Composite non-woven fabric, manufacturing method thereof and absorption product

Abstract

The invention discloses a composite non-woven fabric, a manufacturing method thereof and an absorption product. The composite non-woven fabric comprises an upper-layer non-woven fabric and The composite non-woven fabric is provided with a convex area and a composite perforated area; the composite non-woven fabric further comprises a hot melt adhesive layer located between the upper non-woven fabric layer and the lower non-woven fabric layer, the hot melt adhesive layer is located in the protruding area and the partial composite hole area, the partial composite hole area is the composite part of the non-hole area, namely, the hole part in the composite hole area does not contain the hot melt adhesive layer, and the hot melt adhesive layer is located between the upper non-woven fabric layer and the lower non-woven fabric layer. The punching needle cannot make contact with the hot melt adhesive in the composite punching process, the problem that the hot melt adhesive adheres to the punching needle in the punching process is solved, the situation that the non-woven fabric at the tail end of the hole inversely arches back to the top of the hole to form a blind hole is effectively prevented, and the quality and the using effect of the composite non-woven fabric product are improved.

Description

Technical Field

[0001] This invention relates to the technical field of nonwoven fabrics, and particularly to a composite nonwoven fabric, its manufacturing method, and absorbent articles. Background Technology

[0002] Non-woven fabrics are widely used in hygiene products such as sanitary napkins and diapers due to their softness, skin-friendliness, and breathability. To improve the comfort of the surface layer in contact with the skin, effectively reduce the contact area with the wearer's skin, increase the penetration rate of bodily fluids, and reduce the feeling of dampness, it is usually necessary to create perforations in the surface layer to form absorption channels and to create an uneven structure on its surface to reduce the contact area.

[0003] However, existing embossed and perforated three-dimensional nonwoven fabrics have several problems: significant loss of the raised 3D effect, poor aesthetics, and decreased breathability and liquid permeability. Furthermore, the increased three-dimensional thickness from materials with only surface protrusions is not significant and cannot effectively improve fluffiness and softness, reduce residue, or prevent liquid backflow. To address these issues, composite nonwoven fabric technology has been developed. By adding a hot melt adhesive layer between the upper and lower nonwoven fabric layers, the three-dimensional effect and breathability of the composite nonwoven fabric can be effectively improved. However, in existing composite methods, the hot melt adhesive may soften under human body temperature, causing itching and discomfort in people with sensitive skin. In addition, during the composite process, the hot melt adhesive may stick to the perforation needles, causing the nonwoven fabric at the end of the perforation to arch back to the top of the perforation, forming blind holes and affecting product quality.

[0004] Chinese patent CN113619207A discloses a method for preparing an ultra-soft, moisture-wicking composite elastic fabric. The method involves hot-pressing an outer non-woven fabric layer to a thermoplastic elastic film. After stretching by a stretching roller, the two layers are then rolled together by an embossing roller with a raised pattern, creating uniformly densely distributed breathable holes. Hot melt adhesive is then sprayed or applied through a hot melt adhesive roller to form a hot melt adhesive mesh in the unperforated areas of the thermoplastic elastic film or the inner layer of the functional non-woven fabric. The three layers are then simultaneously passed through a hot press roller to bond the thermoplastic elastic film and the functional non-woven fabric together. However, this patent still has shortcomings in improving the shape, size, and position of the hot melt adhesive mesh, making it difficult to guarantee the uniformity of the mesh. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a composite nonwoven fabric with raised areas and composite open areas that prevents hot melt adhesive from sticking to the punching needle, as well as a manufacturing method and absorbent product thereof.

[0006] The technical solution of the present invention is as follows: A composite nonwoven fabric includes an upper nonwoven fabric and a lower nonwoven fabric; The composite nonwoven fabric has a raised area and a composite perforated area; The raised area has a plurality of raised protrusions, and the raised protrusions have an internal space located between the upper nonwoven fabric and the lower nonwoven fabric. The composite perforated area includes several perforations penetrating the composite nonwoven fabric and a composite portion located in the unperforated area; The composite nonwoven fabric also includes a hot melt adhesive layer located between the upper and lower nonwoven fabrics, wherein the hot melt adhesive layer is located in the composite portion of the raised area and the non-perforated area of ​​the composite perforated area.

[0007] Furthermore, the upper nonwoven fabric is a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric; the lower nonwoven fabric is a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric.

