CN218521411U - Nonwoven fabric capable of being dispersed - Google Patents

Abstract

The embodiment of the application provides a non-woven fabrics can break up, arrange the linear bellying that forms by a plurality of archs including basic unit and a plurality of setting in the basic unit, linear bellying be the wave, and the interval between the adjacent arch is along the regular change of the extending direction of linear bellying for the base member is broken up easily, adopts this kind of arrangement mode simultaneously, makes the base member surface form unsmooth effect, increases the frictional force of wiping, can adapt to different needs, and can not appear falling the whitewashed phenomenon.

Description

Nonwoven fabric capable of being dispersed

Technical Field

The utility model relates to a non-woven fabrics, specificly relate to a can break up non-woven fabrics.

Background

With the rapid development of economy, people increasingly pursue quality of life, in recent years, non-woven fabric products (face washing towels, makeup removing towels, cotton soft towels and the like) become indispensable parts in daily life, and meanwhile, the non-woven fabric products are rapidly integrated into every corner of daily life by virtue of the characteristics of simplicity and convenience in use, disposability and the like, so that various convenience is provided for the life of people, and meanwhile, some environmental problems are brought, so that the development of flushable non-woven fabrics is needed to reduce environmental pressure.

Through research, it has been found that flushability can be increased by providing micro-protrusions on the surface of the substrate, because when the micro-protrusions are provided on the surface, on one hand, the wetting area and the wetting speed can be increased, and on the other hand, when the micro-protrusions are in water flow, the micro-protrusions can increase the water flow resistance so as to facilitate the flushability of the nonwoven fabric under the action of the water flow, and in order to further increase flushability, the document No. CN109537168A, entitled: the non-woven fabrics and wet tissue literature further discloses a mode of carrying out texturing treatment on the micro-protrusions, and the texturing is formed on the micro-protrusions, so that water flow can further generate a pulling acting force on the fluff of the texturing structure, and the fluff falls off from the micro-protrusions, so as to further accelerate the scattering of the base body.

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a flushable nonwoven fabric having good flushability and a wide applicability to solve the above-mentioned problems.

The utility model provides a but break away non-woven fabrics, includes the basic unit and a plurality of setting arrange the linear bellying that forms by a plurality of archs on the basic unit, linear bellying be the wave, and the interval between the adjacent arch is along the change of the extending direction regularity of linear bellying.

Further, the matrix comprises natural fibers and regenerated fibers, and the natural fibers and the regenerated fibers are interlaced and entangled with each other to form the sheet-like material.

Further, the linear protrusions are the same.

Further, the linear convex part is a wave-shaped curve, and a fitting equation of the wave-shaped curve is as follows: f (x) = k sin (a x + b) + n, k, a is a constant greater than 0, b, n is a constant, and x is the distance of a point on the wave curve from the edge of the substrate in a predetermined direction.

Furthermore, the wave-shaped curve comprises a wave peak section, a wave trough section and a connecting section, wherein the distance between the adjacent bulges is smaller than the distance between the adjacent bulges of the connecting section in the wave peak section and the wave trough section.

Furthermore, the wave-shaped curve comprises a plurality of same first curve sections, the first curve sections are curves in a period, each first curve section comprises a starting point, a top point, a first connecting point, a second connecting point, a bottom point, a third connecting point and a terminal point, the extending directions of the wave-shaped curves of the first curve sections are sequentially arranged, the peak sections are curves between the starting points and the first connecting points, the valley sections are curves between the second connecting points and the third connecting points, and the connecting sections are curves between the first connecting points and the second connecting points as well as curves between the third connecting points and the terminal points.

Further, in the first curve segment, the distance between the adjacent protrusions in the area from the starting point to the vertex is gradually reduced, the distance between the adjacent protrusions in the area from the vertex to the first connection point is gradually increased, the distance between the protrusions in the area from the second connection point to the bottom point is gradually reduced, and the distance between the adjacent protrusions in the area from the bottom point to the third connection point is gradually increased.

Furthermore, the bulges are approximately spherical, the diameter of each bulge is 0.5-4.0mm, and the height of each bulge is 0.5-3mm.

