1. Drawing yarn: chemical rice grains are used to draw yarn through a process to determine the sample yarn thickness. Generally, the factory directly buys yarn cakes (this process is not completed in the factory).
2. Warping: Concentrate the dispersed yarn cakes on packages, and the number of packages is related to the yarn grains.
3. Twinning: Two or more bobbins are combined into one bobbin. For example, a 600D yarn can be formed by combining two 300D yarns.
4. Sizing: Sizing the yarn after merging to make the yarn stronger.
5. Warp splitting: The warp yarns are staggered up and down by the machine so that the weft yarns can pass through.
6. Knitting: There are two kinds of knitting and plain knitting, which mainly reflect the difference of thread.
Looms are: 1. Water jet loom is generally used for 600D weaving, and the cloth surface is relatively flat and uniform.
2. Air-jet loom: suitable for cotton cloth, canvas and other natural fibers.
Rapier loom
7 Dyeing: There are several methods:
1. Spray dyeing: cloth does not move. By moving the dye to spray on the cloth, this method is mainly used in the warp beam dyeing machine with high cost.
2. Flat dyeing: generally used for nylon. The dye will not move. This moving cloth dyeing method is mainly used in the jig dyeing machine, which is relatively cheap and large in quantity.
3. Crease dyeing: generally used for polyester, dyeing while moving cloth. This method is mainly used in RAPD high temperature dyeing machine.
Note: It is best to pay special attention to the color fastness of jet dyeing effect, and it does not contain azo through sun exposure, perspiration, washing and rubbing.
Note: Some color difference problems in dyeing mainly include: 1 cylinder difference: the same batch of fabrics has color difference in different cylinders (domestic fabrics often have this problem).
2. Batch difference: color difference caused by different batches.
3. The same bundle of cloth has color difference: general machine problems, such as domestic 600D/PE.
8. Setting: (Dyeing may cause fabric to wrinkle and shrink) Make the wrinkled fabric smooth by setting, and prevent the fabric from being skewed (especially plaid cloth).
9. Sizing: Apply a layer of glue to the veil to make it stronger.
10. water splashing: in order to prevent the cloth from seeping (this process is generally suitable for pu rubber soles).
1 1. Calendering and sanding: Calendering is to flatten the surface of the veil, while sanding is to make the surface of the veil hairy.
12. Bonding: There are different ways to use different primers.
The gluing process is generally completed in calender, foaming machine and gluing machine (PU machine). Whether PVC pressing or PU gluing, gluing is an essential process. If it is not handled properly, the finished fabric will degum.
PE/PVC primer size:
A: cold pressing: press the bottom of raw rubber again. After the bottom rubber is made, the bottom glued veil is bonded together by physical and chemical (pressure and heat) actions.
B: Hot pressing: the primer is pressed after melting, usually by heating.
Sizing of PU/AC/ Youli adhesive primer;
Scraping glue. By fixing a roller and moving the cloth, the roller of miscellaneous brands can be coated and rotated to contact the cloth, so as to coat the cloth (generally transparent glue, white glue, silver glue, gold glue and colored glue).
Note: Hot pressing is similar to scraping, but the interval between roller and cloth is different. Among them, the steps from drawing to weaving are cloth, weaving process, dyeing and calendering, sanding is dyeing and finishing process, and finally fitting. These are three basic processes.