Trousers-shaped hygienic product and processing method thereof

Abstract

The invention discloses a pants-shaped hygienic product and a processing method thereof, relates to the technical field of hygienic product processing, and solves the technical problem that when O-shaped cutting is carried out through an existing laser, non-woven fabric at the cutting edge is hardened while it is guaranteed that a rubber band is cut off. The method comprises the following specific steps that spot breaking treatment is conducted on the elastic component in a first area, and the elastic component subjected to spot breaking generates displacement towards a second area; and the displaced elastic component is fixed to the outer side of the laser cutting track line through the second area, so that the elastic component and the laser cutting track line have no physical intersection. The method comprises the following steps: applying a buttock rubber band in an intermittent glue applying manner to form an avoiding relationship with an O-cutting position, and then performing rubber band point breaking treatment in a region where the rubber band and laser cutting possibly interfere with each other to form an avoiding region; the non-woven fabric is cut only during laser O-cutting, the hygienic product produced through the method is low in edge crystallinity and good in touch hand feeling, and the wearing comfort is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of hygiene product processing technology, specifically to a trouser-type hygiene product and its processing method. Background Technology

[0002] Pants-style hygiene products refer to items with a pants-like structure and absorbent function, such as baby diapers and adult incontinence pants. Taking baby diapers as an example, they absorb and store a child's excrement after being worn by a growing child. In pants-style absorbent items (such as pull-ups, training pants, and adult incontinence pants), elastic components are the core functional elements that ensure a close fit and prevent leakage. They are usually laminated to the waistband, leg openings, etc., providing continuous elastic contraction to ensure the item conforms to the body's curves during wear and activity.

[0003] Currently, the outer casing is composed of multiple layers of material and elastic components. During manufacturing, laser cutting (such as using a carbon dioxide laser) is typically employed to cut the leg openings of the outer casing. However, this process simultaneously cuts non-woven fabrics and elastic components (such as rubber bands), leading to a high degree of crystallization at the cut edges.

[0004] For example, patent document 1CN206764155U discloses a laser arc forming device for diapers. By controlling the laser emission time of the laser generator through a signal receiver inside the laser generator, the arc drawn by the laser is controlled, and the laser is used to cut the diaper. This solves the problems of uneven cutting edges, high noise, and multiple times of blade re-sharpening caused by using an arc blade for cutting. Patent document 2CN111603314B discloses an anti-pulling pull-up trousers and its manufacturing process. It uses a point-break method to reduce the loss of elasticity in the part of the elastic sheet covering the absorbent body, so as to solve the problems of perforation, irregular wrinkles and poor appearance caused by the broken elastic band of the waistband of the three-piece pull-up trousers. Summary of the Invention

[0005] The purpose of this invention is to provide a trouser-type sanitary product and its processing method, solving the following technical problems: Although carbon dioxide laser cutting of materials can achieve high processing efficiency, it easily generates a large heat-affected zone, resulting in a high degree of crystallization at the cut edges of the product (elastic band), poor tactile feel, and even easy skin scratches, making it unsuitable for skin contact. Therefore, intermittent adhesive application and point-cutting of the elastic band are used to form a first area in the buttock region, so that the laser only cuts the non-woven fabric during the cutting process; Patent Document 2 describes the use of point-cutting method, but the application areas, purposes, and solutions of the two are different.

[0006] The objective of this invention can be achieved through the following technical solutions: A processing method for trouser-style sanitary products, employing laser O-cutting technology, cuts a material width along a laser cutting trajectory line to form a closed leg opening, including the following steps: A second region is pre-set on the elastic component outside the laser cutting trajectory line of the material width and intersecting the laser cutting trajectory line, so that the elastic component forms a first region inside the laser cutting trajectory line; The elastic component in the first region is subjected to point breakage, and the broken elastic component generates a displacement toward the second region. The second region fixes the displaced elastic component to the outside of the laser cutting trajectory line, so that the elastic component and the laser cutting trajectory line have no physical intersection.

[0007] As a further aspect of the present invention: a fixed base point is formed at the end of the second region near the retraction end of the elastic component to achieve the consolidation of the elastic component and the nonwoven fabric, and to restrict the elastic component after the point breakage treatment to the outside of the laser cutting trajectory line.

