CN110699860A - Soft and smooth non-woven fabric and preparation method and application thereof - Google Patents
Soft and smooth non-woven fabric and preparation method and application thereof Download PDFInfo
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- CN110699860A CN110699860A CN201911128569.5A CN201911128569A CN110699860A CN 110699860 A CN110699860 A CN 110699860A CN 201911128569 A CN201911128569 A CN 201911128569A CN 110699860 A CN110699860 A CN 110699860A
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000002121 nanofiber Substances 0.000 claims abstract description 149
- 239000010410 layer Substances 0.000 claims abstract description 139
- 239000002344 surface layer Substances 0.000 claims abstract description 48
- -1 polypropylene Polymers 0.000 claims description 74
- 239000004743 Polypropylene Substances 0.000 claims description 60
- 229920001155 polypropylene Polymers 0.000 claims description 60
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 47
- 229920001971 elastomer Polymers 0.000 claims description 31
- 239000000806 elastomer Substances 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000000155 melt Substances 0.000 claims description 11
- 239000004902 Softening Agent Substances 0.000 claims description 10
- 125000002091 cationic group Chemical group 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 229920001577 copolymer Polymers 0.000 claims description 9
- 235000021355 Stearic acid Nutrition 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 7
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 239000008117 stearic acid Substances 0.000 claims description 7
- 238000005098 hot rolling Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000002752 cationic softener Substances 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- REZZEXDLIUJMMS-UHFFFAOYSA-M dimethyldioctadecylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC REZZEXDLIUJMMS-UHFFFAOYSA-M 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 9
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- 238000005086 pumping Methods 0.000 description 6
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- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 3
- 229920000053 polysorbate 80 Polymers 0.000 description 3
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 description 2
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- 229920005989 resin Polymers 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
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Images
Classifications
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
- D04H3/147—Composite yarns or filaments
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
Abstract
The invention relates to a soft and smooth non-woven fabric and a preparation method and application thereof. The non-woven fabric comprises three nano fiber soft layers with different physical properties, wherein the nano fiber soft layers are arranged in a stacked mode, the surface layer is low in softness but smooth in hand feeling, the softness of the lower two layers is greatly increased, the cotton soft effect is achieved, the non-woven fabric is stacked into the cotton soft and smooth non-woven fabric, each layer comprises a plurality of nano modified silk soft fibers, and the nano modified silk soft fibers are arranged in a staggered mode. And the nonwoven fabric also has excellent strength and extensibility.
Description
Technical Field
The invention belongs to the technical field of medical and health care products, particularly relates to a non-woven fabric and a preparation method and application thereof, and particularly relates to a soft and smooth non-woven fabric and a preparation method and application thereof.
Background
The non-woven fabric is a fabric formed without spinning woven fabric, and is formed by performing directional spinning or irregular melt-blown arrangement on short fibers or filaments formed by modifying a polypropylene material to form a composite fiber web structure, and then reinforcing the composite fiber web structure by adopting methods such as mechanical hot rolling, spun-bonding or chemical method. Compared with the traditional process, the method has the characteristics of short process flow, stable quality, high production speed, high yield, low cost, environmental protection, wide application and the like. Nonwoven fabrics are widely used in medical and sanitary fabrics, decorative fabrics, military fabrics, automotive fabrics, and the like. However, the current nonwoven fabric can not meet some special requirements in terms of softness and smoothness, and particularly, the medical and sanitary cloth, such as a sanitary towel, can cause discomfort to human bodies.
CN208841980U discloses a melt-blown composite water-absorbing sanitary nonwoven fabric, which is a three-layer structure, wherein the upper layer and the lower layer are hydrophilic melt-blown layers with good hygroscopicity and soft hand feeling, and the middle layer is an SAP resin layer with super-strong water absorbability. The product has excellent water absorption performance due to the addition of the SAP resin layer, the water absorption performance of the composite product is increased due to the hydrophilic melt-blown layer, the hand feeling of the composite product is increased, the three layers of materials are compounded through a hot rolling process, and the product has the advantages of good water absorption performance, soft hand feeling, light weight and the like, and is an ideal core layer material of a sanitary product. Although the product has certain improvement on moisture absorption and softness, the improvement on softness is not very obvious, and the good softness, strength and extensibility of the product cannot be simultaneously met.
