HECOL370 Lecture Notes - Lecture 6: Presser Foot, Glass Transition, Electrical Resistance And Conductance

• School: University of Alberta
• Department: Human Ecology
• Course: HECOL370
• Professor: Jane Batcheller

Document Summary

Lecture 6 & 7: index tests & tests environment. Purpose check or verify the identity of a textile product determine its nature or construction eg. bre content, thickness, mass, structure. Fibre content is the rst thing that must be known about a textile material. In this course, bre content will be provided on product labels. For some labs, bre content will be con rmed through microscopic observations. Want to determine mass in grams/square metre of fabric, not linear metre. Cut without conditioning: (don"t bring to moisture equilibrium before we cut them) Area of each specimen is slightly less than 20 cm2. Want to determine thickness in mm at selected pressure of 1kpa. Some fabrics are much more compressible than others. Dial of thickness gauge reads in inches; convert to mm by multiplying by 25. 4. Presser foot diameter is 28. 99 mm (specimen diameter is 50 mm) Follow method c, using a traversing thread counter.