CN114654818B

CN114654818B - Fiber material, preparation method and device and sanitary article

Info

Publication number: CN114654818B
Application number: CN202210133742.6A
Authority: CN
Inventors: 郝学恩; 翟敏
Original assignee: Jiangsu Jinqizhao New Materials Co ltd
Current assignee: Jiangsu Jinqizhao New Materials Co ltd
Priority date: 2022-01-18
Filing date: 2022-02-14
Publication date: 2023-12-05
Anticipated expiration: 2042-02-14
Also published as: CN114654818A

Abstract

The invention belongs to the field of special-performance fiber products and composite materials, and particularly relates to a fiber material, a preparation method, a preparation device and a sanitary article. The three-dimensional fiber composite material can effectively solve the problems of poor three-dimensional retention, poor deformation resistance, poor comfort level, poor elasticity and the like existing in the prior single-layer or double-layer technology in the use process, and forms the support of an internal structure through the upper/lower barb open pore and the lateral barb open pore structure in the 3D bulge, thereby realizing the purposes of increasing three-dimensional sense, elasticity and deformation resistance, further reducing the contact area, improving the air circulation performance, increasing dryness, air permeability, comfort, aesthetic property and experience sense, effectively reducing liquid rewet, effectively reducing loose stool contact and adhesion skin and reducing skin allergy.

Description

Fiber material, preparation method and device and sanitary article

Technical Field

The invention belongs to the field of special-performance fiber products and composite materials, and particularly relates to a non-woven fabric, and a preparation method, a device and application thereof.

Background

In the known technology, the single-layer embossed perforated fibrous product has a convex-concave bulge shape and a certain three-dimensional effect, but the single-layer embossed perforated fibrous product has the following defects and unresolved problems (as shown in fig. 1):

A. the single-layer embossed fiber product has poor three-dimensional retention, and the thickness and three-dimensional effect are reduced greatly when the single-layer embossed fiber product is manufactured into a rolled material;

B. especially, when the diaper or sanitary towel is manufactured by using the adhesive, the three-dimensional effect is greatly reduced when the diaper or sanitary towel is stretched by the process of the manufacturing procedure and is adhered to other materials by using the adhesive;

C. also air permeability and dryness are affected;

D. the aesthetic appearance is also affected.

Another two-ply composite fiber product now on the market: the surface layer is made into a 3D hollow space, and the bottom layer is supported by thermal bonding; the fiber product has improved taste and color compared with the double-layer product, but the heat-sealing hollow three-dimensional double-layer has the following defects and unresolved problems (as shown in figure 2):

A. in a rolling link in the manufacturing process, the 3D hollow three-dimensional body is flat due to lack of support, and the shape of the 3D hollow three-dimensional body is distorted, twisted and irregular;

B. when the material is used for manufacturing products such as panty-shape diapers and sanitary napkins, the 3D stereoscopic effect and softness can be further reduced by technological stretching;

C. the reduced stereoscopic effect can affect the permeability, the comfort level of the customer, the stereoscopic effect and the beautiful appearance.

There is also a three-layer composite fibrous article: the surface layer is made into a 3D bulge, the filling layer fills the whole bulge cavity of the 3D bulge, and the bottom layer material is used as an adhesive support. However, the above heat-sealed hollow stereoscopic bilayer still has the following drawbacks and unresolved problems (as shown in fig. 3):

A. in the rolling, due to the existence of the filling layer, the support to the bulge is stronger, so that the bulge is obviously harder in stereoscopic impression, and the bump contact feeling is stronger.

B. The drum also has perforation characteristics, but due to the presence of the filling layer, liquid infiltration is blocked, and ventilation effect and gas circulation are affected.

C. The use of three layers of materials increases the use cost, also increases the thickness of the product, and has certain influence on ventilation and moisture removal.

Disclosure of Invention

The technical problems to be solved in practice of the invention are as follows: the bulge on the conventional double-layer fiber fabric has poor deformation resistance and difficult structure maintenance, and the filler in the bulge in the three-layer composite material can cause the problem of poor permeability/air permeability. The invention provides a composite fiber material which can effectively solve the problems of poor three-dimensional retention, poor deformation resistance, poor comfort, poor elasticity and the like existing in the prior single-layer or double-layer technology in the use process.

