CN114654818A

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

Info

Publication number: CN114654818A
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: 2022-06-24
Anticipated expiration: 2042-02-14
Also published as: CN114654818B

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

Fiber material, preparation method and device and sanitary product

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 art, the single-layer embossed perforated fiber product has a concavo-convex bulge shape and a certain three-dimensional effect, but the single-layer embossed perforated fiber product has the following defects and unsolved problems (as shown in fig. 1):

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

B. especially, when the diaper or sanitary towel is made of the material, the three-dimensional effect is greatly reduced due to the process stretching of the manufacturing process and the use of glue for adhering the diaper or sanitary towel on other materials;

C. the air permeability and the dryness are also influenced;

D. the aesthetics may also be compromised.

Another two-ply composite fiber product is now on the market: the surface layer is made into a 3D hollow solid, and the bottom layer is supported by thermal bonding; the fiber product has an improvement in the problems of taste and color, etc. over the above-mentioned two-layer product, but the above-mentioned heat-sealed hollow three-dimensional two-layer product still has the following drawbacks and unsolved problems (as shown in FIG. 2):

A. in a winding link in the manufacturing process, the 3D hollow solid is flat due to lack of support, and the shape of the hollow solid is irregular and irregular due to distortion and twisting;

B. when the material is used for manufacturing products such as diaper sanitary towels and the like, the 3D stereoscopic effect and the softness can be further reduced by technical stretching;

C. the reduction of the three-dimensional effect can affect the permeability, the use comfort of customers, the three-dimensional effect and the beauty.

There is also a three-layer composite fiber product: the surface layer is made into 3D bulges, the filling layer is filled in the whole bulge cavity of the 3D bulges, and the bottom layer material is used as an adhesive support. However, the above-mentioned heat-sealed hollow three-dimensional double layer still has the following drawbacks and unsolved problems (as shown in fig. 3):

A. in the rolling, because the existence of filling layer, it is comparatively strong to the support of swell, leads to the swell third dimension obviously harder, and the bump contact sense is stronger.

B. The drum pack also has a perforated feature, but due to the presence of the filling layer, the liquid infiltration is blocked, and the aeration effect and the gas circulation have an influence.

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

Disclosure of Invention

The technical problems to be actually solved by the present invention are: the bulges on the conventional double-layer fiber fabric have poor deformation resistance and structure is not easy to maintain, and the filler in the bulges in the three-layer composite material causes the problems of poor permeability/air permeability. The invention provides a composite fiber material, which can effectively solve the problems of poor three-dimensional retentivity, poor deformation resistance, poor comfort, poor elasticity and the like in the existing single-layer or double-layer technology in the using process.

A fibrous material comprising:

a surface layer and a bottom layer;

the partial area on the surface layer is raised to form a 3D bulging area, and a bulging cavity L is formed inside the 3D bulging area E;

the upper barb open pore is formed by extending the surface layer of the 3D bulge area to the interior of the bulge;

the lower barb open pore is formed by extending the bottom layer below the 3D bulge area to the interior of the bulge.

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

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

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

the ratio of the horizontal sectional area of the lower barb open pore at one end of the bottom layer to the horizontal sectional area at 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-10 mm.

When going up barb trompil and/or barb trompil down and not displace the certain distance towards the inside displacement certain distance of 3D swell region, the lateral part of going up barb trompil and barb trompil down can contact each other.

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

Further comprising: an outer barb opening, a non-3D bulge region on the fibrous material, formed by a skin layer and a bottom layer.

The direction of the outer barb open pore is the direction back to the surface layer.

A device for preparing a fibrous material, comprising:

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

the first roller is provided with a convex part, and the convex 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 compounding or bonding part is also arranged for compounding the surface layer and the bottom layer;

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

Still include the fourth roller, be equipped with on the third roller with the third needle body matched with second shrinkage pool on the fourth roller for outside barb trompil is seted up to the outside in the 3D swell region that first roller and second roller suppression formed.

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

forming a 3D bulging region and a recessed region on the surface layer by the cooperation of the first roller and the second roller; and forming an upper barb open pore on the 3D bulge area through the matching of the first concave hole and the first needle body while forming the 3D bulge area;

compounding the side, back to the 3D bulging area, of the surface layer with the bottom layer I through the cooperation of the second roller and the third roller 3;

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

Further comprising: and an external barb open hole is formed in the sunken area F through the matching of the third roller and the fourth roller.

