CN112575445A - Preparation method and application of composite non-woven fabric - Google Patents

Preparation method and application of composite non-woven fabric Download PDF

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Publication number
CN112575445A
CN112575445A CN202011403194.1A CN202011403194A CN112575445A CN 112575445 A CN112575445 A CN 112575445A CN 202011403194 A CN202011403194 A CN 202011403194A CN 112575445 A CN112575445 A CN 112575445A
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China
Prior art keywords
fiber
cotton
hemp
silk
fibers
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CN202011403194.1A
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Chinese (zh)
Inventor
黄玉琴
刘少峰
邱永龙
徐多乐
刘凯华
颜肖辉
裴新梅
李伏君
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Zhuzhou Qianjin Pharmaceutical Co Ltd
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Zhuzhou Qianjin Pharmaceutical Co Ltd
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Publication of CN112575445A publication Critical patent/CN112575445A/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4266—Natural fibres not provided for in group D04H1/425
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs

Abstract

The invention discloses a preparation method and application of a silk fiber-hemp fiber-cotton fiber composite non-woven fabric. This non-woven materials has combined silk, china-hemp and cotton fiber three's advantage, has avoided the shortcoming: the silk fiber layer contacts the skin, and the longitudinally arranged fibers are easy to longitudinally diffuse menses and are not easy to leak laterally; the hemp-cotton fiber layer contacts the diversion layer of the sanitary towel, so that the antibacterial property of the non-woven fabric is ensured, the using amount of hemp fiber is reduced, and discomfort caused by contact of thicker hemp fiber with skin is avoided; after the sanitary towel is manufactured, the sanitary towel is used as a surface layer, and the structure is easy to permeate menstrual blood downwards and diffuse around, so that the problem of side leakage of the menstrual blood is solved, and the safety and the dryness of the sanitary towel are enhanced.

Description

Preparation method and application of composite non-woven fabric
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a preparation method and application of a composite non-woven fabric.
Background
The non-woven fabric is widely applied to medical products and sanitary products. The non-woven fabrics used in the sanitary products are hot air non-woven fabrics, spun-bonded non-woven fabrics, hot rolled non-woven fabrics and pure cotton non-woven fabrics. The linear density of the cotton fibers is 1.54-2.5 dtex, and after degreasing and bleaching, the spunlace fabric prepared by the method has the texture inferior to that of silk spunlace fabric, the spunlace fabric made of all-cotton materials can be used on the surface of a sanitary towel, the wear resistance is good, the combination between fibers is loose and thick, the water absorption is good, and the spunlace fabric is applied to a surface layer of the sanitary towel, has rapid absorption of menstrual blood, is wet after use, is not dry and comfortable, and is not soft and comfortable enough.
The China-hemp fiber has good natural antibacterial property and good moisture absorption and desorption property, the linear density of the fiber is 1.8-3.15 dtex, and after the China-hemp fiber is made into the spunlace non-woven fabric, the non-woven fabric has good antibacterial property and dry and comfortable property, but the comfort is poor.
The silk is continuous long fiber formed by coagulating silk liquid secreted by a mature silkworm during cocooning, is also called natural silk, is also a natural fiber, and is rich in 18 amino acids beneficial to human bodies. The silk is the lightest, the softest and the thinnest natural fiber in nature, can be easily recovered to the original shape after external force is removed, and the inner tube does not cake, is not stuffy, does not shrink together, is uniform and soft, and can be permanently used without turning over.
The fiber linear density of the silk fiber is 0.9-1.6 dtex, the fibers are tightly combined, the water absorption is poor after the spun-laced non-woven fabric is prepared, although the texture is soft and comfortable, the menstrual blood infiltration speed is low when the spun-laced non-woven fabric is applied to a surface layer of a sanitary towel, and the side leakage is easily caused. Meanwhile, silk and hemp fiber are easy to generate static electricity, and the hemp fiber is thicker and harder than cotton fiber, so that the problems of static electricity of the fiber and comfort of the final non-woven fabric need to be solved in the production process.
At present, the technology of preparing the non-woven fabric by mixing the silk fiber, the hemp fiber and the cotton fiber in the market is immature, and the composite non-woven fabric prepared from the silk fiber, the hemp fiber and the cotton fiber is not applied to the surface layer of the sanitary product in the market. CN201811577137.8 discloses a sanitary towel containing hemp fiber and a preparation method thereof, the sanitary towel comprises a surface layer, an absorption layer and a bottom layer from top to bottom in sequence, the surface layer and the absorption layer are both made of hemp fiber and chitin fiber by mixing, and mulberry silk fiber, cotton fiber and modified corn straw fiber can also be added into the absorption layer. But it does not use a mixture of silk fibers, hemp fibers and cotton fibers to prepare a non-woven fabric for the facing layer, and the requirements for the facing layer and the absorbent layer are different for sanitary napkin-related products.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method and application of a silk fiber-hemp fiber-cotton fiber composite non-woven fabric.
A first object of the present invention is to provide a composite nonwoven fabric.
The second purpose of the invention is to provide a preparation method of the composite non-woven fabric.
The third purpose of the invention is to provide the composite non-woven fabric prepared by the preparation method.
The fourth purpose of the invention is to provide the application of the composite non-woven fabric in the preparation of disposable sanitary products.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides a non-woven fabric consisting of a silk fiber net layer and a hemp-cotton fiber net layer, which adopts a half-crossing parallel lapping technology, wherein a silk layer is directly paved, the hemp-cotton fiber layer is fully crossed, the hemp-cotton fiber net layer is a fiber net prepared by mixing hemp fibers and cotton fibers in a certain proportion, and the specific preparation flow is shown in figure 1.
Therefore, the invention claims a composite non-woven fabric, which is prepared by laying a silk fiber net layer and a hemp-cotton fiber net layer through a spunlace process, wherein the silk layer is obtained by directly laying and laying the silk layer, the hemp-cotton fiber net layer is obtained by fully cross laying, and the hemp-cotton fiber net layer is a fiber net layer prepared by mixing hemp fibers and cotton fibers.