A fibrous material comprising:

a surface layer and a bottom layer;

the part of the area on the surface layer is bulged to form a 3D bulge area, and a bulge cavity L is arranged in the 3D bulge area E;

the upper barb opening is formed by extending the surface layer of the 3D bulge area into the bulge;

the lower barb opening is formed by extending the bottom layer below the 3D bulge area into the bulge.

In one 3D bulge area, the number of upper barb openings and/or lower barb openings is one or more.

The cross section of the upper barb opening and/or the lower barb opening in the horizontal direction is circular or polygonal, and the three-dimensional shape is cylindrical or conical.

The ratio of the horizontal sectional area of the upper barb opening at one end of the surface layer to the horizontal sectional area of the other end is 1-10:1.

the ratio of the horizontal sectional area of the lower barb opening at one end of the bottom layer to the horizontal sectional area of the other end is 1-10:1.

the length of the upper barb open pore and/or the lower barb open pore is 0.1mm-10mm.

The sides of the upper barb apertures and the lower barb apertures can be in contact with each other when the upper barb apertures and/or the lower barb apertures are displaced a distance or not towards the interior of the 3D bulge area.

Further comprises: and an adhesive part for compounding the surface layer and the bottom layer with each other.

Further comprises: an external barb opening, located in a non-3D bulge area on the fibrous material, is formed by the skin layer and the bottom layer.

The direction of the opening of the external barb is the direction facing away from the surface layer.

An apparatus for preparing a fibrous material, comprising:

a first roller, a second roller, a third roller;

the first roller is provided with a protruding part, and a first concave hole is formed in the protruding part;

the second roller is provided with a concave part matched with the convex part, and the bottom of the concave part is provided with a first needle body matched with the first concave hole; a composite or adhesive part is also arranged for compositing the surface layer and the bottom layer;

the third roller is provided with a second needle body matched with the concave part.

The three-dimensional bulge forming machine further comprises a fourth roller, a second concave hole matched with a third needle body on the fourth roller is formed in the third roller, and the second concave hole is used for forming an external barb opening in the outer portion of a 3D bulge area formed by pressing the first roller and the second roller.

A method of making a fibrous material comprising the steps of:

forming a 3D bulge region and a recess region on the skin layer by the cooperation of the first roller and the second roller; forming an upper barb opening on the 3D bulge region through the cooperation of the first concave hole and the first needle body while forming the 3D bulge region;

compounding the side, which is matched with the second roller and the third roller 3 and is away from the 3D bulge area, of the surface layer with the bottom layer I;

lower barb openings facing the inside of the 3D bulge area are formed in the bottom layer through the matching of the concave parts on the second roller and the second needle bodies on the third roller.

Further comprises: and an external barb opening is formed in the concave area F through the matching of the third roller and the fourth roller.

A sanitary article comprising the fibrous material described above.

One or more of the components of the surface layer, the flow guiding layer, the absorption core body, the waistline, the outer layer, the three-dimensional guard, the waist patch and the like of the sanitary article contain the composite fiber material.

The sanitary articles comprise baby diapers, adult diapers, baby pants, adult pants, incontinence pads, care towels, sanitary napkins, sanitary pads, puerperal towels, breast pads, liquid absorption pads, dry towels or wiping towels, menstrual pants, absorbent articles for pets and the like.

Advantageous effects

1. The double-layer composite fiber material is filled in a supporting way, and is good in three-dimensional retention, rebound and comfort and attractive. The forming of the perforated barbs can freely exert elastic force and deformation resistance when the non-woven fabric is stressed; the 3D bulges and the concave parts are alternately arranged, and simultaneously, the openings are added, so that the contact area is effectively reduced, and the ventilation and the air permeability are increased;

2. the diaper made of the fiber material of the invention as a surface layer or a diversion, sanitary towel or other disposable absorbent articles has good three-dimensional retention, rebound and deformation resistance, comfort and beautiful appearance, and the 3D bulge is matched with the holes and the concave parts to play roles, so that the contact area between the fiber product and the body is reduced, ventilation is improved, absorption is improved, dryness is improved, the infiltration and flow of liquid and thin feces are effectively managed, dryness is kept and allergy is reduced; can also be used for waistline and back layer of disposable absorbent articles such as diaper, etc., and can improve softness and aesthetic property.