[0008] As a further aspect of the present invention, the elastic component includes, but is not limited to, any one or more of elastic bands, elastic membranes, elastic mesh fabrics, or elastic strips.

[0009] As a further aspect of the present invention: the material web is continuously conveyed, and the material web includes at least an outer casing.

[0010] As a further aspect of the present invention, the point breakage treatment adopts ultrasonic point breakage or mechanical point breakage method.

[0011] As a further aspect of the present invention: the elastic component is formed into a break point after being subjected to a point break treatment, the first distance between the break point and the intersection point of the laser cutting trajectory line and the elastic component is L1, the second distance between the break point and the fixed base point is L2, wherein L2 > L1.

[0012] As a further aspect of the present invention: the distances from all the fixed base points to their corresponding intersection points are equal.

[0013] As a further aspect of the present invention: the laser used in the laser O-cutting technology is a picosecond pulse laser.

[0014] As a further aspect of the present invention: a vision system is used to identify a predetermined laser cutting trajectory line in order to control the position of the laser or elastic component.

[0015] As a further aspect of the present invention: a trouser-type sanitary product, comprising: The outer body has a waist opening and two leg openings; Elastic components are disposed within the outer casing and are symmetrically distributed about the longitudinal centerline of the outer casing; The second region is located on an elastic component outside the laser cutting trajectory line of the material width and intersecting with the laser cutting trajectory line, such that the elastic component forms a first region inside the laser cutting trajectory line; the second region is used to fix the elastic component after point breaking in the first region outside the laser cutting trajectory line.

[0016] As a further embodiment of the present invention: the outer body includes an outer nonwoven fabric and an inner nonwoven fabric, the outer nonwoven fabric and the inner nonwoven fabric are integrally composite molded, and the elastic component is disposed between the outer nonwoven fabric and the inner nonwoven fabric.

[0017] As a further aspect of the present invention: the elastic components in the second region are at the same distance from the laser cutting trajectory line.

[0018] The beneficial effects of this invention are: In this invention, intermittent adhesive application is first used in the second region to form a first region that avoids the O-cut position. Then, the elastic band is point-cut in the first region to form an avoidance zone. This ensures that when the laser O-cut is performed, only the non-woven fabric is cut, and the elastic band is not cut. This ensures that the leg opening cut edge is smooth, burr-free, and free of melt hardening, which significantly improves the appearance and quality of the product.

[0019] This invention cleverly utilizes the high elasticity of the rubber band during the point-cutting process, causing it to retract into a second region. Within this second region, the resilient rubber band is precisely guided and fixed through intermittent glue application. By coordinating these two process steps, waste products caused by rubber band interference are eliminated at the source. Furthermore, it can be used in conjunction with a picosecond pulse laser to further reduce the crystallization of the cutting edge, thereby improving process efficiency and product quality.

