Dry and comfortable non-woven fabric, manufacturing equipment thereof and absorption article

Abstract

The utility model discloses a dry and comfortable non-woven fabric and manufacturing equipment and an absorption article thereof, the dry and comfortable non-woven fabric is composed of at least one layer of non-woven fabric, the surface of the non-woven fabric is provided with funnel-shaped holes and protruding parts, the hole opening direction of the funnel-shaped holes is opposite to the direction of the protruding parts, the surfaces of the protruding parts are provided with hydrophobic coatings, and the hydrophobic coatings are coated on the surfaces of the non-woven fabric. The hydrophobic coating is arranged on the surface of the convex part of the non-woven fabric, and the surface tension of the hydrophobic coating is low, so that body fluid is not easy to remain on the convex part, and the body fluid can be quickly guided to the funnel-shaped opening of the non-woven fabric and quickly infiltrated into the absorption core layer. Meanwhile, the protruding parts of the non-woven fabric directly make contact with the human body, the contact area of the non-woven fabric and the human body is reduced, the hydrophobic coatings of the protruding parts of the non-woven fabric can rapidly transfer body fluid, the body fluid is not prone to being left between fibers of the protruding parts, and therefore the non-woven fabric is dry, comfortable and comfortable to use.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabrics, and in particular to a dry nonwoven fabric with fast absorption speed, low body fluid residue, and dry surface, as well as its manufacturing equipment. Background Technology

[0002] Non-woven fabrics are soft and fluffy, making them easily acceptable to people. To achieve rapid absorption and prevent slippage, non-woven fabrics are generally made of hydrophilic fibers. However, while hydrophilic non-woven fabrics can quickly absorb body fluids during use, due to surface tension, body fluids can easily remain between the fibers. Furthermore, the large surface area for body fluid diffusion on the surface of the non-woven fabric leads to a damp feeling, excessive backflow, and a lack of dryness. Chinese Patent Publication No. CN 103417337A, published on December 4, 2013, entitled "A Non-woven Fabric," discloses a non-woven fabric that, through a coating process, creates a hydrophobic portion with a water contact angle greater than 70 degrees and a hydrophilic portion with a water contact angle less than 70 degrees on its surface. The area with a contact angle less than 70 degrees facilitates the penetration of body fluids, while the area with a contact angle greater than 70 degrees reduces backflow. Although this method can reduce the hydrophilic area of ​​the nonwoven fabric surface, thereby reducing backflow, body fluids will still remain between the fibers in the hydrophilic area, resulting in a strong sense of dampness on the surface layer of the hydrophilic area. Therefore, the part in contact with the skin will still be damp and easily stick to the skin, failing to achieve the goal of being completely dry. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the existing technology and provide a dry nonwoven fabric with fast absorption speed, little body fluid residue, and a dry surface, as well as its manufacturing equipment and absorbent articles.

[0004] The technical solution of this utility model is as follows:

[0005] A dry nonwoven fabric, comprising at least one layer of nonwoven fabric, having a funnel-shaped opening and raised portions on its surface, wherein the opening direction of the funnel-shaped opening is opposite to the direction of the raised portions, the surface of the raised portions has a hydrophobic coating, the total area of ​​the raised portions accounts for 10%-90% of the surface area of ​​the nonwoven fabric, and the height of the raised portions is 0.2-5mm.

[0006] The protrusion can be hollow or solid.

[0007] The nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric.

[0008] The hydrophobic coating is a functional hydrophobic coating.

[0009] The dry nonwoven fabric also includes a lower nonwoven fabric layer, which has the same funnel-shaped openings as the nonwoven fabric.

[0010] An absorbent article comprising the aforementioned dry nonwoven fabric.

[0011] A manufacturing apparatus for producing the aforementioned dry nonwoven fabric includes: an embossing, perforating, and coating device;

[0012] The embossing and perforating coating device includes an embossing roller, a needle roller, a coating convex roller, and a liquid storage tank, wherein the needle roller is matched with the embossing roller and the coating convex roller respectively;

[0013] The needle roller is provided with a plurality of punching needles and a plurality of needle roller recesses, and the punching needles and the needle roller recesses are circumferentially staggered.

[0014] The embossing roller has recesses corresponding to the perforating needles of the needle roller; the coating convex roller has coating protrusions corresponding to the needle roller recesses of the needle roller.

[0015] The coating cam is used to transfer the hydrophobic agent in the liquid storage tank to the needle roller recess through the coating cam on the coating cam.