3. In addition, the production method can effectively realize surface layer 3D bulge, positioning and punching on the 3D bulge and positioning and punching between the 3D bulge and the 3D bulge, effectively realize supporting filling and bottom layer compounding, and simultaneously well realize positioning and punching on the 3D bulge and the bottom layer.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic illustration of a single layer relief prior art fibrous material structure;

FIG. 2 is a schematic illustration of a two-layer hollow relief prior art fibrous material structure;

FIG. 3 is a schematic illustration of a three-layer solid filled relief prior art fibrous material structure;

FIG. 4 is a front elevational view of one embodiment of a nonwoven fabric of the present invention;

FIG. 5 is a cross-sectional view of a nonwoven fabric according to an embodiment of the present invention;

FIG. 6 is a view of a production apparatus for producing a nonwoven fabric according to the present invention;

FIG. 7 is a schematic view of the configuration of the engagement point locations and the materials at the engagement point for each roll;

FIG. 8 is a front elevational view of another embodiment of a nonwoven fabric of the present invention;

FIG. 9 is a cross-sectional view showing another embodiment of a nonwoven fabric according to the present invention;

FIG. 10 is a cross-sectional structural view of another embodiment of a nonwoven fabric of the present invention;

1. a first roller; 2-a second roller; 3-a third roller; 4-fourth roller; 5-composite part;

11. a protruding portion; 12. a first concave hole; 21. a recessed portion; 22. a first needle body; 23. a composite or adhesive portion; 31. a second needle body; 32. a second concave hole; 41. a third needle body;

E. a 3D bulge region; F. a recessed region; m, punching holes on the upper barbs; n, opening holes on the lower barbs; q, bonding part; l, bulge cavity; K. an external barb opening; r, 3D recessed region;

H. a surface layer; I. a bottom layer;

a-engagement state between first and second rollers

B-engagement state between the second roller and the third roller

C engagement state between third roller and fourth roller

Detailed Description

The present invention will be described in further detail with reference to the following specific embodiments. It will be appreciated by those skilled in the art that the following examples are illustrative of the present invention and should not be construed as limiting the scope of the invention. The specific techniques or conditions are not identified in the examples and are set forth in the specification in accordance with the techniques or conditions described in the literature in this field. References to "shape", "engagement", "thickness", "depth", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., of a device or element of the present invention are merely for convenience of description of the present invention and to simplify description, and do not indicate or imply that the device or element in question must be limited to the representation described.

The fiber material is formed by compositing and superposing a surface layer material and a bottom layer material, and the surface layer material is used for directly contacting with action parts such as skin, so that references to directions such as upper, surface layer, upper and the like in the specification of the invention refer to deflection to one side of the surface layer fabric under the condition of no special description; correspondingly, references to "below", "lower", "bottom", "lower" and the like refer to the side of the underlying material that is oriented.

In particular, the "horizontal" direction in the present invention refers to a direction parallel to the plane of the fibrous material.

As shown in fig. 4 and 5, the composite fiber material provided by the invention comprises a bottom layer I and a surface layer H. Wherein the surface layer comprises a 3D bulge region E and a recess region F (the 3D bulge region E and the recess region F are spaced apart from each other, which can be understood as a recess region formed outside the bulge region); the bonding part for realizing the combination of the bottom layer I and the surface layer H is positioned in the concave area, and is represented by bonding part Q in figure 5; wherein the surface layer is provided with an upper barb opening M penetrating through the surface layer in the surface area of the 3D bulge area E (the extending direction of the barbs is towards the inner part of the bulge); wherein, the bottom layer I material is provided with a lower barb opening N (the extending direction of the barb is towards the inside of the bulge) facing the bulge cavity L below the bulge area of the surface layer H material. When the fiber material is compounded with the surface layer material and the bottom layer material, an adhesive part Q for bonding the bottom layer material and the surface layer material and an external barb opening K penetrating through the bottom layer material and the surface layer material are arranged in the concave area of the upper layer material.

