Manufacturing device of elastic composite sheet

Abstract

The utility model discloses a manufacturing device of an elastic composite sheet. The manufacturing device comprises a fixed glue applying device, an auxiliary glue applying device, a clamping and pressing unit and a composite unit, the fixing adhesive applying device is used for intermittently applying a fixing adhesive to the surface of the outer-layer sheet continuous body and / or the inner-layer sheet continuous body; the auxiliary glue applying device is used for continuously spraying an elastic line binder to the periphery of the continuous body of the plurality of elastic lines, and the dosage of the elastic line binder is 0.0015-0.015 g / m / piece; the clamping and pressing unit comprises a first compounding point, and the inner-layer sheet continuum, the elastic line continuum and the outer-layer sheet continuum are mutually compounded to form an elastic composite sheet semi-finished product; the compounding unit comprises a second compounding point which is used for mutually jointing the inner-layer sheet continuous body and the outer-layer sheet continuous body of the elastic composite sheet semi-finished product to form a plurality of joint parts of an array. According to the utility model, the risk that the fixing adhesive is easy to permeate between the outer-layer sheet and / or the inner-layer sheet in the fixing area in the ultrasonic or hot pressing process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products technology, and particularly to the fields of diapers, baby pull-up pants, adult pull-up pants, sanitary pants and disposable underwear, and specifically to a manufacturing device for an elastic composite sheet. Background Technology

[0002] Existing shorts-type clothing items, such as diapers, baby / adult pull-up pants, sanitary pants, and disposable underwear, often require stretchability in certain areas, such as elastic waistbands and elastic loops. These areas are typically composed of an elastic composite sheet. This elastic composite sheet generally consists of an outer sheet, an inner sheet, and multiple elastic threads sandwiched between them. During the fabrication of this elastic composite sheet, to prevent the elastic threads from shrinking back, fixing zones are set to secure them. Outside of these fixing zones, the multiple elastic threads are typically sandwiched between the outer and inner sheets using an adhesive-free method. In the adhesive-free areas (outside the fixing zones), the outer and inner sheets are joined together using a thermoforming unit or an ultrasonic heat-sealing unit to form multiple spaced joints. This results in the prepared elastic composite sheet forming multiple regular pleats, similar to an accordion, hence the name "accordion pleats."

[0003] When preparing elastic composite sheets, a hot pressing unit or an ultrasonic heat sealing unit is used to join the outer and inner sheets together to form multiple spaced joints. However, in the area without adhesive (the area outside the fixed area), multiple elastic lines sandwiched between the outer and inner sheets are in a free state.

[0004] When a hot-pressing unit or ultrasonic heat-sealing unit joins the outer and inner sheets to form multiple spaced joints, the elastic threads are free between the outer and inner sheets in areas outside the fixed zone. These elastic threads tend to move around within the joint area, affecting the formation of regular wrinkles (sometimes resulting in uneven wrinkles). This phenomenon is particularly pronounced with elastic threads that have weak or thin elasticity. Furthermore, because the elastic threads are free between the outer and inner sheets, when hot-pressing (or heat-sealing) joins them to form multiple spaced joints, the movement of the elastic threads can lead to excessively small spacing (e.g., 3mm), significantly increasing the risk of the elastic threads breaking during hot-pressing (or heat-sealing).

[0005] In the preparation of elastic composite sheets, to prevent the elastic lines from shrinking back, fixing zones are set to secure them. Typically, intermittent adhesive is applied to the inner and / or outer layers in these fixing zones to secure the elastic lines. The amount of adhesive used is between 5 and 20 g / m². 2 .

[0006] The application of the fixing adhesive is done before the hot pressing unit or ultrasonic heat sealing unit. Due to the large amount of adhesive in the fixing adhesive, if the hot pressing unit or ultrasonic heat sealing unit joins the outer and inner sheets to form multiple spaced joints, the fixing adhesive may not be cured or fully cured. This can lead to adhesive seepage into the outer and / or inner sheets in the fixing area (the fixing adhesive penetrates from the inside of the outer and / or inner sheets through the gaps in the fiber material to the surface of the outer and / or inner sheets), sticking to the hot pressing unit or ultrasonic heat sealing unit. This requires regular cleaning of the hot pressing unit or ultrasonic heat sealing unit, affecting its service life. Utility Model Content

[0007] This invention provides a manufacturing apparatus for elastic composite sheets to solve the technical problem in the prior art where, when a hot pressing unit or an ultrasonic heat sealing unit joins an outer continuous sheet and an inner continuous sheet to form multiple spaced joints, the outer continuous sheet and / or the inner continuous sheet experience adhesive seepage into the elastic line adhesive and fixing adhesive, thereby affecting the service life of the hot pressing unit or the ultrasonic heat sealing unit.

[0008] The technical solution provided by this utility model is as follows:

[0009] One objective of this utility model is to provide a manufacturing apparatus for elastic composite sheets, the manufacturing apparatus comprising: a fixing adhesive application device, an auxiliary adhesive application device, a clamping unit, and a composite unit;

[0010] The fixing adhesive application device is arranged at the first application point on the transport path of the outer sheet continuous and / or the transport path of the inner sheet continuous, and is used to intermittently apply fixing adhesive to the surface of the outer sheet continuous and / or the inner sheet continuous.

[0011] The auxiliary adhesive application device is arranged at the second application point on the conveying path of the elastic thread continuum, and is used to spray elastic thread adhesive onto the outer periphery of multiple elastic thread continuums; wherein, the dosage of elastic thread adhesive is 0.0015~0.015g / m / thread;

[0012] The clamping unit is located downstream of the fixing adhesive application device and the auxiliary adhesive application device, and the composite unit is located downstream of the clamping unit;

[0013] The clamping unit includes a first composite point. The clamping unit combines the inner sheet continuous, multiple elastic line continuous and outer sheet continuous at the first composite point, so that the multiple elastic line continuous are fixed between the outer sheet continuous and the inner sheet continuous to form an elastic composite sheet semi-finished product.

[0014] The composite unit includes a second composite point, at which the inner and outer continuous sheets of the elastic composite sheet semi-finished product are joined together to form an array of multiple joints.

[0015] The distance between the first adhesive application point and the first composite point is greater than the distance between the second adhesive application point and the first composite point, and the distance between the first composite point and the second composite point is greater than the distance between the first adhesive application point and the first composite point.

[0016] In a preferred embodiment, the open time of the fixing adhesive intermittently applied to the surface of the outer sheet continuum and / or the inner sheet continuum is 0.4 to 0.7 s, and the operating temperature is 130 to 160 °C.

[0017] The open time of the elastic adhesive continuously sprayed on the outer periphery of the multi-elastic continuum is 0.1 to 0.3 seconds, and the operating temperature is 150 to 180°C.

[0018] In a preferred embodiment, the elastic thread adhesive is wrapped around the outer periphery of the elastic thread continuum in a winding manner; in the elastic composite sheet semi-finished product, the elastic thread adhesive and the fixing adhesive have overlapping portions, or the elastic thread adhesive and the fixing adhesive are disposed separately.

[0019] In a preferred embodiment, the clamping unit includes a first clamping roller and a second clamping roller disposed opposite to each other; the outer peripheral surfaces of the first clamping roller and the second clamping roller are tangentially fitted to form the first composite point;

[0020] The composite unit is an ultrasonic heat sealing unit, which includes a bottom roller and an ultrasonic welding head; the second composite point is formed between the bottom roller and the ultrasonic welding head;

[0021] Wherein, the first clamping roller and / or the second clamping roller are cooling rollers to accelerate the cooling and curing of the fixing adhesive intermittently applied to the surface of the outer sheet continuous and / or the inner sheet continuous.

[0022] In a preferred embodiment, the clamping unit includes a first clamping roller and a second clamping roller disposed opposite to each other; the outer peripheral surfaces of the first clamping roller and the second clamping roller are tangentially fitted to form a first composite point;

[0023] The composite unit is an ultrasonic heat sealing unit, which includes a bottom roller and an ultrasonic welding head; a second composite point is formed between the bottom roller and the ultrasonic welding head;

[0024] A cooling unit, which is a cooling roller, is arranged between the clamping unit and the composite unit to accelerate the cooling and curing of the fixing adhesive intermittently applied to the surface of the outer sheet continuous and / or the inner sheet continuous.

[0025] In a preferred embodiment, the circumferential surface of the bottom roller has a plurality of first protrusions forming a joint, the plurality of first protrusions being spaced apart along the circumferential direction of the bottom roller and arranged in a straight line, oblique line or curved line along the axial direction of the bottom roller.

