Ultra-soft water-jet fabric without additives and preparation method thereof

Abstract

The application discloses a kind of no addition super-soft water-jet fabric and its preparation method.The raw material of the application is regenerated cellulose fiber, including viscose, modal, lyocell in one or different proportions of mixed preparation, which is prepared by viscose, modal or lyocell process from 100% cotton pulp (cotton linter) as raw material, different from the fiber prepared from wood pulp as raw material.The above-mentioned fiber has low initial modulus, and the fiber itself is relatively soft, and the fiber is the basis for preparing super-soft water-jet fabric.Using different denier fibers, different softness of water-jet fabric can be prepared, and fine denier products have better softness.The patent uses the above-mentioned raw material, improves the carding machine and adjusts the configuration of the needle cloth, and repeatedly water-jet with multiple drums and multiple water-jet heads to prepare water-jet fabric with no addition super-soft, high water absorption and low fuzz and pilling.The product is green and environmentally friendly, biobased and biodegradable, and can be recycled and sustainable.

Description

Technical Field

[0001] This invention relates to the field of spunlace fabric technology, and in particular to an additive-free ultra-soft spunlace fabric and its preparation method. Background Technology

[0002] As a primary raw material in the wiping field, spunlace nonwovens are facing increasing demands for softness and skin-friendliness due to rising living standards. Existing technology CN208362781U has developed ultra-soft nonwoven fabrics by uniformly distributing three functional areas—connecting zone, reinforcing zone, and softening zone—to improve the softness and durability of the nonwoven fabric. However, this method requires processing from three different types of fibers with varying properties and controlling the proportion of each fiber, making the process quite complex. Furthermore, the use of silk fibers as the softening zone in this process results in high production costs.

[0003] The prior art CN113737413A discloses a processing apparatus and method for ultra-soft wiping spunlace nonwoven fabric, which involves delivering fabric softener from a storage tank to an atomizing nozzle via a booster pump. This enhances the softness of the nonwoven fabric by uniformly spraying the fabric softener.

[0004] The prior art CN112779701A discloses a softening system for pure cotton spunlace nonwoven fabric, which includes a tension roller, a first coating roller, a second coating roller and an oven arranged in sequence. The system increases the softness of the nonwoven fabric by coating a softener in multiple stages.

[0005] Currently, existing ultra-soft spunlace nonwoven fabrics are mainly achieved by adding creams, glycerin, or softeners. This method reduces the product's absorbency. In addition, the above-mentioned additives increase the risk of microbial control, requiring the addition of bactericides and preservatives. This will affect the product's shelf life and aging durability, and will also increase the risk of skin irritation and sensitization.

[0006] Therefore, it is necessary to provide an additive-free ultra-soft spunlace fabric and its preparation method to solve the above-mentioned technical problems. Summary of the Invention

[0007] This invention overcomes the shortcomings of the prior art by providing an additive-free ultra-soft spunlace fabric and its preparation method.

[0008] To achieve the above objectives, the technical solution adopted by this invention is: a method for preparing additive-free ultra-soft spunlace fabric, comprising the following steps:

[0009] S1, Open Clear: (This likely refers to a specific process or method) The fibers, as raw materials, undergo preliminary opening and dust removal, and are then treated with antistatic agents; The fiber is derived from 100% cotton linters, the crystallinity is 40.0-50.0%, the fiber linear density is 0.5-2D, the initial modulus is 15-31 cN / dtex, and the elongation at break is 20.3-62.0%;

[0010] S2, carding: the fiber raw material is finely carded using a modified carding machine, the surface of the main cylinder and the breast cylinder is a perforated structure, suction and blowing devices are arranged inside, the diameter of the breast cylinder is less than or equal to the diameter of the main cylinder, and the wire density of the main cylinder working unit is greater than the wire density of the breast cylinder working unit;

[0011] S3, water jet reinforcement: through repeated water jetting of multiple drums and multiple water jet heads with low water jet pressure, a high-power vacuum suction device is used, and the longitudinal / transverse breaking strength ratio of the obtained web is greater than or equal to 1:1;

[0012] S4, drying and setting: hot air penetration is used to heat and dry the water jet nonwoven fabric web;

[0013] S5, winding and falling: the water jet nonwoven fabric after drying is wound and fallen.

[0014] In a preferred embodiment of the present application, in the S1, the anti-static treatment is that distilled water or an anti-static agent is uniformly sprayed in the form of mist points into the fiber in the conveying pipeline.

[0015] In a preferred embodiment of the present application, in the S2, a cylinder machine is used to finely card the fiber raw material, and the cylinder machine comprises a main cylinder, a breast cylinder arranged on the front side of the main cylinder, and a jumble roller arranged on the rear side of the main cylinder; a plurality of stripping rollers and working rollers are sequentially arranged in the clockwise direction around the main cylinder and the breast cylinder;

[0016] The surface of the main cylinder and the breast cylinder is a perforated structure, the outer side is wound with metal card clothing, and the inside is provided with suction devices and blowing devices; the suction devices are arranged towards the stripping rollers, and the blowing devices are arranged towards the upper area of the jumble roller and the cylinder junction;

[0017] The carding process uses the metal card clothing to card the fiber, and the separation speed ratio between the two needle surfaces is: V 胸锡林 :V 工作辊 13-15:1; V 剥取辊 :V 工作辊 1.7-1.9:1; V 主锡林 :V 工作辊 11-13:1.