[0016] The embossing and perforating coating device also includes an upper liquid roller and a sponge roller. The upper liquid roller is in contact with the hydrophobic agent in the liquid storage tank, and the sponge roller is in contact with both the upper liquid roller and the coating convex roller.

[0017] The embossing and perforating coating device has coating protrusions on the coating convex roller, and nozzles at the top of the coating protrusions; the liquid storage tank has connecting pipes that connect to the nozzles at the top of each coating protrusion inside the coating convex roller.

[0018] The embossing roller also has embossing protrusions corresponding to the needle roller recesses of the needle roller, or the surface of the embossing roller is smooth and only has recesses corresponding to the punching needles of the needle roller.

[0019] With the above solution, the dry nonwoven fabric of this invention can be used as the surface layer of sanitary napkins or diapers. Because the raised portions of the dry nonwoven fabric have a hydrophobic coating with low surface tension, body fluids are less likely to remain on the raised portions, facilitating rapid drainage of body fluids to the funnel-shaped openings of the nonwoven fabric and quick penetration into the absorbent core. Simultaneously, the raised portions of the nonwoven fabric are in direct contact with the human body, reducing the contact area between the nonwoven fabric and the body. Furthermore, the hydrophobic coating on the raised portions allows for rapid transfer of body fluids, preventing fluid residue between the fibers. Therefore, it is drier and more comfortable to use. The hydrophobic coating can also be a functional hydrophobic coating, for example, adding antibacterial substances for antibacterial effects, or adding shea butter, chamomile, etc., for moisturizing the skin. In addition, during the production process, plain weave nonwoven fabric is embossed, perforated and coated simultaneously through an embossing, perforating and coating device. This reduces production steps and saves production costs. It also prevents coating misalignment caused by the coating process of raised parts, which would affect the penetration and drying properties and fail to achieve the expected results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the production process of the dry nonwoven fabric of Embodiment 1 of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the dry nonwoven fabric of Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the production process of the dry nonwoven fabric in Embodiment 2 of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the dry nonwoven fabric of Embodiment 2 of this utility model;

[0024] Figure 5 This is a schematic diagram of the production process of the dry nonwoven fabric in Embodiment 3 of this utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the dry nonwoven fabric of Embodiment 3 of this utility model;

[0026] Label Explanation:

[0027] Dry nonwoven fabric 1, plain nonwoven fabric 11, another plain nonwoven fabric 12;

[0028] a. Funnel-shaped opening; b. Protruding part; c. Hydrophobic coating.

[0029] Embossing roller A, embossing protrusion A1, embossing depression A2;

[0030] Needle roller B, needle roller recess B1, punching needle B2;

[0031] Coating roller C, coating protrusion C1, nozzle C2;

[0032] Liquid storage tank D, liquid loading roller E, sponge roller F, connecting pipe G, composite roller H, composite recess H1, guide roller J. Detailed Implementation

[0033] The technical solution of this utility model will be further explained and described below with reference to the accompanying drawings through specific embodiments.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this utility model discloses a dry nonwoven fabric 1, which is composed of a layer of nonwoven fabric and has a funnel-shaped opening a and a raised portion b on its surface. The opening direction of the funnel-shaped opening a is opposite to the direction of the raised portion b. The surface of the raised portion b also has a hydrophobic coating c. The total area of ​​the raised portion b accounts for 10%-90% of the surface area of ​​the nonwoven fabric. The height of the raised portion b is 0.2-5mm. The raised portion b is a hollow protrusion. The nonwoven fabric can be hot-air nonwoven fabric, spunbond nonwoven fabric or spunlace nonwoven fabric. In Example 1, it is pure cotton spunlace nonwoven fabric.

[0036] like Figure 1 This utility model provides a manufacturing equipment for manufacturing the aforementioned dry nonwoven fabric, including: an embossing, perforating and coating device;

[0037] The embossing and perforating coating device includes an embossing roller A, a needle roller B, a coating convex roller C, and a liquid storage tank D, wherein the needle roller B is matched with the embossing roller A and the coating convex roller C respectively.

[0038] The needle roller B is provided with a plurality of punching needles B2 and a plurality of needle roller recesses B1, and the punching needles B2 and the needle roller recesses B1 are circumferentially staggered.

[0039] The embossing roller A has a recess A2 corresponding to the punching needle B2 of the needle roller B; the coating convex roller C has a coating protrusion C1 corresponding to the needle roller recess B1 of the needle roller B.

