But in the usage of the plate, moisture should be prohibited to ensure its insulating and antibreakdown properties; hence, re-drying after the boiling water bath is recommended. Furthermore, it can be seen that there is less resin on the fibers on the fracture surface treated by route II, whose tensile strength is the highest ( Figure 8(a)). Boiling water bath combines the influences of annealing [ 15, 24] and water conditioning saturation [ 19, 25]. Influence of the fibre/matrix interface on ageing mechanisms of glass fibre reinforced thermoplastic composites (PA-6,6, PET, PBT) in a hygrothermal environment.

To determine the effects of boiling water bath and re-drying on the dimensional accuracy and mechanical properties of the product, three treatment routes were applied. This can result in dimensional changes up to 2% and a corresponding reduction of physical properties. For convenience, the longitudinal dimension of the product is collectively referred to as “LD,” the transverse dimension is collectively referred to as “TD,” and the diameter of the central hole is referred to as “DD. Re-drying at 110°C for 6 h can further enhance the mechanical properties of the PA66-26GF FR (RP) composite as a whole mainly because of the reduction in the internal residual stress. Figure 10(b) clearly shows that the dimples of the PA66 matrix are deep and uniform, and the PA66 matrix contains few holes.One method is to modify the mold size according to the transverse and longitudinal shrinkage ratios; the other method is to apply an external force to limit linear shrinkage after demolding. where S L is the shrinkage ratio of the injection molded products, L m is the mold cavity size (the real size after considering the shrinkage volume compensation of 0.

The dimensional accuracies and mechanical properties of the plate meet the engineering requirements, as shown in Figure 1 and Table 2, respectively. Telegraphic Transfer or Telex Transfer, often abbreviated to TT, is a historic term used to refer to an electronic means of transferring funds overseas. The values of the tensile and bending strengths, elastic modulus, and elongation at break are measured on a CMT5105 universal testing machine (Mattes Industrial Systems Co. Route II achieves the highest tensile strength among the three routes because the PA66 matrix treated by route II is stronger than the PA66 matrix treated by the other routes, and the failure mode changes from matrix fracture to interfacial fracture before the elongated fibers break [ 24].Figure 6(a) and (b) show the DD T of the undried and the dried parts, respectively, while Figure 6(c) and (d) show the DD L of the undried and dried parts, respectively. It can also be seen that differences between the “DD T” and “DD L” for samples treated by route I without a “supporting mold” are the largest, and the values of “DD T” and “DD L” for the undried or dried parts are all out of the tolerance ranges. DHL Express is a division of the German logistics company Deutsche Post DHL providing international express mail services. It was found that the route in which the boiling water bath is applied after the “supporting mold” is preferred to ensure the dimensional accuracies and the mechanical properties as a whole.