In this blog post, I present to you another helpful rule of thumb for plastics part design and material selection.
Plastic part designs may have a weld line due to polymer melt fronts merging together to form one melt front. At the weld lines, glass fibers do not function as reinforcements and as a result reduced mechanical strength occurs in this area.
Accessing the approximately weld line strength of a polymer compound can be done by checking the tensile strength of the associated base polymer.
In the example below, glass fiber reinforced polyamide (PA 66 GF 50) has a tensile strength of 237 MPa and a weld line strength of 92 MPa. The associated base polyamide has a tensile strength of 85 MPa which is in a similar range as the weld line strength of the PA 66 GF 50 compound.
Thank you for reading & #findoutaboutplastics
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