[0026] In a preferred embodiment, the clamping unit includes a first clamping roller and a second clamping roller disposed opposite to each other; the outer peripheral surfaces of the first clamping roller and the second clamping roller are tangentially fitted to form a first composite point;

[0027] The composite unit is a hot pressing unit, which includes an anvil roller and a pressure roller arranged opposite to each other; the outer peripheral surfaces of the anvil roller and the pressure roller are tangentially bonded to form a second composite point.

[0028] In a preferred embodiment, the outer periphery of the pressure roller is provided with a plurality of second protrusions forming the joint portion. The plurality of second protrusions are arranged at intervals along the circumferential direction of the pressure roller and are arranged in a straight line, oblique line or curved line along the axial direction of the pressure roller.

[0029] In a preferred embodiment, the cooling roller has a fluid for cooling the adhesive inside, or is equipped with a temperature control system, or has a heat dissipation and suction channel designed inside.

[0030] The above-described technical solution of this utility model has at least the following beneficial effects compared with the prior art:

[0031] This invention provides a manufacturing apparatus for an elastic composite sheet. An auxiliary adhesive application device is arranged at the second adhesive application point on the conveying path of the elastic linear continuum. An elastic linear adhesive is continuously sprayed onto the outer periphery of multiple elastic linear continuums at a dosage of 0.0015–0.015 g / m / strand. A clamping unit combines the inner layer sheet continuum, multiple elastic linear continuums, and the outer layer sheet continuum at the first composite point, thus fixing the multiple elastic linear continuums between the outer and inner layer sheet continuums to form a semi-finished elastic composite sheet. When the composite unit joins the inner and outer layer sheet continuums of the semi-finished elastic composite sheet at the second composite point to form multiple joints in an array, the multiple elastic linear continuums, being fixed between the outer and inner layer sheet continuums, cannot move freely or intersect within the joint area between them, reducing the risk of breaking the elastic linear continuums during ultrasonic or hot pressing processes.

[0032] This invention provides a manufacturing apparatus for an elastic composite sheet. Multiple elastic threads sandwiched between an outer and inner sheet contract laterally, causing both the outer and inner sheets to contract and form regular accordion pleats between multiple spaced joints. Because the amount of adhesive used for the elastic threads is 0.0015–0.015 g / m / thread, the adhesive covering the outer periphery of the multiple elastic threads does not affect the formation of regular accordion pleats between the outer and inner sheets.

[0033] This invention provides a manufacturing apparatus for elastic composite sheets. The distance between the first adhesive application point and the first composite point is greater than the distance between the second adhesive application point and the first composite point, and the distance between the first composite point and the second composite point is also greater than the distance between the first adhesive application point and the first composite point. By extending the distance between the first composite point and the second composite point, the cooling and curing time of the elastic linear adhesive and the fixing adhesive is increased, thereby improving the curing effect of the elastic linear adhesive and the fixing adhesive after bonding in the clamping unit. This prevents the elastic linear adhesive and the fixing adhesive from seeping into the composite unit, the outer layer sheet continuity, and / or the inner layer sheet continuity, and improves the service life of the hot pressing unit and the ultrasonic heat sealing unit.

[0034] This utility model provides a manufacturing apparatus for elastic composite sheets. The first clamping roller and / or the second clamping roller are cooling rollers, or a cooling unit is arranged downstream of the clamping unit. The cooling unit is a cooling roller to accelerate the cooling and curing of the elastic linear adhesive and the fixing adhesive, prevent the elastic linear adhesive and the fixing adhesive from seeping into the composite unit, the outer sheet continuity and / or the inner sheet continuity, and improve the service life of the ultrasonic heat sealing unit. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a partial schematic diagram of the elastic composite sheet manufactured according to this utility model.

[0037] Figure 2 yes Figure 1 Cross-sectional view in the UU direction.

[0038] Figure 3 yes Figure 1 Cross-sectional view in the WW direction.

[0039] Figure 4This is a process flow diagram of a method for manufacturing an elastic composite sheet in Embodiment 1 of this utility model.

[0040] Figure 5 This is a cross-sectional view of the semi-finished elastic composite sheet of this utility model.

[0041] Figure 6 This is a schematic diagram of the ultrasonic heat sealing unit of this utility model.

[0042] Figure 7 This is a schematic diagram of an embodiment of the present invention where an elastic composite sheet is applied to a shorts-type garment.

[0043] Figure 8 This is a schematic diagram of an elastic composite sheet applied to an adhesive-type wearable item in another embodiment of the present invention.

[0044] Figure 9 This is a process flow diagram of a method for manufacturing an elastic composite sheet in Embodiment 2 of this utility model.

[0045] Figure 10 This is a process flow diagram of a method for manufacturing an elastic composite sheet in Embodiment 3 of this utility model. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0047] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0048] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0049] To make this utility model clearer, it is necessary to describe the elastic composite sheet manufactured according to this utility model. (In conjunction with...) Figures 1 to 3 The elastic composite sheet 20 has mutually perpendicular transverse, longitudinal, and thickness directions. The transverse direction of the elastic composite sheet 20 corresponds to the flow direction of the manufacturing method of the elastic composite sheet 20, which will be described in detail below.

[0050] Combination Figures 1 to 3 Along the thickness direction, the elastic composite sheet 20 includes an outer sheet 21 and an inner sheet 22; multiple elastic lines 23 extending laterally are arranged between the outer sheet 21 and the inner sheet 22.

[0051] Along the transverse direction, the elastic composite sheet 20 also includes multiple spaced-apart fixing areas C1. In the fixing areas C1, multiple elastic wires 23 are fixed between the outer sheet 21 and the inner sheet 22. Figure 1 As shown, this embodiment exemplarily provides two fixed regions C1. In some embodiments, there may be more fixed regions C1.

[0052] Furthermore, in the fixing area C1, multiple elastic wires 23 are fixed between the outer sheet 11 and the inner sheet 12 by a fixing adhesive G2, such as... Figure 2 and Figure 3 As shown. It should be noted that in the fixing area C1, the fixing adhesive G2 can be applied to multiple elastic threads 23, or to the inner surface of the outer sheet 21 and / or the inner sheet 22; if the fixing adhesive G2 is applied to multiple elastic threads 23, the basis weight of the fixing adhesive G2 is 5–20 g / m / thread; if the fixing adhesive G2 is applied to the inner surface of the outer sheet 21 and / or the inner sheet 22, the basis weight of the fixing adhesive G2 is 5–20 g / m. 2 The weight of the adhesive G2 is sufficient to stably fix the elastic line 23. Therefore, the elastic line 23 is completely fixed between the outer sheet 21 and the inner sheet 22 in the fixing area C1.

[0053] like Figure 1As shown, the outer sheet 21 and the inner sheet 22 are joined together by an array of multiple joints 40. There is at least one row of joints 40 between any two adjacent elastic threads 23 along the longitudinal direction, and the joints 40 and the multiple elastic threads 23 are arranged in a staggered manner along the longitudinal direction. When the multiple elastic threads 23 contract laterally, they cause the outer sheet 21 and the inner sheet 22 to contract, forming regular accordion pleats between the multiple spaced joints 40.

[0054] In the prior art, in order to form regular accordion pleats between the outer sheet 21 and the inner sheet 22 at multiple intervals of joint 40, during the process of joining the outer sheet 21 and the inner sheet 22 together by a hot pressing unit or an ultrasonic heat sealing unit to form multiple intervals of joint 40, multiple elastic wires 23 are in a free state outside the fixed area C1. However, when multiple elastic wires 23 are in a free state outside the fixed area C1, during the process of joining the outer sheet 21 and the inner sheet 22 together by a hot pressing unit or an ultrasonic heat sealing unit to form multiple intervals of joint 40, the elastic wires 23 are prone to shifting between each other in the area where the joint 40 is formed between the outer sheet 21 and the inner sheet 22, and the elastic wires 23 are easily crushed.

[0055] Furthermore, during the process of forming multiple spaced joints 40 by joining the hot pressing unit or the ultrasonic heat sealing unit, adhesive G2 is prone to seep into the outer sheet 21 and inner sheet 22 in the fixing area C1 (adhesive G2 penetrates from the interior of the outer sheet 21 and / or the inner sheet 22 through the gaps in the fiber material to the surface of the outer sheet 21 and / or the inner sheet 22), sticking to the hot pressing unit or the ultrasonic heat sealing unit, affecting the service life of the hot pressing unit or the ultrasonic heat sealing unit.

