Preparation method of shorts type wearing article

Abstract

The invention discloses a preparation method of a shorts-type wearing article. Compared with the prior art that a fastening component is temporarily fixed to an exterior body through a hot-melt adhesive in a folded state, the shorts-type wearing article has the advantages that the fastening component can be fixed to the exterior body through the hot-melt adhesive; according to the preparation method, the two sides of the base material continuous sheet and the hook element continuous sheet are folded towards the outer surface of the base material continuous sheet along the folding line to form the folded part continuous sheet, and the folded part continuous sheet and the base material continuous sheet form the fastening component semi-finished product; therefore, the hook element of the fastening member semi-finished product is temporarily fixed on the non-skin side surface of the back part or the front waist part of the pants-type wearing article corresponding to the outer cover body continuous sheet, so that a hot melt adhesive is prevented from adhering to the clothes or the skin of a wearer, the use cost of materials can be reduced, and the influence on the environment can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of disposable sanitary products, in particular to diapers, pull-on pants, sanitary pants, etc., and specifically to a method for preparing a shorts-type wearing article. Background Art

[0002] Pants-type wearing articles (e.g., openable pull-up pants products) generally include an elastic outer body, an absorbent body arranged inside the outer body, and fastening members (or fastening members) arranged on both sides of the outer body, and the fastening members are generally composed of a substrate sheet and a hook element. Among them, the outer body has a front waist corresponding to the wearer's ventral part, a back part corresponding to the wearer's back, and a crotch part arranged between the front waist and the back part. The front waist of the outer body is provided with easy tear lines on both sides, and the openable pants-type wearing articles in the prior art have fastening members and easy tear lines arranged on the same side of the front waist, and the fastening members and the front waist of the outer body can be repeatedly attached or removed. Before wearing, the fastening members are attached to the front waist of the outer body; when wearing, the fastening members are removed from the front waist of the outer body, and the easy tear lines are separated; after wearing, the fastening members are attached to the front waist of the outer body again.

[0003] At present, there is another openable shorts-type wearing article on the market. Before wearing (when not in use), the fastening member is temporarily fixed to the back in a folded state. In the process of preparing shorts-type wearing articles, hot melt adhesive (also known as hot melt glue) is usually used to temporarily fix the fastening member to the back of the shorts-type wearing article. When worn, the fastening member fits the front waist of the wearer in a stretched state, and the hot melt adhesive used for temporary fixation will remain on the fastening member. The residual hot melt adhesive is easy to adhere to the clothes or skin of the wearer, which not only affects the appearance of the wearing article, but also the use of hot melt adhesive increases the production cost and has a negative impact on the environment.

[0004] Moreover, in the prior art, when preparing an openable shorts-type wearing article, in the process of forming a single fastening member, after the hook element continuous sheet is compounded with the base material continuous sheet, the two are cut together at the cutting line position, and then directly compounded with the outer body continuous sheet, without rotating the cut base material continuous sheet and the hook element continuous sheet together by 90°. Especially for shorts-type wearing articles of larger size, since the CD direction of the base material continuous sheet corresponds to the length direction of a single shorts-type wearing article, the formation process of a single fastening member will occupy a large equipment space, resulting in unnecessary waste of resources. Therefore, it is necessary to reasonably optimize the preparation method in the prior art. Summary of the invention

[0005] The present application provides a method for preparing a shorts-type wearing article. Compared with the method in the prior art where a fastening member is temporarily fixed to an outer body in a folded state by a hot-melt adhesive, the present application preparation method folds both sides of a substrate continuous sheet together with a hook element continuous sheet along a folding line toward the outer surface of the substrate continuous sheet to form a folded continuous sheet, and forms a semi-finished fastening member with the substrate continuous sheet, so that the hook element of the semi-finished fastening member is temporarily fixedly connected to the non-skin side of the back or front waist of the outer body continuous sheet corresponding to the shorts-type wearing article, thereby not only avoiding the hot-melt adhesive from adhering to the clothes or skin of the wearer, but also reducing the use of hot-melt adhesive, thereby reducing material costs and reducing the impact on the environment. On the other hand, in the preparation method of the present application, the substrate continuous sheet and the folded continuous sheet pulled along the MD direction are rotated 90 degrees in the CD direction after the cutting operation to form a single semi-finished fastening member, so as to solve the problem that the single fastening member formation process in the prior art occupies a large amount of equipment space, thereby avoiding waste of resources.

[0006] The present application provides a method for preparing a shorts-type wearing article, which has an MD direction and a CD direction that are orthogonal to each other, wherein the MD direction is an equipment flow direction, the shorts-type wearing article has an outer body and a fastening member, the outer body has a tear line that passes through the front waist or the back, the fastening member includes a substrate sheet, a hook element, and a fastening member joint portion, the fastening member is configured to have a bending portion, and one of the bending portion and the tear line is located at the front waist, and the other is located at the back; the preparation method comprises:

[0007] The fastening member forming step includes: cutting the base material continuous sheet and the folded portion continuous sheet pulled in the MD direction at the cutting line position, and rotating the cut base material continuous sheet and the folded portion continuous sheet together in the CD direction by 90 degrees, so that the cut and turned base material continuous sheet and the folded portion continuous sheet form a single fastening member semi-finished product;

[0008] A step of temporarily fixing a fastening member: temporarily fixing the hook element of the semi-finished fastening member to a non-skin side of an outer body continuous sheet corresponding to the back or front waist of the shorts-type wearing article, wherein the outer body continuous sheet includes an easy tear line extending along the CD direction at the front waist or the back corresponding to a single shorts-type wearing article;

[0009] A product folding step: folding the outer body continuous sheet along the process center line corresponding to the boundary between the front part and the back part of the shorts-type wearing article; the product folding step is on the downstream side of the fastening member temporary fixing step, wherein the process center line is the reference line for preparing the shorts-type wearing article;

[0010] Product sealing process: fix the fastening component semi-finished product and the outer body continuous sheet by heat pressing or ultrasonic process, so that the outer body continuous sheet forms a pair of side sealing parts corresponding to the middle position of two adjacent shorts-type wearing articles, and forms the fastening component joint part between the fastening component semi-finished product and the outer body continuous sheet, wherein the side sealing part overlaps with the fastening component joint part in the thickness direction; the product sealing process is on the downstream side of the product folding process.

