CN114654818A - Fiber material, preparation method and device and sanitary product - Google Patents

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 device and a sanitary product. This composite fiber material can effectively solve the three-dimensional retentivity that exists in current individual layer or the bilayer technique poor in the use, the anti deformability is poor, the comfort level is not good, the poor scheduling problem of elasticity, this fiber material is through going up/down barb trompil and lateral part barb open pore structure in the 3D swell, the support of inner structure has been formed, the increase third dimension has been realized, elasticity and anti deformability, further reduce area of contact, improve the circulation of air performance, increase dry and comfortable nature, the gas permeability, the travelling comfort, aesthetic property and experience feel, effectively reduce liquid infiltration and effectively reduce rare just contact and adhere to skin, reduce skin allergy.

Description

A kind of fiber material, preparation method, device and sanitary article

technical field

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

Background technique

In the known technology, the single-layer textured perforated fiber product has a concave-convex bulge shape and a certain three-dimensional effect, but the single-layer textured perforated fiber product has the following defects and unsolved problems (as shown in Figure 1):

A. The three-dimensional retention of single-layer textured fiber products is very poor, and the thickness and three-dimensional effect will be greatly reduced when they are made into roll materials;

B. Especially when it is used to make diapers or sanitary napkins, the three-dimensional effect will be greatly reduced due to the stretching of the manufacturing process and the use of glue to bond to other materials;

C. It will also affect the breathability and dryness;

D. The degree of aesthetics will also be affected.

Another double-layer composite fiber product on the market now: the surface layer is made into a 3D hollow three-dimensional, and the bottom layer is supported by thermal bonding; this fiber product is better than the above-mentioned double-layer product in terms of taste and color, but the above-mentioned heat sealing The hollow three-dimensional bilayer still has the following defects and unsolved problems (as shown in Figure 2):

A. In the winding process of the production process, the 3D hollow three-dimensional lack of support will become flat, and the shape will become crooked and irregular;

B. When using this material to make products such as diapers and sanitary napkins, the process stretching will further reduce the 3D three-dimensional effect and softness;

C. The decline of the three-dimensional effect will affect the penetration performance, customer comfort, three-dimensional sense and aesthetics.

Now there is also a three-layer composite fiber product: the surface layer is made of 3D protrusions, the filling layer fills the entire bulging cavity of the 3D protrusions, and the bottom material acts as a bonding support. However, the above-mentioned heat-sealed hollow three-dimensional double layer still has the following defects and unsolved problems (as shown in Figure 3):

A. During the winding process, due to the existence of the filling layer, the support for the bulge is relatively strong, resulting in a significantly harder three-dimensional feeling of the bulge and a strong sense of contact between the bumps.

B. There are also perforations on the bulge, but due to the existence of the filling layer, the liquid infiltration is blocked, and the ventilation effect and gas circulation are affected.

C. The use of three-layer materials increases the cost of use and the thickness of the product, which has a certain impact on ventilation and moisture removal.

SUMMARY OF THE INVENTION

The technical problems to be practically solved by the present invention are: the deformation resistance of the bulge on the conventional double-layer fiber fabric is poor, the structure is not easy to maintain, and the filler in the bulge in the three-layer composite material will lead to poor permeability/air permeability The problem. The invention provides a composite fiber material, which can effectively solve the problems of poor three-dimensional retention, poor deformation resistance, poor comfort, and poor elasticity in the existing single-layer or double-layer technology during use. , The fiber material forms the support of the internal structure through the upper/lower barb opening and the side barb opening structure in the 3D bulge, realizing the increase of three-dimensional effect, elasticity and deformation resistance, and further reducing the contact area, Improve air circulation performance, increase dryness, breathability, comfort, aesthetics and experience, effectively reduce liquid re-infiltration, effectively reduce loose stool contact and adhesion to the skin, and reduce skin allergies.

A fibrous material comprising:

surface and bottom layer;

The upper part of the surface is raised to form a 3D bulge area, and the interior of the 3D bulge area E is a bulge cavity L;

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

The lower barb opening is formed by the bottom layer under the 3D bulge area extending to the inside of the bulge.