A sanitary product, which comprises the fiber material.

One or more of the components of the sanitary product, such as the surface layer, the diversion layer, the absorption core body, the waistline, the outer layer, the three-dimensional protection and the waist patch, contain the composite fiber material.

The sanitary article includes baby diaper, adult diaper, baby pant diaper, adult diaper, incontinence pad, nursing towel, sanitary pad, puerperal towel, breast pad, liquid absorption pad, dry towel or wiping towel, menstrual period trousers, absorbent article for pet, etc.

Advantageous effects

1. The double-layer composite fiber material is filled in a supporting manner, so that the three-dimensional retention property is good, the resilience is good, and the comfort and the attractiveness are good. The formed hole barbs can also freely exert elastic force and deformation resistance when the non-woven fabric is stressed; the 3D convex parts and the 3D concave parts are alternately arranged, and the contact area is effectively reduced by adding the holes, so that the air circulation and the air permeability are increased;

2. the fiber material is used as a surface layer or a diaper made by diversion, a sanitary towel or other disposable absorption articles, has good three-dimensional retentivity, good resilience and deformation resistance, good comfort and aesthetic property, and the 3D bulges, the openings and the concave parts are matched to act, so that the contact area between the fiber product and the body is reduced, the air permeability is improved, the absorption is improved, the dryness and the smoothness are improved, the liquid and the infiltration and the flow of the loose stool are effectively managed, the dryness is kept and the allergy is reduced; can also be used for the waistline and the back layer of disposable absorbent articles such as diapers and the like, and improves the flexibility and the aesthetic property.

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

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 present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a single layer of a concavo-convex prior art fibrous material structure;

FIG. 2 is a schematic view of a double-layer hollow concavo-convex prior art fiber material structure;

FIG. 3 is a schematic structural view of a three-layer solid filled concavo-convex prior art fibrous material;

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

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

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

FIG. 7 is a schematic view of the location of the engagement point of each roller body and the configuration of the material at the engagement point;

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

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

FIG. 10 is a cross-sectional 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-a fourth roll; 5-a composite part;

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

E. a 3D bulge region; F. a recessed region; m, forming holes on the upper barbs; n, opening holes in the lower barbs; q, a bonding part; l, bulging a cavity; K. opening holes on the outer barbs; r, 3D recessed regions;

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

a-meshing Condition between first and second rollers

B-meshing between the second and third rolls

C-meshing Condition between third and fourth rolls

Detailed Description

The present invention will be described in further detail with reference to the following embodiments. It will be understood by those skilled in the art that the following examples are illustrative of the present invention only and should not be taken as limiting the scope of the invention. The specific techniques or conditions are not indicated in the examples, and the techniques or conditions described in the literature in the art are performed in accordance with the instructions. The terms "shape," "engagement," "thickness," "depth," "height," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, of a device or element of the invention are used merely to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must be considered as limiting the invention in the language so described.

The fiber material is formed by compounding and superposing a surface layer material and a bottom layer material, wherein the surface layer material is used for directly contacting with action parts such as skin, so that the directions such as ' upper ', ' surface layer ', upper ' and the like in the specification of the invention mean that the directions are biased to one side of a surface layer fabric without special description; correspondingly, references to "below," "lower," "bottom," "lower," and the like refer to the side of the underlying material that faces the underlying material.

In particular, the "horizontal" direction in the present invention refers specifically 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 area E and a concave area F (the 3D bulge area E and the concave area F are mutually spaced, and the concave area is understood to be formed outside the bulge area); the bonding part for realizing the combination of the two layers of the bottom layer I and the surface layer H is positioned in the depressed area and is represented by a bonding part Q in figure 5; wherein, the surface layer is provided with an upper barb open pore M (the extending direction of the barb is towards the interior of the bulge) which penetrates through the surface layer in the surface area of the 3D bulge area E; wherein, the bottom layer I material has a lower barb open hole N (the extending direction of the barb is towards the inner part of the bulge) in the bulge cavity L below the bulge area of the surface layer H material. When the surface layer material and the bottom layer material are compounded, the concave area of the upper layer material is provided with a bonding part Q for bonding the bottom layer material and the surface layer material and an external barb open hole K penetrating through the bottom layer material and the surface layer material.

