High polymer material ultraviolet laser 3D (three-dimensional) printing method and device for precise temperature control

The invention discloses a high polymer material ultraviolet laser 3D (three-dimensional) printing method and device for precise temperature control. The device comprises a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a machining platform, a powder paving device, a machining material and a computer control system. The laser head adopts a dual-tube core structure, an inner tube and an outer tube are coaxially fixed, one or more than one gradual-change neutral filter piece is arranged between the two tubes, and the laser transmittance of the filter piece(s) is radially reduced from the inner tube to the outer tube. The method comprises the following steps: presetting the machining temperature by the control system, in the process of machining, monitoring the temperature rise condition of an object to be machined in real time under the irradiation of laser by the non-contact type temperature monitoring device, feeding back to the control system, recording the increased value of the temperature within a certain time, and obtaining the absorption capability of the material to be machined to the laser and the temperature rise degree by the system, so that according to the preset machining temperature value, the laser output power can be calculated, the laser power can be timely adjusted, and the machining temperature can be precisely controlled.
Owner:INST OF CHEM CHINESE ACAD OF SCI +1

Ultra-high molecular weight polyethylene (UHMPE) and nano-inorganic substance composite material and manufacturing method of high-performance fiber thereof

The invention discloses an ultra-high molecular weight polyethylene (UHMPE) and nano-inorganic substance composite material and a manufacturing method of high-performance fiber thereof, belonging to the field of a composite material.The manufacturing method of the composite material comprises the following steps: preparing UHMPE and a nano-inorganic substance, such as attapulgite, a carbon nanotube, sepiolite, wollastonite, montmorillonite and the like into gel solution; in the case of light transmittance close to zero under certain concentration, heating the gel solution for dissolving; and vacuumizing, defoaming, spinning with different spinneret boards containing various spinneret angles as well as feed length and discharge length, carrying out air-quenching, carrying out aqueous-phase curing, performing multi-segment temperature change extension and the like to finally obtain the composite material for the ultra-high strength fiber the light transmittance of which is close to zero. The obtained composite material can increase the strength and modulus of UHMPE fiber and solve the defects of the UHMPE fiber, such as high crimp, high creep, light transmittance and the like.
Owner:叶正涛 +1
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