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

The shape of the horizontal section of the upper barb opening and/or the lower barb opening is a circle or a polygon, and the three-dimensional shape is a cylinder or a cone.

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

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

The length of the upper barb opening and/or the lower barb opening is 0.1mm-10mm.

When the upper and/or lower barb openings are displaced a certain distance or not toward the interior of the 3D bulge area, the sides of the upper and lower barb openings can contact each other.

Also included: an adhesive portion for bonding the surface layer and the bottom layer to each other.

Also included: external barbed openings, non-3D bulging areas on the fibrous material, formed by the top and bottom layers.

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

A preparation device for fiber material, comprising:

The first roll, the second roll, the third roll;

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

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 compound or adhesive part is also provided for Composite the surface layer and the bottom layer;

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

It also includes a fourth roller, and the third roller is provided with a second concave hole matched with the third needle body on the fourth roller, for opening outside the 3D bulge area pressed by the first roller and the second roller Outer barb opening.

A preparation method of fiber material, comprising the steps:

A 3D bulge area and a concave area are formed on the surface layer through the cooperation of the first roller and the second roller; and while the 3D bulge area is formed, the upper barb is formed on the 3D bulge area through the cooperation of the first concave hole and the first needle body. opening;

The side facing away from the 3D bulge area on the surface layer is combined with the bottom layer 1 through the matching of the second roller and the third roller 3;

Through the cooperation of the concave portion on the second roller and the second needle body on the third roller, a lower barb opening is opened on the bottom layer toward the inside of the 3D bulging area.

It also includes: opening external barb openings on the concave area F through the cooperation of the third roller and the fourth roller.

A sanitary article, comprising the above-mentioned fibrous material.

One or more of the components such as the surface layer, the guide layer, the absorbent core, the waistline, the outer layer, the three-dimensional protector, and the waist tape of the sanitary article contain the composite fiber material.

The sanitary products include baby diapers, adult diapers, baby trousers diapers, adult trousers diapers, incontinence pads, nursing napkins, sanitary napkins, sanitary pads, maternity napkins, breast pads, absorbent pads, dry wipes or wipes, menstrual pants, absorbent products for pets, etc.

beneficial effect

1. The double-layer composite fiber material of the present invention adopts supportive filling, and has good three-dimensional retention, good resilience, and good comfort and aesthetics. The formation of perforated barbs can also freely exert the elastic force and the ability to resist deformation when the non-woven fabric is under pressure; the 3D convex and concave parts appear alternately, and the addition of openings can effectively reduce the contact area and increase air circulation and ventilation. sex;

2. Diapers, sanitary napkins or other disposable absorbent articles made of the fiber material of the present invention as a surface layer or a diversion have good three-dimensional retention, good resilience and deformation resistance, good comfort and aesthetics, and 3D convexity. It works together with openings and recessed parts to reduce the contact area between fiber products and the body, improve breathability, improve absorption, improve dryness, effectively manage the infiltration and flow of liquids and loose stools, keep dryness and reduce allergies; also available It is used in the waistline and back layer of disposable absorbent articles such as diapers to improve softness and aesthetics.

3. In addition, by using the production method of the present invention between the forming rollers of the present invention, the surface layer 3D bulge, the positioning and punching on the 3D bulge, and the positioning and punching between the 3D bulge and the 3D bulge can be effectively realized. While achieving supportive filling and bottom layer compounding, it can also well realize the positioning and punching of 3D protrusions and bottom layers.

Description of 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 the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

1 is a schematic diagram of the structure of a single-layer concave-convex prior art fiber material;

Fig. 2 is a schematic diagram of the structure of a double-layer hollow concave-convex prior art fiber material;

3 is a schematic diagram of the structure of a three-layer solid-filled concave-convex prior art fiber material;

Fig. 4 is a frontal structural view of an embodiment of a nonwoven fabric of the present invention;

5 is a cross-sectional structural view of an embodiment of a nonwoven fabric of the present invention;

Fig. 6 is the production device diagram of producing a kind of non-woven fabric of the present invention;

Figure 7 is a schematic diagram of the meshing point position of each roller body and the structure of the material at the meshing point;

Fig. 8 is a frontal structural view of another embodiment of a nonwoven fabric of the present invention;

