Self-pore-forming rapid infiltration type hot air non-woven fabric and preparation method thereof

Abstract

The invention discloses a self-pore-forming quick-seepage type hot air non-woven fabric which comprises main body short fibers, the main body short fibers are combed into a net and then penetrate through a fiber net through hot air and are heated, so that the outer surface layers of the main body short fibers are fused and then mutually bonded to form a non-woven fabric base material; a certain proportion of pore-forming short fibers are mixed in the main body short fibers, the thermal shrinkage temperature of the pore-forming short fibers is lower than that of the main body short fibers, the thermal shrinkage temperature of the pore-forming short fibers and the melting temperature of the skin layers of the main body short fibers are located in the same temperature zone, and the melting temperature of the skin layers of the pore-forming short fibers is equal to or lower than that of the skin layers of the main body short fibers. When the non-woven fabric base cloth is heated and bonded into cloth, the pore-forming short fibers close the main body short fibers bonded with the pore-forming short fibers, so that a plurality of gap channels are formed in the non-woven fabric base cloth. The invention further discloses a preparation method of the self-pore-forming quick-permeation type hot air non-woven fabric. According to the invention, the infiltration speed of the non-woven fabric base material is effectively increased, the residue of the flowable viscous material is reduced, and meanwhile, the smoothness of the non-woven fabric base material can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of nonwoven fabrics, and in particular to a self-poring fast-permeating hot air nonwoven fabric and a preparation method thereof. Background Art

[0002] PE / PP and PE / PET short fiber hot air nonwoven fabrics are low-cost and have excellent softness and skin-friendly properties. They are one of the most commonly used substrates for the surface of absorbent sanitary care products (such as sanitary napkins, diapers, nursing pads, etc.). However, there are also some problems. For example, when the fineness (denier) of the fiber is lower than a certain range, such as ultra-fine denier fiber, the material made of it, due to the denser arrangement of the surface fibers, makes the infiltration rate of human liquid excrement decrease and the surface residue increase when the product is used, which will obviously seriously affect the consumer's experience.

[0003] The decrease in the infiltration rate can easily lead to an increase in the cross-flow area of ​​liquid excrement (absorbents, such as menstrual blood, urine, and loose stools) on the surface of products such as sanitary napkins and diapers, which is difficult to control, resulting in an increase in the incidence of side leakage and front and back leakage. In addition, the dense fiber arrangement will also increase the residue of excrement (such as menstrual blood, loose stools, etc.) on the surface of the product, which will not only seriously affect the consumer's experience due to the increase in stickiness and dampness, but also affect the health of the consumer's use parts such as female private parts due to the rapid fission of microorganisms in the residues.

[0004] Hot air nonwoven fabrics are made of hot air short fibers combed into a web, and the fiber surface (cortex or shell layer) is melted by hot air, and the fibers adhere to each other and cool into cloth. Obviously, if the basis weight of the substrate remains unchanged, and the smaller the fiber diameter (denier), the fluffier and softer the substrate will be, the more "dense" the fiber arrangement will be, and the smaller the gap between the fibers will be.

[0005] On the market, most sanitary products, especially sanitary napkins, will directly use the base fabric (commonly known as "flat cloth") produced by the hot air process, because such a base material is soft and silky, and visually warm and clean. As mentioned earlier, absorbent sanitary care products are expected to have a good infiltration rate and low surface residue, but the smaller the fiber denier, the smoother, more skin-friendly and comfortable it is, but the problem is that it has a negative impact on the infiltration rate and surface residue performance. Therefore, based on laboratory verification and actual consumer experience, the industry consensus is that when hot air non-woven fabrics are used as flat cloths, their fiber denier should not be less than 1.5 denier.

[0006] In the same basis weight (gsm or g / M 2 ), the finer the denier of the hot air staple fiber, the higher the number density of the fiber distribution, and the smaller the gap between the fibers. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the electron microscope of the coarse-denier fiber base cloth. Figure 2 It is an electron microscope diagram of a fine-denier fiber-based cloth. When the denier is less than a certain value, based on experience (laboratory testing and consumer experience), it is chosen as the surface layer of certain products because its penetration rate and surface residue will be lower than the lower limit of consumer demand, thus being restricted.

