Views:287 Author:Site Editor Publish Time: 2019-07-23 Origin:Site
In the production process of nylon filament, the ambient temperature and humidity of the workshop have a great influence on the product quality. In actual production, the temperature and humidity control of the workshop environment is unreasonable, which will seriously affect the quality of the product. When the temperature and humidity are low, the yarns in the downstream manufacturers are prone to hairiness and breakage during the weaving process, and the tension is fluctuated during the weaving process, and the fabric surface is prone to streak, which affects the production efficiency.
When the temperature and humidity are high, the appearance of nylon DTY is prone to stiffening. At the same time, the influence of temperature and humidity on the weight of the product is also relatively large. Since the production of fixed-length and fixed-weight products is currently poor, the weight control is not good, which will cause the consumption of caprolactam to increase greatly, thereby increasing the production cost of the enterprise and reducing the profit of the enterprise. Therefore, strict control of the temperature and humidity of the workshop environment is of great significance to improve the quality of products and reduce production costs and enhance the competitiveness of enterprises.
The side air temperature and humidity have a great influence on the quality of POY, and the side blowing temperature is not suitable, which causes the POY to have a high unevenness rate. When the post processing is performed, the false tension fluctuations easily cause the DTY appearance to be stiff and the dyeing socks are periodically generated. Color difference, forming a striped wire, also known as segmental silk, even in the case of serious can not be added, so the front spinning workshop side air temperature and humidity process setting range, temperature control at (26 ± 1) ° C, humidity control at (75 ± 5)%].
The influence of workshop humidity on the physical properties of the finished silk is mainly concentrated on the fineness and curling performance. When the humidity is high, the DTY fineness is obviously increased and the yarn is firmer; when the humidity is low, the DTY fineness is obviously decreased, the yarn is loosened, and the yarn is unwound.
The influence of the humidity of the workshop on the curling performance is also obvious. When the humidity is high, the DTY curling performance is obviously improved; when the humidity is low, the DTY crimping performance is decreased. In order to maintain the stability of DTY quality, the humidity in the workshop is generally controlled to be 65%~70%, avoiding large fluctuations.
The influence of temperature and humidity in the packaging workshop on the weight of the finished yarn. The nylon DTY has strong hygroscopicity. Especially before the packaging is put into the warehouse, the temperature and humidity of the workshop have a great influence on the weight of the nylon DTY. In recent years, a lot of debugging work has been done on the influence of temperature and humidity on the weight of nylon DTY. When the external temperature suddenly drops suddenly, the humidity of the nylon packaging workshop is reduced from 80% to 63%.
After the finished silk is balanced in the packaging workshop for one day, the weight of each finished product is 20~30g. It seems that when the external temperature and humidity are low, even if the temperature and humidity are maintained in the post-spinning workshop, the weight of the finished product is normal. However, due to the low temperature and humidity of the packaging workshop, the finished product is placed in the packaging workshop for one day, in the wire ingot. The water and oil will volatilize a part, resulting in a light weight of the finished product.
When the outside temperature and humidity are low, the nylon packaging workshop uses steam to humidify to ensure the humidity of the packaging workshop. It not only ensures that the weight of the DTY is not volatile when placed in the packaging workshop, but also reduces the production cost and ensures the quality stability of the product. After the package is installed with steam humidification, when the external temperature and humidity are low, a finished product with a weight of 3990g is weighed and weighed, and the weight of each ingot is weighed and recorded. The package is steam humidified and the humidity is above 70%. The finished product is placed in the packaging workshop for one day. After one day of balance, the weight of each key product is increased by 15~20g compared with the original weight.
Therefore, the external temperature and humidity have a great influence on the quality and production cost of nylon yarn. The stable temperature and humidity during production and warehousing are one of the important factors to ensure the uniformity of DTY quality.
Thus, temperature and humidity are one of the important factors affecting the quality of nylon yarn. In the production of nylon, it is necessary to strictly control the temperature and humidity of the workshop to ensure the stability of product quality. Process setting range of front air blower temperature and humidity of front spinning workshop, temperature control (26±1) °C, humidity control (75±5)%; process setting range of environment temperature and humidity of post-spinning workshop, temperature control (30±3) °C, humidity control (65±5)%; the process setting of the laboratory environment humidity is checked, and the humidity is controlled at (78±5)%.