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

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

1. The first roller; 2- the second roller; 3- the third roller; 4- the fourth roller; 5- composite parts;

11, the convex part; 12, the first concave hole; 21, the concave part; 22, the first needle body; 23, the compound or adhesive part; 31, the second needle body; 32, the second concave hole; 41, the first three needles;

E, 3D bulging area; F, concave area; M, upper barb opening; N, lower barb opening; Q, bonding part; L, bulging cavity; K, external barb opening; R, 3D recessed area;

H, surface layer; I, bottom layer;

A-The meshing state between the first roller and the second roller

B-The meshing state between the second roller and the third roller

C-The meshing state between the third roller and the fourth roller

Detailed ways

The present invention will be further described in detail below through specific embodiments. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be construed as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, the technique or condition described in the literature in this field shall be followed in accordance with the specification. The "shape", "engagement", "thickness", "depth", "height", "upper", "lower", "front", "rear", "left", The expressions "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that The device or element referred to must be in the expression stated to limit the invention.

A fibrous material mentioned in the present invention is composed of a composite and superimposed surface layer and a bottom layer material, and the surface layer material is used to directly contact the skin and other active parts. , "surface", "upper" and other orientations refer to the side of the surface fabric unless otherwise specified; correspondingly, "below", "bottom", "bottom", References to an orientation such as "lower" refer to the side facing the underlying material.

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

As shown in FIG. 4 and FIG. 5 , the composite fiber material provided by the present invention includes a bottom layer I and a surface layer H. Wherein, the surface layer includes a 3D bulge area E and a concave area F (the 3D bulge area E and the concave area F are spaced apart from each other, which can be understood as a concave area formed outside the bulge area); the bottom layer I and the surface layer H are realized. The bonding part of the layer composite is located in the recessed area, which is represented by the bonding part Q in FIG. 5; wherein, the surface layer has an upper barb opening M (barb) that penetrates the surface layer in the surface area of the 3D bulge area E. The protruding direction is towards the inside of the bulge); wherein, the bottom layer I material has the lower barb opening N in the bulge cavity L under the surface layer H material bulge area (the barb's protruding direction is toward the bulge area). inside the drum kit). Wherein, when the surface layer material and the bottom layer material are composited, the fiber material is provided with a bonding portion Q for bonding the bottom layer material and the surface layer material and an external barb opening K passing through the bottom layer and the surface layer material in the concave area of the upper layer material. .

When the above structure is adopted, the 3D bulge structure can effectively maintain its shape during the process of fabric manufacturing and winding, and when squeezed, upper barb openings and/or lower barb openings are formed. The supporting structure can effectively provide support when the bulge is compressed and deformed, so that the cavity structure can be maintained. Since the barb-shaped openings form a "pillar"-shaped support in the surface bulge cavity, it not only maintains the gas circulation in the bulge inner cavity but also maintains the shape of the bulge. At the same time, the existence of the barb-shaped perforation provides a penetration channel for liquid penetration and reduces the residue of liquid on the surface. Effectively reduce liquid re-infiltration and effectively reduce loose stool contact and adhesion to the skin, reducing skin allergies. To enhance dryness, air permeability, aesthetics, comfort and experience, the preparation method and device of the fiber material effectively realizes product processing and simplifies the process.

Further, the projected shape of the concave area on the surface layer in the plane direction of the fiber material can be point shape, line shape, plane shape and their combination; The projected shape in the plane direction can be point, line, plane and their combination.

Further, the 3D bulge area is several; and the projected area of the 3D convex portion and the adjacent 3D convex portion on the plane direction of the non-woven fabric is the same or different, and the height is the same or different; the surface layer The 3D raised parts on the top are partially connected or completely separated by the recessed parts.

Further, the upper barb opening M on the described surface layer 3D bulge area is single or several, and the opening part has the barb to the inside of the bulge cavity, and the length of the barb can be different, and the length is less than or equal to the bulge cavity. vertical height inside. There is a certain distance between the barb and the center of the barb when the hole is opened, and the projected area of the barb root is 1-10 times the projected area of the opening or no opening at the top of the barb (when the barb is regarded as a In the case of a frustum, the tip of the frustum is the top of the barb, and the other end is the root of the barb, that is, the cross-sectional area of the root of the barb is not less than the cross-sectional area of the top).

