A dry-wet dual-purpose nonwoven material and a preparation method and application thereof

Abstract

This invention relates to the field of nonwoven materials technology, and discloses a dual-purpose dry and wet nonwoven material, its preparation method, and its application. The nonwoven material comprises a dry rubbing layer, a reinforcing layer, and a wet rubbing layer stacked sequentially; the two side surfaces of the reinforcing layer are fixedly connected to the inner surfaces of the dry rubbing layer and the wet rubbing layer, respectively; the outer surface of the dry rubbing layer is composed of several protrusions and dust-collecting voids recessed between adjacent protrusions; the wet rubbing layer contains a water-absorbing material. The nonwoven material of this invention exhibits high cleaning power in both dry and wet rubbing, and shows minimal deformation during use, thereby improving the wear resistance of the nonwoven material and reducing secondary pollution caused by dust adsorbed in the nonwoven material falling off.

Description

Technical Field

[0001] This invention relates to the field of nonwoven materials technology, and in particular to a dry and wet dual-use nonwoven material, its preparation method and application. Background Technology

[0002] Most existing mop cloths use traditional textiles as the base material, typically made of multiple layers of composite material. Due to their high cost, they are not suitable for disposable use and require washing after each use. Failure to dry them promptly can lead to bacterial growth, significantly reducing their convenience. While non-woven fabric mop cloths are mostly made from coarse denier fibers reinforced by interlocking, overcoming the shortcomings of textiles, they suffer from weaker cleaning power and are prone to deformation during use.

[0003] For example, patent CN108378794A discloses a mop cloth with super dust removal ability, which includes a bottom non-woven fabric and a fiber layer fixed to at least one surface of the bottom non-woven fabric by several heat-fused connecting lines. The fiber layer is formed by multiple parallel polyester ultra-fine filaments or short fiber bundles. This patent utilizes the three-dimensional fluffy surface constructed by the fiber layer to give the mop cloth good dust absorption ability, which can play a good role in dry wiping. However, due to the poor water absorption of the material, it cannot dry water stains quickly when wiping some water stains, greatly reducing the cleaning efficiency. It also has low cleaning power for some stubborn stains that require wet wiping. In addition, the mop cloth of this patent is easy to deform during wiping, which not only makes the mop cloth have poor abrasion resistance, but also makes the dust in the fiber layer easy to fall off during the repeated deformation of the mop cloth, affecting its cleaning power. Summary of the Invention

[0004] To address the technical problems of existing nonwoven mop cloths, such as weak cleaning power and easy deformation during use, this invention provides a dual-purpose dry and wet nonwoven material, its preparation method, and its application. This nonwoven material exhibits high cleaning power in both dry and wet wiping, with minimal deformation during use. It also improves the abrasion resistance of the nonwoven material and reduces the shedding of dust adsorbed within it, thus minimizing secondary pollution.

[0005] The specific technical solution of this invention is as follows:

[0006] In a first aspect, the present invention provides a nonwoven material suitable for both dry and wet use, comprising a dry rubbing layer, a reinforcing layer, and a wet rubbing layer stacked sequentially; the two side surfaces of the reinforcing layer are fixedly connected to the inner surfaces of the dry rubbing layer and the wet rubbing layer, respectively; the outer surface of the dry rubbing layer is composed of a plurality of protrusions and dust-collecting gaps recessed between adjacent protrusions; the wet rubbing layer contains a water-absorbing material; the outer surface of the wet rubbing layer is provided with a plurality of recesses, the positions of which correspond to the protrusions on the outer surface of the dry rubbing layer.

[0007] Existing nonwoven materials have limited functionality, mostly offering only one of the two functions: wet or dry wiping, thus restricting their application scenarios. To address this, this invention incorporates a dry wiping layer and a wet wiping layer on both sides of the nonwoven material. By creating dust-holding gaps in the dry wiping layer, it achieves good dust-holding capacity during dry wiping, helping to reduce secondary pollution caused by dust adsorbed in the dry wiping layer falling off. Furthermore, by incorporating a water-absorbing material in the wet wiping layer, it achieves good water absorption during wet wiping, effectively removing water stains and some stubborn stains. Through these methods, the nonwoven material of this invention can simultaneously meet the needs of both dry and wet wiping, exhibiting high cleaning performance in both applications and broadening the product's application scenarios.

[0008] Typical nonwoven fabrics are flexible fiber aggregates. Most existing multi-layered nonwoven materials used for wet wiping have relatively flat surfaces; even spunlace nonwoven fabrics with an uneven surface on one side have a relatively flat surface on the other. Therefore, conventional spunlace fabrics have low friction with the surface of the object being wiped during the cleaning process, resulting in low cleaning efficiency.

[0009] Unlike existing products, this invention incorporates a reinforcing layer between the dry rubbing layer and the wet rubbing layer, thereby limiting the movement range of the fibers in the wet rubbing layer. Therefore, during material preparation, due to the action of external forces, the formation of protrusions on the outer surface of the dry rubbing layer results in corresponding depressions on the outer surface of the wet rubbing layer.

[0010] The purpose of setting the recesses on the outer surface of the wet wiping layer in this invention is to increase the friction between the wet wiping layer and the surface of the object being wiped, thereby improving wiping efficiency. At the same time, the numerous recesses on the outer surface of the wet wiping layer also provide storage space for solid stains on the object being wiped, which can prevent the solid stains from falling off during cleaning and causing secondary pollution.

[0011] Existing nonwoven fabrics are composed of numerous single fibers, making them relatively soft but prone to deformation during wiping. To address this, the present invention incorporates a reinforcing layer between the dry and wet wiping layers. This not only prevents the nonwoven material from deforming during use but also provides at least three unique benefits:

[0012] Firstly, the reinforcement layer can improve the tensile strength of the material, reduce the elongation at break, reduce the deformation of the nonwoven material during use, and improve the wear resistance of the nonwoven material.

[0013] Secondly, the reinforcement layer can reduce the deformation of the dust-holding pores when the non-woven material is used, which helps to prevent the dust adsorbed in the pores from falling off due to repeated deformation, thereby improving the cleaning power of the non-woven material.

[0014] Thirdly, since the reinforcement layer restricts the displacement range of fibers in the dry and wet rubbing layers, the external force during the preparation process can significantly improve the protrusion effect on the outer surface of the dry rubbing layer and simultaneously form a depression on the outer surface of the wet rubbing layer, thereby effectively improving the cleaning performance of the dry and wet rubbing layers.

[0015] Preferably, the reinforcing layer is a synthetic wire mesh with a quadrilateral mesh shape, and the length of each side of the quadrilateral is 6-11 mm; the transverse tensile strength of the synthetic wire mesh is 40-60 N / 5 cm, the longitudinal tensile strength is 45-70 N / 5 cm, and the fineness of the single filament is 20-30 dtex.

