A kind of spandex spinning finish with uniform unwinding inside and outside and its preparation method

Abstract

The invention relates to spandex spinning oil with a function of enabling exterior-interior unwinding to be uniform, and a preparation method of the spandex spinning oil. The spandex spinning oil is prepared by mixing a component A and a component B, wherein the component A is prepared from the following components by weight: 80-92% of dimethyl silicone oil, 1-10% of modified silicone oil, 0.5-5%of silane containing special functional groups and 1-8% of silicon resin; the component B is prepared from the following components by weight: 80-90% of mineral oil, 5-15% of a W / O type emulsifying agent, 1-5% of an antistatic agent and 0.5-2% of modified magnesium stearate; the mixing ratio of the component A to the component B is equal to (1.5 to 1)-(1 to 1.2). The oil which is prepared by the method and is used for polyurethane elastic fibers is yellowish transparent liquid, and not only can enable spandex fibers to have excellent formability in a winding process, but also has higher surface energy and has stronger adsorption to polyurethane so as to enable the polyurethane not to easily migrate to the surfaces of the fibers from the inner layers of the fibers, thus endowing the spandexfibers with more uniform exterior-interior unwinding and further enabling the spandex fibers to be smoothly unwound and not to be broken in the subsequent application.

Description

Technical field [0001] The invention relates to a spinning oil for polyurethane elastic fibers, and also relates to a preparation method of the polyurethane elastic fiber oil, which belongs to the field of fiber oil preparation. Background technique [0002] Polyurethane elastic fiber, also known as spandex, is widely used in the textile and clothing field because of its high elongation, good resilience, and excellent dyeability. In 2016, my country's spandex output exceeded 500,000 tons, and it is still growing. [0003] Due to the presence of urethane polar groups in the molecular structure of polyurethane elastic fibers, while imparting elasticity to the spandex fibers, it also makes the spandex filaments prone to adhesion. Therefore, in the spandex spinning and forming process, the spandex yarn needs to be oiled, so that the spandex yarn has good smoothness and bundling during the forming process, and it is easy to unwind in the later use process, does not collapse, and the bo...

AI Technical Summary

Problems solved by technology

Although there are many companies producing spandex oils, and there are many types of oils, there are still some problems, such as poor antistatic properties of oils, poor unwinding of spandex yarns in the subsequent use process, and easy edge collapse and broken yarns. , the unwinding speed is too slow, etc.

The spandex oil agent as described in the patent US3717575 is composed of mineral oil, silicone oil and amino-modified silicone oil. The characteristics of this type of oil agent are that the spun spandex silk is smooth and feels good, but the antistatic performance is poor.

Patent CN1696395A uses divalent stearic acid metal salt as an anti-blocking additive and adds it to the oil to improve the unwinding performance of spandex yarn. Patent CN200810207234 adds silicone resin as an anti-blocking additive to improve the unwinding property of the silk cake. Although stearate and silicone resin can indeed play the role of anti-adhesive and slippery, the anti-adhesive durability is insufficient. Due to the low surface energy of the silicone oil and mineral oil in the oil component, the oil film strength is insufficient, and the adsorption property is insufficient. Weak, once the spandex yarn is placed for more than three months, the oil agent will easily migrate from the bottom of the yarn cake to the surface, resulting in a large difference in unwinding performance between the surface and the inside of the spandex, and the surface layer is prone to collapse and the inner layer is prone to broken filaments during subsequent applications

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