CN105369645A relates to a production process of antistatic polypropylene fiber non-woven fabric, which comprises 1) ingredients: the weight ratio is as follows: 92-96 parts of polypropylene, 2.5-5 parts of antistatic master batch, 1-2 parts of hydrophilic master batch and 0.5-1 part of soft master batch are uniformly mixed to prepare an antistatic polypropylene mixed raw material; 2) feeding and melting: and uniformly mixing the mixed raw materials, pouring the mixed raw materials into a feeding hopper, extruding the mixed raw materials by an extruder, and then feeding the mixed raw materials in the extruder into a screw extruder for melting operation and the like to obtain the polypropylene non-woven fabric with good antistatic property. The product does a certain work on softness, but the effect is not obvious.
CN208917450U discloses a CSCM composite non-woven fabric, which comprises a carded fiber web layer I, a spunbonded fiber web layer, a carded fiber web layer II and a superfine melt-blown layer, so as to form a four-layer composite non-woven fabric; the carding fiber net layer I and the carding fiber net layer II are used as supports of the composite material, so that the product has excellent water absorption performance and hand feeling, the strength of the composite product is increased by the aid of the spunbonded fiber net layer, the hand feeling and wiping effect of the composite product are increased by the aid of the superfine melt-blown layer, the four layers of materials are formed by being compounded through a spunlace process, the product has the advantages of being soft in hand feeling, good in wiping effect and the like, and the product is an ideal infant wet tissue and wiping product.
In conclusion, no product which is soft and smooth and has excellent strength and extensibility exists in the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a non-woven fabric and a preparation method and application thereof, and particularly provides a soft and smooth non-woven fabric and a preparation method and application thereof. The product is very soft and smooth, has high strength and extensibility, and is very suitable for being applied to the field of medical and health care products.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, the present invention provides a soft and smooth nonwoven fabric comprising a nanofiber soft surface layer, a nanofiber soft intermediate layer, and a nanofiber soft bottom layer, which are sequentially stacked.
The non-woven fabric comprises three nano fiber soft layers with different physical properties, wherein the nano fiber soft layers are arranged in a stacked mode, the surface layer is low in softness but smooth in hand feeling, the softness of the lower two layers is greatly increased, the cotton soft effect is achieved, the non-woven fabric is stacked into the cotton soft and smooth non-woven fabric, each layer comprises a plurality of nano modified silk soft fibers, and the nano modified silk soft fibers are arranged in a staggered mode. And the nonwoven fabric also has excellent strength and extensibility.
Preferably, the nanofiber soft surface layer comprises polypropylene and soft master batches; the nanofiber soft middle layer comprises polypropylene, soft master batches and a nano elastomer; the nanofiber soft bottom layer comprises polypropylene, soft master batches and a nano elastomer.
As mentioned above, the non-woven fabric comprises three nano-fiber soft layers with different physical properties, which are stacked, the types or the mass ratios of the preparation raw materials of the layers are different, the three layers are matched with each other, so that the effects of softness and smoothness are achieved together, and the non-woven fabric can be ensured to have excellent strength and extensibility.
Preferably, the thickness of the soft and smooth nonwoven is 0.10-0.16nm, such as 0.10nm, 0.11nm, 0.12nm, 0.13nm, 0.14nm, 0.15nm or 0.16nm, etc., preferably 0.12-0.14 nm.
Preferably, the thickness ratio of the nanofiber soft surface layer, the nanofiber soft middle layer and the nanofiber soft bottom layer is 1 (3-5) to (2-3), such as 1:3:2, 1:3:3, 1:4:2, 1:4:3, 1:5:2 or 1:5:3, preferably 1:4: 2.
The overall thickness of the nonwoven fabric and the thickness of each fiber layer are critical factors affecting the performance of the product, and when the overall thickness of the nonwoven fabric is within the above numerical range and the thicknesses of the three layers are within the above proportional range, the product can obtain better strength, extensibility and softness.