[0016] By designing the mesh shape of the synthetic wire mesh to be quadrilateral and controlling the length of each side within the range of 6 to 11 mm, the reinforcing layer can have high structural strength, and simultaneously enhance the protrusion effect on the outer surface of the dry-rubbing layer and the depression effect on the outer surface of the wet-rubbing layer. At the same time, it is beneficial to form fiber entanglement between the reinforcing layer and the dry-rubbing and wet-rubbing layers, limiting the excessive movement of fibers in the dry-rubbing and wet-rubbing layers, thereby improving the effect of the reinforcing layer in reducing the deformation of nonwoven materials.

[0017] During the production process, the equipment moves the material, which will have a certain stretching effect on the product. By controlling the longitudinal and transverse tensile strength of the synthetic mesh within the above range, it can ensure that the nonwoven material has strong resistance to tensile deformation when used, and also ensure that the nonwoven material will not cause cutting difficulties due to excessive strength during processing.

[0018] As the fineness of the monofilaments in the synthetic mesh increases, the strength of the reinforcing layer also increases, which helps improve the tensile deformation resistance of the nonwoven material during use, thereby improving its abrasion resistance and cleaning power. However, the team of this invention found that when the fineness of the monofilaments in the synthetic mesh is too high, it will cause large protrusions to form at the interlacing points. This can easily damage the surface of the object being wiped during use. Furthermore, synthetic mesh with excessively fine monofilaments is easily exposed on the surface of the nonwoven material, affecting the function of the dry and wet wiping layers and resulting in lower cleaning power of the nonwoven material. Based on this, the present invention controls the fineness of the monofilaments in the synthetic mesh to 20-30 dtex.

[0019] Furthermore, the synthetic mesh is composed of one or more of polypropylene filaments, polyester filaments, and polyamide filaments.

[0020] Preferably, the reinforcing layer is a woven fabric; the warp and weft density of the woven fabric is 12-14 threads / 10cm, the longitudinal breaking strength and transverse breaking strength are 35-45N / 5cm, and the yarn count is 20-30.

[0021] When the warp and weft density of woven fabrics are controlled at 12-14 threads / 10cm, it can not only have high strength, but also avoid the woven fabric structure being too compact, which is not conducive to the formation of entanglement between the fibers and the dry and wet rubbing layers. Therefore, it can give nonwoven materials better tensile deformation resistance.

[0022] This invention, by controlling the yarn count in woven fabrics to 20-30, endows nonwoven materials with better tensile strength and cleaning power. When the yarn count in woven fabrics is low, it affects the structural strength of the fabric, which in turn adversely affects the tensile strength of the nonwoven material, resulting in relatively low abrasion resistance and cleaning power. Conversely, when the yarn count is too high, the yarn is easily exposed on the surface of the nonwoven material, causing a reduction in the cleaning power of both dry and wet rubbing layers.

[0023] Preferably, the dry-rubbing layer contains hot-melt adhesive fibers, and the hot-melt adhesive fibers account for 20-25% of the mass of the dry-rubbing layer.

[0024] By adding a certain amount of hot-melt adhesive fibers to the dry-wiping layer, a more stable bond can be formed between the fibers, thereby making the shape and structure of the dust-holding pores more stable. In scenarios involving vigorous wiping, this reduces the shedding of adsorbed dust caused by repeated deformation of the dust-holding pores. However, when the content of hot-melt adhesive fibers in the dry-wiping layer is too high, it will increase the hardness of the material. The material will become stiff during wiping, which is not conducive to the removal and storage of dust by the dry-wiping layer. At the same time, it will increase the difficulty of production and may cause the side of the product in contact with the drying device to stick to the device during the drying process, which will have an adverse effect on the product performance.

[0025] Furthermore, the hot-melt bonded fiber is a core-sheath composite fiber with a sheath melting point of 110–135°C.

[0026] Preferably, the dry-rubbing layer is composed of coarse fibers with a fineness of 5-8 dtex and fine fibers with a fineness of 2-4 dtex mixed and entangled, wherein the mass ratio of the coarse fibers to the fine fibers is 1:2.0-2.6.

[0027] This invention improves the dust-holding capacity of the dry-wiping layer by mixing two fibers of different fineness (5-8 dtex and 2-4 dtex) in the dry-wiping layer and controlling their ratio.

[0028] Preferably, the dry rubbing layer is a synthetic fiber nonwoven fabric; the wet rubbing layer is a cellulose fiber nonwoven fabric.

[0029] Cellulose fibers have good water absorption, which gives the wet rubbing layer a good wet rubbing effect.

[0030] Furthermore, the synthetic fiber nonwoven fabric is composed of one or more of polyester fibers, polypropylene fibers, and polyamide fibers.

[0031] Preferably, in the nonwoven material, the dry rubbing layer and the reinforcing layer account for 30-65% and 8-47% of the mass, respectively.

[0032] In the nonwoven material of this invention, when the mass percentage of the dry rubbing layer is too low, its dust-holding effect will be affected, thereby affecting the cleaning power during dry rubbing; when the mass percentage of the dry rubbing layer is too high, the fibers used are relatively coarse, which easily leads to poor fiber entanglement, and the fibers are easy to fall off during dry rubbing; when the mass percentage of the reinforcing layer is too low, its reinforcing effect on the nonwoven material will be poor, thereby affecting the wear resistance and cleaning power of the nonwoven material; when the mass percentage of the reinforcing layer is too high, its bonding with the dry rubbing layer and wet rubbing layer will be not tight, which will also affect its reinforcing effect on the nonwoven material.

[0033] Preferably, the ratio of the dry longitudinal to transverse tensile strength of the nonwoven material is 0.7 to 1.4:1.

[0034] For nonwoven materials, by controlling their longitudinal and transverse breaking strength to be relatively balanced, it is possible to avoid a significant difference between transverse and longitudinal deformation.

[0035] Preferably, the protrusions on the outer surface of the dry rubbing layer are circular.

[0036] Preferably, the protrusions on the outer surface of the dry rubbing layer are polygonal in shape.

[0037] Our research team discovered that, during the dry wiping process, polygonal protrusions on the outer surface of the dry wiping layer are more effective at removing dust and have higher cleaning efficiency than circular protrusions.

[0038] Preferably, the basis weight (mass per unit area) of the nonwoven material is 50–150 g / m². 2 .

[0039] When the basis weight of nonwoven materials is less than 50g / m 2 At this stage, its dust holding capacity is low and its cleaning power is weak; when the weight exceeds 150g / m³, its dust holding capacity is low. 2 At times, non-woven materials tend to harden, which can also affect their cleaning power.

[0040] Secondly, the present invention provides a method for preparing the aforementioned dry and wet dual-use nonwoven material, comprising the following steps:

[0041] (1) The dry-friction layer fiber material is made into a dry-friction layer sheet;

[0042] (2) The wet rubbing layer fiber material is made into a wet rubbing layer sheet;

[0043] (3) Stack the reinforcing layer sheet between the dry-rubbed layer sheet and the wet-rubbed layer sheet to form a composite fiber layer;

[0044] (4) The composite fiber layer is fed into the hydroentanglement system to fix the dry rubbing layer sheet, the reinforcing layer sheet and the wet rubbing layer sheet together, and to form several depressions on the outer surface of the wet rubbing layer sheet and several protrusions on the outer surface of the dry rubbing layer sheet to form a reinforced composite fiber layer.