Preferably, the gram weight of the silk fiber net layer is 12 +/-2 g/m, the lapping layer is 2 layers, and the lapping layer is 4 layers of China hemp-cotton fiber net layer2The gram weight of the hemp-cotton fiber net layer is 22 +/-2 g/m2。
Preferably, the mass ratio of the hemp fiber to the cotton fiber is 0.3-0.8: 1.
more preferably, the mass ratio of the hemp fiber to the cotton fiber is 0.5: 1.
the semi-cross technology is a straight forming technology after the straight paving technology and the full-cross technology are combined, the conventional semi-cross technology integrates the advantages of the straight paving technology and the full-cross lapping technology, the non-woven fabric is better in uniformity, the adjustable range of the longitudinal and transverse strength is large, and a schematic diagram of the semi-cross technology is shown in figure 2.
The invention further claims a preparation method of the composite non-woven fabric, which comprises the following steps:
s1, silk fiber pretreatment: silk fiber is evenly sprayed with oil agent containing antistatic agent,
the pretreatment of the silk fiber aims to solve the problem of static electricity, and serious fly is easily formed in the production process under the condition of nonuse, so that the uniformity of the fiber web is influenced;
s2, preparing a silk fiber net: sequentially carrying out preliminary opening, fine opening, fiber decomposition and combing treatment on the pretreated silk fibers, carrying out single fiber formation, sending the obtained product into a cotton storage box and a carding machine for uniformly and directly laying the obtained product into a net, wherein the pressure in the cotton storage box is 800-850 Pa, the feeding speed of a cotton feeding roller of the carding machine is 0.4-0.50 m/min, the speed of a cylinder is 700-1200 m/min, the speed of an output fiber net is 30-40 m/min,
these parameters were chosen to ensure the quality of the silk fibres laid in a web, the average length of the resulting silk fibres laid in a web being 38mm, the average fineness being 1.46dtex, and the grammage of the silk fibre web layer being 12 + -2 g/m2；
S3, hemp fiber pretreatment: uniformly spraying a pretreatment solution on the hemp fibers, wherein the pretreatment solution comprises an oil agent and water, and the oil agent comprises an antistatic agent and a softening agent;
s4, preparing a hemp-cotton fiber net:
1) mixing the preprocessed hemp fibers and cotton fibers, sequentially removing big impurities and heavy impurities in the cotton fibers, preliminarily opening, removing foreign fibers, finely opening, discharging fine impurities, finely carding, sending into a cotton storage box and a carding machine to form a net uniformly, wherein the pressure of the cotton storage box is 850-950 Pa, the feeding speed of a cotton roller of the carding machine is 1.00-1.20 m/min, the cylinder speed is 800-1000 m/min, and the output fiber net speed is 38-42 m/min,
2) the two China hemp-cotton fiber nets are overlapped into 4 layers through full-crossing lapping, then drafting is carried out, the drafting multiple is divided into 7 levels, the drafting multiple of each level is 1.10-1.20, the drafting ratio is 1.5-2.0,
the hemp-cotton fiber web fed into the drafting machine is thick, the hemp-cotton fiber web is thinned through the drafting machine, the drafting multiple is adjusted, the gram weight of the hemp-cotton fiber web is controlled, and the unevenness of the hemp-cotton fiber web is output by 4.0-5.0%;
s5, hydroentangling and reinforcing the composite fiber web: the prepared 4 layers of crossed hemp-cotton fiber nets and 2 layers of directly-laid silk fiber nets are laid together to prepare a composite fiber net, the silk net is arranged on the cotton fiber net, and the composite fiber net is reinforced into a composite spunlace non-woven fabric through prewetting, spunlacing and vacuum suction;
s6, degreasing and bleaching: putting the mixture into a pressure container with the temperature of 100-105 ℃ and the pressure of 5MPa, sequentially adding a refining agent F403-5 g/L, sodium silicate 0.4-0.7 g/L, 32% (w/v) sodium hydroxide 5-7 g/L and 27.5% (v/v) hydrogen peroxide 14-18 g/L, degreasing and bleaching for 1-3 h, adding 0.5-0.7 g/L citric acid for neutralization,
silicates are used here as stabilizers;
s7, drying: the spunlaced silk-hemp-cotton composite non-woven fabric is subjected to negative pressure vacuum suction, roller pre-drying and rotary screen hot air penetrating type drying machine, and water remained in the non-woven fabric material is rapidly discharged.
The two layers of China-hemp-cotton fiber nets are overlapped into 4 layers through full-crossing lapping and then are combined with 2 layers of directly-paved silk fiber nets to carry out composite fiber net spunlace entanglement reinforcement, so that the performance index of the prepared non-woven fabric is more advantageous, and particularly, the absorptivity of the non-woven fabric is obviously superior to that of the non-woven fabric prepared by carrying out composite fiber net spunlace entanglement reinforcement on 6 layers of fiber nets prepared by silk-China-hemp-cotton-fiber blending.
Preferably, silk fiber is pretreated, and oil is sprayed on the silk fiber under the conditions that the ambient temperature is 22-28 ℃ and the humidity is 52-60%.
Preferably, silk fiber is pretreated, and the silk fiber is uniformly sprayed with a spraying oil agent containing an antistatic agent and is treated for 24-48 hours.
More preferably, the silk fiber is pretreated and sprayed with oil for 36 hours.
Preferably, silk fiber pretreatment, antistatic agent in oil agent: the mass ratio of the water is 1: 3-10.
More preferably, silk fiber pretreatment, antistatic agent in oil agent: the mass ratio of the water is 1: 6.
Preferably, the silk fiber is pretreated according to the following oil agent: silk fiber is 1: 20-100 mass ratio of oil solution.
More preferably, the silk fiber is pretreated according to the following oil agent: silk fiber is 1: an oil agent was used at a mass ratio of 30.
Preferably, a silk fibre web and/or a hemp-cotton fibre web is prepared, the feed being grabbed with a disc plucker.
Preferably, the silk fiber net and/or the hemp-cotton fiber net are prepared, and the cotton storage box is a ZGB1026 type cotton storage box.
Preferably, a silk fiber web is prepared and is delivered to a FA106 opener for fine opening by means of an air stream.
Preferably, a silk fiber web is prepared and finely carded using a ZWF1206 type pre-carding machine to be single-fibrillated.
Preferably, the silk fiber net is prepared, the pressure in a cotton storage box is 820Pa, a ZGB1213 carding machine is used for uniformly and directly laying the silk fiber net into the net, the feeding speed of a cotton feeding roller of the carding machine is 0.5m/min, the cylinder speed is 1000m/min, and the output fiber net speed is 35 m/min.