[0020] This invention pre-emptively eliminates interference in the laser path through intermittent adhesive application and elastic band point breaking. Traditional laser cutting processes, when dealing with multi-layered composite materials (such as non-woven fabrics, films, and elastomers), require complex coordination and optimization of laser parameters (such as power, pulse frequency, and scanning speed) due to significant differences in the optical and thermophysical properties (such as absorptivity, melting point, and thermal conductivity) of each layer. This process necessitates repeated trials to balance cutting quality (smooth kerf, no slag) with avoiding damage to sensitive materials (such as melting or charring of elastomers), resulting in a narrow process window and high debugging costs. In contrast, this invention, through its elastic component avoidance design, ensures that the area penetrated by the laser cutting trajectory consists only of a single substrate (i.e., the material width) at the moment of cutting, with the elastic component pre-removed outside the processing area. Therefore, laser parameters only need to be uniquely matched to the optimal cutting characteristics of this substrate, ensuring continuous stability in the production process. This improves product quality and production efficiency while reducing costs associated with equipment debugging and material loss, achieving cost reduction and efficiency improvement. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram showing the first and second regions of the present invention; Figure 2 This is a schematic diagram of the closed laser cutting trajectory line of the present invention; Figure 3 This is a schematic diagram of the elastic band retraction length of the present invention; Figure 4 This is a schematic diagram showing that the line connecting the fixed base points of the present invention is parallel to the laser cutting trajectory line; Figure 5 This is a schematic diagram showing the regional distribution of the trouser-shaped sanitary products of the present invention; Figure 6 This is a schematic diagram of the material preparation structure of the present invention; Figure 7 This is a schematic diagram of the intermittent adhesive application structure of the present invention; Figure 8 This is a schematic diagram showing the structure of the elastic band breakage area of ​​the present invention; Figure 9 This is a schematic diagram of the elastic band point breakage structure of the present invention; Figure 10 This is a partial structural schematic diagram of the intermittent adhesive application of the present invention; Figure 11 This is a partial structural diagram of the elastic band point breakage of the present invention. Figure 12 This is a schematic diagram of the process flow of the present invention; Figure 13This is a structural schematic diagram of the trouser-type sanitary product of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 This embodiment provides a processing method for trouser-type sanitary products, used to produce products such as... Figure 13 The shown are pant-style sanitary products, similar to pull-up diapers; specifically: like Figure 1 As shown: A second region is preset on the elastic component outside the laser cutting trajectory line of the material width and intersecting with the laser cutting trajectory line (there are many elastic components outside the laser cutting trajectory line, but elastic components that do not intersect with it or do not interfere with it do not need to be processed), so that the elastic component forms a first region inside the laser cutting trajectory line; it should be noted that the end of the second region near the retracted end of the elastic component is defined as a fixed base point. Ideally, the fixed base point in the second region can be infinitely close to the laser cutting trajectory line. However, in actual production operations, after the elastic component breaks, it will retract and stay on the side of the fixed base point near the laser cutting trajectory line. If the fixed base point and the laser cutting trajectory line are set to coincide, the retracted elastic component may interfere with the laser cutting. There is no situation where the fixed base point of the second region is on the laser cutting trajectory line. Generally, it is set near the outside of the laser cutting trajectory line. The elastic component in the first region is subjected to point breakage, and the elastic component after point breakage is displaced toward the second region. The displaced elastic component is fixed outside the laser cutting trajectory line through the second region, so that the elastic component and the laser cutting trajectory line have no physical intersection (during the laser cutting process, there is no physical contact or intersection between the elastic component and the laser cutting trajectory line, that is, the two are completely separated and do not interfere with each other).

[0025] In this embodiment, as Figure 2 As shown, the area inside the closed trajectory line is defined as the inner side of the laser cutting trajectory line, and the area outside the closed trajectory line is defined as the outer side of the laser cutting trajectory line. In this embodiment, the elastic component is a rubber band; in addition to using a rubber band, it can also be any one or more of an elastic membrane, an elastic mesh fabric, or an elastic band.

[0026] In the second area, intermittent adhesive application can be used to form an adhesive tape, fixing the elastic band to the tape after it retracts. It can also be formed using various methods such as ultrasonic fixing, mechanical hot pressing, ultrasonic + auxiliary adhesive application (auxiliary adhesive can be applied evenly at intervals within the elastic band, or only at both ends), and mechanical hot pressing + auxiliary adhesive application. For example, ultrasonic fixing utilizes the high-frequency vibration generated by an ultrasonic generator, with the welding head and bottom roller working together to form a fixation through ultrasonic technology, primarily to ensure the elastic band is bonded to the material width.

[0027] The present invention employs intermittent adhesive application in the second region and point-cutting with elastic bands in the first region, proactively pre-setting a non-adhesive first region to avoid cutting; during the cutting process, it avoids cutting the elastic element and directly cuts the non-woven fabric; ensuring that the leg opening cut edge is smooth, burr-free, and free from melting and hardening.

[0028] In this embodiment, as Figures 1 to 4 As shown, the fixed base point in the second region is used to prevent the elastic component from retracting to the inside of the laser cutting trajectory line after the point breakage process.

[0029] Specifically, using the horizontal dimension as a uniform description, the elastic component forms point breaks after point breakage processing. The first distance between the point breakage and the intersection point of the laser cutting trajectory line and the elastic component is L1 (the minimum retraction length), and the second distance between the point breakage and the fixed base point is L2, where L2 > L1; the distances between all the fixed base points and their corresponding intersection points are equal, that is, the line connecting the fixed base points is parallel to the laser cutting trajectory line.

