Elastic composite sheet

Abstract

According to the elastic composite sheet, the elastic composite sheet comprises an outer-layer sheet and an inner-layer sheet in the thickness direction; a plurality of elastic lines extending in the transverse direction are arranged between the outer-layer sheet and the inner-layer sheet; the outer-layer sheet and the inner-layer sheet are mutually jointed through a plurality of joint parts of the array; at least one row of joint parts is arranged between every two adjacent elastic lines in the longitudinal direction, and the joint parts and the elastic lines are arranged in a staggered mode in the longitudinal direction; wherein the peripheries of the plurality of elastic wires are continuously coated with an elastic wire binder, so that the plurality of elastic wires are fixed between the outer-layer sheet and the inner-layer sheet in the area outside the fixed area, and the dosage of the elastic wire binder is 0.0015-0.015 g / m / piece. According to the elastic composite sheet, when the outer-layer sheet and the inner-layer sheet are mutually jointed to form a plurality of joint parts at intervals, the plurality of elastic lines are fixed between the outer-layer sheet and the inner-layer sheet and cannot mutually move or freely move, so that wrinkles formed by the elastic composite sheet are relatively uniform, and the attractiveness is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products technology, and particularly to the fields of baby pull-up pants, adult pull-up pants, women's sanitary pants and disposable underwear, especially to an elastic composite sheet material. Background Technology

[0002] Disposable hygiene products, such as shorts-type absorbent items, generally have an outer body and an absorbent core. The outer body is located at the front waist on the side of the wearer's abdomen, at the back on the side of the wearer's back, and at the crotch between the front waist and the back. The absorbent core is fixed to the inner surface of the outer body and extends from the front waist through the crotch to the back.

[0003] The front waist and back are typically made of an elastic composite sheet consisting of an outer sheet, an inner sheet, and multiple elastic threads between them, creating an elastic waistband. Some areas of the elastic composite sheet are bonded without adhesive. In these areas, the outer and inner sheets are joined together using hot pressing or ultrasonic bonding to form multiple spaced joints, creating accordion-like, regular pleats. For example, Chinese Utility Model Patent CN 203677383 U discloses a composite stretchable sheet.

[0004] In existing technologies, the formation of regular accordion pleats in elastic composite sheets is usually achieved by using hot pressing (heat sealing bonding) or ultrasonic processes to join the outer and inner sheets together.

[0005] When the outer and inner layers of an elastic composite sheet are joined together using a hot-pressing process (heat-sealing bonding process) to form multiple spaced joints, the multiple elastic threads sandwiched between the outer and inner layers are in a free state, and are only fixed in the fixed area. This method has the following problems: When the outer and inner layers are joined together using a hot-pressing process (heat-sealing bonding process) to form multiple spaced joints, because the elastic threads are in a free state between the outer and inner layers, the areas where the elastic threads form joints between the outer and inner layers are prone to shifting, affecting the formation of regular wrinkles (the wrinkles may sometimes be uneven), especially for elastic threads with weaker resilience or thinner elasticity, this phenomenon will be more obvious. Furthermore, since the elastic lines are free between the outer and inner sheets, when the hot pressing process (heat sealing bonding process) is used to join the outer and inner sheets to form multiple spaced joints, the elastic lines may move around and cause the spacing between the elastic lines to be too small (e.g., 3mm). This greatly increases the risk of the hot pressing process (heat sealing bonding process) breaking the elastic lines. Utility Model Content

[0006] This utility model provides an elastic composite sheet to solve the technical problem in the prior art where, when the outer and inner layers of an elastic composite sheet are joined together to form multiple spaced joints, the elastic lines in the area where the joints are formed between the outer and inner layers are prone to shifting, resulting in uneven wrinkles and reduced aesthetics in the elastic composite sheet.

[0007] The technical solution provided by this utility model is as follows:

[0008] One objective of this utility model is to provide an elastic composite sheet, wherein the elastic composite sheet has mutually perpendicular transverse, longitudinal, and thickness directions;

[0009] Along the thickness direction, the elastic composite sheet includes an outer sheet and an inner sheet; multiple elastic lines extending laterally are arranged between the outer sheet and the inner sheet;

[0010] The outer sheet and the inner sheet are joined together by an array of multiple joints; there is at least one row of joints between two adjacent elastic lines along the longitudinal direction, and the joints and the multiple elastic lines are arranged in a staggered manner along the longitudinal direction.