[0008] Furthermore, the hot melt adhesive layer in the raised area is located only outside the internal space of the raised area.

[0009] Furthermore, the protrusion has a protruding area opening that penetrates the upper nonwoven fabric.

[0010] The present invention also provides an absorbent article comprising the aforementioned composite nonwoven fabric, wherein the composite nonwoven fabric is located on the surface of the absorbent article.

[0011] This invention also provides a method for manufacturing composite nonwoven fabric, the main production steps of which include: (1) The upper non-woven fabric enters the embossing and punching device for embossing and punching; The embossing and punching device includes an embossing convex roller and a needle roller that mesh with each other. During operation, the upper non-woven fabric enters between the embossing convex roller and the needle roller. The upper non-woven fabric is squeezed by the embossing convex roller and the corresponding needle roller indentation on the needle roller to form a convex shape. The punching needle on the needle roller and the corresponding embossing convex roller indentation on the embossing convex roller pierce and cooperate to form an opening. (2) After the upper nonwoven fabric is embossed and perforated in step (1), it is pierced by a perforating needle so that it covers the surface of the needle roller and enters the composite device to be composited with the lower nonwoven fabric. The composite device includes a composite roller, an applicator roller, a tape roller, and a glue trough. The surface of the composite roller has composite roller recesses that match those of the needle roller. The applicator roller's recesses are identical to and uniformly distributed with the composite roller's recesses. During operation, the tape roller rotates, bringing the hot melt adhesive from the glue trough to its surface. The tape roller contacts the applicator roller, transferring the hot melt adhesive to the surface of the applicator roller outside its recesses. A lower layer of nonwoven fabric enters between the composite roller and the applicator roller, with the composite roller recesses and applicator roller recesses aligned. As the upper and lower nonwoven fabrics rotate, the glue roller partially applies hot melt adhesive to the surface of the lower nonwoven fabric. When the upper and lower nonwoven fabrics enter between the composite roller and the needle roller, the perforating needles on the needle roller cooperate with the concave holes on the composite roller to puncture the upper and lower nonwoven fabrics. At the same time, the upper and lower nonwoven fabrics are bonded together by hot melt adhesive to form the composite nonwoven fabric. In this composite nonwoven fabric, a hot melt adhesive layer is formed between the upper and lower nonwoven fabrics, located in the raised area and the unperforated area.

[0012] Furthermore, the composite roller and the gluing roller also have composite roller recesses and gluing roller recesses respectively, which correspond to the embossing protrusions on the embossing convex roller.

[0013] Furthermore, the needle roller has a raised perforation needle at the bottom of its recess, and the embossing convex roller has a raised recess corresponding to the raised perforation needle at the bottom of its recess.

[0014] Furthermore, the composite device also includes a scraper; after the glue roller rotates to bring the hot melt adhesive in the glue tank to the surface of the glue roller, the scraper removes the excess hot melt adhesive.

[0015] By adopting the above solution, this invention forms a composite nonwoven fabric with raised areas and composite opening areas by setting a hot melt adhesive layer between the upper and lower nonwoven fabric layers and using a special embossing and perforation device and composite device process. This effectively improves the three-dimensional thickness of the product, enhances its fluffiness and softness, and significantly improves its aesthetics. In this invention, the hot melt adhesive layer of the composite nonwoven fabric is only located in the raised areas and part of the composite opening areas. The part of the composite opening areas is the unopened composite portion, meaning that the open portion in the composite opening area does not contain a hot melt adhesive layer. This ensures that the perforating needle will not come into contact with the hot melt adhesive during the composite perforation process. The contact between the two avoids the problem of hot melt adhesive sticking to the punching needle during the punching process, effectively preventing the nonwoven fabric at the end of the hole from arching back to the top of the hole and forming blind holes, thus improving the quality and performance of the composite nonwoven fabric product. It not only ensures the breathability of the product, but also avoids the problem of hot melt adhesive softening under the influence of human body temperature, effectively solving the problem of itching and discomfort for people with sensitive skin. In addition, by having the same and consistent distribution of concave holes on the composite roller and the glue roller, the present invention achieves localized coating of hot melt adhesive during the composite process, and effectively determines the shape, size and position of the hot melt adhesive in the composite nonwoven fabric, thereby improving the overall performance of the composite nonwoven fabric. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the composite nonwoven fabric of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the O-O' cross-section of the composite nonwoven fabric in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the production process of the composite nonwoven fabric in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the absorbent article of Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the composite nonwoven fabric of Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the P-P' cross-section of the composite nonwoven fabric in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the production process of the composite nonwoven fabric in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the composite nonwoven fabric of Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the Q-Q' cross-section of the composite nonwoven fabric in Embodiment 3 of the present invention; Figure 10 This is a schematic diagram of the production process of the composite nonwoven fabric in Embodiment 3 of the present invention; Marker explanation: Composite nonwoven fabric 10, upper nonwoven fabric 1, lower nonwoven fabric 2; 3. Protrusion 3, opening 4, opening 4' in the protrusion area, internal space 5, hot melt adhesive layer 6; 7. Absorbent product; 8. Absorbent core; 9. Bottom film; Embossing roller A, embossing protrusion A1, embossing roller recess A2, protrusion recess A3, needle roller B, punching needle B1, needle roller recess B2, protrusion punching needle B3, composite roller C, composite roller recess C1, composite roller recess C2, gluing roller D, gluing roller recess D1, gluing roller recess D2, glue roller E, glue groove F, scraper G. Detailed Implementation The technical solution of the present invention will be further explained and described below with reference to the accompanying drawings through specific embodiments.