[0045] (5) The reinforced composite fiber layer is dried to produce the dry and wet dual-use nonwoven material.

[0046] As a preferred option, the specific process of step (4) includes the following steps: after the composite fiber layer is pre-wetted, it is first sent into the first hydroentangling device to perform hydroentangling from the outside of the dry rubbing layer sheet, so that the dry rubbing layer, the reinforcing layer and the wet rubbing layer are connected and fixed to each other; then it is sent into the second hydroentangling device to perform hydroentangling from the outside of the wet rubbing layer sheet, and several depressions are formed on the outer surface of the wet rubbing layer sheet, while several protrusions are formed on the outer surface of the dry rubbing layer sheet.

[0047] As a preferred embodiment, in step (4), the method of forming several depressions on the outer surface of the wet rubbing layer sheet and several protrusions on the outer surface of the dry rubbing layer sheet is as follows: in the drum hydroentangling device, the dry rubbing layer sheet in the composite fiber layer is attached to the drum, and the surface of the drum is provided with a template corresponding to the protrusions of the dry rubbing layer, and hydroentangling is performed from the outside of the wet rubbing layer sheet.

[0048] Preferably, in step (5), excess moisture in the reinforced composite fiber layer is removed first, and then dried and rolled to produce the dry and wet dual-use nonwoven material.

[0049] Thirdly, the present invention provides the application of the aforementioned wet and dry nonwoven material in floor mops.

[0050] Compared with the prior art, the present invention has the following advantages:

[0051] (1) The present invention adopts a specific dry rubbing layer, reinforcement layer and wet rubbing layer structure design, which enables the non-woven material to have high cleaning power when dry rubbing and wet rubbing, and makes it less deformed when used, thereby giving it better wear resistance, while reducing the secondary pollution caused by the dust adsorbed in the non-woven material falling off.

[0052] (2) This invention improves the wear resistance and cleaning power of nonwoven materials by ① using a synthetic mesh or woven fabric of a specific specification as a reinforcing layer, ② adding a specific amount of hot melt bonding fiber to the dry rubbing layer, ③ using two different fine fibers of a specific ratio in the dry rubbing layer, and ④ controlling the proportion of each layer. At the same time, the presence of the reinforcing layer can keep the protrusions on the product surface and prevent them from being stretched during production. The hot melt bonding fiber can also keep the protrusions on the product surface upright during production. Attached Figure Description

[0053] Figure 1 These are schematic diagrams of the nonwoven materials in Examples 1-4;

[0054] Figure 2 These are schematic cross-sectional views of the nonwoven materials in Examples 1-4;

[0055] Figure 3 These are schematic diagrams of the reinforcing layer in Examples 1 and 3;

[0056] Figure 4 These are schematic diagrams of the reinforcing layer in Examples 2 and 4;

[0057] Figure 5 A schematic diagram of the area on the surface of the dust collection test instrument where dust particles are applied.

[0058] Figure 6 This is a schematic diagram of the instrument surface when testing the dust absorption capacity of the sample.

[0059] The attached diagram is labeled as follows: 1. Dry wiping layer; 2. Reinforcing layer; 3. Wet wiping layer; 4. Dust-collecting gap; 5. Protrusion; 6. Recess. Detailed Implementation

[0060] The present invention will be further described below with reference to embodiments.

[0061] General Implementation Examples

[0062] A dry and wet dual-use nonwoven material includes a dry rubbing layer 1, a reinforcing layer 2, and a wet rubbing layer 3 stacked sequentially; the two sides of the reinforcing layer 2 are fixedly connected to the inner surfaces of the dry rubbing layer 1 and the wet rubbing layer 3, respectively; the outer surface of the dry rubbing layer 1 is composed of a plurality of protrusions 5 and dust-collecting gaps 4 recessed between adjacent protrusions 5; the wet rubbing layer 3 contains a water-absorbing material; the outer surface of the wet rubbing layer 3 is provided with a plurality of recesses 6, the positions of the recesses 6 corresponding to the protrusions 5 on the outer surface of the dry rubbing layer 1.

[0063] In one specific embodiment, the reinforcing layer 2 is a synthetic wire mesh with a quadrilateral mesh shape, each side of which has a length of 6–11 mm. The synthetic wire mesh has a transverse tensile strength of 40–60 N / 5 cm, a longitudinal tensile strength of 45–70 N / 5 cm, and a single filament fineness of 20–30 dtex. The synthetic wire mesh can be composed of one or more of polypropylene filaments, polyester filaments, and polyamide filaments.

[0064] In another specific embodiment, the reinforcing layer 2 is a woven fabric; the warp and weft density of the woven fabric is 12-14 threads / 10cm, the longitudinal breaking strength and transverse breaking strength are 35-45N / 5cm, and the yarn count is 20-30.

[0065] In one specific embodiment, the dry rubbing layer 1 contains hot-melt adhesive fibers, and the hot-melt adhesive fibers account for 20-25% of the mass of the dry rubbing layer 1. The hot-melt adhesive fibers can be core-sheath type composite fibers with a sheath melting point of 110-135°C.

[0066] In one specific embodiment, the dry rubbing layer 1 is composed of coarse fibers with a fineness of 5-8 dtex and fine fibers with a fineness of 2-4 dtex mixed and entangled together, wherein the mass ratio between the coarse fibers and the fine fibers is 1:2.0-2.6.

[0067] In one specific embodiment, the dry rubbing layer 1 is a synthetic fiber nonwoven fabric; the wet rubbing layer 3 is a cellulose fiber nonwoven fabric. The synthetic fiber nonwoven fabric may be composed of one or more of polyester fibers, polypropylene fibers, and polyamide fibers.

[0068] In one specific embodiment, the dry rubbing layer 1 and the reinforcing layer 2 in the nonwoven material have a mass ratio of 30-65% and 8-47%, respectively.

[0069] In one specific embodiment, the dry longitudinal and transverse tensile strength ratio of the nonwoven material is 0.7–1.4:1, and the basis weight of the nonwoven material is 50–150 g / m². 2 .

[0070] In one specific embodiment, the distribution density of the protrusions 5 on the outer surface of the dry rubbing layer 1 is 1 to 9 per cm. 2 The projection radius on the dry-rubbed layer is 1-4 mm.

[0071] In one specific embodiment, the protrusions 5 on the outer surface of the dry rubbing layer 1 are circular or polygonal in shape.