[0011] Along the transverse direction, the elastic composite sheet also includes a plurality of spaced-apart fixing areas; in the fixing areas, a plurality of the elastic wires are fixed between the outer sheet and the inner sheet;

[0012] In its natural state, outside the fixed area, the elastic composite sheet forms multiple longitudinally extending concave and convex folds on the outer and inner sheets respectively through the elastic lines.

[0013] The multiple elastic wires are continuously wrapped with elastic wire adhesive around their outer periphery, so that the multiple elastic wires are further fixed between the outer sheet and the inner sheet in the area outside the fixing area; the dosage of the elastic wire adhesive is 0.0015~0.015g / m / wire, and the dosage of the elastic wire adhesive increases with the increase of the linear density of a single elastic wire.

[0014] In a preferred embodiment, the longitudinal spacing between two adjacent elastic lines is 2 to 12 mm, and the linear density of the elastic lines is related to the longitudinal spacing as 50 to 250 dtex / mm.

[0015] In a preferred embodiment, the dimension of the fixing area in the lateral direction is 10mm to 50mm.

[0016] In a preferred embodiment, the bonding strength of the elastic composite sheet in the fixed area is greater than the bonding strength outside the fixed area.

[0017] In a preferred embodiment, when the elastic composite sheet shrinks to its natural state, the thickness of the fixed area is less than the thickness outside the fixed area along the thickness direction.

[0018] In a preferred embodiment, in the fixing area, a plurality of the elastic wires are fixed between the outer sheet and the inner sheet by a fixing adhesive, the fixing adhesive being applied to the plurality of the elastic wires, or the fixing adhesive being applied to the inner surface of the outer sheet and / or the inner sheet.

[0019] In a preferred embodiment, along the longitudinal direction, the spacing between two adjacent elastic lines is a multiple of the spacing between two adjacent rows of the joint.

[0020] In a preferred embodiment, along the longitudinal direction, the distance between two adjacent elastic lines is a multiple of the distance between two adjacent rows of joints as follows: b = (1~6)*a, where a is the distance between two adjacent rows of joints and b is the distance between two adjacent elastic lines.

[0021] In a preferred embodiment, the plurality of said joints are arranged in a longitudinal row and the plurality of said joints are arranged in a transverse row;

[0022] Along the longitudinal direction, the arrangement of each column of the joints can be linear, diagonal, or curved.

[0023] In a preferred embodiment, when the arrangement of each column of the joints is diagonal, each column of the joints forms an angle with the longitudinal direction, the angle being greater than 0° and less than or equal to 15°, or greater than or equal to -15° and less than 0°.

[0024] The above-described technical solution of this utility model has at least the following beneficial effects compared with the prior art:

[0025] This invention provides an elastic composite sheet, in which an outer sheet and an inner sheet are joined together by an array of multiple joints. At least one row of joints exists between any two adjacent elastic threads along the longitudinal direction, and the joints and multiple elastic threads are arranged in a staggered manner along the longitudinal direction. The outer periphery of each elastic thread is continuously coated with an elastic thread adhesive, which helps to fix the multiple elastic threads between the outer and inner sheets in areas outside the fixed area. The dosage of the elastic thread adhesive is 0.0015–0.015 g / m / thread. When the outer and inner sheets are joined together to form multiple spaced joints, the multiple elastic threads are fixed between the outer and inner sheets. In the area where the multiple elastic threads form the joints between the outer and inner sheets, they cannot move freely or shift, resulting in more uniform wrinkles in the elastic composite sheet and a significantly improved aesthetic appearance.

[0026] This invention provides an elastic composite sheet in which multiple elastic threads sandwiched between an outer and an inner sheet contract laterally, causing both the outer and inner sheets to contract and forming 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. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a partial planar unfolded schematic diagram of an elastic composite sheet according to this utility model.

[0029] Figure 2 yes Figure 1 Cross-sectional view in the RR direction.