When the structure is adopted, the 3D bulge structure can effectively keep the appearance of the 3D bulge structure in the process of fabric manufacturing and rolling, and when the 3D bulge structure is extruded, the support structure formed by the upper barb open holes and/or the lower barb open holes can effectively provide support when the bulge is pressed and deformed, so that the cavity structure can be kept. The barb-shaped openings form a column-shaped support in the bulge cavity of the surface layer, so that the gas circulation of the inner cavity of the bulge is maintained, and the maintaining shape of the bulge is also maintained. And meanwhile, the perforation in the shape of the barb provides a penetration channel for liquid penetration and reduces the residue of liquid on the surface. Effectively reducing liquid rewet, reducing loose stool contact and adhesion to skin, and reducing skin allergy. The preparation method and the device of the fiber material can enhance dryness, air permeability, aesthetic property, comfort and experience, effectively realize product processing and simplify the process.

Further, the projected shape of the recessed area on the surface layer in the plane direction of the fibrous material may be dot-like, linear, planar, and combinations thereof; the projected shape of the bonding portion of the base layer and the surface layer material in the plane direction of the fibrous material may be dot-like, linear, planar, and combinations thereof.

Further, the 3D bulge areas are several; the projection areas of the 3D protruding parts and the adjacent 3D protruding parts in the plane direction of the non-woven fabric are the same or different, and the heights are the same or different; the 3D raised portions on the skin are partially connected or completely separated by recessed portions.

Further, the number of the upper barb openings M in the surface layer 3D bulge area is single or several, the opening parts are provided with barbs facing the inside of the bulge cavity, the lengths of the barbs can be different, and the lengths are smaller than or equal to the vertical heights in the bulge cavity. The barb and the center between the barbs exist in the process of opening holes are at a certain distance, the projection area of the root of the barb is 1-10 times of the projection area of the opening or the non-opening of the top of the barb (when the barb is regarded as a frustum shape, the tip of the frustum is the top of the barb, and the other end of the barb is the root of the barb, namely, the cross section area of the root of the barb is not smaller than the cross section area of the top).

Further, the number of the openings in the concave area of the surface layer material of the fiber material is single or a plurality, the opening part is provided with barbs extending upwards or downwards, and the projection area of the root parts of the barbs is 1-10 times of the projection area of the openings or the non-openings at the tops of the barbs.

Further, the bottom layer material has a single or a plurality of barb openings in the unit area below the inside of the cavity of the 3D bulge area of the surface layer, the opening portions have barbs extending toward the inside of the bulge cavity, the lengths of the barbs can be different, and the lengths are smaller than or equal to the vertical height inside the bulge cavity. The barbs are positioned at a certain distance from the center of the barbs when the holes are formed, and the holes and the barbs formed by the holes are positioned between the holes of the upper material and the cross gaps formed by the barbs formed by the holes. The projected area of the barb root is 1-10 times that of the opening or non-opening at the barb top.

Further, the projection of the opening barbs of the surface layer material and the projection of the opening barbs of the bottom layer material in the vertical direction can be partially or completely overlapped. The vertical direction here means the direction perpendicular to the plane of the nonwoven fabric.

Further, the projection area of the 3D bulge area is less than or equal to 500 square millimeters; the projected area ratio of the 3D bulge area to the 3D concave area is 100:1 and 1: between 100; the projection shape of the 3D bulge area on the non-woven fabric plane is diamond, oval, semi-cylindrical or other shapes; the height of the 3D protruding portion is 0.1mm to 10mm, and preferably, the height of the 3D protruding portion is 0.5mm to 5mm.

