Speaking of spunbond non-woven fabric, everyone should be familiar with it because its application range is very wide now, and it is almost used in many fields of people’s lives. And its main materials are polyester and polypropylene, so this material has good strength and high temperature resistance. Spunbonded non-woven fabric is a type of non-woven fabric that is formed by extruding and stretching polymers to form continuous filaments, which are then laid into a mesh and bonded through its own thermal, chemical, or mechanical means. It has a wide range of applications, and people are familiar with non-woven bags, non-woven packaging, and so on. And it is also very easy to identify, usually it has good bi-directional firmness, and its rolling points are diamond shaped.
Application scope
The application level of spunbond non woven fabric can also be used as a packaging part for flowers and fresh packaging cloth, etc. And it is also widely used in agricultural harvesting fabrics. He also has his presence in medical and industrial disposable products, furniture linings, and hotel hygiene products. So. Imitation adhesive non-woven fabric has a wide range of scales and is produced using positive pressure drawing. Due to this method, the solidification network is connected, and the products produced by using a fan for suction are very coarse, resulting in insufficient fiber stretching at one time. This is because of this reason, it is not possible to produce products above 120 grams per square meter.
How to make non woven fabric
And the production process can be flexibly adjusted. The spinning box of the joint production line will use many independent metering pumps to measure the melt. And each metering pump supplies the overall supply to a fixed number of spinning components. Because of this, a metering pump can be stopped according to the customer’s order demand in production, and then the baffle of the textile machine can be adjusted to produce semi-finished products of different widths. In addition, when certain directional indicators of semi-finished products do not meet the standards, corresponding textile components can be replaced for adjustment.
What is the basic process flow of spunbond nonwoven fabric?
1. Slicing and baking
The polymer chips obtained through granulation and casting of transmission belts usually contain a certain amount of moisture, which needs to be dried and removed before spinning.
2. Spinning
The spinning equipment and technology used in the spunbond method are basically the same as those used in chemical fiber spinning. The main equipment and accessories are screw extruders and spinnerets.
3. Stretch
The newly formed melt spun fibers (primary fibers) have low strength, high elongation, unstable structure, and do not possess the performance required for textile processing, requiring stretching.
4. Filamentation
The so-called splitting refers to the separation of stretched fiber bundles into single fibers to prevent fibers from sticking or knotting during the web forming process.
5. Laying a net
(1) Air flow control
(2) Mechanical prevention and control
(3) After stretching and splitting, the filament needs to be evenly laid on the mesh curtain.
6. Suction net
By using suction nets, the downward airflow can be carried away and the rebound of the tow can be controlled. Therefore, there is a 20 centimeter thick vertical air guide orifice plate under the mesh curtain to prevent reverse airflow from blowing onto the mesh. A pair of windproof rollers are arranged at the suction boundary in the forward direction of the fiber mesh. The upper roller has a larger diameter, is relatively smooth, and is equipped with a cleaning knife to prevent the roller from getting entangled. The lower roller has a smaller diameter and is usually clamped with rubber rollers to form a mesh curtain. The auxiliary suction duct directly sucks in the airflow pressure net, thereby controlling the fiber net to attach to the mesh curtain.
7. Reinforcement
Reinforcement is the final process, which enables the mesh to have certain strength, elongation, and other properties to meet product requirements.
If the breathability is poor, the spinning group with fewer holes on the spinneret can be replaced, which can increase the breathability of the fabric surface. Now, the air pressure of the one-way guide cylinder can also be adjusted to make the physical properties of the entire width more uniform. The lateral strength of spunbond non-woven fabric is relatively high, and the spinning method uses the textile method to form a web. The sheet will continuously swing back and forth at a frequency of 750Hz, and the high-speed stretching fibers will collide laterally with the mesh.
The strength of spunbond fabric is very high because the mesh curtain moves forward diagonally and interlaces. The vertical and horizontal intensity of notes can reach 1:1. Generally speaking, the simulation uses a Venturi riser, but its strength is not too high, and the longitudinal and transverse strength is too strong. The fibers of non-woven fabrics on websites have good high-temperature resistance and wear resistance, and their mechanical strength is greater than that of PP fibers.
What should be paid attention to during the rolling process of spunbond non-woven fabric?
1. During the winding process, master the tension control of spunbond non-woven fabric.
2. When the tension increases within a certain range, the diameter and width of the spunbond nonwoven roll shrink.
3. When the tension increases within a certain range, it can be increased. The actual needs for the above tension should be summarized in actual production to ensure quality.
4. During the production process, pay attention to regularly checking the width and roll length of spunbond non-woven fabric.
5. The paper tube and spunbond non-woven fabric roll should be aligned.
6. Pay attention to the inspection of the appearance quality of spunbond non-woven fabric, such as dripping, breakage, tearing, etc.
7. Pack according to production requirements, pay attention to cleanliness, and ensure the packaging is firm.
8. Sampling and testing of each batch of spunbond non-woven fabric.
Post time: Jan-30-2024