When the structure is adopted, the 3D bulge structure can effectively keep the appearance of the bulge structure in the process of manufacturing and rolling the fabric, and when the bulge structure is extruded, the support structure formed by the upper barb open holes and/or the lower barb open holes can effectively support the bulge structure when the bulge structure is deformed under pressure, so that the cavity structure can be kept. Because the barb-shaped opening forms a column-shaped support in the surface layer bulge cavity, the air circulation of the inner cavity of the bulge is kept, and the shape of the bulge is kept. Meanwhile, due to the existence of the barb-shaped punch holes, a permeation channel is provided for liquid permeation, and the residue of liquid on the surface is reduced. Effectively reduce liquid back-seepage and loose stool contacting and adhering to the skin, and reduce skin allergy. The dryness, air permeability, aesthetic property, comfort and experience feeling are enhanced, and the preparation method and the device of the fiber material effectively realize product processing and simplify the process.

Further, the projection shape of the recessed area on the surface layer in the plane direction of the fiber material can be a point shape, a linear shape, a planar shape and a combination thereof; the projection shape of the bonding part of the bottom layer and the surface layer material composite in the plane direction of the fiber material can be point-shaped, linear, planar and the combination thereof.

Further, the number of the 3D bulge areas is several; the projection areas of the 3D convex parts and the adjacent 3D convex parts in the plane direction of the non-woven fabric are the same or different, and the heights of the 3D convex parts and the adjacent 3D convex parts are the same or different; the 3D convex parts on the surface layer are partially connected or completely separated by the concave parts.

Further, surperficial layer 3D swell regional last barb trompil M be single or several, the trompil part has to the inside barb of swell cavity, the length of barb can be different, length less than or equal to the vertical height in the swell cavity. There is a certain distance between the barb and the center of the barb when the hole is opened, the projection area of the barb root is 1-10 times of the projection area of the opening or non-opening of the barb top (when the barb is regarded as a frustum shape, the tip end positioned on the frustum is the barb top, and the other end is the barb root, namely, the sectional area of the barb root is not less than the sectional area of the top).

Furthermore, the open pore on the depressed area of the fiber material surface layer material is single or a plurality, the open pore part is provided with barbs extending upwards or downwards, and the projection area of the barb root is 1-10 times of the projection area of the barb top opening or non-opening.

Further, the bottom material have single or several barb trompil in the unit area of below in regional cavity of top layer 3D swell, the trompil part has the barb to the inside extension of swell cavity, the length of barb can be different, length less than or equal to the inside vertical height of swell cavity. There is certain distance in the center between the barb that exists during the trompil and the barb, and the barb that trompil and trompil formed exists between upper strata material trompil and the cross space that forms the trompil barb and form. The projected area of the barb root is 1-10 times the projected area of the opening or non-opening of the barb tip.

Further, the projection of the surface layer material and the projection of the bottom layer material in the vertical direction can be partially or completely coincided. The vertical direction here means a 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 ratio of the projected area of the 3D bulge to the projected area of the recessed region is 100: 1 and 1: 100 or more; the projection shape of the 3D bulge area on the non-woven fabric plane is a diamond shape, an oval shape, a semi-cylindrical shape or other shapes; the height of the 3D convex part is 0.1mm-10mm, and preferably, the height of the 3D convex part is 0.5mm-5 mm.

Based on the technical conception, in one embodiment, as shown in fig. 5, the upper barb opening M and the lower barb opening N are both in a truncated cone shape and are staggered with each other, and the side walls 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 certain oblique angle, when last barb trompil M and the lateral wall of barb trompil N was laminated each other down, further formed mutual friction or compressed tightly, played inside by last barb trompil M and the further laminating of barb trompil N support down for spatial structure's the effect that keeps is better.

In addition, not just can realize the direct laminating of going up barb trompil M and barb trompil N when making the completion, also can be after 3D swell region E pushes down the certain distance (also can be bottom I upwards produces the certain distance), make the lateral wall of going up barb trompil M and barb trompil N laminate each other again, such manufacturing approach, on the one hand the requirement of machining precision has been simplified, on the other hand, also can realize when the swell produces deformation, the laminating support has also been realized to inside last barb trompil M and lower barb trompil N's lateral wall, the advantage that keeps spatial structure has equally.

