CN111394889A

CN111394889A - Degradable spunlace nonwoven material for nursing and preparation method

Info

Publication number: CN111394889A
Application number: CN201911371320.7A
Authority: CN
Inventors: 朱海翔; 姚正其; 刘维国
Original assignee: HANGZHOU NBOND NONWOVENS CO LTD
Current assignee: HANGZHOU NBOND NONWOVENS CO LTD
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-07-10
Anticipated expiration: 2039-12-26
Also published as: CN111394889B

Abstract

The invention relates to the field of non-woven materials, and discloses a degradable spunlaced non-woven material for nursing and a preparation method thereof, wherein the spunlaced non-woven material is formed by mutually intertwining wood pulp fibers and degradable ultra-short fibers; the surfaces of the wood pulp fiber and the degradable ultra-short fiber are adhered with a dry-state nursing agent; through holes are distributed on the surface of the spunlace nonwoven material; the through holes divide the fibers in the spunlace nonwoven material into longitudinal fiber bundles and transverse fiber bundles which are interwoven longitudinally and transversely; the thickness of the longitudinal fiber bundle is different from that of the transverse fiber bundle, and the fiber bundles with the same thickness and the same direction form a plurality of fiber bundle convex strips which are parallel to each other on the surface of the spunlace nonwoven material. The spunlace nonwoven material is easy to break, can be naturally degraded, is not easy to fluff, and has a good foaming effect.

Description

Degradable spunlace nonwoven material for nursing and preparation method

Technical Field

The invention relates to the field of non-woven materials, in particular to a degradable spunlace non-woven material for nursing and a preparation method thereof.

Background

The existing spunlace nonwoven material is mainly prepared by taking viscose, terylene and other textile fibers as raw materials, mechanically carding to form a net, and carrying out high-pressure jet-flow net-spraying to form cloth. In the process of processing the fiber by adopting the spunlace process, the fiber is not rigidly extruded and damaged, so that the physical and mechanical properties of the fiber are not influenced, and the inherent softness of the fiber web is kept to the maximum extent. Due to the unique advantages of the product, the disposable sanitary product becomes the largest application field of the spunlace nonwoven material, and about 72 percent of spunlace nonwoven materials are used for disposable sanitary products such as wiping towels, facial cleaning towels, cotton soft towels, makeup removing cottons, makeup removing towels, beauty towels, various wet tissues and the like.

Currently, most spunlaced nonwoven materials are the only substrates for disposable hygiene products and the materials themselves are not functional. Some of the cleaning, skin moistening and other care functions required in the use of the sanitary products are mostly realized by means of subsequent off-line or wet processing. In the subsequent wet processing (such as wet tissues, facial masks, makeup removal towels and the like), a certain bacteriostatic agent is usually added to ensure that the product is not deteriorated after being stored for a long time. The traditional wet processing mode has long production flow, complex process, high product cost and inconvenient carrying of finished products due to heavy water content. In recent years, some industry have applied functional chemicals directly to materials during the manufacture of nonwoven materials to provide the nonwoven materials with special functionality as well as the substrate of hygiene articles.

The invention with the application number of 201710629028.5 discloses a shampoo-bath bubble towel and a production process thereof, wherein the shampoo-bath bubble towel comprises a shampoo-bath bubble towel non-woven fabric base material, dry shampoo is uniformly attached to the inner part and the surface of the non-woven fabric base material, and the surface of the non-woven fabric base material is provided with a convex structure formed by a spunlace jacquard or embossing process. The disposable shampoo washing bubble towel with the skin cleaning function is formed by combining the shampoo and the cotton non-woven fabric base material, avoids the problem of bacterial breeding caused by repeated use of the washing towel, has a simple structure, is convenient to carry, and is suitable for being carried and used by tourists and business people. The technical scheme has the defects that the raised spunlace cloth has low friction resistance, is easy to fluff in use and causes fiber shedding; the dry shampoo is not easy to release due to the structure of the non-woven fabric substrate, the foaming amount is low, and the skin cleaning effect is limited; the conventional spunlace fabric base material cannot be dispersed and naturally degraded.

The invention patent with application number 201910589001.7 discloses a makeup removing dry towel, which comprises the following components in parts by weight: 30-50 parts of purified water, 20-30 parts of potassium cocoyl glycinate, 20-30 parts of cocamidopropyl betaine, 20-30 parts of glycerol, 5-10 parts of propylene glycol, 15-20 parts of lotus embryo extract and 5-10 parts of butanediol. The invention neutralizes the raw material components by adopting the cocamidopropyl betaine and the potassium cocoyl glycinate, has good compatibility with various surface active solvents, can effectively release each effective component in the raw materials, does not need to be washed by a large amount of clear water when in use, is convenient to carry, has strong makeup removing capability, can remove the cosmetic residue on the face without repeated friction of a wet tissue, can not cause skin sensitivity in the long-time use process, has strong cleaning and adsorbing effects because the dry tissue contains the black carbon powder fiber membrane cloth, can take away the redundant grease on the face and can better deeply adsorb the facial dirt and the cosmetic residue, and restore the clean and smooth skin. The scheme has the defects that the fiber membrane cloth with a common structure is easy to fluff in use; the length of the common black carbon powder fiber is long, and the material can not be dispersed and naturally degraded.

The invention patent with the application number of 201811528689.X discloses a preparation method of a skin-moistening non-woven fabric, the skin-moistening non-woven fabric and application, the non-woven fabric is formed by flexibly entangling two fibers through a spunlace process, the original characteristics of the fibers are not influenced, and the fibers are not damaged; the spunlace non-woven fabric is used as a substrate, and the pure natural formula essence is further uniformly attached to the substrate in an infiltration manner through a microemulsion atomization process, so that the loss of the formula essence is avoided, and the skin care effect is ensured; meanwhile, the skin-friendly property of the non-woven fabric is not influenced in the infiltration process, the treated non-woven fabric is still soft and comfortable, and the prepared skin-moistening non-woven fabric is uniform in thickness and high in elongation. The defects of the scheme are that the conventional-structure spunlace non-woven fabric is easy to fluff, the conventional fiber is long in length, and the material cannot be dispersed and naturally degraded.

Analysis of prior art products has revealed that currently, functional water-punched nonwoven materials with chemicals added directly to the nonwoven materials have mainly the following problems:

1. the prior functional spunlace nonwoven material mostly takes viscose, terylene and other textile fibers as raw materials, and the manufactured sanitary product cannot be thrown away in a toilet and dispersed and cannot be naturally degraded after being used, so that the environment can be greatly protected by white pollution along with the expansion of the market of disposable sanitary products.

2. At present, the fabric appearance of the functional spunlace nonwoven material is mostly plain weave or concave-convex lines, and because the fiber entanglement fastness in the material is low, fluffing is easy to occur in use, and the fiber is easy to fall off, so that the experience and the feeling of consumers are influenced.

3. The prior functional spunlace nonwoven material has the defects of small foaming amount, low foaming speed and limited cleaning and skin moistening effects due to unreasonable chemical formula, and cannot meet the requirements of consumers on efficient skin care.

