Elastic cotton fabric and its production process and equipment

Abstract

This invention discloses an elastic soft fabric and its production process and apparatus, comprising a first nonwoven fabric layer, a second nonwoven fabric layer, and an elastic film layer. The elastic film layer is located between the first and second nonwoven fabric layers, and the first, second, and elastic film layers are ultrasonically welded together. The elastic film layer is elastically stretchable; during ultrasonic welding, the elastic film layer is in a stretched state, and the elastic soft fabric can elastically expand and contract along its length, exhibiting both a relaxed and elastically stretched state. This invention possesses excellent elasticity and breathability, meeting diverse application requirements.

Description

Technical Field

[0001] This invention relates to the field of nonwoven fabric technology, and more specifically, to an elastic soft fabric, a production process for the elastic soft fabric, and a production apparatus for the elastic soft fabric. Background Technology

[0002] Nonwoven fabric, also widely known as non-woven cloth or non-woven material, is composed of fibers arranged in an oriented or random pattern. In specific applications, such as disposable underwear and diapers, nonwoven fabrics require elasticity and breathability. To meet this need, a common solution is to laminate and bond elastic fibers to the surface of the nonwoven fabric, giving it the necessary elasticity and enabling it to adapt to diverse product usage requirements.

[0003] While the elastic yarn solution is effective, it also has limitations. First, the force-bearing capacity of a single elastic yarn is limited, and multiple elastic yarns are usually arranged side by side to form a sufficient width and elastic coverage area to meet the requirements of overall elastic performance. Moreover, there are inevitable gaps between elastic yarns, which weaken the overall elasticity uniformity of the nonwoven fabric, thereby affecting the elastic stretching effect of the fabric and the user experience.

[0004] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an elastic soft fabric with good elasticity and breathability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An elastic soft fabric includes a first nonwoven layer, a second nonwoven layer, and an elastic film layer, wherein the elastic film layer is located between the first nonwoven layer and the second nonwoven layer, and the first nonwoven layer, the second nonwoven layer, and the elastic film layer are ultrasonically welded together.

[0008] The elastic membrane layer can be elastically stretched, and the elastic soft fabric can elastically stretch and contract along its length, having a relaxed state and an elastically stretched state. In the relaxed state, the elastic membrane layer is at its initial length, and the first nonwoven fabric layer and the second nonwoven fabric layer form several pleats. In the elastically stretched state, the elastic membrane layer is elastically stretched, and the pleats of the first nonwoven fabric layer and the second nonwoven fabric layer are relaxed.

[0009] The present invention is further configured such that the elastic membrane layer has a plurality of through holes.

[0010] The present invention is further configured such that the connection positions between the first nonwoven fabric layer, the second nonwoven fabric layer and the elastic film layer are distributed in a dotted manner, forming a plurality of dotted welding parts.

[0011] The present invention is further configured such that the welded portion of the elastic membrane layer is through-hole.

[0012] The present invention is further configured such that the welding portion is a plurality of columns, and the welding portions in each column are arranged side by side at intervals along the width direction of the elastic soft fabric; in each column of welding portions, each welding portion is evenly spaced along the length direction of the elastic soft fabric.

[0013] The present invention is further configured such that, in the relaxed state, the first nonwoven fabric layer and the second nonwoven fabric layer form wrinkles between two adjacent welded portions along the length direction of the elastic soft fabric.

[0014] The present invention also provides a production process for elastic soft fabric, wherein the elastic membrane layer is stretched along the length direction, and the elastic membrane layer is elastically elongated; the elastically stretched elastic membrane layer is stacked with a first non-woven fabric layer and a second non-woven fabric layer, and then ultrasonically welded, and the elastically stretched elastic membrane layer and the first non-woven fabric layer and the second non-woven fabric layer are composite to obtain elastic soft fabric.

[0015] During ultrasonic welding, the elastically stretched elastic membrane layer, along with the first and second non-woven fabric layers, simultaneously passes over the support roller. The ultrasonic welding head can contact the support roller through the elastic soft cloth to achieve ultrasonic welding. The outer periphery of the support roller has a texture with several raised dots. The contact points between the raised dots and the elastic soft cloth form a welding part. The elastic soft cloth is relatively stationary with respect to the outer periphery of the support roller, but moves relative to the ultrasonic welding head. During ultrasonic welding, the elastic membrane layer of the welding part is melted and penetrated to form a through hole.

