NEWS
One hundred companies PK
Latest products
Advantages and disadvantages of SMS non-woven meltblown online composite process
by：Sunshine
2021-04-11
Definition of meltblown online compounding
Meltblown on-line lamination is to configure two unwinders on the meltblown production line to unwind the S cloth, and the two layers of S cloth clamp the M cloth, and then enter the rolling mill for hot rolling and bonding to produce SMS nonwovens. a way. That is, the S cloth produced by the unwinding of the first unwinding machine is evenly spread on the netting curtain, and the M produced by the melt blowing equipment is sprayed on the S cloth, and then the S cloth produced by the unwinding of the second unwinding machine is covered. The layer S cloth sandwiches M and enters the hot rolling mill for bonding to form an SMS.
The production process of this type of production line combines the characteristics of online compounding and offline compounding. It has both the advantages of online compounding and offline compounding. It is an SMS production process suitable for China's national conditions.
Advantages of melt blown online composite process
The advantages of the melt blown online composite process are as follows.
(1) Small investment. An imported 3.2m melt blown production line is equipped with two unwinding machines, and the investment is about 80 million yuan, which is about 1/3 of the on-line composite production SMS production line.
(2) There are many varieties of products. This production line produces separate barrier meltblown materials, meltblown filter materials, hot-rolled industrial wipes, SM filter materials, SMS non-woven fabrics, and SMS composite fabrics with special functions. Between the melt nozzle and the second unwinding machine of the spunbonded nonwoven fabric, a short fiber adding device is designed, which can add wood pulp or viscose short fiber to prepare a special SMS composite with high water absorption and high filtering effect. Materials, even carbon fibers or activated carbon particles, polymer super absorbents, etc. can be added to prepare composite fabrics with special functions.
(3) High output.
(4) It can produce products with a grammage below 30g/m2, the smallest product grammage produced can reach 20g/m2, and it can produce on-line composite thick SMS, the maximum grammage can reach 150g/m2, and The output is very high.
(5) The weight of the meltblown cloth can be adjusted flexibly according to the customer's physical performance requirements, so that the product has good air permeability, filtration performance and hydrostatic pressure resistance. On this production line, S cloth can be fine-tuned to better improve product performance.
(6) Because this production line adjusts the melt blown online, there is no need to worry about the impact of the melt blown cloth due to the strength of the melt blown cloth like offline compounding. When the meltblown layer has two layers of S, it can achieve 2～3g/m2, which is conducive to the market competition of enterprises.
(7) This production line not only has the function of adjusting the distance between the mesh curtain and the die head (DCD), but also has the function of adjusting the angle between the mesh curtain and the die head, which is convenient to improve the barrier and uniformity of the melt blown cloth Sex. Especially when making SMS non-woven fabrics of 40～60g/m2 and above for protective clothing, on the one hand, it can avoid the shortcomings of online compounding that reduce the output of S due to the increase of melt blowing, and on the other hand, it can overcome the two-step hot rolling Stress and
High temperature causes the disadvantages of poor hand feel, air permeability, and strength. It is especially suitable for making SMS non-woven fabrics for 40～60g/m2 protective materials.
(8) When composite SMS is made on the melt-blown line, since the melt-blown is directly sprayed on the first layer of S, the combination of S and M is better, and the produced SMS is not easy to delaminate. It is more flexible in the selection of temperature and pressure of the hot rolling mill, so the produced SMS has good hand feeling, good air permeability and high strength, and because M is sprayed directly on the S cloth, the unevenness of the S cloth can be compensated for and improved. Uniformity of SMS.
(9) Since this production line is melt blown uninterrupted, the S roll can be made large, and the S roll connection technology is adopted without stopping and no speed reduction, so the production line can run continuously at high speed and produce SMS The length of the non-woven fabric roll is uniform, and there are almost no joints in the produced SMS fabric roll, which is beneficial to the use of downstream customers.
(10) In production, since only melt blown cloth is produced online, the loss in production can be minimized, especially when producing colored SMS, on the one hand, it avoids excessive production of transition cloth, on the other hand It is convenient to produce SMS non-woven fabric with accurate color.
(11) This production line has a short installation cycle and quick results.
(12) The produced SMS feels very good, close to online composite products.
Shortcomings of meltblown online composite process
The shortcomings of the meltblown online composite process are: due to the influence of S cloth, SMS non-woven fabrics with product specifications below 20g/m2 cannot be produced, so they cannot be produced for sanitary napkins, sanitary pads, and baby urine. Very thin SMS non-woven fabrics such as pants.
Since this kind of production process only appeared in December 2004, experts in the industry classified it as offline compounding, which I think is inappropriate. This kind of production process route has both the characteristics of online compounding and offline compounding. It is made by absorbing the essence of these two process routes. It is very different from offline compounding. Therefore, it is recommended that domestic experts use this process The route is used as another process route for SMS production to facilitate the development of this process route.