Disclosure of Invention

The invention provides a degradable spunlace nonwoven material for nursing and a preparation method thereof, and aims to solve the problems that the existing functional spunlace nonwoven material cannot be dispersed and naturally degraded, has limited nursing function, is easy to fluff and the like.

The specific technical scheme of the invention is as follows: a degradable spunlace nonwoven material for nursing is formed by mutually intertwining wood pulp fibers and degradable ultra-short fibers; dry-state nursing agents are attached to the surfaces of the wood pulp fibers and the degradable ultrashort fibers; and a plurality of through holes are distributed on the surface of the spunlace nonwoven material.

The through holes divide the fibers in the spunlace nonwoven material into a plurality of longitudinal fiber bundles which are parallel to each other and a plurality of transverse fiber bundles which are parallel to each other; the thickness of the longitudinal fiber bundle is different from that of the transverse fiber bundle, and a plurality of fiber bundle convex strips which are parallel to each other are formed on the surface of the spunlace nonwoven material by the high-thickness equidirectional fiber bundles.

The spunlace nonwoven material can solve the problems of incapability of being dispersed, incapability of being naturally degraded, limited nursing function, easiness in fluffing of materials and the like of the existing functional spunlace nonwoven material, and specifically comprises the following steps:

1. for the technical problem that the existing functional water-punched non-woven material is not easy to disperse: the invention particularly selects wood pulp fiber and degradable ultra-short fiber as main raw materials. The wood pulp fiber is extracted from original tree and belongs to plant fiber. The length of the degradable ultrashort fiber is short, and after the degradable ultrashort fiber is mixed with wood pulp fiber, the fibers are low in entanglement and cohesion and easy to disperse in water. The invention adopts the mixture of wood pulp and degradable ultrashort fiber, which not only solves the problem that the common functional spunlace nonwoven material can not be naturally degraded, but also solves the problem that the common functional spunlace nonwoven material can not be dispersed in water due to long fiber length and high entanglement and cohesion.

2. For the technical problem that the nursing function of the existing functional water-thorn non-woven material is limited: according to the invention, the dry-state care agent is attached to the surfaces of the wood pulp fiber and the degradable ultra-short fiber, so that the problems of long flow and high cost in the subsequent wet processing process are solved, and the problem that the conventional spunlace nonwoven material has no functionality is solved.

In addition, the spunlace nonwoven material is a layered flexible material, the surface of the existing plain-woven or uneven-woven functional spunlace nonwoven material has no holes, is equivalent to a 'closed' structure, and is in contact with the skin in a plane or curved surface form in actual use, wherein functional substances on the outer layer fibers are easy to release, and functional substances on the inner layer fibers are difficult to release, so that the functional effect of the material is influenced.

In the invention, the through holes are distributed on the surface of the material, and the longitudinal fiber bundles and the transverse fiber bundles are set to be different in thickness, so that a plurality of fiber bundle convex strips which are parallel to each other in the same direction are formed on the surface of the material. Thus, the material of the present invention is an "open" three-dimensional structure comprising at least three layers of thickness. Compared with the existing spunlace nonwoven material with a common structure, the gradient three-dimensional structure has the following characteristics:

(1) the open material structure increases the contact area between the fibers in the fiber bundle and the outside, and is beneficial to enabling more dry-state care agent to be attached to the fibers in the processing.

(2) In the use of the product, the open material structure is adopted, one side of the material contacting with the skin is a three-dimensional layer with three gradients, and the holes of the three-dimensional structure increase the contact area of the fiber and the skin, thereby being beneficial to the release of functional substances on the fiber.

(3) The structure of the invention can make the concave-convex feeling of the material surface stronger, increase the friction force between the material surface and the cleaned surface, improve the cleaning performance of the material and solve the problem of low cleaning performance of the existing spunlace nonwoven material.

On the other hand, the structure of the invention with the longitudinal and transverse fiber bundles interwoven with each other is most stable when the material is stretched longitudinally or transversely, and has high breaking strength and small breaking elongation.

In conclusion, the functional spunlace nonwoven material with the open structure is not only superior to the common plain structure or the concave-convex structure, but also has better functionality than the common mesh type spunlace nonwoven material, and after the nonwoven material with the special structure is combined with the dry care agent, the nonwoven material and the dry care agent can be matched with each other to obtain unexpected technical effects, rather than the conventional combination or the simple functional superposition.

3. The technical problem that the existing functional spunlace nonwoven material is easy to fluff is as follows: at present, the conventional spunlace material mainly has the cloth cover appearances of plain weave, mesh, concave-convex, jacquard and the like.

The through three-dimensional through holes adopted by the invention are not plain patterns, concave-convex patterns and are different from common plane mesh patterns. The invention adopts the round drum corresponding to the hole pattern penetrating through the through hole, when high-pressure water flow penetrates through the fiber web and meets the convex points on the round drum, the water flow is blocked, the water flow is irregularly reflected upwards and around, and the fibers on the convex points are forced to move around and are mutually aggregated and entangled, so that meshes are formed at the convex point parts. Compared with the cloth surface appearances such as plain weave, concave-convex, jacquard weave and the like, when the cloth surface appearance penetrating through the through hole is adopted, because the fibers around the meshes are mutually aggregated and entangled, the efficiency of mutual entanglement among the fibers is higher, the entanglement fastness of the cloth surface can be improved, the defects of short length and low entanglement rate of wood pulp fibers and ultra-short fibers in the invention are overcome, the requirements of the material on physical indexes in use are met, and the problems of easy fluffing on the material surface and easy shedding of the fibers existing in the existing product are solved.

As mentioned above, in the spunlace process, the open type three-dimensional structure is beneficial to the injection of a plurality of strands of fine high-pressure water flows to the fiber web, the probability of mutual entanglement of fibers in the fiber web is increased, the high-pressure water flows penetrating through the fiber web are rebounded by the supporting net curtain and penetrate through the fiber web again, so that the fibers are displaced, penetrated, entangled and clasped, and the entanglement efficiency of the fibers is effectively improved. The improvement of fiber entanglement efficiency can not only improve the breaking strength of the material, but also improve the wear resistance of the material and improve the surface fuzzing property of the material.

4. Aiming at the technical problem that the existing functional spunlace nonwoven material is not easy to degrade: the wood pulp fiber and the degradable ultra-short fiber selected by the invention can be naturally degraded, and the technical characteristic solves the problem that the common water-punched non-woven material is not degradable.

Preferably, the hole pattern of the through holes is square, and the mesh number is 8-25 meshes.

The hole pattern penetrating through the through hole is square, so that the longitudinal and transverse fiber strips have stronger directionality, lower elongation at break and more stable structure, and the material is not easy to deform in use.

Preferably, the thickness of the longitudinal fiber bundles is greater than the thickness of the transverse fiber bundles.

Preferably, the difference in height between the longitudinal and transverse fiber bundles on the front side of the spunlace nonwoven is greater than the difference in height between the longitudinal and transverse fiber bundles on the back side of the spunlace nonwoven.