[0017] Example 1 like Figure 1 and Figure 2 As shown, this invention discloses a composite nonwoven fabric 10, comprising an upper nonwoven fabric 1 and a lower nonwoven fabric 2; the composite nonwoven fabric 10 has a raised region and a composite perforated region; the raised region has a plurality of protrusions 3, each protrusion 3 having an internal space 5 located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2; the composite perforated region includes a plurality of openings 4 penetrating the composite nonwoven fabric and a composite portion located in the non-perforated region; the composite nonwoven fabric 10 further includes a hot melt adhesive layer 6 located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, the hot melt adhesive layer 6 being located in the raised region and part of the composite perforated region, wherein the part of the composite perforated region is the composite portion of the non-perforated region. The upper nonwoven fabric 1 or the lower nonwoven fabric 2 can be a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a spunlace nonwoven fabric. In embodiment 1, the upper nonwoven fabric 1 is a spunlace nonwoven fabric, and the lower nonwoven fabric 2 is a hot-air nonwoven fabric.

[0018] like Figure 3 As shown, the composite nonwoven fabric 10 of the present invention is manufactured using the following method: (1) The upper nonwoven fabric 1 enters the embossing and punching device; The embossing and perforating device includes an embossing convex roller A and a needle roller B that mesh with each other. During operation, the upper non-woven fabric 1 enters between the embossing convex roller A and the needle roller B. The upper non-woven fabric 1 is squeezed by the embossing convex protrusions A1 on the embossing convex roller A and the corresponding needle roller recesses B2 on the needle roller B to form protrusions 3. The perforating needles B1 on the needle roller B and the corresponding embossing convex roller recesses A2 on the embossing convex roller A are used to puncture and cooperate to form openings 4. (2) After the upper nonwoven fabric 1 is embossed and perforated in step (1), it is pierced by the perforating needle B1 so that it covers the surface of the needle roller A and enters the composite device to be composited with the lower nonwoven fabric 2. The laminating device includes a laminating roller C, an applicator roller D, a tape roller E, a glue trough F, and a doctor blade G. The laminating roller C has a laminating roller recess C1 on its surface that matches the needle roller B. The applicator roller D has the same applicator roller recess D1 as the laminating roller C on the laminating roller C, and their distribution is consistent. During operation, the tape roller E rotates, bringing the hot melt adhesive from the glue trough F to its surface. Excess hot melt adhesive is removed by the doctor blade G. The tape roller E contacts the applicator roller D, transferring the hot melt adhesive to the surface of the applicator roller D outside the applicator roller recess D1. The lower nonwoven fabric 2 enters between the laminating roller C and the applicator roller D. The composite roller C and the gluing roller D rotate synchronously with each other. The gluing roller D partially applies hot melt adhesive to the surface of the lower nonwoven fabric 2. When the upper nonwoven fabric 1 and the lower nonwoven fabric 2 enter between the composite roller C and the needle roller B, the punching needle B1 on the needle roller B and the composite roller concave hole C1 on the composite roller C cooperate to puncture the upper nonwoven fabric 1 and the lower nonwoven fabric 2. At the same time, the upper nonwoven fabric 1 and the lower nonwoven fabric 2 are bonded together by hot melt adhesive to form the composite nonwoven fabric 10, wherein the hot melt adhesive layer 6 of the composite nonwoven fabric 10 is located in the raised area and part of the composite perforated area.