[0072] A method for preparing the above-mentioned dry and wet dual-use nonwoven material includes the following steps:

[0073] (1) The dry-friction layer fiber material is made into a dry-friction layer sheet;

[0074] (2) The wet rubbing layer fiber material is made into a wet rubbing layer sheet;

[0075] (3) Stack the reinforcing layer sheet between the dry-rubbed layer sheet and the wet-rubbed layer sheet to form a composite fiber layer;

[0076] (4) The composite fiber layer is fed into the hydroentanglement system to fix the dry rubbing layer sheet, the reinforcing layer sheet and the wet rubbing layer sheet together, and to form several depressions on the outer surface of the wet rubbing layer sheet and several protrusions on the outer surface of the dry rubbing layer sheet to form a reinforced composite fiber layer.

[0077] (5) The reinforced composite fiber layer is dried to produce the dry and wet dual-use nonwoven material.

[0078] As one implementation method, the specific process of step (4) includes the following steps: after the composite fiber layer is pre-wetted, it is first sent into the first hydroentangling device to perform hydroentangling from the outside of the dry rubbing layer sheet, so that the dry rubbing layer, the reinforcing layer and the wet rubbing layer are connected and fixed to each other; then it is sent into the second hydroentangling device to perform hydroentangling from the outside of the wet rubbing layer sheet, forming several depressions on the outer surface of the wet rubbing layer sheet, and at the same time forming several protrusions on the outer surface of the dry rubbing layer sheet.

[0079] In one specific implementation, in step (4), the method of forming several depressions on the outer surface of the wet-rubbed layer sheet and several protrusions on the outer surface of the dry-rubbed layer sheet is as follows: In a drum hydroentangling device, the dry-rubbed layer sheet in the composite fiber layer is attached to a drum, the surface of which is provided with a template corresponding to the protrusions of the dry-rubbed layer, and hydroentangling is performed from the outside of the wet-rubbed layer sheet. In another implementation, in step (5), excess moisture in the reinforcing composite fiber layer is first removed, and then dried and rolled to produce the dry-wet dual-use nonwoven material.

[0080] The application of the above-mentioned dry and wet dual-use nonwoven materials in floor mops.

[0081] Example 1

[0082] A nonwoven material suitable for both dry and wet use, with a unit area mass of 65 g / m². 2 The ratio of longitudinal to transverse tensile strength in the dry state is 0.9:1. The structure of this nonwoven material is as follows: Figures 1-3 As shown, the details are as follows:

[0083] The nonwoven material consists of a dry-rubbing layer 1, a reinforcing layer 2, and a wet-rubbing layer 3, which are stacked and connected sequentially. The upper and lower surfaces of the reinforcing layer 2 are fixed to the inner surfaces of the dry-rubbing layer 1 and the wet-rubbing layer 3, respectively. Several protrusions 5 are distributed on the outer surface of the dry-rubbing layer 1, with a distribution density of 1 protrusion / cm². 2The protrusion 5 is hemispherical in shape, and its projected radius on the dry wiping layer 1 is 4mm; the adjacent protrusions 5 form a recessed dust-holding gap 4. The outer surface of the wet wiping layer 3 is provided with several recesses 6; the positions of the recesses 6 correspond to the protrusions 5 on the outer surface of the dry wiping layer 1.

[0084] Dry rubbing layer 1 is a synthetic fiber nonwoven fabric with a unit area mass of 30 g / m². 2 The composition is: 80% polyester fiber (of which 30% is 6.6dtex*32mm and 50% is 2.56dtex*38mm); 20% ES fiber (2.67dtex*38mm), and the skin melting point is 125℃.

[0085] The wet wiping layer 3 is a spunlace nonwoven fabric with a unit area mass of 29 g / m². 2 It is made of 100% viscose fiber with a fiber specification of 1.67dtex*38mm.

[0086] Reinforcing layer 2 is a polypropylene wire mesh with a unit area mass of 6 g / m². 2 The mesh shape is a quadrilateral with each side length of 11mm, the single filament fineness is 20dtex, and the longitudinal and transverse tensile strengths are 45N / 5cm and 40N / 5cm, respectively.

[0087] The nonwoven material in this embodiment is prepared through the following steps:

[0088] (1) 20% ES fiber (2.67dtex*38mm) and 80% polyester fiber (of which 30% is 6.6dtex*32mm and 50% is 2.56dtex*38mm) are mixed and then opened and combed to make dry-rubbed sheet;

[0089] (2) Viscose fiber (1.67dtex*38mm) is opened and combed to form a wet-rubbed sheet;

[0090] (3) Polypropylene wire mesh with quadrilateral openings (6g / m²) 2 After unwinding, the fiber layer is stacked between the dry-rubbed sheet and the wet-rubbed sheet to form a composite fiber layer.

[0091] (4) After the composite fiber layer is pre-wetted, it is first fed into the first hydroentangling device. Two high-pressure hydroentangling heads are used to hydroentangle from the outside of the dry-rubbed layer sheet (the hydroentangling head pressure is 40 kg and 60 kg respectively), so that the dry-rubbed layer sheet, the reinforcing layer sheet, and the wet-rubbed layer sheet are connected and fixed to each other. Then, it is fed into the second hydroentangling device. The side of the dry-rubbed layer sheet is attached to the surface of the drum. Three high-pressure hydroentangling heads are used to hydroentangle from the outside of the wet-rubbed layer sheet (the hydroentangling head pressure is 80 kg, 80 kg, and 90 kg respectively), so that several depressions are formed on the outer surface of the wet-rubbed layer sheet, and several protrusions are formed on the outer surface of the dry-rubbed layer sheet, thus forming a reinforced composite fiber layer. Among them, the first hydroentangling mechanism and the second hydroentangling mechanism are both drum hydroentangling. The drum surface of the second hydroentangling mechanism is provided with a template corresponding to the hemispherical protrusions of the dry-rubbed layer.

[0092] (5) First, remove excess moisture from the reinforced composite fiber layer, then dry and roll the composite fiber layer to produce the dry and wet dual-use nonwoven material of this embodiment.

[0093] Example 2

[0094] A high-efficiency, multi-functional non-woven cleaning cloth with a unit area mass of 150g / m² 2 The ratio of longitudinal to transverse tensile strength in the dry state is 1.2:1. The structure of this nonwoven material is as follows: Figure 1 , Figure 2 and Figure 4 As shown, the details are as follows:

[0095] The nonwoven material consists of a dry-rubbing layer 1, a reinforcing layer 2, and a wet-rubbing layer 3, which are stacked and connected sequentially. The upper and lower surfaces of the reinforcing layer 2 are fixed to the inner surfaces of the dry-rubbing layer 1 and the wet-rubbing layer 3, respectively. Several protrusions 5 are distributed on the outer surface of the dry-rubbing layer 1, with a distribution density of 7 protrusions / cm². 2 The protrusion 5 is polygonal in shape, and its projection on the dry wiping layer 1 is a regular pentagon with a side length of 3mm; the adjacent protrusions 5 form a sunken dust-collecting gap 4.

[0096] Dry rubbing layer 1 is a synthetic fiber nonwoven fabric with a unit area mass of 45 g / m². 2 The composition is: 80% polyester fiber (of which: 30% is 6.6dtex*32mm and 50% is 2.56dtex*38mm); 20% is ES fiber (2.67dtex*38mm), and the skin melting point is 125℃.

