Heating wire:

1: Apperance: Smooth, no scratch, no combustion, no stains, consitent color

2: Size and Structure: Diamater, thickness,

3: Resistance

4: High voltage testing) 1500VAC/3000VAC, 1 min

5: Bending test

5: Fireproof testing

6: High temp resistance testing

7: Certificate testing

PU:

1: Apperance: Color, grain, no spot, no damage, no color difference, no smelling

2: Size and Gramweight

3: Physical performance :Tearing strength, wearing -resisting property, color fastness, pilling testing, breathability

4: Fire resistance

5. Environmental protection property

Electronic components (Thermostat and Temp Sensor)

1: Appearance: no damage, mark clearly,

2: Size and structure

3: Function testing: Turn off and on, Accuracy, indicator light, service life, electricity behavior( resistance testing),

4: Fire resistance

PCB board:

1: Appearance: no damage, no fauty solder, no solder skip, continuous tin

2: Size and structure

3: Solderability

4: Function testing

5: Certificate checking