Industrial sectors such as clothing, industry, agriculture, military demand, transportation and so on. In the 1930s, the webbing was produced in hand-made workshops, and the raw materials were cotton thread and hemp thread. After the founding of New China, the raw materials for webbing have gradually developed into nylon, vinylon, polyester, polypropylene, spandex, viscose, etc., forming three main types of process technology: weaving, braiding, and knitting. Double-layer, multi-layer, tubular and joint organizations.
Weft and weave. After being twisted, the yarn is warped to make a bobbin (pan head), and the weft yarn is shaken into a bobbin, which is woven on a loom. In the 1930s, weaved ribbons for hand-drawn wood looms and iron-wood looms. In the early 1960s, the 1511 loom was converted into a ribbon loom, which is still widely used. Because the width of the tape is small, the weaving method is different. There are single, double, and dozens of strips. There are single layers and double layers.
In 1967, the industry’s worker-based shuttleless webbing research group successfully designed and manufactured its own high-speed single shuttleless webbing machine, realized that the webbing does not require shuttle, and the process is shortened, the area is small, the labor productivity is improved, it is China. Pioneering in the history of webbing technology.
In the 1970s, due to the promotion of the continuous dyeing and ironing machine for ribbons, the processing of colored ribbons developed from the traditional process of dyeing and weaving to weaving and dyeing, weaving and bleaching, continuous ironing and post-processing, and the webbing technology entered mechanization The ranks of large production. In the early 1980s, the industry introduced Swiss, Italian, Federal German high-speed shuttleless loom, ironing combined machine, wrapping machine, warping machine, etc., and the webbing technology entered a new development stage.
The advancement of webbing technology has brought about product upgrading. In 1979, the trial production of the first-generation SD9-9 type rubber ingots and belts in China was successful, making the history of rubber ingots and belts dependent on imports. In 1980, SD-81A and B-type rubber ingots were developed with the characteristics of softness, lightness, thinness, firmness, small elongation, low impact force, and short and flat joints. At the beginning of 1990, the trial production of car seat belts for Santana cars was successful. After more than two years of research and organization and trial production, the product quality has reached QC49-92 and TL-VW470 standards.
Second、weaving (spin weaving)
After the yarn meridian tube and the weft are formed into a weft tube, it is inserted into the fixed tooth base of the knitting machine, and the weft tube rotates along an 8-shaped track to pull the yarn to cross-weave each other. Usually the number of ingots is even, the tape is woven into a tube, the number of ingots is odd, and the woven tape is flat. The spindle weaving process has been applied since old China. The number of spindles varies from 9 to 100 spindles depending on the equipment. The basic process of weaving is: bleaching and dyeing-wefting-weaving-drop machine cutting-packaging. Since 1960, we have carried out many technological innovations on the weaving machine, mainly including the enlargement of the diameter of the peach board, the installation of the automatic stop device for the broken rubber, and the change of the iron ingot to the nylon ingot. Improvements in these devices have increased the vehicle speed to 160 to 190 rpm, doubled the stand rate, and greatly improved the quality of the product.
Not only can weave the ribbon, but also the rope. Tubular belt is a kind of braided rope. It is called rope or rope with a diameter of 1 to 4 cm. It is also called rope when its diameter is greater than 4 cm. It is generally called a cable or rope when its diameter is greater than 40 cm. In 1989, the industry introduced Japanese eight-strand cable production line equipment and produced polypropylene eight-strand cable in the following year, and the product won the National Silver Award.
In the 1970s, knitting warp knitting and weft knitting techniques have been widely used in webbing. In 1973, the trial production of knitted wide nylon tight belts was successful. In 1982, the Italian crochet machine was introduced with advanced technology and a wide range of production, especially suitable for thin decorative fabrics such as laces, elastic bands, window screens, decorative bands, etc. The basic technological process is: bleaching and dyeing-winding-weaving-ironing-packaging.
Before the 1970s, the fire hose blanks were woven with a flat loom, the caliber size of the blanks was greatly deformed, and the output was low. In the second half of 1974, the industry organized the tube blank weaving development group, based on the principle of knitting, using warp and weft weaving, relying on the looping yarn during the looping process, using the cylinder and sinking arc of the looping yarn, the non-interwoven warp and weft yarn Linked into a whole, it becomes warp and weft-inserted tubular knitted fabrics, and the production technology level of the product coated water pipes and high-pressure fire hoses ranks first in the country.