Production system and production process of jacquard hot air nonwoven fabric

Abstract

The present application relates to a kind of jacquard hot air nonwoven fabric production system and production process, the production system includes the opening machine of material advancing direction in turn arrangement, coarse fiberizing machine, jacquard carding machine, hot air oven mechanism and winding machine;The jacquard carding machine includes carding machine body, the carding machine body includes 1 or more from top to bottom setting doffer, the doffer includes doffer cylinder, the card clothing wrapped on the doffer cylinder, and several carding needles uniformly arranged on card clothing;Wherein the card clothing of at least one doffer is provided with several non-comb needle area without setting carding needle, several non-comb needle area integrally forms jacquard pattern, several doffer with jacquard pattern is sequentially arranged from top to bottom with the uppermost doffer as starting point.The jacquard is carried out in the carding process using the present application, and the production efficiency is high, and it does not need secondary heating, greatly reduces the production energy consumption and cost, and can be completed by traditional production system modification, and the modification cost is low.

Description

Technical Field

[0001] This invention relates to the field of hot-air nonwoven jacquard technology, specifically to a production system and process for jacquard hot-air nonwoven fabric. Background Technology

[0002] Currently, there are two common processes for jacquard fabric production in hot-air nonwoven fabric manufacturing: 1) An offline two-step method, which involves first opening, carding, and hot air setting at 100-140℃ to produce plain-weave hot-air nonwoven fabric. After winding, it is transferred to an embossing production line where jacquard is applied using an embossing method. The drawbacks of this method are that it requires two production lines, involves multiple process paths, and involves secondary heating of the nonwoven fabric; 2) An embossing device is installed after the hot air drying oven at the last stage of the hot-air nonwoven fabric production line. The nonwoven fabric passes through the drying oven at a temperature of 100- At 150℃, the relatively low melting point of the surface layer of the bicomponent fiber is melted, thereby forming a connection between the fibers. After hot air setting, the embossing and jacquard operation is carried out while it is still hot. Although only one production line is needed to realize the jacquard of non-woven fabric, it is also necessary to rapidly cool and set the jacquard part of the non-woven fabric during the embossing process. This results in inconsistent hardness between the jacquard and non-jacquard parts of the non-woven fabric. In addition, this production method can only build a new production line, and it is difficult to modify the existing production line due to limitations such as the production location, the temperature and length of the hot air drying oven. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the prior art and provide a production system and process for jacquard hot air nonwoven fabric. It only requires one production line to complete the production of hot air nonwoven fabric and jacquard work, without the need for secondary heating. The equipment has a small footprint and high production efficiency. In addition, it is easy to modify and upgrade the original hot air nonwoven fabric production equipment with very low modification difficulty.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A production system for jacquard hot air nonwoven fabric includes a pack opener, a coarse fiber opener, a jacquard carding machine, a hot air drying oven mechanism, and a winding machine arranged sequentially according to the material travel direction.

[0006] The jacquard carding machine includes a carding machine body, which includes a frame, and one or more doffer rollers arranged from top to bottom on the frame. Each doffer roller includes a doffer roller cylinder, a card cloth wrapped around the doffer roller cylinder, and a plurality of carding needles evenly arranged on the card cloth. At least one doffer roller has a plurality of cardless areas without carding needles on its card cloth. The cardless areas are linear cardless areas, and the plurality of cardless areas together form a jacquard pattern. The plurality of doffer rollers with jacquard patterns are arranged sequentially from top to bottom, starting from the uppermost doffer roller.

[0007] As a further technical solution, the length of the comb needle is 1-2mm; the line width of the linear comb-free area is greater than or equal to 5mm.

[0008] As a further technical solution, the spacing between adjacent areas without comb needles is greater than or equal to 8mm (preferably greater than or equal to 10mm).

[0009] As a further technical solution, the frame of the carding machine body is arranged in sequence according to the material travel direction, including a feeding mechanism, a pre-carding cylinder mechanism, a transfer roller, a main cylinder mechanism, two doffer rollers, two cotton stripping mechanisms, and two output curtains respectively arranged below the corresponding cotton stripping mechanisms. The two doffer rollers, two cotton stripping mechanisms, and two output curtains are divided into upper and lower groups. The doffer rollers, cotton stripping mechanisms, and output curtains in either the upper or lower group are arranged in the material travel sequence.