Because the fiber raised lines with different thicknesses have differences in the foaming effect and the release of functional substances when the spunlace nonwoven material is used, the fiber raised lines on the front surface and the back surface of the dry spunlace nonwoven material are designed to have different thicknesses, so that a user can select one surface to use according to actual needs, and the use experience of the user can be improved.

Preferably, the length of the degradable ultrashort fiber is 5-20 mm.

The length of the ultra-short fiber is selected to influence not only the physical properties of the material but also the production and processing of the material. In the hydro-entangled reinforcement, the longer the length of the fiber, the more the chance of entanglement and cohesion between the fibers, and the high entanglement fastness. However, in wet-laid materials, too long a fiber length can cause the fibers to flocculate and kink in water, which is not favorable for dispersion of fiber slurry and affects normal production of the materials. After a large amount of researches and experiments for a long time, the ultra-short fiber length is determined to be 5-20 mm, so that the physical property index of the product is improved, the normal production of wet-laid web is ensured, and the beneficial effect is achieved.

Preferably, the degradable ultrashort fibers are one or more of artificial cellulose fibers, biomass primary fibers, biomass regenerated fibers and biomass synthetic fibers.

The man-made cellulose fiber belongs to regenerated fiber, and is fiber obtained by dissolving, spinning and regenerating cellulose and derivatives thereof from plants, and comprises common viscose fiber, high wet modulus and strong viscose fiber, cuprammonium fiber, acetate fiber and the like. Biomass fiber refers to fiber made from organisms or biological extracts, i.e., a type of fiber derived from renewable biomass produced by photosynthesis using the atmosphere, water, land, and the like. According to raw materials and production processes, biomass fibers can be divided into three major categories, namely biomass primary fibers, biomass regenerated fibers and biomass synthetic fibers. The artificial cellulose fiber, the biomass primary fiber, the biomass regenerated fiber and the biomass synthetic fiber adopted in the invention can be naturally degraded, and the technical characteristic solves the problem that the common spunlace nonwoven material is not degradable. In addition, the technical characteristics conform to the national development strategy target, conform to the social development trend and have good economic and social benefits.

Preferably, the wood pulp fibers are virgin wood pulp fibers.

The raw wood pulp is pure raw fiber and is characterized by regular fiber length, sanitation, cleanness and no impurities, is different from the recycled waste paper pulp, and is very suitable for producing disposable sanitary materials.

Preferably, one or more of a surfactant, an emollient, a preservative and a fragrance are included in the dry conditioning agent.

Preferably, the weight of the wood pulp fibers accounts for 30-85% of the total weight of the spunlace nonwoven material; the weight of the degradable ultra-short fiber accounts for 15-70% of the total weight of the spunlace nonwoven material.

Preferably, the surfactant accounts for 20-79% of the total weight of the dry-state care agent; the emollient accounts for 20-79% of the total weight of the dry-state care agent.

More preferably, the surfactant accounts for 40-60% of the total weight of the dry care agent; the emollient accounts for 40-60% of the total weight of the dry care agent.

The surfactant is an organic compound with an amphiphilic structure, at least contains two groups with different polarities and lyophilic properties, can change the interface state of a solution system, and has various effects of wetting, emulsifying, cleaning, foaming and the like on another substance. Whereas emollients are cosmetic ingredients that help maintain the soft, pliable, smooth appearance of skin. The function of emollients is to remain on the skin surface and to lubricate the skin within its stratum corneum. Generally, the skin surface space is filled, lipid lost in the stratum corneum is replaced, the scaly skin is reduced, and the skin appearance is improved. Emollients provide lubrication and protection to the skin surface, making the skin soft, smooth and aesthetically pleasing.

The invention is mainly used for sanitary materials contacting with human bodies, and the surfactant is added to achieve the effects of cleaning, wetting, emulsifying and foaming. The proportion of the surfactant in the formula is high, so that the foaming effect can be improved, and the cleaning efficiency can be enhanced. The emollient is added into the formula of the care agent, so that the skin can be cleaned and simultaneously cared, the appearance of the skin is improved, and the skin is soft and smooth. The team of the invention determines the proper proportion of the surfactant and the emollient through repeated tests and researches.

Preferably, the unit area mass of the degradable spunlace nonwoven material for nursing is 50-120 g/m²。

A preparation method of degradable spunlace nonwoven material for nursing comprises the following steps:

1) sending the wood pulp into a pulp crushing pool for fully crushing to prepare wood pulp mixed liquid.

2) Sending the degradable ultra-short fiber into a discharge tank to finish fiber dispersion to prepare ultra-short fiber slurry, and mixing the ultra-short fiber slurry with wood pulp mixed liquid to prepare fiber mixed slurry; removing impurities and fiber clusters, and uniformly distributing the fibers in the slurry.

3) The fiber mixed slurry is stirred, diluted and then sent into an inclined wire forming machine through a slurry flushing pump, dewatered on a wet forming machine, made into a mixed fiber net and placed on a wet net supporting curtain.

4) Peeling the mixed fiber web from the wet-process web support curtain and transferring the mixed fiber web to a spunlace web support curtain; firstly, pre-needling a mixed fiber web, and then carrying out multi-channel spunlacing on the front surface of the mixed fiber web; then introducing the fiber web into a round drum spunlace mechanism; the surface of the round drum is provided with a plurality of round drum through holes, round drum convex points and strip-shaped concave cavities which are parallel to each other; the fiber net is adsorbed on the surface of the round drum under the action of negative pressure and rotates along with the round drum; high-pressure water jet is carried out on the reverse side of the fiber web by high-pressure spunlace heads which are circumferentially arranged and distributed on the outer side of the circular drum, so that fibers in the mixed fiber web are mutually entangled, the fibers positioned on the surface of the circular drum move and are filled into the strip-shaped concave cavities, and a plurality of fiber bundle convex strips which are mutually parallel are formed on the fiber web; the fibers at the convex points of the drum move, gather and entangle to the periphery, and a plurality of through holes are formed on the fiber net.

5) And removing water from the spunlaced material, and primarily drying the spunlaced nonwoven material through a pre-drying system.

6) Feeding the care agent solution to a care agent application device; meanwhile, the preliminarily dried spunlace nonwoven material passes through a care agent application device, and a care agent solution is applied to the spunlace nonwoven material.

7) And drying and coiling the spunlace nonwoven material to prepare the degradable spunlace nonwoven material for nursing.

Because the structure of the spunlace nonwoven material is special, the spunlace nonwoven material with the special structure cannot be prepared simply according to the existing preparation process. Therefore, the group of the invention purposefully improves the preparation process, and the spunlace nonwoven material with the special structure can be successfully prepared by the process.

Preferably, in the step 1), the concentration of the wood pulp mixed solution is 3-6 wt%.

Preferably, in the step 2), the concentration of the ultra-short fiber slurry is 0.1 to 1 wt%; the concentration of the fiber mixed slurry is 1-3 wt%.