[0056] To address the aforementioned technical problems encountered during the process of joining the outer sheet 21 and the inner sheet 22 together to form multiple spaced joints 40 via a hot-pressing unit or an ultrasonic heat-sealing unit, this invention provides a method where multiple elastic threads 23 are continuously coated with an elastic thread adhesive G1 around their periphery. This allows the multiple elastic threads 23 to be auxiliaryly fixed between the outer sheet 21 and the inner sheet 22 in areas other than the fixing area C1. The dosage of the elastic thread adhesive G1 is 0.0015–0.015 g / m / thread, and the dosage of the elastic thread adhesive G1 increases with the increase of the linear density of a single elastic thread 13.

[0057] The longitudinal spacing between two adjacent elastic threads 23 is 2–12 mm, and the linear density of the elastic threads 23 is related to the longitudinal spacing by 50–250 dtex / mm. That is, for every 1 mm increase in the longitudinal spacing between two adjacent elastic threads 23, the linear density of the multiple elastic threads 13 increases by 50–250 dtex. By using the above-mentioned linear density specification of the multiple elastic threads 23 in relation to the longitudinal spacing, a better shrinkage effect of the elastic composite sheet 10 can be achieved, and the accordion pleat effect of the elastic composite sheet 10 can be optimized.

[0058] When the outer sheet 21 and the inner sheet 22 are joined together to form multiple spaced joints 40, multiple elastic wires 23 are fixed between the outer sheet 21 and the inner sheet 22. The multiple elastic wires 23 in the area where the joints 40 are formed between the outer sheet 21 and the inner sheet 22 cannot move freely or move around, reducing the risk of breaking the elastic wires 23 during ultrasonic or hot pressing.

[0059] If the amount of elastic adhesive G1 continuously wrapped around the periphery of the multiple elastic threads 23 is too small (e.g., less than 0.0015 g / m / thread), the multiple elastic threads 23 cannot be stably fixed between the outer sheet 21 and the inner sheet 22 in areas outside the fixing area C1. There is still a risk of the multiple elastic threads 23 shifting or moving freely in the area where the joint 40 is formed between the outer sheet 21 and the inner sheet 22. If the amount of elastic adhesive G1 continuously wrapped around the periphery of the multiple elastic threads 23 is too large (e.g., greater than 0.015 g / m / thread), the outer sheet 21 and the inner sheet 22 may adhere to each other in areas outside the fixing area C1. This results in irregular and unsightly accordion folds formed between the multiple spaced joints 40 of the outer sheet 21 and the inner sheet 22.

[0060] The dosage of the elastic thread adhesive G1 of this utility model is 0.0015~0.015g / m / thread. In the area outside the fixing area C1, multiple elastic threads 23 can stably assist in fixing between the outer sheet 21 and the inner sheet 22.

[0061] The auxiliary fixation here is not like that in the fixation area C1 mentioned above, where the elastic wires 23 are completely fixed between the outer sheet 21 and the inner sheet 22. Instead, it only serves a micro-fixation purpose. The purpose is to prevent the multiple elastic wires 23 from moving around or moving freely in the area where the joints 40 are formed between the outer sheet 21 and the inner sheet 22 during the process of joining the outer sheet 21 and the inner sheet 22 to form multiple spaced joints 40. This avoids breaking the elastic wires 23. At the same time, the elastic wire adhesive G1 covering the outer periphery of the multiple elastic wires 23 will not affect the formation of regular and beautiful accordion pleats between the outer sheet 21 and the inner sheet 22.

[0062] Combination Figures 4 to 6 In order to prepare the elastic composite sheet 20 of the present invention, according to an embodiment of the present invention, an apparatus for manufacturing the elastic composite sheet is provided, comprising: a fixing adhesive application device H2, an auxiliary adhesive application device H1, a clamping unit M, and a composite unit.

[0063] The adhesive application device H2 is arranged at the first application point a1 on the transport path of the outer sheet continuous 21C and / or the transport path of the inner sheet continuous 22C, and is used to intermittently apply the adhesive G2 to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C.

[0064] like Figure 4 As shown, in this embodiment, a first adhesive application point a1 is provided on the transport path of the outer layer sheet continuous body 21C, and a fixing adhesive application device H2 is arranged at the first adhesive application point a1 on the transport path of the outer layer sheet continuous body 21C.

[0065] In some embodiments, a first adhesive application point a1 is provided on the transport path of the inner layer sheet continuous 22C, and a fixed adhesive application device H2 is arranged at the first adhesive application point a1 on the transport path of the inner layer sheet continuous 22C.

[0066] In other embodiments, a first adhesive application point a1 is provided on both the transport path of the outer sheet continuous 21C and the transport path of the inner sheet continuous 22C, and a fixing adhesive application device H2 is arranged at the first adhesive application point a1 on both the transport path of the outer sheet continuous 21C and the transport path of the inner sheet continuous 22C.

[0067] The outer sheet continuous 21C and inner sheet continuous 22C of this utility model refer to the continuous sheet after unwinding, which respectively correspond to the outer sheet 21 and inner sheet 22 of the elastic composite sheet 20.

[0068] The adhesive application device H2 includes an adhesive application device body H20 and a second nozzle H21. Through the second nozzle H21, the adhesive G2 is intermittently applied to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C at the first application point a1.

[0069] In this invention, the second nozzle H21 intermittently applies a fixing adhesive G2 to the surface of the outer layer continuous body 21C and / or the inner layer continuous body 22C by scraping or spraying. The nozzle used for scraping is also called a contact nozzle, meaning the second nozzle H21 is in zero-distance contact with the outer periphery of the multiple elastic line continuous bodies 23C, such as a trough coating machine. The nozzle used for spraying is also called a non-contact nozzle, meaning there is a predetermined distance between the second nozzle H21 and the multiple elastic line continuous bodies 23C. A non-contact nozzle is, for example, the Signature brand from Nordson Corporation. TM(Random Fiber Adhesive Type), Summit TM (Small spiral adhesive type), CF TM (Large spiral type), Control Coat TM (Regular spray adhesive type) nozzle).

[0070] An auxiliary adhesive application device H1 is arranged at the second adhesive application point a2 on the conveying path of the elastic thread continuum 23C. It is used to continuously spray the elastic thread adhesive G1 onto the outer periphery of multiple elastic thread continuums 23C. The dosage of the elastic thread adhesive G1 is 0.0015~0.015 g / m / thread.

[0071] Specifically, a second adhesive application point a2 is set on the conveying path of the elastic linear continuum 23C, and an auxiliary adhesive application device H1 is arranged at the second adhesive application point a2 on the conveying path of the elastic linear continuum 23C.

[0072] The elastic thread continuum 23C of this utility model refers to an elastic thread that is continuously stretched after unwinding, corresponding to the elastic thread 23 of the prepared elastic composite sheet 20. Preferably, the linear density of the multiple elastic thread continuum 23C is 140-780 dtex.

[0073] The auxiliary adhesive application device H1 includes an auxiliary adhesive application device body H10 and a first nozzle H11. Through the first nozzle H11, elastic line adhesive G1 is continuously sprayed onto the outer periphery of the multiple elastic line continuum 23C at the second application point a2.

[0074] In this invention, the first nozzle H11 applies the elastic thread adhesive G1 to the outer periphery of the multiple elastic thread continuum 23C by spraying or scraping. The nozzle for spraying or scraping can be a contact nozzle, such as Surewrap, commercially available from Nordson Corporation. TM (Rubber band spraying) nozzle, and Allegro TM (Rubber band scraping), or spraying can be performed using a non-contact nozzle such as an Ω nozzle commercially available from I TW Dynatec. In this embodiment, an Ω nozzle is preferred, and the dosage that can be applied is in the range of 0.0015 to 0.015 g / m / root.

[0075] Specifically, the elastic thread adhesive G1 wraps around the periphery of the elastic thread continuum 23C in a wrapping manner.

[0076] The open time of the fixing adhesive G2 intermittently applied to the surfaces of the outer sheet continuous 21C and / or the inner sheet continuous 22C is 0.4–0.7 s, and the operating temperature is 130–160 °C. The open time of the elastic wire adhesive G1 sprayed on the periphery of the multi-elastic wire continuous 23C is 0.1–0.3 s, and the operating temperature is 150–180 °C.

[0077] Open time refers to the time during which the adhesive (elastic line adhesive G1, fixed adhesive G2) maintains its tackiness during the application and curing process, that is, the time during which the adhesive has the most effective bonding strength.