[0016] The present invention also provides a production apparatus for elastic soft fabric, comprising a first unwinding assembly, a second unwinding assembly, a film forming assembly, a stretching assembly, an ultrasonic welding assembly, and a winding assembly;

[0017] The first unwinding assembly is used to supply the first nonwoven fabric layer, the second unwinding assembly is used to supply the second nonwoven fabric layer, the film forming assembly is used for extruding the elastic film layer, and the stretching assembly is located downstream of the film forming assembly and is used to elastically stretch the elastic film layer.

[0018] The ultrasonic welding assembly includes a support roller, an ultrasonic welding head, and a telescopic rod. The support roller is used for the elastic membrane layer, the first non-woven fabric layer, and the second non-woven fabric layer to pass around simultaneously. The ultrasonic welding head is installed on the outer periphery of the support roller through the telescopic rod, and the ultrasonic welding head can abut against the outer periphery of the support roller to realize ultrasonic welding.

[0019] The winding assembly is used to wind up the composite elastic cotton fabric.

[0020] The present invention is further configured such that two sets of ultrasonic welding heads are provided, both located on the upper part of the support roller; each set of ultrasonic welding heads is evenly spaced along the axial direction of the support roller and achieves synchronous lifting and lowering action; the two sets of ultrasonic welding heads are staggered; and in the same set, the interval width between two adjacent ultrasonic welding heads is smaller than the width of the ultrasonic welding head.

[0021] The present invention is further configured such that the outer periphery of the support roller has a texture with a plurality of raised dots;

[0022] The present invention is further configured such that the film-forming assembly includes an extrusion mechanism and a cooling forming roller, the extrusion mechanism being located above the cooling forming roller and used to extrude the raw material of the elastic film layer outside the cooling forming roller, and the cooling forming roller being used to cool and form the elastic film layer;

[0023] The present invention is further configured to include a punching component, which is located between the ultrasonic welding component and the winding component and is used to punch holes in the elastic soft fabric.

[0024] The invention is further configured to include a buffer component located between the ultrasonic welding component and the winding component, for temporarily storing the elastic soft fabric to be wound. The buffer component includes several buffer rollers, and the elastic soft fabric passes around each buffer roller in sequence. The winding length of the elastic soft fabric is changed by adjusting the position of the buffer rollers.

[0025] In summary, the present invention has the following beneficial effects:

[0026] The structure consists of a first nonwoven fabric layer, a second nonwoven fabric layer, and an elastic membrane layer, forming a three-layer composite structure. The elastic membrane layer is located between the two nonwoven fabric layers, and the three layers are bonded together by ultrasonic welding to form a whole. The elastic membrane has good elasticity, and during the ultrasonic welding process, the elastic membrane is in an elastic stretching state, which makes the composite nonwoven fabric have good elastic stretching properties.

[0027] The elastic soft fabric of the present invention is composited by ultrasonic welding. During the ultrasonic welding process, not only can the layers be melted and bonded to form a whole, but also the elastic film layer can be penetrated to form a dense network of through holes.

[0028] The two non-woven fabric layers are elastic, and the elastic membrane layer in the middle has several through holes, which makes the elastic membrane layer breathable, thus making the composite non-woven fabric as a whole have good breathability. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the structure of a production device for elastic soft fabric in Example 1;

[0030] Figure 2 This is a schematic diagram of the structure of the stretching roller group and the ultrasonic welding assembly in Example 1;

[0031] Figure 3 for Figure 2 Sectional view of AA;

[0032] Figure 4 This is a schematic diagram of the protrusions on the surface of the support roller in Example 1;

[0033] Figure 5 This is a schematic diagram of the punching component in Embodiment 1;

[0034] Figure 6 This is a schematic diagram of the elastic stretching state of a type of elastic soft fabric in Example 2;

[0035] Figure 7 This is a schematic diagram of the contracted state of an elastic soft fabric in Example 2;

[0036] Figure 8 This is a schematic diagram of the elastic membrane layer in Example 2;

[0037] Figure 9 This is a schematic diagram of the welding device in Example 3;

[0038] Figure 10 This is a schematic diagram of the structure of the connecting seat and the ultrasonic welding head in Example 3.