[0040] The embossing and perforating coating device also includes an upper liquid roller E and a sponge roller F. The upper liquid roller E is in contact with the hydrophobic agent in the liquid storage tank D, and the sponge roller F is in contact with the upper liquid roller E and the coating convex roller C respectively.

[0041] The dry nonwoven fabric 1 of this utility model can be manufactured by the following method:

[0042] Plain nonwoven fabric 11 is fed into the embossing and perforating coating device via guide roller J. During operation, the hydrophobic agent in the liquid storage tank D is carried to the sponge roller F via the liquid loading roller E. When the sponge roller F comes into contact with the coating convex roller C, the hydrophobic agent is transferred to the coating protrusion C1 of the coating convex roller C. The coating protrusion C1 of the coating convex roller C then transfers the hydrophobic agent to the needle roller recess B1 of the needle roller B. When the plain nonwoven fabric 11 enters between the embossing roller A and the needle roller B, the embossing of the heated embossing roller A... The protrusion A1 squeezes the fibers of the plain nonwoven fabric 11 into the needle roller recess B1, and the fiber surface melts and solidifies to form a protruding part b. The protruding part b is hollow, and the hydrophobic agent in the needle roller recess B1 is coated on the surface of the protruding part b of the plain nonwoven fabric 11. At the same time, the perforating needle B1 on the heated needle roller B pierces the plain nonwoven fabric 11, and the fiber surface melts and solidifies to form a funnel-shaped opening a, thereby forming a dry nonwoven fabric 1 with perforated embossing.

[0043] This dry nonwoven fabric 1 can be used in absorbent products, including sanitary napkins, panty liners, and diapers. The absorbent product consists of a top layer, an absorbent core layer, and a bottom layer. The top layer is the dry nonwoven fabric 1. When a consumer uses it, the protruding parts b on the surface of the dry nonwoven fabric 1 come into direct contact with the body, reducing the contact area between the fabric and the body. Furthermore, because the surface tension of the hydrophobic coating c on the protruding parts b is lower than that of the rest of the fabric, body fluid is less likely to remain on the protruding parts b and between the fibers. This facilitates the rapid flow of body fluid to the open sections of the dry nonwoven fabric 1 and through the funnel-shaped openings a to quickly seep into the absorbent core layer, resulting in a drier and more comfortable feel. The coating roller C can be a metal roller, a rubber roller, or a sponge roller, with a protrusion C1 on its surface, which can transfer the hydrophobic agent on the liquid-carrying roller and the sponge roller to the needle roller recess B1 of the needle roller B, thereby achieving targeted coating.

[0044] Example 2

[0045] like Figure 3 and Figure 4 As shown, this utility model discloses a dry nonwoven fabric 1, which is composed of a layer of nonwoven fabric and has a funnel-shaped opening a and a raised portion b on its surface. The opening direction of the funnel-shaped opening a is opposite to the direction of the raised portion b. The surface of the raised portion b also has a hydrophobic coating c. The total area of ​​the raised portion b accounts for 10%-90% of the surface area of ​​the nonwoven fabric. The height of the raised portion is 0.2-5mm. The raised portion b is a solid protrusion. The nonwoven fabric can be hot-air nonwoven fabric, spunbond nonwoven fabric or spunlace nonwoven fabric. In Example 1, it is hot-air nonwoven fabric.

[0046] The dry nonwoven fabric 1 of this utility model is manufactured using the following method:

[0047] Plain nonwoven fabric 11 is fed into an embossing and perforating coating device via guide roller J. This device includes an embossing roller A, a needle roller B, a coating cam roller C, and a liquid storage tank D. The needle roller B is matched with both the embossing roller A and the coating cam roller C. The surface of the embossing roller A has no embossing protrusions, only recesses A2 corresponding to the perforation needles B2 of the needle roller B. The coating cam roller C has coating protrusions C1, with nozzles C2 at the top of these protrusions. During operation, the hydrophobic agent in the liquid storage tank D is transported to the interior of the coating cam roller C through a connecting pipe G. When the coating cam roller C contacts the needle roller B, the hydrophobic agent is sprayed through the nozzles C2 at the top of the coating protrusions C1 onto the needle roller B's needle roller recesses B1. When the plain nonwoven fabric 11 enters between the embossing roller A and the needle roller B, the heated surface of the embossing roller A... The plain nonwoven fabric 11 fibers are squeezed into the needle roller B needle roller recess B1 in the non-protruding part. The fiber surface is melted and solidified to form a protruding part b. The protruding part b is a solid protrusion. The hydrophobic agent in the needle roller recess B1 is coated on the surface of the protruding part b of the nonwoven fabric. At the same time, the perforating needle B2 on the heated needle roller B pierces the nonwoven fabric. The fiber surface melts and solidifies to form a funnel-shaped opening a, thereby forming a dry nonwoven fabric 1 with perforated embossing.

