Weldline strength

Retained weldline strength over twice the value for LFRT grades. [Pg.841]

The low weldline strength is an another disadvantageous problem of injection molded parts of TLCPs.The injection molded test pieces of Me-HQ/BB/NDA(m/n=9.5/0.5) showed twice higher weldline strength than those of the TLCPs on the market. [Pg.271]

The injection molded parts of Me-HQ/BB/NDA(m/n 9.5/0.5) showed high flexural modulus,low mechanical anisotropy, high weldline strength and excellent resistance to delamination and we consider that this material is a very promising material as a substituent for aluminium. [Pg.271]

The blends for extrusion or injection molding contain < 6 wt% elastomer (e.g., butyl acrylate-co-methacrylate) and thus are opaque. They show low temperature toughness, high impact strength, good weldline strength, and HDT... [Pg.2181]

Figure 5.1 Mechanical properties vs. blend compositions for recycled PET blends. RA-063 , PP-g-PS , PP-g-P(S-co-GMA). (a) Flexural modulus vs. recycled PET blend composition, (b) Flexural strength vs. recycled PET blend composition, (c) Notched Izod vs. recycled PET blend composition, (d) Tensile strength vs. recycled PET blend composition, (e) Weldline strength vs. recycled PET blend composition.

Table 9.15 Weldline Strength of Short and Long Glass Fiber-Reinforced...

W Michaeli, S Caluschia. Procedures for Increasing the Weldline Strength of Injection Molded Parts. ANTEC, SPE, Detroit, 1993, pp 534-542. [Pg.330]

The mechanical properties of the weldline zone can be influenced by the material characteristics and by the processing conditions. In practical terms, the freedom one has to improve the weldline strength by changing processing parameters, such as the melt and mold temperatures, to favor chain diffusion is limited (polymer degradation and longer cycle time) [4]. [Pg.878]

Keywords weldline, injection molding, cold weldline, hot weldline, flow, skin-core structure, weldline strength, fiber orientation, fountain flow, gate. [Pg.881]

A. Meddad and B. Fisa, Weldline strength in glass fiber reinforced polyamide 66, Polymer Engineering Science, 35, 893-901 (1995). [Pg.46]

B. Fisa and M. Rahmani, Weldline strength in injection molded glass fiber-reinforced polypropylene, Polymer Engineering Science, 31, 1330-1336 (1991). [Pg.46]

S. J. Liu, J. Y. Wu, J. H. Chang and S. W. Hung, An experimental matrix design to optimize the weldline strength in injection molded parts. Polymer Engineering Science, 40, 1256-1262 (2000). [Pg.46]

PP + polystyrene was compatibilized by adding glass fibers, increasing modulus, weldline strength, and impact strength [73]. [Pg.640]

A well-known characteristic of chopped-fiber composites and LCP is that they are extremely sensitive to weld lines in injection molding, so that care must be taken to move the weld lines to non-critical areas within the part. A study of butt-type weld lines compared LCP/TP blends with pure matrix polymer for a number of TPs and determined that there was significant reduction in strength relative to the non-weldline case, but that there were blends in which the weldline strength was nevertheless greater than the pure TP. In every case, the tensile modulus, which is often the more important property for engineering thermoplastics, was greater for the LCP/TP blend weldline than for the maximum observed for the pure TP (in some cases the... [Pg.153]

THE INFLUENCE OF PROCESSING VARIABLES AND TWO-WAY INTERACTIONS ON THE WELDLINE STRENGTH OF INJECTION... [Pg.537]

On the whole, the influences of the factors on non-weld strength is simple than weldline strength relectively. [Pg.538]

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