[0019] In Example 1, the composite nonwoven fabric 10 has raised areas and composite perforated areas, which effectively improves the three-dimensional thickness of the product, enhances its fluffiness and softness, and significantly improves its aesthetics. The hot melt adhesive layer 6 of the composite nonwoven fabric 10 is only located in the raised areas and part of the composite perforated areas. The part of the composite perforated areas refers to the non-perforated composite parts, that is, the perforated parts in the composite perforated areas do not contain the hot melt adhesive layer 6. This ensures that the perforating needle B1 will not come into contact with the hot melt adhesive during the composite perforation process, avoiding the problem of the hot melt adhesive sticking to the perforating needle B1 during the perforation process, and effectively preventing the perforation from being damaged. The nonwoven fabric at the end arches back to form blind holes at the top of the opening 4, improving the quality and performance of the composite nonwoven fabric product. This ensures the product's breathability while preventing the hot melt adhesive from softening under body temperature, effectively solving the itching and discomfort problem for people with sensitive skin. Furthermore, by ensuring that the concave holes C1 and D1 on the composite roller C and the gluing roller D are identical and consistently distributed, the invention achieves localized hot melt adhesive coating during the lamination process, effectively determining the shape, size, and position of the hot melt adhesive in the composite nonwoven fabric, thus improving the overall performance of the composite nonwoven fabric 10. This composite nonwoven fabric 10 can be applied to absorbent products 7, such as... Figure 4 As shown, the absorbent product 7 includes a composite nonwoven fabric 10, an absorbent core 8, and a bottom film 9, wherein the composite nonwoven fabric 10 is located on the surface of the absorbent product, and the absorbent products include sanitary napkins, panty liners, diapers, etc.

[0020] Example 2 like Figure 5 and Figure 6As shown, this invention discloses a composite nonwoven fabric 10, comprising an upper nonwoven fabric 1 and a lower nonwoven fabric 2; the composite nonwoven fabric 10 has a raised region and a composite perforated region; the raised region has a plurality of protrusions 3, each protrusion 3 having an internal space 5 located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2; the composite perforated region includes a plurality of openings 4 penetrating the composite nonwoven fabric and a composite portion located in the non-perforated region; the composite nonwoven fabric 10 further includes a hot melt adhesive layer 6 located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, the hot melt adhesive layer 6 being located in the raised region and part of the composite perforated region, wherein: the hot melt adhesive layer in the raised region is only located outside the internal space of the protrusion, and the part of the composite perforated region is the composite portion of the non-perforated region. The upper nonwoven fabric 1 or the lower nonwoven fabric 2 can be a hot-air nonwoven fabric, a spunbond nonwoven fabric, or a hydroentangled nonwoven fabric; in embodiment 2, both the upper nonwoven fabric 1 and the lower nonwoven fabric 2 are hot-air nonwoven fabrics.

[0021] like Figure 7 As shown, the manufacturing method of the composite nonwoven fabric 10 of the present invention is the same as that of Example 1: except that the composite roller C and the gluing roller D also have composite roller recesses C2 and gluing roller recesses D2 corresponding to the embossing protrusions A1 on the embossing roller A, respectively. During operation, the gluing roller E rotates to bring the hot melt adhesive in the glue tank F to the surface of the gluing roller E, and removes the excess hot melt adhesive by the scraper G. The gluing roller E and the gluing roller D come into contact, transferring the hot melt adhesive to the surface of the roller D outside the gluing roller recesses D1 and D2. The lower nonwoven fabric 2 enters between the composite roller C and the gluing roller D. The composite roller recesses C1 and D1 of the composite roller C and the gluing roller D are opposite each other, and the composite roller recesses C2 and D2 are opposite each other and rotate synchronously. The gluing roller D partially coats the surface of the lower nonwoven fabric 2 with hot melt adhesive. When the upper nonwoven fabric The upper nonwoven fabric 1 and the lower nonwoven fabric 2 enter between the composite roller C and the needle roller B. The perforating needle B1 on the needle roller B cooperates with the composite roller concave hole C1 on the composite roller C to puncture the upper nonwoven fabric 1 and the lower nonwoven fabric 2. At the same time, the upper nonwoven fabric 1 and the lower nonwoven fabric 2 are bonded together by hot melt adhesive to form the composite nonwoven fabric 10. The hot melt adhesive layer 6 of the composite nonwoven fabric 10 is located in the raised area and part of the composite perforated area. The hot melt adhesive layer 6 in the raised area is only located outside the internal space 5 of the raised area, and the hot melt adhesive layer 6 in the part of the composite perforated area is located in the composite part of the non-perforated area.