Preferably, the hemp fibers are pretreated, and the hemp fibers are uniformly sprayed with a pretreatment solution and treated for 24-48 hours.
More preferably, hemp fiber is pretreated and sprayed with oil for 36 hours.
Preferably, China hemp fiber is pretreated, and the mass ratio of the oil agent to the water in the pretreatment solution is 1:5 to 10.
More preferably, China hemp fiber is pretreated, and the mass ratio of the oil agent to the water in the pretreatment solution is 1: 7
Preferably, hemp fiber is pretreated according to the following pretreatment solution: china hemp fiber is 1: the mass ratio of 20-100 uses pretreatment solution.
More preferably, hemp fiber is pretreated by the following pretreatment solution: china hemp fiber is 1: 35 using a pretreatment solution.
Preferably, the China hemp fiber is pretreated, and the mass ratio of the antistatic agent to the softening agent in the oil agent is 2: 1.
Preferably, a hemp-cotton web is prepared and the air stream is sent to JWF1011 multi-functional separator to remove the large and heavy impurities from the cotton and hemp fibers.
Preferably, a hemp-cotton fiber web is prepared and subjected to preliminary opening using an JWF1012 single axial flow opener.
Preferably, a hemp-cotton fiber web is prepared, and the cotton flow after the initial opening is passed through a genius 8 defibrator to remove foreign fibers from the cotton fibers.
Preferably, a hemp-cotton fiber web is prepared, mixed by an JWF1022 multi-bin cotton mixer and then sent to a JWF1124 fine cotton opener for fine opening, discharging and reducing impurities.
Preferably, a hemp-cotton web is prepared and subjected to a fine carding using a pre-carding machine of the type ZWF 1206.
Preferably, a hemp-cotton web is prepared, and two cotton webs are overlapped by full cross lapping using a cross lapping machine type W1251C.
Preferably, a China hemp-cotton fiber net is prepared, the pressure of a cotton box is 900Pa, a ZGB1213 type carding machine is adopted for uniformly forming the net, the feeding speed of a cotton feeding roller is 1.150m/min, the cylinder speed is 950m/min, and the output fiber net speed is 40 m/min.
Preferably, a hemp-cotton web is prepared with a draft multiple of 1.13 per stage.
Preferably, a hemp-cotton web is prepared with a draw ratio of 1.8 on the draw machine.
After the two layers of hemp-cotton fibers from the carding machine are subjected to full-cross lapping, the two layers of fiber nets are overlapped into 4 layers, and the lapping machine changes the arrangement orientation of the hemp-cotton fibers and improves the longitudinal and transverse strength of the cloth cover.
Preferably, the hemp-cotton fiber net is prepared, and the hemp-cotton fiber net after cross lapping is sent to a W1168 type 21 roller drafting machine for drafting.
Preferably, the hydroentanglement consolidation compounding is carried out with a vacuum suction pressure of 8000 Pa.
Preferably, the pre-wetting adopts a steel wire mesh drum clamping mode, a single-drainage pricking plate with the thickness of 0.12mm is used, and the pressure of a pre-wetting water pricking head is controlled within 5 kg.
Preferably, the spunlace process adopts a mode of adding a rear platform to a front rotary drum and a rear rotary drum, 4 groups of spunlace heads are used together, the aperture of each spunlace head is 0.12mm, the pressure of each spunlace head of 2 groups of rotary drums is 15-20 bar and 28-33 bar respectively, and the pressure of each spunlace head of 2 groups of rotary drums is 32-38 bar and 15-20 bar respectively.
More preferably, the pressure of the water-jet heads of the front drum 2 group is respectively 19bar and 30bar, and the pressure of the water-jet heads of the rear drum 2 group is respectively 35bar and 18 bar.
Preferably, the winding speed is 80-150 m/min and the drying temperature is 130-150 ℃ in the drying process.
Preferably, degreasing and bleaching are carried out for 2 h.
Preferably, the dried product is cut according to the required width specification, and wound into a circular cloth roll for use.
The invention also claims the composite non-woven fabric prepared by the preparation method.
The invention also claims the application of the composite non-woven fabric in the preparation of disposable sanitary products.
Preferably, the disposable sanitary article is a sanitary napkin. Including, but not limited to, sanitary napkins, wet wipes, diapers, urine-barrier pads, and the like.
More preferably, the sanitary napkin is prepared by using the composite nonwoven fabric as a surface layer.
More preferably, the side with high silk content of the composite non-woven fabric is in contact with the skin.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a preparation method and application of a silk fiber-hemp fiber-cotton fiber composite non-woven fabric. The non-woven fabric adopts a half-cross parallel lapping technology, the silk fiber layer is directly paved, and the hemp cotton fiber layer is fully crossed. The non-woven fabric material combines the advantages of silk, hemp and cotton fibers, and avoids the defects. The silk fiber layer contacts the skin, and the longitudinally arranged fibers are easy to longitudinally diffuse menses and are not easy to leak laterally; the hemp cotton fiber layer contacts the diversion layer of the sanitary towel, so that the antibacterial property of the non-woven fabric is ensured, the using amount of hemp fiber is reduced, and discomfort caused by contact of thicker hemp fiber with skin is avoided; after the sanitary towel is manufactured, the sanitary towel is used as a surface layer, the structure is easy to permeate downwards and diffuse to the periphery, and the absorption speed and the reverse osmosis amount of the sanitary towel are obviously superior to those of sanitary towels made of other materials, so that the problem of side leakage of menstrual blood is solved, and the safety and the dryness of the sanitary towel are enhanced.
Drawings
FIG. 1 is a flow chart of a method for preparing a composite nonwoven fabric.
FIG. 2 is a schematic diagram of a half-crossover process.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples, which are provided for illustration only and are not intended to limit the scope of the invention. The test methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used are, unless otherwise specified, commercially available reagents and materials.
The antistatic agent for silk fiber pretreatment is S10, purchased from Ningbo Mijie textile materials Co., Ltd; the antistatic agent for hemp fiber pretreatment is FD-ZY06B, and the softening agent is FD-ZY06A, purchased from Zhejiang chemical Limited. The refining agent F40 in the degreasing and bleaching step was purchased from Ningbo Mijie textile materials, Inc.
