Editor's Note: The pattern decoration on knitted cashmere (brown) shirts mainly includes printing, embroidery, nailing and hooking. Among them, the printing process refers to the process of directly printing a certain color pattern on a cashmere sweater. The printed cashmere sweater has a Variety of flowers, bright color, vivid pattern, soft feel. Therefore, cashmere sweater printing more and more consumers of all ages, cashmere sweater can be both partial printing and full shirt printing. Sweaters are usually printed with flat screen printing and cylinder screen printing. The former is suitable for the printing of clothing and the latter is suitable for continuous printing. In sweater printing, except for a small part, a cylindrical screen is used. Apart from printing, most sweater products use flat screen printing. In flat screen printing, manual printing is the main method. Sweater screen printing can be divided into steam printing and coating according to the specific process. Printing, low-temperature printing and embossed printing four categories, today's article focuses on relief printing (reliefprinting). People will see a kind of embossed cashmere sweater in the market, with the characteristics of embossed relief pattern, full texture, texture, bright colors, strong contrast under light, giving a visually striking three-dimensional pattern, feel creamy The unique appearance effect is deeply loved by the consumers. Many people do not quite understand why the embossed pattern appears on the sweater. The embossing effect is neither weaving nor “burnt-out printingâ€. More is not "foam printing." How can the embossed pattern appear on the sweater? This also starts with the physical and chemical properties of cashmere. First, the cashmere structure In wool fiber, there are sheep wool, goat wool, wool-free, etc. Cashmere is a fluff obtained from goat's wool. It is light, fine, soft, soft, smooth, and so on. It is called "soft gold" in grams. ". Cashmere is a slender solid cylinder, curled, fiber structure is divided into three layers, namely scales, cortex and medullary layer. Cashmere is the biggest feature of cashmere sweaters, due to the presence of shrinkage also caused the fabric size instability (washed sweaters tend to become smaller). Embossing printing is the use of cashmere fiber surface scales shrinking principle And made into. Second, the mechanism of shrinking Under the action of moist heat and chemical reagents, animal hair fibers are repeatedly squeezed by external mechanical forces, and the fiber aggregates gradually shrink tightly and interpenetrate each other to entanglement and interlace the felt wool. This feature is known as the shrinkage of wool fibers. The fabric can be shrunk, the reason for this is very complicated. The mechanism by which the wool fiber is shrunk is generally due to the following reasons. The front has been observed under the microscope that there are many scales covering the surface of the cashmere fibers. The free ends of the scales point to the direction of the tip of the cashmere fibers. When a felting agent is present, the cashmere fibers are moistened and expand, causing the scales to open. At this time, a certain amount of external force is applied to the cashmere, and the cashmere starts to move, so that the wool fiber has directional friction. That is, the friction coefficient of the scale is small and the coefficient of the inverse friction is large. There exists a relationship between the reverse and the smooth. The coefficient difference (ie, the coefficient of friction of the inverse scale in the case of fiber friction is always greater than the coefficient of friction in the direction of the scale). Coupled with the environment in which the damp heat and chemical additives (condensers) are present, when the sweater is subjected to The repetitive kneading action of the mechanical external force creates a tendency of one-way movement toward the root end of the fiber. In addition, the excellent extensibility, elasticity, and space curl of the wool make the wool fiber easier to move, and thus the mutual inter-fibers Interspersed entanglement, resulting in interwoven felting, hair ends gradually exposed on the surface of the fabric, so that the fabric becomes excellent appearance, rich hand, soft texture, with good thermal effect. Practice has proved: sheep There are more scales than coarse wool, so fine cashmere is better than thick wool. Wool is more than the scales of rabbit hair, so the wool is better than rabbit hair. In addition to the "scale said" and "elasticity In addition, based on certain characteristics and experimental phenomena of wool, people explain the mechanism of cashmere shrinking from different perspectives, such as “de-liberation theoryâ€, “curl theoryâ€, “strain-relaxation theoryâ€, etc. The generally accepted main point is that the linear shrinkage of wool is determined by the directional friction effect and the high degree of tensile recovery. Both are indispensable. The former is called the brake factor and the latter is called the dynamic factor. Chrismas Hats And Caps,Chrismas Hats,Chrismas Caps,Hat Chrismas Yantai Belief Cap Co.,Ltd. , https://www.beliefcaps.com
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June 22, 2023