[0011] In some embodiments of the present application, at the upstream side of the fastening member forming process, the preparation method further includes:

[0012] A substrate sheet conveying step: providing a substrate continuous sheet and conveying the substrate continuous sheet along the MD direction;

[0013] A hook element compounding process is provided at the downstream side of the substrate sheet conveying process, providing a pair of hook element continuous sheets, and compounding the hook element continuous sheets on the inner surface of the substrate continuous sheet, wherein the hook element continuous sheets are symmetrically arranged at both ends of the substrate continuous sheet along the CD direction;

[0014] Folding process: located on the downstream side of the hook element compounding process, the folding lines extending along the MD direction along both sides of the base material continuous sheet and the hook element continuous sheet are folded toward the outer surface of the base material continuous sheet to form a folded portion continuous sheet, and the folded portion continuous sheet is symmetrically located at both ends of the base material continuous sheet along the CD direction.

[0015] In some embodiments of the present application, the preparation method also includes: a temporary portion forming process, which is arranged between the folding process and the fastening member forming process, and the temporary portion forming process includes joining the substrate continuous sheet and the folding portion continuous sheet through a hot pressing process or an ultrasonic process to form a plurality of intermittent temporary portions, so that the folding portion continuous sheet is temporarily fixed on the substrate continuous sheet.

[0016] In some embodiments of the present application, the temporary portion and the hook element continuous sheet have an overlapping portion.

[0017] In some embodiments of the present application, the preparation method also includes: an arc cutting process for the substrate continuous sheet, wherein the arc cutting process for the substrate continuous sheet is arranged between the hook element compounding process and the folding process, and the arc cutting process for the substrate continuous sheet includes performing arc cutting on the substrate continuous sheet located outside the hook element continuous sheet so that the outer edge of the substrate continuous sheet forms an arc structure.

[0018] In some embodiments of the present application, the preparation method also includes: a leg arc cutting process, which is arranged between the fastening component temporary fixing process and the product folding process, and the leg arc cutting process includes cutting the parts of the outer body continuous sheet corresponding to the absorbent body on both sides along the MD direction into an arc to form an arc-shaped leg circumference line.

[0019] In some embodiments of the present application, on the downstream side of the product sealing process, the preparation method further includes: a product cutting process: cutting the semi-finished fastening component and the continuous outer body sheet along the middle area of ​​a pair of side sealing portions.

[0020] In some embodiments of the present application, in the product sealing process, the side sealing portion and the fastening member engaging portion are formed together by using the same process, or are formed successively by using the same or different processes.

[0021] In some embodiments of the present application, on the upstream side of the product folding process, the preparation method further includes: a dotted line cutting process: performing a dotted line cutting operation on both sides of the outer body continuous sheet corresponding to the front waist or back of a single shorts-type wearing article along the MD direction, so that the single shorts-type wearing article forms the tear line extending along the CD direction.

[0022] In some embodiments of the present application, at the downstream side of the product folding process, the orthographic projection of the easy tear line along the thickness direction is located in the area between the side sealing portion and the bending portion along the MD direction.

[0023] In some embodiments of the present application, on the upstream side of the dotted line cutting process, the preparation method also includes: a first reinforcement fixing process: by using at least one of a hot melt adhesive, heat pressing and ultrasonic processing, a first reinforcement fixing area is formed on both sides of the tear line of the outer body continuous sheet corresponding to the shorts-type wearing article located at the front waist or the back.

[0024] In some embodiments of the present application, on the upstream side of the dotted line cutting process, the preparation method also includes: a second reinforcement and fixing process: by at least one of a hot melt adhesive, hot pressing and ultrasonic process, a second reinforcement and fixing area is formed in an area of ​​the outer body continuous sheet corresponding to the shorts-type wearing article located at the back or the front waist and corresponding to the single fastening component semi-finished product, wherein one of the second reinforcement and fixing area and the first reinforcement and fixing area is located at the front waist of the outer body continuous sheet corresponding to the shorts-type wearing article, and the other is located at the back of the outer body continuous sheet corresponding to the shorts-type wearing article.

[0025] In some embodiments of the present application, the preparation method further includes: an outer body forming step: compounding the first continuous sheet, the second continuous sheet and a plurality of first continuous elastic members to form an outer body continuous sheet transported along the MD direction.

[0026] In some embodiments of the present application, the preparation method further includes an inner compounding step: compounding the absorbent body onto the outer body continuous sheet transported along the MD direction.

[0027] The present application provides a method for preparing a shorts-type wearing article. Compared with the prior art method of temporarily fixing the fastening member to the outer body in a folded state by using a hot melt adhesive, the present application provides a method for preparing a shorts-type wearing article. The method folds both sides of the substrate continuous sheet and the hook element continuous sheet along the folding line toward the outer surface of the substrate continuous sheet to form a folded continuous sheet, and forms a semi-finished fastening member with the substrate continuous sheet, so that the hook element of the semi-finished fastening member is temporarily fixedly connected to the non-skin side of the back or front waist of the outer body continuous sheet corresponding to the shorts-type wearing article, thereby not only avoiding the hot melt adhesive from adhering to the clothes or skin of the wearer, but also reducing the use of hot melt adhesive, thereby reducing material costs and reducing the impact on the environment. On the other hand, in the application preparation method, the substrate continuous sheet and the folded continuous sheet pulled along the MD direction are rotated 90° in the CD direction after the cutting operation to form a single semi-finished fastening member, so as to solve the problem that the single fastening member formation process in the prior art occupies a large amount of equipment space, thereby avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of a shorts-type wearing article in an embodiment of the present application. When viewed from the skin side surface, the shorts-type wearing article is in an unfolded and stretched state.