Example 1A method for preparing a composite nonwoven fabric
(1) Pretreatment of silk fibers
Spraying an oil agent to the silk fiber under the conditions that the ambient temperature is 22 ℃ and the humidity is 52%, wherein the main component of the oil agent is an antistatic agent (model: S10), and the weight ratio of the oil agent is as follows: water 1:6 (mass ratio) is mixed and used according to the following ratio: silk fiber is 1: 30 (mass ratio) was uniformly sprayed on the fibers and treated for 36 hours.
(2) Preparing silk fiber net
The method comprises the steps of adopting pretreated 100% natural silk fibers, grabbing feed by a disc plucker, primarily opening the silk fibers, conveying the silk fibers to an FA106 opener by air flow, carrying out fine opening to further decompose the silk, feeding the decomposed silk into a ZWF1206 type pre-carding machine for fine carding to enable the silk to be single-fiberized, collecting, storing and ZGB1026 type cotton storage box, uniformly and directly laying the pressure of 820Pa in the cotton storage box, using a ZGB1213 carding machine to form a net, and feeding the cotton roller by the carding machine at a speed of 0.5m/min, using a cylinder at a speed of 1000m/min and outputting the net at a speed of 35 m/min.
The average length of the silk fiber of the net formation is 38mm, the average fineness is 1.46dtex, and the gram weight of the silk fiber net layer is 12 plus or minus 2g/m2。
(3) Hemp fiber pretreatment
Spraying a pretreatment solution to the hemp fibers under the conditions of the ambient temperature of 26 ℃ and the humidity of 55%, wherein the pretreatment solution: silk fiber is 1: 35 are uniformly sprayed on the fibers and treated for 36 hours. The pretreatment solution is prepared from an oil agent and water according to the following steps: water 1: 7, the oil agent is formed by compounding an antistatic agent and a softening agent, and the mass ratio is 2: 1.
(4) preparation of hemp-cotton fiber webs
After the hemp fibers and the cotton fibers are mixed according to a certain proportion (the mass ratio of the hemp fibers to the cotton fibers is 0.5: 1), grabbing and feeding the mixture by using a disc plucker, conveying the mixture to a JWF1011 multifunctional separator by using air flow to remove large impurities and heavy impurities in the fibers, conveying the mixture to an JWF1012 single-shaft flow opener for primary opening, allowing the opened fiber flow to pass through a genizer 8 foreign fiber machine to remove foreign fibers in the hemp-cotton fibers, mixing the mixture by a JWF1022 multi-bin cotton mixer, conveying the mixture to a JWF1124 fine opener, finely opening the cotton flow, reducing fine impurities, and finely carding the mixture by using a ZWF1206 type pre-carding machine. After carding, the cotton is sent to a ZGB1026 type cotton storage box, the pressure of the cotton storage box is 900Pa, a ZGB1213 type carding machine is adopted to uniformly form a net, the feeding speed of a cotton feeding roller is 1.150m/min, the cylinder speed is 950m/min, and the output fiber net speed is 40 m/min.
After the carding machine comes out of the net, the card enters a W1251C type cross lapping machine for cross lapping, and a lapping width of 4 layers of fiber webs (at the beginning, a straight lapping process is performed in a direction perpendicular to the running direction of the equipment, the fiber webs are two layers of fiber webs coming out of the carding machine, and after the two layers of fiber webs are subjected to full cross lapping, the two layers of fiber webs are overlapped to form 4 layers) is 2.6 m. The lapping machine changes the arrangement orientation of China hemp-cotton fiber, and improves the vertical and horizontal strength of the cloth cover. The crosslapped web was fed to a W1168 type 21-roll drafting machine with a draft multiple of 7 stages, each stage had a draft multiple of 1.13 (web thickness fed to the drafting machine, web thickness reduced by the drafting machine), and the draft ratio of the drafting machine was 1.8.
The unevenness of the output cotton fiber web is 4.3 percent, and the gram weight of the obtained hemp-cotton fiber web layer is 22 +/-2 g/m2。
(5) Composite fiber web spunlace entanglement reinforcement
The method comprises the following steps of (1) paving 4 layers of prepared cross China hemp-cotton fibers and 2 layers of directly paved silk fiber nets together to prepare a composite fiber net, wherein a silk net is arranged on the China hemp-cotton fibers, and the composite fiber net is reinforced into a composite spunlace non-woven fabric through prewetting, spunlacing and vacuum suction (vacuum pressure of 8000 Pa); the pre-wetting adopts a steel wire mesh drum clamping mode, a single drainage pricking plate with the thickness of 0.12mm is used, and the pressure of a pre-wetting water pricking head is controlled within 5 bar. The spunlace process adopts a mode of adding two rotary drums and a rear platform, 4 groups of spunlace heads are used together, the aperture of each spunlace head is 0.12mm, 2 spunlace heads of each rotary drum are respectively provided with 19bar and 30bar of pressure of the spunlace heads of the front rotary drum 2 group, and 35bar and 18bar of pressure of the spunlace heads of the rear rotary drum 2 group.
(6) Degreasing and bleaching
The composite spunlace non-woven fabric is wound into a fabric, and then is placed into a pressure container with the temperature of 100-105 ℃ and the pressure of 0.5MPa, 4.0g/L of a refining agent F40 (purchased finished product), 0.5g/L of a stabilizing agent (sodium silicate), 6g/L of 32% (w/v) sodium hydroxide and 16g/L of 27.5% (v/v) hydrogen peroxide are sequentially added, degreasing and bleaching are carried out for 2 hours, and 0.6g/L of citric acid is added for neutralization.
(7) Drying by baking
The spunlaced composite non-woven fabric is subjected to negative pressure vacuum suction, roller pre-drying and rotary screen hot air penetrating type drying machine, so that moisture remained in the non-woven fabric material is rapidly discharged; the winding speed is 120m/min, and the drying temperature is 140 ℃.
(8) Slitting package
Cutting according to the required width specification, and winding into a circular cloth roll for use.