[0018] In a preferred embodiment of the present application, the parameters of the metal card clothing on different components in the cylinder machine are:

[0019] The main cylinder: the tooth pitch T is 1.12-1.5mm, the base thickness F is 0.8-1.2mm, the total tooth height H is 2.5-5.0mm, and the working angle a is 15-45°;

[0020] The stripping roller arranged in front of the main cylinder: the tooth pitch T is 1.12-1.5mm, the base thickness F is 0.8-1.2mm, the total tooth height H is 2.5-5.0mm, and the working angle a is 45-50°;

[0021] The working roller arranged in front of the main cylinder: the tooth pitch T is 1.12-1.5mm, the base thickness F is 0.8-1.2mm, the total tooth height H is 2.5-5.0mm, and the working angle a is 45-50°;

[0022] The stripping roller arranged behind the main cylinder: the tooth pitch T is 1.12-1.5mm, the base thickness F is 0.8-1.2mm, the total tooth height H is 4.0-5.0mm, and the working angle a is 45-50°;

[0023] The working roller arranged behind the main cylinder: the tooth pitch T is 1.12-1.5mm, the base thickness F is 0.8-1.2mm, the total tooth height H is 4.0-5.0mm, and the working angle a is 45-50°;

[0024] The breast cylinder: the tooth pitch T is 1.5-2.6mm, the base thickness F is 1.2-2.1mm, the total tooth height H is 3.5-5.0mm, and the working angle a is 20-45°;

[0025] The stripping roller arranged outside the breast cylinder: the tooth pitch T is 1.5-2.6mm, the base thickness F is 1.2-2.1mm, the total tooth height H is 3.5-5.0mm, and the working angle a is 20-45°;

[0026] The working roller arranged outside the breast cylinder: the tooth pitch T is 1.5-2.6mm, the base thickness F is 1.2-2.1mm, the total tooth height H is 3.5-5.0mm, and the working angle a is 20-45°.

[0027] In a preferred embodiment of the present application, in the S3, the fiber web is alternately hydroentangled on the front and back surfaces after pre-wetting and webbing, the drum hydroentangling device comprises 2-5 drums, 2-4 hydroentangling heads and a water needle plate are arranged around the drum, the water entangling cloth is wound on the surface of the drum in an S-shaped direction, and the water entangling cloth is wound up and down or left and right, so that the front and back surfaces of the water entangling cloth are hydroentangled on different drums;

[0028] The water needle plate is provided with single-row or multi-row arranged water spraying holes, the hole spacing is 0.6-1.4 mm, and the water spraying hole diameter ranges from 0.1 to 0.12 mm.

[0029] In a preferred embodiment of the present application, the fiber web on the rotating drum is alternately water-jetted on the front and back sides, the pre-wetting water pressure is 30-40 MPa, the water-jetted water pressure for web starting is 30-70 MPa, and the water-jetted water pressure for the rotating drum is 30-130 MPa.

[0030] In a preferred embodiment of the present application, the rotating drum is internally provided with a vacuum dehydration tank, the vacuum dehydration tank is used for fixing the fiber web by negative pressure adsorption and collecting water for water-jet, and the negative pressure of the vacuum dehydration tank is set to 13000-15000 Pa.

[0031] In the S4, a drying device is used to dry the water-jetted non-woven fabric, the drying device comprises a wind box, hot air fans arranged on the upper and lower sides of the wind box, and a mesh belt for conveying the wet non-woven fabric to advance drying; the mesh belt passes through the inside of the wind box along the horizontal direction.

[0032] The super-soft water-jetted non-woven fabric prepared by the preparation method of the super-soft water-jetted non-woven fabric without any additive has a grammage ranging from 30 to 120 g / m 2 , a thickness of 0.3-1.2 mm, a stiffness (length / width) of 21.32 / 4.61-134.05 / 38.36 mg·cm, a breaking strength (length / width) of 27.83 / 32.17-134.68 / 114.97 N, a liquid absorption of more than 900%, and a wear resistance of more than 3 levels.

[0033] The present application solves the problems in the background art and has the following beneficial effects:

[0034] (1) The present application provides a preparation method of super-soft water-jetted non-woven fabric without any additive, which uses low-modulus fibers derived from 100% cotton linters as raw materials, and the fibers are relatively soft; fine denier fibers further improve the softness of the product; no chemical additives such as cream, glycerol, softener, etc. are added in the preparation process, which is healthy and safe, and the process is simple; compared with the prior art, the present application ensures that the water-jetted non-woven fabric has super-soft and high hydrophilic effects, and can be naturally degraded, green and environmentally friendly, the process is simple, and continuous production is easy to realize.

[0035] (2) The present application uses The fiber has low initial modulus and high elongation at break, and the characteristics of high elongation and low modulus make the fiber more easily entangled with each other in the water jet process, which is beneficial to the improvement of the strength of the water jet non-woven fabric and the reduction of the energy consumption of the equipment, and is helpful to energy saving and emission reduction and the reduction of production cost.

[0036] (3) The present application carries out anti-static treatment on the fiber before fiber carding, which avoids the phenomenon that the fiber deviates from the carding direction and is wound again due to static electricity generated in the high-speed carding process, and further improves the fiber carding degree and carding efficiency.

[0037] (4) The present application specially sets the parameters of the tooth pitch, base thickness, total tooth height and working angle of the surface card clothing of each component in the cylinder machine, so that the fine denier fiber raw material can be more fully carded in the production process, and the single fiber state is achieved as much as possible, and the product quality is improved. In addition, this method can effectively solve the problem that the low initial modulus fiber is more difficult to card than the conventional fiber, and the problem of nodules caused by insufficient carding of fine denier fiber, and can effectively improve the basis weight and thickness uniformity of the water jet fabric. By increasing the suction and blowing functions, the carding rate can be improved while ensuring the carding quality.