[0030] Figure 2 for Figure 1 Schematic diagram of the cross-section of the shorts-type wearing article along the SS direction.

[0031] Figure 3 It is a schematic cross-sectional view of the outer body before the front waist portion and the rear back portion are separated in the embodiment of the present application.

[0032] Figure 4It is a schematic cross-sectional view of the outer body after the front waist portion and the rear back portion are separated in the embodiment of the present application.

[0033] Figure 5 It is a schematic flow chart of a method for preparing a shorts-type wearing article in an embodiment of the present application.

[0034] Figure 6 It is a schematic flow chart of a method for preparing a shorts-type wearing article in an embodiment of the present application, wherein the dotted line cutting process is omitted and the article is observed along the cross-sectional direction.

[0035] Fig. 7A , Figure 7B , Figure 7C They are schematic diagrams of the folding process, the temporary portion forming process and the fastening member forming process in the embodiments of the present application.

[0036] Fig. 8A , Figure 8B , Figure 8C They are schematic diagrams of the first strengthening and fixing process, the dotted line cutting process and the second strengthening and fixing process in the embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the upper, lower, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0038] The embodiment of the present application provides a method for preparing a shorts-type wearing article, which has an MD direction and a CD direction orthogonal to each other, wherein the MD direction is the equipment flow direction, the shorts-type wearing article has an outer body and a fastening member, the outer body has an easy-tear line running through the front waist or the back, the fastening member includes a substrate sheet, a hook element and a fastening member joint portion, the fastening member is configured to have a bending portion, and one of the bending portion and the easy-tear line is located at the front waist, and the other is located at the back; the preparation method comprises: a fastening member forming step: cutting the substrate continuous sheet and the folding portion continuous sheet pulled along the MD direction at the cutting line position, and rotating the cut substrate continuous sheet and the folding portion continuous sheet together in the CD direction by 90°, so that the cut and turned substrate continuous sheet and the folding portion continuous sheet form a single fastening member semi-finished product; a fastening member temporary fixing step: temporarily fixing the hook element of the fastening member semi-finished product to the outer body continuous sheet corresponding to the The non-skin side of the back part or the front waist part of the shorts-type wearing article, the outer body continuous sheet includes an easy-tear line extending along the CD direction at the front waist part or the back part corresponding to a single shorts-type wearing article; a product folding process: folding the outer body continuous sheet along the process center line corresponding to the boundary between the front part and the back part of the shorts-type wearing article; the product folding process is on the downstream side of the fastening component temporary fixing process, wherein the process center line is the reference line for preparing the shorts-type wearing article; a product sealing process: fixing the fastening component semi-finished product and the outer body continuous sheet by heat pressing or ultrasonic process, so that the outer body continuous sheet forms a pair of side sealing parts corresponding to the middle position of two adjacent shorts-type wearing articles, and forming the fastening component joint part between the fastening component semi-finished product and the outer body continuous sheet, wherein the side sealing part overlaps with the fastening component joint part in the thickness direction; the product sealing process is on the downstream side of the product folding process.

[0039] The embodiment of the present application provides a method for preparing a shorts-type wearing article. Compared with the method in the prior art where a fastening member is temporarily fixed to an outer body in a folded state by a hot-melt adhesive, the preparation method of the present application folds both sides of a substrate continuous sheet together with a hook element continuous sheet along a folding line toward the outer surface of the substrate continuous sheet to form a folded continuous sheet, and forms a fastening member semi-finished product with the substrate continuous sheet, so that the hook element of the fastening member semi-finished product is temporarily fixedly connected to the non-skin side of the back or front waist of the outer body continuous sheet corresponding to the shorts-type wearing article, thereby not only avoiding the hot-melt adhesive from adhering to the clothes or skin of the wearer, but also reducing the use of hot-melt adhesive, thereby reducing material costs and reducing the impact on the environment. On the other hand, in the preparation method of the application, the substrate continuous sheet and the folded continuous sheet pulled along the MD direction are rotated 90° in the CD direction after the cutting operation to form a single fastening member semi-finished product, so as to solve the problem that the single fastening member formation process in the prior art occupies a large amount of equipment space, thereby avoiding waste of resources.

[0040] A method for preparing a shorts-type wearing article and a corresponding shorts-type wearing article provided in the embodiments of the present application will be described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of each embodiment have their own emphases. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. In addition, with respect to the drawings, in order to explain more clearly, the width, thickness, shape, etc. of each component are sometimes schematically shown compared to the actual situation, but this is only an example and is not a limitation on the interpretation of the present application. Moreover, each drawing schematically shows an implementation method, so the size, spacing or positional relationship of each component is exaggerated or part of the component is omitted.

[0041] like Figure 1 and Figure 2 As shown, the shorts-type wearing article has a length direction, a width direction and a thickness direction which are orthogonal to each other. The length direction is the direction of the shorts-type wearing article in the unfolded state, and the width direction is orthogonal to the length direction (such as Figure 1 The thickness direction is orthogonal to the length direction and the width direction. The length direction includes the front side and the back side, the front side is the front side of the wearer when wearing the shorts-type wearing article, and the back side is the back side of the wearer when wearing the shorts-type wearing article. The thickness direction includes the skin side and the non-skin side, such as Figure 2 As shown, the skin side is the side that contacts the wearer's skin when wearing a shorts-type wearing article ( Figure 2 The upper side shown), the non-skin side is the opposite side ( Figure 2 as shown below). Figure 1As shown, the shorts-type wearing article has a front waist portion B1 disposed on the wearer's ventral part along the length direction, a back portion B2 disposed on the wearer's back part, and a crotch portion B3 disposed between the front waist portion B1 and the back portion B2 of the wearer. In the length direction, the shorts-type wearing article has a front body portion Fr and a back body portion Be disposed oppositely, the front body portion Fr corresponds to the front side of the wearer's body, and the back portion Be corresponds to the back side of the wearer's body. The side edges of the front waist portion B1 along the width direction and the side edges of the back portion B2 along the width direction are respectively sealed to form side sealing portions 41, so that the shorts-type wearing article forms a trouser-like shape with a waist opening and two leg openings. The shorts-type wearing article includes an outer body 20 and an absorbent body 10 connected to the skin side of the outer body 20. The two ends of the absorbent body 10 along the length direction overlap the front waist portion B1 and the back portion B2, respectively. In the crotch portion B3, the outer body 20 forms arc-shaped leg circumference lines 26 on both sides of the absorbent body 10, so as to better fit the leg contour of the wearer.

