Leather Footwear Industry Standard (1)

Sewing leather shoes

1 theme content and scope of application

This standard specifies the basic quality requirements for sewing leather shoes.

This standard applies to ordinary leather shoes made of sewing technology.

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

2 reference standards

GB2703 leather shoes industry terminology

GB3293 China shoes and shoe last series

GB3904 folding test method for footwear

GB3905 footwear wear test method

GB4689.4 determination of leather thickness

ZBY75007 leather shoes for inspection

ZBY8003 steel hooks for leather shoes

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

SG360 chrome tanned goat shoe upper leather

SG361 chrome tannin cashmere upper leather

ZBY45003 chrome tanned pig soft upper leather

3 product classification

It is made up of men, women and children with all kinds of sewing 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, SG360, SG361 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.

Upper leather (leather) pig noodles (leather) sheep noodles (leather) 1.0~1.81.0~1.50.9~1.2 0.9~1.41.0~1.50.7~1.2

Shoe lining (leather) 0.6~0.9 0.5~0.9

Outsole natural leather outsole (3.5~4.54.5~6.03.8~5.07.0~12.0) 3.0~3.83.5~5.52.8~4.05.5~10.0

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

Tolerance of location tolerances

Three quarter head Baotou length boots, rear shoes, height shoes, back height 1.02.51.5 front sole length outsole length 1.51.51.0 bottom width, rear seam askew heel height 1.51.00.5

4.8 the physical and mechanical properties of the outsole (except for natural leather) must meet the requirements of Table 3.

Table 3

Project index

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

Imitation leather bottom is less than 40

Wear resistance (abrasion mark length, mm) General requirements less than 10

SBS bottom is less than 16.

Hardness Shahr A non porous bottom 55~72

Imitation leather 75~90

Shaw W micro hole bottom 40~65

Note: the shoes below 23 are not subject to folding resistance.

4.9 the heart should conform to the ZBY78003 requirement.

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

The serial number 1,6,7,8,9 is the main item, and the others are minor items.

Table 4

Item No. 1 qualified product

The color and thickness of the 1 surface leather are basically the same as those of the double shoes.

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

Allow slightly slightly loose and not obvious bright boil and blood tendon, but do not allow split face with the same color, thickness, grain size, and fluff thickness of the same shoes.

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

Allow slight loosening and bright boil, blood tendon, whip flower and other defects, but no split face.

2 the outsole has the same color, pattern and thickness as that of the same pair of shoes.

The minor parts of the skin are allowed to have slight defects. The color, pattern and thickness of the same parts of the double shoes are slightly different.

There are slight defects in the front part of the skin.

3 the upper line is basically neat.

The needle is uniform, and the tightness of the bottom and the surface is basically the same. There are no jumps in the main parts.

No obvious jumping parts are allowed.

A minor needle and a heavy needle are allowed for a minor part. No more than two shoes per shoe.

4 hem, chisel and chisel are basically uniform, neat and symmetrical.

No split edges are basically uniform, neat and symmetrical.

Allowed to have slightly cracked edges.

5 the fittings are firm and basically symmetrical.

6, the bandages are straight and uniform, which are basically the same as those of the same pair of shoes.

The 7 stitches are uniform and uniform in the inner and outer lines of the seam. No jumping or missing needles are allowed.

8 hard main and inner Baotou hardness is appropriate, no shrinkage deformation.

9 the heel assembly is firm and smooth. The size and height are symmetrical and firm, basically symmetrical.

10 shoes inside and outside clean and smooth, basically solid, basically symmetrical.

11 the layering and the bottom are tightly combined without gaps.

5 test method

5.1 visual inspection

Press ZBY75007.

Examination

Press ZBY75007.

5.2 physical and mechanical performance test

5.2.1 outsole flexural performance test GB3904.

5.2.2 wear resistance test for outsole GB3905.

5.2.3 outsole hardness test: press the hand pressure Shahr hardness tester at constant speed on the sole flat, press the reading value immediately after pressing (test ambient temperature; 23 + 2 degrees Celsius); at least three points, the arithmetic average value is the test result, the effective digit to one digit.

5.3 component thickness measurement

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

The remaining thickness of 5.3.2 is measured by thickness gauge or vernier caliper (accuracy + 0.02mm).

6 inspection rule 6.1. The appearance quality of the finished products should be checked by double inspection.

6.2 physical and mechanical properties should be tested at random for three pairs of shoes every day (resistance to bending, wear resistance and the same batch of molding bottom). Each test shoe meets the requirements of Table 3. If the first test fails to meet the requirements, it may be re sampled, and its unqualified items can be retested.

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 are not up to the quality of shoe degradation.

7 marks, packaging, pportation and storage

7.1 mark

7.7.1 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;

Number;

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 keep the ventilation dry in the warehouse, and the product is above 0.2m and the floor.