[0038] (5) The present application improves the water jet device, so that the non-woven fabric can save water needle energy in the water jet process. The cooperation of multiple rotating drums and multiple water jet heads and low water jet pressure can make the front and back surfaces of the water jet fabric be reinforced by multiple water jetting, so that the water jet fabric is more soft and the surface is more smooth under the condition that the entanglement coefficient of the product meets the requirements, and the hand feeling and delicacy of the water jet fabric are improved; at the same time, the strength and wear resistance of the product can be ensured, and the product is not easy to generate fuzz and pilling. In addition, the high-power vacuum suction device solves the problem of low porosity of the high basis weight fine denier fiber web and difficult suction. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor;

[0040] Figure 1 is a preparation method flow chart of the preferred embodiment of the present application;

[0041] Figure 2 is a structure diagram of the anti-static treatment device of the preferred embodiment of the present application;

[0042] Figure 3 is a position schematic diagram of the suction and blowing device of the working unit of the cylinder machine of the preferred embodiment of the present application; ​

[0043] Figure 4 Figure 1 is a schematic diagram of a position of a jumble roller blow-off device of a preferred embodiment of the present application;

[0044] Figure 5 Figure 2 is a schematic diagram of a metal card of a preferred embodiment of the present application;

[0045] Figure 6 Figure 3 is a fiber electron microscope image of a preferred embodiment of the present application; DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0047] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than those described herein, and therefore the scope of the application is not limited to the details of the embodiments described herein.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0049] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] As shown in Figure 1 The present application provides a preparation method of an added-free super-soft spunlace fabric, comprising the following steps:

[0051] S1, opening and cleaning: the ​The fibers are subjected to preliminary opening and dedusting and anti-static treatment as raw materials. The fibers are derived from 100% cotton linters, have a crystallinity of 40.0-50.0%, a fiber linear density of 0.5-2D, an initial modulus of 15-31 cN / dtex, and a breaking elongation of 20.3-62.0%.

[0052] S2, carding and laying: the fiber raw materials are finely carded using a modified carding machine, the surface of the main cylinder and the breast cylinder is a perforated structure, and suction and blowing devices are arranged therein; the diameter of the breast cylinder is less than or equal to the diameter of the main cylinder, wherein the wire density of the working unit of the main cylinder is greater than the wire density of the working unit of the breast cylinder.

[0053] S3, water jet reinforcement: through repeated water jetting of multiple drums and multiple water jet heads at low water jet pressure, a high-power vacuum suction device is used, and the longitudinal / transverse breaking strength ratio of the obtained fiber web is greater than or equal to 1:1.

[0054] S4, drying and setting: hot air penetration is used to heat and dry the water jet fabric web; a drying device is used to dry the water jet nonwoven fabric, and the drying device comprises: an air bellow, hot air blowers arranged on the upper and lower sides of the air bellow, and a mesh belt for conveying the wet nonwoven fabric to advance drying; the mesh belt passes through the inside of the air bellow along the horizontal direction; hot air is conveyed from the upper and lower sides of the mesh belt, the air volume value of the hot air is 20-100%, the conveying speed of the mesh belt is 10-85 m / min, and the drying temperature is 100-165°C.

[0055] S5, winding and cloth falling: the water jet nonwoven fabric after drying is wound and cloth falling.

[0056] It is worth noting that in step S1, The preparation process of the fibers is as follows: cotton linters are prepared into cotton pulp, and then are spun again by viscose, modal or lyocell spinning method to prepare the fibers.

[0057] Viscose process The scanning electron microscope image of the fibers is shown in Figure 6 As shown in a, the cross-sectional electron microscope image, it can be seen that the fiber cross-section is sawtooth-shaped, and b is the longitudinal structure electron microscope image, it can be seen that the fiber surface has obvious grooves. The fibers themselves have high water absorption performance and good hand feeling.

[0058] As shown in Figure 2 , in S1, the anti-static treatment is that distilled water or anti-static agent is uniformly sprayed in the form of mist points into the fibers using a plurality of spraying devices in the conveying pipeline.

[0059] As shown in Figure 3 , Figure 4 and Figure 5As shown, in S2, the fiber raw material is finely combed using a cylinder machine, which includes a main cylinder, a breast cylinder arranged in front of the main cylinder, and a jumble roller arranged behind the main cylinder; a plurality of stripping rollers and working rollers are sequentially arranged in a clockwise direction around the main cylinder and the breast cylinder; the surfaces of the main cylinder and the breast cylinder are of a pinhole structure, the outer side is wound with metal clothing, and the inner side is provided with suction devices and blowing devices; the suction devices are arranged towards the stripping rollers, and the blowing devices are arranged towards the upper region of the jumble roller and the cylinder; the metal clothing is used for combing the fibers in the combing process, and the separation speed ratio between the two needle surfaces is: Vbreast cylinder:Vworking roller is 13-15:1; Vstripping roller:Vworking roller is 1.7-1.9:1; Vmain cylinder:Vworking roller is 11-13:1.

[0060] The breast cylinder cooperates with the plurality of stripping rollers and working rollers to preliminarily comb the fiber bundle; the main cylinder cooperates with the plurality of stripping rollers and working rollers to further comb the fibers, and gradually combs the fiber bundle into single fibers. The diameter of the breast cylinder is less than or equal to the diameter of the main cylinder, and the needle density of the working unit of the main cylinder is greater than that of the breast cylinder, so that the single fibers can be fully and efficiently combed, and the problems of neps and uneven fabric caused by insufficient combing can be solved.