[0030] In a preferred embodiment, the layout of the fixed base points is optimized to ensure the comfort and aesthetics of the final product's leg circumference. Specifically, along a preset laser cutting trajectory line, the distances (defined as L2-L1) between all the fixed base points and their corresponding intersection points of the laser cutting trajectory line and the elastic component are set to be equal. During processing, after the elastic component is cut, its retracted end will be pulled towards and fixed to the fixed base point under the action of elastic restoring force. Since the distances L2-L1 between each fixed base point and the laser cutting trajectory line are equal, this means that after the retracted ends of all elastic components are fixed, the final distance between them and the laser cutting trajectory line is equal. Subsequently, the laser cuts along the trajectory line to form a closed leg circumference opening. The retracted ends of the elastic components fixed outside the trajectory line will naturally be located at the edge of the leg circumference opening after the product is formed. Since their initial distances to the cut edge (i.e., L2-L1) are consistent, the "skirt" effect formed by the retraction under elastic action will also be uniform. This design fundamentally avoids quality problems such as inconsistent width and tightness of the leg skirt due to deviation in the position of the fixing point, thus ensuring the uniformity of the product's leg circumference elasticity, consistency of appearance, and wearing comfort.

[0031] It should be noted that, ideally, all L2-L1 should be exactly equal to ensure that after each elastic component retracts, its end remains absolutely equidistant from the future leg circumference cutting edge. However, considering the realities of high-speed continuous production processes, such as minute fluctuations in material tension, the precision of guide roller operation, and instantaneous deformation during fixing, achieving absolute equality of all L2-L1 in actual production is extremely difficult and costly. Therefore, in the embodiments of this invention, a small, acceptable process tolerance range is allowed for L2-L1. Through precise mechanical design and process control, it is ensured that the lengths of all L2-L1 are substantially consistent, i.e., their values ​​are distributed within an extremely narrow deviation band.

[0032] Example 2 Please see Figures 5 to 12 As shown, it includes the following steps: S101: Material Preparation like Figure 6 As shown, a continuous inner nonwoven fabric and an outer nonwoven fabric are provided; S102: Intermittent application of adhesive Elastic bands for the hip area and waistband are applied along the flow direction between the inner and outer nonwoven fabric layers (e.g., ...). Figure 5 As shown), a material web is formed; then the inner body (absorbent core) is composited; In the hip area of ​​the material width, such as Figure 5 and Figure 7As shown, five tapes are applied intermittently using an intermittent adhesive application device (the number of tapes can be adjusted according to actual needs and is not subject to specific limitations). Figure 7 The wavy shape is only used to indicate the area to be glued, so that a first area is formed inside the predetermined laser cutting trajectory line, and a second area is formed in the hip area outside the laser cutting trajectory line. S103: Elastic band point breakage At the location corresponding to the first region, the five elastic bands in the hip area are point-cut using a mechanical process (e.g., by using a mechanical blade), such as... Figure 8 and Figure 11 As shown, the upper and lower ends of the inner side of the laser cutting trajectory line are the elastic band breakage area; after the breakage, the end of the elastic band in the buttock area retracts under the elastic action, retracts to the buttock area behind the outer side of the laser cutting trajectory line, and is fixed to the buttock area outside the laser cutting trajectory line by the tape formed by intermittent glue application; thus forming a completely elastic band-free avoidance area on the laser O-cut trajectory. S104: Laser O-cut forming A carbon dioxide laser is used to perform laser circumferential cutting (O-cut) on the first area of ​​the buttocks within the laser cutting trajectory line of the material width. Since the buttock elastic band has retracted and fixed to the outer side of the laser cutting trajectory line after the point break, the carbon dioxide laser will only cut the non-woven fabric at this time, without the buttock elastic band (spandex filament), ensuring smooth cutting. The positioning mark on the product is captured in real time by the CCD vision positioning system, and the laser beam is controlled to cut along the predetermined laser O-cut trajectory, thereby forming a smooth and closed leg opening. It should be noted that when dealing with narrow-crotch products, after the inner and outer non-woven fabrics and elastic components are combined into a material width (outer body), laser O-cutting is performed, and then the inner body is combined.

[0033] S105: Subsequent processing The continuous product chain that has completed the O-cut is cut into individual products by a slitting device. The welding wheel mechanism and cutting knife mechanism described in announcement number CN222697942U or the welding and cutting composite mechanism described in announcement number CN111572030A can be used. The products are then folded and packaged to obtain finished trouser-type sanitary products.