Preferably, in the step 4), the front surface of the mixed fiber web is subjected to multiple spunlacing processes by adopting flat-web spunlacing;

preferably, in the step 4), the pre-pricking pressure is 20-40 bar; the front spunlace pressure is 50-100 bar; and the reverse spunlace pressure is 60-120 bar.

Preferably, in the step 5), a rolling and sucking mechanism is adopted for dehydration, the spunlaced material is partially dehydrated through a rolling dry roller, and then water is extracted through a suction roller, and the water content of the dehydrated material is 60-70%.

At present, two dewatering modes of rolling drying and vacuum suction are mainly adopted in the spunlace production. Compared with a rolling and drying dehydration mode, the vacuum suction dehydration mode can prevent the material from being extruded and deformed, ensure the integrity of the through hole pattern, improve the thickness of the material to the maximum extent, be beneficial to applying a subsequent cleaning agent and ensure that the material has plump hand feeling. However, since the surface of the spunlace nonwoven material is distributed with through holes, the production efficiency is reduced if the spunlace nonwoven material is dewatered by adopting a vacuum suction mode alone.

Therefore, in order to make the material have a three-dimensional effect, the invention combines two modes of rolling and pumping, namely an upper rolling and lower pumping mode; the spunlaced material passes through the middle of the drying roll and the suction roll which are arranged from top to bottom, and drying and suction are synchronously completed, so that the special structure of the spunlaced nonwoven material can be smoothly formed on the spunlaced nonwoven material, the material can meet the performance requirement, and the production efficiency can be greatly improved.

In addition, the water content of the material after the spunlace is high, and if the care agent is directly applied, the phenomenon of 'migration' is generated, so that the care agent is not attached to the fibers, and the product quality is influenced. Thus, in the present invention, the hydroentangled material is first dried by a pre-drying system to bring the material to a pre-dry state prior to entering the applicator device to ensure adequate and uniform application of the treating agent to the hydroentangled material.

Preferably, in step 6), the care agent application device adopts a foam coating mode, and the care agent solution is applied to the spunlace nonwoven material in a foam-like form; the foam viscosity in the foam coating is 1100-1600 cps; the stirring speed in the application process is 170-200 r/min.

The foam has thickening effect, can prevent the permeation of the care agent into the fiber, and does not need to add the thickening agent into the care agent solution; the foam coating is processed with low liquid supply amount, so that the using amount of a care agent can be greatly reduced, the energy consumption is reduced, and the product cost is obviously reduced.

Preferably, in the step 7), a drying cylinder drying mode is adopted, the drying noise pressure is configured to be high in the front and low in the back, and the drying noise pressure is 0.15-0.3 MPa.

In the production process of the spunlace nonwoven material, the drying temperature directly influences the hand feeling of the product. The drying temperature is too high, and the hand feeling of the material is hard. The product of the invention is mainly used for sanitary materials and needs to be soft and plump in hand feeling, so that the drying temperature cannot be too high by controlling the drying pressure in the drying process so as to ensure the performance requirement of the product.

Preferably, the care agent application device comprises: a plurality of foam nozzle pipes, two liquid carrying rollers, a pulp tank and a plurality of cloth guide rollers which are arranged on the frame;

the two liquid-carrying rollers are tangent and rotate reversely, a foam nozzle pipe is arranged above each liquid-carrying roller and is connected with a matched foam generator through a pipeline; the slurry groove is arranged below the two liquid carrying rollers, and the cloth guide roller is arranged at the front end and the rear end of the liquid carrying rollers.

The working process of the nursing agent applying device comprises the following steps: the nursing agent solution and the compressed air pass through a delivery pump, respectively pass through a foam generator in a quantitative and continuous mode according to the mixing proportion required by the process, and are mixed and sheared to enable the nursing agent to form a foam state; the foam of the nursing agent flows out of the foam nozzle pipe through a pipeline to fill the intersection of the roll surfaces of the two liquid-carrying rollers; passing the degradable spunlace nonwoven material through the intersection of the roll surfaces of the two liquid-carrying rolls, penetrating the care agent foam layer, and uniformly coating the care agent foam into the degradable spunlace nonwoven material through the rotation of the liquid-carrying rolls; and drying and coiling to prepare the degradable spunlaced nonwoven material for nursing. The roller type foam applying device has the advantages of simple structure, low investment cost and consistent foam layer thickness.

Preferably, the foam nozzle pipe is controlled by a driving mechanism to reciprocate along the width direction of the spunlace nonwoven material during operation. The design can ensure that the material can uniformly apply the care agent in the width direction.

Preferably, the two liquid-carrying rollers are provided with a distance adjusting device, and the gap between the two liquid-carrying rollers can be adjusted according to needs.

Preferably, a foam recovery system is arranged in the stock chest, and the nursing agent falling in the stock chest is recovered through a pipeline.

Compared with the prior art, the invention has the beneficial effects that:

(1) the wood pulp fiber and the degradable ultrashort fiber adopted by the invention can be naturally degraded, and the sanitary product prepared from the spinning material can be directly dispersed in a sewer after use, so that the problems that the product in the prior art cannot be naturally degraded and cannot be dispersed are solved, and the pressure of environmental protection is relieved.

(2) According to the invention, through arranging the through holes uniformly distributed on the surface of the material and optimizing the formula of the care agent, the cleaning and skin moistening performance of the material is improved, and the problem of low care performance of the product in the prior art is solved. And after the care agent is applied to the spunlace nonwoven material with the structure, the technical effect of facilitating the release of the functional substances on the fibers can be achieved.

(3) The nursing agent is applied to the surface of the fiber in the processing process of the spunlace nonwoven material, so that the nursing agent is fixed in the spunlace material in a dry state, and the problems of long flow, complex processing and high cost of the subsequent wet processing technology are solved.

(4) The invention applies the nursing agent into the material by adopting a foam coating mode, so that the material has good porosity, fluffiness and softness, and simultaneously has the technical effects of saving water, energy and chemicals.

(5) The applying device of the degradable spunlace nonwoven material care agent, which is adopted in the invention, has the advantages of simple structure, reasonable design and convenient operation, and ensures the applying requirement of the care agent in the material production process.

Drawings

FIG. 1 is a schematic perspective view of a degradable spunlace nonwoven material for care according to the present invention;

FIG. 2 is a schematic cross-sectional view of a degradable spunlace nonwoven material for care according to the present invention;

FIG. 3 is a schematic view showing a structure of a care agent application device according to the present invention;

FIG. 4 is a schematic structural diagram of a circular drum in a front view in the manufacturing process of the present invention;

FIG. 5 is a schematic left-side sectional view of a drum in the manufacturing process of the present invention.

The reference signs are: the nursing spunlace nonwoven material 1, the longitudinal fiber bundle 2, the transverse fiber bundle 3, the through holes 4, the foam nozzle pipe 5, the liquid carrying roller 6, the cloth guide roller 7, the pulp groove 8, the nursing agent 9, the circular drum through holes 10, the circular drum convex points 11 and the strip-shaped concave cavities 12.

Detailed Description

The present invention will be further described with reference to the following examples.