[0010] As a further technical solution, the feeding mechanism includes a feeding curtain, a feeding guide roller and a condensing roller arranged sequentially in the material travel direction;

[0011] As a further technical solution, the pre-combing cylinder mechanism includes a chest cylinder and a stripping roller and a working roller disposed above the chest cylinder;

[0012] As a further technical solution, the main cylinder mechanism includes a main cylinder, and a second stripping roller and a second working roller disposed above the main cylinder;

[0013] As a further technical solution, the cotton stripping mechanism includes a cotton stripping roller and a stripping roller arranged in sequence.

[0014] As a further technical solution, two cotton-coagulating mechanisms are also included, which are respectively arranged between the corresponding doffer rollers and the cotton-removing mechanisms;

[0015] As a further technical solution, the cotton condensing mechanism includes a second condensing roller and a randomizing roller arranged in sequence.

[0016] As a further technical solution, a cotton pressing roller is also provided between the jacquard carding machine and the hot air drying oven mechanism.

[0017] As a further technical solution, the inlet end of the jacquard carding machine is provided with a pneumatic cotton box, and a cotton storage box is provided between the coarse fiber opener and the pneumatic cotton box. The coarse fiber opener and the cotton storage box, as well as the cotton storage box and the pneumatic cotton box, are all connected through conveying pipes.

[0018] As a further technical solution, a stain detection device and an online full inspection device are also provided between the hot air drying oven mechanism and the winding machine.

[0019] As a further technical solution, the hot air drying oven mechanism includes 3-8 hot air drying ovens arranged in sequence;

[0020] A production process for jacquard hot-air nonwoven fabric, characterized by using the above-mentioned production system to produce jacquard hot-air nonwoven fabric, specifically including the following steps:

[0021] Step 1: After the fiber raw material is opened and mixed by a coarse opener, it enters the jacquard carding machine. During the process of carding the jacquard carding machine into a web, each doffer roller runs at the same speed. The doffer rollers without jacquard patterns at the bottom form a flat fiber web layer, while the doffer rollers with jacquard patterns at the top form a hollow jacquard pattern in the corresponding area because there are no card needles in the jacquard pattern area. Then all the fiber web layers are stacked to form a fiber web with a concave jacquard pattern on the upper surface.

[0022] Step 2: The fiber web with a concave jacquard pattern on the upper surface enters the hot air drying oven mechanism through the cotton pressing roller. The time for the fiber web to pass through the hot air drying oven mechanism is controlled to be 3-30 seconds. The fiber web is hot air solidified under the action of 110-138 degrees Celsius and 20-80% hot air volume to obtain jacquard hot air nonwoven fabric.

[0023] As a further technical solution, the fiber raw material is a mixture of 2D PE fiber raw material and 1.2PET fiber raw material in a ratio of 30:70.

[0024] As a further technical solution, the hot air consolidation conditions are as follows: the hot air oven has 4 sections, and the time for the fiber web to pass through the hot air oven mechanism is 8-16 seconds.

[0025] The hot air temperature of the first oven section is 110-130℃, and the hot air volume is 20-35%; the hot air temperature of the second oven section is 120-135℃, and the hot air volume is 20-40%; the hot air temperature of the third oven section is 130-140℃, and the hot air volume is 20-40%; the hot air temperature of the fourth oven section is 125-135℃, and the hot air volume is 20-40%.

[0026] Alternatively, when the hot air drying oven has 6 sections, the time for the fiber web to pass through the hot air drying oven mechanism is 14-22 seconds.

[0027] The hot air temperature of the first oven section is 110-125℃, and the hot air volume is 18-32%; the hot air temperature of the second oven section is 117-128℃, and the hot air volume is 24-28%; the hot air temperature of the third oven section is 125-138℃, and the hot air volume is 22-35%; the hot air temperature of the fourth oven section is 125-138℃, and the hot air volume is 22-35%; the hot air temperature of the fifth oven section is 120-130℃, and the hot air volume is 22-35%; the hot air temperature of the sixth oven section is 110-120℃, and the hot air volume is 18-28%.

[0028] The hot air consolidation conditions are as follows: the hot air oven has 4 sections, and the time for the fiber web to pass through the hot air oven mechanism is 10-14 seconds.

[0029] As a further technical solution, the hot air consolidation conditions are as follows: the hot air oven has 4 sections, and the time for the fiber web to pass through the hot air oven mechanism is 10-14 seconds.