[0030] Figure 3 This is a schematic diagram showing that, in some embodiments of this utility model, multiple elastic lines and joints are arranged in a staggered manner.

[0031] Figure 4 This is a schematic diagram showing that in some other embodiments of the present invention, multiple elastic lines and joints are arranged in a staggered manner.

[0032] Figure 5 This is a schematic diagram showing that multiple elastic lines and joints are arranged in a staggered manner in some embodiments of this utility model.

[0033] Figure 6 This is a schematic diagram showing that in some embodiments of the present invention, multiple elastic lines and joints are arranged in a staggered manner.

[0034] Figure 7 This is a photograph of an elastic composite sheet material under tension according to this utility model.

[0035] Figure 8 This is a photograph of an elastic composite sheet in its contracted state according to this utility model.

[0036] Figure 9 This is an enlarged cross-sectional view of an elastic composite sheet material in a contracted state, according to this utility model. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Combination Figures 1 to 9 According to an embodiment of the present invention, an elastic composite sheet 10 is provided. The elastic composite sheet 10 has mutually perpendicular transverse, longitudinal, and thickness directions, such as... Figure 1 and Figure 2 As shown.

[0041] Combination Figure 1 and Figure 2 Along the thickness direction, the elastic composite sheet 10 includes an outer sheet 11 and an inner sheet 12; multiple elastic lines 13 extending laterally are arranged between the outer sheet 11 and the inner sheet 12.

[0042] Along the transverse direction, the elastic composite sheet 10 also includes a plurality of spaced-apart fixing areas 30. In the fixing areas 30, a plurality of elastic wires 13 are fixed between the outer sheet 11 and the inner sheet 12. The dimension of the fixing areas 30 along the transverse direction is 10mm to 50mm.

[0043] like Figure 1As shown, this embodiment provides two fixed areas 30, but in some embodiments, there may be more fixed areas 30.

[0044] Furthermore, in the fixing area 30, multiple elastic wires 13 are fixed between the outer sheet 11 and the inner sheet 12 by a fixing adhesive G2, such as... Figure 2 As shown; it should be noted that, in the fixing area 30, the fixing adhesive G2 can be applied to the multiple elastic threads 13, or to the inner surface of the outer sheet 11 and / or the inner sheet 12; if the fixing adhesive G2 is applied to the multiple elastic threads 13, 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 11 and / or the inner sheet 12, 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 thread 13. Therefore, the elastic thread 13 is completely fixed between the outer sheet 11 and the inner sheet 12 in the fixing area 30.

[0045] like Figure 1 As shown, according to an embodiment of the present invention, the outer sheet 11 and the inner sheet 12 are joined together by an array of multiple joints 20. At least one row of joints 20 is provided between two adjacent elastic threads 13 along the longitudinal direction, and the joints 20 and the multiple elastic threads 13 are arranged in a staggered manner along the longitudinal direction. In its natural state, in the area outside the fixed area 30, the elastic composite sheet 10 forms multiple longitudinally extending concave-convex folds on the outer sheet 11 and the inner sheet 12 respectively through the expansion and contraction of the elastic threads 13.

[0046] Specifically, such as Figure 2 As shown, the outer sheet 11 and the inner sheet 12 are joined together by means of hot pressing or ultrasonic waves to form multiple spaced joints 20.

[0047] Combination Figures 3 to 6 Multiple joints 20 are arranged in a generally regular column along the longitudinal direction, and multiple joints 20 are arranged in a row along the transverse direction.

[0048] In some embodiments, the plurality of joints 20 are arranged in a diagonal pattern along the longitudinal direction, such as... Figures 3 to 5 As shown. When the arrangement of each column of joints is diagonal, each column of joints forms an angle with the longitudinal direction, and the angle is greater than 0° and less than or equal to 15°, or greater than or equal to -15° and less than 0°.

[0049] In some embodiments, the arrangement of the plurality of joints 20 along the longitudinal direction can also be linear, that is, the angle between each column of joints 20 and the longitudinal direction is 0°.

[0050] In some embodiments, the plurality of joints 20 are arranged in a curved pattern along the longitudinal direction, such as... Figure 6 As shown.