[0097] The wet wiping layer 3 is a spunlace nonwoven fabric with a unit area mass of 35 g / m². 2 It is made of 100% viscose fiber with a fiber specification of 1.67dtex*38mm.

[0098] Reinforcing layer 2 is a plain weave fabric with a unit area mass of 70 g / m².2 The warp and weft density are both 14 threads / 10cm, the yarn count is 30, and the longitudinal and transverse breaking strengths are both 45N / 5cm.

[0099] The nonwoven material in this embodiment is prepared through the following steps:

[0100] (1) 20% ES fiber (2.67dtex*38mm) and 80% polyester fiber (of which 30% is 6.6dtex*32mm and 50% is 2.56dtex*38mm) are mixed and then opened and combed to make dry-rubbed sheet;

[0101] (2) Viscose fiber (1.67dtex*38mm) is opened and combed to form a wet-rubbed sheet;

[0102] (3) Plain woven fabric (70g / m 2 (3) After unwinding, stack the composite fiber layer between the dry-rubbed sheet and the wet-rubbed sheet to form a composite fiber layer; (4) After pre-wetting the composite fiber layer, first send it into the first hydroentangling device, and use two high-pressure hydroentangling heads to perform hydroentangling from the outside of the dry-rubbed sheet (the hydroentangling head pressure is 40kg and 60kg respectively), so that the dry-rubbed sheet, the reinforcing sheet, and the wet-rubbed sheet are connected and fixed to each other; then send it into the second hydroentangling device, attach the side of the dry-rubbed sheet to the surface of the drum, and use three high-pressure hydroentangling heads to perform hydroentangling from the outside of the wet-rubbed sheet (the hydroentangling head pressure is 80kg, 80kg, and 90kg respectively), so that several depressions are formed on the outer surface of the wet-rubbed sheet, and several protrusions are formed on the outer surface of the dry-rubbed sheet to form a reinforced composite fiber layer; wherein: the first hydroentangling mechanism and the second hydroentangling mechanism are both drum hydroentangling, and the drum surface of the second hydroentangling mechanism is provided with a template corresponding to the polygonal protrusions of the dry-rubbed layer;

[0103] (5) First, remove excess moisture from the reinforced composite fiber layer, then dry and roll the composite fiber layer to produce the dry and wet dual-use nonwoven material of this embodiment.

[0104] Example 3

[0105] A nonwoven material suitable for both dry and wet use, with a unit area mass of 114 g / m². 2 The ratio of longitudinal to transverse tensile strength in the dry state is 0.9:1. The structure of this nonwoven material is as follows: Figures 1-3 As shown, the details are as follows:

[0106] The nonwoven material consists of a dry-rubbing layer 1, a reinforcing layer 2, and a wet-rubbing layer 3, which are stacked and connected sequentially. The upper and lower surfaces of the reinforcing layer 2 are fixed to the inner surfaces of the dry-rubbing layer 1 and the wet-rubbing layer 3, respectively. Several protrusions 5 are distributed on the outer surface of the dry-rubbing layer 1, with a distribution density of 9 protrusions / cm². 2The protrusion 5 is hemispherical in shape, and its projected radius on the dry wiping layer 1 is 1 mm; the adjacent protrusions 5 form a recessed dust-holding gap 4. The outer surface of the wet wiping layer 3 is provided with several recesses 6; the positions of the recesses 6 correspond to the protrusions 5 on the outer surface of the dry wiping layer 1.

[0107] Dry rubbing layer 1 is a synthetic fiber nonwoven fabric with a unit area mass of 74 g / m². 2 The composition is: 75% polyester fiber (of which 7.82dtex*32mm accounts for 28% and 3.93dtex*38mm accounts for 47%); 25% ES fiber (2.67dtex*38mm), and the skin melting point is 125℃.

[0108] The wet wiping layer 3 is a spunlace nonwoven fabric with a unit area mass of 29 g / m². 2 It is made of 100% viscose fiber with a fiber specification of 1.67dtex*38mm.

[0109] Reinforcing layer 2 is a polypropylene wire mesh with a unit area mass of 11 g / m². 2 The mesh shape is a quadrilateral with each side length of 6mm, the single filament fineness is 30dtex, and the longitudinal and transverse tensile strengths are 70N / 5cm and 60N / 5cm, respectively.

[0110] The nonwoven material in this embodiment is prepared through the following steps:

[0111] (1) 25% ES fiber (2.67dtex*38mm) and 75% polyester fiber (of which 7.82dtex*32mm accounts for 28% and 3.93dtex*38mm accounts for 47%) are mixed and then opened and carded to make dry-rubbed sheet;

[0112] (2) Viscose fiber (1.67dtex*38mm) is opened and combed to form a wet-rubbed sheet;

[0113] (3) Polypropylene wire mesh with quadrilateral openings (11g / m²) 2 After unwinding, the fiber layer is stacked between the dry-rubbed sheet and the wet-rubbed sheet to form a composite fiber layer.

[0114] (4) After the composite fiber layer is pre-wetted, it is first fed into the first hydroentangling device. Two high-pressure hydroentangling heads are used to hydroentangle from the outside of the dry-rubbed layer sheet (the hydroentangling head pressure is 40 kg and 60 kg respectively), so that the dry-rubbed layer sheet, the reinforcing layer sheet, and the wet-rubbed layer sheet are connected and fixed to each other. Then, it is fed into the second hydroentangling device. The side of the dry-rubbed layer sheet is attached to the surface of the drum. Three high-pressure hydroentangling heads are used to hydroentangle from the outside of the wet-rubbed layer sheet (the hydroentangling head pressure is 80 kg, 80 kg, and 90 kg respectively), so that several depressions are formed on the outer surface of the wet-rubbed layer sheet, and several protrusions are formed on the outer surface of the dry-rubbed layer sheet, thus forming a reinforced composite fiber layer. Among them, the first hydroentangling mechanism and the second hydroentangling mechanism are both drum hydroentangling. The drum surface of the second hydroentangling mechanism is provided with a template corresponding to the hemispherical protrusions of the dry-rubbed layer.

[0115] (5) First, remove excess moisture from the reinforced composite fiber layer, then dry and roll the composite fiber layer to produce the dry and wet dual-use nonwoven material of this embodiment.

[0116] Example 4

[0117] A nonwoven material suitable for both dry and wet use, with a unit area mass of 135 g / m². 2 The ratio of longitudinal to transverse tensile strength in the dry state is 1.1:1. The structure of this nonwoven material is as follows: Figure 1 , Figure 2 and Figure 4 As shown, the details are as follows:

[0118] The nonwoven material consists of a dry-rubbing layer 1, a reinforcing layer 2, and a wet-rubbing layer 3, which are stacked and connected sequentially. The upper and lower surfaces of the reinforcing layer 2 are fixed to the inner surfaces of the dry-rubbing layer 1 and the wet-rubbing layer 3, respectively. Several protrusions 5 are distributed on the outer surface of the dry-rubbing layer 1, with a distribution density of 8 protrusions / cm². 2 The protrusion 5 is hemispherical in shape, and its projected radius on the dry wiping layer 1 is 1.3 mm; the adjacent protrusions 5 form a recessed dust-collecting gap 4. The outer surface of the wet wiping layer 3 is provided with several recesses 6; the positions of the recesses 6 correspond to the protrusions 5 on the outer surface of the dry wiping layer 1.

