1 Scope
This part of GB/T 4802 specifies a method for determination of the resistance to pilling and surface change of textile fabrics using a modified Martindale method.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 12945. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of GB/T 4802are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 6529 Textiles — Standard atmospheres for conditioning and testing. (GB/T 6.529—2008，ISO 139：2005，MOD)
GB/T 21196.1 Textiles — Determination of the abrasion resistance of fabrics by the Martindale method — Part 1: Martindale abrasion testing apparatus. (ISO 12947-1：1998，MOD)
3 Terms and definitions
For the purposes of this part of GB/T 4802 the following terms and definitions apply.
3.1 fuzzing
Roughing up of the surface fibers and/or teasing out of the fibers from the fabric, producing a visible surface change.
Note: This change can occur during washing, dry cleaning and/or wearing.
3.2 pills
Entangling of fibers into balls (pills) which stand proud of the fabric and are of such density that light will not penetrate and will cast a shadow
NOTE This change can occur during washing, dry cleaning and/or wearing.
3.3 pilling
Generation of pills over the surface of the fabric
3.4 pilling rub
One revolution of the two outer drives of the modified Martindale abrasion machine
3.5 pilling cycle
Completion of the translational movements tracing a Lissajous figure comprising 16 rubs, i.e. 16 revolutions of the two outer drives and 15 revolutions of the inner drive of the Martindale abrasion tester
