1. Cotton loss of knitted fabrics: bleached 7-10%, light color 7-9%, medium and dark color 6-9%

2. Loss of cotton knitted fabric: bleached 7-9%, light color 6-8%, medium and dark color 5-8%

3. Loss of polyester knitted fabric: 4-6% (if the loss is larger, it indicates that the original

4. The possibility of the oil agent exceeding the standard)

5. Dyeing and damage of loose fabrics > tight fabrics.

6. Dyeing and damage of roving fabrics > spun yarn fabrics.

dyed yarn

4% of chemical fiber, 5% of T/C, 6% of CVC, 7% of combed cotton

Weaving:

Chemical fiber long fibers 0.3%,

Chemical fiber staple fiber 1.5%,

T/C combed raw material: 2%

CVC, cotton combed raw material: 2.5%

Dyed yarn: 3-6%

Attached:

The loss of the above common yarn is greater on this basis;

The shortage of bad raw material manufacturers (very common) is even greater on this basis;

The thicker the yarn, the poorer the quality of cotton short fibers and the greater the loss;

For the same specifications of raw materials, I used to be a well-known raw material supplier in Shanghai, and the loss was only 1.5%, while the loss of a company in Jiangsu was 4% (during weaving, flying fluff in one place), and the loss in the subsequent dyeing and finishing is also very different. big.

The smaller the order, the greater the loss. For example, for 15KG fabrics, it takes about 1KG for 3M to adjust the fabrics, and for 1500KG, it still uses 1KG to adjust the fabrics.

For yarn-dyed fabrics, the more colors, the greater the loss.

If different raw materials are intertwined, the greater the number of different raw materials, the greater the loss.

Dyeing and finishing

Water setting: 3-4%

Chemical fiber long fiber: 4.5-5%

Chemical fiber short fibers: 4.5-5.5%

T/C: 4.5-5.5%

CVC: 6-6.5% for dark colors, 6.5-7% for medium colors, 7-8% for bleached and light colors, the higher the proportion of cotton, the greater the loss

Cotton: Dark 7-7.5%, Medium 7.5-8%, Light 8-9%, Bleached 8-9%

Enzyme treatment: 2.5%

Trim: (cut width/original width/100 0.2)%

Resin: If it is based on the length of the fabric, there is basically no change; if it is based on the weight of the fabric, the weight of the fabric will increase, so the loss will be small.

Bristles: 1-2.5%

Sanding: 1-2.5%

After brushing, grinding, and trimming: 1-3% more

CVC velvet: the total loss of steamed yarn, weaving and grey cloth shearing is 11.5-13%

Dyeing and finishing of CVC velvet to the finished product: 11.5-13%

Floral grey or yarn-dyed CVC velvet water finish to finished product: 6-10%

Ordinary polar fleece dyed and finished product: 11-14%

Ultrafine fleece dyed and finished product: 15-19%

Dyeing and finishing of flower ash fleece: 10-12%

Double brush double fleece dyed and finished product: 4-6% on top

The loss of polar fleece needs to be woven with high wool to match the style of polar fleece, otherwise the loss will be very large.

Dyeing and finishing loss of fabric = (weight of blank fabric - weight of finished fabric)/weight of blank fabric*100%

Main factors of fabric dyeing and finishing loss

1. Removal of oil, wax, pectin, cottonseed husk and other ingredients on fabrics, yarns and fibers during bleaching and dyeing.

2. Breaking and falling off of free fibers on fabrics and yarns in dyeing and finishing, including raising and shearing in finishing.

3. Corrosion and dissolution of the fabric after various treatments such as acid reduction, alkali reduction, enzyme treatment, chemical washing, etc.

4. Shear damage in the fabric process: removing seam heads, making cylinder samples, etc. -

5. The loss of fabric quality problems: those that cannot be repaired can be repaired, and the losses of 2 and 3.4 can be repeated.

6. The resurgence of grey fabrics > the resurgence of finished products.

7. Dyes and auxiliaries are adsorbed on the fabric.

Personal summary:

1. Cotton loss of knitted fabrics: bleached 7-10%, light color 7-9%, medium and dark color 6-9%

2. Loss of polyester-cotton knitted fabric: bleached 7-9%, light color 6-8%, medium and dark color 5-8%

3. Loss of polyester knitted fabric: 4-6% (if the loss is too large, it indicates that the raw material oil may exceed the standard)

4. Dyeing and damage of loose fabrics > tight fabrics.

5. Dyeing and damage of roving fabrics > spun yarn fabrics.