Knitting Procedures For Seamless Knitted Underwear

Knitting procedures for seamless knitted underwear

Direct contact with the skin, so the performance of its clothing is particularly important.

Silk has good hygroscopicity and antistatic properties, and its protein composition is similar to human skin, so it feels soft and comfortable when wearing.

In addition, tryptophan and tyrosine in silk fibers can absorb ultraviolet rays, which can effectively prevent the skin from being attacked too much.

Although cellulose fibers, such as cotton and hemp, are also natural fibers, their moisture absorption is good. They are also comfortable as seamless knitwear, but their softness and touch are far less than that of seamless knitted fabrics.

Silk has the natural health function that other fibers can not match, so silk seamless products have great market space and will put people into a new field of clothing.

Weaving equipment and parameters

equipment

The SM8-TOP2 type electronic seamless forming and knitting circular knitting machine manufactured by Italy San dony company is currently used by many knitting enterprises in China. It is a single side computer knitted jacquard machine with eight sides into the yarn, and each side has two independent flower drum (i.e. needle selector), each of which can carry out 3 stages of knitting at the same time (that is, three different movements of ring picking and floating line) at the same time.

parameter

The electronic seamless forming circular knitting machine has a cylinder diameter of 30-40cm (12-16 inches); the speed 110r/min device is 2 for each road; the inlet yarn path is 8 way yarn; the knitting circular machine power is 2.2kW, the suction motor motor power is 3.9kw; the yarn guide device is 8 / Road (less than 8 in practical application).

Pre-processing

Because silk has sericin and large rigidity, it is easy to produce brittle defects and needle breakage during weaving. So before weaving, it needs to be treated before weaving.

If you use a general polyester factory's stranded wire, you need to go through the following process: put the twisted raw silk in a solution containing softeners, such as ENS and foaming agent (such as HV-302), bathing at 1:20 or 40-50 degrees Celsius, soaking for 18 hours, drying, winding and knitting again.

If the raw raw silk directly supplied by factory is used, it is necessary to put the raw silk in the vacuum container containing the treatment solution (commonly used in the sago oil solution with bath ratio of 1:10109/L) at room temperature, so that the treatment solution can quickly penetrate into the inner layer and sericin of the package and finish the machine weaving.

Weaving process and technical points

The production of seamless products with real silk has high technical requirements. The knitting process is generally carried out through three steps: sample analysis, program design and machine commissioning.

Sample analysis

It mainly includes dimensional analysis, color analysis, raw material analysis and fabric structure analysis.

The program is designed to determine the yarn and the number of threads. According to the choice of the yarn and the number of threads, the program is programmed in the special programming system.

The choice of the yarn must be determined according to the performance of the machine. The front spun yarn is in the inner layer, and the back yarn is on the outer layer. When the fabric is coated with some material to cover another material, the sand mouth should be chosen according to the need.

Debugging on board

After the programming is done, the machine will be debugged. In this process, the size should be strictly controlled, and the procedure should be revised again and again until the requirements are met.