Example 2 preparation method of composite nonwoven fabric
(1) Pretreatment of silk fibers
Spraying an oil agent to the silk fiber under the conditions that the ambient temperature is 25 ℃ and the humidity is 56%, wherein the main component of the oil agent is an antistatic agent (model: S10), and the weight ratio of the oil agent is as follows: water was mixed at a ratio of 1:3 (mass ratio) and used as an oil: the silk fiber is uniformly sprayed on the fiber in a ratio of 1:20 (mass ratio), and treated for 24 hours.
(2) Preparing silk fiber net
The method comprises the steps of adopting pretreated 100% natural silk fibers, grabbing feed by a disc plucker, primarily opening the silk fibers, conveying the silk fibers to an FA106 opener by air flow, carrying out fine opening to further decompose the silk, feeding the decomposed silk into a ZWF1206 type pre-carding machine for fine carding to enable the silk to be single-fiberized, collecting, storing and ZGB1026 type cotton storage box, uniformly and directly laying the silk in the cotton storage box at a pressure of 800Pa by a ZGB1213 carding machine, wherein the feeding speed of a cotton feeding roller of the carding machine is 0.4m/min, the cylinder speed is 700m/min, and the output fiber web speed is 30 m/min.
The average length of the silk fiber of the net formation is 38mm, the average fineness is 1.46dtex, and the gram weight of the silk fiber net layer is 12 plus or minus 2g/m2。
(3) Hemp fiber pretreatment
Spraying a pretreatment solution to the hemp fibers under the conditions of an ambient temperature of 25 ℃ and a humidity of 55%, wherein the pretreatment solution comprises the following components in percentage by weight: the silk fibres were sprayed evenly in a ratio of 1:20 onto the fibres and treated for 24 hours. The pretreatment solution is prepared from an oil agent and water according to the following steps: the water is mixed according to the proportion of 1:5 and then used, and the oil agent is prepared by compounding an antistatic agent and a softening agent according to the proportion of 2: 1.
(4) Preparation of hemp-cotton fiber webs
After the hemp fibers and the cotton fibers are mixed according to a certain proportion (the mass: the hemp fibers and the cotton fibers are 0.3: 1), a disc plucker is used for grabbing and feeding the materials, the materials are conveyed to a JWF1011 multifunctional separator by air flow to remove large impurities and heavy impurities in the fibers, the materials are conveyed to an JWF1012 single-shaft flow opener for preliminary opening, the opened fibers flow through a genizer 8 foreign fiber machine to remove foreign fibers in the hemp-cotton fibers, the foreign fibers are mixed by a JWF1022 multi-bin cotton mixer and then conveyed to a JWF1124 fine opener, the cotton flow is finely opened, fine impurities are reduced, and the cotton flow enters a ZWF1206 type pre-carding machine for fine carding. After carding, the cotton is sent to a ZGB1026 type cotton storage box, the pressure of the cotton storage box is 850Pa, a ZGB1213 type carding machine is adopted to uniformly form a net, the feeding speed of a cotton feeding roller is 1.00m/min, the cylinder speed is 800m/min, and the output fiber net speed is 38 m/min.
After the carding machine comes out of the net, the card enters a W1251C type cross lapping machine for cross lapping to be lapped into 4 layers of fiber webs (at the beginning, a straight lapping process is vertical to the running direction of the equipment, the fiber webs at the moment are two layers of fiber webs coming out of the carding machine, after the full cross lapping, the two layers of fiber webs are overlapped into 4 layers), and the lapping width is 2.5 m. The lapping machine changes the arrangement orientation of China hemp-cotton fiber and improves the vertical and horizontal strength of the cloth cover. The crosslapped web was fed to a 21-roll drawing machine of type W1168, the draft ratio was 7 stages, the draft ratio of each stage was 1.10 (web thickness fed to the drawing machine, web thickness was reduced by the drawing machine), and the draft ratio of the drawing machine was 1.5.
The unevenness of the output cotton fiber web is 4.4 percent, and the gram weight of the obtained hemp-cotton fiber web layer is 22 +/-2 g/m2。
(5) Composite fiber web spunlace entanglement reinforcement
The method comprises the following steps of (1) paving 4 layers of prepared crossed hemp-cotton fiber nets and 2 layers of directly paved silk fiber nets together to prepare a composite fiber net, wherein a silk net is arranged on the hemp-cotton fiber net, and the composite fiber net is reinforced into a composite spunlace non-woven fabric through prewetting, spunlacing and vacuum suction (vacuum pressure of 8000 Pa); the pre-wetting adopts a steel wire mesh drum clamping mode, a single drainage pricking plate with the thickness of 0.12mm is used, and the pressure of a pre-wetting water pricking head is controlled within 5 bar. The spunlace process adopts a mode of adding two rotary drums and a rear platform, 4 groups of spunlace heads are used together, the aperture of each spunlace head is 0.12mm, 2 spunlace heads of each rotary drum are respectively provided with 15bar and 33bar of pressure of the spunlace heads of the front rotary drum 2 group, and 32bar and 15bar of pressure of the spunlace heads of the rear rotary drum 2 group.
(6) Degreasing and bleaching
The composite spunlace non-woven fabric is wound into a fabric, then the fabric is placed into a pressure container with the temperature of 100 ℃ and the pressure of 5MPa, 3g/L of a refining agent F40 (purchased finished product), 0.4g/L of a stabilizing agent (sodium silicate), 5g/L of 32% (w/v) sodium hydroxide and 14g/L of 27.5% (v/v) hydrogen peroxide are sequentially added, degreasing and bleaching are carried out for 2h, and 0.5g/L of citric acid is added for neutralization.
(7) Drying by baking
The spunlaced composite non-woven fabric is subjected to negative pressure vacuum suction, roller pre-drying and rotary screen hot air penetrating type drying machine, so that moisture remained in the non-woven fabric material is rapidly discharged; the winding speed is 80m/min, and the drying temperature is 130 ℃.
(8) Slitting package
Cutting according to the required width specification, and winding into a circular cloth roll for use.
Example 3 preparation method of composite nonwoven fabric
(1) Pretreatment of silk fibers
Spraying an oil agent to the silk fiber under the conditions that the ambient temperature is 28 ℃ and the humidity is 60%, wherein the main component of the oil agent is an antistatic agent (model: S10), and the weight ratio of the oil agent is as follows: water was mixed at a ratio of 1:10 (mass ratio) and used as an oil: the silk fiber is uniformly sprayed on the fiber in a ratio of 1:100 (mass ratio), and treated for 48 hours.
