Hot melt yarn typically does not expand or shrink significantly with heat. The term "hot melt" refers to the yarn's ability to melt and fuse at elevated temperatures rather than undergoing changes in size.
When exposed to heat, hot melt yarn softens and becomes pliable, allowing it to bond with other materials or fabrics during the activation process. However, this change is related to the yarn's melting and bonding properties rather than expansion or contraction in terms of size.
The melting point of hot melt yarn is carefully engineered to facilitate bonding without causing substantial changes in the yarn's dimensions. Manufacturers consider the specific application requirements and the materials with which the yarn will bond to ensure that the melting process occurs effectively without causing unintended alterations in size.
While hot melt yarn becomes malleable and bonds with heat, it is not designed to undergo significant expansion or shrinkage as part of its normal behavior during the melting and bonding process.
