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Differences in production processes
The production of traditional nylon yarn is mainly completed through polymerization, melt spinning, stretching and finishing. Its process is relatively mature and standardized, the equipment and technology are relatively popular, and the production efficiency is high.
The production process of nylon multifilament yarn is relatively complicated. Multifilament generally refers to a composite fiber composed of two or more fibers through co-extrusion, multi-cavity spinning or blending. Nylon multifilament usually involves the following additional steps:
*Multi-cavity spinning technology requires a special spinneret design to achieve simultaneous molding of multi-component fibers.
*Fiber structure control and ratio adjustment, which requires more precise process parameter management.
*The stretching, heat treatment and other steps of composite fibers are more detailed than traditional nylon yarns to ensure that the fibers are firmly bonded and the performance is balanced.
The process of producing nylon multifilament yarn not only has more composite manufacturing links, but also requires strict control of the fiber structure, which is more complicated than the process of traditional nylon yarn.
Raw materials and cost input
The raw materials of traditional nylon yarn are mostly single polyamide materials, and the raw material procurement and ratio are relatively simple, and the cost is relatively stable. The nylon raw material market is mature and the supply chain is perfect, which is conducive to controlling production costs.
Due to its composite structure, nylon multifilament usually involves a combination of multiple materials, such as nylon and polyester, spandex and other different fibers, or nylon with different modified substances. This makes the procurement of raw materials more complicated, and the cost of some high-performance composite materials is higher than that of a single material.
The ratio and quality stability of composite materials are required to be high. Any fluctuation in raw materials will affect the performance of the finished fiber, resulting in material waste and increased debugging time in production, which also indirectly increases costs. Nylon multifilament is usually more expensive than traditional nylon yarn at the raw material level.
Process equipment and technical requirements
Traditional nylon yarn production equipment has mature technology, relatively simple operation, technical personnel have a high degree of mastery of the process, rich maintenance and troubleshooting experience, and relatively stable production efficiency. In contrast, nylon multifilament production requires dedicated multi-component spinning equipment, such as multi-cavity spinnerets and special drafting systems. These equipment are expensive and have strict requirements for operating parameter control.
During the production of multifilament yarn, multiple parameters such as temperature, pressure, and fiber stretch ratio need to be precisely controlled. Once a parameter in a certain link is abnormal, it may lead to a decrease in fiber performance or even an increase in scrap rate. The training requirements for multifilament process technicians are higher, and they need to have more knowledge and process experience in composite fibers. The overall technical threshold is significantly higher than that of traditional nylon yarn production.
Difficulty of quality control
Nylon multifilament yarn involves the combination of multiple materials, so the product performance is more complex and the difficulty of quality control is relatively increased. It is necessary to monitor the physical properties, chemical properties, structural uniformity and other aspects of the fiber. Traditional nylon yarn has clear properties of a single material, which makes detection and control relatively simple and has high production stability. Quality fluctuations in multifilament yarn production may lead to unstable performance of downstream products, increase the cost of inspection and rework, and thus affect overall production efficiency and economic benefits.
Market demand and cost impact
Nylon multifilament yarn is often used in high-end sportswear, industrial filtration materials, functional fabrics and other fields because of its richer functionality, and the market has high requirements for performance.
This market positioning allows the high production cost of nylon multifilament yarn to be compensated to a certain extent by the price of high value-added products. In contrast, traditional nylon yarn is more suitable for the mass market, and cost control is its core competitiveness. Although the production cost and process difficulty of nylon multifilament are high, its market value and application range are also relatively wide, forming a certain economic balance.
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