[0061] The jumble mechanism is that the airflow generated by the blowing devices in the cylinder makes the fibers on the surface of the cylinder float up, and the airflow between the jumble roller and the cylinder boundary layer causes turbulence in the triangular region, so that the fibers are more easily curled and mixed; the suction devices arranged in the main cylinder and the breast cylinder can adsorb and fix the fiber web to a certain extent, so that the fibers can be combed; and the blowing devices can blow away the fibers adhered to the needle teeth, so that the fibers can be jumbled and stripped.

[0062] In this embodiment, the parameters of the metal clothing on different components in the cylinder machine are as follows:

[0063] The main cylinder: the pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 2.5-5.0 mm, and the working angle a is 15°-45°;

[0064] The stripping roller arranged in front of the main cylinder: the pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 2.5-5.0 mm, and the working angle a is 45°-50°;

[0065] The working roller arranged in front of the main cylinder: the pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 2.5-5.0 mm, and the working angle a is 45°-50°;

[0066] The stripping roller arranged behind the main cylinder has a tooth pitch T of 1.12-1.5 mm, a base thickness F of 0.8-1.2 mm, a total tooth height H of 4.0-5.0 mm, and a working angle a of 45-50°;

[0067] The working roller arranged behind the main cylinder has a tooth pitch T of 1.12-1.5 mm, a base thickness F of 0.8-1.2 mm, a total tooth height H of 4.0-5.0 mm, and a working angle a of 45-50°;

[0068] The breast cylinder has a tooth pitch T of 1.5-2.6 mm, a base thickness F of 1.2-2.1 mm, a total tooth height H of 3.5-5.0 mm, and a working angle a of 20-45°;

[0069] The stripping roller arranged outside the breast cylinder has a tooth pitch T of 1.5-2.6 mm, a base thickness F of 1.2-2.1 mm, a total tooth height H of 3.5-5.0 mm, and a working angle a of 20-45°;

[0070] The working roller arranged outside the breast cylinder has a tooth pitch T of 1.5-2.6 mm, a base thickness F of 1.2-2.1 mm, a total tooth height H of 3.5-5.0 mm, and a working angle a of 20-45°.

[0071] The present application can make the fine denier fiber material be more fully carded in the production process, and the single fiber state is achieved as much as possible, and the product quality is improved.

[0072] In step S3, the fiber web is alternately water-jetted on the front and back surfaces after pre-wetting and webbing using a rotary drum water-jet device, the rotary drum water-jet device comprises 2-5 rotary drums, 2-4 water-jet heads and water needle plates arranged around the rotary drums; the water-jet fabric is wound on the surface of the rotary drum in an S-shaped up-down and left-right manner, so that the front and back surfaces of the water-jet fabric are water-jetted by different rotary drums; the water needle plate is provided with a plurality of water spray holes arranged in a single row or multiple rows, the hole spacing is 0.6-1.4 mm, and the water spray hole diameter ranges from 0.1 mm to 0.12 mm; the front and back surfaces of the fiber web on the rotary drum are alternately water-jetted, the pre-wetting water pressure is 30-40 MPa, the webbing water-jet pressure is 30-70 MPa, and the rotary drum water-jet pressure is 30-130 MPa. A vacuum dehydration tank is arranged in the rotary drum, which is used for adsorbing and fixing the fiber web and collecting the water for water-jet, and the negative pressure of the vacuum dehydration tank is set to 13000-15000 Pa.

[0073] The gap between the water needle plate and the rotating drum allows the non-woven fabric to pass through, so that the non-woven fabric can be well fixed on the rotating drum by the impact force of the water needle and the support of the water needle plate during the water jetting process, so that the fiber web can be more easily penetrated by the water needle and have strength, and a high-power vacuum dewatering tank is arranged in the rotating drum, which can better absorb and fix the fiber web through negative pressure suction and collect and recycle the water for water jetting, thereby saving energy and reducing emissions; the fine fiber web has a large density, which increases the difficulty of suction, and the high-power vacuum suction dewatering device can solve the above problems.

[0074] It is worth noting that the lower the water jetting pressure, the softer the water jetted fabric; but low water jetting pressure can cause the strength of the fabric to decrease and the fabric to be prone to pilling, and the multiple rotating drums and water jetting heads can repeatedly water jet the front and back of the water jetted fabric to effectively improve the above problems.

[0075] The super-soft water jetted non-woven fabric prepared by the above method has a grammage of 30-120 g / m 2 , a thickness of 0.3-1.2 mm, a stiffness (length / width) of 21.32 / 4.61-134.05 / 38.36 mg·cm, a breaking strength (length / width) of 27.83 / 32.17-134.68 / 114.97 N, a liquid absorption of more than 900%, and a wear resistance of more than 3 levels.

[0076] The liquid absorption and stiffness of the non-woven fabric were tested according to GB / T 24218 "Textile Nonwoven Fabric Test Method" and GB / T 18318 "Determination of Flexibility of Textiles", respectively. The performance data of the non-woven fabric are shown in Table 1, and the softness and water absorption of several materials of different specifications such as ordinary cotton, cream cotton and The comparison shows that the liquid absorption of the water jetted fabric is better than that of ordinary cotton and cream cotton, and the liquid absorption decreases with the increase of the grammage, because the thinner and lighter water jetted fabric can absorb water more easily, and the thicker and heavier water jetted fabric needs more time to absorb water; The stiffness of the water jetted fabric is lower than that of the cotton water jetted fabric of the same specification, because The high elongation and low modulus of the fiber give the water jetted fabric excellent softness. In addition, The water jetted fabric has better mechanical properties than the cotton water jetted fabric.

