QB/T 4556-2023Snow boots (English PDF)

5.3.4 Low-temperature folding resistance of the upper surface material

The low-temperature folding resistance of the upper surface material shall meet the

requirements of QB/T 2224-2012 for qualified products.

5.3.5 Low-temperature folding resistance of the sole

The low-temperature folding resistance of the sole shall meet the requirements of QB/T

4886-2015 for qualified products.

5.3.6 Friction color fastness of lining and insole

The staining shall not be less than level 2 ~ 3 (dark fur and dark artificial fur shall not

be less than level 2).

5.3.7 Cold resistance

Within 30 minutes, the temperature of the inner cavity of the shoe shall not drop by

more than 10 °C.

5.3.8 Anti-slip performance

The wet dynamic friction coefficient shall not be less than 0.30.

5.3.9 Microporous bottom compression deformation

The single-layer microporous bottom compression deformation of a single density shall

be not more than 30%.

5.4 Odor

The odor level of infants' snow boots and children's snow boots shall be not more than

level 2.

7.1 Sensory quality

Test according to GB/T 3903.5.

7.2 Peel strength

Test according to GB/T 3903.3, using a blade width of (10 ± 0.2) mm. Measure the toe

or heel during the test. When the toe and heel cannot be peeled, test the side of the shoe

instead. If both cannot be tested, do not perform this item.

7.3 Folding resistance

Test according to GB/T 3903.1, without cutting; perform 40000 folds continuously.

7.4 Wear resistance

Tested in accordance with GB/T 3903.2. When testing the wear resistance of the outer

sole of the foam material of children's snow boots, the surface dense layer is not

polished. If the flat area does not meet the test requirements, no test is performed.

7.5 Low-temperature folding resistance of upper materials

Tested in accordance with QB/T 2224-2012. If the specimen area does not meet the

sampling requirements, materials from the same batch can be tested.

7.6 Low-temperature folding resistance of soles

Tested in accordance with QB/T 4886-2015.

7.7 Friction color fastness of lining and insole

7.7.1 Take lining and insole materials as specimens. If there is no lining, the contact

surface between the upper and the foot is tested as the lining. If the specimen area does

not meet the sampling requirements, materials from the same batch can be tested.

7.7.2 Fur and artificial fur shall be tested according to method C in QB/T 2882-2023,

wet rubbed 10 times; according to the provisions of GB/T 4841.3, the color darker than

1/12 of the standard depth of dyeing shall be considered dark. Other materials shall be

tested according to method A in QB/T 2882-2023, wet rubbed 50 times. The gray scale

shall comply with the provisions of GB/T 251.

7.8 Cold resistance

The cold insulation test shall be carried out according to GB/T 21284-2015; the test

results of the left and right feet of the same pair of shoes shall be expressed separately.

7.9 Anti-slip performance

The test shall be carried out according to GB/T 3903.6; the medium shall be grade 3

water; the interface shall be ceramic tile; the test mode shall be horizontal mode; the

result shall be the wet dynamic friction coefficient of the specimen; the lower value of

the left and right feet of the same pair of shoes shall be taken as the final result.

7.10 Microporous bottom compression deformation

Appendix A

(Informative)

After-sales quality assessment

A.1 After-sales service period

It can be determined by the enterprise according to the product grade, in accordance

with the national or local three-guarantee policy, meanwhile clearly stated in the after-

sales service provisions.

A.2 After-sales quality judgment

In the case of normal wear within the after-sales service period, the following problems

can be judged as quality problems:

a) Failure to meet the quality requirements specified in this document;

b) Upper cracks, upper foot breakage, severe white frost, discoloration, front upper

coating falling off;

c) Open thread and open glue;

d) Main heel or toe cap deformation;

e) Heel deformation, cracks, breakage or fall off, heel fall off;

f) Lining and insole obvious discoloration contaminate socks, lining and insole wear;

g) Outsole or insole cracks, breakage or unevenness, affecting wear;

h) Waist strips are open-glued or broken;

i) Protruding nail tips (heads) inside the shoe, uneven inside the shoe, affecting wear;

j) Upper decorations fall off;

k) Other defects or quality problems that affect wear.

A.3 Inspection method

A.3.1 If the quality requirements specified in this document are not met, the inspection

method specified in this document shall be used. The sensory inspection shall be carried

out in accordance with the provisions of GB/T 3903.5.

A.3.2 Decolorization: Use white absorbent cotton or gauze soaked with clean water (no

water dripping when pressed by fingers) to rub the inner side of the upper surface 10

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