[0039] Reference numerals: 1. First unwinding assembly; 2. Second unwinding assembly; 3. Film forming assembly; 4. Stretching assembly; 41. Stretching roller group; 411. Stretching roller body one; 412. Stretching roller body two; 5. Ultrasonic welding assembly; 51. Support roller; 511. Protrusion; 512. Gap one; 513. Gap two; 52. Welding device; 521. Support frame; 522. Telescopic rod; 5221. Telescopic part; 523. Ultrasonic welding head; 5231. Welding surface; 524. Connecting seat; 525. Rotating shaft; 526. 527. Limiting bolt; 528. Limiting tube; 529. Adjusting bolt; 520. Slider; 5210. Spring; 6. Perforation assembly; 61. Needle roller; 62. Lifter; 63. Passive conveyor roller; 64. Active conveyor roller; 7. Buffer assembly; 8. Winding assembly; 100. Elastic soft fabric; 101. First nonwoven fabric layer; 102. Second nonwoven fabric layer; 103. Elastic film layer; 1031. Through hole; 1032. Connecting part one; 1033. Connecting part two; 104. Welding part; 105. Pleated part. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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] Example 1

[0042] This embodiment discloses a production apparatus for elastic soft fabric, referring to... Figure 1 As shown, it includes a first unwinding assembly 1, a second unwinding assembly 2, a film forming assembly 3, a stretching assembly 4, an ultrasonic welding assembly 5, and a winding assembly 8. The first unwinding assembly 1 is used to supply the first nonwoven fabric layer 101, and the second unwinding assembly 2 is used to supply the second nonwoven fabric layer 102. The two unwinding assemblies can unwind the nonwoven fabric material and keep the nonwoven fabric flat and smooth through the corresponding correction mechanism.

[0043] The film-forming assembly 3 is capable of extruding the elastic film layer 103. The film-forming assembly 3 includes an extrusion mechanism and a cooling forming roller. The extrusion mechanism is located above the cooling forming roller and can melt and extrude the raw material of the elastic film layer 103 outside the cooling forming roller. The cooling forming roller cools and forms the elastic film layer 103 outside the cooling forming roller. After cooling and forming, the elastic film layer 103 is in its initial state and has good elastic tensile properties.

[0044] The stretching component 4 is located downstream of the film-forming component 3 and is capable of elastically stretching the elastic film layer 103.

[0045] Reference Figure 2 As shown, the stretching assembly 4 includes three or more stretching roller groups 41. Each stretching roller group 41 includes a first stretching roller body 411 and a second stretching roller body 412. The elastic film layer 103 passes between the first stretching roller body 411 and the second stretching roller body 412, and is able to press against the elastic film layer 103. The contact position has a certain frictional force. The conveying speed of each stretching roller group 41 gradually increases, so that the elastic film layer 103 passing through each stretching roller group 41 is gradually stretched, forming an elastically stretched elastic film layer 103.

[0046] The ultrasonic welding assembly 5 includes a support roller 51, an ultrasonic welding head 523, and a telescopic rod 522. The support roller 51 serves as a support and is rotatably mounted on the frame. The support roller 51 allows each layer of fabric to pass over it. In this embodiment, the elastic membrane layer 103, which can be elastically stretched, passes over the first nonwoven fabric layer 101 and the second nonwoven fabric layer 102 simultaneously, and the layers are in a stacked state.

[0047] The fixed part of the telescopic rod 522 is mounted on the support frame 521, and the ultrasonic welding head 523 is mounted on the telescopic part of the telescopic rod 522. The ultrasonic welding head 523 is mounted on the outer periphery of the support roller 51 through the telescopic rod 522. When the telescopic rod 522 extends or retracts, the ultrasonic welding head 523 can abut against the outer periphery of the support roller 51 to achieve ultrasonic welding.

[0048] Reference Figure 4 As shown, a texture of several raised dots 511 is formed on the outer periphery of the support roller 51. When the ultrasonic welding head 523 presses against the support roller 51 through the elastic soft cloth, the pressure mainly falls on the raised dots 511 because they protrude outwards. This allows ultrasonic welding to be achieved at the corresponding position of the elastic soft cloth, forming a welding point opposite to the raised dots 511.

