Vehicle seat trim covers including integrally-knit backing materials and methods of manufacturing vehicle seat trim covers

The A trim component for attachment to a seat of a vehicle, the trim component comprising:

• a first portion disposed on a first side of the trim component, the first portion being knitted and including a first yarn, the first yarn being a heat-activated yarn;
• and
• a second portion disposed on a second side of the trim component, the second portion being integrally knitted with the first portion and including a second yarn, the second yarn being distinct from the first yarn, wherein:
• the trim component is configured to be installed on a support member of the seat;
• the first side is configured to face the support member;
• the second portion is configured to communicate with an occupant of the seat;
• the heat-activated yarn includes core and a shell at least partially enclosing the core;
• the core includes a first composition;
• the shell includes a second composition configured to melt when the heat-activated yarn is heated above a predetermined temperature;
• the first composition is released from the shell when the second composition melts;
• and
• the first composition is configured to react with a third composition to form a thermosetting polymer.

A trim component for attachment to a seat of a vehicle, the trim component comprising:

• a first portion disposed on a first side of the trim component, the first portion defining a first knit and including a first yarn;
• a second portion disposed on a second side of the trim component, the second portion being integrally knitted with the first portion and defining a second knit distinct from the first knit, the second portion including a second yarn that is distinct from the first yarn with respect to one or more of density, thickness, and material;
• and
• a third portion disposed between the first portion and the second portion, the third portion including a third yarn and being integrally knit with the first portion and the second portion, wherein the first yarn is a heat-activated yarn, wherein:
• the trim component is configured to be installed on one or more support members of the seat;
• the first side is configured to face the support member;
• and
• the second portion is configured to communicate with an occupant of the seat.