The process involves two steps, which can be integrated or separate: extrusion of a billet of resin and filler, and die drawing
to highly orient the polymer chains and create voids ("dynamic cavitation") around the mineral particle.
Aan die begin van die artikel die hele drawing en dan deel ons die bladsy in dele op: links dele van die drawing en regs die verduideliking waaroor dit gaan.
Kom ons besluit nou eers wat ons ailes wil se, dan kyk ons wat kort nog voordat ek die drawing klaarmaak.
High-degree orientation of the polymer chain can be achieved by special processing techniques, for example, ram extrusion (piston-cyclinder), hydrostatic extrusion, and die drawing
(solid-state extrusion) (11-14).
has been working on die drawing
of cellulose-filled PP.
, die-drawn toughened polypropylene, production, properties and impact toughness of, 1317
Identification of a Plateau in Solid State Die Drawing
of Polypropylene/Talc [T23] by Kevin Nichols, Dow Chemical Co.
Hydrostatic extrusion (1-2), ram extrusion (3), tensile drawing (4-5), radial compression (6) and die drawing
(7) are all processes that have been successfully applied to polymers with the main purpose of achieving alignment of the molecular chains and thereby improving the mechanical properties of the material, particularly tensile modulus and strength.
reduces the density of the 1 x 4 profiles and adds stiffness by creating elongated holes behind the individual wood fibers as the material is pulled in the machine direction, similar to the grain in natural wood.
As we reported in March 2006, die drawing
stretches the composite as it passes through the die, creating micro-voids behind the wood fibers.
of wood-plastic composites was developed by Frank Maine in Guelph, Ont.
A developer of new plastics technologies is applying low-temperature die drawing
to take advantage of a new raw material: expanded, oriented, wood-filled polypropylene (EOW-PP).