[0078] The clamping unit M is located downstream of the fixed adhesive application device H2 and the auxiliary adhesive application device H1. The clamping unit M includes a first composite point a3, at which the clamping unit M combines the inner sheet continuous 22C, the multiple elastic thread continuous 23C and the outer sheet continuous 21C, so that the multiple elastic thread continuous 23C is auxiliaryly fixed between the outer sheet continuous 21C and the inner sheet continuous 22C, forming an elastic composite sheet semi-finished product 20S.

[0079] The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3, i.e., P2 > P1.

[0080] In this embodiment, the clamping unit M includes a first clamping roller M1 and a second clamping roller M2 disposed opposite to each other. The outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 are tangentially attached to form a first composite point a3.

[0081] In this embodiment, the first clamping roller M1 or the second clamping roller M2 is driven to rotate by a motor (not shown in the figure) or other driving device. The outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C are simultaneously rotated by the outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 clamping each other. At the first composite point a3, the inner layer sheet continuous body 22C, the multiple elastic thread continuous bodies 23C, and the outer layer sheet continuous body 21C are composited together. This causes the multiple elastic thread continuous bodies 23C to be auxiliaryly fixed between the outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C in an area outside the fixed area C1, while the multiple elastic thread continuous bodies 23C are fixed between the outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C in the fixed area C1, forming an elastic composite sheet semi-finished product 20S. In the fixed area C1, in the elastic composite sheet semi-finished product 20S, the elastic thread adhesive G1 overlaps with the fixing adhesive G1, or the elastic thread adhesive G1 and the fixing adhesive G1 are set to avoid each other, such as... Figure 3 and 5 As shown.

[0082] In this embodiment, the first clamping roller M1 and / or the second clamping roller M2 are cooling rollers to accelerate the cooling and curing of the fixing adhesive G2 intermittently applied to the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, and the elastic thread adhesive G1 covering the outer periphery of the multiple elastic thread continuous 23C.

[0083] In some embodiments, the first clamping roller M1 is a cooling roller. In other embodiments, the second clamping roller M2 is a cooling roller. In still other embodiments, both the first clamping roller M1 and the second clamping roller M2 are cooling rollers.

[0084] A cooling roller refers to a roller with a fluid (such as water circulation cooling) inside for cooling the adhesive, or with a temperature control system installed inside, or with a heat dissipation and suction channel designed inside, thereby accelerating the cooling and curing of the intermittently applied fixing adhesive G2 on the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C, and the elastic line adhesive G1 covering the periphery of the multiple elastic line continuous 23C.

[0085] The composite unit is located downstream of the clamping unit M. The composite unit includes a second composite point a4, at which the inner layer continuous 22C and the outer layer continuous 21C of the elastic composite sheet semi-finished product 20S are joined together to form an array of multiple joints 40.

[0086] Combination Figure 4 and Figure 6 In this embodiment, the composite unit is an ultrasonic heat sealing unit N. The ultrasonic heat sealing unit N includes a bottom roller N1 and an ultrasonic welding head N2 arranged opposite to each other. A second composite point a4 is formed between the bottom roller N1 and the ultrasonic welding head N2. The bottom roller N1 has a plurality of first protrusions N11 forming a joint 40 on its circumferential surface. The plurality of first protrusions N11 are arranged at intervals along the circumferential direction of the bottom roller N1 and are arranged in a straight line, oblique line or curved line along the axial direction of the bottom roller N1.

[0087] The distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1.

[0088] The elastic composite sheet semi-finished product 20S is conveyed along the flow direction to the second composite point a4. The ultrasonic heat sealing unit N joins the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S to form an array of multiple joints 40, and forms the elastic composite sheet 20.

[0089] Specifically, the semi-finished elastic composite sheet 20S is conveyed between the bottom roller N1 and the ultrasonic welding head N2. At the second composite point a4, the ultrasonic welding head H2 imparts ultrasonic vibration energy, causing the inner layer sheet continuous 22C and the outer layer sheet continuous 21C to fuse together on multiple first protrusions N11 to form an array of multiple joints 40, thus forming the elastic composite sheet 20. The elastic composite sheet 20 has at least one row of joints 40 between two adjacent elastic lines 23 along the longitudinal direction. The joints 40 and the multiple elastic lines 23 are arranged in a staggered manner along the longitudinal direction, such as... Figures 1 to 3 As shown.

[0090] In this embodiment, a guide roller D' is arranged between the clamping unit M and the ultrasonic heat sealing unit N. The distance between the first composite point a3 and the guide roller D' is L1, and the distance between the guide roller D' and the second composite point a4 is L2. The distance L between the first composite point a3 and the second composite point a4 is equal to the sum of the distance L1 between the first composite point a3 and the guide roller D' and the distance L2 between the guide roller D' and the second composite point a4, i.e., L = L1 + L2.

[0091] In some embodiments, the guide roller D' may not be provided.

[0092] The auxiliary adhesive application device H1 of this invention is arranged at the second adhesive application point a2 on the conveying path of the elastic thread continuous body 23C. It continuously sprays elastic thread adhesive G1 onto the outer periphery of multiple elastic thread continuous bodies 23C, with a dosage of 0.0015–0.015 g / m / thread. In the clamping unit M, the multiple elastic thread continuous bodies 23C are assisted in being fixed between the outer layer continuous body 21C and the inner layer continuous body 22C in the area outside the fixed area C1, forming an elastic composite sheet. In the semi-finished product 20S, when the outer layer continuous body 21C and the inner layer continuous body 22C of the composite unit are joined together to form multiple spaced joints 40, multiple elastic wire continuous bodies 23C are auxiliaryly fixed between the outer layer continuous body 21C and the inner layer continuous body 22C. In the area where the multiple elastic wire continuous bodies 23C form the joints 40 between the outer layer continuous body 21C and the inner layer continuous body 22C, they cannot move freely or intersect, reducing the risk of breaking the elastic wire continuous bodies 23C. This is especially true for finer elastic wire continuous bodies 23C, such as those with a linear density of 140–780 dtex.

[0093] The dosage of the elastic wire adhesive G1 in this invention is very small, only 0.0015~0.015 g / m / wire. The open time of the elastic wire adhesive G1 is shorter than that of the fixing adhesive G2, and the operating temperature of the elastic wire adhesive G1 is higher than that of the fixing adhesive G2. This allows the clamping unit M to quickly and effectively fix multiple elastic wire continuums 23C between the outer sheet continuum 21C and the inner sheet continuum 22C in areas other than the fixing area C1 using the elastic wire adhesive G1. In the fixing area C1, the fixing adhesive G2 stably fixes multiple elastic wire continuums 23C between the outer sheet continuum 21C and the inner sheet continuum 22C, ensuring the bonding effect of the elastic wire adhesive G1 and the fixing adhesive G2 in the clamping unit M.

[0094] The dosage of the elastic thread adhesive G1 in this invention is very small, only 0.0015~0.015g / m / thread. The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3 (P2>P1), thereby ensuring the curing effect of the elastic thread adhesive G1 and the fixing adhesive G2 after bonding in the clamping unit M. This prevents the elastic thread adhesive G1 and the fixing adhesive G2 from seeping into the composite unit, the outer sheet continuous body 21C and / or the inner sheet continuous body 22C (the elastic thread adhesive G1 and the fixing adhesive G2 penetrate from the interior of the outer sheet continuous body 21C and / or the inner sheet continuous body 22C through the gaps in the fiber material to the surface of the outer sheet continuous body 21C and / or the inner sheet continuous body 22C), thus improving the service life of the ultrasonic heat sealing unit N.

[0095] In this embodiment, the first clamping roller M1 and / or the second clamping roller M2 are cooling rollers, which further accelerate the cooling and curing of the intermittently applied fixing adhesive G2 on the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, as well as the elastic line adhesive G1 covering the outer periphery of the multiple elastic line continuous 23C. This prevents the elastic line adhesive G1 and fixing adhesive G2 from seeping into the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C in the conforming unit, thereby improving the service life of the ultrasonic heat sealing unit N.

[0096] The distance P2 between the first adhesive application point a1 and the first composite point a3 is greater than the distance P1 between the second adhesive application point a2 and the first composite point a3, and the distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1. By extending the distance L between the first composite point a3 and the second composite point a4, the cooling and curing time of the elastic line adhesive G1 and the fixing adhesive G2 is increased, thereby improving the curing effect of the elastic line adhesive G1 and the fixing adhesive G2 after bonding in the clamping unit M, preventing the elastic line adhesive G1 and the fixing adhesive G2 from seeping into the composite unit, the outer sheet continuous body 21C and / or the inner sheet continuous body 22C, and improving the service life of the ultrasonic heat sealing unit N.