[0022] In this embodiment 2, the hot melt adhesive layer 6 is located only outside the internal space 5 of the raised area and the composite part of the un-perforated area of ​​the composite perforated area. This ensures that the perforating needle B1 will not come into contact with the hot melt adhesive during the composite perforation process, avoiding the problem of the hot melt adhesive sticking to the perforating needle B1 during the perforation process. This effectively prevents the nonwoven fabric at the end of the perforation 4 from arching back to the top of the perforation 4 to form a blind hole, thus improving the quality and performance of the composite nonwoven fabric product. At the same time, since the internal space 5 is composed of the upper nonwoven fabric 1 and the lower nonwoven fabric 2, the upper nonwoven fabric 1 and the lower nonwoven fabric 2 cannot be bonded together here. Furthermore, there is no hot melt adhesive layer 6 inside the internal space 5 of the raised area. This saves on the amount of hot melt adhesive used, reduces production costs, and effectively prevents the upper nonwoven fabric 1 and the lower nonwoven fabric 2 from bonding together, which would affect the dryness and fluffiness of the composite nonwoven fabric 10.

[0023] Example 3 like Figure 8 and Figure 9 As shown, the present invention discloses a composite nonwoven fabric 10, including an upper nonwoven fabric 1 and a lower nonwoven fabric 2; the composite nonwoven fabric 10 has a raised region and a composite perforated region; the raised region has a plurality of protrusions 3, each protrusion 3 having an internal space 5 located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, and the protrusion 3 also has a raised region opening 4' penetrating the upper nonwoven fabric 1; the composite perforated region includes a plurality of openings 4 penetrating the composite nonwoven fabric and a composite portion located in the non-perforated region; the composite nonwoven fabric 10 also includes a hot melt adhesive layer 6 located between the upper nonwoven fabric 1 and the lower nonwoven fabric 2, the hot melt adhesive layer 6 being located in the raised region and part of the composite perforated region, wherein: the hot melt adhesive layer in the raised region is only located outside the internal space of the protrusion, and the part of the composite perforated region is the composite portion of the non-perforated region. The upper nonwoven fabric 1 or the lower nonwoven fabric 2 can be hot-air nonwoven fabric, spunbond nonwoven fabric or hydroentangled nonwoven fabric. In Example 3, the upper nonwoven fabric 1 is hot-air nonwoven fabric and the lower nonwoven fabric 2 is spunbond nonwoven fabric.

[0024] like Figure 10As shown, the manufacturing method of the composite nonwoven fabric 10 of the present invention is the same as that of Example 2: except that the upper nonwoven fabric 1 enters the embossing and punching device; the embossing and punching device includes an embossing convex roller A and a needle roller B that mesh with each other; the bottom of the needle roller recess B2 of the needle roller B has a raised punching needle B3, and the embossing protrusion A1 of the embossing convex roller A has a raised recess A3 corresponding to the raised punching needle B3 at the bottom of the needle roller recess B2 on the needle roller B. During operation, the upper nonwoven fabric 1 enters between the embossing convex roller A and the needle roller B. The upper nonwoven fabric 1 is squeezed by the embossing convex protrusion A1 on the embossing convex roller A and the corresponding needle roller recess B2 on the needle roller B to form a protrusion 3. The perforation needle B1 on the needle roller B and the corresponding embossing convex roller recess A2 on the embossing convex roller A1 are used to puncture and cooperate to form an opening 4. At the same time, the protruding perforation needle B3 at the bottom of the needle roller recess B2 on the needle roller B and the protruding recess A3 on the corresponding embossing convex protrusion A2 on the embossing convex roller A1 are used to puncture and cooperate to form an opening 4' in the protruding area.