[0030] The hot air temperature of the first oven section is 122-128℃, and the hot air volume is 22-27%; the hot air temperature of the second oven section is 132-135℃, and the hot air volume is 30-35%; the hot air temperature of the third oven section is 135-138℃, and the hot air volume is 32-38%; the hot air temperature of the fourth oven section is 132-135℃, and the hot air volume is 30-35%.

[0031] Alternatively, when the hot air drying oven has 6 sections, the time for the fiber web to pass through the hot air drying oven mechanism is 16-20 seconds.

[0032] The hot air temperature of the first oven section is 115-121℃, and the hot air volume is 20-25%; the hot air temperature of the second oven section is 122-126℃, and the hot air volume is 24-28%; the hot air temperature of the third oven section is 130-134℃, and the hot air volume is 26-30%; the hot air temperature of the fourth oven section is 130-134℃, and the hot air volume is 26-30%; the hot air temperature of the fifth oven section is 122-126℃, and the hot air volume is 24-28%; the hot air temperature of the sixth oven section is 113-117℃, and the hot air volume is 20-24%.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] This invention features a jacquard pattern formed by a needle-free area on the carding cloth of the upper doffer roller in a traditional carding machine. During the nonwoven fabric production process, after the raw material is carded into a web, the fiber web is transferred and laid out with the doffer roller. The jacquard pattern on the carding cloth creates a fiber web with a concave jacquard pattern, achieving jacquard fabric production. Subsequently, a hot air setting process solidifies the nonwoven fabric and its jacquard pattern, producing jacquard hot-air nonwoven fabric. This production system and process can complete both the hot-air nonwoven fabric production and jacquard work on a single production line, eliminating the need for secondary heating. The equipment has a small footprint and high production efficiency. Furthermore, it does not alter the traditional hot-air nonwoven fabric production process; modifications to the existing production system only require replacing the carding cloth on the uppermost doffer roller, simplifying equipment modification and facilitating upgrades.

[0035] Since the jacquard pattern of this invention is performed during the fiber web forming process before hot air consolidation, and the jacquard pattern is in a fluffy state at this time, with less fiber in the jacquard pattern area compared to traditional processes, the pattern is prone to deformation during subsequent pressing roller and hot air consolidation. To solve this problem, this invention limits the length of the carding needles, the line width of the non-carding needle area, and the spacing between adjacent non-carding needle areas. This prevents the fiber web from flattening the concave jacquard pattern when passing through the pressing roller, thus preventing the concave jacquard pattern from forming. At the same time, this invention also adjusts the temperature and volume of the hot air during the hot air consolidation process, reducing the maximum temperature of hot air consolidation by 1-2 degrees Celsius compared to the traditional process, and strictly controlling the temperature and air volume of each section of the drying oven. This prevents the edges of the concave jacquard pattern from melting and deforming during hot air consolidation, flowing into the concave jacquard pattern area, causing the pattern to fail or the edges to become blurred and uneven. The above parameters of this invention work together as a whole to make the jacquard pattern lines of the prepared nonwoven fabric clear and neat, greatly improving the aesthetics of the jacquard hot air nonwoven fabric. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of a jacquard carding machine in one embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram (expanded view) of the needle cloth disposed on the uppermost doffer roller in one embodiment of the present invention;

[0039] In the diagram: 1. Bagged opener; 2. Coarse fiber opener; 3. Jacquard carding machine; 4. Hot air drying oven mechanism; 5. Stain detection device; 6. Online full inspection device; 7. Rewinder; 8. Feeding mechanism; 9. Pre-carding cylinder mechanism; 10. Transfer roller; 11. Main cylinder mechanism; 12. Doffer roller; 13. Cotton condensing mechanism; 14. Cotton stripping mechanism; 15. Output curtain; 16. Feed curtain; 17. Feed guide roller; 18. Cotton condensing roller one. 19. Main cylinder; 20. Stripping roller 1; 21. Working roller 1; 22. Main cylinder; 23. Stripping roller 2; 24. Working roller 2; 25. Doffer roller; 26. Carding cloth; 27. Combing needle; 28. Coagulating roller 2; 29. ​​Randomizing roller; 30. Stripping roller; 31. Stripping roller; 32. Pressing roller; 33. Hot air oven; 34. Air pressure cotton box; 35. Cotton storage box; 36. Conveying pipe; 37. Area without combing needle. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The present invention will now be described in further detail with reference to the accompanying drawings.