[0077] Table 1. Performance data

[0078]

[0079] Example 1

[0080] ​​1. Opening: the fiber with crystallinity of 40.0%, fiber linear density of 1.1D, initial modulus of 24 cN / dtex, and elongation at break of 27.4% is opened and dedusted as raw material, and distilled water is sprayed on the fiber in mist points uniformly by using a conveying pipeline with a spraying device for anti-static treatment. The fiber is opened and dedusted as raw material, and distilled water is sprayed on the fiber in mist points uniformly by using a conveying pipeline with a spraying device for anti-static treatment.

[0081] 2. Carding: the opened raw material is carded by using the cylinder machine of the application; during the carding process, the carding speed ratio between the two needle surfaces is: V 胸锡林 :V 工作辊 is 13:1; V 剥取辊 :V 工作辊 is 1.7:1; V 主锡林 :V 工作辊 is 11:1, and the parameters of the metal card clothing on different components are:

[0082] Pitch T Base thickness F Total tooth height H Working angle a Main cylinder 1.12 mm 0.8 mm 2.5 mm 15° Front stripping roller of main cylinder 1.5 mm 1.2 mm 5.0 mm 45° Front working roller of main cylinder 1.5 mm 0.9 mm 5.0 mm 45° Rear stripping roller of main cylinder 1.5 mm 1.2 mm 4.0 mm 45° Rear working roller of main cylinder 1.5 mm 1.0 mm 5.0 mm 50° Chest cylinder 1.6 mm 1.2 mm 3.5 mm 20° Chest stripping roller 2.6 mm 2.1 mm 5.0 mm 20° Chest working roller 1.5 mm 1.2 mm 5.0 mm 20°

[0083] Table 2. Metal card clothing parameters of Example 1

[0084] The obtained fiber web has a longitudinal / transverse breaking strength ratio of 3:1, and the carded fiber web is cross-laid.

[0085] 3. Hydroentanglement: the fiber web after pre-wetting and webbing is subjected to hydroentanglement on the front and back surfaces alternately by using the hydroentanglement device with three drums in the application, the fiber web is S-wound on the hydroentanglement drums, the pre-wetting water pressure is 35 MPa, the webbing hydroentanglement pressure is 70 MPa, the hydroentanglement pressures on the three drums are: drum 1: 50 MPa, 60 MPa; drum 2: 60 MPa, 80 MPa; drum 3: 100 MPa, 115 MPa. A water spraying plate with single-row arrangement of water spraying holes is used, the hole spacing is 0.6 mm, the water spraying hole diameter is 0.1 mm, and the negative pressure of the vacuum dehydration tank is set to 13000 Pa.

[0086] 4. Drying and setting: the hydroentangled fabric is subjected to hot drying and drying by using a drying device, the wet non-woven fabric is conveyed forward by a mesh belt, hot air is conveyed from the upper and lower sides of the mesh belt, the air volume value of the hot air is 100%, the mesh belt conveying speed is 10 m / min, and the drying temperature is 165℃.

[0087] 5. Winding and cloth falling: the dried hydroentangled non-woven fabric is wound and cloth falling. The obtained new type of super-soft cotton source hydroentangled non-woven fabric has a grammage of 120 g / m 2 , a thickness of 1.2 mm, a stiffness (longitudinal / transverse) of 134.05 / 38.36 mg·cm, a breaking strength (longitudinal / transverse) of 77.53 / 52.17 N, and a liquid absorption of 1216%.

[0088] Example Two

[0089] 1. Opening: The fibers with a crystallinity of 45.0%, a fiber linear density of 0.5D, an initial modulus of 15 cN / dtex, and an elongation at break of 62.0% are used as raw materials for preliminary opening and dust removal, and an antistatic agent is uniformly sprayed on the fibers in the form of mist points using a conveying pipeline with a spraying device for antistatic treatment.

[0090] 2. Carding: The opened raw materials are carded using the cylinder machine of the present application; during the carding process, the carding speed ratio between the two needle surfaces is: V 胸锡林 :V 工作辊 is 15:1; V 剥取辊 :V 工作辊 is 1.9:1; V 主锡林 :V 工作辊 is 13:1, and the parameters of the metal card clothing on different components are:

[0091] Pitch T Base thickness F Total tooth height H Working angle a Main cylinder 1.5 mm 1.2 mm 5 mm 45° Front stripping roller of main cylinder 1.5 mm 1.2 mm 5.0 mm 50° Front working roller of main cylinder 1.5 mm 1.2 mm 5.0 mm 50° Rear stripping roller of main cylinder 1.5 mm 1.2 mm 5.0 mm 50° Rear working roller of main cylinder 1.5 mm 1.2 mm 5.0 mm 50° Chest cylinder 2.6 mm 2.1 mm 5.0 mm 45° Chest stripping roller 2.6 mm 2.1 mm 5.0 mm 45° Chest working roller 2.6 mm 2.1 mm 5.0 mm 45°

[0092] Table 3. Metal card clothing parameters of Example Two

[0093] The obtained web has a longitudinal / transverse breaking strength ratio of 2:1, and the carded fiber web is laid in parallel.

[0094] 3. Hydroentanglement: The fiber web after pre-wetting and webbing is subjected to hydroentanglement on the front and back surfaces alternately using the hydroentanglement device with two drums in the present application, and the fiber web is S-shaped wound on the hydroentanglement drums, the pre-wetting water pressure is 30 MPa, the webbing hydroentanglement pressure is 30 MPa, the hydroentanglement pressures on the two drums are: drum 1: 55 MPa, 66 MPa; drum 2: 75 MPa, 75 MPa. A water spraying plate with double-row arrangement of water spraying holes is used, the hole spacing is 1.4 mm, the water spraying hole diameter is 0.12 mm, and the negative pressure of the vacuum dewatering box is set to 15000 Pa.