[0042] like Figure 2 As shown, the absorbent body 10 includes a liquid-permeable sheet 11, a liquid-impermeable sheet 12, and an absorbent core 13 disposed between the liquid-permeable sheet 11 and the liquid-impermeable sheet 12. The outer body 20 is an elastic outer elastic body, which at least includes an inner sheet 21 disposed on the side close to the wearer's skin and an outer sheet 22 disposed on the side close to the wearer's non-skin side. In one embodiment of the present application, the outer elastic body also includes a first elastic component 23 disposed between the inner sheet 21 and the outer sheet 22 and extending in the width direction. The first elastic component 23 can be an elastic material such as an artificially synthesized elastic spandex yarn, a natural rubber strip (thread), or a sheet-like elastic film. Of course, in some other embodiments, the outer elastic body only includes an inner layer sheet 21 and an outer layer sheet 22, wherein the outer layer sheet 22 is a non-stretchable non-woven fabric, and the inner layer sheet 21 is a stretchable non-woven fabric, and the stretchable non-woven fabric is layered on the skin side of the non-stretchable non-woven fabric, so that the outer elastic body has a certain elasticity.

[0043] like Figure 3 and Figure 4As shown, at the front waist B1, at both ends of the outer body 20 in the width direction, an easy tear line 24 extending in the length direction is respectively provided, and the easy tear line 24 vertically runs through the front waist B1 in the length direction. By separating (tearing) the front waist B1 in the length direction of the easy tear line 24, the front waist B1 can be separated from the back B2. After the easy tear line 24 is separated, a first end 24b close to the side seal 41 and a second end 24a away from the side seal 41 are formed. In the wearing state, along the width direction, the easy tear line 24 is provided in the area between the side seal 41 and the hook element 32 (the hook element 32 will be described in detail below) along the width direction, and the easy tear line 24 is closer to the side seal 41 than the hook element 32.

[0044] like Figure 1 As shown, the shorts-type wearing article further includes a pair of fastening members 30, which are respectively arranged on both sides of the back portion B2 along the width direction. Figure 2 As shown, the fastening member 30 includes a substrate sheet 31, a hook element 32, a fastening member engaging portion 33 and a temporary portion 34. The substrate sheet 31 and the inner layer sheet 21 (outer layer sheet 22) are both non-woven fabrics, but have different fibers. The size of the substrate sheet 31 along the length direction is smaller than the size of the side sealing portion 41, as shown in FIG. Figure 1 As shown. The outer edge of the base sheet 31 is fixed to the non-skin side of the outer layer sheet 22 located at the back B2 through the fastening member joint part 33. The fastening member joint part 33 overlaps with the side sealing part 41 along the thickness direction. Further, the fastening member joint part 33 and the side sealing part 41 can be formed by one process, that is, the fastening member joint part 33 and the side sealing part 41 are formed together by the same process. Of course, the fastening member joint part 33 and the side sealing part 41 can also be formed by two processes, that is, the fastening member joint part 33 and the side sealing part 41 are formed successively by the same or different processes.

[0045] A hook element 32 is provided at one end of the substrate sheet 31 away from the fastening member joint 33. When the bending portion 31a is formed (see the description below for details), the hook element 32 is provided on the inner side of the bending portion 31a. The two ends of the hook element 32 along the length direction extend to the outer edge of the substrate sheet 31 respectively, and are the same length as the substrate sheet 31 along the length direction. The hook element 32 is in a strip shape or a trapezoidal shape. The hook element 32 is fixed to the substrate sheet 31 by at least one of a hot pressing process and an ultrasonic process. Further, at least one of the hook element 32 and the substrate sheet 31 is coated with hot melt adhesive and bonded and fixed to each other. The gram weight of the hook element 32 is within 2 times the gram weight of the substrate sheet 31, so that the hook element 32 and the substrate sheet 31 have a better match, are easier to bond, and are more firmly bonded. The hook element 32 is used to be temporarily fixedly connected to the non-skin side of the back B2 or the front waist B1. Specifically, a plurality of small protrusions are provided on the hook element 32, and the small protrusions are used to repeatedly fit or remove with the non-skin side of the back B2 or the front waist B1. In this case, the nonwoven fabric used in the outer sheet 22 can be intertwined with the small protrusions to fit or remove with the hook element 32, thereby facilitating the wearing and taking off of the shorts-type wearing article.

[0046] Before wearing, that is, when the shorts-type clothing item is not in use, Figure 6 , Figure 7A-7C , the base sheet 31 and the hook element 32 of the fastening member 30 are folded together toward the outer surface of the base sheet 31, thereby forming a bending portion (or folding portion) 31a. When the bending portion 31a is located at the back B2 and the tear line 24 is located at the front waist B1, the bending portion 31a is located between the base sheet 31 and the outer sheet 22, so that the hook element 32 is temporarily fixedly connected to the non-skin side of the back B2 in a relaxed state, thereby improving the method of using hot melt adhesive (also called hot melt glue) in the prior art to temporarily fix the fastening member to the back. This solution can prevent the hot melt glue from adhering to the clothes or skin, while reducing the use of hot melt glue, reducing material costs, and being environmentally friendly. Of course, in some other embodiments (the bending portion 31a is located at the front waist B1, and the tear line 24 is located at the back B2), the hook element 32 can also be temporarily fixedly connected to the non-skin side of the front waist B1 in a relaxed state, thereby improving the method of temporarily fixing the fastening member to the front waist with a hot melt adhesive in the prior art. In the embodiment of the present application, the function of the hook element 32 can be maximized. Compared with the method of folding the hook element and the substrate sheet together toward the inner surface of the substrate sheet and temporarily fixing it with a hot melt adhesive, the method of folding the hook element 32 and the substrate sheet 31 together toward the outer surface of the substrate sheet 31 and temporarily fixing it with the hook element 32 in the embodiment of the present application is convenient for the wearer to grasp and use, and the bending portion 31a can be quickly released when wearing, thereby improving the wearing experience.

