when repairing large, flat surfaces with polyester resins, warping of the surface is likely to occur. one method of reducing the amount of warpage is to

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Using short strips of fibreglass in the bonded repair is one method of reducing warpage.

What is warpage?

Warpage is a recognisable unconventional bending or twisting out of the shape of a plastic part. Heating, cooling, or dampening can all be the cause of unnatural bends. The primary cause of warpage is moulded-in residual stress, which is caused by contrasting shrinkage in the moulded part's material. An average consumer can detect unusual bending or twisting without any technical knowledge. Unintentional bending can be avoided in a variety of ways, particularly if the moulded part was created through injection moulding. The most important part, however, is determining the cause of the warpage, which is frequently overlooked.

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