Based on the above technical concept, as shown in fig. 5, in one embodiment, the upper barb opening M and the lower barb opening N are both in a truncated cone shape and are staggered, and the sidewalls of the upper barb opening M and the lower barb opening N are attached to each other; when adopting such structure, because the lateral wall of round platform is the angle of certain slant, when last barb trompil M and down barb trompil N's lateral wall intermeshed, further formed mutual friction or compress tightly, played inside by last barb trompil M and down barb trompil N's further laminating support for three-dimensional structure's maintenance effect is better.

In addition, the direct lamination of the upper barb opening M and the lower barb opening N can be realized when manufacturing is completed, and the lamination support can be realized when the 3D bulge area E is pressed downwards for a certain distance (a certain distance can be generated by the bottom layer I upwards), so that the side walls of the upper barb opening M and the lower barb opening N are mutually laminated, on one hand, the requirement on processing precision is simplified, on the other hand, the lamination support can be realized when the bulge is deformed, and the inner side walls of the upper barb opening M and the lower barb opening N also have the advantage of keeping a three-dimensional structure.

In another embodiment, as shown in fig. 9, the sidewalls of the upper barb openings M and the lower barb openings N do not adhere to each other, and even after the surface layer H or the bottom layer I is displaced toward the inside of the bulge, the sidewalls cannot adhere to each other, but are supported by the contact between the tip of the upper barb opening M and the bottom layer I, or by the direct contact between the lower barb openings N and the surface layer H.

In another embodiment, as shown in fig. 10, a 3D recessed area R is further provided on the bottom layer I, which is similar to the 3D bulge area in shape but opposite in direction, and is formed by recessing below the bottom layer I, and the position of the lower barb opening N is located in the 3D recessed area R of the bottom layer I; meanwhile, in the left, middle and right positions in fig. 10, the vertical projections of the 3D concave region R and the 3D convex region E of the surface layer H are respectively shown to be entirely overlapped, partially overlapped or not overlapped.

The invention also provides a method and an apparatus for manufacturing the above-mentioned fibrous material, and in particular, as shown in fig. 6, an apparatus for producing such fibrous material comprises a first roll 1, a second roll 2, a third roll 3 and a fourth roll 4.

The surface of the roller body of the first roller 1 is provided with a protruding portion 11 protruding from the surface of the roller body, and a first concave hole 12 is formed in the protruding portion 11. The surface of the second roller 2 is provided with a concave part 21 which is matched with the convex part 11 on the first roller 1 and is concave towards the center of the second roller 2. The bottom of the concave portion 21 is provided with a first needle 22 protruding from the bottom surface, the first needle 22 cooperates with the first concave hole 12 on the convex portion 11 on the first roller 1 when the first roller 1 and the second roller 2 rotate, by such a structure, a 3D bulge can be formed by the convex portion on the first roller and the concave portion of the second roller when the pressure is increased, and simultaneously, the needle in the concave portion of the second roller cooperates with the concave portion inside the convex portion of the first roller to form a barb portion facing the bulge on the 3D bulge, and the barb can be formed by puncturing or not puncturing the surface layer. When the processing is carried out, the surface layer is fed between the first roller and the second roller, a 3D bulge area and a concave area are formed on the surface layer through the meshing between the first roller and the second roller, the surface layer is penetrated from top to bottom on the surface of the 3D bulge area of the surface layer through a needle body in a concave part of the second roller while the 3D bulge area is formed on the surface layer, so that through barb openings on the 3D bulge area of the surface layer are formed; the length of the first needle 22 should be smaller than the depth of the recess hole 12, and the number of the first needles 22 in one recess portion 21 may be one or more.

The second roll 2 is provided with raised flats between the depressions for the composite or bonding portions 23 between the two layers of material. During processing, the second roller 2 conveys the surface layer processed by the steps to rotate continuously, the bottom layer material enters the bottom surface of the surface layer material on the roller body of the second roller 3 and is subjected to ultrasonic wave, heat sealing, gluing or a combination thereof, and the bonding treatment of the double-layer material is performed, wherein the bonding treatment can be performed by adopting the existing ultrasonic wave compounding equipment, heat compounding equipment or gluing equipment and the like, as shown by a compounding mechanism 5 in fig. 6.