Further, the openings on the concave area of the surface material of the fiber material are single or several, the openings have barbs extending upward or downward, and the projected area of the barb roots is the opening of the barb top or not. 1-10 times the projected area of the opening.

Further, the bottom layer material has a single or several barb openings in the unit area below the cavity of the surface layer 3D bulge area, and the opening part has a barb extending to the inside of the bulge cavity, and the length of the barb can be Different, the length is less than or equal to the vertical height inside the bulge cavity. There is a certain distance between the barbs existing during the opening and the center of the barbs, and the openings and the barbs formed by the openings exist between the openings of the upper material and the intersecting gaps formed by the barbs forming the openings. The projected area of the base of the barb is 1-10 times the projected area of the open or unopened top of the barb.

Further, the projections in the vertical direction of the openings and barbs of the surface layer material and the openings and barbs of the bottom layer material may partially or completely overlap. The vertical direction here refers to the direction perpendicular to the plane of the non-woven fabric.

Further, the projected area of the 3D bulge area is less than or equal to 500 square millimeters; the projected area ratio of the 3D bulge area and the concave area is between 100:1 and 1:100; the 3D bulge area is on the non-woven fabric plane. The projected shape on the upper part is a rhombus, an ellipse, a semi-cylindrical shape or other shapes; the height of the 3D convex part is 0.1mm-10mm, preferably, the height of the 3D convex part is 0.5mm-5mm.

Based on the above technical concept, an embodiment is shown in FIG. 5 , the upper barb opening M and the lower barb opening N are both truncated cones and are staggered from each other, and the upper barb opening M and the lower barb opening are The side walls of N are attached to each other; when such a structure is adopted, since the side walls of the truncated cone are at a certain oblique angle, when the side walls of the upper barb opening M and the lower barb opening N are attached to each other, further Mutual friction or pressing is formed, and the interior is further supported by the upper barb opening M and the lower barb opening N, so that the retention effect of the three-dimensional structure is better.

In addition, it is not necessary to realize the direct bonding of the upper barb opening M and the lower barb opening N when the manufacturing is completed. produce a certain distance), and then make the side walls of the upper barb opening M and the lower barb opening N fit each other. This manufacturing method simplifies the requirements of machining accuracy on the one hand, and on the other hand, can also realize the When the deformation occurs, the side walls of the inner upper barb opening M and the lower barb opening N also realize the fitting support, which also has the advantage of maintaining the three-dimensional structure.

In another embodiment, as shown in FIG. 9 , the side walls of the upper barb opening M and the lower barb opening N do not fit together, and even after the surface layer H or the bottom layer I is displaced toward the inside of the bulge, it still cannot be The sticking of the side walls is realized, but the support is realized by the contact between the tip of the upper barb opening M and the bottom layer I, or the support is realized by the direct contact between the lower barb opening N and the surface layer H.

In another embodiment, as shown in FIG. 10 , the bottom layer I is also provided with a 3D concave area R, which is similar in shape to the 3D bulge area, but in the opposite direction. The position where the puncture hole N is located is in the 3D concave area R of the bottom layer I; at the same time, in the left, middle and right positions in FIG. 10, the 3D concave area R and the 3D bulge area E of the surface layer H are respectively shown The vertical projections are all coincident, partially coincident or not.

The present invention also provides a method and equipment for manufacturing the above-mentioned fibrous material, specifically as shown in FIG. .

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 provided inside the protruding portion 11 . The surface of the roller body of the second roller 2 is provided with a concave portion 21 which is matched with the protruding portion 11 on the first roller 1 and is recessed toward the center of the roller body of the second roller 2 . The bottom of the concave part 21 is provided with a first needle body 22 protruding from the bottom surface. Through such a structure, a 3D bulge can be formed by using the convex part on the first roller and the concave part of the second roller when pressing, and at the same time, the needle body in the concave part of the second roller and the first roller can be used again. The concave part inside the protruding part is matched to form a barb part on the 3D drum bag facing the inside of the drum bag. This barb can either pierce the surface layer or not. During processing, the surface layer is fed between the first roller and the second roller, and the 3D convex area and the concave area are formed on the surface layer through the meshing between the first roller and the second roller, and the 3D convex area is formed on the surface layer. While lifting the area, the needle body in the concave portion of the second roller pierces the surface layer from top to bottom on the surface of the 3D convex area of the surface layer to form a through barb opening on the 3D convex area of the surface layer; the first needle body The length of the 22 should be smaller than the depth of the concave hole 12, and the number of the first needle bodies 22 in one concave portion 21 may be one or more.