[0047] like Figure 1 In the illustrated embodiment, the fastening member 30 further includes a temporary portion 34, which temporarily fixes the bent substrate sheet 31 by at least one of a heat pressing process and an ultrasonic process to maintain the folded state (shape) of the fastening member 30, prevent the fastening member 30 from being spread out before packaging or use, and facilitate subsequent product packaging. When wearing the shorts-type wearing article, the hook element 32 is removed from the non-skin side of the back B2 or the front waist B1, and then the temporary portion 34 is unfolded, so that the fastening member 30 changes from the folded state to the stretched state for easy wearing.

[0048] like Figure 4 In the shown embodiment (the bending portion 31a is located at the back B2 and the tear line 24 is located at the front waist B1), when worn, the hook element 32 is removed from the back B2, so that the bending portion 31a of the fastening member 30 is released from the non-skin side of the back B2, and the tear line 24 is separated. In this case, the base sheet 31 in the stretched state is attached from the back B2 toward the front waist B1, so that the hook element 32 is removably attached to the non-skin side of the front waist B1 in the stretched state, so that the base sheet 31 wraps the side sealing portion 41 and the fastening member joint portion 33, so that the side sealing portion 41 and the fastening member joint portion 33 are hidden on the inner side of the base sheet 31, thereby making the two side edges of the shorts-type wearing article along the width direction present a seamless effect, reducing the friction between the side sealing portion 41 and the wearer's skin, thereby providing the wearer with a good touch and improving the overall wearing effect. Of course, in some other embodiments (the bending portion 31a is located at the front waist B1, and the tear line 24 is located at the back B2), when worn, the hook element 32 is removed from the front waist B1, so that the bending portion 31a of the fastening member 30 is released from the non-skin side of the front waist B1, and the tear line 24 is separated. In this case, the base sheet 31 in the stretched state is attached from the front waist B1 to the back B2, so that the hook element 32 is removably attached to the non-skin side of the back B2 in the stretched state, so that the base sheet 31 wraps the side sealing portion 41 and the fastening member joint portion 33, so that the side sealing portion 41 and the fastening member joint portion 33 are hidden on the inner side of the base sheet 31, thereby making the two side edges of the shorts-type wearing article along the width direction present a seamless effect. In addition, as Figure 3In the embodiment shown (the bending portion 31a is located at the back part B2, and the tear line 24 is located at the front waist part B1), before wearing, the base sheet 31 is temporarily fixed to the back part B2 in a folded manner, so that the base sheet 31 can be configured to a predetermined size along the width direction. When the tear line 24 is separated, the hook element 32 is attached to the non-skin side of the front waist part B1, and the base sheet 31 connects the front waist part B1 and the back part B2. In this way, by adjusting the attachment position of the hook element 32 to the non-skin side of the front waist part B1, the waist opening size of the shorts-type wearing article can be flexibly adjusted according to the wearer's use requirements. Of course, in other embodiments (the bending portion 31a is located at the front waist B1, and the easy tear line 24 is located at the back B2), before wearing, the base sheet 31 is temporarily fixed to the front waist B1 in a folded manner, so that the base sheet 31 can be configured to a predetermined size along the width direction. When the easy tear line 24 is separated, the hook element 32 is attached to the non-skin side of the back B2, and the base sheet 31 connects the front waist B1 and the back B2. In this way, by adjusting the attachment position of the hook element 32 to the non-skin side of the back B2, the waist opening size of the shorts-type wearing article can be flexibly adjusted according to the wearer's use needs.

[0049] Continue reading Figure 1 As shown, the outer body 20 at the crotch portion B3 is also provided with a second elastic component 25. The second elastic component 25 is made of spandex, or may be made of natural rubber strips (threads) or other elastic materials. The second elastic component 25 extends from the front waist portion B1 to the crotch portion B3 along an arc curve, and extends from the back portion B2 to the crotch portion B3 along an arc curve. Figure 1 As shown, the arc curve of the second elastic component 25 matches the leg opening edge of the shorts-type wearing article, so that the extended shape of the second elastic component 25 matches the arc-shaped leg circumference line 26 of the human leg edge, and better fits the wearer's leg contour.

[0050] One embodiment of the present application provides a method for preparing a shorts-type wearing article. Figure 5 and Figure 6 As shown, the preparation method includes: a substrate sheet conveying step S11, a hook element compounding step S12, a substrate continuous sheet arc cutting step S13, a folding step S14, a temporary portion forming step S15, a fastening component forming step S16, a fastening component temporary fixing step S31, a leg arc cutting step S32, a product folding step S33, a product sealing step S34 and a product cutting step S35.

[0051] The preparation method has mutually orthogonal MD and CD directions. The MD direction is the equipment flow direction, which refers to the direction when the equipment is operating normally, that is, the direction in which the products on the production line flow from upstream to downstream. The MD direction is consistent with the width direction of the shorts-type wearing article, and the CD direction is consistent with the length direction of the shorts-type wearing article. It should be noted that the shorts-type wearing article here refers to the final molded product. Figure 1 As shown, the shorts-type wearing article at least has an outer body 20 and a fastening member 30, wherein the outer body 20 has a tear line 24 that passes through the front waist B1 or the back B2, and the fastening member 30 includes a base sheet 31, a hook element 32 and a fastening member joint 33, and the fastening member 30 is configured to have a bending portion 31a, and one of the bending portion 31a and the tear line 24 is located at the front waist B1, and the other is located at the back B2. For more explanations about the specific structure of the shorts-type wearing article, please refer to the above description, which will not be described in detail here.

[0052] The various steps of the method for preparing the shorts-type wearing article of the present application will be further described below.