(2) Preparing silk fiber net
Adopting pretreated 100% natural silk fiber, grabbing feed by using a disc plucker, primarily opening the silk fiber, conveying the silk fiber to an FA106 opener by using air flow, carrying out fine opening, further decomposing the silk, feeding the decomposed silk into a ZWF1206 type pre-carding machine for fine and fine carding, enabling the silk to be single-fiberized, collecting, storing and ZGB1026 type cotton storage box, uniformly and directly laying the pressure in the cotton storage box at 850Pa by using a ZGB1213 carding machine to form a net, wherein the feeding speed of a cotton feeding roller of the carding machine is 0.50m/min, the cylinder speed is 1200m/min, and the output fiber net speed is 40 m/min.
The average length of the silk fiber of the net formation is 38mm, the average fineness is 1.46dtex, and the gram weight of the silk fiber net layer is 12 plus or minus 2g/m2。
(3) Hemp fiber pretreatment
Spraying a pretreatment solution to the hemp fibers under the conditions of an ambient temperature of 28 ℃ and a humidity of 60%, wherein the pretreatment solution: silk fiber is 1:100 mass percent is evenly sprayed on the fiber and treated for 48 hours. The pretreatment solution is prepared from an oil agent and water according to the following steps: the water is mixed according to the mass ratio of 1:10 and then used, and the oil agent is prepared by compounding an antistatic agent and a softening agent according to the ratio of 2: 1.
(4) Preparation of hemp-cotton fiber webs
After the hemp fibers and the cotton fibers are mixed according to a certain proportion (the mass: the hemp fibers and the cotton fibers are 0.8: 1), a disc plucker is used for grabbing and feeding the materials, the materials are conveyed to a JWF1011 multifunctional separator by air flow to remove large impurities and heavy impurities in the fibers, the materials are conveyed to an JWF1012 single-shaft flow opener for preliminary opening, the opened fibers flow through a genizer 8 foreign fiber machine to remove foreign fibers in the hemp-cotton fibers, the foreign fibers are mixed by a JWF1022 multi-bin cotton mixer and then conveyed to a JWF1124 fine opener, the cotton flow is finely opened, fine impurities are reduced, and the cotton flow enters a ZWF1206 type pre-carding machine for fine carding. After carding, the cotton is sent to a ZGB1026 type cotton storage box, the pressure of the cotton storage box is 950Pa, a ZGB1213 type carding machine is adopted to uniformly form a net, the feeding speed of a cotton feeding roller is 1.20m/min, the cylinder speed is 1000m/min, and the output fiber net speed is 42 m/min.
After the carding machine comes out of the net, the card enters a W1251C type cross lapping machine for cross lapping, and 4 layers of fiber webs are lapped (at the beginning, a straight lapping process is carried out in a direction perpendicular to the running direction of the equipment, the fiber webs are two layers of fiber webs coming out of the carding machine, and after the two layers of fiber webs are subjected to full cross lapping, the two layers of fiber webs are overlapped to form 4 layers) with the lapping width of 2.7 m. The lapping machine changes the arrangement orientation of China hemp-cotton fiber, and improves the vertical and horizontal strength of the cloth cover. The crosslapped web was fed to a 21-roll drafting machine of type W1168, the draft ratio was 7 stages, the draft ratio of each stage was 1.12 (web thickness fed to the drafting machine, web thickness was reduced by the drafting machine), and the draft ratio of the drafting machine was 2.0
The unevenness of the output cotton fiber web is 4.1 percent, and the gram weight of the obtained hemp-cotton fiber web layer is 22 +/-2 g/m2。
(5) Composite fiber web spunlace entanglement reinforcement
The method comprises the following steps of (1) paving 4 layers of prepared crossed hemp-cotton fiber nets and 2 layers of directly paved silk fiber nets together to prepare a composite fiber net, wherein a silk net is arranged on the hemp-cotton fiber net, and the composite fiber net is reinforced into a composite spunlace non-woven fabric through prewetting, spunlacing and vacuum suction (vacuum pressure of 8000 Pa); the pre-wetting adopts a steel wire mesh drum clamping mode, a single drainage pricking plate with the thickness of 0.12mm is used, and the pressure of a pre-wetting water pricking head is controlled within 5 bar. The spunlace process adopts a mode of adding two rotary drums and a rear platform, 4 groups of spunlace heads are used together, the aperture of each spunlace head is 0.12mm, 2 spunlace heads of each rotary drum are respectively provided with 20ar and 28bar of pressure of the spunlace heads of the front rotary drum 2 group, and 38bar and 20bar of pressure of the spunlace heads of the rear rotary drum 2 group.
(6) Degreasing and bleaching
The composite spunlace non-woven fabric is wound into a fabric, then the fabric is placed into a pressure container with the temperature of 105 ℃ and the pressure of 5MPa, 5g/L of a refining agent F40 (purchased finished product), 0.7g/L of a stabilizing agent (sodium silicate), 7g/L of 32% (w/v) sodium hydroxide and 18g/L of 27.5% (v/v) hydrogen peroxide are sequentially added, degreasing and bleaching are carried out for 2h, and 0.7g/L of citric acid is added for neutralization.
(7) Drying by baking
The spunlaced composite non-woven fabric is subjected to negative pressure vacuum suction, roller pre-drying and rotary screen hot air penetrating type drying machine, so that moisture remained in the non-woven fabric material is rapidly discharged; the winding speed is 150m/min, and the drying temperature is 150 ℃.
(8) Slitting package
Cutting according to the required width specification, and winding into a circular cloth roll for use.
Comparative example 1 preparation method of pure cotton spunlace nonwoven fabric
The difference from the embodiment 1 is that the silk fiber and the hemp fiber are not contained, pure cotton non-woven fabric is prepared by completely adopting pure cotton feeding, and the specific preparation method comprises the following steps:
the cotton fiber is grabbed by a disc plucker to feed, and is conveyed to a JWF1011 multifunctional separator by air flow to remove large impurities and heavy impurities in the cotton fibers, and is conveyed to a JWF1012 single-axial-flow cotton opener to be primarily opened, the opened cotton flow passes through a genium 8 foreign fiber machine to remove foreign fibers in the cotton fibers, and is mixed by a JWF1022 multi-bin cotton mixer and then is conveyed to a JWF1124 fine cotton opener to finely open the cotton flow, finely reduce the impurities, and then enters a ZWF1206 type pre-carding machine to be finely carded.