Furthermore, the distance between the adjacent bulges is 0.5-8mm.

Furthermore, the distance between the adjacent protrusions of the wave crest section and the wave trough section in each first curve is equal, and the distance between the adjacent protrusions of the connecting section in each first curve is equal.

Has the advantages that: the embodiment of the application provides a non-woven fabrics can break up, arrange the linear bellying that forms by a plurality of archs including basic unit and a plurality of setting in the basic unit, linear bellying be the wave, and the interval between the adjacent arch is the regular change of extending direction of linear bellying along the line for the base member is broken up easily, adopts this kind of arrangement mode simultaneously, makes the base member surface form unsmooth effect, increases the frictional force of cleaning, can adapt to different needs, and can not appear falling the powder phenomenon.

Drawings

FIG. 1 is a front view of a flushable nonwoven fabric according to an embodiment of the present invention;

FIG. 2 is a schematic view of a linear protrusion of FIG. 1;

FIG. 3 is a schematic cross-sectional view of a flushable nonwoven fabric;

a base body 10; a first surface 101; a second surface 102; a linear protrusion 11; a protrusion 110; a start point 1101; vertex 1102; a first connection point 1103; a second connection point 1104; a bottom point 1105; a third connection point 1106; an endpoint 1107; a peak region 111; a valley section 112; connecting sections 113,114.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the nonwoven fabric includes a substrate 10.

Generally, the matrix 10 includes natural fibers and regenerated fibers that are interlaced and entangled with each other to form a sheet-like material. Wherein the natural fiber can be at least one of wood pulp fiber, bamboo fiber, straw pulp fiber, sugar cane pulp fiber and cotton pulp fiber. Preferably, the length of the natural fiber is 10mm or less in one embodiment, and a fiber having good dispersibility in water, that is, a water-dispersible fiber is preferably used. The dispersibility to water here means a property capable of separating fibers from each other when contacted with a large amount of water. The fiber length means an average fiber length.

Among natural fibers, wood pulp fibers have better water dispersibility. On the one hand, when the nonwoven fabric containing the wood pulp fibers is contacted with a large amount of water, the wood pulp fibers are easily detached from the nonwoven fabric due to swelling of the wood pulp fibers, so that the matrix 10 becomes easily hydrolyzed, thereby improving dispersibility of the nonwoven fabric. On the other hand, in the matrix 10, the wood pulp fibers also provide the matrix 10 with strength and the basis of the matrix 10, and if the fiber length is too short, the matrix 10 may have insufficient strength, while if it is too long, it may be difficult to disperse. Preferably, the natural fiber is a wood pulp fiber having a fiber length of 1.5 to 6.5mm, and further, since the softwood pulp fiber has better water dispersibility and a longer length, the wood pulp fiber is preferably a softwood pulp fiber.

The regenerated fibers are entangled with the natural fibers, and the matrix 10 is more easily dispersed when the fibers are thin. Preferably, the regenerated fibers have a fiber denier of preferably less than 12 denier, more preferably less than 7 denier, and further have an aspect ratio of 400 to 14000, where the aspect ratio is equal to (fiber length ÷ denier) x 1000, in other embodiments the mass ratio of natural fiber to regenerated fiber is from 1 to 2, preferably from 7 to 1.

Further, the regenerated fibers include a first regenerated fiber and a second regenerated fiber to allow the matrix 10 to satisfy both strength and water dispersibility requirements. In general, the first regenerated fiber and the second regenerated fiber may be two types of fibers having different fiber lengths or two types of fibers having different shapes, respectively. The relatively longer fibers enable the matrix 10 to have a higher strength, while the relatively shorter fibers are more easily dispersed, and in addition, the fibers having different shapes also have different strengths and water dispersibility, and when the first regenerated fiber is two types of fibers having different lengths from the second regenerated fiber, the first regenerated fiber may have a length of 3 to 12mm. The second regenerated fibre length may be 6-20mm.