[0097] Combination Figures 4 to 8 According to an embodiment of the present invention, a method for manufacturing an elastic composite sheet is provided, comprising:

[0098] The outer layer sheet continuous feeding process S1 is used to continuously convey the outer layer sheet continuous 21C along the flow direction to the clamping process S4.

[0099] Specifically, the outer sheet continuous body 21C is continuously conveyed to the clamping process S4 along the flow direction under the action of multiple free rollers D.

[0100] The inner layer sheet continuous feeding process S2 is used to continuously convey the inner layer sheet continuous 22C along the flow direction to the clamping process S4.

[0101] Specifically, the inner layer sheet continuous 22C is continuously conveyed to the clamping process S4 along the flow direction under the action of multiple free rollers D.

[0102] According to an embodiment of the present invention, a first adhesive application point a1 is provided on the transport path of the outer sheet continuous 21C and / or the transport path of the inner sheet continuous 22C, and a fixing adhesive G2 is intermittently applied to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C at the first adhesive application point a1.

[0103] like Figure 4 As shown, in this embodiment, a first adhesive application point a1 is set on the transport path of the outer layer sheet continuous 21C.

[0104] Furthermore, a fixing adhesive application device H2 is provided at the first application point, and the fixing adhesive application device H2 is located on the transport path of the outer layer continuous body 21C and / or the transport path of the inner layer continuous body 22C. The fixing adhesive application device H2 intermittently applies fixing adhesive G2 to the surface of the outer layer continuous body 21C and / or the inner layer continuous body 22C at the first application point a1.

[0105] The adhesive application device H2 includes an adhesive application device body H20 and a second nozzle H21. Through the second nozzle H21, the adhesive G2 is intermittently applied to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C at the first application point a1.

[0106] The fixing adhesive G2 is applied to the fixing area C1 of the elastic composite sheet 20, and there is a preset distance between adjacent fixing areas C1. The fixing adhesive G2 is applied to the fixing area C1 of the elastic composite sheet 20 by setting the intermittent time of the fixing adhesive application device H2 and the conveying speed of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C.

[0107] The elastic wire continuous body supply process S3 is used to continuously transport multiple elastic wire continuous bodies 23C along the flow direction to the clamping process S4.

[0108] Specifically, multiple elastic continuous lines 23C are continuously conveyed to the clamping process S4 along the flow direction under the action of multiple free rollers D.

[0109] According to an embodiment of the present invention, a second adhesive application point a2 is provided on the conveying path of the elastic thread continuum 23C, and elastic thread adhesive G1 is continuously sprayed onto the outer periphery of multiple elastic thread continuums 23C at the second adhesive application point a2; wherein, the dosage of elastic thread adhesive G1 is 0.0015~0.015g / m / thread.

[0110] Furthermore, an auxiliary adhesive application device H1 is provided at the second adhesive application point a2, and the auxiliary adhesive application device H1 is located on the transport path of the elastic thread continuum 23C. The auxiliary adhesive application device H1 continuously sprays the elastic thread adhesive G1 onto the outer periphery of the multiple elastic thread continuums 23C at the second adhesive application point a2. Specifically, the elastic thread adhesive G1 wraps the outer periphery of the elastic thread continuum 23C in a winding manner.

[0111] The auxiliary adhesive application device H1 includes an auxiliary adhesive application device body H10 and a first nozzle H11. Through the first nozzle H11, elastic line adhesive G1 is sprayed onto the outer periphery of the multiple elastic line continuous body 23C at the second application point a2.

[0112] According to an embodiment of the present invention, the open time of the fixing adhesive G2 intermittently applied to the surfaces of the outer sheet continuous 21C and / or the inner sheet continuous 22C is 0.4–0.7 s, and the operating temperature is 130–160 °C. The open time of the elastic thread adhesive G1 sprayed on the outer periphery of the multiple elastic thread continuous 23C is 0.1–0.3 s, and the operating temperature is 150–180 °C.

[0113] The clamping process S4 is used to combine the inner sheet continuous 22C, the multiple elastic line continuous 23C and the outer sheet continuous 21C at the first composite point a3, so that the multiple elastic line continuous 23C is fixed between the outer sheet continuous 21C and the inner sheet continuous 22C to form an elastic composite sheet semi-finished product 20S.

[0114] In this embodiment, the clamping process S4 includes a clamping unit M. The clamping unit M includes a first clamping roller M1 and a second clamping roller M2 arranged opposite to each other. The outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 are tangentially attached to form a first composite point a3.

[0115] According to an embodiment of the present invention, the distance P2 between the first adhesive application point a1 and the first composite point a3 is greater than the distance P1 between the second adhesive application point a2 and the first composite point a3, that is, P2 > P1.

[0116] In this embodiment, the first clamping roller M1 and / or the second clamping roller M2 are cooling rollers to accelerate the cooling and curing of the fixing adhesive G2 intermittently applied to the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, and the elastic thread adhesive G1 covering the outer periphery of the multiple elastic thread continuous 23C.

[0117] The composite process S5 is used to join the inner layer continuous 22C and the outer layer continuous 21C of the elastic composite sheet semi-finished product 20S to each other at the second composite point a4 to form an array of multiple joints 40.

[0118] In this embodiment, the composite process S5 includes an ultrasonic heat-sealing unit N. Combined with... Figure 4 and Figure 6 The ultrasonic heat sealing unit N includes a bottom roller N1 and an ultrasonic welding head N2 arranged opposite to each other. A second composite point a4 is formed between the bottom roller N1 and the ultrasonic welding head N2. The bottom roller N1 has a plurality of first protrusions N11 forming a joint 40 on its circumferential surface. The plurality of first protrusions N11 are arranged at intervals along the circumferential direction of the bottom roller N1 and are arranged in a straight line, oblique line or curved line along the axial direction of the bottom roller N1.

[0119] The elastic composite sheet semi-finished product 20S is conveyed along the flow direction to the second composite point a4. The ultrasonic heat sealing unit N joins the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S to form an array of multiple joints 40, and forms the elastic composite sheet 20.

[0120] According to an embodiment of the present invention, the distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1.

[0121] In this embodiment, a guide roller D' is arranged between the clamping unit M and the ultrasonic heat sealing unit N. The distance between the first composite point a3 and the guide roller D' is L1, and the distance between the guide roller D' and the second composite point a4 is L2. The distance L between the first composite point a3 and the second composite point a4 is equal to the sum of the distance L1 between the first composite point a3 and the guide roller D' and the distance L2 between the guide roller D' and the second composite point a4, i.e., L = L1 + L2.

[0122] In some embodiments, the guide roller D' may not be provided.

[0123] like Figure 7 As shown, in some embodiments, the elastic composite sheet 20 prepared according to this invention is applied to shorts-type clothing. The shorts-type clothing has a front waistband B1 located on the front waist side of the wearer, a back panel B2 on the back side of the wearer, and a crotch area B3 located between the front waistband and the back panel. The side edges of the front waistband B1 and the side edges of the back panel B2 are respectively sealed to form side closures 30, giving the shorts-type clothing a pant-like shape with one waist opening and two leg openings. An absorbent body 10 is provided in the crotch area B3, extending to the front waistband B1 and the back panel B2. The elastic composite sheet 20 prepared according to this invention is applied to the front waistband B1 and the back panel B2 of the shorts-type clothing.

[0124] like Figure 8As shown, in some embodiments, the elastic composite sheet 20 prepared by this invention is applied to adhesive-fit garments. The adhesive-fit garments have a front waist section B1 disposed on the wearer's front waist side, a back section B2 on the wearer's back side, and a crotch section B3 located between the front waist section and the back section. Left and right waist tabs 50 are respectively provided on both sides of the back section B2, and a front waist tab 60 is provided on the front waist section B1. When worn, the pair of left and right waist tabs 50 are respectively attached to the front waist tab 60 of the front waist section B1, so that the adhesive-fit garments are in a closed state, thereby forming a pant-like shape with one waist opening and two leg openings.

[0125] The elastic composite sheet 20 prepared by this invention is applied to the back B2 of adhesive-backed clothing, giving the back B2 a certain degree of elasticity. Additionally, a waist protection section 70 can be provided on the back B2 to further prevent leakage of bodily excrement; the waist protection section 70 can also be made of the elastic composite sheet 20 prepared by this invention.

[0126] Example 2.

[0127] The difference between this embodiment and Embodiment 1 is that neither the first clamping roller M1 nor the second clamping roller M2 of the clamping unit M are cooling rollers. A cooling unit K is arranged downstream of the clamping unit M. The cooling unit K is a cooling roller to accelerate the cooling and curing of the fixing adhesive G2 intermittently applied to the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, as well as the elastic thread adhesive G1 wrapped around the periphery of the multiple elastic thread continuous 23C.