[0051] Along the longitudinal direction, the distance between two adjacent elastic lines 13 is a multiple of the distance between two adjacent rows of joints 20. Specifically, along the longitudinal direction, the distance between two adjacent elastic lines 13 is a multiple of the distance between two adjacent rows of joints 20 as follows: b = (1~6)*a, where a is the distance between two adjacent rows of joints 20, and b is the distance between two adjacent elastic lines 13, such as b = a, or b = 2a, or b = 3a, or b = 4a, or b = 5a, or b = 6a.

[0052] In some embodiments, the shape of the joint 20 is an elliptical, circular, strip-shaped regular or irregular shape. Specifically, as shown in the figure... Figure 3 As shown, the joint 20 has an elliptical structure in the transverse direction, and there is a row of joints 20 between two adjacent elastic lines 13 in the longitudinal direction. Figure 4 and 6 As shown, the joint 20 has a circular structure, with two rows of joints 20 between two adjacent elastic lines 13 along the longitudinal direction. Figure 5 As shown, the joint 20 is an elliptical structure along the longitudinal direction, and there are three rows of joints 20 between two adjacent elastic lines 13 along the longitudinal direction.

[0053] This utility model discloses an elastic composite sheet 10, in which multiple elastic threads 13 contract laterally, causing the outer sheet 11 and inner sheet 12 to contract, forming regular accordion pleats M (convex-concave pleats) between multiple spaced joints 20. Along any side of the thickness direction of the multiple elastic threads 13, the accordion pleats M have multiple protrusions and concave portions. A protrusion is formed between two adjacent rows of joints 20, and a concave portion is formed between two adjacent rows of protrusions. Along the thickness direction, two protrusions on both sides of the elastic thread 13 face each other, and two concave portions on both sides of the elastic thread 13 face each other, as shown below. Figure 7 , Figure 8 and Figure 9 As shown.

[0054] The wrinkling effect of the elastic composite sheet 10 can be optimized by having at least one row of joints 20 between two adjacent elastic lines 13 along the longitudinal direction, the ratio of the spacing between two adjacent rows of joints 20 along the longitudinal direction to the spacing between adjacent elastic lines 13, and the shape and arrangement of the joints 20.

[0055] In the prior art, in order to form regular accordion pleats M (convex and concave pleats) between multiple spaced joints 20 between the outer sheet 11 and the inner sheet 12, during the process of joining the outer sheet 11 and the inner sheet 12 to form multiple spaced joints 20 by hot pressing or ultrasonic bonding, multiple elastic threads 13 are in a free state outside the fixed area 30. However, when multiple elastic threads 13 are in a free state outside the fixed area 30, during the process of joining the outer sheet 11 and the inner sheet 12 to form multiple spaced joints 20 by hot pressing or ultrasonic bonding, the elastic threads 13 in the area where the joints 20 are formed between the outer sheet 11 and the inner sheet 12 are prone to shifting and breaking. As a result, the accordion pleats M formed by the elastic composite sheet 10 are uneven and the aesthetics are reduced.

[0056] To address the issue of elastic threads 13 shifting between the outer sheet 11 and the inner sheet 12 in the area where the joint 20 is formed during the hot-pressing or ultrasonic bonding process to create multiple spaced joints 20, this paper combines... Figure 1 and Figure 2 According to an embodiment of the present invention, the outer periphery of multiple elastic threads 13 is continuously wrapped with elastic thread adhesive G1, so that the multiple elastic threads 13 are assisted in fixing between the outer sheet 11 and the inner sheet 12 in the area outside the fixing area 30. The dosage of elastic thread adhesive G1 is 0.0015~0.015g / m / thread. The dosage of elastic thread adhesive G1 increases with the increase of the linear density of a single elastic thread 13. The elastic thread adhesive G1 may overlap with the fixing adhesive G2, or it may be set to avoid the fixing adhesive G2.

[0057] When a single elastic wire 13 is thinner, the amount of elastic wire adhesive G1 is less; when a single elastic wire 13 is thicker, the amount of elastic wire adhesive G1 is more.

[0058] For example, when the linear density of a single elastic wire 13 is 100 dtex, the dosage of elastic wire adhesive G1 is 0.0015 g / m / wire. When the linear density of a single elastic wire 13 is 940 dtex, the dosage of elastic wire adhesive G1 is 0.015 g / m / wire.