[0034] In this embodiment: Currently, fabric laser slitting processes generally use carbon dioxide lasers. Although using this type of laser for material slitting can achieve high processing efficiency, it is prone to generating significant heat effects, resulting in a high degree of crystallization at the slitting edges of the product, poor tactile feel, and even easy skin scratches, making it unsuitable for skin contact. Therefore, intermittent application of elastic bands is used in the second area; and the elastic bands are point-cut in the first area where they may interfere with laser cutting. The retracted elastic bands are fixed in the second area outside the laser cutting trajectory line, so that during the laser cutting process, only the non-woven fabric is being cut.

[0035] In this embodiment, the core solution is as follows: Intermittent adhesive application and elastic band fixation: The elastic band for the buttocks is bonded using an intermittent adhesive application method, forming a first adhesive-free area on the buttocks inside the laser-cut trajectory line. Especially near the point-cut area, the distribution of adhesive dots through intermittent application ensures that after the elastic band retracts from the point-cut area, both ends are firmly fixed to a second adhesive area on the buttocks outside the laser-cut trajectory line. Furthermore, the distance of the intermittent adhesive application ensures that the retraction of the elastic band is controllable and directional.

[0036] 2. Pre-cutting and elastic retraction: Before the laser cutting process, the elastic band (spandex yarn) is pre-cut in the first area (the elastic band pre-cutting area). Utilizing the high elasticity of the spandex yarn, it naturally retracts at the cut point, thus forming a "unreinforced area" or "weakened area" on the elastic band, creating a "gap space".

[0037] 3. Laser O-cut and Interference-free forming: Based on the "avoidance space" created in the first two steps, laser O-cut is then performed. At this time, when the laser beam cuts the substrate such as non-woven fabric along the preset closed path, the stretched part of the elastic band has retracted away from the laser cutting trajectory line, thus achieving interference-free and clean cutting, completely avoiding the problems of fraying or incomplete cutting caused by spandex fibers.

[0038] Example 3 The difference between this embodiment and Embodiment 2 is the use of a picosecond pulsed laser. The advantage of picosecond lasers lies in their physical mechanism of action; their interaction with materials is fundamentally different from that of carbon dioxide lasers. Picosecond laser pulses have a duration far shorter than the time required for heat to diffuse from the material to its surroundings. Energy is absorbed by the material in an extremely short time, causing instantaneous vaporization. This process removes material before heat can be conducted to the surrounding area, reducing the degree of crystallization at the cut edge. In contrast, the continuous or longer pulses of CO2 lasers allow sufficient time for energy to diffuse as heat, resulting in heated surrounding material and a larger heat-affected zone, which is more prone to carbonization. Based on actual needs, the performance parameters of the picosecond pulsed laser were adjusted so that it could only cut non-woven fabric. This laser effectively prevents crystallization at the fabric cutting edges, resulting in a smooth cut surface; however, it cannot cut elastic bands. Combining this picosecond pulsed laser with the above process makes the resulting laser-cut trousers more comfortable and skin-friendly. It should be noted that in existing technologies, when using a picosecond pulsed laser to cut both elastic bands and non-woven fabric simultaneously, the laser parameters are increased. This can lead to a hardening of the non-woven fabric at the cutting edge while cutting the elastic band. Therefore, we first adopted an intermittent adhesive application method, where the laser O-cut only cuts the non-woven fabric. This allows us to lower the laser parameters and reduce the probability of crystallization and hardening of the non-woven fabric.

[0039] Example 4 See Figure 1 and Figure 13 As shown, a type of trouser-shaped sanitary product is obtained by processing according to the processing method of Example 1, 2, or 3: Outer body 1 has a waist opening and two leg openings; The elastic component 102 is disposed inside the outer casing 1; In this embodiment, the elastic components 102 are also symmetrically distributed about the longitudinal centerline of the outer casing 1; the specific number of elastic components 102 is adjusted according to actual product requirements and is not specifically limited. The second region 103 is disposed on the elastic member outside the laser cutting trajectory line of the material width and intersecting the laser cutting trajectory line, such that the elastic member forms a first region 104 inside the laser cutting trajectory line; the elastic member after the point-breaking treatment in the first region 104 is fixed outside the laser cutting trajectory line by intermittent glue application in the second region 103.