Preferably, the polypropylene has a melt flow rate of 2 to 6g/10min, such as 2g/10min, 3g/10min, 4g/10min, 5g/10min, or 6g/10min, and the like.
Preferably, the soft master batch comprises the following preparation raw materials in percentage by mass: 80-90% of polypropylene, 3-8% of cationic softener and 5-15% of auxiliary agent.
The soft master batch is a key factor influencing the smoothness degree of the non-woven fabric product, when the soft master batch is applied by the raw material formula, the smoothness degree of the polypropylene fiber can be obviously improved, and meanwhile, the soft master batch can be well matched with the nano elastomer, so that the product has good comprehensive properties in the aspects of softness, strength, extensibility and the like.
The polypropylene may be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90% or the like by mass. Other specific values within the range are not described in detail herein.
The mass percentage of the cationic softener can be 3%, 4%, 5%, 6%, 7%, 8% or the like. Other specific values within the range are not described in detail herein.
The mass percentage of the auxiliary agent can be 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% and the like. Other specific values within the range are not described in detail herein.
Preferably, the preparation method of the soft master batch comprises the following steps: firstly, mixing polypropylene and a cationic softening agent for 10-20min (such as 10min, 12min, 14min, 16min, 18min or 20 min), and then mixing the mixture and an auxiliary agent for 10-20min (such as 10min, 12min, 14min, 16min, 18min or 20 min) to obtain the softening master batch.
The soft master batch related to the invention has a specific preparation method, and the beneficial effects can be obtained only by applying the soft master batch prepared according to the steps to the non-woven fabric.
Preferably, the cationic softening agent comprises any one of or a combination of at least two of monoalkyl dimethyl tertiary amine, dialkyl methyl tertiary amine, trialkyl methyl tertiary amine or dioctadecyl dimethyl ammonium chloride; combinations of the at least two are exemplified by a combination of monoalkyl bis-methyl tertiary amine and dialkyl methyl tertiary amine, a combination of dialkyl methyl tertiary amine and trialkyl methyl tertiary amine, and the like.
Preferably, the adjuvant comprises stearic acid, paraffin wax and an emulsifier.
Preferably, the nanoelastomers comprise ethylene-octene copolymers, which are polyolefin thermoplastic elastomers synthesized using metallocene catalysts.
Preferably, the ethylene-octene copolymer has a number average molecular weight of 107-109Da, e.g. 107Da、5×107Da、108Da、5×108Da or 109Da, etc.
The nano elastomer is a key factor influencing the softness of a non-woven fabric product, and when the nano elastomer is applied by the raw materials, the softness of the polypropylene fiber can be remarkably improved, and meanwhile, the nano elastomer can be well matched with the soft master batch, so that the product has excellent comprehensive performance.
Preferably, the mass ratio of the polypropylene to the soft master batch in the nanofiber soft surface layer is (90-95): 5-10, such as 90:10, 91:9, 92:8, 93:7, 94:6 or 5: 5. Other specific values within the range are not described in detail herein.
Preferably, the mass ratio of the polypropylene to the soft master batch to the nano elastomer in the nano fiber soft intermediate layer is (70-80): 5-10): 15-20, such as 80:5:15, 79:5:16, 78:6:16, 77:8:15, 76:9:15, 75:10:15, 74:10:16, 73:10:17, 72:10:18 or 70:10: 20. Other specific values within the range are not described in detail herein.
Preferably, the mass ratio of the polypropylene, the soft master batch and the nano elastomer in the nano fiber soft bottom layer is (60-70): (15-20): (15-20), such as 70:15:15, 69:15:16, 68:16:16, 67:16:17, 66:17:17, 65:17:18, 64:18:18, 63:18:19, 62:19:19 or 60:20: 20. Other specific values within the range are not described in detail herein.
