Construction first
Review Yarn Construction before treating TPM as a stand-alone requirement.
Technical reference
TPM in Metallic and Zari Yarn
TPM means twists per metre: a shared way to describe the twist level in a yarn requirement.
What does TPM mean in yarn?
TPM stands for twists per metre. It measures the amount of twist in a length of yarn and is considered as part of yarn construction. TPM does not define a complete yarn by itself: twist direction, construction and intended application provide the context needed to interpret a requirement.
TPM provides a common reference when buyers and suppliers discuss yarn twist. Twist level can influence how a yarn is considered alongside its construction and intended application, so the term is useful only in the wider product context.
TPM requirements should be defined according to yarn construction, application, process and buyer specification. This page does not prescribe a TPM value, range or machine-specific setting.
Twist direction
Twist adds direction to the technical conversation.
Use this reference before a buyer specification
State the product category, application, construction information already known and any sample reference. A buyer can then identify whether TPM is specified, requested for review, or still to be discussed as part of the technical brief.
Sampling supports validation against the intended textile use; it is more useful than assuming a twist level will deliver a particular result.
What does TPM mean in yarn?
TPM means twists per metre. It describes the twist level as one input in a yarn specification.
Should a buyer specify a fixed TPM?
Only when it is part of the approved requirement. Otherwise, discuss the application, construction and sample need so the specification can be reviewed in context.