General examples

As shown in figure 1, a degradable spunlace nonwoven material 1 for nursing is formed by mutually intertwining wood pulp fibers and degradable ultra-short fibers; dry-state nursing agents are attached to the surfaces of the wood pulp fibers and the degradable ultrashort fibers; and a plurality of through holes 4 are distributed on the surface of the spunlace nonwoven material.

The through holes divide the fibers in the spunlace nonwoven material into a plurality of longitudinal fiber bundles 2 and a plurality of transverse fiber bundles 3 which are parallel to each other; as shown in fig. 2, the thickness of the longitudinal fiber bundle 2 is different from that of the transverse fiber bundle 3, and the high-thickness equidirectional fiber bundle forms a plurality of fiber bundle convex strips which are parallel to each other on the surface of the spunlace nonwoven material.

Preferably, the hole pattern of the through holes is square, and the mesh number is 8-25 meshes. The length of the degradable ultrashort fiber is 5-20 mm.

Preferably, the degradable ultrashort fibers are one or more of artificial cellulose fibers, biomass primary fibers, biomass regenerated fibers and biomass synthetic fibers. The wood pulp fibers are virgin wood pulp fibers.

Preferably, the surfactant accounts for 20-79% of the total weight of the dry-state care agent; the emollient accounts for 20-79% of the total weight of the dry-state care agent. Further preferably, the surfactant accounts for 40-60% of the total weight of the dry care agent; the emollient accounts for 40-60% of the total weight of the dry care agent.

1) and sending the wood pulp into a pulp crushing pool for fully crushing to prepare wood pulp mixed liquid with the concentration of 3-6 wt%.

2) Sending the degradable ultra-short fibers into a discharge tank to finish fiber dispersion, preparing ultra-short fiber slurry with the concentration of 0.1-1 wt%, and mixing the ultra-short fiber slurry with wood pulp mixed liquid to prepare fiber mixed slurry with the concentration of 1-3 wt%; removing impurities and fiber clusters, and uniformly distributing the fibers in the slurry.

4) Peeling the mixed fiber web from the wet-process web support curtain and transferring the mixed fiber web to a spunlace web support curtain; firstly, pre-needling a mixed fiber net, wherein the pre-needling pressure is 20-40 bar; then carrying out multiple spunlacing on the front surface of the mixed fiber web; the front spunlace pressure is 50-100 bar; then introducing the fiber web into a round drum spunlace mechanism;

as shown in fig. 4 and 5, the surface of the drum is provided with a plurality of drum through holes 10, drum convex points 11 and strip-shaped cavities 12 which are parallel to each other; the strip-shaped concave cavities 12 are distributed in parallel, and the round drum protruding points 11 and the round drum through holes are arranged between every two adjacent strip-shaped concave cavities at intervals. The fiber net is adsorbed on the surface of the round drum under the action of negative pressure and rotates along with the round drum; high-pressure water jet jetting is carried out on the reverse side of the fiber web by high-pressure spunlace heads which are circumferentially arranged and distributed on the outer side of the circular drum, and the spunlace pressure on the reverse side is 60-120 bar; fibers in the mixed fiber web are mutually entangled, the fibers on the surface of the round drum are filled into the strip-shaped concave cavities in a moving way, and a plurality of fiber bundle convex strips which are mutually parallel are formed on the fiber web; the fibers at the convex points of the drum move, gather and entangle to the periphery, and a plurality of through holes are formed on the fiber net.

5) And removing water from the spunlaced material by using a rolling and absorbing mechanism, partially dehydrating the spunlaced material by using a rolling and drying roller, extracting the water by using a suction roller, and primarily drying the spunlaced nonwoven material by using a pre-drying system, wherein the water content of the dehydrated material is 60-70%.

6) Feeding the care agent solution to a care agent application device; simultaneously, the preliminarily dried spunlace nonwoven material passes through a care agent application device, and a care agent solution is applied to the spunlace nonwoven material in a foam-like form; the foam viscosity in the foam coating is 1100-1600 cps; the stirring speed in the application process is 170-200 r/min.

7) Drying the spunlaced nonwoven material by adopting a drying cylinder mode, and configuring the drying noise pressure with high front and low back, wherein the drying noise pressure is 0.15-0.3 MPa; and (4) rolling to prepare the degradable spunlace nonwoven material for nursing.

As shown in fig. 3, the care agent applying apparatus includes: a plurality of foam nozzle pipes 5, two liquid carrying rollers 6, a pulp tank 8 and a plurality of cloth guide rollers 7 which are arranged on the frame.

The two liquid carrying rollers 6 are tangent and rotate reversely, and the two liquid carrying rollers 6 are provided with a distance adjusting device. A foam nozzle pipe 6 is arranged above each liquid carrying roller 6, and the foam nozzle pipe 6 is connected with a matched foam generator through a pipeline; the foam nozzle pipe 6 is controlled by a driving mechanism to reciprocate along the width direction of the spunlace nonwoven material during working. The stock chest 8 is arranged below the two liquid carrying rollers 6, and a foam recovery system is arranged in the stock chest 8. The cloth guide roller 7 is arranged at the front end and the rear end of the liquid carrying roller 6.

The working process of the nursing agent applying device is as follows: the nursing agent 9 and the compressed air pass through a delivery pump, respectively pass through a foam generator in a quantitative and continuous mode according to the mixing proportion required by the process, and are mixed and sheared to form a foam state; the foam of the nursing agent flows out of the foam nozzle pipe 5 through a pipeline to fill the intersection of the roll surfaces of the two liquid-carrying rolls 4; passing the degradable spunlace nonwoven material through the intersection of the roll surfaces of the two liquid-carrying rolls, penetrating the care agent foam layer, and uniformly coating the care agent foam into the degradable spunlace nonwoven material through the rotation of the liquid-carrying rolls 6; and drying and coiling to prepare the degradable spunlaced nonwoven material 1 for nursing.

Example 1

As shown in figures 1-2, a degradable spunlace nonwoven material 1 for nursing use has a mass per unit area of 80g/m²The super-short fiber is formed by mutually intertwining 50 percent of raw wood pulp fiber and 50 percent of viscose super-short fiber; the length of the viscose ultrashort fiber is 10 mm. The surfaces of the wood pulp fiber and the viscose ultrashort fiber are adhered with dry-state nursing agents; the surface of the spunlace nonwoven material is distributed with 10-mesh square through holes 4 which penetrate through the front side and the back side. The through holes divide the fibers in the spunlace nonwoven material into a plurality of parallel longitudinal fiber bundles2 and a plurality of transverse fiber bundles 3 which are parallel to each other; the thickness of the longitudinal fiber bundle is larger than that of the transverse fiber bundle, and a plurality of fiber bundle convex strips which are parallel to each other are formed on the surface of the spunlace nonwoven material by the longitudinal fiber bundle with high thickness.

The dry-state nursing agent contains a surfactant, an emollient, a preservative and essence; the weight percentage of the total amount of the surfactant and the dry-state care agent is 48 percent; the weight percentage of the total amount of the emollient and the dry state care agent is 48%.