[0044] Example 1:

[0045] like Figure 1-3The embodiment of the jacquard hot air nonwoven fabric production system of the present invention shown includes a pack opener 1, a coarse fiber opener 2, a jacquard carding machine 3, a hot air drying oven mechanism, and a winding machine 7 arranged sequentially in the material travel direction; the jacquard carding machine includes a carding machine body, the carding machine body includes one or more doffer rollers 12 arranged from top to bottom, the doffer roller 12 includes a doffer roller cylinder 25, a card cloth 26 wrapped on the doffer roller cylinder 25, and a plurality of carding needles 37 evenly arranged on the card cloth 26; wherein at least one doffer roller 12 has a plurality of cardless areas 37 without carding needles 27 on the card cloth 26, the cardless areas 37 are linear cardless areas, the plurality of cardless areas 37 form a jacquard pattern as a whole, and the plurality of doffer rollers 12 with jacquard patterns are arranged sequentially from top to bottom, starting from the uppermost doffer roller. This invention features a jacquard pattern formed by areas without comb needles on the upper doffer roller needle cloth 26 of a traditional carding machine. This structure allows for the creation of a fiber web with a concave jacquard pattern during the nonwoven fabric production process, as the raw material is carded into a web in the carding machine and the fiber web is transferred and laid out with the doffer roller 12. Subsequently, a hot air setting operation is performed to set the nonwoven fabric and its jacquard pattern, producing jacquard hot air nonwoven fabric. This production system and process do not alter the traditional hot air nonwoven fabric production steps. Modification of the existing production system only requires replacing the needle cloth 26 on the doffer roller 25, simplifying equipment modification and facilitating upgrades. Furthermore, using this invention's production system for jacquard hot air nonwoven fabric production results in low equipment cost, high production efficiency, and eliminates the need for secondary heating, significantly reducing energy consumption and production costs.

[0046] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the length of the comb needle is 1-2 mm;

[0047] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the line width of the linear needleless area is greater than or equal to 5 mm.

[0048] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the spacing between adjacent needle-free areas 37 is greater than or equal to 8 mm (preferably greater than or equal to 10 mm). The present invention controls the needle length, the line width of the needle-free area, and the spacing between adjacent needle-free areas to ensure that the jacquard pattern is neat and beautiful, and avoids the concave jacquard pattern being flattened when passing through the pressure roller 32 in subsequent processes, thus preventing the concave jacquard pattern from forming; it also avoids the situation where the edges of the jacquard pattern are blurred and not formed due to the hot air temperature being too high during hot air consolidation, causing the hot air to melt and flow to the concave jacquard pattern area; the present application realizes jacquard in the nonwoven fabric production process by controlling the above parameters.

[0049] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the frame of the carding machine body is arranged in sequence according to the material travel direction, including a feeding mechanism 8, a pre-carding cylinder mechanism 9, a transfer roller 10, a main cylinder mechanism 11, two doffer rollers 12, two cotton stripping mechanisms 14, and two output curtains 15 respectively arranged below the corresponding cotton stripping mechanisms 14. The two doffer rollers 12, the two cotton stripping mechanisms 14, and the two output curtains 15 are divided into upper and lower groups. The doffer rollers 12, the cotton stripping mechanisms 14, and the output curtains 15 in either the upper or lower group are arranged in the material travel sequence.

[0050] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, in the two doffer rollers, the upper doffer roller needle cloth is provided with a jacquard pattern, while the lower doffer roller needle cloth is not provided with a jacquard pattern.

[0051] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the feeding mechanism 8 includes a feeding curtain 16, a feeding guide roller 17 and a coagulating roller 18 arranged sequentially in the material travel direction.

[0052] The pre-combing cylinder mechanism 9 includes a chest cylinder 19 and a stripping roller 20 and a working roller 21 disposed above the chest cylinder 19;

[0053] The main cylinder mechanism 11 includes a main cylinder 22, and a stripping roller 23 and a working roller 24 disposed above the main cylinder 22;

[0054] The cotton stripping mechanism 14 includes a cotton stripping roller 30 and a stripping roller 31 arranged in sequence.

[0055] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the carding machine body further includes two cotton condensing mechanisms 13, which are respectively arranged between corresponding doffer rollers 12 and cotton stripping mechanisms 14.

