摘要:
An article manufactured in a mould and which comprises a structural composite of plastics layers, the article having a wall defining an internal space for holding contents therein; wherein, the wall is formed from at least two layers of plastics materials; wherein a first of said layers comprises a thermoplastics material and at least a second layer comprises a thermosetting resin and a fibrous layer.
摘要:
The invention relates to heat treatment of polymorphic semicrystalline or crystallizable polymers to increase the content of the highest melting crystalline form. Such heat treatment results in a polymer powder that has a consistent, uniform melting range, improved flow and improved durability of the powder particle size for applications that require powder flow at elevated temperatures. In addition to improved powder properties, the articles produced from the powders also exhibit better physical properties in both appearance and in mechanical properties. Thus the invention also includes polymer powders and articles produced by the described processes.
摘要:
A method for manufacturing an optical lens includes providing an uncured light diffusion body, the light diffusion body comprising a first optical surface located at a bottom thereof, and a second optical surface located at a top thereof and arranged oppositely to the first optical surface, the light diffusion body defining a receiving cavity recessed from a central portion of the second optical surface toward the first optical surface; introducing a light transmissive material doped with diffusion particles into the receiving cavity to a desired thickness; and solidifying the light transmissive material and the light diffusion body. An optical lens manufactured by the method and a light source module incorporating the optical lens are also provided.
摘要:
An apparatus including a fairing operable to suppress a vortex-induced vibration of a tubular, the fairing having a body portion and a tail portion that tapers from the body portion to an end portion, the body portion defining an annulus dimensioned to encircle a tubular. The apparatus further including a stabilizing member positioned along the body portion, the stabilizing member being dimensioned to stabilize the fairing along a tubular positioned within the annulus.
摘要:
Embodiments relate generally to plastic wall panels. Wall panels are formed by rotational molding processes and may be used in sound attenuation barriers or other wall or building structures. Some embodiments include reinforcing structure. The reinforcing structure may be configured to effectively support a plastic shell of the wall panel in a way that allows some relative movement between the plastic shell and the reinforcing structure.
摘要:
An article manufactured in a mould and which comprises a structural composite of plastics layers, the article having a wall defining an internal space for holding contents therein; wherein, the wall is formed from at least two layers of plastics materials; wherein a first of said layers comprises a thermoplastics material and at least a second layer comprises a thermosetting resin and a fibrous layer.
摘要:
The present invention discloses a single layer rotomoulded article prepared from a blend of polyethylene, functionalised polyolefin and one or more resins selected from polyetherester or saturated polyester or polycarbonate or polyamide.
摘要:
A variety of hollow structures with unique morphologies were manufactured with a rotational spinning technique. Phase separation of soluble solutions or emulsions was induced within a filled mold as it was being rotated about one of its axis. The density difference between phases results in sediment at the inner lumen of the mold under centrifugal forces. After or during sedimentation, gelation of the phase-separated particles fixes the hollow structure morphology and the solvent remains in the center of the mold. The solvent is removed from the mold resulting in a coating or tube. By controlling the rotational speed and the formulation chemistry, the tube dimensions and wall morphology can be manipulated. This technique offers a new approach to the manufacture of polymeric tubes. It requires small quantities of starting material, permits multi-layering of tubes, is applicable to diverse polymers and can result in highly diffusive hollow structures while maintaining good mechanical strength.
摘要:
A variety of hollow structures with unique morphologies were manufactured with a rotational spinning technique. Phase separation of soluble solutions was induced within a filled mold as it was being rotated about one of its axis. As phase-separation occurs within this rotating mold, the increase in density of one phase results in sediment at the periphery under centrifugal forces. After or during sedimentation, gelation of the phase-separated particles fixes the tube morphology and the solvent remains in the center of the mold. The solvent is removed from the mold resulting in a tube. By controlling the rotational speed and the formulation chemistry, the tube dimensions and wall morphology can be manipulated. This technique offers a new approach to the manufacture of polymeric tubes. It requires small quantities of starting material, permits multi-layering of tubes, is applicable to diverse polymers and can result in highly diffusive hollow structures while maintaining good mechanical strength.