[0128] Combination Figure 9 According to this utility model, this embodiment provides a manufacturing apparatus for an elastic composite sheet, comprising: a fixing adhesive application device H2, an auxiliary adhesive application device H1, a clamping unit M, and a composite unit.

[0129] The adhesive application device H2 is arranged at the first application point a1 on the transport path of the outer sheet continuous 21C and / or the transport path of the inner sheet continuous 22C, and is used to intermittently apply the adhesive G2 to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C.

[0130] An auxiliary adhesive application device H1 is arranged at the second adhesive application point a2 on the conveying path of the elastic thread continuum 23C. It is used to spray the elastic thread adhesive G1 onto the outer periphery of multiple elastic thread continuums 23C. The dosage of the elastic thread adhesive G1 is 0.0015~0.015 g / m / thread.

[0131] The open time of the fixing adhesive G2 intermittently applied to the surfaces of the outer sheet continuous 21C and / or the inner sheet continuous 22C is 0.4–0.7 s, and the operating temperature is 130–160 °C. The open time of the elastic wire adhesive G1 sprayed on the periphery of the multi-elastic wire continuous 23C is 0.1–0.3 s, and the operating temperature is 150–180 °C.

[0132] The clamping unit M includes a first composite point a3. The clamping unit M combines the inner sheet continuous 22C, the multiple elastic line continuous 23C and the outer sheet continuous 21C at the first composite point, so that the multiple elastic line continuous 23C is fixed between the outer sheet continuous 21C and the inner sheet continuous 22C to form an elastic composite sheet semi-finished product 20S.

[0133] The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3, i.e., P2 > P1.

[0134] The clamping unit M includes a first clamping roller M1 and a second clamping roller M2 arranged opposite to each other. The outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 approach each other to form a first composite point a3.

[0135] In this embodiment, a cooling unit K is arranged between the clamping unit M and the composite unit. The cooling unit K is a cooling roller to accelerate the cooling and curing of the fixing adhesive G2 intermittently applied to the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, as well as the elastic thread adhesive G1 continuously wrapped around the periphery of the multiple elastic thread continuous 23C.

[0136] In this embodiment, the composite unit includes a second composite point a4. The composite unit is an ultrasonic heat sealing unit N. The ultrasonic heat sealing unit N includes a bottom roller N1 and an ultrasonic welding head N2 arranged opposite to each other. The second composite point a4 is formed between the bottom roller N1 and the ultrasonic welding head N2. At the second composite point a4, the inner layer sheet continuous 22C and the outer layer sheet continuous 21C of the elastic composite sheet semi-finished product 20S are joined together to form an array of multiple joints 40, and to form an elastic composite sheet 20.

[0137] The distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1.

[0138] In this embodiment, the distance between the first composite point a3 and the cooling unit K is D1, and the distance between the cooling unit K and the second composite point a4 is D2. The distance L between the first composite point a3 and the second composite point a4 is equal to the sum of the distance D1 between the first composite point a3 and the cooling unit K and the distance D2 between the cooling unit K and the second composite point a4, that is, L = D1 + D2.

[0139] In this embodiment, the dosage of elastic thread adhesive G1 is very small, only 0.0015~0.015 g / m / thread. The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3 (P2>P1), thereby ensuring the curing effect of elastic thread adhesive G1 and fixing adhesive G2 after bonding in the clamping process S4, preventing the elastic thread adhesive G1 and fixing adhesive G2 from seeping into the outer layer sheet continuous body 21C and / or the inner layer sheet continuous body 22C in the composite process S5, and improving the service life of the hot pressing unit N'.

[0140] In this embodiment, a cooling unit K is arranged downstream of the clamping unit M. The cooling unit K is a cooling roller, which further accelerates the cooling and curing of the fixing adhesive G2 intermittently applied to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C, as well as the elastic line adhesive G1 wrapped around the periphery of the multiple elastic line continuous 23C. This prevents the elastic line adhesive G1 and fixing adhesive G2 from seeping into the composite unit, the outer sheet continuous 21C and / or the inner sheet continuous 22C, and improves the service life of the ultrasonic heat sealing unit N.

[0141] In this embodiment, the distance P2 between the first adhesive application point a1 and the first composite point a3 is greater than the distance P1 between the second adhesive application point a2 and the first composite point a3, and the distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1. By extending the distance L between the first composite point a3 and the second composite point a4, the cooling and curing time of the elastic line adhesive G1 and the fixing adhesive G2 is increased, thereby improving the curing effect of the elastic line adhesive G1 and the fixing adhesive G2 after bonding in the clamping process S4, preventing the elastic line adhesive G1 and the fixing adhesive G2 from seeping into the outer layer sheet continuous body 21C and / or the inner layer sheet continuous body 22C in the composite process S5, and improving the service life of the hot pressing unit N'.

[0142] In this embodiment, since neither the first clamping roller M1 nor the second clamping roller M2 of the clamping unit M are cooling rollers, a cooling unit K is arranged downstream of the clamping process S4. The cooling unit K is a cooling roller, which accelerates the cooling and curing of the intermittently applied fixing adhesive G2 on the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, as well as the elastic thread adhesive G1 covering the outer periphery of the multiple elastic thread continuous 23C. Therefore, in this embodiment, the distance D2 between the cooling unit K and the second composite point a4 can be shorter than the distance L2 between the guide roller D' and the second composite point a4 in Embodiment 1, i.e., D2 < L2. Of course, it can also be longer, such as D2 > L2.

[0143] Combination Figure 9In this embodiment, a method for manufacturing an elastic composite sheet is provided, comprising:

[0144] The outer layer sheet continuous feeding process S1 is used to continuously convey the outer layer sheet continuous 21C along the flow direction to the clamping process S4.

[0145] The inner layer sheet continuous feeding process S2 is used to continuously convey the inner layer sheet continuous 22C along the flow direction to the clamping process S4.

[0146] A first adhesive application point a1 is provided on the transport path of the outer sheet continuous 21C and / or the transport path of the inner sheet continuous 22C, and a fixing adhesive G2 is intermittently applied to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C at the first adhesive application point a1.

[0147] The elastic wire continuous body supply process S3 is used to continuously transport multiple elastic wire continuous bodies 23C along the flow direction to the clamping process S4.

[0148] A second application point a2 is set on the conveying path of the elastic thread continuum 23C, and elastic thread adhesive G1 is continuously sprayed onto the outer periphery of multiple elastic thread continuums 23C at the second application point a2; wherein, the dosage of elastic thread adhesive G1 is 0.0015~0.015g / m / thread.

[0149] The open time of the fixing adhesive G2 intermittently applied to the surfaces of the outer sheet continuous 21C and / or the inner sheet continuous 22C is 0.4–0.7 s, and the operating temperature is 130–160 °C. The open time of the elastic wire adhesive G1 sprayed on the periphery of the multi-elastic wire continuous 23C is 0.1–0.3 s, and the operating temperature is 150–180 °C.

[0150] The clamping process S4 is used to combine the inner sheet continuous 22C, the multiple elastic line continuous 23C and the outer sheet continuous 21C at the first composite point a3, so that the multiple elastic line continuous 23C is fixed between the outer sheet continuous 21C and the inner sheet continuous 22C to form an elastic composite sheet semi-finished product 20S.

[0151] In this embodiment, the clamping process S4 includes a clamping unit M. The clamping unit M includes a first clamping roller M1 and a second clamping roller M2 arranged opposite to each other. The outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 approach each other to form a first composite point a3.

[0152] The first clamping roller M1 or the second clamping roller M2 is driven to rotate by a motor (not shown in the figure) or other driving device. The outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C are clamped together by the outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2, and rotated at the same time. At the first composite point a3, the inner layer sheet continuous body 22C, the multiple elastic thread continuous bodies 23C and the outer layer sheet continuous body 21C are composited together. The multiple elastic thread continuous bodies 23C are auxiliaryly fixed between the outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C in the area outside the fixed area C1. The multiple elastic thread continuous bodies 23C are stably fixed between the outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C in the fixed area C1, forming an elastic composite sheet semi-finished product 20S.

[0153] The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3, i.e., P2 > P1.

[0154] In this embodiment, a cooling unit K is arranged downstream of the clamping process S4. The cooling unit K is a cooling roller to accelerate the cooling and curing of the fixing adhesive G2 intermittently applied to the surface of the outer layer sheet continuous 21C and / or the inner layer sheet continuous 22C, as well as the elastic line adhesive G1 covering the outer periphery of the multiple elastic line continuous 23C.

