Leather Shoes Industry Standard (2)

Leather shoes industry standard (2)

Vulcanized leather shoes

Topic content and scope of application

This standard stipulates the basic quality requirements of vulcanized rubber sole leather shoes.

This standard applies to vulcanized rubber shoes made of vulcanizing technology.

This standard does not apply to leather shoes for labor protection.

Reference standard

GB2703 leather shoes industry terminology

GB3293 China shoes and shoe last series

Test method for peel strength of GB3903 leather shoes

GB3904 folding test method for footwear

GB3905 footwear wear test method

GB4689.4 determination of leather thickness

ZBY75007 footwear testing methods

SG355 chrome tanned pig upper leather

SG356 chrome tanned pig suede upper leather

SG357 chrome tanned pig shoe upper leather

SG358 chrome tanned yellow shoe upper leather

SG359 chrome tanned cattle shoe upper leather

ZBY45003 chrome tanned pig soft upper leather

3 product classification

It is divided into male, female and child vulcanized leather boots and shoes.

4 technical requirements

4.1 shoe numbers and shoe last should meet the requirements of GB3293.

4.2 shoe upper leather shall be selected according to the technical requirements of SG355, SG356, SG357, SG358, SG359 and ZBY45003.

4.3 donkey, horse and Camel Leather material refer to the technical requirements of cattle leather.

4.4 the thickness of the main parts shall be selected in the range specified in Table 1.

Table 1 mm

Men's shoes, women's shoes and children's shoes.

Shoe upper cattle (leather) pig in * (leather) 1.0~1.81.0~1.5 1.0~1.81.0~1.5

Shoe lining (leather) 0.6~0.9 0.5~0.8

Outsole 5.0~7.0 3.5~6.0

4.5 the thickness of the outsole refers to the thickness of the front part, and the depth of the pattern should not exceed 1/3 of the thickness of the outer sole.

4.6 substitute materials can refer to 4.2 and 4.4 requirements.

4.7 the allowance for each part of the pair of shoes is shown in Table 2.

Table 2 mm

Location tolerance difference location tolerance

The length of the front shoe is higher than that of the shoe. The height of the outsole is 1.52.51.52.0, the width of the bottom is longer, the back seam is skewed, and the heel height is 1.52.01.5.

4.8 the physical and mechanical properties of the outsole must meet the requirements of Table 3.

Table 3

Project index

Folding resistance (pre cutting 5mm, continuous flexing 40 thousand times, length of crack), abrasion resistance (abrasion length, mm) peel strength (N/cm) hardness (shor A) less than 12, less than 10, or greater than 5955~72

Note: 1, the strength of the Striped shoes is not measured.

2, shoes below 23 are not subject to folding resistance.

4.9 the appearance quality should comply with the requirements of Table 4.

Among them, serial numbers 1 and 8 are the main items, and others are minor items.

Table 4

Item No. 1 qualified product

The 1 surface leather is basically identical with the color, thickness, grain size and fuzz thickness of the same parts.

The former is better than the latter, and the outer side is better than the inside side.

Allowable slight loosening and other defects, but not affecting the wearing and appearance, allow for slight differences in color, thickness, grain size, and fluff thickness of the same parts of the same pair of shoes.

The former is better than the latter, and the outer side is better than the inside side.

It allows slight loosening and other defects, but does not seriously affect wear and beauty.

2 the seam and the seam of the middle seam seams are tidy, the tightness of the bottom and the surface is the same, and the minor parts are jumper and heavy needle allowing one stitch. Each shoe should not exceed two.

3 the discount and scorching of the feet are allowed to be slightly discounted. No scorching is allowed.

4 the fittings are firm and basically symmetrical.

5 the pulp is basically uniform, not higher than 3mm, not less than 1mm, not higher than 5mm, not less than 1mm

The girth height is basically uniform, not less than 1mm, not higher than 3mm, not less than 1mm, not higher than 5mm

No obvious wrinkle is found in the underside.

Even the edge void is not more than 3mm allowed, but affects the wearing.

Edge void does not exceed 5mm

The outer part of the bubble is not allowed to bend at the front palm, and other parts are allowed to exist slightly.

Sticky touch allows slight sticky touch, but the pattern is basically clear, symmetrical, but not seriously affected.

Skew, over sulphur, sulphur, frost and glue are not allowed to be opened, and other defects are allowed to exist slightly.

5 test method

5.1 visual inspection

Press ZBY75007.

5.2 physical and mechanical performance test

5.2.1 peel strength test was carried out according to GB3903 (knife edge width 10mm).

5.2.2 outsole flexural performance test GB3904.

5.2.3 wear resistance test for outsole GB3905.

5.2.4 outsole hardness test: press the hand pressure Shahr hardness tester at the flat bottom of the soles, press the reading value immediately after pressing.

Test the ambient temperature; 23 + 2 degrees C), at least three points, the arithmetic average is the test result, the effective digit to the digit.

5.3 component thickness measurement

5.3.1 the thickness of leather is determined by GB4689.4.

5.3.2 the rest thickness is measured by thickness gauge or vernier caliper (accuracy + 0.02mm).

6 inspection rules

6.1 the appearance quality of the finished products should be checked by two tests.

6.2 physical mechanical properties should be tested with three pairs of shoes at random every day. Peel strength test is done first and then other project tests are conducted.

Each test shoe accords with the requirements of Table 3. If the first test fails to meet the requirements, the sample can be re sampled and retested for its unqualified items.

If the results of the reinspection are not qualified, the products will be demoted.