Said second roller 2 is provided with a convex plane between the concave parts for the compounding or bonding part 23 between the two layers of materials. During processing, the second roller 2 conveys the surface layer treated in the above steps and continues to rotate, and the bottom layer material passes through the bottom surface of the upper surface layer material entering the roller body of the second roller 3 and then undergoes ultrasonic waves, heat sealing, gluing or their combination to carry out the double layer material. Bonding treatment, the bonding treatment here can be implemented by using existing ultrasonic compounding equipment, thermal compounding equipment or gluing equipment, etc., as shown in compounding mechanism 5 in FIG. 6 .

The third roller 3 and the second roller 2 cooperate with each other. There is a second needle body 31 protruding from the roller surface on the surface of the roller body of the third roller 3. The second needle body 31 is on the second roller 2 and the third roller 3. When they are engaged with each other, they penetrate into the recessed area 21 of the second roller 2 at positions other than the first needle bodies 22 (for example, between adjacent first needle bodies 22 ). When such a matching structure is adopted, the surface layer and the bottom layer after being punched by the first roller 1 and the second roller 2 can be composited, and the composite 3D drum can be wrapped in the concave area 21 accommodated in the second roller, and passed through the third roller. The second needle body 31 on the roller 3 is perforated on the bottom layer to form a barb structure on the bottom layer facing the inside of the 3D bulge. During processing, the second roller conveys the surface layer and the bottom layer composite fiber material treated in the above steps to continue to rotate, and is sent between the third roller and the second roller; the needle body on the third roller passes through the second roller and the third roller. The cooperating rotation of the needle body penetrates into the area of the bulging unit of the bottom material product. The base material is pierced and formed with barbed openings into the bulge.

The surface of the third roller 3 is further provided with second concave holes 32 . The second concave hole cooperates with the third needle body 41 on the boss provided on the surface of the roller body of the fourth roller 4 . With this structure, it is possible to re-punch the outer barb openings in the recessed areas of the fabric. When the processing step is performed, the third roller will make the fiber material processed in the third step, and then fit the surface of the third roller body after punching by the third roller. The needles on the bosses of the stabs pierce the concave area between the bulge that has been compounded and the bulge. Barbed openings are formed in the recessed areas. The 3D bulge is located in the support space area between the bosses of the fourth roller.

The above-mentioned fiber material is applied to a disposable absorbent article, one or more of the components such as the surface layer, the guide layer, the absorbent core, the waistline, the outer layer, the three-dimensional guard, and the waist tape of the disposable absorbent article. Contains the composite fiber material; the disposable absorbent articles specifically include baby diapers, adult diapers, baby trousers diapers, adult trousers diapers, incontinence pads, nursing napkins, sanitary napkins, sanitary pads, maternity diapers wipes, breast pads, absorbent pads, dry wipes or wipes, menstrual pants, absorbent products for pets, etc.

Example 1

The surface layer of the fiber material is made of 25 g/m2 whitening weakly hydrophilic hot air non-woven fabric, and the bottom layer is made of 20 g/m2 strong hydrophilic whitening hot air non-woven fabric to make the double-layer composite fiber material shown in Figure 4 and Figure 5. . The diameter of the upper barb opening is about 2.5 mm, the length of the upper barb is about 1.25 mm, the diameter of the lower barb opening is about 2.5 mm, and the length of the lower barb is about 1.2 mm. The hole diameter of the side barb is about 2.5mm, and the length of the side barb is about 1.25mm.