(1) sending the wood pulp into a pulp crushing pool to fully crush the pulp to prepare a pulp mixed solution with the concentration of 4 percent;

(2) sending the degradable ultra-short fiber into a discharge tank to finish fiber dispersion, preparing ultra-short fiber slurry with the concentration of 0.5 percent, and mixing the ultra-short fiber slurry with pulp mixed liquor to prepare fiber mixed slurry with the concentration of 2 percent; removing impurities and fiber groups to ensure that the fibers are uniformly distributed in the slurry;

4) Peeling the mixed fiber web from the wet-process web support curtain and transferring the mixed fiber web to a spunlace web support curtain; firstly, pre-needling a mixed fiber net, wherein the pre-needling pressure is 30 bar; then carrying out multi-channel spunlacing on the front surface of the mixed fiber web by adopting flat-net spunlacing; the front spunlace pressure is 70 bar; the web is then introduced into a drum hydroentangling mechanism.

As shown in fig. 4-5, the surface of the drum is provided with a plurality of drum through holes, drum convex points and strip-shaped concave cavities which are parallel to each other; the fiber net is adsorbed on the surface of the round drum under the action of negative pressure and rotates along with the round drum; high-pressure water jet jetting is carried out on the reverse side of the fiber web by high-pressure spunlace heads which are circumferentially arranged and distributed on the outer side of the circular drum, and the spunlace pressure on the reverse side is 100 bar; fibers in the mixed fiber web are mutually entangled, the fibers on the surface of the round drum are filled into the strip-shaped concave cavities in a moving way, and a plurality of fiber bundle convex strips which are mutually parallel are formed on the fiber web; the fibers at the convex points of the drum move, gather and entangle to the periphery, and a plurality of through holes are formed on the fiber net.

5) And (3) removing water from the spunlaced material by using a rolling and absorbing mechanism, dehydrating the spunlaced material by using a rolling and drying roller part, pumping the water out by using a suction roller, and primarily drying the spunlaced nonwoven material by using a pre-drying system, wherein the water content of the dehydrated material is 65%.

6) Feeding the treating agent solution to the treating agent applying device (as shown in fig. 3); simultaneously, the preliminarily dried spunlace nonwoven material passes through a care agent application device, and a care agent solution is applied to the spunlace nonwoven material in a foam-like form; the foam viscosity in the foam coating was 1300 cps; the stirring speed during application was 190 r/min.

7) Drying the spunlace nonwoven material by adopting a drying cylinder mode, and configuring the drying noise pressure with high front and low back, wherein the drying noise pressure is 0.25 MPa; and (4) rolling to prepare the degradable spunlace nonwoven material for nursing.

Example 2

Degradable spunlaced nonwoven material for nursing, with mass per unit area of 50g/m²The super-short staple fiber is formed by mutually intertwining 30 percent of raw wood pulp fiber and 70 percent of tencel super-short fiber; the length of the tencel ultra-short fiber is 5 mm. The surfaces of the wood pulp fiber and the tencel ultra-short fiber are adhered with dry-state nursing agents; the surface of the spunlace nonwoven material is distributed with 8-mesh square through holes which penetrate through the front and back of the spunlace nonwoven material. The through holes divide the fibers in the spunlace nonwoven material into a plurality of longitudinal fiber bundles which are parallel to each other and a plurality of transverse fiber bundles which are parallel to each other; the thickness of the longitudinal fiber bundle is larger than that of the transverse fiber bundle, and a plurality of fiber bundle convex strips which are parallel to each other are formed on the surface of the spunlace nonwoven material by the longitudinal fiber bundle with high thickness.

The dry-state nursing agent contains a surfactant, an emollient, a preservative and essence; the weight percentage of the total amount of the surfactant and the dry-state care agent is 20 percent; the weight percentage of the total amount of the emollient and the dry state care agent is 79%.

(1) sending the wood pulp into a pulp crushing pool to fully crush the pulp to prepare a pulp mixed solution with the concentration of 3 percent;

(2) sending the degradable ultra-short fiber into a discharge tank to finish fiber dispersion, preparing ultra-short fiber slurry with the concentration of 0.1 percent, and mixing the ultra-short fiber slurry with pulp mixed liquor to prepare fiber mixed slurry with the concentration of 1 percent; removing impurities and fiber groups to ensure that the fibers are uniformly distributed in the slurry;

4) Peeling the mixed fiber web from the wet-process web support curtain and transferring the mixed fiber web to a spunlace web support curtain; firstly, pre-needling a mixed fiber net, wherein the pre-needling pressure is 20 bar; then carrying out multi-channel spunlacing on the front surface of the mixed fiber web by adopting flat-net spunlacing; the front spunlace pressure is 50 bar; the web is then introduced into a drum hydroentangling mechanism.

The surface of the round drum is provided with a plurality of round drum through holes, round drum convex points and strip-shaped concave cavities which are parallel to each other; the fiber net is adsorbed on the surface of the round drum under the action of negative pressure and rotates along with the round drum; high-pressure water jet jetting is carried out on the reverse side of the fiber web by high-pressure spunlace heads which are circumferentially arranged and distributed on the outer side of the circular drum, and the spunlace pressure on the reverse side is 60 bar; fibers in the mixed fiber web are mutually entangled, the fibers on the surface of the round drum are filled into the strip-shaped concave cavities in a moving way, and a plurality of fiber bundle convex strips which are mutually parallel are formed on the fiber web; the fibers at the convex points of the drum move, gather and entangle to the periphery, and a plurality of through holes are formed on the fiber net.

5) And (3) removing water from the spunlaced material by using a rolling and absorbing mechanism, dehydrating the spunlaced material by using a rolling and drying roller part, pumping the water out by using a suction roller, and primarily drying the spunlaced nonwoven material by using a pre-drying system, wherein the water content of the dehydrated material is 60%.

6) Feeding the treating agent solution to the treating agent applying device (as shown in fig. 3); simultaneously, the preliminarily dried spunlace nonwoven material passes through a care agent application device, and a care agent solution is applied to the spunlace nonwoven material in a foam-like form; the foam viscosity in the foam coating was 1100 cps; the stirring speed during application was 170 r/min.

7) Drying the spunlace nonwoven material by adopting a drying cylinder mode, wherein the drying pressure is high at the front and low at the back, and the drying pressure is 0.15 MPa; and (4) rolling to prepare the degradable spunlace nonwoven material for nursing.

Example 3

Degradable spunlaced nonwoven material for nursing, with unit area mass of 120g/m²The bamboo fiber composite material is formed by intertwining 85% of primary wood pulp fibers and 15% of bamboo pulp ultra-short fibers; the length of the ultra-short fiber of the bamboo pulp is 20 mm. The surfaces of the wood pulp fiber and the bamboo pulp ultra-short fiber are adhered with a dry-state nursing agent; 25-mesh square through holes penetrating through the front and back surfaces of the spunlace nonwoven material are distributed on the surface of the spunlace nonwoven material. The through holes divide the fibers in the spunlace nonwoven material into a plurality of longitudinal fiber bundles which are parallel to each other and a plurality of transverse fiber bundles which are parallel to each other; the thickness of the longitudinal fiber bundle is smaller than that of the transverse fiber bundle, and a plurality of fiber bundle convex strips which are parallel to each other are formed on the surface of the spunlace nonwoven material by the transverse fiber bundle with high thickness.