The third roller 3 is matched with the second roller 2, the surface of the third roller 3 is provided with a second needle body 31 protruding out of the roller surface, and the second needle body 31 penetrates into the position (for example, between the adjacent first needle bodies 22) of the non-first needle body 22 in the concave area 21 of the second roller 2 when the second roller 2 and the third roller 3 are mutually meshed. When the matching structure is adopted, the surface layer after punching through the first roller 1 and the second roller 2 can be compounded with the bottom layer, after the compounding, the 3D bulge is contained in the concave area 21 of the second roller, and the second needle body 31 on the third roller 3 is used for punching on the bottom layer, so that a barb structure facing the inside of the 3D bulge on the bottom layer is formed. During processing, the second roller conveys the surface layer and the bottom layer compounded fiber materials processed in the steps to continue rotating, and the fiber materials are conveyed between the third roller and the second roller; the needle body on the third roller is rotated by the cooperation of the second roller and the third roller, and the needle body pierces into the area of the bulge unit of the bottom material product. The underlying material is pierced and formed with barb openings into the bulge.

The surface of the third roller 3 is also provided with a second concave hole 32. The second concave hole is matched with a third needle body 41 on a boss arranged on the surface of the fourth roller 4. By means of the structure, the outer barb openings can be punched in the concave areas of the fabric again. When the processing step is executed, the third roller is used for binding the fiber material processed in the step 3 on the surface of the roller body of the third roller after punching through the third roller, and the needle body positioned on the boss of the fourth roller is penetrated into the concave area between the bulges which are already compounded through the mutual matching transmission of the third roller and the fourth roller. Barb openings formed in the recessed areas. The 3D bulge is located in a supporting space area between the bosses of the fourth roller.

The fiber material is applied to a disposable absorbent article, and one or more of the components of a surface layer, a diversion layer, an absorbent core, a waistline, an outer layer, a three-dimensional guard, a waist patch and the like of the disposable absorbent article contain the composite fiber material; the disposable absorbent article specifically includes baby diapers, adult diapers, baby pants, adult pants-type diapers, incontinence pads, care napkins, sanitary pads, parturient napkins, breast pads, absorbent pads, dry or wipe wipes, menstrual pants, absorbent articles for pets, and the like.

Example 1

The surface layer of the fiber material adopts 25 g/square meter whitened weak hydrophilic hot air non-woven fabric, and the bottom layer adopts 20 g/square meter strong hydrophilic Bai Refeng non-woven fabric, so as to prepare the double-layer composite fiber material shown in fig. 4 and 5. The diameter of the upper barb opening is about 2.5mm, the length of the upper barb is about 1.25mm, the diameter of the lower barb opening is about 2.5mm, and the length of the lower barb is about 1.2mm. The side barb opening aperture was about 2.5mm and the side barb length was about 1.25mm.

Example 2

The surface layer of the fiber material adopts 20 g/square meter whitened weak hydrophilic hot air non-woven fabric, the bottom layer adopts 18 g/square meter light blue strong hydrophilic hot air non-woven fabric, and the double-layer composite fiber material shown in fig. 4 and 5 is manufactured. The diameter of the upper barb opening is about 2.0mm, the length of the upper barb is about 1.0mm, the diameter of the lower barb opening is about 2.0mm, and the length of the lower barb is about 1.0mm. The side barb opening aperture was about 2.0mm and the side barb length was about 1.0mm.

Example 3

The surface layer of the fiber material adopts 35 g/square meter whitening strong hydrophilic hot air non-woven fabric, and the bottom layer adopts 35 g/square meter whitening strong hydrophilic hot air non-woven fabric, so that the double-layer composite fiber material shown in figure 9 is manufactured. The diameter of the upper barb opening is about 3.0mm, the length of the upper barb is about 1.8mm, the diameter of the lower barb opening is about 3.0mm, and the length of the lower barb is about 1.8mm. The side barb opening aperture was about 2.0mm and the side barb length was about 1.0mm.