[0095] 4. Drying and setting: The hydroentangled fabric is subjected to heat drying and drying using a drying device, and the wet nonwoven fabric is conveyed forward for drying by a mesh belt, hot air is conveyed from the upper and lower sides of the mesh belt, the air volume value of the hot air is 20%, the mesh belt conveying speed is 85 m / min, and the drying temperature is 100°C.

[0096] 5. Winding and cloth falling: the hydroentangled nonwoven fabric after drying is wound and dropped. The obtained new type of super-soft cotton source hydroentangled nonwoven fabric has a grammage of 30 g / m 2 , a thickness of 0.3 mm, a stiffness (longitudinal / transverse) of 21.32 / 4.61 mg·cm, a breaking strength (longitudinal / transverse) of 82.68 / 64.97 N, and a liquid absorption of 1050%.

[0097] Example Three ​

[0098] 1. Opening: the raw material of 48.4% crystallinity, 2D fiber linear density, 31 cN / dtex initial modulus, 20.3% elongation at break is opened and dedusted, and distilled water is sprayed on the fibers in mist points by using a conveying pipeline with a spraying device for anti-static treatment.

[0099] 2. Carding: the opened raw material is carded by using the cylinder machine of the application; the carding speed ratio between the two needle surfaces is: V 胸锡林 :V 工作辊 is 14:1; V 剥取辊 :V 工作辊 is 1.8:1; V 主锡林 :V 工作辊 is 12:1, and the parameters of the metal card clothing on different components are:

[0100] Pitch T Base thickness F Total tooth height H Working angle a Main cylinder 1.3 mm 0.9 mm 2.5 mm 15° Front stripping roller of main cylinder 1.6 mm 1.2 mm 5.0 mm 40° Front working roller of main cylinder 1.3 mm 0.9 mm 5.0 mm 40° Rear stripping roller of main cylinder 1.5 mm 1.2 mm 4.0 mm 50° Rear working roller of main cylinder 1.5 mm 1.0 mm 5.0 mm 50° Chest cylinder 2.6 mm 1.2 mm 3.5 mm 25° Chest stripping roller 2.6 mm 2.1 mm 5.0 mm 25° Chest working roller 2.6 mm 1.2 mm 5.0 mm 25°

[0101] Table 4. Metal card clothing parameters of Example Three

[0102] The obtained web has a longitudinal / transverse breaking strength ratio of 2.5:1, and the carded fiber web is cross-laid.

[0103] 3. Hydroentanglement: the pre-wetted and webbed fiber web is subjected to hydroentanglement on the front and back surfaces alternately by using the hydroentanglement device with 5 drums in the application, the fiber web is S-wound on the hydroentanglement drums, the pre-wetting water pressure is 40 MPa, the webbing hydroentanglement pressure is 70 MPa, the hydroentanglement pressures on the 5 drums are: drum 1: 80 MPa; drum 2: 80 MPa, 90 MPa; drum 3: 90 MPa, 110 MPa, 120 MPa; drum 4: 120 MPa, 120 MPa; drum 5: 130 MPa, 120 MPa, 120 MPa, 100 MPa. A water spraying plate with single-row arrangement of water spraying holes is used, the hole spacing is 0.6 mm, the water spraying hole diameter is 0.1 mm, and the negative pressure of the vacuum dehydration tank is set to 13000 Pa.

[0104] 4. Drying and setting: the hydroentangled fabric is subjected to heat drying and drying by using a drying device, the wet nonwoven fabric is conveyed forward by a mesh belt, hot air is conveyed from the upper and lower sides of the mesh belt, the air volume value of the hot air is 80%, the mesh belt conveying speed is 65 m / min, and the drying temperature is 145℃.

[0105] 5. Winding and cloth falling: the dried hydroentangled nonwoven fabric is wound and cloth falling. The obtained new type of super-soft cotton source hydroentangled nonwoven fabric has a grammage of 50 g / m 2 ​, thickness 0.7 mm, stiffness (length / width) 54.02 / 17.61 mg.cm, breaking strength (length / width) 91.42 / 83.61, liquid absorption 1131%.

[0106] Comparative Example 1

[0107] 1. Opening: cotton fibers having a crystallinity of 68.7%, a fiber linear density of 0.9D, an initial modulus of 82 cN / dtex, and an elongation at break of 6.2% were used as raw material for initial opening and dust removal, and distilled water was uniformly sprayed in mist points on the fibers using a transfer duct with a spraying device for anti-static treatment.

[0108] 2. Carding: the opened raw material was carded using the cylinder machine of the present application; during carding, the carding speed ratio between the two needle surfaces was V 胸锡林 :V 工作辊 = 15:1; V 剥取辊 :V 工作辊 = 1.9:1; V 主锡林 :V 工作辊 = 13:1, and the parameters of the metal card clothing on different parts were as follows:

[0109] Pitch T Base thickness F Total tooth height H Working angle a Main cylinder 1.12 mm 0.8 mm 2.5 mm 15° Front stripping roller of main cylinder 1.5 mm 1.2 mm 5.0 mm 45° Front working roller of main cylinder 1.5 mm 0.9 mm 5.0 mm 45° Rear stripping roller of main cylinder 1.5 mm 1.2 mm 4.0 mm 45° Rear working roller of main cylinder 1.5 mm 1.0 mm 5.0 mm 50° Chest cylinder 1.6 mm 1.2 mm 3.5 mm 20° Chest stripping roller 2.6 mm 2.1 mm 5.0 mm 20° Chest working roller 1.5 mm 1.2 mm 5.0 mm 20°

[0110] Table 5. Metal card clothing parameters of Comparative Example 1

[0111] The length / width breaking strength ratio of the obtained web was 2:1, and the carded fiber web was cross-laid.