[0119] Dry rubbing layer 1 is a synthetic fiber nonwoven fabric with a unit area mass of 45 g / m². 2 The composition is: 80% polyester fiber (of which: 33% is 5.08dtex*32mm and 47% is 2.14dtex*38mm); 20% is ES fiber (2.67dtex*38mm), and the skin melting point is 125℃.

[0120] The wet wiping layer 3 is a spunlace nonwoven fabric with a unit area mass of 35 g / m². 2 It is made of 100% viscose fiber with a fiber specification of 1.67dtex*38mm.

[0121] Reinforcing layer 2 is a plain weave fabric with a unit area mass of 55 g / m². 2 The warp and weft density are both 12 threads / 10cm, the yarn count is 20, and the longitudinal and transverse breaking strengths are both 35N / 5cm.

[0122] The nonwoven material in this embodiment is prepared through the following steps:

[0123] (1) 20% ES fiber (2.67dtex*38mm) and 80% polyester fiber (of which 5.08dtex*32mm accounts for 33% and 2.14dtex*38mm accounts for 47%) are mixed and then opened and combed to make dry-rubbed sheet;

[0124] (2) Viscose fiber (1.67dtex*38mm) is opened and combed to form a wet-rubbed sheet;

[0125] (3) Plain woven fabric (55g / m 2 (3) After unwinding, stack the composite fiber layer between the dry-rubbed sheet and the wet-rubbed sheet to form a composite fiber layer; (4) After pre-wetting the composite fiber layer, first send it into the first hydroentangling device, and use two high-pressure hydroentangling heads to perform hydroentangling from the outside of the dry-rubbed sheet (the hydroentangling head pressure is 40kg and 60kg respectively), so that the dry-rubbed sheet, the reinforcing sheet, and the wet-rubbed sheet are connected and fixed to each other; then send it into the second hydroentangling device, attach the side of the dry-rubbed sheet to the surface of the drum, and use three high-pressure hydroentangling heads to perform hydroentangling from the outside of the wet-rubbed sheet (the hydroentangling head pressure is 80kg, 80kg, and 90kg respectively), so that several depressions are formed on the outer surface of the wet-rubbed sheet, and several protrusions are formed on the outer surface of the dry-rubbed sheet to form a reinforced composite fiber layer; wherein: the first hydroentangling mechanism and the second hydroentangling mechanism are both drum hydroentangling, and the drum surface of the second hydroentangling mechanism is provided with a template corresponding to the hemispherical protrusion of the dry-rubbed layer;

[0126] (5) First, remove excess moisture from the reinforced composite fiber layer, then dry and roll the composite fiber layer to produce the dry and wet dual-use nonwoven material of this embodiment.

[0127] Comparative Example 1

[0128] A dry and wet dual-use nonwoven material differs from Example 1 only in that: it does not have a reinforcing layer 2, and the dry rubbing layer 1 and the wet rubbing layer 3 are bonded together by a dotted distribution of polylactic acid adhesive.

[0129] The nonwoven material in this comparative example was prepared through the following steps:

[0130] (1) 20% ES fiber (2.67dtex*38mm) and 80% polyester fiber (of which 30% is 6.6dtex*32mm and 50% is 2.56dtex*38mm) are mixed and then opened and combed to make dry-rubbed sheet;

[0131] (2) Viscose fiber (1.67dtex*38mm) is opened and combed to form a wet-rubbed sheet;

[0132] (3) The dry-rubbed layer sheet and the wet-rubbed layer sheet are bonded together with polylactic acid adhesive distributed in a dotted pattern to form a composite fiber layer; (4) After the composite fiber layer is pre-wetted, it is first sent into the first hydroentangling device, and two high-pressure hydroentangling heads are used to perform hydroentangling from the outside of the dry-rubbed layer sheet (the hydroentangling head pressure is 40kg and 60kg respectively), so that the dry-rubbed layer sheet, the reinforcing layer sheet and the wet-rubbed layer sheet are connected and fixed to each other; then it is sent into the second hydroentangling device, and the side of the dry-rubbed layer sheet is attached to the surface of the drum. Three high-pressure hydroentangling heads are used to perform hydroentangling from the outside of the wet-rubbed layer sheet (the hydroentangling head pressure is 80kg, 80kg and 90kg respectively), so that several depressions are formed on the outer surface of the wet-rubbed layer sheet, and several protrusions are formed on the outer surface of the dry-rubbed layer sheet to form a reinforced composite fiber layer; wherein: the first hydroentangling mechanism and the second hydroentangling mechanism are both drum hydroentangling, and the drum surface of the second hydroentangling mechanism is provided with a template corresponding to the hemispherical protrusion of the dry-rubbed layer;

[0133] (5) First remove excess moisture from the reinforced composite fiber layer, then dry and roll the composite fiber layer to produce a dry and wet dual-use nonwoven material of the same proportion.

[0134] Comparative Example 2

[0135] A dry and wet dual-use nonwoven material, differing from Example 3 only in that: the reinforcing layer 2 is a polypropylene mesh with a unit area mass of 17 g / m². 2 The mesh shape is a quadrilateral with each side length of 3mm, the single filament fineness is 30dtex, and the longitudinal and transverse tensile strengths are 75N / 5cm and 62N / 5cm, respectively. The dry rubbing layer, wet rubbing layer, and the connection relationship between the three layers are the same as in Example 3.

[0136] The preparation method of the nonwoven material in this comparative example is the same as that in Example 3, except that the polypropylene mesh used in step (3) is the same.

[0137] Comparative Example 3

[0138] A dry and wet dual-use nonwoven material, differing from Example 1 only in that: the reinforcing layer 2 is a polypropylene mesh with a unit area mass of 4 g / m². 2The mesh shape is a quadrilateral with each side length of 15mm, the single filament fineness is 20dtex, and the longitudinal and transverse tensile strengths are 41N / 5cm and 36N / 5cm, respectively. The dry rubbing layer, wet rubbing layer, and the connection relationship between the three layers are the same as in Example 1.

[0139] The preparation method of the nonwoven material in this comparative example is the same as that in Example 1, except that the polypropylene mesh used in step (3) is the same.

[0140] Comparative Example 4

[0141] A dry and wet dual-use nonwoven material, differing from Example 3 only in that: the reinforcing layer 2 is a polypropylene mesh with a unit area mass of 13 g / m². 2 The mesh shape is a quadrilateral with each side length of 6mm, the single filament fineness is 40dtex, and the longitudinal and transverse tensile strengths are 76N / 5cm and 62N / 5cm, respectively. The dry rubbing layer, wet rubbing layer, and the connection relationship between the three layers are the same as in Example 3.