Comparative example 1

The difference compared to the material in example 1 is that: only the upper barb openings M are punched, and the lower needling openings N are not punched.

Table 1 shows a comparison of example 1 and comparative example 1 in thickness retention:

TABLE 1

As can be seen from a comparison of table 1, the lower needled openings N effectively improved the deformation resistance and the deformation recovery properties of the material.

Comparative example 2

The same materials as in example 2 were used, with the difference that: the two-layer composite material described in fig. 2 was produced.

Absorption rate comparison test: the test was carried out using a fibrous material obtained in this example 2 as a top sheet (comparative example 2), 80 ml of physiological saline was injected into the test block at one time and placed on the same KSC standard diaper absorbent material, a nonwoven fabric and a three-layer structure fibrous product of the present invention were placed on the absorbent material, the decrease rate of the physiological saline level in the test block was observed to indicate the absorption rate, and the absorption time (in seconds) was recorded when the liquid level completely disappeared, as prescribed by the test method for rewet of the diaper according to the national standard; smaller numbers indicate faster absorption rates and test data are shown in table 2 below:

TABLE 2

As can be seen from table 2 above, the fibrous material of example 2 according to the present invention absorbs more rapidly than comparative example 2.

Dry and refreshing test: in the test of the experiment, a platen having a planar area of 100 x 100 and a weight of 0.5kg and a standard weight of 5kg having the same weight were pressed against the platen, and the fiber material of the present invention of this example 2 and the composite fiber material of comparative example 2 were respectively pressed at room temperature for 48 hours, and then the platen and the standard weight were removed and left for 24 hours, and then the change in dryness in the initial state (before no pressing) and dryness after rebound under pressing were compared. The dryness was evaluated by the rewet amount, and the lower the rewet amount, the better the dryness. The dry and comfortable test method is that the surface layer material for test is placed on the absorber, 80 ml of physiological saline is poured in twice, 5 minutes is reserved between the two times, then 10 layers of standard filter paper are placed on the surface layer after the surface layer is placed for 1 minute, a 2.5KG pressing block is pressed, after one minute of pressing, the weight change of the filter paper is tested, the weight change is recorded as the rewet quantity, and the lower the number is, the lower the rewet quantity is, and the better the dry and comfortable property is.

TABLE 3 Table 3

From the test results dryness control table 3, it can be seen that the fibrous material of the present invention is significantly better than the fibrous material of comparative example 2.

Comparative example 3

The difference compared to the material in example 1 is that: the side barb openings in recessed area F are omitted.

Absorption rate comparison test: the test was conducted by using one fiber material obtained in this example 1 as a top layer (comparative example 3), 80 ml of physiological saline was injected into the measuring block at one time and placed on the same KSC standard diaper absorbent material according to the specification of the test method for rewet of diapers in the national standard, a nonwoven fabric and a three-layer structure fiber product of the present invention were placed on the absorbent material, the decrease rate of the physiological saline level in the measuring block was observed to indicate the absorption rate, and the absorption time (in seconds) was recorded when the liquid level completely disappeared; smaller numbers indicate faster absorption rates and test data are shown in table 4 below:

TABLE 4 Table 4

As can be seen from Table 4 above, the fibrous material of example 1 of the present invention absorbs more rapidly than comparative example 3.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention fall within the scope of the technical solutions of the present invention.

Claims

1. A fibrous facer comprising:

a surface layer (H) and a bottom layer (I);

the upper part area of the surface layer (H) is bulged to form a 3D bulge area (E), and a bulge cavity (L) is formed in the 3D bulge area (E);

the upper barb opening (M) is formed by extending the surface layer (H) of the 3D bulge area (E) into the bulge;

a lower barb opening (N) positioned on the bottom layer (I) and extending towards the surface layer (H);

the ratio of the horizontal sectional area of one end of the surface layer (H) to the horizontal sectional area of the other end of the surface layer (H) is 1-10:1, a step of; the ratio of the horizontal sectional area of one end of the bottom layer (I) to the horizontal sectional area of the other end of the bottom layer (I) is 1-10:1, a step of; the length of the upper barb opening (M) and/or the lower barb opening (N) is 0.1mm-10mm.