[0053] Base material sheet conveying step S11: A base material continuous sheet 31C is provided and conveyed in the MD direction.

[0054] Hook element compounding process S12: provided at the downstream side of the substrate sheet conveying process S11, a pair of hook element continuous sheets 32C are provided, and the hook element continuous sheets 32C are compounded on the inner surface of the substrate continuous sheet 31C, wherein the hook element continuous sheets 32C are symmetrically arranged at both ends of the substrate continuous sheet 31C along the CD direction. The length of the hook element continuous sheet 32C along the MD direction is consistent with the length of the substrate continuous sheet 31C along the MD direction; the hook element continuous sheet 32C is fixed on the substrate continuous sheet 31C by at least one of a hot pressing process and an ultrasonic process; further, at least one of the hook element continuous sheet 32C and the substrate continuous sheet 31C is coated with hot melt adhesive and bonded and fixed to each other.

[0055] The process of arc cutting the substrate continuous sheet S13 is optional and is arranged between the hook element compounding process S12 and the folding process S14. The process of arc cutting the substrate continuous sheet S13 includes: performing arc cutting on the substrate continuous sheet 31C located outside the hook element continuous sheet 32C along the CD direction, so that the outer edge of the substrate continuous sheet 31C forms an arc structure. It should be noted that when the substrate continuous sheet 31 is arc cut, part of the hook element continuous sheet 32C can also be cut. Of course, in some other embodiments, the process of arc cutting the substrate continuous sheet S13 may not be performed, and the outer edge of the substrate continuous sheet 31C along the CD direction may be a straight line structure.

[0056] Folding step S14: located at the downstream side of the hook element compounding step S12 or the downstream side of the base material continuous sheet arc cutting step S13, such as Fig. 7A As shown, the folding process S14 is to fold the two sides of the substrate continuous sheet 31C along the CD direction and the hook element continuous sheet 32C together along the folding line extending along the MD direction toward the outer surface of the substrate continuous sheet 31C to form a folded portion continuous sheet 31aC, wherein the folded portion continuous sheet 31aC is symmetrically located at both ends of the substrate continuous sheet 31C along the CD direction; in the embodiment of the present application, the hook element 32 and the substrate sheet 31 are folded together toward the outer surface of the substrate sheet 31 and the hook element 32 is temporarily fixed to facilitate the wearer's grasping and use, and the bent portion 31a can be quickly released when worn.

[0057] Temporary part forming step S15: This step is provided between the folding step S14 and the fastening member forming step S16. Figure 7B As shown, this process joins the substrate continuous sheet 31C and the folded portion continuous sheet 31aC by at least one of a heat pressing process or an ultrasonic process to form a plurality of discontinuous temporary portions 34, and the temporary portions 34 have overlapping portions with the hook element continuous sheet 32C, so that the folded portion continuous sheet 31aC is temporarily fixed on the substrate continuous sheet 31C to prevent the substrate continuous sheet 31C from becoming loose before being compounded with the outer body continuous sheet 20C, thereby facilitating the subsequent packaging of the product into bags.

[0058] Fastening member forming step S16: Figure 7C As shown, at the cutting line L1 position, the substrate continuous sheet 31C and the folding portion continuous sheet 31aC pulled along the MD direction are cut, and the cut substrate continuous sheet 31C and the folding portion continuous sheet 31aC are rotated 90° in the CD direction together, so that the cut and turned substrate continuous sheet 31C and the folding portion continuous sheet 31aC form a single fastening component semi-finished product 30P, thereby solving the problem in the prior art, that is, in the process of forming a single fastening component, the hook element continuous sheet is compounded with the substrate continuous sheet, and then cut at the cutting line position, without being rotated 90°, and directly compounded with the outer body continuous sheet, resulting in a large amount of equipment space being occupied. Through the above implementation, the present application can save equipment space and effectively avoid waste of resources.

[0059] The process S31 of temporarily fixing the fastening member: temporarily fixing the hook element 32 of the semi-finished fastening member 30P to the non-skin side of the back B2 or the front waist B1 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article, and the outer body continuous sheet 20C includes a tear line 24 extending along the CD direction at the front waist B1 or the back B2 corresponding to a single shorts-type wearing article. The present application can overcome the problems caused by the previous temporary fixing method using hot melt adhesives by temporarily fixing the hook element 32 to the outer body continuous sheet 20C before the shorts-type wearing article is used. Moreover, the present application cleverly expands the use function of the hook element and reduces the adhesion of hot melt adhesives to clothing. In addition, the present application also reduces the use of hot melt adhesives, reduces material production costs, and reduces the impact on the environment.

[0060] The leg arc cutting step S32 is provided between the fastening member temporary fixing step S31 and the product folding step S33. The leg arc cutting step S32 includes: cutting the outer body continuous sheet 20C corresponding to the two sides of the absorbent body 10 along the MD direction into an arc shape to form an arc leg circumference line 26.

[0061] Product folding step S33: fold the outer body continuous sheet 20C along the process center line corresponding to the boundary between the front part Fr and the back part Be of the shorts-type wearing article. This step is on the downstream side of the fastening member temporary fixing step S31, wherein the process center line is the reference line CL for preparing the shorts-type wearing article, which can be referred to in Figure 1 The baseline CL in .