[0059] This utility model provides an elastic composite sheet 10 in which multiple elastic threads 13 are continuously wrapped with an elastic thread adhesive G1 around their outer periphery. This allows the multiple elastic threads 13 to be auxiliaryly fixed between the outer sheet 11 and the inner sheet 12 in areas outside the fixing area 30. When the outer sheet 11 and the inner sheet 12 are joined together to form multiple spaced joints 20, because the multiple elastic threads 13 are auxiliaryly fixed between the outer sheet 11 and the inner sheet 12 in areas outside the fixing area 30, the multiple elastic threads 13 in the area forming the joints 20 between the outer sheet 11 and the inner sheet 12 cannot move freely or shift between each other. This results in more uniform wrinkles formed by the expansion and contraction of the multiple elastic threads 13 in the elastic composite sheet 10, significantly improving its aesthetics and reducing the risk of the elastic threads 13 breaking during ultrasonic or hot pressing processes.

[0060] If the amount of elastic adhesive G1 continuously wrapped around the periphery of the multiple elastic threads 13 is too small (e.g., less than 0.0015 g / m / thread), the multiple elastic threads 13 cannot be stably fixed between the outer sheet 11 and the inner sheet 12 in areas outside the fixing area 30. There is still a risk of the multiple elastic threads 13 shifting or moving freely in the area where the joint 20 is formed between the outer sheet 11 and the inner sheet 12. If the amount of elastic adhesive G1 continuously wrapped around the periphery of the multiple elastic threads 13 is too large (e.g., greater than 0.015 g / m / thread), the outer sheet 11 and the inner sheet 12 may adhere to each other in areas outside the fixing area 30. This results in irregular and unsightly accordion folds M formed between the multiple spaced joints 20 of the outer sheet 11 and the inner sheet 12.

[0061] The dosage of the elastic thread adhesive G1 of this utility model is 0.0015~0.015g / m / thread. In areas other than the fixing area 30, multiple elastic threads 13 can stably assist in fixing between the outer sheet 11 and the inner sheet 12.

[0062] The auxiliary fixation here is not like the fixation area 30 mentioned above, where the elastic wires 13 are completely fixed between the outer sheet 11 and the inner sheet 12. Instead, it only serves a minor fixing function. The purpose is to prevent the multiple elastic wires 13 from moving around or moving freely in the area where the joint 20 is formed between the outer sheet 11 and the inner sheet 12 during the process of joining the outer sheet 11 and the inner sheet 12 to form multiple spaced joints 20. This avoids breaking the elastic wires 13. At the same time, the elastic wire adhesive G1 covering the outer periphery of the multiple elastic wires 13 will not affect the formation of regular and beautiful accordion pleats M (concave and convex pleats) between the outer sheet 11 and the inner sheet 12. Therefore, it only plays an auxiliary fixing role.

[0063] This utility model discloses an elastic composite sheet 10. In the area outside the fixed area 30, multiple elastic threads 13 sandwiched between the outer sheet 11 and the inner sheet 12 contract laterally, causing the outer sheet 11 and the inner sheet 12 to contract, forming regular accordion pleats M (concave-convex pleats) between the outer sheet 11 and the inner sheet 12 at multiple spaced joints 20. Figure 7 , Figure 8 and Figure 9 As shown.

[0064] In this invention, because the dosage of the elastic thread adhesive G1 is very small, only 0.0015~0.015 g / m / thread, during the use of the elastic composite sheet 10 (during repeated elongation and contraction), multiple elastic threads 13 will partially or completely detach from the outer sheet 11 and / or inner sheet 12. This further ensures that the outer sheet 11 and inner sheet 12 form regular and aesthetically pleasing accordion pleats M between multiple spaced joints 20, such as... Figure 9 As shown.

[0065] According to an embodiment of this utility model, the longitudinal spacing between two adjacent elastic lines 13 is 2 to 12 mm, and the linear density of the elastic lines 13 is related to the longitudinal spacing by 50 to 250 dtex / mm. That is, for every 1 mm increase in the longitudinal spacing between two adjacent elastic lines 13, the linear density of the multiple elastic lines 13 increases by 50 to 250 dtex.