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.

Adhesive leather shoes

1 theme content and scope of application

This standard specifies the basic quality requirements for adhesive shoes.

This standard applies to general leather shoes made of adhesive technology.

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

2 reference standards

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 inspection methods for leather shoes and leather shoes

ZBY78003 leather shoes

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

SG360 chrome tanned goat shoe upper leather

SG361 chrome tannin cashmere upper leather

ZBY45003 chrome tanned pig soft upper leather

3 product classification

It is divided into male and female adhesive boots and shoes.

4 technical requirements

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

4.2 shoe upper leather should be selected according to SG355, SG356, SG358, SG359, SG360, SG361 and ZBY45003 technology.

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.

Upper leather (leather) pig noodles (leather) sheep noodles (leather) 1.0~1.81.0~1.50.9~1.2 0.9~1.41.0~1.50.7~1.2

Shoe lining (leather) 0.6~0.9 0.5~3.8

Outsole natural leather outsole (3.5~4.54.5~6.03.8~5.07.0~12.0) 3.0~3.83.5~5.52.8~4.05.5~10.0

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.

The 4.6 generation

Refer to the 4.5 and 4.4 requirements of the material.

4.7 all parts of the same pair of shoes are shown in Table 2.

Table 2 mm

Tolerance of location tolerances

The length of the front leg is three head, the length of the Baotou shoe is 1.51.01.5, the height of the outsole is 2.51.51.0, the width of the outsole is 2.51.51.0, the thickness of the outsole is the thickness of the rear seam, and the height of the heel is askew.

4.8 the physical and mechanical properties of the outsole (except for natural leather) must meet the requirements of Table 3.

Table 3 mm

Project index

Folding resistance (pre cut 5mm, continuous flexion 40 thousand times, split length, mm) generally requires leather imitation less than 12 or 40.

Wear resistance (wear mark length, mm) general requirement SBS bottom is less than 10 or less than 16.

Peeling strength (N/cm) is greater than 54 or equal to 49.

Hardness Shahr A non porous bottom 55~72

Imitation leather 75~90

Shaw W micro hole bottom 40~65

Note: the shoes below 1 and 23 are not subject to folding resistance.

2. Peel strength is not tested, and peel strength is not assessed.

3. When women shoes appear in the following circumstances, the strength of peeling is not less than 40N/cm.

The skin is leather, synthetic and so on.

The thickness of the bottom is greater than or equal to 3mm.

The width of the outsole at the 20mm end of the shoe outsole is less than or equal to 40mm.

4.9 the heart should conform to the requirements of ZBY78003.

4.10 the appearance quality should comply with the requirements of Table 4, and the serial numbers 1, 5, 6, 8 and 9 are the main items.

Project.

Table 4

Item No. 1 qualified product

The color and thickness of the 1 surface leather are the same as those of the double shoes, the grain size and the thickness of the fluff are basically the same. The former is better than the latter, and the outer side is better than the inside side.

Allow slightly slightly loose and not obvious bright boil and blood tendon, but do not allow split face with the same color, thickness, grain size, and fluff thickness of the same shoes.

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

Allow slight loosening and bright boil, blood tendon, whip flower and other defects, but no split face.

2 the hem is basically neat and uniform along the mouth, and no crack edges are allowed to be uniform.

3 the upper stitch line is neat, the needle is uniform, the bottom line tightness is the same, the main obvious parts are no stem and jumper.

The minor part jumpers and heavy needles allow one stitch, and no more than two shoes per shoe.

4 the fittings are firm and basically symmetrical.

5 the bandages are straight and uniform.

Basically the same position with the same pair of shoes.

6 hard main and inner Baotou hardness is appropriate, no shrinkage deformation.

7 the outsole has the same color, pattern and thickness as that of the same pair of shoes.

The minor part of the skin is allowed to have slight defects, which is basically the same as the color, pattern and thickness of the same parts.

8 heel assembly is firm and smooth.

Symmetry of size and height

9 adhesive no glue phenomenon

10 shoes inside and outside clean and smooth, basically solid, basically symmetrical.

5 test method

5.1 visual inspection is carried out according to ZBY75007.

5.2 physical and mechanical performance test

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

The 5.2.2 outsole flexural performance test is carried out according to GB3904.

Wear resistance test of 5.2.3 outsole is carried out according to GB3905.

5.2.4 outsole hardness test: press the soles on the soles flat at the constant pressure of the Shaq hardness tester, immediately after pressing.

Table value (test ambient temperature: 23 + 2 c), at least three points, the arithmetic mean is the test result.

Valid digit to bit.

5.3 component thickness measurement

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

5.3.2 thickness gauge or vernier caliper for other thickness (accuracy + 0.0.2)