Example 2

The surface layer of the fiber material is made of 20 g/m2 whitening weakly hydrophilic hot air non-woven fabric, and the bottom layer is made of 18 g/m2 light blue strong hydrophilic hot air non-woven fabric to make the double-layer composite fiber shown in Figure 4 and Figure 5. Material. The diameter of the upper barb opening is about 2.0 mm, the length of the upper barb is about 1.0 mm, the diameter of the lower barb opening is about 2.0 mm, and the length of the lower barb is about 1.0 mm. The hole diameter of the side barb is about 2.0mm, and the length of the side barb is about 1.0mm.

Example 3

The surface layer of the fiber material is made of 35 g/m2 whitening strong hydrophilic hot air non-woven fabric, and the bottom layer is made of 35 g/m2 whitening strong hydrophilic hot air non-woven fabric to make the double-layer composite fiber material shown in Figure 9. The diameter of the upper barb opening is about 3.0 mm, the length of the upper barb is about 1.8 mm, the diameter of the lower barb opening is about 3.0 mm, and the length of the lower barb is about 1.8 mm. The hole diameter of the side barb is about 2.0mm, and the length of the side barb is about 1.0mm.

Comparative Example 1

Compared with the material in Example 1, the difference is that only the upper barb opening M is punched, and the lower needle punching hole N is not punched.

Table 1 shows a comparison of Example 1 and Comparative Example 1 in thickness retention:

Table 1

It can be seen from the comparison in Table 1 that the lower acupuncture hole N effectively improves the deformation resistance and deformation recovery performance of the material.

Comparative Example 2

The same material is used as in Example 2, the difference is: the double-layer composite material described in FIG. 2 is made.

Absorption speed comparison test: a kind of fibrous material obtained in the present embodiment 2 is used as the surface layer to be tested (with Comparative Example 2 as a comparison), according to the provisions of the national standard about the test method of diaper re-osmosis, use 80 milliliters of normal saline disposable Inject the measuring block and place it on the same KSC standard diaper absorbing material, place a non-woven fabric and a three-layer structure fiber product of the present invention on the absorbing material, and observe the drop of the liquid level of the physiological saline in the measuring block to indicate the absorption speed, Record the absorption time (in seconds) when the liquid level disappears completely; the smaller the number, the faster the absorption speed. The test data are shown in Table 2 below:

Table 2

It can be seen from the above Table 2 that the absorption speed of the fiber material of Example 2 of the present invention is faster than that of Comparative Example 2.

Dryness test: In the test of the experiment, press the platen with a plane area of 100*100, a weight of 0.5kg and a standard weight of 5kg of the same weight to press the platen, respectively, on the fiber material of the present invention and The composite fiber material of Comparative Example 2 was placed at room temperature for 48 hours, and then the pressing plate and standard weight were removed. After 24 hours, the dryness in the initial state (before no pressure) and the dryness after pressure rebound were compared. sexual changes. The dryness is judged by the amount of rewet. The lower the amount of rewet, the better the dryness. The test method of dryness is to place the test surface material on the absorber, pour 80 ml of normal saline in two times, with a 5-minute interval between the two times, and then place it for 1 minute, then put it on the surface layer and then put it on the surface. 10 layers of standard filter paper, pressed on a 2.5KG briquetting block, after one minute of pressing, test the weight change of the filter paper and record it as the rewet amount, in grams, the smaller the number, the lower the rewet amount and the better the dryness.

table 3

It can be seen from the dryness comparison table 3 of the test results that the fiber material of the present invention is obviously better than the fiber material of the comparative example 2.

Comparative Example 3

Compared to the material in Example 1, the difference is that the side barb openings in the recessed area F are omitted.

Absorption speed comparison test: a kind of fiber material obtained in this example 1 is used as the surface layer to test (with Comparative Example 3 as a comparison), according to the provisions of the national standard about the test method of diaper re-infiltration, use 80 milliliters of normal saline disposable Inject the measuring block and place it on the same KSC standard diaper absorbing material, place a non-woven fabric and a three-layer structure fiber product of the present invention on the absorbing material, and observe the drop of the liquid level of the physiological saline in the measuring block to indicate the absorption speed, Record the absorption time (in seconds) when the liquid level disappears completely; the smaller the number, the faster the absorption speed. The test data are shown in Table 4 below:

Table 4

It can be seen from Table 4 above that the absorption rate of the fiber material of Example 1 of the present invention is faster than that of Comparative Example 3.