The dry-state nursing agent contains a surfactant, an emollient, a preservative and essence; the weight percentage of the total amount of the surfactant and the dry-state care agent is 79%; the weight percentage of the total amount of the emollient and the dry state care agent is 20%.

(1) sending the wood pulp into a pulp crushing pool to fully crush the pulp to prepare a pulp mixed solution with the concentration of 6 percent;

(2) sending the degradable ultra-short fiber into a discharge tank to finish fiber dispersion, preparing ultra-short fiber slurry with the concentration of 1%, and mixing the ultra-short fiber slurry with pulp mixed liquor to prepare fiber mixed slurry with the concentration of 3%; removing impurities and fiber groups to ensure that the fibers are uniformly distributed in the slurry;

4) Peeling the mixed fiber web from the wet-process web support curtain and transferring the mixed fiber web to a spunlace web support curtain; firstly, pre-needling the mixed fiber web, wherein the pre-needling pressure is 40 bar; then carrying out multi-channel spunlacing on the front surface of the mixed fiber web by adopting flat-net spunlacing; the front spunlace pressure is 100 bar; the web is then introduced into a drum hydroentangling mechanism.

The surface of the round drum is provided with a plurality of through holes, protruding points and strip-shaped concave cavities which are parallel to each other; the fiber net is adsorbed on the surface of the round drum under the action of negative pressure and rotates along with the round drum; high-pressure water jet jetting is carried out on the reverse side of the fiber web by high-pressure spunlace heads which are circumferentially arranged and distributed on the outer side of the circular drum, and the spunlace pressure on the reverse side is 120 bar; fibers in the mixed fiber web are mutually entangled, the fibers on the surface of the round drum are filled into the strip-shaped concave cavities in a moving way, and a plurality of fiber bundle convex strips which are mutually parallel are formed on the fiber web; the fibers at the convex points of the drum move, gather and entangle to the periphery, and a plurality of through holes are formed on the fiber net.

5) And (3) removing water from the spunlaced material by adopting a rolling and sucking mechanism, dehydrating the spunlaced material by a rolling and drying roller part, pumping the water by a suction roller, and primarily drying the spunlaced nonwoven material by a pre-drying system, wherein the water content of the dehydrated material is 70%.

6) Feeding the treating agent solution to the treating agent applying device (as shown in fig. 3); simultaneously, the preliminarily dried spunlace nonwoven material passes through a care agent application device, and a care agent solution is applied to the spunlace nonwoven material in a foam-like form; the foam viscosity in the foam coating was 1600 cps; the stirring speed during application was 200 r/min.

7) Drying the spunlace nonwoven material by adopting a drying cylinder mode, wherein the drying pressure is high at the front and low at the back, and the drying pressure is 0.3 MPa; and (4) rolling to prepare the degradable spunlace nonwoven material for nursing.

Example 4

This example differs from example 1 in that the difference in height between the longitudinal and transverse fiber bundles on the front side of the spunlace nonwoven is greater than the difference in height between the two on the back side of the spunlace nonwoven.

Because the fiber raised lines with different thicknesses have differences in the foaming effect and the release of functional substances when the spunlace nonwoven material is used, the thicknesses of the fiber raised lines on the front surface and the back surface of the spunlace nonwoven material are designed to be different, and a user can select one surface to use according to actual needs.

Comparative example 1

Degradable spunlaced nonwoven material for nursing, with unit area mass of 80g/m²The super-short fiber is formed by mutually intertwining 50 percent of raw wood pulp fiber and 50 percent of viscose super-short fiber; the length of the viscose ultrashort fiber is 10 mm. The surfaces of the wood pulp fiber and the viscose ultrashort fiber are adhered with dry-state nursing agents; the spunlace nonwoven material is a plain weave structure.

Comparative example 2

Degradable spunlaced nonwoven material for nursing, with unit area mass of 80g/m²The super-short fiber is formed by mutually intertwining 50 percent of raw wood pulp fiber and 50 percent of viscose super-short fiber; the length of the viscose ultrashort fiber is 10 mm. The surfaces of the wood pulp fiber and the viscose ultrashort fiber are adhered with dry-state nursing agents; the spunlace nonwoven material is of a circular concavo-convex structure.

Comparative example 3

Degradable spunlaced nonwoven material for nursing, with unit area mass of 80g/m²The super-short fiber is formed by mutually intertwining 50 percent of raw wood pulp fiber and 50 percent of viscose super-short fiber; the length of the viscose ultrashort fiber is 10 mm. The surfaces of the wood pulp fiber and the viscose ultrashort fiber are adhered with dry-state nursing agents; the spunlace nonwoven material is of a common mesh structure.

Performance test analysis of the materials of example 1 and comparative examples 1-3

1. Material Care Performance test

Evaluation method: the material care performance is closely related to the foaming effect of the material, and therefore, the foaming speed and the foaming amount of the material are used as the care performance evaluation indexes.

The test method comprises the following steps:

(1) taking 20mm by 20mm samples one by one;

(2) 20m L of deionized water was poured into the measuring cylinder, the sample was placed in the measuring cylinder, the sample was immersed in water, the lid was closed,

(3) the measuring cylinder is in an initial state of being vertical, the plug faces upwards, the bottom of the measuring cylinder is supported by one hand, the plug is clamped by the other hand, the measuring cylinder is turned over by 180 degrees up and down, and the plug is turned over for 80 times in each turning of 180 degrees and 2 times back and forth;

(4) recording the turnover frequency when foaming starts, namely the foaming speed; the height of the blisters after 80 inversions was recorded in a graduated cylinder scale, i.e. the amount of blisters.

The evaluation that the smaller the foaming speed (times), the larger the foaming amount (m L) is, the better the care performance of the material is.

2. Flushability test of material

And (4) testing standard: guidance for evaluation of dispersibility of Disposable nonwoven Fabric and products (INDA/EDANA)

And (3) testing items: slosh box test

The evaluation method comprises the following steps: shaking time: 4 minutes, the passing rate of a 12mm screen is more than or equal to 90 percent.

3. Testing of fuzzing Properties of materials

Definition of terms: fluffing refers to the apparent surface change caused by the fluffing formed by the protrusion of fibers or the protrusion of fiber ends on the surface of a material.

And (4) testing standard: determination of pilling performance of textile fabrics in GB T4802.2-2008 part 2 modified martindale method.

Test samples: example 1, comparative example 2, comparative example 3 material samples.

Grinding materials: the sample itself

The number of rubs: 60 times

Pretreatment: without pretreatment

The evaluation method comprises the following steps: observing and comparing the tested sample and the untested sample, and evaluating the fluffing grade; the grade is divided into five grades, and the higher the grade number is, the better the anti-fluffing performance of the material is.