[0112] 3. Hydroentanglement: the fiber web after pre-wetting and web formation was subjected to hydroentanglement on the front and back surfaces alternately using the hydroentanglement device with 3 drums in the present application, the fiber web was S-wound on the hydroentanglement drums, the pre-wetting water pressure was 80 MPa, the web formation hydroentanglement pressure was 90 MPa, the hydroentanglement pressures on the 2 drums were as follows: drum 1: 130 MPa, 120 MPa; drum 2: 130 MPa, 120 MPa. A water spraying plate with double-row arrangement of water spraying holes was used, the hole spacing was 1.4 mm, the water spraying hole diameter was 0.12 mm, and the negative pressure of the vacuum dehydration tank was set to 13000 Pa.

[0113] 4. Drying and setting: the hydroentangled fabric was subjected to hot drying and drying using a drying device, the wet nonwoven fabric was conveyed forward for drying by a mesh belt, hot air was conveyed from the upper and lower sides of the mesh belt, the air volume value of the hot air was 90%, the mesh belt conveying speed was 65 m / min, and the drying temperature was 125°C.

[0114] 5. Winding and cloth falling: the dried hydroentangled nonwoven fabric was wound and dropped. The obtained new type of super-soft cotton source hydroentangled nonwoven fabric had a basis weight of 50 g / m 2, thickness 0.7 mm, stiffness (length / width) 268.9 / 18.71 mg.cm, breaking strength (length / width) 57.13 / 22.46 N, liquid absorption 770%.

[0115] Comparative Example 2

[0116] 1. Opening: cotton fibers having a crystallinity of 68.7%, a fiber linear density of 0.9D, an initial modulus of 82 cN / dtex, and an elongation at break of 6.2% were used as raw material for initial opening and dust removal, and distilled water was uniformly sprayed in mist points on the fibers using a transfer duct with a spraying device for anti-static treatment.

[0117] 2. Carding: the opened raw material was carded using a common cylinder machine without suction and blow-off device; during carding, the ratio of the separating speeds between the two needle surfaces was V 胸锡林 :V 工作辊 = 15:1; V 剥取辊 :V 工作辊 = 1.9:1; V 主锡林 :V 工作辊 = 13:1, and the parameters of the metal card clothing on different parts were as follows:

[0118] Pitch T Base thickness F Total tooth height H Working angle a Main cylinder 2.12 mm 0.8 mm 2.5 mm 10° Front stripping roller of main cylinder 2.5 mm 1.2 mm 5.0 mm 40° Front working roller of main cylinder 2.5 mm 0.9 mm 5.0 mm 40° Rear stripping roller of main cylinder 2.5 mm 1.2 mm 4.0 mm 40° Rear working roller of main cylinder 2.5 mm 1.0 mm 5.0 mm 45° Chest cylinder 2.6 mm 1.2 mm 3.5 mm 15° Chest stripping roller 3.6 mm 2.1 mm 5.0 mm 15° Chest working roller 2.5 mm 1.2 mm 5.0 mm 15°

[0119] Table 6. Metal card clothing parameters of Comparative Example 2

[0120] The length / width breaking strength ratio of the obtained web was 6:1, and the carded fiber web was cross-laid.

[0121] 3. Hydroentanglement: the pre-wetted and web-formed fiber web was subjected to hydroentanglement on the front and back surfaces alternately using a conventional hydroentanglement device, the pre-wetting water pressure was 75 MPa, the web-forming hydroentanglement pressure was 125 MPa, and the hydroentanglement pressures on the two drums were as follows: drum 1: 110 MPa, 120 MPa; drum 2: 130 MPa, 120 MPa. A water spraying plate with double-row arrangement of water spraying holes was used, the hole spacing was 1.4 mm, and the water spraying hole diameter was 0.12 mm.

[0122] 4. Drying and setting: the hydroentangled fabric was subjected to heat drying and drying using a drying device, the wet nonwoven fabric was conveyed forward by a mesh belt, hot air was conveyed from the upper and lower sides of the mesh belt, the air volume value of the hot air was 90%, the mesh belt conveying speed was 65 m / min, and the drying temperature was 125°C.

[0123] 5. Winding and cloth falling: the dried hydroentangled nonwoven fabric was wound and dropped. The obtained new type of super-soft cotton source hydroentangled nonwoven fabric had a basis weight of 50 g / m 2, thickness 0.9mm, stiffness (length / width) 277.46 / 19.54mg.cm, breaking strength (length / width) 66.57 / 28.94N, liquid absorption 798%.

[0124] Compared with the above-mentioned embodiment one, embodiment two, embodiment three, comparative example one and comparative example two, different non-woven fabric samples are prepared by using cotton fibers, different preparation devices and preparation parameters, and the spunlace non-woven fabric prepared by the application has lower bending stiffness and better liquid absorption, that is, better softness and water absorption.