[0056] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the cotton condensing mechanism 13 includes a condensing roller 28 and a randomizing roller 29 arranged in sequence.

[0057] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, a cotton pressing roller 32 is also provided between the jacquard carding machine 3 and the hot air drying oven mechanism 4.

[0058] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, a stain detection device 5 and an online full inspection device 6 are also provided between the hot air drying oven mechanism and the winding machine 7.

[0059] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the hot air drying oven mechanism 4 includes a box body and several hot air drying ovens 33 disposed inside the box body.

[0060] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the hot air oven has 4-6 sections.

[0061] As an embodiment of the jacquard hot air nonwoven fabric production system of the present invention, the inlet end of the jacquard carding machine 3 is provided with a pneumatic cotton box 34, and a cotton storage box 35 is provided between the coarse fiber opener 2 and the pneumatic cotton box 34. The coarse fiber opener 2 and the cotton storage box 35, as well as the cotton storage box 35 and the pneumatic cotton box 34, are all connected through a conveying pipe 36.

[0062] Example 2:

[0063] A jacquard hot air nonwoven fabric production process is disclosed, which uses the hot air jacquard production system described in Example 1 to produce jacquard nonwoven fabric. The hot air jacquard production system has two doffer rollers and four hot air drying ovens. The upper doffer roller has a jacquard pattern on its needle cloth, while the lower doffer roller does not have a jacquard pattern. The length of the comb needles on the needle cloth is 1 mm. The line width of the linear comb needle-free area is 6 mm. The spacing between adjacent comb needle-free areas is 10 mm.

[0064] Its production process specifically includes the following steps:

[0065] Step 1: Mix 2D PE fiber raw material and 1.2PET fiber raw material at a ratio of 30:70, open and mix them using a coarse opener, and then put them into a jacquard carding machine. During the process of carding the jacquard carding machine into a web, the two doffer rollers rotate at the same speed. The lower doffer roller without jacquard pattern forms a flat fiber web layer, while the upper doffer roller with jacquard pattern forms a hollow jacquard pattern in the corresponding area because there are no card needles in the jacquard pattern area. Then the two fiber web layers are stacked to form a fiber web with a concave jacquard pattern on the upper surface.

[0066] Step 2: The fiber web with a concave jacquard pattern on the upper surface enters the hot air drying oven through the pressing roller for hot air consolidation to obtain jacquard hot air nonwoven fabric;

[0067] In this embodiment, the time for the fiber web to pass through the hot air drying oven mechanism is controlled to be 12 seconds;

[0068] The temperature of the first hot air oven is 122 degrees Celsius and the air volume is 27%.

[0069] The temperature of the second hot air oven is 132 degrees Celsius and the air volume is 30%.

[0070] The temperature of the third hot air oven is 135 degrees Celsius and the air volume is 32%.

[0071] The temperature of the fourth section hot air oven is 132 degrees Celsius, and the air volume is 30%.

[0072] Example 3:

[0073] A jacquard hot air nonwoven fabric production process is the same as in Example 2, except that the length of the comb needles is 2mm.

[0074] The parameters for the 4-section hot air oven are set as follows:

[0075] The temperature of the first hot air oven is 128 degrees Celsius and the air volume is 30%.

[0076] The temperature of the second hot air oven is 135 degrees Celsius and the air volume is 35%.

[0077] The temperature of the third hot air oven is 138 degrees Celsius and the air volume is 38%.

[0078] The temperature of the fourth section hot air oven is 135 degrees Celsius, and the air volume is 35%.

[0079] Example 4:

[0080] A jacquard hot air nonwoven fabric production process is the same as in Example 2, except that the hot air oven has 6 sections and the time for the fiber web to pass through the hot air oven mechanism is controlled to be 18 seconds.

[0081] The parameters for the 6-section hot air oven are set as follows:

[0082] The temperature of the first hot air oven is 118 degrees Celsius and the air volume is 22%.

[0083] The temperature of the second hot air oven is 124 degrees Celsius and the air volume is 26%.

[0084] The temperature of the third hot air oven is 132 degrees Celsius and the air volume is 28%.

[0085] The temperature of the fourth section hot air oven is 132 degrees Celsius, and the air volume is 28%.

[0086] The temperature of the fifth section hot air oven is 124 degrees Celsius and the air volume is 26%.

