Abstract: A method for producing polyamide particles may include: mixing a mixture comprising a polyamide, a carrier fluid that is immiscible with the polyamide, and nanoparticles at a temperature greater than a melting point or softening temperature of the polyamide and at a shear rate sufficiently high to disperse the polyamide in the carrier fluid; cooling the mixture to below the melting point or softening temperature of the polyamide to form solidified particles comprising polyamide particles having a circularity of 0.90 or greater and that comprise the polyamide and the nanoparticles associated with an outer surface of the polyamide particles; and separating the solidified particles from the carrier fluid.

Abstract: A method for producing polyamide particles may include: mixing a mixture comprising a polyamide, a carrier fluid that is immiscible with the polyamide, and nanoparticles at a temperature greater than a melting point or softening temperature of the polyamide and at a shear rate sufficiently high to disperse the polyamide in the carrier fluid; cooling the mixture to below the melting point or softening temperature of the polyamide to form solidified particles comprising polyamide particles having a circularity of 0.90 or greater and that comprise the polyamide and the nanoparticles associated with an outer surface of the polyamide particles; and separating the solidified particles from the carrier fluid.

Abstract: A method for producing polyamide particles may include: mixing a mixture comprising a polyamide, a carrier fluid that is immiscible with the polyamide, and nanoparticles at a temperature greater than a melting point or softening temperature of the polyamide and at a shear rate sufficiently high to disperse the polyamide in the carrier fluid; cooling the mixture to below the melting point or softening temperature of the polyamide to form solidified particles comprising polyamide particles having a circularity of 0.90 or greater and that comprise the polyamide and the nanoparticles associated with an outer surface of the polyamide particles; and separating the solidified particles from the carrier fluid.

Abstract: A pull holder of a covering curtain has an annular handle, an enclosed hole surrounded by the handle, a pivot cover, and a torsion spring. The pivot cover is pivotally connected to the handle via a pivot rod portion. The pivot rod portion has a pivot rod and a position restricting flange radially formed on the pivot rod and disposed between a first pivot portion and a supporting portion of the handle and next to the supporting portion. The torsion spring is mounted around the pivot rod and disposed between the supporting portion and a connecting portion of the handle. Thus, the pivot rod of the pivot rod portion of the pivot cover does not axially slide relative to the handle. Accordingly, the pull holder does not disassemble and can be operated stably.

Abstract: A pull holder of a covering curtain has an annular handle, an enclosed hole surrounded by the handle, a pivot cover, and a torsion spring. The pivot cover is pivotally connected to the handle via a pivot rod portion. The pivot rod portion has a pivot rod and a position restricting flange radially formed on the pivot rod and disposed between a first pivot portion and a supporting portion of the handle and next to the supporting portion. The torsion spring is mounted around the pivot rod and disposed between the supporting portion and a connecting portion of the handle. Thus, the pivot rod of the pivot rod portion of the pivot cover does not axially slide relative to the handle. Accordingly, the pull holder does not disassemble and can be operated stably.