After carding, the silk is respectively sent to two ZGB1026 type cotton storage boxes, one is uniformly laid into a net by adopting a ZGB1213 type carding machine according to the silk straight laying process in the embodiment 1, the other is uniformly laid into a net by adopting a ZGB1213 type carding machine, the net is subjected to W1251C type cross laying according to the cotton fiber process in the embodiment 1, and other spunlace and drying processes are the same. The degreasing and bleaching process is different due to the fact that silk-free components are not used.
The degreasing and bleaching process comprises the following steps: the composite spunlace non-woven fabric is wound into a fabric, then the fabric is placed into a pressure container with the temperature of 100-105 ℃ and the pressure of 0.5MPa, 0.7g/L stabilizer (sodium silicate), 10g/L sodium hydroxide (32%), 16g/L hydrogen peroxide (27.5%), degreasing and bleaching for 2h, and adding 1.0g/L citric acid for neutralization.
Comparative example 2 preparation method of spun-laced non-woven fabric blended by silk, hemp and cotton
The difference from the example 1 is that the pretreated silk fiber is not fed into a net separately, but is mixed with hemp and cotton fiber according to the mass ratio of 5: 4: 8, conveying the mixture to a JWF1011 multifunctional separator by utilizing an air flow to remove large impurities and heavy impurities in cotton fibers and hemp fibers, conveying the mixture to a JWF1012 single-axial-flow cotton opener for preliminary opening, discharging foreign fibers in the cotton fibers by a genium 8 foreign fiber machine after opening the cotton flow, mixing the cotton flow by a JWF1022 multi-bin cotton mixer, conveying the cotton flow to a JWF1124 fine cotton opener, finely opening the cotton flow, discharging the fine impurities, and finely carding the cotton flow by a ZWF1206 type pre-carding machine.
After carding, the silk is respectively sent to two ZGB1026 type cotton storage boxes, one is uniformly laid into a net by adopting a ZGB1213 type carding machine according to the silk direct laying process in the embodiment 1, the other is uniformly laid into a net by adopting a ZGB1213 type carding machine, after the net is laid, the silk enters a W1251C type cross laying according to the hemp cotton fiber process in the embodiment 1, and other spunlace, degreasing bleaching and drying processes are the same.
Comparative example 3 preparation method of silk cotton spunlace nonwoven fabric
The difference from the embodiment 1 is that the step (4) is changed into: the hemp-cotton fiber net is prepared without hemp fibers, 4 layers of crossed pure cotton fiber nets are prepared by adopting pure cotton fiber feeding, and then the crossed pure cotton fiber nets and 2 layers of silk fiber nets are overlaid together to prepare the composite fiber net, and other spunlace, degreasing, bleaching and drying processes are the same.
Application example 1
The nonwoven fabrics prepared in examples 1 to 3 and comparative examples 1 to 3 were examined for softness, longitudinal tensile strength, longitudinal elongation, transverse tensile strength, transverse elongation, thickness and water absorption rate. The detection method refers to GB/T24218.1-2009, GB/T24218.2-2009, GB/T24218.3-2010, GB/T24218.6-2010 and GB/T8942-2002.
The results are shown in Table 1.
Table 1:
Figure BDA0002817634240000131
Figure BDA0002817634240000141
after the water absorption speed is higher than 80mm/5min, the cloth cover generally absorbs too much water, and the surface is wet when the sanitary towel is used for preparing the sanitary towel in the later period; after the water absorption speed is less than 80mm/5min, the cloth cover generally shows stronger water absorption, and the surface is drier and comfortable when the sanitary towel is used for preparing the sanitary towel in the later period. The water absorption speed of the non-woven fabric prepared in the embodiment 1-3 is 70-72 mm/5 min. The composite non-woven fabric prepared by the invention has the advantages of fast water absorption and good softness, and is more suitable for preparing sanitary towels.
Application example 2
Sanitary napkins were prepared by using the nonwoven fabrics prepared in examples 1 to 3 and comparative examples 1 to 3 as the surface layers of sanitary napkins, with the surface of examples 1 to 3 having a high content of silk being in contact with the skin and the other surface being in contact with the flow guide layer of the sanitary napkin.
And detecting the absorption speed and the reverse osmosis amount of the prepared sanitary towel. The detection method is described in GB/T8939-2018, GB/T28004-2011.
The results are shown in Table 2.
Table 2:
example 1 Example 2 Example 3 Comparative example 1 Comparative example 2 Comparative example 3
Absorption Rate(s) 5.20 5.37 5.26 12.03 5.93 6.18
Reverse osmosis amount (g) 1.09 1.14 1.21 2.78 1.32 1.41
Surface of Dry and comfortable Dry and comfortable Dry and comfortable Moisture content Dry and comfortable Dry and comfortable
The detection results can show that the non-woven fabric prepared by the invention is applied to the sanitary towel, the absorption speed is faster than the proportion, the non-woven fabric has good dry and comfortable effect, the reverse osmosis amount is obviously smaller than the proportion, and the occurrence of side leakage can be reduced.
Application example 3
The antibacterial properties of the nonwoven fabrics prepared in examples 1 to 3 and comparative examples 1 to 3 were examined. The detection method refers to the third part of the evaluation of the antibacterial performance of the textile in GB/T20944.3-2008: an oscillation method.
The results are shown in Table 3.
Table 3:
Figure BDA0002817634240000151
the detection results show that the non-woven fabric containing the hemp fibers has antibacterial property, and particularly, the antibacterial property of the composite non-woven fabric prepared by the technology is superior to that of the composite non-woven fabric prepared by blending silk, hemp and cotton fibers.
Application example 4
The non-woven fabrics prepared in examples 1 to 3 and comparative examples 1 to 3 were used as the surface layers of the sanitary napkins to prepare the sanitary napkins, and the surface with high content of silk in examples 1 to 3 and comparative examples 2 to 3 was in contact with the skin, and the other surface was in contact with the flow guide layer of the sanitary napkins. The surface layers of the sanitary napkins prepared in examples 1 to 3 and comparative examples 1 to 3 were examined for antibacterial properties. The detection method refers to GB 15979-
The results are shown in Table 4.