[0007] Therefore, when using hot air plain weave substrates for the surface layer of sanitary products such as sanitary napkins and diapers, in principle, the denier should not be lower than 1.5, and preferably 2 denier or above. With double-layer paving (upper fine denier + lower coarse denier) and strict control of structure and process, it can be as low as 1.2 denier. As for ultra-fine denier (<1.2D, such as 1D, 0.8D, etc.), if the plain weave substrate is directly used for the surface layer of sanitary products such as sanitary napkins and diapers, it will be "disastrous". Although it is very smooth and skin-friendly, it has no practical value due to a high proportion of customer complaints such as side leakage and stickiness.

[0008] Theoretically, the distribution of fibers on the nonwoven surface should be uniform. All hot air nonwoven equipment takes improving or ensuring the uniformity of the surface as the most important consideration. The "macro" surface uniformity is the premise for whether the mechanical properties of nonwovens are compliant and stable, and the "micro" uniformity is also the premise for the "macro" uniformity under the current hot air nonwoven process technology conditions.

[0009] Inspired by the secondary punching process of non-woven fabric substrates, punching non-woven fabric substrates with good macroscopic uniformity to create microscopic unevenness and artificially create "coarse" infiltration channels, thereby increasing the infiltration rate of the substrate and reducing the excrement residue on the surface of the substrate is a feasible and effective method. Figure 3 Obviously, the secondary punching of the perforated nonwoven fabric will destroy the original smoothness of the substrate and greatly increase the manufacturing cost of the substrate.

[0010] With the continuous advancement of fiber technology, mass production of hot air fibers with a denier of 1 or less has become a reality, and the smoothness of the base fabric has been qualitatively improved. However, due to the lack of effective solutions to the problems of infiltration speed and surface residue, this type of non-woven fabric substrate is currently limited to applications such as the back of diapers where there is no infiltration requirement, which is completely "overkill". Obviously, such a phenomenon of "subsequent applications lagging behind the front end of the supply chain" is a constraint on the application of innovative materials. Therefore, how to use fine denier fibers to effectively increase their infiltration speed and reduce the surface residue of excrement while maintaining their smoothness to the greatest extent is a major technical problem in the industry.

[0011] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research, and the technical solution to be introduced below is produced in this context. Summary of the invention

[0012] One of the technical problems to be solved by the present invention is to provide a self-poring fast-permeable hot air nonwoven fabric with improved infiltration speed in view of the deficiencies of the prior art.

[0013] The second technical problem to be solved by the present invention is to provide a method for preparing the above-mentioned self-porous and fast-permeable hot air non-woven fabric.

[0014] As a first aspect of the present invention, a self-poring fast-permeable hot air nonwoven fabric comprises main staple fibers, which are combed into a web and then penetrated by hot air and heated, so that the outer layers of the main staple fibers melt and then bond to each other to form a nonwoven fabric substrate;

[0015] A certain proportion of hole-forming staple fibers are mixed in the main staple fibers, the thermal shrinkage temperature of the hole-forming staple fibers is lower than that of the main staple fibers, the thermal shrinkage temperature of the hole-forming staple fibers and the melting temperature of the cortex of the main staple fibers are in the same temperature zone, the melting temperature of the cortex of the hole-forming staple fibers is equal to or lower than the melting temperature of the cortex of the main staple fibers, and when heated and bonded into cloth, the hole-forming staple fibers will be closer to the main staple fibers to which they are adhered, resulting in a sparse and dense distribution, so that a plurality of gap channels are formed in the non-woven fabric base cloth.

[0016] In a preferred embodiment of the present invention, the plurality of gap channels are gap channels caused by uneven distribution of main staple fibers due to adhesion and shrinkage of the apertured staple fibers.

[0017] In a preferred embodiment of the present invention, the proportion of the hole-forming staple fibers is less than 50%.

[0018] In a preferred embodiment of the present invention, the main staple fiber is one of bicomponent PE / PET staple fibers, PE / PP staple fibers, PLA / PET staple fibers, and PLA / PP staple fibers.

[0019] In a preferred embodiment of the present invention, the hole-forming staple fibers are one of bicomponent PE / PET staple fibers, PE / PP staple fibers, PLA / PET staple fibers, and PLA / PP staple fibers.