2. The fiber fabric according to claim 1, wherein the lower barb openings (N) are formed by extending the bottom layer (I) below the 3D bulge area (E) into the bulge.

3. Fiber facing according to claim 1, characterized in that in one 3D bulge area the number of upper barb openings (M) and/or lower barb openings (N) is one or more.

4. The fibrous face fabric according to claim 1, wherein the cross-section of the upper barb openings (M) and/or the lower barb openings (N) in the horizontal direction is circular or polygonal in shape and the three-dimensional shape is cylindrical or pyramidal.

5. The fibrous face fabric according to claim 1, wherein the sides of the upper barb openings (M) and the lower barb openings (N) are capable of contacting each other when the upper barb openings (M) and/or the lower barb openings (N) are displaced a distance towards the interior of the 3D bulge area or not.

6. The fiber fabric of claim 1, further comprising: an adhesive part (Q) for compounding the surface layer (H) and the bottom layer (I) with each other;

further comprises: an external barb opening (K) located in a non-3D bulge area on the fibrous material, formed by a skin layer (H) and a bottom layer (I); the direction of the outer barb opening (K) is the direction facing away from the surface layer (H).

7. The fiber fabric according to claim 1, wherein the bottom layer (I) is provided with a 3D recessed area (R), the 3D recessed area (R) being in a direction facing away from the surface layer (H); and the lower barb openings (N) are located within the 3D recessed region (R).

8. The fibrous face fabric according to claim 7, characterized in that the vertical projection of the 3D recessed area (R) provided by the bottom layer (I) and the 3D bulge area (E) of the surface layer (H) are wholly, partly or non-coincident.

9. The apparatus for producing a fiber fabric according to claim 1, comprising:

a first roller (1), a second roller (2), and a third roller (3);

the first roller (1) is provided with a protruding part (11), and the protruding part (11) is provided with a first concave hole (12);

the second roller (2) is provided with a concave part (21) matched with the convex part (11), and the bottom of the concave part (21) is provided with a first needle body (22) matched with the first concave hole (12); a composite or adhesive part (23) is also provided for compositing the surface layer (H) and the bottom layer (I);

the third roller (3) is provided with a second needle body (31) matched with the concave part (21).

10. The device for preparing the fiber fabric according to claim 9, further comprising a fourth roller (4), wherein the third roller (3) is provided with a second concave hole (32) matched with a third needle body (41) on the fourth roller (4), and the second concave hole is used for forming an external barb opening (K) on the outer part of a 3D bulge area (E) formed by pressing the first roller (1) and the second roller (2).

11. A method for preparing the fiber fabric of claim 1, comprising the steps of:

forming a 3D bulge area (E) and a recess area (F) on the skin layer (H) by the cooperation of the first roller (1) and the second roller (2); and forming an upper barb opening (M) on the 3D bulge region (E) by the mating of the first recess (12) and the first needle (22) while forming the 3D bulge region (E);

compounding the side of the surface layer (H) facing away from the 3D bulge area (E) with the bottom layer (I) through the first roller (1) and the second roller (2);

a lower barb opening (N) facing the inside of the 3D bulge area (E) is formed on the bottom layer (I) through the matching of the concave part (21) on the second roller (2) and the second needle body (31) on the third roller (3).

12. The method of making a fibrous facestock of claim 11, further comprising: and an external barb opening is formed in the concave area (F) through the matching of the third roller (3) and the fourth roller (4).

13. A sanitary article comprising the fibrous material of any one of claims 1-7.

14. The sanitary product of claim 13, wherein the sanitary product is selected from the group consisting of baby diapers, adult diapers, incontinence pads, caregivers, sanitary napkins, pantiliners, parturient napkins, breast pads, absorbent pads, dry wipes, menstrual pants, and absorbent products for pets.