[0125] According to the ideal embodiments of the application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A method for preparing an ultra-soft water-jet fabric without additives, characterized by, The method comprises the following steps: S1, opening and cleaning: Minsale fibers are used as raw materials for preliminary opening and dust removal, and anti-static treatment is performed; the Minsale fibers are derived from 100% cotton linters, the crystallinity is 40.0-50.0%, the fiber linear density is 0.5-2D, the initial modulus is 15-31 cN / dtex, and the elongation at break is 20.3-62.0%; S2, carding and laying: the fiber raw materials are finely carded using an improved carding machine, the improved carding machine comprises a main cylinder, a breast cylinder arranged on the front side of the main cylinder, a chaotic roller arranged on the back side of the main cylinder, and a plurality of groups of stripping rollers and working rollers arranged in the clockwise direction around the main cylinder and the breast cylinder in sequence; the surfaces of the main cylinder and the breast cylinder are injection hole structures, the outer sides are wound with metal clothing, and the inner sides are provided with suction devices and blowing devices; wherein the suction devices are arranged towards the stripping rollers, and the blowing devices are arranged towards the upper regions of the junctions of the chaotic roller and the cylinder; The breast licker diameter is less than or equal to the main licker diameter, and the main licker working unit wire density is greater than the breast licker working unit wire density; the carding process uses the metal wire to card the fibers, and the speed ratio between the two needle surfaces is: V 胸锡林 : V 工作辊 is 13-15:1; V 剥取辊 : V 工作辊 is 1.7-1.9:1; V 主锡林 : V 工作辊 is 11-13:1; The parameters of the metal clothing on different components in the improved carding machine are as follows: The main cylinder: the tooth pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 2.5-5.0 mm, and the working angle a is 15°-45°; The stripping roller arranged in front of the main cylinder: the tooth pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 2.5-5.0 mm, and the working angle a is 45°-50°; The working roller arranged in front of the main cylinder: the tooth pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 2.5-5.0 mm, and the working angle a is 45°-50°; The stripping roller arranged behind the main cylinder: the tooth pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 4.0-5.0 mm, and the working angle a is 45°-50°; The working roller arranged behind the main cylinder: the tooth pitch T is 1.12-1.5 mm, the base thickness F is 0.8-1.2 mm, the total tooth height H is 4.0-5.0 mm, and the working angle a is 45°-50°; The breast cylinder: the tooth pitch T is 1.5-2.6 mm, the base thickness F is 1.2-2.1 mm, the total tooth height H is 3.5-5.0 mm, and the working angle a is 20°-45°; The stripping roller arranged on the outer side of the breast cylinder: the tooth pitch T is 1.5-2.6 mm, the base thickness F is 1.2-2.1 mm, the total tooth height H is 3.5-5.0 mm, and the working angle a is 20°-45°; The working roller arranged on the outer side of the breast cylinder: the tooth pitch T is 1.5-2.6 mm, the base thickness F is 1.2-2.1 mm, the total tooth height H is 3.5-5.0 mm, and the working angle a is 20°-45°; S3, water jet reinforcement: repeated water jet is performed through a multi-roller multi-water jet head low water jet pressure, a high-power vacuum suction device is used, and the longitudinal / transverse breaking strength ratio of the obtained fiber web is greater than or equal to 1:1; S4, drying and setting: using hot air penetration to heat and dry the spunlace fabric web; S5, winding and dropping: winding and dropping the dried spunlace nonwoven fabric.

2. A process for the preparation of an ultra-soft spunlace fabric without addition as claimed in claim 1, wherein: In the S1, the anti-static treatment is to spray distilled water or anti-static agent in the form of mist points to the fibers uniformly in the conveying pipeline.

3. A process for the preparation of an ultra-soft spunlace fabric without addition as claimed in claim 1, wherein: In the S3, the pre-wetting and webbing are followed by using a drum-type spunlace device to alternately perform water jet on the front and back surfaces of the fiber web, the device includes 2-5 drums, 2-4 spunlace heads and water needle plates are arranged around the drums; the spunlace fabric is wound on the surface of the drum in an S-shaped direction, up and down or left and right, so that the front and back surfaces of the spunlace fabric are reinforced by water jet on different drums. The water needle plate is provided with a plurality of water spray holes arranged in a single row or multiple rows, the hole spacing is 0.6-1.4 mm, and the hole diameter of the water spray hole is 0.1-0.12 mm.

4. A process for the preparation of an ultra-soft spun-laced fabric without addition as claimed in claim 3, wherein: The front and back surfaces of the fiber web on the drum are alternately jetted, the pre-wetting water pressure is 30-40 MPa, the webbing water jet pressure is 30-70 MPa, and the drum water jet pressure is 30-130 MPa.

5. A process for the preparation of an ultra-soft spun-laced fabric without addition as claimed in claim 3, wherein: The inside of the drum is provided with a vacuum dehydration tank, the vacuum dehydration tank is used to fix the fiber web by negative pressure adsorption and to collect water for water jet, and the negative pressure of the vacuum dehydration tank is set to 13000-15000 Pa.

6. A process for the preparation of an ultra-soft spunlace fabric without addition as claimed in claim 1, wherein: In the S4, a drying device is used to dry the spunlace nonwoven fabric, the drying device includes: a wind box, hot air fans arranged on the upper and lower sides of the wind box, and a web belt for conveying the wet nonwoven fabric to advance drying; the web belt passes through the inside of the wind box along the horizontal direction.

7. The super-soft spunlace nonwoven fabric prepared based on the method of any one of claims 1-6, characterized in that: The super-soft spunlace nonwoven fabric has a weight of 30-120 g / m 2 , a thickness of 0.3-1.2 mm, a stiffness (length / width) of 21.32 / 4.61-134.05 / 38.36 mg·cm, a breaking strength (length / width) of 27.83 / 32.17-134.68 / 114.97 N, a liquid absorption of more than 900%, and a wear resistance of more than 3.

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