[0020] In a preferred embodiment of the present invention, the hole-forming staple fibers are one of single-component PP staple fibers, PLA staple fibers, PE staple fibers or EVA staple fibers.

[0021] As a second aspect of the present invention, a method for preparing the self-porous fast-permeable hot air nonwoven fabric comprises the following steps:

[0022] Step S10, opening: using an opening machine to open the main staple fibers and the hole-forming staple fibers respectively;

[0023] Step S20, blending: sending the opened main staple fibers and the hole-forming staple fibers into a blending machine in a certain proportion for mixing, so that the main staple fibers and the hole-forming staple fibers are fully mixed;

[0024] Step S30, feeding cotton: feeding the mixed main staple fibers and hole-forming staple fibers into the carding machine quantitatively and evenly through a quantitative cotton feeding device to ensure uniform distribution of the fibers during the carding process;

[0025] Step S40, combing: using a combing machine to comb the mixed main staple fibers and hole-forming staple fibers to form a mesh fiber thin layer;

[0026] Step S50, laying the web: evenly laying the combed mesh fiber thin layer through a web laying machine, adjusting the width and number of layers of the mesh fiber thin layer so that the mesh fiber thin layer is evenly distributed in the horizontal and vertical directions to form a fiber web with a certain thickness and width;

[0027] Step S60, hot air shaping: sending the laid fiber web into an oven, and heating the fiber web with high-pressure hot air, so that the fiber surface is thermally melted at high temperature, and the molten parts between the fibers are bonded to each other, forming a non-woven fabric structure with certain strength and stability;

[0028] Step S70, cloth forming: the non-woven fabric after hot air setting is ironed by an ironing device, and is rolled into a roll by a winding device.

[0029] Due to the adoption of the above technical scheme, the beneficial effect of the present invention is that: the present invention mixes low-temperature pore-forming staple fibers into high-temperature main staple fibers. Since the main staple fibers and the pore-forming staple fibers have different thermal shrinkage and melting temperatures, when heated and bonded into cloth, the pore-forming staple fibers shrink and even melt due to the heat, and the pore-forming staple fibers will shorten the distance between the main staple fibers adhered to them, so that a relatively large gap is formed between adjacent pore-forming staple fibers and / or main staple fibers in a microscopic state, that is, a gap channel with a high-speed infiltration function, which effectively increases the infiltration speed of the non-woven fabric substrate, improves the lateral cross-flow of liquid during use, reduces the residue of human excrement on the product surface, and at the same time can also maximize the smooth skin-friendly performance of the fine denier non-woven fabric substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is an electron microscope schematic diagram of a coarse-denier fiber-based cloth.

[0032] Figure 2 This is an electron microscope schematic diagram of a fine-denier fiber-based cloth.

[0033] Figure 3 It is a schematic diagram of a perforated nonwoven fabric.

[0034] Figure 4 It is an electron microscope schematic diagram of the hole-forming staple fibers uniformly distributed within the main staple fibers of the present invention.

[0035] Figure 5 It is a schematic diagram of the pore-forming principle of the present invention.

[0036] Figure 6 It is a flow chart of the preparation method of the present invention. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0038] See also Figure 4 and Figure 5 , the figure shows a self-poring fast-permeable hot air nonwoven fabric, including main staple fibers 100 and pore-forming staple fibers 200. The pore-forming staple fibers 200 are uniformly mixed in the main staple fibers 100, the thermal shrinkage temperature of the pore-forming staple fibers 200 is lower than the thermal shrinkage temperature of the main staple fibers 100, the thermal shrinkage temperature of the pore-forming staple fibers 200 and the melting temperature of the cortex of the main staple fibers 100 are in the same temperature range, and the melting temperature of the cortex of the pore-forming staple fibers 200 is equal to or lower than the melting temperature of the cortex of the main staple fibers 100.

[0039] In this embodiment, the proportion of the hole-forming staple fibers 200 is less than 50%, preferably less than 20%. The main staple fibers 100 may be bicomponent staple fibers such as PE / PET staple fibers, PE / PP staple fibers, PLA / PET staple fibers, PLA / PP staple fibers, etc. The hole-forming staple fibers 200 may be bicomponent staple fibers such as PE / PET staple fibers, PE / PP staple fibers, PLA / PET staple fibers, PLA / PP staple fibers, etc., or monocomponent staple fibers such as PP staple fibers, PLA staple fibers, PE staple fibers or EVA staple fibers.

