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Process flow of hot-rolled non-woven fabric

by:XINYU Non-woven     2022-04-15
Hot-rolled non-woven fabrics are non-woven fabrics made of traditional materials. Hot-rolled non-woven fabrics refer to the last web-forming technology in the production process of non-woven fabrics, which is a process for fabricating fabrics after cooling and laying.



The main raw materials of hot-rolled non-woven fabrics:

1. Natural fibers: cotton, wool, hemp, silk;

2. Conventional fibers: viscose fiber, polyester fiber, acetate fiber, polypropylene fiber, polyamide fiber;

3. Differential fibers: superfine fibers, special-shaped fibers, low melting point fibers, high crimp fibers, antistatic fibers;

4. High functional fiber: aramid fiber, carbon fiber, metal fiber.

Process flow of hot-rolled non-woven fabric:

Cotton feeding: Manually put the raw staple fibers on the long curtain in proportion to the long curtain and transport it to the entrance of the cotton mixer.

Cotton blending: 1. The amount of cotton fed into the cotton feeder is controlled by photoelectricity, and the amount of cotton stored in the cotton blender is sent to the entrance of the opener with a quantitative thickness or weight.

Opening: The feeding part is controlled by the photoelectric control of the cotton feeder, and the opened raw staple fibers are sent to the cotton feeder by a fan through the material pipeline.

Cotton feeding: The photoelectric switch is used to control the raw material staple fiber sent from the opener through the photoelectric instrument on the diagonal nail curtain to control the feeding amount of the raw material short fiber sent to the entrance of the carding machine.

Pre-carding: Use frequency conversion to control the input thickness or weight to manually fine-tune the speed of the frequency conversion machine and send it to the laying machine.

Laying: The raw material entering the netting machine is cross-folded horizontally and longitudinally with more than 5 layers and the sheet-like staple fibers are sent to the main carding machine.

Main carding: The flake short fibers sent from the web laying machine are controlled by frequency conversion, and the raw short fibers are carded by the cylinder, work roll and stripping roll, and the raw short fibers are transferred to the random roll by the doffer. The messy roller disrupts the fibers to increase the transverse strength, and the stripping roller peels off the forming web from the messy roller and sends it to the fiber web conveying curtain for three-layer compounding. into the cotton feeder.

Hot rolling The sheet-like raw material staple fibers entering the upper and lower hot rolls of the hot rolling mill from the main card machine are hot-pressed to the temperature and pressure required by the process through the control and adjustment of the temperature and pressure of the hot rolls. *The temperature of the hot roller is sent to the upper and lower hot rollers by the heating oil furnace, and the hot oil of 235 to 240 ℃ is pumped by the hot oil. *The pressure of the hot roller is provided by the air compressor and enters the pressure regulating cylinder through the pressure regulating device with an upper pressure of 1.2 MPa and a lower pressure of 0.8 to 0.9 MPa.

Coiling The products coming out of the hot rolling mill are wound into coils with a maximum diameter of 800mm after trimming and measuring the length.

Finished product inspection and weighing According to the product quality standard sampling and testing its physical indicators, each roll of product can be weighed.
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