Table 4:
Figure BDA0002817634240000152
the detection results show that the sanitary towel prepared from the non-woven fabric containing the hemp fibers has antibacterial property, and particularly, the antibacterial property of the sanitary towel prepared by the technology of the invention is superior to that of the sanitary towel containing the composite non-woven fabric prepared by blending the silk, the hemp fibers and the cotton fibers.

Claims (10)

1. The composite non-woven fabric is characterized in that a silk fiber net layer and a China hemp-cotton fiber net layer are stacked and are prepared through a spunlace process, the silk layer is obtained through direct laying and lapping, the China hemp-cotton fiber net layer is obtained through full-cross lapping, and the China hemp-cotton fiber net layer is a fiber net layer prepared through mixing China hemp fibers and cotton fibers.
2. The preparation method of the composite non-woven fabric is characterized by comprising the following steps:
s1, silk fiber pretreatment: uniformly spraying a spraying oil agent containing an antistatic agent on the silk fiber;
s2, preparing a silk fiber net: sequentially carrying out preliminary opening, fine opening, fiber decomposition and combing on the pretreated silk fibers, carrying out single fiber formation, sending the silk fibers into a cotton storage box and a carding machine to uniformly and directly lay the silk into a net, wherein the pressure in the cotton storage box is 800-850 Pa, the feeding speed of a cotton feeding roller of the carding machine is 0.4-0.50 m/min, the speed of a cylinder is 700-1200 m/min, and the speed of an output fiber net is 30-40 m/min;
s3, hemp fiber pretreatment: uniformly spraying a pretreatment solution on the hemp fibers, wherein the pretreatment solution comprises an oil agent and water, and the oil agent comprises an antistatic agent and a softening agent;
s4, preparing a hemp-cotton fiber net:
1) after mixing the preprocessed hemp fibers and the cotton fibers, sequentially removing big impurities and heavy impurities in the cotton fibers, preliminarily opening, removing foreign fibers, finely opening, discharging and reducing fine impurities, finely carding, sending into a cotton storage box and a carding machine to form a uniform net, wherein the pressure of the cotton storage box is 850-950 Pa, the feeding speed of a cotton roller of the carding machine is 1.00-1.20 m/min, the cylinder speed is 800-1000 m/min, and the output fiber net speed is 38-42 m/min;
2) the two layers of cotton fiber webs are overlapped into 4 layers through full-crossing lapping, then drafting is carried out, the drafting multiple is divided into 7 levels, the drafting multiple of each level is 1.10-1.20, and the drafting ratio is 1.5-20;
s5, hydroentangling and reinforcing the composite fiber web: the prepared 4 layers of crossed hemp-cotton fiber nets and 2 layers of directly-laid silk fiber nets are laid together to prepare a composite fiber net, the silk net is arranged on the cotton fiber net, and the composite fiber net is reinforced into a composite spunlace non-woven fabric through prewetting, spunlacing and vacuum suction;
s6, degreasing and bleaching: putting the mixture into a pressure container with the temperature of 100-105 ℃ and the pressure of 5MPa, adding 0.4-0.7 g/L of sodium silicate, 5-7 g/L of 32% (w/v) sodium hydroxide and 14-18 g/L of 27.5% (v/v) hydrogen peroxide in a distributed manner, degreasing and bleaching for 1-3 h, and adding 0.5-0.7 g/L of citric acid for neutralization;
s7, drying: the spunlaced silk-hemp-cotton composite non-woven fabric is subjected to negative pressure vacuum suction, roller pre-drying and rotary screen hot air penetrating type drying machine, and water remained in the non-woven fabric material is rapidly discharged.
3. The preparation method according to claim 2, wherein the amount by mass ratio of the oil agent to the water in the pretreatment solution is 1:5 to 10.
4. The method of claim 2, wherein the ratio of the pretreatment solution: silk fiber is 1: the mass ratio of 20-100 uses pretreatment solution.
5. The preparation method according to claim 2, wherein the mass ratio of the hemp fiber to the cotton fiber is 0.3-0.8: 1.
6. The preparation method of claim 2, wherein the pre-wetting adopts a steel wire mesh drum clamping mode, a single-drainage pricking plate with the thickness of 0.12mm is used, and the pressure of a pre-wetting water pricking head is controlled within 4 bar.
7. The preparation method of claim 2, wherein the spunlace process adopts a two-drum and rear-platform manner, 4 groups of spunlace heads are used together, the aperture of each spunlace head is 0.12mm, the pressure of each spunlace head of 2 groups of the front drum is 15-20 bar and 28-33 bar respectively, and the pressure of each spunlace head of 2 groups of the rear drum is 32-38 bar and 15-20 bar respectively.
8. The process according to claim 7, wherein the pressure of the water-jet heads of the preceding drum 2 group is 19bar and 30bar respectively, and the pressure of the water-jet heads of the following drum 2 group is 35bar and 18bar respectively.
9. A composite nonwoven fabric produced by the production method according to any one of claims 2 to 8.
10. Use of the composite nonwoven fabric according to claim 1 or 9 for the preparation of disposable hygiene articles.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114232214A (en) * 2021-12-28 2022-03-25 淄博欧木特种纸业有限公司 Production process of wormwood fiber spunlace non-woven fabric
CN114775166A (en) * 2022-04-14 2022-07-22 智程无纺布(江苏)有限公司 Degradable dual-composite antibacterial spunlace nonwoven fabric and preparation method thereof
CN115305645A (en) * 2022-08-08 2022-11-08 济南圣泉集团股份有限公司 Plant fiber composite spunlace non-woven fabric and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114232214A (en) * 2021-12-28 2022-03-25 淄博欧木特种纸业有限公司 Production process of wormwood fiber spunlace non-woven fabric
CN114775166A (en) * 2022-04-14 2022-07-22 智程无纺布(江苏)有限公司 Degradable dual-composite antibacterial spunlace nonwoven fabric and preparation method thereof
CN114775166B (en) * 2022-04-14 2023-09-22 智程无纺布(江苏)有限公司 Degradable double-composite antibacterial spunlaced non-woven fabric and preparation method thereof
CN115305645A (en) * 2022-08-08 2022-11-08 济南圣泉集团股份有限公司 Plant fiber composite spunlace non-woven fabric and preparation method thereof

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