[0040] The main staple fibers 100 and the hole-forming staple fibers 200 are evenly mixed and then carded into a web. Figure 4As shown, hot air penetrates the fiber web and is thermally bonded to form a nonwoven fabric substrate. Since the heat shrinkage temperature of the main staple fibers 100 and the hole-forming staple fibers 200 is different, when thermally bonded, the main staple fibers 100 and the hole-forming staple fibers 200 are melted and bonded due to heat, while the hole-forming staple fibers 200 shrink, and the hole-forming staple fibers 200 will be closer to the main staple fibers 100 to which they are bonded, resulting in a sparse and dense distribution, so that multiple large gaps are formed between adjacent hole-forming staple fibers 200 and / or main staple fibers 100, that is, gap channels 10 with high-speed infiltration function, and the pore sizes of these gap channels 10 are uniform and different, such as Figure 5 As shown, the penetration rate of the non-woven fabric substrate is effectively improved, the residual fluid viscous matter is reduced, and the smooth performance of the non-woven fabric substrate is also ensured.

[0041] See also Figure 6 , the figure shows a method for preparing a self-porous fast-permeable hot air nonwoven fabric of the present invention, comprising the following steps:

[0042] Step S10, opening: using an opening machine to open the main staple fibers and the hole-forming staple fibers respectively;

[0043] Step S20, blending: sending the opened main staple fibers and the hole-forming staple fibers into a blending machine in a certain proportion for mixing, so that the main staple fibers and the hole-forming staple fibers are fully mixed;

[0044] Step S30, feeding cotton: feeding the mixed main staple fibers and hole-forming staple fibers into the carding machine quantitatively and evenly through a quantitative cotton feeding device to ensure uniform distribution of the fibers during the carding process;

[0045] Step S40, combing: using a combing machine to comb the mixed main staple fibers and hole-forming staple fibers to form a mesh fiber thin layer;

[0046] Step S50, laying the web: evenly laying the combed mesh fiber thin layer through a web laying machine, adjusting the width and number of layers of the mesh fiber thin layer so that the mesh fiber thin layer is evenly distributed in the horizontal and vertical directions to form a fiber web with a certain thickness and width;

[0047] Step S60, hot air shaping: the laid fiber web is sent into an oven, and the fiber web is heated by high-pressure hot air, so that the fiber surface is thermally melted at high temperature, and the molten parts between the fibers are bonded to each other to form a non-woven fabric structure with certain strength and stability; the oven adopts multiple temperature zones for hot air treatment.

[0048] Step S70, cloth forming: the non-woven fabric after hot air setting is ironed by an ironing device, and is rolled into a roll by a winding device.

[0049] According to the above preparation method, the present invention provides the following application embodiments:

[0050] Application Example 1

[0051] This application example is a 25gsm fine denier silk slip fast permeable hot air nonwoven fabric, specifically as follows:

[0052] 1. Fiber combination

[0053] The main staple fiber adopts 1 denier PE / PP (ES fiber, the skin layer is low melting point PE, the core layer is high melting point PP) fine denier conventional hot air staple fiber, which is hydrophilic, with a proportion of 85%; the hole-forming staple fiber adopts 2 denier PE / PP (the skin layer is low melting point PE, the core layer is low melting point PP) low temperature fiber, which is water-repellent, with a proportion of 15%.

[0054] 2. Fiber thermal properties

[0055] The main staple fiber adopts conventional hot air fiber, the melting temperature of PE cortex is 110℃~130℃, and the melting dimension of PP core layer is 150℃~170℃; the hole-forming staple fiber adopts special low-temperature fiber, the melting dimension of cortex is 110℃~120℃, and the heat shrinkage temperature of PP core layer is 120℃~130℃ (melting temperature 135℃~145℃). In general, the melting temperature of the cortex of the hole-forming staple fiber is in the same temperature zone as the main staple fiber and the value is taken as the lower line, and its heat shrinkage temperature is also in the same temperature zone as the melting temperature of the cortex of the main staple fiber.