As mentioned above, the nonwoven fabric according to the present invention includes three stacked nanofiber soft layers with different physical properties, the surface layer has a low degree of softness but a smooth hand feeling, the lower two layers have a greatly increased degree of softness, and a soft and soft effect is achieved, such that the nonwoven fabric with a soft and smooth cotton, high strength and high extensibility is stacked, and such an excellent combination property needs to be combined in different ways through raw materials of each fiber layer.
In a second aspect, the present invention provides a method for preparing the soft and smooth non-woven fabric, the method comprising:
(1) respectively mixing and stirring the raw materials in each nanofiber soft layer according to the mass ratio to obtain three mixtures;
(2) carrying out hole-passing wire extrusion on the three mixtures obtained in the step (1) through a screw extruder respectively to obtain a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer respectively;
(3) and (3) carrying out hot rolling compounding on the nano fiber soft surface layer, the nano fiber soft middle layer and the nano fiber soft bottom layer obtained in the step (2) to obtain the soft and smooth non-woven fabric.
Specifically, the preparation method comprises the following steps: respectively mixing and stirring the raw materials in each nanofiber soft layer according to the mass ratio to obtain three mixtures; and then adjusting relevant process parameters (the temperature of the upper roller, the temperature of the lower roller, the temperature of a die head, the suction amount, the cold air speed and the like), heating, melting, plasticizing and mixing the mixture by a screw extruder, accurately metering the mixture by a metering pump, conveying the mixture to the die head, extruding filaments by passing through holes with uniform melt, cooling the filaments by cooling air, then feeding the filaments into a drafting device, sucking the filaments into the drafting device under the negative pressure action of the drafting device, and forming a cloth cover under the auxiliary action of a suction fan to obtain the nanofiber soft layer. And finally, carrying out hot rolling compounding on the three prepared nano fiber soft layers through two heated rollers to form the soft and smooth non-woven fabric.
Preferably, the die temperature of the screw extruder in the step (2) is 226-232 ℃, such as 226 ℃, 227 ℃, 228 ℃, 229 ℃, 230 ℃, 231 ℃ or 232 ℃ and the like. Other specific values within the range are not described in detail herein.
Preferably, the screw temperature of the screw extruder in the step (2) is 195-. Other specific values within the range are not described in detail herein.
Preferably, the upper roll temperature of the screw extruder in the step (2) is 153-157 ℃, such as 153 ℃, 154 ℃, 155 ℃, 156 ℃ or 157 ℃ and the like, and the lower roll temperature is 149-153 ℃, such as 149 ℃, 150 ℃, 151 ℃, 152 ℃ or 153 ℃ and the like. Other specific values within the range are not described in detail herein.
Preferably, the temperature of the screw extruder in step (2) is 220-. Other specific values within the range are not described in detail herein.
Preferably, the temperature of the small-pressure roller of the screw extruder in the step (2) is 100-. Other specific values within the range are not described in detail herein.
Preferably, when the soft nanofiber surface layer is prepared, the temperature of a small compression roller is 113-115 ℃; when the nanofiber soft middle layer is prepared, the temperature of the small press roll is 104-106 ℃; when the nano-fiber soft bottom layer is prepared, the temperature of the small press roll is 100-102 ℃.
Preferably, the pumping speed in the step (2) is 810-. Other specific values within the range are not described in detail herein.
Preferably, when the nanofiber soft surface layer is prepared, the pumping speed is 810 and 812 revolutions per minute; when the nanofiber soft middle layer is prepared, the pumping speed is 880-882 r/min; when the nano-fiber soft bottom layer is prepared, the pumping speed is 887-.
Preferably, the cold air speed during the via hole extrusion in step (2) is 800-. Other specific values within the range are not described in detail herein.
Preferably, when the soft nanofiber surface layer is prepared, the pumping speed is 800-; when the nano fiber soft middle layer is prepared, the suction speed is 868-871 revolutions/min; when the nanofiber soft bottom layer is prepared, the pumping speed is 878 and 880 revolutions per minute.
Preferably, the line speed of the mesh formation during the via hole extrusion in step (2) is 390-. Other specific values within the range are not described in detail herein.
Preferably, the linear speed of the rolling mill during the via-hole extrusion in step (2) is 395-405 m/min, such as 395 m/min, 396 m/min, 397 m/min, 398 m/min, 400 m/min or 405 m/min. Other specific values within the range are not described in detail herein.