Preferably, the regenerated fibers are viscose fibers, and when the regenerated fibers are viscose fibers, the viscose fibers are at least one of flat viscose fibers and round viscose fibers.

The flat viscose fibers can be obtained by wet spinning after dissolving natural fibers in a corresponding solvent. Flat viscose fibres have a lower bending stiffness and are more prone to entanglement than round viscose fibres. Generally, the fibers in the matrix 10 can be entangled by their own physical properties, and the entanglement is a friction cohesion effect. It will be appreciated that flat viscose fibres are more easily dispersed in water than round viscose fibres, since they can be entangled with less force than round viscose fibres. If the flat viscose fibers are contained excessively in the base 10, dispersion is likely to occur in the solution after a long-term immersion, resulting in poor applicability of the nonwoven fabric. Therefore, the viscose fibers contain both flat viscose fibers and round viscose fibers, preferably, the first regenerated fibers are flat viscose fibers, the second regenerated fibers are round viscose fibers, and the mass ratio of the first regenerated fibers to the second regenerated fibers is 7.

In addition, the nonwoven fabric may contain other fibers, such as: chemical fibers, synthetic fibers such as polypropylene, polyvinyl alcohol, polyester, and polyacrylonitrile, or synthetic pulp composed of biodegradable synthetic fibers or polyethylene. In addition, fibril rayon may be added, which is a fiber finely fibrillated on the surface of regenerated cellulose fiber, that is, a fibril rayon having some fine fibers with a thickness of a submicron order peeled off from the surface of the above fiber. In addition, as fibers suitable for addition, biodegradable fibers that can decompose the nonwoven fabric even when discarded in the natural world are preferred. When other fibers are contained, the mass of the other fibers in the matrix 10 should be 10% or less, and more preferably 7% or less.

The substrate 10 includes a first surface 101 and a second surface 102 opposite to each other in a thickness direction, wherein the first surface 101 is provided with a plurality of linear protrusions 11, the linear protrusions 11 are formed by arranging a plurality of protrusions 110 adjacent to each other and have a wave-shaped curve, and it is understood that the linear protrusions 11 may be disposed on the second surface 102 or on both the first surface 101 and the second surface 102.

It will be appreciated that when the linear protrusion 11 is disposed on the first surface 101, the protrusion 110 protrudes from the first surface 101 in a direction away from the first surface 101, and similarly, when the linear protrusion 11 is disposed on the second surface 102, the protrusion 110 protrudes from the second surface 102 in a direction away from the second surface 102.

It is understood that the protrusion 110 has a substantially spherical shape, and the projection of the protrusion 110 on the surface of the substrate 10 has a substantially circular shape, specifically, the diameter of the protrusion 110 is 0.5-4.0mm, and more preferably 1-2.5mm, and it is understood that the diameter of the protrusion 110 refers to the average diameter of the projection of the protrusion 110 on the surface of the substrate 10. The height of the protrusions 110 is 0.5 to 3mm, but the height of the protrusions 110 should be less than 50% of the height of the base 10, and preferably the height of the protrusions 110 is 15 to 40% of the height of the base 10. The height measurement of the protrusion 110 may be performed using a non-contact measurement method in the prior art, or other methods.

Further, the protrusions 110 on each linear protrusion 11 are the same, and the same means that the protrusions 110 have the same shape and size.

Further, the linear protrusions 11 include an extending direction, which is a length direction of a virtual curve fitted between the center points of the protrusions 110, and more particularly, the extending direction is a wavy line.

Further, the plurality of linear protrusions 11 are the same, the same means that the shape and size of the plurality of linear protrusions 11 are the same, specifically, the linear protrusions 11 are wave-shaped curves, and the fitting equation of the wave-shaped curves is as follows: f (x) = k sin (a x + b) + n, k, a is a constant greater than 0, b, n is a constant, x is the distance from a point on the wave curve in a predetermined direction to the edge of the substrate 10, it can be understood that if each wave curve is set to have the same reference point, k, a, b of the parameters in each wave curve fitting equation are the same, and n is in an arithmetic progression.