Product contrast test report

The conclusion is that the test report shows that compared with the material of the comparative example 1, the foaming speed of the sample of the example 1 is more than 3 times, and is improved by 42.8 percent, the foaming amount is more than 6m L, and is improved by 66.6 percent, and the fluffing performance is higher than 1 grade, and is improved by 33.3 percent.

Compared with the material of the comparative example 2, the foaming speed of the sample of the example 1 is more than 4 times, the foaming speed is improved by 50 percent, the foaming amount is more than 6m L, the foaming amount is improved by 66.6 percent, and the fluffing performance is higher than 1.5 grade, and the fluffing performance is improved by 60 percent.

Compared with the material of the comparative example 3, the foaming speed of the sample of the example 1 is improved by 33.3 percent by more than 2 times, and the foaming amount is improved by 87.5 percent by more than 7m L, so that the fluffing performance is higher than 1 grade by 33.3 percent.

The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A degradable spunlace non-woven material for nursing is characterized in that: is formed by mutually intertwining wood pulp fibers and degradable ultra-short fibers; dry-state nursing agents are attached to the surfaces of the wood pulp fibers and the degradable ultrashort fibers; a plurality of through holes are distributed on the surface of the spunlace nonwoven material;

the through holes divide the fibers in the spunlace nonwoven material into a plurality of longitudinal fiber bundles which are parallel to each other and a plurality of transverse fiber bundles which are parallel to each other; the thickness of the longitudinal fiber bundle is different from that of the transverse fiber bundle, and a plurality of fiber bundle convex strips which are parallel to each other are formed on the surface of the spunlace nonwoven material by the high-thickness fiber bundle.

2. The degradable spunlaced care nonwoven material of claim 1, wherein:

the hole pattern of the through holes is square, and the mesh number is 8-25 meshes; and/or

The thickness of the longitudinal fiber bundle is larger than that of the transverse fiber bundle, and the height difference between the longitudinal fiber bundle and the transverse fiber bundle on the front surface of the spunlace nonwoven material is larger than that on the back surface of the spunlace nonwoven material.

3. The degradable spunlaced care nonwoven material of claim 1, wherein:

the length of the degradable ultrashort fiber is 5-20 mm; and/or

The degradable ultra-short fiber is one or a combination of more of man-made cellulose fiber, biomass primary fiber, biomass regenerated fiber and biomass synthetic fiber; and/or

The wood pulp fibers are primary wood pulp fibers; and/or

The dry-state care agent comprises one or more of a surfactant, an emollient, a preservative and a perfume.

4. The degradable spunlaced care nonwoven material of claim 1, wherein: the weight of the wood pulp fibers accounts for 30-85% of the total weight of the spunlace nonwoven material; the weight of the degradable ultra-short fiber accounts for 15-70% of the total weight of the spunlace nonwoven material.

5. The degradable spunlaced nonwoven care material of claim 3, wherein the surfactant comprises 20-79% of the total weight of the care agent in a dry state; the emollient accounts for 20-79% of the total weight of the dry-state care agent.

6. The degradable spunlaced nonwoven care material of claim 5, wherein the surfactant comprises 40-60% of the total weight of the care agent in a dry state; the emollient accounts for 40-60% of the total weight of the dry care agent.

7. A method of making degradable spunlaced nonwoven materials for care according to any of claims 1-6, comprising the steps of:

1) sending the wood pulp into a pulping tank for pulping to prepare wood pulp mixed solution;

2) sending the degradable ultra-short fiber into a discharge tank to disperse the fiber to prepare ultra-short fiber slurry, and mixing the ultra-short fiber slurry with wood pulp mixed liquid to prepare fiber mixed slurry; removing impurities and fiber groups to ensure that the fibers are uniformly distributed in the slurry;

3) stirring and diluting the fiber mixed slurry, then sending the fiber mixed slurry into an inclined wire forming machine through a slurry flushing pump, dehydrating the fiber mixed slurry on a wet forming machine to prepare a mixed fiber net, and placing the mixed fiber net on a wet net supporting curtain;

4) peeling the mixed fiber web from the wet-process web support curtain and transferring the mixed fiber web to a spunlace web support curtain; pre-needling the mixed fiber web, and then carrying out spunlacing on the front surface of the mixed fiber web; introducing the mixed fiber web into a round drum spunlace device; the surface of a circular drum of the circular drum spunlace device is provided with a plurality of circular drum through holes, circular drum convex points and strip-shaped concave cavities which are parallel to each other; the mixed fiber net is adsorbed on the surface of the round drum under the action of negative pressure and synchronously rotates along with the round drum; carrying out spunlace on the reverse side of the mixed fiber web by using a high-pressure spunlace head arranged on the peripheral side surface of the circular drum, so that fibers in the mixed fiber web are mutually entangled, the fibers positioned on the surface of the circular drum are moved and filled into the strip-shaped concave cavities, and a plurality of fiber bundle convex strips which are mutually parallel are formed on the surface of the mixed fiber web; the fibers at the convex points of the circular drum move, gather and entangle to form a plurality of through holes on the mixed fiber net;

5) removing water from the spunlaced material, and primarily drying the spunlaced nonwoven material through a pre-drying system;

6) feeding the care agent solution to a care agent application device; simultaneously, the preliminarily dried spunlace nonwoven material passes through a care agent application device, and a care agent solution is applied to the spunlace nonwoven material;

8. The method of claim 7, wherein:

in the step 1), the concentration of the wood pulp mixed solution is 3-6 wt%; and/or

In the step 2), the concentration of the ultra-short fiber slurry is 0.1-1 wt%; the concentration of the fiber mixed slurry is 1-3 wt%; and/or

In the step 4), the pre-pricking pressure is 20-40 bar; the front spunlace pressure is 50-100 bar; the reverse spunlace pressure is 60-120 bar; and/or

In the step 4), carrying out multi-channel spunlacing on the front surface of the mixed fiber web by adopting flat-web spunlacing; and/or

In the step 5), a rolling and sucking mechanism is adopted for dehydration, the spunlaced material is partially dehydrated through a rolling dry roller, water is pumped out through a suction roller, and the water content of the dehydrated material is 60-70%; and/or

In the step 6), a care agent application device adopts a foam coating mode, and a care agent solution is applied to the spunlace nonwoven material in a foam-like mode; the foam viscosity in the foam coating is 1100-1600 cps; the stirring speed in the application process is 170-200 r/min; and/or

And 7) adopting a drying cylinder drying mode, configuring the drying noise pressure with high front and low back, wherein the drying noise pressure is 0.15-0.3 MPa.

9. The method of claim 7, wherein: the care agent application device includes: a plurality of foam nozzle pipes, two liquid carrying rollers, a pulp tank and a plurality of cloth guide rollers which are arranged on the frame;

10. The method of claim 9, wherein:

the foam nozzle pipe is controlled by the driving mechanism to reciprocate along the width direction of the spunlace nonwoven material when in work; and/or

The two liquid carrying rollers are provided with a distance adjusting device; and/or

And a foam recovery system is arranged in the stock chest.