[0066] By considering the relationship between the linear density specifications and longitudinal spacing of the multiple elastic lines 13, a better shrinkage effect of the elastic composite sheet 10 can be achieved, and the effect of the accordion pleats M of the elastic composite sheet 10 can be optimized.

[0067] According to an embodiment of this utility model, the bonding strength of the elastic composite sheet 10 in the fixed area 30 is greater than the bonding strength in the area outside the fixed area 30. For example, the bonding strength in the fixed area 30 is 0.5 N / 25 mm, and the bonding strength in the area outside the fixed area 30 is 0.2 N / 25 mm. When the elastic composite sheet 10 shrinks to its natural state, the thickness of the fixed area 30 is less than the thickness of the area outside the fixed area 30 along the thickness direction.

[0068] The following points need to be explained:

[0069] (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.

[0070] (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.

[0071] (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.

[0072] 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 elastic composite sheet, characterized by, The elastic composite sheet has mutually perpendicular transverse, longitudinal and thickness directions; In the thickness direction, the elastic composite sheet comprises an outer sheet and an inner sheet; a plurality of elastic threads extending in the transverse direction are arranged between the outer sheet and the inner sheet; The outer sheet and the inner sheet are combined with each other through an array of a plurality of joints; at least one row of joints is arranged between two adjacent elastic threads in the longitudinal direction, and the joints and the plurality of elastic threads are arranged in a staggered manner in the longitudinal direction; In the transverse direction, the elastic composite sheet further comprises a plurality of fixed regions spaced apart from each other; in the fixed regions, the plurality of elastic threads are fixed between the outer sheet and the inner sheet; In the natural state, in the regions other than the fixed regions, the elastic composite sheet forms a plurality of longitudinal extending concave-convex wrinkles on the outer sheet and the inner sheet through the elastic threads; The outer periphery of the plurality of elastic threads is continuously covered with an elastic thread adhesive, which helps to fix the plurality of elastic threads between the outer sheet and the inner sheet in the regions other than the fixed regions; the dosage of the elastic thread adhesive is 0.0015-0.015 g / m / elastic thread, and the dosage of the elastic thread adhesive increases with the increase of the linear density of a single elastic thread.

2. The elastic composite sheet according to claim 1, wherein The longitudinal spacing between two adjacent elastic threads is 2-12 mm, and the linear density of the elastic thread and the longitudinal spacing satisfy the relationship: 50-250 dtex / mm.

3. The elastic composite sheet according to claim 1, wherein The size of the fixed region in the transverse direction is 10-50 mm.

4. The elastic composite sheet according to claim 1, wherein The joint strength of the elastic composite sheet in the fixed region is greater than that in the regions other than the fixed regions.

5. The elastic composite sheet according to claim 1, wherein When the elastic composite sheet shrinks to the natural state, the thickness of the fixed region in the thickness direction is less than that of the regions other than the fixed regions.

6. The elastic composite sheet according to claim 1, wherein In the fixed regions, the plurality of elastic threads are fixed between the outer sheet and the inner sheet through a fixing adhesive, which is coated on the plurality of elastic threads or the inner surface of the outer sheet and / or the inner sheet.

7. The elastic composite sheet according to claim 1, wherein In the longitudinal direction, the spacing between two adjacent elastic threads is in a multiple relationship with the spacing between two adjacent rows of joints.

8. The elastic composite sheet according to claim 7, wherein In the longitudinal direction, the spacing between two adjacent elastic threads is in a multiple relationship with the spacing between two adjacent rows of joints, i.e., b=(1-6)*a, where a is the spacing between two adjacent rows of joints, and b is the spacing between two adjacent elastic threads.

9. The elastic composite sheet according to claim 1, wherein The plurality of joints are arranged in columns in the longitudinal direction, and in rows in the transverse direction; In the longitudinal direction, the arrangement mode of each column of joints is linear, diagonal or curvilinear.

10. The elastic composite sheet according to claim 9, wherein When the arrangement mode of each column of joints is diagonal, each column of joints forms an angle with the longitudinal direction, and the angle is greater than 0° and less than or equal to 15°, or greater than or equal to -15° and less than 0°.

Images