It can be understood that the wavy curve includes a plurality of identical first curve segments, the first curve segments are curves in a period, specifically, the first curve segments include a starting point 1101, a vertex 1102, a first connection point 1103, a second connection point 1104, a bottom point 1105, a third connection point 1106 and an end point 1107, the plurality of first curve segments are sequentially arranged along a predetermined direction, and the sequence means that the end point 1107 of a previous first curve segment in adjacent first curve segments is connected with the starting point 1101 of a next first curve segment.

It can be understood that, in the present embodiment, the plurality of protrusions 110 form the linear protrusions 11 on the first surface 101 or the second surface 102 in a discontinuous adjacent arrangement, and the distance between adjacent protrusions 110 varies regularly along the extending direction of the linear protrusions 11.

Specifically, in the present embodiment, the wavy curve includes a peak section 111, a valley section 112 and connecting sections (113, 114), wherein in the peak section 111 and the valley section 112, a distance between adjacent protrusions 110 is smaller than a distance between adjacent protrusions 110 of the connecting sections 113,114, more specifically, in the first curve section, the peak section 111 is a curve between the starting point 1101 and the first connecting point 1103, the valley section 112 is a curve between the second connecting point 1104 and the third connecting point 1106, the connecting section 113 is a curve between the first connecting point 1103 and the second connecting point 1104, and the connecting section 114 is a curve between the third connecting point 1106 and the end point 1107, it can be understood that, in each first curve section, a distance between adjacent protrusions 110 also changes regularly and periodically along the extending direction of the protrusions 110.

Further, in the first curve segment, the distance between the adjacent protrusions 110 in the area between the starting point 1101 and the apex 1102 gradually decreases, the distance between the adjacent protrusions 110 in the area between the apex 1102 and the first connection point 1103 gradually increases, the distance between the protrusions 110 in the area between the second connection point 1104 and the bottom point 1105 gradually decreases, and the distance between the adjacent protrusions 110 in the area between the bottom point 1105 and the third connection point 1106 gradually increases.

Further, the pitch between the adjacent protrusions 110 of the peak section 111 and the valley section 112 in each first curve is equal, and the pitch between the adjacent protrusions 110 of the connecting sections 113,114 in each first curve is equal.

Further, the interval between the adjacent protrusions 110 is 0.5 to 8mm.

Further, with reference to the simple description of the manufacture of the non-woven fabric capable of being dispersed in the present application, the non-woven fabric capable of being dispersed may be manufactured by a method in which the fibers forming the substrate 10 are supported by a supporting net, the supporting net is provided with a plurality of grooves, a high-pressure water jet is provided above the supporting net, the high-pressure water jet impacts the fibers and causes the fibers to be alternately inserted and entangled to form the wet substrate 10, and at the same time, the substrate 10 is formed by subsequent drying treatment, and the shape and position of the grooves can be understood to correspond to the shape and position of the protrusions 110.

The properties of the nonwoven fabric obtained by the water jet treatment vary depending on parameters such as the basis weight of the web, the pore diameter of the nozzle, the number of pores of the nozzle, and the passing speed (treatment speed) at the time of treating the web.

In addition, after the fiber web is formed, it is preferable to apply the water jet treatment to the fiber web without drying it, which is simple in terms of process. In addition, once the fiber web is dried, a water jet treatment may also be applied thereto.

The nonwoven fabric is not limited to the water jet treatment, and may be produced by interlacing fibers with needles, air, or the like.

Example 1:

the matrix 10 is formed by using wood pulp and viscose, the ratio of the wood pulp to the viscose is approximately 7, the matrix is formed by hydraulic jet molding, the height of the protrusions 110 is 0.6mm, the basis weight is 90g, the fitting equation f (x) = k × sin (a × x + b) + n is k =1, a =0.12, b =0 in the wavy linear protrusions 11, each n is an arithmetic progression of 1, and the interval between adjacent protrusions 110 in the same linear protrusion 11 is periodically changed from 0.5 to 2mm.

Wherein, the flushability test is carried out by adopting the following method:

(1) Pretreating a sample: according to the method of INDA/EDANA, the sample to be tested is put into 20L of water and stirred for 30 seconds.