[0087] The temperature of the sixth section hot air oven is 115 degrees Celsius, and the air volume is 22%.

[0088] Comparative Example 1

[0089] A jacquard hot-air nonwoven fabric production process is the same as in Example 2, except that...

[0090] The temperature of the first hot air oven is 105 degrees Celsius and the air volume is 15%.

[0091] The temperature of the second hot air oven is 120 degrees Celsius and the air volume is 18%.

[0092] The temperature of the third hot air oven is 140 degrees Celsius and the air volume is 88%.

[0093] The temperature of the fourth section hot air oven is 130 degrees Celsius, and the air volume is 18%.

[0094] Comparative Example 2

[0095] A jacquard hot-air nonwoven fabric production process is the same as in Example 2, except that...

[0096] The temperature of the first hot air oven is 130 degrees Celsius and the air volume is 50%.

[0097] The temperature of the second hot air oven is 142 degrees Celsius and the air volume is 60%.

[0098] The temperature of the third hot air oven is 145 degrees Celsius and the air volume is 90%.

[0099] The temperature of the fourth section hot air oven is 142 degrees Celsius, and the air volume is 60%.

[0100] Comparative Example 3

[0101] A jacquard hot-air nonwoven fabric production process is the same as in Example 2, except that...

[0102] The comb needles are 0.6 mm long;

[0103] The line width of the linear, needle-free area is 4mm.

[0104] Comparative Example 4

[0105] A jacquard hot air nonwoven fabric production process is the same as in Example 2, except that the rotational speed of the upper doffer roller is 5% faster than that of the lower doffer roller.

[0106] Example of effect

[0107] Twenty professionals scored and evaluated the jacquard quality of the jacquard hot-air nonwoven fabrics prepared in Examples 2-4 and Comparative Examples 1-4, and calculated the average score. The results are shown in Table 1.

[0108] Evaluation criteria:

[0109] 90-100 points: The edges of the jacquard pattern are sharp and do not collapse; the lines are of uniform thickness and all lines are easily identifiable; the overall pattern is extremely clear and regular.

[0110] 80-90 points: The edges of the jacquard pattern are sharp and angular, with occasional collapses. The thickness of the lines is sometimes uneven, and some lines are sometimes indistinguishable. The overall pattern is relatively clear and regular.

[0111] 70-80 points: The edges of the jacquard pattern are blurry and some parts are collapsed. The thickness of the lines is uneven and some lines are unrecognizable. The overall pattern is blurry and irregular.

[0112] Below 70 points: The edges and corners of the jacquard pattern are severely blurred, most of them are collapsed, most of the lines are unrecognizable, and the overall pattern is very blurry and extremely irregular;

[0113] Table 1

[0114] Rating (points) Example 2 97 Example 3 99 Example 4 99 Comparative Example 1 76 Comparative Example 2 62 Comparative Example 3 67 Comparative Example 4 64

[0115] The embodiments described above are merely preferred embodiments of the present invention, and not an exhaustive list of all possible implementations of the present invention. Any obvious modifications made by those skilled in the art without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims of the present invention.

Claims

1. A production system for jacquard hot air nonwoven fabric, characterized in that, The package includes a pack opener (1), a coarse fiber opener (2), a jacquard carding machine (3), a hot air drying oven mechanism (4), and a winding machine (7), arranged in sequence according to the material travel direction. The jacquard carding machine includes a carding machine body, which includes a frame and one or more doffer rollers (12) arranged from top to bottom on the frame. The doffer roller (12) includes a doffer roller cylinder (25), a card cloth (26) wrapped around the doffer roller cylinder (25), and a number of card needles (27) evenly arranged on the card cloth (26). At least one doffer roller (12) has a number of cardless areas (37) without card needles (27) on the card cloth (26). The cardless areas (37) are linear cardless areas. The cardless areas (37) together form a jacquard pattern. The doffer rollers (12) with jacquard patterns are arranged sequentially from top to bottom, starting from the uppermost doffer roller. A cotton pressing roller (32) is also provided between the jacquard carding machine (3) and the hot air drying oven mechanism (4); The length of the comb needle is 1-2mm; the line width of the linear area without comb needles is greater than or equal to 5mm. The spacing between adjacent areas without comb needles (37) is greater than or equal to 8 mm.