[0142] The preparation method of the nonwoven material in this comparative example is the same as that in Example 3, except that the polypropylene mesh used in step (3) is the same.

[0143] Comparative Example 5

[0144] A dry and wet dual-use nonwoven material, differing from Example 2 only in that: the reinforcing layer 2 is a plain weave fabric with a unit area mass of 80 g / m². 2 The warp and weft density are both 20 threads / 10cm, the yarn count is 30, and the longitudinal and transverse breaking strengths are both 51N / 5cm. The dry rubbing layer, wet rubbing layer, and the connection relationship between the three layers are the same as in Example 2.

[0145] The preparation method of the nonwoven material in this comparative example is the same as that in Example 2, except that the plain weave fabric used in step (3) is the same.

[0146] Comparative Example 6

[0147] A dry and wet dual-use nonwoven material, differing from Example 2 only in that: the reinforcing layer 2 is a plain weave fabric with a unit area mass of 77 g / m². 2 The warp and weft density are both 14 threads / 10cm, the yarn count is 40, and the longitudinal and transverse breaking strengths are both 49N / 5cm. The dry rubbing layer, wet rubbing layer, and the connection relationship between the three layers are the same as in Example 2.

[0148] The preparation method of the nonwoven material in this comparative example is the same as that in Example 2, except that the plain weave fabric used in step (3) is the same.

[0149] Comparative Example 7

[0150] A dry and wet dual-use nonwoven material differs from Example 1 only in that the composition of the dry rubbing layer 1 is: 90% polyester fiber (of which 30% is 6.6 dtex*32 mm and 60% is 2.56 dtex*38 mm); 10% ES fiber (2.67 dtex*38 mm), and the skin layer has a melting point of 125°C. The remaining structure is the same as in Example 1.

[0151] The preparation method of the nonwoven material in this comparative example is the same as that in Example 1, except for the dry rubbing layer fiber material used in step (1).

[0152] Comparative Example 8

[0153] A dry and wet dual-use nonwoven material differs from Example 3 only in that the composition of the dry rubbing layer 1 is: 65% polyester fiber (of which 7.82 dtex*32 mm accounts for 28% and 3.93 dtex*38 mm accounts for 37%); 35% ES fiber (2.67 dtex*38 mm), and the skin melting point is 125°C. The remaining structure is the same as in Example 3.

[0154] The preparation method of the nonwoven material in this comparative example is the same as that in Example 3, except for the dry rubbing layer fiber material used in step (1).

[0155] Comparative Example 9

[0156] A nonwoven material suitable for both wet and dry use differs from Example 1 only in that the dry rubbing layer 1 is composed of: 80% polyester fiber (of which 30% is 3.35 dtex * 32 mm and 50% is 1.31 dtex * 38 mm); and 20% ES fiber (1.52 dtex * 38 mm). The skin layer has a melting point of 125°C. The remaining structure is the same as in Example 1.

[0157] The preparation method of the nonwoven material in this comparative example is the same as that in Example 1, except for the dry rubbing layer fiber material used in step (1).

[0158] Comparative Example 10

[0159] A dry and wet dual-use nonwoven material differs from Example 3 only in that the composition of the dry rubbing layer 1 is: 75% polyester fiber (of which 7.82 dtex*32 mm accounts for 15% and 3.93 dtex*38 mm accounts for 60%); 25% ES fiber (2.67 dtex*38 mm), and the skin melting point is 125°C. The rest of the structure is the same as in Example 3.

[0160] The preparation method of the nonwoven material in this comparative example is the same as that in Example 3, except for the dry rubbing layer fiber material used in step (1).

[0161] Comparative Example 11

[0162] A dry and wet dual-use nonwoven material differs from Example 4 only in that: the composition of the dry rubbing layer 1 is: 80% polyester fiber (of which: 45% is 5.08 dtex*32 mm and 35% is 2.14 dtex*38 mm); 20% is ES fiber (2.67 dtex*38 mm), and the skin melting point is 125°C. The remaining structure is the same as in Example 4.

[0163] The preparation method of the nonwoven material in this comparative example is the same as that in Example 4, except for the dry rubbing layer fiber material used in step (1).

[0164] Test case

[0165] The nonwoven materials used in each embodiment and comparative example were tested for their cleaning power and abrasion resistance during dry and wet rubbing.

[0166] Test method:

[0167] (1) Dry wiping dust collection capacity (g / m 2 ):

[0168] ① Cut the material to be tested into 20cm×20cm pieces and weigh them, recording the weight as m1.

[0169] ② Weigh 1 gram of dust and sprinkle it on the designated area of ​​the testing instrument (e.g., Figure 5 (The area marked by the black line on the instrument).

[0170] ③ Spread the sample on the white square slider of the equipment (e.g., Figure 6 Next, place the dry rubbing layer of the sample downwards and fix it with a special clamp (the sample should be longitudinally aligned with the direction of the slide). Start the instrument and rub back and forth for 5 cycles.

[0171] ④ Carefully remove the sample, weigh it, and record the weight as m2.

[0172] ⑤ The amount of dust absorbed per square meter after wiping the material is defined as the dust absorption capacity.

[0173] (2) Wet rubbing liquid absorption (%): Tested according to GB / T 24218.6 "Textiles - Test methods for nonwoven fabrics - Part 6: Determination of absorbency".

[0174] (3) Elongation at break (%): Tested in accordance with GB / T / 24218.3 "Textiles - Test methods for nonwoven fabrics - Part 3: Determination of breaking strength and elongation at break (strip method)".

[0175] The test results are shown in Table 1.

[0176] Table 1. Material performance test results

[0177]

[0178]

[0179] As can be seen from Table 1:

[0180] (1) Compared with Comparative Example 1, the nonwoven material of Example 1 has a smaller elongation at break and a larger amount of dust absorption during dry wiping. This is because: Example 1, by setting a reinforcing layer between the dry wiping layer and the wet wiping layer, can reduce the degree of deformation of the nonwoven material during use, thereby improving the wear resistance of the nonwoven material and reducing the degree of deformation of the dust-holding pores during use, thus reducing the shedding of dust adsorbed in the dust-holding pores due to repeated deformation.

[0181] (2) Compared with Comparative Example 2, the nonwoven material of Example 3 has a smaller elongation at break and a larger amount of dust absorption during dry rubbing. This is because: in the reinforcing layer used in Comparative Example 2, the mesh side length is too small. Although it can improve the structural strength of the reinforcing layer, it is not conducive to the formation of fiber entanglement between the reinforcing layer and the dry rubbing layer and wet rubbing layer. Therefore, the reinforcing effect of the reinforcing layer is weakened, and the nonwoven material has a larger degree of deformation during use.