[0049] The winding assembly 8 is installed at the end of the equipment and is capable of winding up the composite elastic soft fabric.

[0050] Furthermore, during the ultrasonic welding process, the support roller 51 rotates slowly, gradually conveying the elastically stretched elastic film layer 103, the first nonwoven fabric layer 101, and the second nonwoven fabric layer 102, which are wrapped around the support roller 51. During the conveying process, the telescopic rod 522 pushes the ultrasonic welding head 523, causing the ultrasonic welding head 523 to abut against the outside of the support roller 51, thereby performing ultrasonic welding on the elastic soft fabric.

[0051] During ultrasonic welding, the elastic soft fabric and the outer periphery of the support roller 51 are relatively stationary, while the ultrasonic welding head 523 moves relative to the support roller 51. Therefore, a small displacement is formed between the surface of the elastic soft fabric and the ultrasonic welding head 523, which increases the size of the welded portion 10 on the surface of the elastic soft fabric. The elastic membrane layer 103 of the welded portion 10 is melted and penetrated to form a through hole 1031. After the elastic membrane layer 103 is melted and penetrated, it has a breathable effect. The first unwinding assembly 1 and the second unwinding assembly 2 are themselves breathable, making the composite elastic soft fabric breathable as a whole.

[0052] Furthermore, the production apparatus also includes a perforation assembly 6, located between the ultrasonic welding assembly 5 and the winding assembly 8, which serves to perforate the elastic soft fabric. Punching the elastic film layer 103 with a needle roller increases the permeability of the elastic film layer 103.

[0053] Reference Figure 5As shown, the perforation assembly 6 includes a needle roller 61 and a lifting device 62. The lifting device 62 can adjust the position of the needle roller 61, changing its position. During production, the elastic soft fabric is wrapped around the needle roller 61, allowing it to puncture the elastic membrane layer 103 on the surface of the needle roller 61, forming holes. Additionally, the perforation assembly 6 also includes a passive conveying roller 63 and an active conveying roller 64. The passive conveying roller 63 and the active conveying roller 64 press against each other, and the composite nonwoven fabric passes between them. The active rotation of the active conveying roller 64 transports the elastic soft fabric, allowing the fabric to be smoothly conveyed backward.

[0054] Furthermore, the production device also includes a buffer assembly 7, located between the ultrasonic welding assembly 5 and the winding assembly 8, which temporarily stores the elastic soft fabric to be wound. Approximately 20 meters of elastic soft fabric are temporarily stored in the buffer assembly 7. When differences in conveying speed occur between the front and rear of the equipment, the buffer assembly releases and absorbs the excess fabric, thus stabilizing the operation. The buffer assembly 7 includes several buffer rollers, around which the elastic soft fabric sequentially wraps. The length of the fabric wrapped around each buffer roller is the length of the buffered fabric. During adjustment, the wrapping length of the elastic soft fabric can be changed by adjusting the position of the buffer rollers, thereby lengthening or shortening the length of the fabric wrapped around each buffer roller to stabilize the equipment operation.

[0055] Furthermore, referring to Figure 2 , Figure 3 As shown, the ultrasonic welding heads 523 in this embodiment can be divided into two groups, both located on the upper part of the support roller 51. In the same group, the ultrasonic welding heads 523 are evenly spaced along the axial direction of the support roller 51 and achieve synchronous lifting and lowering. The two groups of ultrasonic welding heads 523 are staggered. This staggered distribution of the ultrasonic welding heads 523 can compensate for the interval between two adjacent ultrasonic welding heads 523, thereby ensuring complete coverage in the width direction of the nonwoven fabric and ensuring the integrity of the ultrasonic welding.

[0056] Reference Figure 3 As shown, the width of each ultrasonic welding head 523 is equal, and in the same group, the spacing between two adjacent ultrasonic welding heads 523 is smaller than the width of the ultrasonic welding head 523.

[0057] Example 2

[0058] This embodiment discloses an elastic soft fabric, which is produced using the production apparatus described in the above embodiment, and refers to... Figure 6 , Figure 7 , Figure 8 Please provide an explanation.