2. The jacquard hot air nonwoven fabric production system according to claim 1, characterized in that, The frame of the carding machine is provided with a feeding mechanism (8), a pre-carding cylinder mechanism (9), a transfer roller (10), a main cylinder mechanism (11), two doffer rollers (12), two cotton stripping mechanisms (14), and two output curtains (15) respectively located below the corresponding cotton stripping mechanisms (14) in the direction of material travel. The two doffer rollers (12), two cotton stripping mechanisms (14), and two output curtains (15) are divided into upper and lower groups. The doffer rollers (12), cotton stripping mechanisms (14), and output curtains (15) of either the upper or lower group are arranged in the order of material travel.

3. The jacquard hot air nonwoven fabric production system according to claim 2, characterized in that, The feeding mechanism (8) includes a feeding curtain (16), a feeding guide roller (17) and a coagulation roller (18) arranged sequentially in the material travel direction. The pre-combing cylinder mechanism (9) includes a chest cylinder (19) and a stripping roller (20) and a working roller (21) disposed above the chest cylinder (19). The main cylinder mechanism (11) includes a main cylinder (22), and a second stripping roller (23) and a second working roller (24) disposed above the main cylinder (22). The cotton stripping mechanism (14) includes a cotton stripping roller (30) and a stripping roller (31) arranged in sequence.

4. The jacquard hot air nonwoven fabric production system according to claim 2, characterized in that, It also includes two cotton-coating mechanisms (13), which are respectively disposed between the corresponding doffer rollers (12) and cotton-removing mechanisms (14); The cotton condensing mechanism (13) includes a second condensing roller (28) and a randomizing roller (29) arranged in sequence.

5. The jacquard hot air nonwoven fabric production system according to claim 1, characterized in that, A stain detection device (5) and an online full inspection device (6) are also provided between the hot air drying oven mechanism and the winding machine (7).

6. A jacquard hot-air nonwoven fabric production system according to any one of claims 1-5, characterized in that, The hot air drying oven mechanism includes 3-8 sections of hot air drying oven arranged in sequence.

7. A production process for jacquard hot-air nonwoven fabric, characterized in that, The production of jacquard hot-air nonwoven fabric using the production system described in claim 6 specifically includes the following steps: Step 1: After the fiber raw material is opened and mixed by a coarse opener, it enters the jacquard carding machine. During the process of carding the jacquard carding machine into a web, each doffer roller runs at the same speed. The doffer rollers without jacquard patterns at the bottom form a flat fiber web layer, while the doffer rollers with jacquard patterns at the top form a hollow jacquard pattern in the corresponding area because there are no card needles in the jacquard pattern area. Then all the fiber web layers are stacked to form a fiber web with a concave jacquard pattern on the upper surface. Step 2: The fiber web with a concave jacquard pattern on the upper surface enters the hot air drying oven mechanism through the cotton pressing roller. The time for the fiber web to pass through the hot air drying oven mechanism is controlled to be 3-30 seconds. The fiber web is hot air solidified under the action of 110-140 degrees Celsius and 20-80% hot air volume to obtain jacquard hot air nonwoven fabric.

8. The production process of jacquard hot-air nonwoven fabric according to claim 7, characterized in that, The hot air consolidation conditions are as follows: the hot air oven has 4 sections, and the time for the fiber web to pass through the hot air oven mechanism is 8-16 seconds. The hot air temperature of the first section of the oven is 110-130℃, and the hot air volume is 20-35%; the hot air temperature of the second section of the oven is 120-135℃, and the hot air volume is 20-40%; the hot air temperature of the third section of the oven is 130-140℃, and the hot air volume is 20-40%; the hot air temperature of the fourth section of the oven is 125-135℃, and the hot air volume is 20-40%. Alternatively, when the hot air drying oven has 6 sections, the time for the fiber web to pass through the hot air drying oven mechanism is 14-22 seconds. The hot air temperature of the first oven section is 110-125℃, and the hot air volume is 18-32%. The hot air temperature of the second oven section is 117-128℃, and the hot air volume is 24-28%. The hot air temperature of the third oven section is 125-138℃, and the hot air volume is 22-35%. The hot air temperature of the fourth oven section is 125-138℃, and the hot air volume is 22-35%. The hot air temperature of the fifth oven section is 120-130℃, and the hot air volume is 22-35%. The hot air temperature of the sixth oven section is 110-120℃, and the hot air volume is 18-28%.

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