[0056] 3. Hot air fabric forming process

[0057] The main process parameters are: the mixing ratio of main staple fibers and hole-forming staple fibers is 85:15; the final winding speed is 80m / min; the heating temperatures of the three-stage heating oven are 100℃, 120℃, and 135℃.

[0058] 4. Absorption performance

[0059] The pressure absorption speed is less than 15s (close to and reaches the level of 1.5 denier hot air nonwoven fabric).

[0060] Application Example 2

[0061] This application example is a 22gsm ultra-fine silk slip-through hot air nonwoven fabric, specifically as follows:

[0062] 1. Fiber combination

[0063] The main staple fiber adopts 0.8 denier PE / PET (the skin layer is low melting point PE, the core layer is PET) ultra-fine denier conventional hot air staple fiber, which is hydrophilic, with a proportion of 80%; the hole-forming staple fiber adopts 2 denier PE / PP (the skin layer is low melting point PE, the core layer is low melting point PP) low temperature fiber, which is water-repellent, with a proportion of 20%.

[0064] 2. Fiber thermal properties

[0065] The main staple fiber adopts conventional hot air fiber, the melting temperature of PE cortex is 110℃~130℃, and the melting dimension of PET core layer is 255℃~260℃; the hole-forming staple fiber is a special low-temperature fiber, the melting dimension of cortex is 110℃~120℃, and the heat shrinkage temperature of PP core layer is 120℃~130℃ (melting temperature 135℃~145℃). In general, the melting temperature of the cortex of the hole-forming staple fiber is in the same temperature zone as the main staple fiber and the value is taken as the lower line, and its heat shrinkage temperature is also in the same temperature zone as the melting temperature of the cortex of the main staple fiber.

[0066] 3. Hot air fabric forming process

[0067] The main process parameters are: the mixing ratio of main staple fibers and hole-forming staple fibers is 80:20; the final winding speed is 100m / min; the heating temperatures of the three-stage heating oven are 110℃, 130℃, and 140℃.

[0068] 4. Absorption performance

[0069] The pressure absorption speed is less than 15s (close to and reaches the level of 1.5 denier hot air nonwoven fabric).

[0070] Application Example 3

[0071] This application example is a 22gsm fine denier bio-based skin-friendly deodorizing silky hot air nonwoven fabric, specifically as follows:

[0072] 1. Fiber combination

[0073] The main staple fiber adopts 1 denier PE / PET (the skin layer is low melting point PE, the core layer is PET) ultra-fine denier conventional hot air staple fiber, which is hydrophilic and has a proportion of 70%; the hole-forming staple fiber adopts 2 denier PLA low-temperature biological staple fiber, which is hydrophilic and has a proportion of 30%.

[0074] 2. Fiber thermal properties

[0075] The main staple fiber adopts conventional hot air fiber, the PE skin layer melting temperature is 110℃~130℃, and the PET core layer melting dimension is 255℃~260℃; the hole-forming staple fiber adopts special low-temperature PLA staple fiber, with an initial melting temperature of 120℃~135℃ and a heat shrinkage temperature of 110℃~130℃.

[0076] 3. Hot air fabric forming process

[0077] The main process parameters are: the mixing ratio of main staple fiber and hole-forming staple fiber is 70:30; the final winding speed is 80m / min; the heating temperatures of the three-stage heating oven are 100℃, 125℃ and 140℃.

[0078] 4. Absorption performance

[0079] The pressure absorption speed is less than 15s (close to and reaches the level of 1.5 denier hot air nonwoven fabric).

[0080] Application Example 4

[0081] This application example is a 22gsm ultra-fine denier ultra-soft fast-permeable hot air nonwoven fabric, specifically as follows:

[0082] 1. Fiber combination

[0083] The main staple fiber adopts 0.8 denier PE / PET (the skin layer is low melting point PE, the core layer is PET) ultra-fine denier conventional hot air staple fiber, which is hydrophilic and has a proportion of 85%; the hole-forming staple fiber adopts 2 denier PE low-temperature staple fiber, which is water-repellent and has a proportion of 15%.