[0059] Reference Figure 6 , Figure 7 As shown, the elastic soft fabric includes a first nonwoven layer 101, a second nonwoven layer 102, and an elastic film layer 103. The elastic film layer 103 is located between the first nonwoven layer 101 and the second nonwoven layer 102. The first nonwoven layer 101, the second nonwoven layer 102, and the elastic film layer 103 are ultrasonically welded together.

[0060] The elastic membrane layer 103 is elastically stretchable, and the elastic soft fabric is elastically expandable and contractable along its length, exhibiting both a relaxed state and an elastically stretched state. During ultrasonic welding, the elastic membrane layer 103 is in an elastically stretched state, and after completion, the elastic membrane layer 103 elastically contracts. That is, along the length of the elastic soft fabric, the lengths of the first nonwoven layer 101 and the second nonwoven layer 102 are greater than the initial length of the elastic membrane layer 103.

[0061] In the relaxed state, the elastic membrane layer 103 is at its initial length, and the first nonwoven fabric layer 101 and the second nonwoven fabric layer 102 form a number of pleats 105; in the elastically stretched state, the elastic membrane layer 103 is elastically stretched, and the pleats 105 of the first nonwoven fabric layer 101 and the second nonwoven fabric layer 102 are stretched out.

[0062] A plurality of through holes 1031 are provided in the elastic membrane layer 103. Since the elastic membrane layer 103 is a membrane-like structure, it is breathable by opening holes; and the first non-woven fabric layer 101 and the second non-woven fabric layer 102 are breathable themselves, so that the elastic soft fabric 100 is breathable as a whole.

[0063] Reference Figure 8 As shown, the connection points between the first nonwoven fabric layer 101, the second nonwoven fabric layer 102, and the elastic film layer 103 are distributed in a dotted pattern, forming a plurality of dotted welding portions 104. Connection portions are formed between the dotted welding portions 104. The connection portion of the elastic film layer 103 is not directly welded to the first nonwoven fabric layer 101 or the second nonwoven fabric layer 102, thereby allowing the first nonwoven fabric layer 101 and the second nonwoven fabric layer 102 to form wrinkles 105 at corresponding positions of the connection portions.

[0064] The corresponding welding parts 104 are divided into several columns. Each column of welding parts 104 is arranged side by side and spaced apart along the width of the elastic soft fabric. A connecting part 2 1033 is formed between two adjacent columns of welding parts 104. In each column of welding parts 104, each welding part 104 is evenly spaced along the length of the elastic soft fabric. A connecting part 1032 is formed between two adjacent welding parts 104.

[0065] Along the length of the elastic soft fabric, in the relaxed state, the first nonwoven layer 101 and the second nonwoven layer 102 form pleats 105 between two adjacent welded portions 104. These pleats 105 create spaces to cushion the length of the nonwoven fabric, and because the pleats 105 are small and tightly arranged, they only increase the thickness of the nonwoven fabric as a whole, without creating noticeably large wrinkles.

[0066] During ultrasonic welding, the welded area will melt and can penetrate the welded portion 104 of the elastic membrane layer 103 to form a through hole 1031, thereby enabling the elastic membrane layer 103 and the composite nonwoven fabric as a whole to have good air permeability.

[0067] This embodiment also discloses a production process for elastic soft fabric, used to produce the elastic soft fabric in the above embodiment. In the production process of this nonwoven fabric, the elastic film layer 103 is stretched along its length, causing the elastic film layer 103 to elastically elongate. Then, the elastically stretched elastic film layer 103 is stacked with the first nonwoven fabric layer 101 and the second nonwoven fabric layer 102, and then ultrasonically welded. The elastically stretched elastic film layer 103, the first nonwoven fabric layer 101, and the second nonwoven fabric layer are then combined to obtain the elastic soft fabric.

[0068] During ultrasonic welding, the elastic membrane layer 103, the first nonwoven fabric layer 101, and the second nonwoven fabric layer 102 simultaneously pass around the support roller 51, and the ultrasonic welding head 523 can abut against the support roller 51 through the elastic soft cloth to achieve ultrasonic welding.