The above are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are It belongs to the scope of the technical solution of the present invention.

Claims (14)

1. A fibrous material, comprising:

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

the upper part of the surface layer (H) is raised to form a 3D bulging area (E), and a bulging cavity (L) is arranged inside the 3D bulging area (E);

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

and the lower barb open pore (N) is positioned on the bottom layer (I) and extends towards the surface layer (H) to form.

2. The fibrous material according to claim 1, characterized in that said lower barb openings (N) are formed by a bottom layer (I) below the 3D bulge area (E) protruding towards the interior of the bulge.

3. Fibrous material 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 material according to claim 1, characterized in that the shape of the horizontal cross section of the upper barbed aperture (M) and/or the lower barbed aperture (N) is circular or polygonal and the cubic shape is cylindrical or conical.

5. The fibrous material according to claim 1, characterized in that the horizontal cross-sectional area of said barbed openings (M) at one end of the skin (H) is such that the ratio of the horizontal cross-sectional area at the other end is between 1 and 10: 1; the ratio of the horizontal sectional area of the lower barb open pore (N) at one end of the bottom layer (I) to the horizontal sectional area at the other end is 1-10: 1; the length of the upper barb open pore (M) and/or the lower barb open pore (N) is 0.1mm-10 mm.

6. Fibrous material according to claim 1, characterized in that the side parts of the upper barb opening (M) and the lower barb opening (N) are able to contact each other when the upper barb opening (M) and/or the lower barb opening (N) are displaced a certain distance or not towards the inside of the 3D bulge area.

The fibrous material of claim 1, further comprising: a bonding section (Q) for bonding the surface layer (H) and the base layer (I) to each other;

further comprising: an exterior barb cut (K) located in a non-3D bulge region on the fibrous material formed by a surface layer (H) and a bottom layer (I); the direction of the external barb open pore (K) is the direction back to the surface layer (H).

7. Fibrous material according to claim 1, characterized in that said bottom layer (I) is provided with 3D recessed areas (R), said 3D recessed areas (R) being directed away from the top layer (H); and the lower barb opening (N) is located in the 3D recessed area (R).

8. Fibrous material according to claim 8, characterized in that the 3D depressed areas (R) provided by said bottom layer (I) and the 3D bulged areas (E) of said top layer (H) are all coincident, partially coincident or non-coincident in their perpendicular projection.

9. An apparatus for preparing a fibrous material, comprising:

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

the first roller (1) is provided with a convex part (11), and the convex 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 arranged for compounding 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. A device for preparing fibrous material according to claim 9, characterised in that it comprises a fourth roller (4), the third roller (3) being provided with second recesses (32) cooperating with the third needles (41) of the fourth roller (4) for forming external barb openings (K) in the outer part of the 3D bulge area (E) formed by pressing the first roller (1) and the second roller (2).

11. A method for preparing a fibrous material, comprising the steps of:

forming a 3D bulging region (E) and a recessed region (F) on the surface layer (H) by the cooperation of the first roller (1) and the second roller (2); and forming an upper barb open pore (M) on the 3D bulge area (E) through the matching of the first concave hole (12) and the first needle body (22) while forming the 3D bulge area (E);

compounding the bottom layer (I) with one side, back to the 3D bulging area (E), of the surface layer (I) through the matching of the first roller (1) and the second roller (2);

and a lower barb open hole (N) facing the inside of the 3D bulging 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 preparing a fibrous material according to claim 11, further comprising: an outer barb open hole is formed in the concave area (F) through the matching of the third roller (3) and the fourth roller (4).

13. A hygiene article comprising the fibrous material of any of claims 1 to 8.

14. A sanitary article according to claim 13, wherein said sanitary article is selected from the group consisting of diapers for babies, adult diapers, pant diapers for babies, pant diapers for adults, incontinence pads, care towels, sanitary napkins, panty liners, puerperal napkins, breast pads, absorbent pads, dry or wiping towels, menstrual pants, absorbent articles for pets and the like.

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