[0048] In this embodiment 2, the protrusion b is a solid protrusion. When in contact with the human body, the solid protrusion not only reduces the contact area but also makes the fiber structure more elastic, resulting in a softer and more comfortable protrusion. Simultaneously, the design of the nozzle C2 at the top of the coating protrusion C1 of the coating roller C allows for the spraying of liquid into the needle roller recess B1 on the needle roller B upon contact with the needle roller B. This enables precise, point-to-point liquid transfer, allowing for accurate adjustment of the amount of hydrophobic liquid in the hydrophobic coating and effective control and balance of the dryness and permeability of the dry nonwoven fabric. Furthermore, the hydrophobic coating can also be a functional hydrophobic coating; for example, adding antibacterial substances can provide antibacterial effects, or adding shea butter, chamomile, etc., can moisturize the skin.

[0049] Example 3

[0050] like Figure 5 and Figure 6As shown, this utility model discloses a multi-layer dry nonwoven fabric 1, which consists of two layers of nonwoven fabric. The surface of the upper nonwoven fabric has a funnel-shaped opening a and a raised portion b. The opening direction of the funnel-shaped opening a is opposite to the direction of the raised portion b. The surface of the raised portion b also has a hydrophobic coating c. The total area of ​​the raised portion b accounts for 10%-90% of the surface area of ​​the upper nonwoven fabric. The height of the raised portion b is 0.2-5mm. The lower nonwoven fabric has the same funnel-shaped opening a as the upper nonwoven fabric. The raised portion b is a hollow protrusion. The upper and lower nonwoven fabrics can be hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric. In embodiment 3, the upper layer is pure cotton spunlace nonwoven fabric and the lower layer is spunbond nonwoven fabric.

[0051] The dry nonwoven fabric 1 with a multi-layer structure of this utility model is manufactured using the following method:

[0052] Plain nonwoven fabric 11 is fed into an embossing and perforating coating device via guide roller J. The embossing and perforating coating device includes an embossing roller A, a needle roller B, a coating convex roller C, a liquid feeding roller E, a sponge roller F, and a liquid storage tank D. The needle roller B is matched with the embossing roller A and the coating convex roller C respectively. The embossing roller A has an embossing protrusion A1 corresponding to the needle roller recess B1 of the needle roller B and a recess A2 corresponding to the perforation needle B2 of the needle roller B. The upper liquid roller E contacts the hydrophobic agent in the liquid tank D. The sponge roller F contacts both the upper liquid roller E and the coating cam roller C. During operation, the hydrophobic agent in the liquid tank D is carried to the sponge roller F by the upper liquid roller E. When the sponge roller F contacts the coating cam roller C, it transfers the hydrophobic agent to the coating protrusion C1 of the coating cam roller C. The coating protrusion C1 of the coating cam roller C transfers the hydrophobic agent to the needle roller recess B1 of the needle roller B. When the plain weave nonwoven fabric 11 enters between the embossing roller A and the needle roller B, the embossing protrusion A1 of the heated embossing roller A squeezes the fibers of the plain weave nonwoven fabric 11 into the needle roller recess B1. The fibers are melted and solidified on the surface to form a protruding part b. The protruding part b is hollow, and the hydrophobic agent in the needle roller recess B1 is coated onto the plain weave nonwoven fabric. The surface of the raised portion b of the plain weave nonwoven fabric 11 is simultaneously pierced by the perforating needle B1 on the heated needle roller B. The fiber surface melts and solidifies to form a funnel-shaped opening a, forming the upper layer of nonwoven fabric. It then enters the composite device to be composited with another plain weave nonwoven fabric 12. The composite device is a composite roller H that meshes with the needle roller B. The surface of the composite roller H has a composite recess H1 corresponding to the perforating needle B2 of the needle roller B. During operation, the perforating needle B2 on the needle roller B pierces the upper layer of nonwoven fabric again, and at the same time pierces the other plain weave nonwoven fabric 12 that is stacked together. The fiber surface melts and solidifies to form a funnel-shaped opening a and the upper and lower layers of nonwoven fabric are composited together to form a dry nonwoven fabric 1 with a multi-layer structure and perforated embossing.