(2) Carrying out a washout test: and (3) adding 2L of water (with the water temperature of 22 +/-3 ℃) into the shaking box, starting the shaking box and timing when the shaking frequency reaches 33rpm, and recording the time for sample disintegration, wherein the disintegration is to separate a first small sample from the non-woven fabric body.

The flushability of example 1 was found to be 402s, which is much better than the normally required flushability requirement of 600 s.

In fact, the applicant researches and discovers that by adopting the above arrangement, the protrusions 110 can form a drag resistance to the water flowing through the protrusions 110 when the water flows, so as to form a drag force, that is, fibers in the area of the protrusions 110110 are easily dragged out of the substrate 10, the protrusions 110 enable the water flowing through the surface of the substrate 10 to form a turbulent flow, that is, the water flows form a drag force in each direction on the surface of the substrate 10, so as to easily break up the substrate 10, meanwhile, as the linear protrusions 11 are arranged in a wave shape and the intervals between the protrusions 110 are periodically changed, the water flows easily have a periodic change when the water flows through the surface of the substrate 10, and the protrusions 110 form a periodic "beating" effect, so as to achieve a more obvious flushing effect compared with the prior art, and in addition, by adopting the arrangement, the surface of the substrate 10 forms a concave-convex effect, the friction force of wiping is increased, so as to be capable of adapting to different needs, and the powder falling phenomenon is not generated.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. The non-woven fabric capable of being scattered is characterized by comprising a base layer and a plurality of linear protrusions which are arranged on the base layer and formed by a plurality of protrusions, wherein the linear protrusions are wavy, and the distance between every two adjacent protrusions is changed regularly along the extending direction of the linear protrusions.

2. The flushable nonwoven fabric of claim 1 wherein the matrix comprises natural fibers and regenerated fibers, the natural fibers and the regenerated fibers being entangled with one another to form the sheet material.

3. The flushable nonwoven fabric of claim 1 wherein the plurality of linear projections are identical.

4. The flushable nonwoven fabric of claim 1 wherein the linear protrusions exhibit a wave-like curve, the fitting equation for the wave-like curve being: f (x) = k sin (a x + b) + n, k, a is a constant greater than 0, b, n is a constant, and x is the distance of a point on the wave curve from the edge of the substrate in a predetermined direction.

5. The flushable nonwoven fabric of claim 4 wherein the undulating curve includes a peak portion, a valley portion and a connecting portion, wherein the spacing between adjacent projections in the peak portion and the valley portion is less than the spacing between adjacent projections in the connecting portion.

6. The flushable nonwoven fabric of claim 5, wherein the wavy curve comprises a plurality of identical first curve segments, the first curve segments are curves in a cycle, the first curve segments comprise a starting point, a vertex, a first connecting point, a second connecting point, a bottom point, a third connecting point and an end point, the extending directions of the wavy curves of the first curve segments are sequentially arranged, the peak segment is a curve between the starting point and the first connecting point, the valley segment is a curve between the second connecting point and the third connecting point, and the connecting segments are curves between the first connecting point and the second connecting point and between the third connecting point and the end point.

7. The flushable nonwoven fabric of claim 6 wherein the first curved segment has a gradually decreasing spacing between adjacent projections in the area between the starting point and the apex and a gradually increasing spacing between adjacent projections in the area between the apex and the first connection point, and wherein the spacing between projections in the area between the second connection point and the bottom point gradually decreases and the spacing between adjacent projections in the area between the bottom point and the third connection point gradually increases.

8. The flushable nonwoven fabric of claim 7 wherein the protrusions are substantially spherical, the protrusions having a diameter of 0.5 to 4.0mm and a protrusion height of 0.5 to 3mm.

9. The flushable nonwoven fabric of claim 8 wherein the spacing between adjacent projections is between 0.5 mm and 8mm.

10. The flushable nonwoven fabric of claim 6 wherein the peaks and valleys of each first curve are equally spaced and the lands of the connecting segments of each first curve are equally spaced.

Images