[0062] Product sealing process S34: This process is located at the downstream side of the product folding process S33. This process at least includes: fixing the fastening member semi-finished product 30P and the outer body continuous sheet 20C by hot pressing or ultrasonic process, so that the outer body continuous sheet 20C forms a pair of side sealing parts 41 corresponding to the middle position of two adjacent shorts-type wearing articles, and forming a fastening member joint part 33 between the fastening member semi-finished product 30P and the outer body continuous sheet 20C, wherein the side sealing part 41 overlaps with the fastening member joint part 33 in the thickness direction. Further, in one embodiment of this process, the fastening member joint part 33 and the side sealing part 41 can be formed by one process, that is, the fastening member joint part 33 and the side sealing part 41 are formed together by the same process. Specifically, the outer body continuous piece 20C folded in half by the product folding process S33 is sealed together with the fastening member semi-finished product 30P at the middle position of the corresponding two adjacent shorts-type wearing articles (or the middle position of the fastener semi-finished product 30P) by at least one of a hot pressing process or an ultrasonic process. In another embodiment of this process, the fastening member joint 33 and the side sealing part 41 can also be formed by two processes, that is, the fastening member joint 33 and the side sealing part 41 are successively formed by the same or different processes. Specifically, the outer body continuous piece 20C folded in half by the product folding process S33 is first sealed to form the side sealing part 41 at the middle position of the corresponding two adjacent shorts-type wearing articles, and then the side sealing part 41 is fixedly connected to the fastening member semi-finished product 30P, thereby forming the fastening member joint 33. Therefore, when executing this process, it can be determined according to actual conditions.

[0063] Product cutting step S35: This step is located downstream of the product sealing step S34. This step at least includes: cutting the fastening member semi-finished product 30P and the outer body continuous sheet 20C along the middle area of ​​the pair of side seals 41 (or the fastening member semi-finished product 30P) to form a single shorts-type wearing article having a pair of fastening members 30.

[0064] On the upstream side of the above-mentioned product folding step S33, the preparation method of the present application further includes a dotted line cutting step S22. Figure 8BAs shown, the dotted line cutting process S22 includes: performing a dotted line cutting operation on both sides of the front waist B1 or the back B2 of a single shorts-type wearing article corresponding to the outer body continuous sheet 20C along the MD direction, so that the single shorts-type wearing article forms an easy-tear line 24 extending along the CD direction. The easy-tear line 24 in this embodiment is arranged at the front waist B1. Moreover, on the downstream side of the product folding process S33, the orthographic projection of the easy-tear line 24 along the thickness direction is located in the area between the side sealing portion 41 and the bending portion 31a along the MD direction. In addition, the formation of the easy-tear line 24 can be achieved by one dotted line cutting process S22 or two dotted line cutting processes S22. Specifically, when one dotted line cutting process S22 is adopted, two easy-tear lines 24 extending along the CD direction are respectively formed on both sides of the front waist B1 or the back B2 of two adjacent shorts-type wearing articles corresponding to the outer body continuous sheet 20C along the MD direction, as shown in FIG. Figure 8B When two dotted line cutting steps S22 are used, one dotted line cutting step S22 forms an easy tear line 24 on one side of the front waist B1 of the outer body continuous sheet 20C corresponding to the single wearing article along the CD direction, and the other dotted line cutting step S22 forms another easy tear line 24 on the other side of the front waist B1 of the outer body continuous sheet 20C corresponding to the single wearing article along the CD direction.

[0065] On the upstream side of the dotted line cutting step S22, the preparation method of the present application further includes a first strengthening and fixing step S21. Fig. 8A As shown, the first reinforcing and fixing process S21 includes: forming a first reinforcing and fixing area P1 on both sides of the easy tearing line 24 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article at the front waist B1 or the back B2 by at least one of hot melt adhesive, hot pressing and ultrasonic process. In this embodiment, the first reinforcing and fixing area P1 is set at the front waist B1. By setting the first reinforcing and fixing area P1, the first elastic component 23 can be prevented from shrinking in the width direction on both sides of the easy tearing line 24.

[0066] On the upstream side of the dotted line cutting step S22, the preparation method of the present application further includes a second strengthening and fixing step S21a. Figure 8CAs shown, the second reinforcement fixing process S21a includes: forming a second reinforcement fixing area P2 in the area of ​​the outer body continuous sheet 20C corresponding to the shorts-type wearing article located at the back B2 or the front waist B1 and corresponding to the single fastening member semi-finished product 30P by at least one of hot melt adhesive, hot pressing and ultrasonic process. In this embodiment, the second reinforcement fixing area P2 is set at the back waist B2. Among them, one of the second reinforcement fixing area P2 and the first reinforcement fixing area P1 is located at the front waist B1 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article, and the other is located at the back B2 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article. That is, when the first reinforcement fixing area P1 is located at the front waist B1 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article, the second reinforcement fixing area P2 is located at the back B2 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article. When the first reinforcing fixing area P1 is located at the back B2 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article, the second reinforcing fixing area P2 is located at the front waist B1 of the outer body continuous sheet 20C corresponding to the shorts-type wearing article. By providing the second reinforcing fixing area P2, the delamination of the outer layer sheet 22 and / or the retraction of the elastic member when the hook element 32 is removed from the non-skin side of the outer body 20 can be prevented.

[0067] It should be noted that the preparation method of the present application also includes an outer body forming process and an inner compounding process (not shown in the figure). Among them, the outer body forming process is used to form an outer body continuous sheet 20C. Specifically, the outer body forming process includes: compounding a first continuous sheet, a second continuous sheet and a plurality of first continuous elastic members to form an outer body continuous sheet 20C transported along the MD direction, and the outer body continuous sheet 20C corresponds to the front waist B1, crotch B3, and back B2 of the shorts-type wearing article along the CD direction. Among them, the first continuous sheet and the second continuous sheet are respectively used to form one of the outer layer sheet 22 and the inner layer sheet 21, and the first continuous elastic member is used to form the first elastic member 13. And the inner compounding process includes: compounding the absorbent body 10 on the inner surface of the outer body continuous sheet 20C transported along the MD direction.

