Regeneration technique for jean cotton cloth

[0007] The embodiments of the present invention will be described in detail below.

[0008] The present invention is a denim fabric regeneration process, which is used to recover denim scraps. The denim fabric regeneration process includes the following steps:

[0009] A. Remove the label paper and other impurities in the denim scraps, remove the non-denim materials, that is, the non-cotton materials in the scraps, to ensure that the recycled denim is the same material as the raw material, and recover a single material; cut the denim scraps into Rags, the specification is within 10cm×15cm, in order to meet the requirements of the equipment in subsequent operations such as opening, while ensuring the fiber length of the recycled yarn, and obtaining recycled materials with a fiber length of about 10-28mm to meet the high quality of textiles The requirements of the cloth, so that the obtained cloth can be used for the same purpose as the original material.

[0010] B. Desizing the rag material, put the rag material in warm water with a temperature of 60 ℃, so that all the rag material can be completely immersed in the water; add alkali oil weighing seven thousandths of the water and the weight is Soak the 1% desizing powder in water for 10 minutes, and then drain the water soaking the rag material. It is best to maintain the temperature of the water during the soaking process. Alkaline oil is composed of fatty alcohol polyoxyethylene ether polymers, namely Fatty alcohol ethoxylates; desizing powder is protein, namely Protein. The addition of alkali oil and desizing powder can soften and decompose the pulp material attached to the leftover fabric. At the same time, it can protect the cotton material to prevent the pulp material from accumulating in the spinning cup during spinning, and make the pulp material under the action of hot water. It is easier to decompose. The weight ratio of desizing powder to water is 1:100. Alkali oil and desizing powder do not chemically react with each other under normal conditions. After being dissolved in hot water, they can play their own roles and maintain the original chemical properties, so that desizing can proceed smoothly. This desizing process mainly relies on the action of hot water, which softens and decomposes the pulp material with the assistance of desizing powder and alkali oil.

[0011] C. Repeat step B once to further desizing to make desizing more thorough.

[0012] D. In addition to water, use a water press to squeeze out the moisture in the rag material and discharge 90% of the water attached to the rag material, which is convenient for subsequent drying to save energy and time. This step can also use a water thrower to remove water.

[0013] E. Drying: Put the rag material after dewatering into an environment of 100℃ for drying to ensure that the material is not ignited during the drying process, and the material can be dried quickly.

[0014] F. Open the denim rag material, and restore the rag material to cotton material for subsequent re-weaving. After the cotton material is extracted, it is cleaned, carded, drawn, spun, and weaved to obtain recycled denim. In this step, the cotton material is recovered through the opening and cleaning processes, and then the textile regeneration of the denim is realized according to the ordinary textile process. The denim obtained is not damaged by chemical corrosion during the recycling process, so as to ensure that the recycled fabric has the same physical properties as the denim scraps before recycling, and can be used as a raw material. After the cotton material is extracted, 10% to 90% of raw cotton can be added and mixed to obtain a mixed cotton material before cleaning. This process can be called cotton blending. Cotton blending can further ensure the quality of recycled denim materials and compensate for the performance loss of recycled cotton materials.

[0015] Desizing by hot water reduces the use of chemical additives, saves water consumption, is conducive to environmental protection and maintains the physical properties of recycled cotton fabrics such as toughness and strength, so that recycled textile fabrics can be used for the same production of products, which improves Utilization rate of cloth. The process can also eliminate the fading step to further ensure the physical properties of the recycled fabric, while maintaining the original color of the recycled fabric and reducing the use of coloring pigments. Recycled cotton yarn from primary colors is used as warp yarn as the bottom layer for denim weaving, and its color does not affect the overall color of the fabric; the recycled yarn can be used as weft yarn for supplementary dyeing, and it does not need to consume a lot of dyes for dyeing. It will not produce pigment waste during the regeneration process and reduce the amount of pigment used in the later supplementary dyeing, which is beneficial to environmental protection. The recovery process saves more than 85% of chemical raw materials, saves more than 50% of water, and saves the steps of the recovery process to save time.

[0016] Therefore, the leftover material left over from the denim use process can be 100% recycled, and the recycled and re-spun material has the same physical properties as the original fabric, so it can be used as the original material, so that the original fabric can be 100% used during the processing process. Waste any leftover materials, improve the utilization efficiency of original materials, and save material costs.

[0017] The scrap recycling process collects and regenerates different raw material sources separately. The denim recycled from scraps is used in the production of the same denim product to ensure the uniformity of raw materials for the same denim product and avoid mixing raw materials with different properties. In this way, the scraps produced during the production process of the raw materials of each denim product can be recycled separately, and the recycled materials can be used in the production of the same variety of denim products to ensure the consistency of denim product materials. Denim raw materials other than cotton can be recycled together to obtain a fabric with the same properties as the original denim.

[0018] Recycling scraps of raw materials for different products can avoid confusion and messiness of the recycled materials. It can be recycled without completely fading. Recycled scraps mixed with other raw materials need to be completely faded before they can be used. Complete fading requires a large amount of chemical agents, which not only damages the physical properties of the raw materials themselves, but is also not environmentally friendly, affecting the ecological environment and production environment, and affecting the health of production workers.

[0019] More preferably, after the desizing step, before removing water, add the following descaling step between step C and step D: use a waterless washing machine to separate oxygen and nitrogen, extract oxygen from the air, and then separate and transform the oxygen by plasma technology It becomes a mixture of active oxygen and ozone. The mixture of active oxygen and ozone is filled with a container of rag material. After a certain period of time, the indigo of the rag material falls off and the color fades. This fading process is the separation of indigo (pigment) from the cloth. The process can be called anhydrous washing. The duration of the fading process of anhydrous washing is 10-30 minutes, depending on the desired degree of fading. After the waterless washing is completed, the denim rags are placed in the air to oxidize, and the pigments can be returned. Do not use chemical additives to fading denim cotton cloth, which not only achieves the fading effect, but also avoids the environmental pollution caused by chemical additives, and can also avoid the damage of chemical additives to cotton, so that the recycled fabric has the physical properties of the original fabric At the same time, it can further save 67% of water consumption and save more than 55% of time, so that it can be used in the production of products of the same grade as the original fabric, which improves the use value of recycled fabrics, improves the utilization rate of original fabrics, and reduces the waste of garment scraps .

[0020] The above-disclosed are only the preferred embodiments of the present invention, which of course cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope of the present invention.