In another embodiment, as shown in fig. 9, the side walls of the upper barb opening M and the lower barb opening N are not attached to each other, and even after the surface layer H or the bottom layer I is displaced toward the inner direction of the swelling bag, the attachment of the side walls cannot be achieved, but the support is achieved by the contact between the tip of the upper barb opening M and the bottom layer I, or the support is achieved 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 further provided with a 3D recessed area R, which is similar to the 3D bulge area but opposite in direction, and is formed by recessing below the bottom layer I, and the position of the lower barb opening N is in the 3D recessed area R of the bottom layer I; meanwhile, in the left, middle and right positions in fig. 10, it is shown that the vertical projections of the 3D depressed region R and the 3D bulge region E of the surface layer H are all coincident, partially coincident or non-coincident, respectively.

The invention also provides a method and a device for manufacturing the fiber material, in particular to a device for producing the fiber material, which is shown in fig. 6 and comprises a first roller 1, a second roller 2, a third roller 3 and a fourth roller 4.

The roller body surface of the first roller 1 is provided with a protruding part 11 protruding out of the roller body surface, and a first concave hole 12 is formed in the protruding part 11. The surface of the roller body 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 roller body of the second roller 2. The bottom of concave part 21 is equipped with the first needle body 22 of protrusion bottom surface, first needle body 22 mutually supports when first roller 1 and second roller 2 rotate with first shrinkage pool 12 on the convex part 11 on the first roller 1, through such structure, form the 3D swell when can utilizing the convex part on the first roller to press the partial pressure with the concave part of second roller, and simultaneously, the needle body in the second roller concave part of recycling cooperates with the inside concave part of first roller convex part, form the barb part towards swell inside on the 3D swell, this barb can be with the top layer puncture also can not puncture. When the processing is carried out, the surface layer is fed between a first roller and a second roller, a 3D convex area and a concave area are formed on the surface layer through the meshing between the first roller and the second roller, and the surface layer is pierced from top to bottom on the surface of the 3D convex area of the surface layer through needle bodies in the concave part of the second roller while the 3D convex area on the surface layer is formed so as to form a through barb opening on the 3D convex area of the surface layer; the length of the first pins 22 should be smaller than the depth of the recessed hole 12, and the number of the first pins 22 in one recessed portion 21 may be one or more.

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

The third roller 3 and the second roller 2 are mutually matched, second needle bodies 31 protruding out of the roller surface are arranged on the surface of the roller body of the third roller 3, and the second needle bodies 31 are penetrated into the positions (such as between the adjacent first needle bodies 22) of the non-first needle bodies 22 in the concave areas 21 of the second roller 2 when the second roller 2 and the third roller 3 are meshed with each other. When adopting such cooperation structure, can compound through first roller 1 and the second roller 2 top layer after punching the completion with the bottom, 3D swell is holding in the recessed area 21 of second roller after compounding again to punch on the bottom through the second needle body 31 on third roller 3, form the inside barb structure of orientation 3D swell on the bottom. When processing is carried out, the second roller transmits the fiber material which is processed in the step and is compounded with the surface layer and the bottom layer to continue rotating and transmits the fiber material between the third roller and the second roller; the needle body on the third roller rotates by the cooperation of the second roller and the third roller, and the needle body is penetrated into the area of the bottom layer material product bulge unit. The base material is pierced and formed with barb openings into the bulge.

And a second concave hole 32 is also formed in the surface of the third roller 3. The second recess hole is matched with a third needle body 41 on a boss on the surface of the roller body of the fourth roller 4. Through this structure can realize beating outside barb trompil again in the depressed area of surface fabric. When the processing step is executed, the fiber material processed in the step 3 is attached to the surface of a roller body of the third roller after being punched by the third roller, and the needle body on the boss of the fourth roller is penetrated into the depression area between the combined bulge and the bulge through the mutual matching transmission of the third roller and the fourth roller. Barb openings formed in the recessed area. The 3D bulge is located in the support space area between the bosses of the fourth roller.