[0155] The composite process S5 is used to join the inner layer sheet continuous 22C and the outer layer sheet continuous 21C of the elastic composite sheet semi-finished product 20S to form an array of multiple joints 40 at the second composite point a4, and to form the elastic composite sheet 20.

[0156] In this embodiment, the composite process S5 includes an ultrasonic heat sealing unit N. The ultrasonic heat sealing unit N includes a bottom roller N1 and an ultrasonic welding head N2 arranged opposite each other, with a second composite point a4 formed between the bottom roller N1 and the ultrasonic welding head N2.

[0157] The elastic composite sheet semi-finished product 20S is conveyed along the flow direction to the second composite point a4. The ultrasonic heat sealing unit N causes the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S to join together to form an array of multiple joints 40, and form the elastic composite sheet 20.

[0158] The distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1.

[0159] The processes and structures of the manufacturing apparatus for the other manufacturing methods in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0160] Example 3.

[0161] The difference between this embodiment and Embodiment 1 is that neither the first clamping roller M1 nor the second clamping roller M2 of the clamping unit M are cooling rollers, and the composite unit is a hot pressing unit N'.

[0162] Combination Figure 10 According to this utility model, this embodiment provides a manufacturing apparatus for an elastic composite sheet, comprising: a fixing adhesive application device H2, an auxiliary adhesive application device H1, a clamping unit M, and a composite unit.

[0163] The adhesive application device H2 is arranged at the first application point a1 on the transport path of the outer sheet continuous 21C and / or the transport path of the inner sheet continuous 22C, and is used to intermittently apply the adhesive G2 to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C.

[0164] An auxiliary adhesive application device H1 is arranged at the second adhesive application point a2 on the conveying path of the elastic thread continuum 23C. It is used to continuously spray the elastic thread adhesive G1 onto the outer periphery of multiple elastic thread continuums 23C. The dosage of the elastic thread adhesive G1 is 0.0015~0.015 g / m / thread.

[0165] The open time of the fixing adhesive G2 intermittently applied to the surfaces of the outer sheet continuous 21C and / or the inner sheet continuous 22C is 0.4–0.7 s, and the operating temperature is 130–160 °C. The open time of the elastic wire adhesive G1 sprayed on the periphery of the multi-elastic wire continuous 23C is 0.1–0.3 s, and the operating temperature is 150–180 °C.

[0166] The clamping unit M includes a first composite point a3. At the first composite point a3, the inner sheet continuous 22C, the multiple elastic line continuous 23C and the outer sheet continuous 21C are combined with each other, so that the multiple elastic line continuous 23C is fixed between the outer sheet continuous 21C and the inner sheet continuous 22C to form an elastic composite sheet semi-finished product 20S.

[0167] The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3, i.e., P2 > P1.

[0168] The clamping unit M includes a first clamping roller M1 and a second clamping roller M2 arranged opposite to each other. The outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 are tangentially attached to form a first composite point a3.

[0169] In this embodiment, the composite unit includes a second composite point a4, and the composite unit is a hot-pressing unit N', which includes an anvil roller N1' and a pressure roller N2' arranged opposite to each other. The outer peripheral surfaces of the anvil roller N1' and the pressure roller N2' are tangentially bonded to form the second composite point a4. At the second composite point a4, the inner layer continuous body 22C and the outer layer continuous body 21C of the elastic composite sheet semi-finished product 20S are joined together to form an array of multiple joint portions 40.

[0170] The outer periphery of the pressure roller N2' is provided with a plurality of second protrusions (not shown in the figure) forming a joint 40. The plurality of second protrusions are arranged at intervals along the circumferential direction of the pressure roller N2', and are arranged in a straight line, oblique line or curved line along the axial direction of the pressure roller N2'.

[0171] The elastic composite sheet semi-finished product 20S is conveyed along the flow direction to the second composite point a4. The hot pressing unit N' causes the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S to join together to form an array of multiple joints 40, and to form the elastic composite sheet 20.

[0172] Specifically, the anvil roller N1' and the pressure roller N2' are driven to rotate by a motor (not shown in the figure) or other driving device. The elastic composite sheet semi-finished product 20S is conveyed to the second composite point a4 along the flow direction. The outer peripheral surfaces of the anvil roller N1' and the pressure roller N2' clamp the elastic composite sheet semi-finished product 20S to each other, thereby applying local pressure and heating to the elastic composite sheet semi-finished product 20S. This causes the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S to join together to form an array of multiple joints 40, thus forming the elastic composite sheet 20.

[0173] The distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1.

[0174] In this embodiment, a guide roller D' is arranged between the clamping unit M and the hot pressing unit N'. The distance between the first composite point a3 and the guide roller D' is L1, and the distance between the guide roller D' and the second composite point a4 is L2. The distance L between the first composite point a3 and the second composite point a4 is equal to the sum of the distance L1 between the first composite point a3 and the guide roller D' and the distance L2 between the guide roller D' and the second composite point a4, i.e., L = L1 + L2.

[0175] In this embodiment, the dosage of elastic thread adhesive G1 is very small, only 0.0015~0.015 g / m / thread. The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3 (P2>P1), thereby ensuring the curing effect of elastic thread adhesive G1 and fixing adhesive G2 after bonding in the clamping process S4, preventing the elastic thread adhesive G1 and fixing adhesive G2 from seeping into the outer layer sheet continuous body 21C and / or the inner layer sheet continuous body 22C in the composite process S5, and improving the service life of the hot pressing unit N'.

[0176] In this embodiment, the distance P2 between the first adhesive application point a1 and the first composite point a3 is greater than the distance P1 between the second adhesive application point a2 and the first composite point a3, and the distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1. By extending the distance L between the first composite point a3 and the second composite point a4, the cooling and curing time of the elastic line adhesive G1 and the fixing adhesive G2 is increased, thereby improving the curing effect of the elastic line adhesive G1 and the fixing adhesive G2 after bonding in the clamping process S4, preventing the elastic line adhesive G1 and the fixing adhesive G2 from seeping into the outer layer sheet continuous body 21C and / or the inner layer sheet continuous body 22C in the composite process S5, and improving the service life of the hot pressing unit N'.

[0177] In this embodiment, since neither the first clamping roller M1 nor the second clamping roller M2 of the clamping unit M are cooling rollers, and the composite unit is a hot pressing unit N', the distance L2 between the guide roller D' and the second composite point a4 in this embodiment is longer than the distance L2 between roller D' and the second composite point a4 in Embodiment 1. That is, the distance L between the first composite point a3 and the second composite point a4 in this embodiment is longer than the distance L between the first composite point a3 and the second composite point a4 in Embodiment 1. This further extends the distance L between the first composite point a3 and the second composite point a4, thereby increasing the cooling and curing time of the elastic thread adhesive G1 and the fixing adhesive G2. This ensures the curing effect of the elastic thread adhesive G1 and the fixing adhesive G2 after bonding in the clamping process S4, preventing the elastic thread adhesive G1 and the fixing adhesive G2 from seeping into the hot pressing unit N', the outer layer sheet continuous body 21C, and / or the inner layer sheet continuous body 22C, and further improving the service life of the hot pressing unit N'.

[0178] Combination Figure 10 In this embodiment, a method for manufacturing an elastic composite sheet is provided, comprising:

[0179] The outer layer sheet continuous feeding process S1 is used to continuously convey the outer layer sheet continuous 21C along the flow direction to the clamping process S4.

[0180] The inner layer sheet continuous feeding process S2 is used to continuously convey the inner layer sheet continuous 22C along the flow direction to the clamping process S4.

[0181] A first adhesive application point a1 is provided on the transport path of the outer sheet continuous 21C and / or the transport path of the inner sheet continuous 22C, and a fixing adhesive G2 is intermittently applied to the surface of the outer sheet continuous 21C and / or the inner sheet continuous 22C at the first adhesive application point a1.

[0182] The elastic wire continuous body supply process S3 is used to continuously transport multiple elastic wire continuous bodies 23C along the flow direction to the clamping process S4.

[0183] A second application point a2 is set on the conveying path of the elastic thread continuum 23C, and elastic thread adhesive G1 is continuously sprayed onto the outer periphery of multiple elastic thread continuums 23C at the second application point a2; wherein, the dosage of elastic thread adhesive G1 is 0.0015~0.015g / m / thread.

[0184] The open time of the fixing adhesive G2 intermittently applied to the surfaces of the outer sheet continuous 21C and / or the inner sheet continuous 22C is 0.4–0.7 s, and the operating temperature is 130–160 °C. The open time of the elastic wire adhesive G1 sprayed on the periphery of the multi-elastic wire continuous 23C is 0.1–0.3 s, and the operating temperature is 150–180 °C.