[0025] In this embodiment 3, the raised area 3 has raised area openings 4', which can further improve the air permeability of the composite nonwoven fabric. When body fluid comes into contact with the raised area of ​​the composite nonwoven fabric 10, the body fluid can quickly permeate from the raised area openings 4' into the internal space 5 of the raised area 3 of the composite nonwoven fabric, which can temporarily store the body fluid and prevent it from leaking. The hot melt adhesive layer 6 is only located outside the internal space 5 of the raised area 3 and in the composite part of the non-opened area of ​​the raised area, which reduces the amount of hot melt adhesive used and reduces the impact of excess hot melt adhesive on the permeation of body fluid, thereby accelerating the permeation rate of body fluid and improving the dryness of the absorbent product.

[0026] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A composite nonwoven fabric, characterized in that: The composite nonwoven fabric includes an upper nonwoven fabric and a lower nonwoven fabric; The composite nonwoven fabric has a raised area and a composite perforated area; The raised area has a plurality of protrusions, and the protrusions have an internal space located between the upper nonwoven fabric and the lower nonwoven fabric. The composite perforated area includes several perforations penetrating the composite nonwoven fabric and a composite portion located in the unperforated area; The composite nonwoven fabric also includes a hot melt adhesive layer located between the upper and lower nonwoven fabrics, wherein the hot melt adhesive layer is located in the composite portion of the raised area and the non-perforated area of ​​the composite perforated area.

2. The composite nonwoven fabric as described in claim 1, characterized in that: The upper nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric; the lower nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric.

3. The composite nonwoven fabric as described in claim 1, characterized in that: The hot melt adhesive layer in the raised area is located only outside the internal space of the raised area.

4. The composite nonwoven fabric as described in claim 1, characterized in that: The protrusion has a protruding area opening that penetrates the upper non-woven fabric.

5. An absorbent article comprising the composite nonwoven fabric according to any one of claims 1-4, characterized in that: The composite nonwoven fabric is located on the surface of the absorbent product.

6. A method for manufacturing a composite nonwoven fabric, characterized in that: The main production steps include: (1) The upper non-woven fabric enters the embossing and punching device for embossing and punching; The embossing and punching device includes an embossing convex roller and a needle roller that mesh with each other. During operation, the upper non-woven fabric enters between the embossing convex roller and the needle roller. The upper non-woven fabric is squeezed by the embossing convex roller and the corresponding needle roller indentation on the needle roller to form a convex shape. The punching needle on the needle roller and the corresponding embossing convex roller indentation on the embossing convex roller pierce and cooperate to form an opening. (2) After the upper nonwoven fabric is embossed and perforated in step (1), it is pierced by a perforating needle to cover the surface of the needle roller and enter the composite device to be composited with the lower nonwoven fabric. The composite device includes a composite roller, an applicator roller, a tape roller, and a glue trough. The surface of the composite roller has composite roller recesses that match those of the needle roller. The applicator roller's recesses are identical to and uniformly distributed with the composite roller's recesses. During operation, the tape roller rotates, bringing the hot melt adhesive from the glue trough to its surface. The tape roller contacts the applicator roller, transferring the hot melt adhesive to the surface of the applicator roller outside its recesses. A lower layer of nonwoven fabric enters between the composite roller and the applicator roller, with the composite roller recesses and applicator roller recesses aligned. As the upper and lower nonwoven fabrics rotate, the glue roller partially applies hot melt adhesive to the surface of the lower nonwoven fabric. When the upper and lower nonwoven fabrics enter between the composite roller and the needle roller, the perforating needles on the needle roller cooperate with the concave holes on the composite roller to puncture the upper and lower nonwoven fabrics. At the same time, the upper and lower nonwoven fabrics are bonded together by hot melt adhesive to form the composite nonwoven fabric. In this composite nonwoven fabric, a hot melt adhesive layer is formed between the upper and lower nonwoven fabrics, located in the raised area and the unperforated area.

7. The method for manufacturing a composite nonwoven fabric as described in claim 6, characterized in that: The composite roller and the gluing roller also have composite roller recesses and gluing roller recesses that correspond to the embossing protrusions on the embossing convex roller, respectively.

8. The method for manufacturing a composite nonwoven fabric as described in claim 6, characterized in that: The needle roller has a raised perforation needle at the bottom of its recess, and the embossing convex roller has a raised recess corresponding to the raised perforation needle at the bottom of its recess.

9. The method for manufacturing a composite nonwoven fabric as described in claim 6, characterized in that: The composite device also includes a scraper; after the glue roller rotates and brings the hot melt adhesive in the glue tank to the surface of the glue roller, the scraper removes the excess hot melt adhesive.

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