[0084] 2. Fiber thermal properties

[0085] The main staple fiber is a conventional hot air fiber, the PE skin layer melting temperature is 110℃~130℃, and the PET core layer melting dimension is 255℃~260℃; the hole-forming staple fiber is a special low-temperature PE staple fiber, with an initial melting temperature of 110℃~130℃ and a thermal shrinkage temperature of 120℃~140℃.

[0086] 3. Hot air fabric forming process

[0087] The main process parameters are: the mixing ratio of main staple fibers and hole-forming staple fibers is 85:15; the final winding speed is 80m / min; the heating temperatures of the three-stage heating oven are 100℃, 120℃, and 135℃.

[0088] 4. Absorption performance

[0089] The pressure absorption speed is less than 15s (close to and reaches the level of 1.5 denier hot air nonwoven fabric).

[0090] Table 1: Pressure absorption rate table of self-pored fine denier hot air nonwoven fabric (unit: s)

[0091]

[0092] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A self-poring fast-permeable hot air nonwoven fabric, comprising main staple fibers, which are combed into a web and then heated by hot air penetrating the web, so that the outer layers of the main staple fibers melt and then bond to each other to form a nonwoven fabric substrate; characterized in that: A certain proportion of hole-forming staple fibers are mixed in the main staple fibers, the thermal shrinkage temperature of the hole-forming staple fibers is lower than that of the main staple fibers, the thermal shrinkage temperature of the hole-forming staple fibers and the melting temperature of the cortex of the main staple fibers are in the same temperature zone, the melting temperature of the cortex of the hole-forming staple fibers is equal to or lower than the melting temperature of the cortex of the main staple fibers, and when heated and bonded into cloth, the hole-forming staple fibers will shorten the distance between them and the bonded main staple fibers to form a sparse and dense distribution, thereby forming a plurality of gap channels in the non-woven fabric base cloth.

2. The self-poring fast-permeable hot air nonwoven fabric according to claim 1, characterized in that: The gap channels are gap channels caused by uneven distribution of main staple fibers due to adhesion and shrinkage of the pore-forming staple fibers.

3. The self-poring fast-permeable hot air nonwoven fabric according to claim 2, characterized in that: The proportion of the hole-forming short fibers is less than 50%.

4. The self-poring fast-permeable hot air nonwoven fabric according to claim 1, characterized in that: The main staple fibers are one of bicomponent PE / PET staple fibers, PE / PP staple fibers, PLA / PET staple fibers, and PLA / PP staple fibers.

5. The self-poring fast-permeable hot air nonwoven fabric according to claim 1, characterized in that: The hole-forming staple fibers are one of bicomponent PE / PET staple fibers, PE / PP staple fibers, PLA / PET staple fibers, and PLA / PP staple fibers.

6. The self-poring fast-permeable hot air nonwoven fabric according to claim 1, characterized in that: The hole-forming staple fibers are one of single-component PP staple fibers, PLA staple fibers, PE staple fibers or EVA staple fibers.

7. A method for preparing a self-poring fast-permeable hot air nonwoven fabric according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S10, opening: using an opening machine to open the main staple fibers and the hole-forming staple fibers respectively; Step S20, blending: sending the opened main staple fibers and the hole-forming staple fibers into a blending machine in a certain proportion for mixing, so that the main staple fibers and the hole-forming staple fibers are fully mixed; Step S30, feeding cotton: feeding the mixed main staple fibers and hole-forming staple fibers into the carding machine quantitatively and evenly through a quantitative cotton feeding device to ensure uniform distribution of the fibers during the carding process; Step S40, combing: using a combing machine to comb the mixed main staple fibers and hole-forming staple fibers to form a mesh fiber thin layer; Step S50, laying the web: evenly laying the combed mesh fiber thin layer through a web laying machine, adjusting the width and number of layers of the mesh fiber thin layer so that the mesh fiber thin layer is evenly distributed in the horizontal and vertical directions to form a fiber web with a certain thickness and width; Step S60, hot air shaping: sending the laid fiber web into an oven, and heating the fiber web with high-pressure hot air, so that the fiber surface is thermally melted at high temperature, and the molten parts between the fibers are bonded to each other, forming a non-woven fabric structure with certain strength and stability; Step S70, cloth forming: the non-woven fabric after hot air setting is ironed by an ironing device, and is rolled into a roll by a winding device.

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