[0185] The clamping process S4 is used to combine the inner sheet continuous 22C, the multiple elastic line continuous 23C and the outer sheet continuous 21C at the first composite point a3, so that the multiple elastic line continuous 23C is fixed between the outer sheet continuous 21C and the inner sheet continuous 22C to form an elastic composite sheet semi-finished product 20S.

[0186] In this embodiment, the clamping process S4 includes a clamping unit M. The clamping unit M includes a first clamping roller M1 and a second clamping roller M2 arranged opposite to each other. The outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2 are tangentially attached to form a first composite point a3.

[0187] The first clamping roller M1 or the second clamping roller M2 is driven to rotate by a motor (not shown in the figure) or other driving device. The outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C are clamped together by the outer peripheral surfaces of the first clamping roller M1 and the second clamping roller M2, and rotated at the same time. At the first composite point a3, the inner layer sheet continuous body 22C, the multiple elastic line continuous bodies 23C and the outer layer sheet continuous body 21C are composited together. The multiple elastic line continuous bodies 23C are fixed between the outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C in the area outside the fixed area C1. The multiple elastic line continuous bodies 23C are fixed between the outer layer sheet continuous body 21C and the inner layer sheet continuous body 22C in the fixed area C1, forming an elastic composite sheet semi-finished product 20S.

[0188] The distance P2 between the first application point a1 and the first composite point a3 is greater than the distance P1 between the second application point a2 and the first composite point a3, i.e., P2 > P1.

[0189] The composite process S5 is used to join the inner layer sheet continuous 22C and the outer layer sheet continuous 21C of the elastic composite sheet semi-finished product 20S to form an array of multiple joints 40 at the second composite point a4, and to form the elastic composite sheet 20.

[0190] In this embodiment, the composite process S5 includes a hot pressing unit N'. The hot pressing unit N' includes an anvil roller N1' and a pressure roller N2' arranged opposite to each other. The outer peripheral surfaces of the anvil roller N1' and the pressure roller N2' are tangentially bonded to form a second composite point a4.

[0191] The elastic composite sheet semi-finished product 20S is conveyed along the flow direction to the second composite point a4. The hot pressing unit N' joins the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S to form an array of multiple joints 40, and forms the elastic composite sheet 20.

[0192] Specifically, the anvil roller N1' and the pressure roller N2' are driven to rotate by a drive device such as a motor (not shown in the figure). The outer periphery of the pressure roller N2' is provided with a plurality of second protrusions (not shown in the figure) for forming joints 40. The plurality of second protrusions are arranged at intervals along the circumferential direction of the pressure roller N2' and are arranged in a straight line, oblique line or curved line along the axial direction of the pressure roller N2'. The elastic composite sheet semi-finished product 20S is conveyed to the second composite point a4 along the flow direction. The elastic composite sheet semi-finished product 20S is pressed against each other by the outer periphery of the anvil roller N1' and the pressure roller N2', and the elastic composite sheet semi-finished product 20S is locally pressurized and heated, so that the inner layer sheet continuous body 22C and the outer layer sheet continuous body 21C of the elastic composite sheet semi-finished product 20S are joined together to form an array of a plurality of joints 40, and thus form the elastic composite sheet 20.

[0193] The distance L between the first composite point a3 and the second composite point a4 is greater than the distance P2 between the first adhesive application point a1 and the first composite point a3, i.e., L > P2 > P1.

[0194] The processes and structures of the manufacturing apparatus for the other manufacturing methods in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0195] The following points need to be explained:

[0196] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0197] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "below" another element, the element may be "directly" located "on" or "below" the other element or there may be intermediate elements.

[0198] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0199] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. An apparatus for manufacturing an elastic composite sheet, characterized in that, The manufacturing apparatus includes: a fixed adhesive application device, an auxiliary adhesive application device, a clamping unit, and a compounding unit; The fixing adhesive application device is arranged at the first application point on the transport path of the outer sheet continuous and / or the transport path of the inner sheet continuous, and is used to intermittently apply fixing adhesive to the surface of the outer sheet continuous and / or the inner sheet continuous. The auxiliary adhesive application device is arranged at the second application point on the conveying path of the elastic thread continuum, and is used to continuously spray elastic thread adhesive onto the outer periphery of multiple elastic thread continuums; wherein, the dosage of elastic thread adhesive is 0.0015~0.015g / m / thread; The clamping unit is located downstream of the fixing adhesive application device and the auxiliary adhesive application device, and the composite unit is located downstream of the clamping unit; The clamping unit includes a first composite point. The clamping unit combines the inner sheet continuous, multiple elastic line continuous and outer sheet continuous at the first composite point, so that the multiple elastic line continuous are fixed between the outer sheet continuous and the inner sheet continuous to form an elastic composite sheet semi-finished product. The composite unit includes a second composite point, at which the inner and outer continuous sheets of the elastic composite sheet semi-finished product are joined together to form an array of multiple joints. The distance between the first adhesive application point and the first composite point is greater than the distance between the second adhesive application point and the first composite point, and the distance between the first composite point and the second composite point is greater than the distance between the first adhesive application point and the first composite point.

2. The manufacturing apparatus according to claim 1, characterized in that, The open time of the fixing adhesive intermittently applied to the surface of the outer sheet continuum and / or the inner sheet continuum is 0.4 to 0.7 s, and the service temperature is 130 to 160 ℃. The open time of the elastic adhesive continuously sprayed on the outer periphery of the multi-elastic continuum is 0.1 to 0.3 seconds, and the operating temperature is 150 to 180°C.

3. The manufacturing apparatus according to claim 1, characterized in that, The elastic thread adhesive is wrapped around the outer periphery of the elastic thread continuum in a winding manner; in the elastic composite sheet semi-finished product, the elastic thread adhesive and the fixing adhesive have overlapping portions, or the elastic thread adhesive and the fixing adhesive are disposed separately.

4. The manufacturing apparatus according to claim 1, characterized in that, The clamping unit includes a first clamping roller and a second clamping roller arranged opposite to each other; the outer peripheral surfaces of the first clamping roller and the second clamping roller are tangentially attached to form the first composite point; The composite unit is an ultrasonic heat sealing unit, which includes a bottom roller and an ultrasonic welding head; the second composite point is formed between the bottom roller and the ultrasonic welding head; Wherein, the first clamping roller and / or the second clamping roller are cooling rollers to accelerate the cooling and curing of the fixing adhesive intermittently applied to the surface of the outer sheet continuous and / or the inner sheet continuous.

5. The manufacturing apparatus according to claim 1, characterized in that, The clamping unit includes a first clamping roller and a second clamping roller arranged opposite to each other; the outer peripheral surfaces of the first clamping roller and the second clamping roller are tangentially attached to form a first composite point; The composite unit is an ultrasonic heat sealing unit, which includes a bottom roller and an ultrasonic welding head; a second composite point is formed between the bottom roller and the ultrasonic welding head; A cooling unit, which is a cooling roller, is arranged between the clamping unit and the composite unit to accelerate the cooling and curing of the fixing adhesive intermittently applied to the surface of the outer sheet continuous and / or the inner sheet continuous.

6. The manufacturing apparatus according to claim 4 or 5, characterized in that, The bottom roller has a plurality of first protrusions forming a joint on its circumferential surface. The plurality of first protrusions are spaced apart along the circumferential direction of the bottom roller and are arranged in a straight line, oblique line or curved line along the axial direction of the bottom roller.

7. The manufacturing apparatus according to claim 1, characterized in that, The clamping unit includes a first clamping roller and a second clamping roller arranged opposite to each other; the outer peripheral surfaces of the first clamping roller and the second clamping roller are tangentially attached to form a first composite point; The composite unit is a hot pressing unit, which includes an anvil roller and a pressure roller arranged opposite to each other; the outer peripheral surfaces of the anvil roller and the pressure roller are tangentially bonded to form a second composite point.

8. The manufacturing apparatus according to claim 7, characterized in that, The outer periphery of the pressure roller is provided with a plurality of second protrusions forming a joint. The plurality of second protrusions are arranged at intervals along the circumferential direction of the pressure roller and are arranged in a straight line, oblique line or curved line along the axial direction of the pressure roller.

9. The manufacturing apparatus according to claim 4 or 5, characterized in that, The cooling roller has a fluid inside for cooling the adhesive, or is equipped with a temperature control system, or has a heat dissipation and suction channel designed inside.

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