[0182] (3) Compared with Comparative Example 3, the nonwoven material of Example 1 has a smaller elongation at break and a higher dry-rubbing dust absorption and wet-rubbing liquid absorption. This is because: in the reinforcing layer used in Comparative Example 3, the mesh side length is too large, which makes the reinforcing layer less restrictive of the displacement of fibers in the dry-rubbing layer and wet-rubbing layer. As a result, the outer surface of the dry-rubbing layer formed after hydroentangling is not well convex and the outer surface of the wet-rubbing layer is not well convex. The former will weaken the dust holding effect of the dry-rubbing layer, and the latter will reduce the surface area of ​​the wet-rubbing layer, affecting the water absorption of the wet-rubbing layer.

[0183] (4) The dry dust absorption and wet liquid absorption of the nonwoven material in Example 3 are higher than those in Comparative Example 4, and the dry dust absorption and wet liquid absorption of the nonwoven material in Example 2 are higher than those in Comparative Example 6. This is because: in the reinforcing layer used in Comparative Example 4, the fineness of the monofilaments is too large, which will cause large protrusions at their interlacing points. During use, the polypropylene mesh is easily exposed on the surface of the nonwoven material, thus affecting the function of the dry and wet rubbing layers; similarly, in the reinforcing layer used in Comparative Example 6, the yarn count is too large, which will also cause the yarn to be easily exposed on the surface when the nonwoven material is used.

[0184] (5) Compared with Comparative Example 5, the nonwoven material of Example 2 has a smaller elongation at break and a larger amount of dust absorption during dry rubbing. This is because: in the reinforcing layer used in Comparative Example 5, the warp and weft densities are too large. Although this can improve the structural strength of the reinforcing layer, the fabric structure is too compact, which is not conducive to the formation of entanglement between the fibers and the dry rubbing layer fibers and the wet rubbing layer fibers. Therefore, the effect of improving the tensile deformation resistance of the nonwoven material is relatively weak.

[0185] (6) Compared with Comparative Example 7, the dry wiping dust collection volume of Example 1 is larger. This is because: in the dry wiping layer used in Comparative Example 7, the proportion of hot melt bonded fiber (ES fiber) is small. When the non-woven material is used, the degree of deformation of its dust-holding pores is large, and the dust adsorbed therein is easily detached during repeated deformation.

[0186] (7) Compared with Comparative Example 8, the amount of dust collected by dry wiping in Example 3 is greater. This is because the content of hot melt adhesive fibers in the dry wiping layer of Comparative Example 8 is too high, which increases the hardness of the material. The material becomes stiff during wiping, which is not conducive to the removal and storage of dust by the dry wiping layer.

[0187] (8) The dust absorption of the nonwoven dry-rubbed layer in Comparative Example 9 was less than that in Example 1, the dust absorption of the dry-rubbed layer in Comparative Example 10 was less than that in Example 3, and the dust absorption of the dry-rubbed layer in Comparative Example 11 was less than that in Example 4. This is because: in the dry-rubbed layer, the ratio between fibers of different fineness and the fiber fineness will affect the porosity and pore size of the dry-rubbed layer. Only when the dry-rubbed layer has a high porosity and a moderate pore size can a good dust-holding effect be achieved; while in Comparative Examples 9 to 11, the fiber fineness or the ratio between different fibers was inappropriate, resulting in poor dust-holding effect.

[0188] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0189] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A nonwoven material suitable for both dry and wet use, characterized in that, The system comprises a dry-rubbing layer, a reinforcing layer, and a wet-rubbing layer stacked sequentially, with the dry-rubbing layer and reinforcing layer accounting for 30-65% and 8-47% of their respective mass percentages. The two sides of the reinforcing layer are fixedly connected to the inner surfaces of the dry-rubbing layer and the wet-rubbing layer, respectively. The outer surface of the dry-rubbing layer consists of several protrusions and dust-collecting voids recessed between adjacent protrusions. The wet-rubbing layer contains absorbent material. The outer surface of the wet-rubbing layer has several recesses, the positions of which correspond to the protrusions on the outer surface of the dry-rubbing layer. The dry-rubbing layer contains 20-25% hot-melt bonding fibers by mass. The dry-rubbing layer is composed of coarse fibers with a fineness of 5-8 dtex and fine fibers with a fineness of 2-4 dtex mixed and wound together at a mass ratio of 1:2.0-2.

6. The reinforcing layer is A or B. A. Synthetic wire mesh with quadrilateral mesh shape: the length of each side of the quadrilateral is 6~11mm, the tensile strength of the transverse and longitudinal directions of the synthetic wire mesh is 40~60N / 5cm and 45~70N / 5cm respectively, and the fineness of the single filament is 20~30dtex; B. Woven fabrics: warp and weft density 12~14 threads / 10cm, longitudinal and transverse breaking strength 35~45N / 5cm, yarn count 20~30.

2. The nonwoven material according to claim 1, characterized in that, The hot-melt adhesive fiber accounts for 20% or 25% of the mass of the dry-rubbed layer.

3. The nonwoven material according to claim 1, characterized in that, The ratio of the dry longitudinal to transverse tensile strength of the nonwoven material is 0.7 to 1.4:

1.

4. The nonwoven material according to claim 3, characterized in that, The dry longitudinal and transverse tensile strength ratio of the nonwoven material is 0.9:1, 1.1:1, or 1.2:

1.

5. The nonwoven material according to claim 1, characterized in that, The nonwoven material has a basis weight of 50~150g / m². 2 .

6. The nonwoven material according to claim 5, characterized in that, The nonwoven material has a basis weight of 65 g / m². 2 114g / m 2 135g / m 2 Or 150g / m 2 .

7. A method for preparing a nonwoven material according to any one of claims 1 to 6, characterized in that, Includes the following steps: (1) The dry-friction layer fiber material is made into a dry-friction layer sheet; (2) The wet-rubbed fiber material is made into a wet-rubbed sheet; (3) The reinforcing layer sheet is stacked between the dry-rubbed layer sheet and the wet-rubbed layer sheet to form a composite fiber layer; (4) The composite fiber layer is fed into the hydroentanglement system to fix the dry rubbing layer sheet, the reinforcing layer sheet and the wet rubbing layer sheet together, and a number of depressions are formed on the outer surface of the wet rubbing layer sheet, while a number of protrusions are formed on the outer surface of the dry rubbing layer sheet to form a reinforced composite fiber layer. (5) The reinforced composite fiber layer is dried to produce the dry and wet dual-use nonwoven material.

8. The preparation method according to claim 7, characterized in that, In step (4), the method of forming several depressions on the outer surface of the wet rubbing layer sheet and several protrusions on the outer surface of the dry rubbing layer sheet is as follows: In the drum hydroentangling device, the dry rubbing layer sheet in the composite fiber layer is attached to the drum. The surface of the drum is provided with a template corresponding to the protrusions of the dry rubbing layer, and hydroentangling is performed from the outside of the wet rubbing layer sheet.

9. The application of the nonwoven material according to any one of claims 1 to 6 in floor mops.

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