Meltblown on-line lamination is to configure two unwinders on the meltblown production line to unwind the S cloth, and the two layers of S cloth clamp the M cloth, and then enter the rolling mill for hot rolling and bonding to produce SMS nonwovens. a way. That is, the S cloth produced by the unwinding of the first unwinding machine is evenly spread on the netting curtain, and the M produced by the melt blowing equipment is sprayed on the S cloth, and then the S cloth produced by the unwinding of the second unwinding machine is covered. The layer S cloth sandwiches M and enters the hot rolling mill for bonding to form an SMS.
The production process of this type of production line combines the characteristics of online compounding and offline compounding. It has both the advantages of online compounding and offline compounding. It is an SMS production process suitable for China's national conditions.
Advantages of melt blown online composite process
The advantages of the melt blown online composite process are as follows.
(1) Small investment. An imported 3.2m melt blown production line is equipped with two unwinding machines, and the investment is about 80 million yuan, which is about 1/3 of the on-line composite production SMS production line.
(2) There are many varieties of products. This production line produces separate barrier meltblown materials, meltblown filter materials, hot-rolled industrial wipes, SM filter materials, SMS non-woven fabrics, and SMS composite fabrics with special functions. Between the melt nozzle and the second unwinding machine of the spunbonded nonwoven fabric, a short fiber adding device is designed, which can add wood pulp or viscose short fiber to prepare a special SMS composite with high water absorption and high filtering effect. Materials, even carbon fibers or activated carbon particles, polymer super absorbents, etc. can be added to prepare composite fabrics with special functions.
(3) High output.
(4) It can produce products with a grammage below 30g/m2, the smallest product grammage produced can reach 20g/m2, and it can produce on-line composite thick SMS, the maximum grammage can reach 150g/m2, and The output is very high.
(5) The weight of the meltblown cloth can be adjusted flexibly according to the customer's physical performance requirements, so that the product has good air permeability, filtration performance and hydrostatic pressure resistance. On this production line, S cloth can be fine-tuned to better improve product performance.
(6) Because this production line adjusts the melt blown online, there is no need to worry about the impact of the melt blown cloth due to the strength of the melt blown cloth like offline compounding. When the meltblown layer has two layers of S, it can achieve 2～3g/m2, which is conducive to the market competition of enterprises.
(7) This production line not only has the function of adjusting the distance between the mesh curtain and the die head (DCD), but also has the function of adjusting the angle between the mesh curtain and the die head, which is convenient to improve the barrier and uniformity of the melt blown cloth Sex. Especially when making SMS non-woven fabrics of 40～60g/m2 and above for protective clothing, on the one hand, it can avoid the shortcomings of online compounding that reduce the output of S due to the increase of melt blowing, and on the other hand, it can overcome the two-step hot rolling Stress and
High temperature causes the disadvantages of poor hand feel, air permeability, and strength. It is especially suitable for making SMS non-woven fabrics for 40～60g/m2 protective materials.
(8) When composite SMS is made on the melt-blown line, since the melt-blown is directly sprayed on the first layer of S, the combination of S and M is better, and the produced SMS is not easy to delaminate. It is more flexible in the selection of temperature and pressure of the hot rolling mill, so the produced SMS has good hand feeling, good air permeability and high strength, and because M is sprayed directly on the S cloth, the unevenness of the S cloth can be compensated for and improved. Uniformity of SMS.
(9) Since this production line is melt blown uninterrupted, the S roll can be made large, and the S roll connection technology is adopted without stopping and no speed reduction, so the production line can run continuously at high speed and produce SMS The length of the non-woven fabric roll is uniform, and there are almost no joints in the produced SMS fabric roll, which is beneficial to the use of downstream customers.
(10) In production, since only melt blown cloth is produced online, the loss in production can be minimized, especially when producing colored SMS, on the one hand, it avoids excessive production of transition cloth, on the other hand It is convenient to produce SMS non-woven fabric with accurate color.
(11) This production line has a short installation cycle and quick results.
(12) The produced SMS feels very good, close to online composite products.
Shortcomings of meltblown online composite process
The shortcomings of the meltblown online composite process are: due to the influence of S cloth, SMS non-woven fabrics with product specifications below 20g/m2 cannot be produced, so they cannot be produced for sanitary napkins, sanitary pads, and baby urine. Very thin SMS non-woven fabrics such as pants.
Since this kind of production process only appeared in December 2004, experts in the industry classified it as offline compounding, which I think is inappropriate. This kind of production process route has both the characteristics of online compounding and offline compounding. It is made by absorbing the essence of these two process routes. It is very different from offline compounding. Therefore, it is recommended that domestic experts use this process The route is used as another process route for SMS production to facilitate the development of this process route.
Custom message
