Effects of hygroscopic properties on weld line integrity of tensile specimens of high temperature glass reinforced nylon

摘要

Weld lines are present in many plastic components throughout the world. Avoiding weld lines is almost impossible, so knowing the effect they have on the physical properties of plastic structures is extremely important. Combining this with the hygroscopic properties of polyamide yields vital information about the integrity of the molded nylon. Single and double gated specimens were obtained and saturated under controlled conditions to determine the rate of water absorption into the molecular structure of the nylon. Based on this, controlled groups of single and double gated samples were saturated at 10% increase by weight increments and sealed. Finally the change in maximum tensile strength was measured, documented, and analyzed.