Preferably, the winding linear speed during the via hole extrusion in step (2) is 405-415 m/min, such as 405 m/min, 407 m/min, 408 m/min, 410 m/min, 411 m/min, 412 m/min or 415 m/min. Other specific values within the range are not described in detail herein.
In a further aspect, the invention provides the use of a soft and smooth non-woven fabric as described above in the preparation of a medical and health care product.
Compared with the prior art, the invention has the following beneficial effects:
the non-woven fabric comprises three nano fiber soft layers with different physical properties, wherein the nano fiber soft layers are arranged in a stacked mode, the surface layer is low in softness but smooth in hand feeling, the softness of the lower two layers is greatly increased to achieve a soft and soft effect, the non-woven fabric is stacked into the soft and smooth non-woven fabric, each layer comprises a plurality of nano modified silk soft fibers, the nano modified silk soft fibers are arranged in a staggered mode, and the non-woven fabric further has excellent strength and elongation.
Drawings
FIG. 1 is a schematic structural view of a soft and smooth nonwoven fabric according to the present invention; wherein, 1 is a nano fiber soft surface layer, 2 is a nano fiber soft middle layer, and 3 is a nano fiber soft bottom layer.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following further describes the technical solution of the present invention with reference to the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.
Example 1
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The soft surface layer of the nano-fiber contains polypropylene and soft master batch with the mass ratio of 93: 7; the nano-fiber soft middle layer contains the following components in percentage by mass77:8:15 of polypropylene, soft master batch and nano elastomer; the nano-fiber soft bottom layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 70:15: 15. Wherein the nano elastomer is ethylene-octene copolymer (molecular weight 10)8Da); the melt flow rate of the polypropylene is 4g/10 min; the softening master batch comprises 85% of polypropylene (with a melt flow rate of 4g/10min), 5% of cationic softening agent (dodecyl dimethyl tertiary amine), 3% of stearic acid, 2% of paraffin and 5% of emulsifier (Tween 80) in percentage by mass. The thickness ratio of the nano-fiber soft surface layer to the nano-fiber soft middle layer to the nano-fiber soft bottom layer is 1:4:2, and the total thickness is 0.13 nm.
The preparation method comprises the following steps:
(1) respectively mixing and stirring the raw materials in each nanofiber soft layer according to the mass ratio to obtain three mixtures;
(2) carrying out hole-passing filament extrusion on the three obtained mixtures respectively through a screw extruder to respectively obtain a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer; the technological parameters of the through-hole wire extrusion are shown in table 1 (in the table, S1, S2 and S3 respectively represent the technological parameters for preparing the nanofiber soft surface layer, the nanofiber soft middle layer and the nanofiber soft bottom layer);
(3) and carrying out hot rolling compounding on the obtained nanofiber soft surface layer, the nanofiber soft middle layer and the nanofiber soft bottom layer to obtain the soft and smooth non-woven fabric.
TABLE 1
Example 2
The present embodiment providesA soft and smooth non-woven fabric comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially overlapped. The nano-fiber soft surface layer contains polypropylene and soft master batch in a mass ratio of 90: 10; the nano-fiber soft middle layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 70:10: 20; the nano-fiber soft bottom layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 60:20: 20. Wherein the nano elastomer is ethylene-octene copolymer (molecular weight 10)8Da); the melt flow rate of the polypropylene is 3g/10 min; the softening master batch comprises 80 mass percent of polypropylene (with the melt flow rate of 3g/10min), 5 mass percent of cationic softening agent (didodecyl methyl tertiary amine), 5 mass percent of stearic acid, 5 mass percent of paraffin and 5 mass percent of emulsifier (span 80). The thickness ratio of the nano-fiber soft surface layer to the nano-fiber soft middle layer to the nano-fiber soft bottom layer is 1:3:2, and the total thickness is 0.12 nm.
The preparation process is as in example 1.