6.3 there are 4 major items in Table 4 or three sub items that fail to meet the quality requirements.

7 marks, packaging, pportation and storage

7.1 mark

7.1.1 each pair of shoes should be marked as follows:

Manufacturer's name or registered trademark;

Shoe size and shoe type;

The quality grade and the corresponding standard (that is the standard) number;

Inspection chapter.

The above contents should be marked in the 7.1.2 package.

Manufacturer's name or registered trademark;

Product name;

Shoe size and shoe type;

The quality grade and corresponding standards (that is, this standard) are numbered;

The color of shoes.

7.1.3 the outer package should indicate the above contents.

Name of manufacturer;

Product name;

Registered trademark;

Shoe number;

The quality grade and the corresponding standard (that is the standard) number;

The color and quantity of shoes;

Box number, gross weight, volume, packing date;

Storage and pportation requirements, signs, etc.

7.2 packaging, pportation and storage

7.2.1 cardboard boxes should be packed, and moth proofing and mildew proofing agents can be added when necessary.

7.2.2 corrugated boxes or wooden boxes for outer packing, and moistureproof paper when necessary.

7.2.3 pportation and storage shall not be weighed, moistened, rained, exposed to sunlight or with corrosive substances such as oil and acid or alkali.

7.2.4 warehouse must be kept dry and ventilated, and the product is more than 0.2 from the ground and wall.

7.2.5 storage time should not exceed one year.

Check the box once a season, and strengthen moisture-proof, anti injection and anti mould measures when necessary.

7.3 other requirements for marking, packaging, pportation and storage are agreed upon by the buyers and sellers.

Molded leather shoes

Topic content and scope of application

The standard specifies the basic quality requirements for rubber shoes.

This standard applies to rubber sole shoes made of moulded technology.

Molded leather shoes with other materials can be referenced.

This standard does not apply to leather shoes for labor protection.

Reference standard

GB2703 leather shoes industry terminology

GB3293 China shoes and shoe last series

Test method for peel strength of GB3903 leather shoes

GB3904 folding test method for footwear

GB3905 footwear wear test method

GB4689.4 determination of leather thickness

ZBY75007 cloth shoes into shoes inspection methods

SG355 chrome tanned pig upper leather

SG356 chrome tanned pig suede upper leather

SG357 chrome tanned pig shoe upper leather

SG358 chrome tanned yellow shoe upper leather

SG359 chrome tanned yellow cattle modified leather

ZBY45003 chrome tanned pig soft upper leather

Product classification

It is divided into men, women and children with all kinds of molded boots and shoes.

technical requirement

4.1 shoe numbers and shoe last should meet the requirements of GB3293.

4.2 shoe upper leather shall be selected according to the technical requirements of SG355, SG356, SG357, SG358, SG359 and ZBY45003.

4.3 donkey, horse and Camel Leather material refer to the technical requirements of cattle leather.

4.4 the thickness of the main parts shall be selected in the range specified in Table 1.

Table 1 unit: mm

Men's shoes, women's shoes and children's shoes.

Upper leather (leather) pig noodle (leather) 1.0~1.81.0~1.5 0.9~1.41.0~1.5

Shoe lining (leather) 0.6~0.9 0.5~0.8

Outsole 5.0~7.0 4.0~6.0

4.5 the thickness of the outsole refers to the thickness of the front part, and the depth of the pattern should not exceed 1/3 of the thickness of the outer sole.

4.6 substitute materials can refer to 4.2 and 4.4 requirements.

4.7 the allowance for each part of the pair of shoes is shown in Table 2.

Table 2 unit: mm

Tolerance of location tolerances

The length of the front shoe is higher than that of the shoe. The height is 1.52.51.5, the length of the outsole is 1.51.01.5, the rear seam is skewed, the heel is high and the 1.50.5 is thick.

4.8 the physical and mechanical properties of the outsole must meet the requirements of Table 3.

Table 3

Project index

Folding resistance (pre cut 5mm, continuous flexion 40 thousand times, split length, mm) less than 12

Wear resistance (length of wear marks, mm < 10)

Peel strength (N/cm > 59)

Hardness (shor A) 55~72

Note: 1, the strength of the Striped shoes is not measured.

Footwear below 2,23 is not subject to folding resistance.

4.9 the appearance quality should comply with the requirements of Table 4, of which the serial number 1,5,9 is the main item and the others are minor items.

Table 4

Item No. 1 qualified product

The 1 sides of leather are basically the same as those of double shoes in terms of color, grain size and fluff thickness.

Allow slight slight loosening and bright furuncle and blood tendon, but no split face and double shoes are allowed to have a slight difference in color, thickness, grain size and fluff thickness. The former is better than the latter, and the outer side is better than the inside side.

Allow slight loosening and light furuncle, blood tendon and whip flower to wait for defects, but no split surfaces should be allowed.

3 the ruffled edge is basically neat and uniform. No crack movement is allowed.

3 the upper stitch line is basically neat, and the bottom line is tight. There are no jumps and heavy needles in the main parts. There are no more than two needles in the secondary parts.

4 the fitting line is basically neat, the bottom line tightness is the same. There are no jumps, heavy needles, minor parts, and no more than two needles.

5 the bandage is firm and basically symmetrical.

6 the pulp is basically neat, not higher than 3.

7 the exposed fiber is not higher than 1.

5 not higher than

8 the outsole lacks glue and bubbles should not be allowed to exert any force. The secondary parts allow two, and the length should not exceed 2.