[0069] The outer periphery of the support roller 51 has a texture with several raised dots 511, and the contact points between the raised dots 511 and the elastic soft fabric form a welded part 104. Furthermore, during the production process, the support roller 51 rotates continuously, while the elastic soft fabric remains relatively stationary relative to the outer periphery of the support roller 51 and moves relative to the ultrasonic welding head 523. Sliding friction is generated between the surface of the elastic soft fabric and the ultrasonic welding head 523, which can increase the welding contact area. This allows the elastic membrane layer 103 of the welded part 10 to be melted and penetrated to form a through hole 1031, giving the nonwoven fabric good overall air permeability.

[0070] Example 3

[0071] This embodiment discloses a production apparatus for elastic soft fabric, which is based on Embodiment 1 and further refers to... Figure 9 , Figure 10 A detailed description is provided, further designing the ultrasonic welding assembly 5. In this embodiment, the ultrasonic welding assembly 5 is structurally similar to that of Embodiment 1, except that the difference lies only in the connection relationship between the ultrasonic welding head 523 and the telescopic rod 522. Furthermore, Figure 9Only one set of ultrasonic welding heads 523 is shown in the figure. If two sets are required, two sets can also be set.

[0072] Reference Figure 9 , Figure 10 As shown, in this embodiment, the telescopic part 5221 of the telescopic rod 522 faces the support roller 51 and is adjustable in length and retraction. A connecting seat 524 is fixedly installed on the telescopic part 5221 of the support roller 51. The ultrasonic welding head 523 is rotatably connected to the connecting seat 524 via a rotating shaft 525, which is horizontally oriented and parallel to the support roller 51. The ultrasonic welding head 523 is capable of rotating around the rotating shaft 525.

[0073] The ultrasonic welding head 523 has a welding surface 5231 on the side facing the support roller 51. During welding, the welding surface 5231 abuts against the support roller 51 through the fabric. Then, the ultrasonic welding head 523 can rotate slightly around the rotating shaft 525, and the welding surface 5231 can roll relative to the outer circumference of the welding surface 5231, thereby increasing the contact area of ​​the welding surface 5231. During the contact process, the support roller 51 will continue to rotate. The two superimposed each other can increase the contact area and time of the welding part 104 with the fabric, and increase the melting intensity at the welding part 104. This allows the elastic membrane layer 103 to be melted and penetrated, forming a good air permeability effect.

[0074] Specifically, along the extension and retraction direction of the telescopic rod 522, the axis of the rotating shaft 525 is offset from the axis of the support roller 51. Furthermore, the ultrasonic welding head 523 is limited on both sides by limiting bolts 526 and limiting tubes 527, respectively. The limiting bolts 526 are threaded to the side wall of the connecting seat 524, and their position can be adjusted by rotation. After adjustment, the position of the limiting bolts 526 can be locked and fixed by nuts. The ultrasonic welding head 523 achieves rotational limitation by abutting against the end of the limiting bolts 526.

[0075] The limiting tube 527 is installed on the other side of the ultrasonic welding head 523. The limiting tube 527 is also threaded to the side wall of the connecting seat 524. The position of the limiting tube 527 can be adjusted by rotation, and it can be locked and fixed by locking nut after adjustment. However, the limiting tube 527 does not directly press against the ultrasonic welding head 523, but plays an elastic buffering role through spring 5210 and slider 529.

[0076] Specifically, the limiting tube 527 is hollow, with an internal thread formed on the side of the limiting tube 527 facing away from the ultrasonic welding head 523, and an adjusting bolt 528 is threadedly connected to the internal thread. A slider 529 is slidably connected inside the limiting tube 527 on the side facing the ultrasonic welding head 523, with part of the slider 529 extending from the end of the limiting tube 527, allowing it to elastically contact the surface of the ultrasonic welding head 523. A spring 5210 elastically presses between the slider 529 and the adjusting bolt 528, maintaining the elastic contact between the slider 529 and the ultrasonic welding head 523. Furthermore, because the slider 529 can elastically expand and contract, it provides a certain elastic buffering effect, allowing the ultrasonic welding head 523 to rotate within this elastic space. After rotation, the welding surface 5231 will also rotate at an adaptive angle, thus creating relative movement with the support roller 51, improving the welding effect of the ultrasonic welding head 523 on elastic soft fabric.