[0053] In this embodiment 3, the dry nonwoven fabric 1 has a multi-layer structure. The upper layer has a raised portion b and a funnel-shaped opening a. The raised portion b is a hollow protrusion. The lower layer has the same funnel-shaped opening a as the upper layer. The two layers can be joined together by thermal bonding or adhesive bonding. The raised portion b of the upper nonwoven fabric has a hydrophobic coating c, which can reduce the contact area with the human body and provide dryness. The lower nonwoven fabric can enhance the support of the raised portion b and prevent the hollow part of the raised portion b from being flattened during use and winding. This method also endows multilayer dry, open-pore embossed nonwoven fabrics with different properties. For example, the upper layer is a spunlace nonwoven fabric with a hydrophobic coating (c), and the lower layer is a hydrophilic spunbond nonwoven fabric. This not only improves the overall mechanical properties of the multilayer nonwoven fabric and avoids the easy deformation of spunlace nonwoven fabric, but also increases its dryness and skin-friendliness. Conversely, if the upper layer is a fine denier hot-air nonwoven fabric and the lower layer is a coarse denier hot-air nonwoven fabric, the lower layer can act as a guide, thereby improving the permeability of the multilayer nonwoven fabric. Furthermore, this manufacturing method allows for simultaneous perforation, embossing, coating, and lamination, reducing production steps, saving production costs, and preventing coating misalignment during the coating process of raised areas, which could affect permeability and dryness and prevent the desired results from being achieved.

[0054] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A dry nonwoven fabric, characterized in that: The dry nonwoven fabric consists of at least one layer of nonwoven fabric, and its surface has funnel-shaped openings and raised portions. The opening direction of the funnel-shaped openings is opposite to the direction of the raised portions. The surface of the raised portions has a hydrophobic coating. The total area of ​​the raised portions accounts for 10%-90% of the surface area of ​​the nonwoven fabric. The height of the raised portions is 0.2-5mm.

2. The dry nonwoven fabric as described in claim 1, characterized in that: The protrusion can be hollow or solid.

3. The dry nonwoven fabric as described in claim 1, characterized in that: The nonwoven fabric is hot-air nonwoven fabric, spunbond nonwoven fabric, or spunlace nonwoven fabric.

4. The dry nonwoven fabric as described in claim 1, characterized in that: The hydrophobic coating is a functional hydrophobic coating.

5. The dry nonwoven fabric as described in claim 1, characterized in that: The dry nonwoven fabric also includes a lower nonwoven fabric layer, which has the same funnel-shaped openings as the nonwoven fabric.

6. An absorbent article comprising the dry nonwoven fabric of claim 1.

7. A manufacturing apparatus for producing a dry nonwoven fabric as described in any one of claims 1-5, characterized in that, include: Embossing, perforation, and coating equipment; The embossing and perforating coating device includes an embossing roller, a needle roller, a coating convex roller, and a liquid storage tank, wherein the needle roller is matched with the embossing roller and the coating convex roller respectively; The needle roller is provided with a plurality of punching needles and a plurality of needle roller recesses, and the punching needles and the needle roller recesses are circumferentially staggered. The embossing roller has recesses corresponding to the perforating needles of the needle roller; the coating convex roller has coating protrusions corresponding to the needle roller recesses of the needle roller. The coating cam is used to transfer the hydrophobic agent in the liquid storage tank to the needle roller recess through the coating cam on the coating cam.

8. The equipment for manufacturing dry nonwoven fabric as described in claim 7, characterized in that: The embossing and perforating coating device also includes an upper liquid roller and a sponge roller. The upper liquid roller is in contact with the hydrophobic agent in the liquid storage tank, and the sponge roller is in contact with both the upper liquid roller and the coating convex roller.

9. The equipment for manufacturing dry nonwoven fabric as described in claim 7, characterized in that: The embossing and perforating coating device has coating protrusions on the coating convex roller, and nozzles at the top of the coating protrusions; the liquid storage tank has connecting pipes that connect to the nozzles at the top of each coating protrusion inside the coating convex roller.

10. The equipment for manufacturing dry nonwoven fabric as described in claim 7, characterized in that: The embossing roller also has embossing protrusions corresponding to the needle roller recesses of the needle roller, or the surface of the embossing roller is smooth and only has recesses corresponding to the punching needles of the needle roller.

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