[0068] The above is a detailed introduction to the preparation method of a shorts-type wearing article provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for preparing a shorts-type wearing article having an MD direction and a CD direction orthogonal to each other, wherein: MD direction is the flow direction of the equipment, characterized in that the shorts-type wearing article has an outer body and a fastening member, the outer body has an easy-tear line running through the front waist or the back, the fastening member includes a base sheet, a hook element and a fastening member joint portion, the fastening member is configured to have a bending portion, and one of the bending portion and the easy-tear line is located at the front waist, and the other is located at the back; The preparation method comprises: The fastening member forming step includes: cutting the base material continuous sheet and the folded portion continuous sheet pulled in the MD direction at the cutting line position, and rotating the cut base material continuous sheet and the folded portion continuous sheet together in the CD direction by 90 degrees, so that the cut and turned base material continuous sheet and the folded portion continuous sheet form a single fastening member semi-finished product; A step of temporarily fixing a fastening member: temporarily fixing the hook element of the semi-finished fastening member to a non-skin side of an outer body continuous sheet corresponding to the back or front waist of the shorts-type wearing article, wherein the outer body continuous sheet includes an easy tear line extending along the CD direction at the front waist or the back corresponding to a single shorts-type wearing article; A product folding step: folding the outer body continuous sheet along the process center line corresponding to the boundary between the front part and the back part of the shorts-type wearing article; the product folding step is on the downstream side of the fastening member temporary fixing step, wherein the process center line is the reference line for preparing the shorts-type wearing article; Product sealing process: fix the fastening component semi-finished product and the outer body continuous sheet by heat pressing or ultrasonic process, so that the outer body continuous sheet forms a pair of side sealing parts corresponding to the middle position of two adjacent shorts-type wearing articles, and forms the fastening component joint part between the fastening component semi-finished product and the outer body continuous sheet, wherein the side sealing part overlaps with the fastening component joint part in the thickness direction; the product sealing process is on the downstream side of the product folding process.

2. The preparation method according to claim 1, characterized in that On the upstream side of the fastening member forming step, the preparation method further includes: A substrate sheet conveying step: providing a substrate continuous sheet and conveying the substrate continuous sheet along the MD direction; A hook element compounding process is provided at the downstream side of the substrate sheet conveying process, providing a pair of hook element continuous sheets, and compounding the hook element continuous sheets on the inner surface of the substrate continuous sheet, wherein the hook element continuous sheets are symmetrically arranged at both ends of the substrate continuous sheet along the CD direction; Folding process: located on the downstream side of the hook element compounding process, the folding lines extending along the MD direction along both sides of the base material continuous sheet and the hook element continuous sheet are folded toward the outer surface of the base material continuous sheet to form a folded portion continuous sheet, and the folded portion continuous sheet is symmetrically located at both ends of the base material continuous sheet along the CD direction.

3. The preparation method according to claim 2, characterized in that: The preparation method also includes: a temporary portion forming process, which is arranged between the folding process and the fastening member forming process, and the temporary portion forming process includes joining the base material continuous sheet and the folding portion continuous sheet through a hot pressing process or an ultrasonic process to form a plurality of discontinuous temporary portions, so that the folding portion continuous sheet is temporarily fixed on the base material continuous sheet.

4. The preparation method according to claim 3, characterized in that: The tentative portion has an overlapping portion with the hook element continuous sheet.

5. The preparation method according to claim 2, characterized in that: The preparation method also includes: an arc-shaped cutting process for the substrate continuous sheet, which is arranged between the hook element compounding process and the folding process, and the arc-shaped cutting process for the substrate continuous sheet includes performing arc-shaped cutting on the substrate continuous sheet located outside the hook element continuous sheet so that the outer edge of the substrate continuous sheet forms an arc-shaped structure.

6. The preparation method according to claim 1, characterized in that: The preparation method also includes: a leg arc cutting process, which is arranged between the fastening component temporary fixing process and the product folding process, and the leg arc cutting process includes cutting the parts of the outer body continuous sheet corresponding to the absorbent body on both sides along the MD direction into an arc to form an arc-shaped leg circumference line.

7. The preparation method according to claim 1, characterized in that: The manufacturing method further includes, on the downstream side of the product sealing step: a product cutting step of cutting the semi-finished fastening member product and the outer body continuous sheet along the middle area of ​​the pair of side sealing portions.

8. The method for producing a shorts-type wearing article according to claim 1, wherein: In the product sealing process, the side sealing portion and the fastening member engaging portion are formed together by using the same process, or are formed successively by using the same or different processes.

9. The method for producing a shorts-type wearing article according to claim 1, wherein: On the upstream side of the product folding process, the preparation method also includes: a dotted line cutting process: performing a dotted line cutting operation on both sides of the outer body continuous sheet corresponding to the front waist or back of a single shorts-type wearing article along the MD direction, so that the single shorts-type wearing article forms the easy-tear line extending along the CD direction.

10. The method for producing a shorts-type wearing article according to claim 1, wherein: On the downstream side of the product folding process, the orthographic projection of the easy tear line along the thickness direction is located in the area between the side sealing portion and the bending portion along the MD direction.

11. The method for producing a shorts-type wearing article according to claim 9, wherein: On the upstream side of the dotted line cutting process, the preparation method also includes: a first reinforcement fixing process: by using at least one of hot melt adhesive, heat pressing and ultrasonic processing, a first reinforcement fixing area is formed on both sides of the tear line of the outer body continuous sheet corresponding to the shorts-type wearing article located at the front waist or the back.

12. The method for producing a shorts-type wearing article according to claim 11, wherein: On the upstream side of the dotted line cutting process, the preparation method also includes: a second reinforcement and fixing process: by using at least one of a hot melt adhesive, hot pressing and ultrasonic process, a second reinforcement and fixing area is formed in an area of ​​the outer body continuous sheet corresponding to the shorts-type wearing article located at the back or the front waist and corresponding to the single fastening component semi-finished product, wherein one of the second reinforcement and fixing area and the first reinforcement and fixing area is located at the front waist of the outer body continuous sheet corresponding to the shorts-type wearing article, and the other is located at the back of the outer body continuous sheet corresponding to the shorts-type wearing article.

13. The method for producing a shorts-type wearing article according to claim 1, wherein: The preparation method further comprises: an outer body forming step: compounding the first continuous sheet, the second continuous sheet and a plurality of first continuous elastic members to form an outer body continuous sheet transported along the MD direction.

14. The method for producing a shorts-type wearing article according to claim 13, wherein: The preparation method further comprises an inner compounding step of compounding the absorbent body onto the outer body continuous sheet conveyed along the MD direction.

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