[0077] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A production apparatus for elastic soft fabric, characterized in that, It includes a first unwinding assembly (1), a second unwinding assembly (2), a film forming assembly (3), a stretching assembly (4), an ultrasonic welding assembly (5), and a winding assembly (8); The first unwinding assembly (1) is used to supply the first nonwoven fabric layer (101), the second unwinding assembly (2) is used to supply the second nonwoven fabric layer (102), the film forming assembly (3) is used to extrude the elastic film layer (103), and the stretching assembly (4) is located downstream of the film forming assembly (3) and is used to elastically stretch the elastic film layer (103). The ultrasonic welding assembly (5) includes a support roller (51), an ultrasonic welding head (523), and a telescopic rod (522). The support roller (51) is used for the elastic membrane layer (103) to be stretched elastically, and the first non-woven fabric layer (101) and the second non-woven fabric layer (102) pass around it simultaneously. The ultrasonic welding head (523) is installed on the outer periphery of the support roller (51) through the telescopic rod (522). The ultrasonic welding head (523) can abut against the outer periphery of the support roller (51) to realize ultrasonic welding. The winding assembly (8) is used to wind up the composite elastic cotton fabric; The telescopic part (5221) of the telescopic rod (522) faces the support roller (51) and can be telescopically adjusted; a connecting seat (524) is fixedly installed on the telescopic part (5221) of the telescopic rod (522); the ultrasonic welding head (523) is rotatably connected to the connecting seat (524) through a rotating shaft (525), the rotating shaft (525) is set in a horizontal direction and is parallel to the support roller (51); the ultrasonic welding head (523) can rotate around the rotating shaft (525); The ultrasonic welding head (523) has a welding surface (5231) on the side facing the support roller (51). During welding, the welding surface (5231) abuts against the support roller (51) through the cloth. The ultrasonic welding head (523) can rotate around the rotating shaft (525), and the welding surface (5231) can roll relative to the outer peripheral surface of the welding surface (5231). Along the telescopic rod (522) telescopic direction, the axis of the rotating shaft (525) is offset from the axis of the support roller (51); the ultrasonic welding head (523) is limited on both sides by limiting bolts (526) and limiting tubes (527), and the limiting bolts (526) are threaded to the side wall of the connecting seat (524). The limiting tube (527) is installed on the other side of the ultrasonic welding head (523). The limiting tube (527) is also threaded to the side wall of the connecting seat (524). The position of the limiting tube (527) can be adjusted by rotation, and after adjustment, it can be locked and fixed by locking nut. The limiting tube (527) is hollow. An internal thread is formed inside the limiting tube (527) on the side facing away from the ultrasonic welding head (523). An adjusting bolt (528) is threadedly connected to the internal thread. A slider (529) is slidably connected inside the limiting tube (527) on the side facing the ultrasonic welding head (523). Part of the slider (529) extends out from the end of the limiting tube (527) and can elastically contact the surface of the ultrasonic welding head (523) through the slider.

2. The production apparatus for elastic soft fabric according to claim 1, characterized in that, Two sets of ultrasonic welding heads (523) are provided, both located on the upper part of the support roller (51); each set of ultrasonic welding heads (523) is evenly spaced along the axial direction of the support roller (51) and achieves synchronous lifting and lowering; the two sets of ultrasonic welding heads (523) are staggered; and in the same set, the interval width between two adjacent ultrasonic welding heads (523) is smaller than the width of the ultrasonic welding head (523).

3. The production apparatus for elastic soft fabric according to claim 1, characterized in that, The outer periphery of the support roller (51) is formed with a texture of several protrusions (511); The film-forming component (3) includes an extrusion mechanism and a cooling forming roller. The extrusion mechanism is located above the cooling forming roller and is used to extrude the raw material of the elastic film layer (103) outside the cooling forming roller. The cooling forming roller is used to cool and form the elastic film layer (103). It also includes a perforation assembly located between the ultrasonic welding assembly (5) and the winding assembly (8) for perforating the elastic soft fabric; It also includes a buffer component (7), which is located between the ultrasonic welding component (5) and the winding component (8) for temporarily storing the elastic soft fabric to be wound. The buffer component (7) includes several buffer rollers, and the elastic soft fabric passes around each buffer roller in sequence. The winding length of the elastic soft fabric is changed by adjusting the position of the buffer rollers.

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