The fiber material is applied to a disposable absorption article, and one or more of components of a surface layer, a flow guide layer, an absorption core body, a waistline, an outer layer, a three-dimensional protection, a waist patch and the like of the disposable absorption article contain the composite fiber material; the disposable absorbent article specifically includes a baby diaper, an adult diaper, a baby pant diaper, an adult pant diaper, an incontinence pad, a care towel, a sanitary napkin, a panty liner, a puerperal towel, a breast pad, an absorbent pad, a dry towel or a wipe, a menstrual panty, an absorbent article for pets, and the like.

Example 1

The surface layer of the fiber material adopts 25 g/square meter whitening weak hydrophilic hot-air non-woven fabrics, the bottom layer adopts 20 g/square meter strong hydrophilic whitening hot-air non-woven fabrics, and the double-layer composite fiber material shown in the figures 4 and 5 is manufactured. Go up barb trompil diameter and be about 2.5mm, go up barb length and be about 1.25mm, barb trompil diameter is about 2.5mm down, and barb length is about 1.2mm down. The side barb 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 whitening 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 the figures 4 and 5 is manufactured. Go up barb trompil diameter and be about 2.0mm, go up barb length and be about 1.0mm, barb trompil diameter is about 2.0mm down, and barb length is about 1.0mm down. The side barb 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 the figure 9 is manufactured. The diameter of the upper barb open pore is about 3.0mm, the length of the upper barb is about 1.8mm, the diameter of the lower barb open pore is about 3.0mm, and the length of the lower barb is about 1.8 mm. The side barb 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 barbed opening M is punched out, and the lower barbed opening N is not punched out.

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 needle punch N effectively improves the material's resistance to deformation and deformation recovery.

Comparative example 2

The same materials were used as in example 2, except that: the two-layer composite described in figure 2 was produced.

Absorption speed comparison test: a fiber material obtained in the example 2 was used as a surface layer for testing (comparative example 2 is used for comparison), according to the regulations of the national standard about the test method of the rewet of the diaper, an 80 ml physiological saline disposable injection measuring block is placed on the same KSC standard diaper absorbing material, a non-woven fabric and a three-layer structure fiber product of the invention are placed on the absorbing material, the liquid level descending speed of the physiological saline in the measuring block is observed to represent the absorption speed, and the absorption time (in seconds) is recorded when the liquid level completely disappears; the smaller the number, the faster the absorption rate, and the 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 invention has a faster absorption rate than that of comparative example 2.

And (3) testing the dryness: in the test, a flat area of 100 x 100, a weight of 0.5kg of a press plate and a standard weight of 5kg of the same weight were applied to the press plate, and the fiber material of the present invention according to example 2 and the composite fiber material according to comparative example 2 were respectively pressed and left at room temperature for 48 hours, and then the press plate and the standard weight were removed and left for 24 hours, to compare the change in the dryness in the initial state (before no pressing) and the dryness after pressing rebound. The dryness was evaluated by the rewet amount, and the lower the rewet amount, the better the dryness. The dryness test method comprises the steps of placing the surface layer material for testing on an absorber, pouring 80 ml of normal saline twice, separating the two times for 5 minutes, placing for 1 minute, then placing 10 layers of standard filter paper on the surface layer, pressing 2.5KG pressing blocks, testing the weight change of the filter paper after pressing for one minute, recording the weight change as the rewet amount, wherein the lower the figure is, the lower the rewet amount is, and the better the dryness is.

TABLE 3

From the test results, dryness comparison table 3 shows that the fiber material of the present invention is significantly superior to the fiber material of comparative example 2.

Comparative example 3

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

Absorption speed comparison test: a fiber material obtained in the example 1 was used as a surface layer for testing (comparative example 3 is used for comparison), according to the national standard for the testing method of the rewet of the diaper, an 80 ml physiological saline disposable injection measuring block is placed on the same KSC standard diaper absorbing material, a non-woven fabric and a three-layer structure fiber product of the invention are placed on the absorbing material, the liquid level of the physiological saline in the measuring block is observed to descend to express the absorbing speed, and the absorbing time (in seconds) is recorded when the liquid level completely disappears; the smaller the number, the faster the absorption rate, and the test data are shown in table 4 below:

TABLE 4

As can be seen from Table 4 above, the fibrous material of example 1 according to the invention has a faster absorption rate than that of comparative example 3.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

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.