[0040] The outer casing 1 includes an outer nonwoven fabric and an inner nonwoven fabric, which are integrally composite molded together. The elastic component 102 is disposed between the outer nonwoven fabric and the inner nonwoven fabric.

[0041] The elastic component 102 in the second region 103 is at the same distance from the laser cutting trajectory line 101.

[0042] In this embodiment, the elastic component 102 is a rubber band, and five rubber bands are provided, based on... Figure 13 and Figure 5 As shown, viewed from top to bottom, there is one strip above the buttock area and four strips below the buttock area; therefore, corresponding elastic band break areas 105 are formed in the first area at the upper and lower ends inside the laser cutting trajectory line 101, mainly for subsequent break processing. Other areas inside the laser cutting trajectory line 101 do not require break processing.

[0043] The elastic bands in the second region 103 are all arranged longitudinally; the distance from the elastic bands in the second region 103 to the laser cutting trajectory line 101 is the same; to ensure the adaptability of the tension, the "skirt" effect formed by the elastic retraction will also be uniform.

[0044] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A processing method for trouser-style sanitary products, employing laser O-cutting technology to cut a material width along a laser cutting trajectory line to form a closed leg opening, characterized in that, Includes the following steps: A second region is pre-set on the elastic component outside the laser cutting trajectory line of the material width and intersecting the laser cutting trajectory line, so that the elastic component forms a first region inside the laser cutting trajectory line; The elastic component in the first region is subjected to point breakage, and the broken elastic component generates a displacement toward the second region. The second region fixes the displaced elastic component to the outside of the laser cutting trajectory line, so that the elastic component and the laser cutting trajectory line have no physical intersection.

2. The processing method of a trouser-type sanitary product according to claim 1, characterized in that, A fixed base point is formed at the end of the second region near the retracted end of the elastic component to achieve the consolidation of the elastic component and the nonwoven fabric, and to restrict the elastic component after the point breakage treatment to the outside of the laser cutting trajectory line.

3. A processing method for a trouser-type sanitary product according to claim 1 or 2, characterized in that, The elastic component includes, but is not limited to, any one or more of the following: elastic band, elastic membrane, elastic mesh fabric, or elastic band.

4. The processing method of a trouser-type sanitary product according to claim 1, characterized in that, The material web is continuously conveyed, and the material web includes at least the outer casing.

5. The processing method of a trouser-type sanitary product according to claim 1, characterized in that, Point breakage is handled using either ultrasonic point breakage or mechanical point breakage methods.

6. The processing method of a trouser-type sanitary product according to claim 2, characterized in that, The elastic component is formed into a break point after being processed by point cutting. The first distance between the break point and the intersection point of the laser cutting trajectory line and the elastic component is L1, and the second distance between the break point and the fixed base point is L2, where L2 > L1.

7. The processing method of a trouser-type sanitary product according to claim 6, characterized in that, The distances from all the fixed base points to their corresponding intersection points are equal.

8. The processing method of a trouser-type sanitary product according to claim 1, characterized in that, The laser O-cutting technology uses a picosecond pulse laser.

9. A processing method for a trouser-type sanitary product according to claim 1, characterized in that, A vision system is used to identify a predetermined laser cutting trajectory line in order to control the position of the laser or flexible component.

10. A type of trouser-shaped sanitary product, characterized in that, The product is manufactured using the processing method of the trouser-type sanitary product according to claim 1, comprising: The outer body has a waist opening and two leg openings; Elastic components are disposed within the outer casing and are symmetrically distributed about the longitudinal centerline of the outer casing; The second region is located on an elastic component outside the laser cutting trajectory line of the material width and intersecting with the laser cutting trajectory line, such that the elastic component forms a first region inside the laser cutting trajectory line; the second region is used to fix the elastic component after point breaking in the first region outside the laser cutting trajectory line.

11. A trouser-type sanitary product according to claim 10, characterized in that, The outer casing includes an outer nonwoven fabric and an inner nonwoven fabric, which are integrally composite molded together, and the elastic component is disposed between the outer nonwoven fabric and the inner nonwoven fabric.

12. A trouser-type sanitary product according to claim 11, characterized in that, The distance from the elastic component to the laser cutting trajectory line is the same in the second region.

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