7. Towards 4D printing
Ground or inlay yarn can be a shape-memory thread, in which case
it is sensitive to certain stimuli such as temperature, electric current
or light. Its shape then evolves over time, which is known as 4D printing
[10511]
.
Figure
28
shows
an example of a knitted fabric with shape-memory inlay insertion.
Initially flat, the knitted fabric is deformed and then returns to
its initial shape under the effect of temperature.
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Towards 4D printing