Example 3
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The soft surface layer of the nano-fiber contains polypropylene and soft master batch with the mass ratio of 95: 5; the nano-fiber soft middle layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 80:5: 15; the nano-fiber soft bottom layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 70:15: 15. Wherein the nano elastomer is ethylene-octene copolymer (molecular weight 10)8Da); the melt flow rate of the polypropylene is 5g/10 min; the softening master batch comprises 90% of polypropylene (with a melt flow rate of 5g/10min), 5% of cationic softening agent (didodecyl methyl tertiary amine), 1% of stearic acid, 1% of paraffin and 3% of emulsifier (span 80) in percentage by mass. The thickness ratio of the nano-fiber soft surface layer to the nano-fiber soft middle layer to the nano-fiber soft bottom layer is 1:5:3, and the total thickness is 0.14 nm.
The preparation process is as in example 1.
Example 4
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The nano-fiber soft surface layer contains polypropylene and soft master batch in a mass ratio of 92: 8; the nano-fiber soft middle layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 72:8: 20; the nanofiber soft bottom layer contains polypropylene, soft master batches and nano elastomers in a mass ratio of 66:14: 20. Wherein the nano elastomer is ethylene-octene copolymer (molecular weight 10)8Da); the melt flow rate of the polypropylene is 5g/10 min; the softening master batch comprises 90% of polypropylene (with a melt flow rate of 5g/10min), 5% of cationic softening agent (didodecyl methyl tertiary amine), 1% of stearic acid, 1% of paraffin and 3% of emulsifier (Tween 80) in percentage by mass. The thickness ratio of the nano-fiber soft surface layer to the nano-fiber soft middle layer to the nano-fiber soft bottom layer is 1:3:3, and the total thickness is 0.13 nm.
The preparation process is as in example 1.
Example 5
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The soft surface layer of the nano-fiber contains polypropylene and soft master batch with the mass ratio of 94: 6; the nanofiber soft middle layer contains polypropylene, soft master batches and nano elastomers in a mass ratio of 75:8: 17; the nano-fiber soft bottom layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 65:17: 18. Wherein the nano elastomer is ethylene-octene copolymer (molecular weight 10)8Da); the melt flow rate of the polypropylene is 4g/10 min; the softening master batch comprises 90% of polypropylene (melt flow rate of 4g/10min), 5% of cationic softening agent (dodecyl dimethyl tertiary amine), 1% of stearic acid, 1% of paraffin and 3% of emulsifier (Tween 80) in percentage by mass. The thickness ratio of the nano-fiber soft surface layer to the nano-fiber soft middle layer to the nano-fiber soft bottom layer is 1:4:3, and the total thickness is 0.13 nm.
The preparation process is as in example 1.
Example 6
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The structural composition of the non-woven fabric is different from that of the non-woven fabric in example 1 only in that the thickness ratio of the nanofiber soft surface layer to the nanofiber soft middle layer to the nanofiber soft bottom layer is 1:1:1, and the rest parts are consistent.
The preparation process is as in example 1.
Example 7
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The structural composition of the non-woven fabric is different from that of the non-woven fabric in the embodiment 1 only in that the nano fiber soft surface layer contains polypropylene and soft master batch with the mass ratio of 93: 7; the nano-fiber soft middle layer contains polypropylene, soft master batch and nano-elastomer in a mass ratio of 77:8: 15; the soft bottom layer of the nano-fiber contains polypropylene, soft master batch and nano-elastomer with the mass ratio of 77:8:15, and the rest are kept consistent.
The preparation process is as in example 1.
Example 8
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The structural composition of the non-woven fabric is different from that of the non-woven fabric in example 1 only in that the soft surface layer of the nano fibers contains polypropylene and soft master batch with the mass ratio of 93: 7; the nano-fiber soft middle layer contains polypropylene and soft master batch in a mass ratio of 77: 23; the soft bottom layer of the nano-fiber contains polypropylene and soft master batch with the mass ratio of 70:30, and the others are consistent.
The preparation process is as in example 1.
Example 9
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The structural composition of the non-woven fabric is different from that of the non-woven fabric in example 1 only in that the soft surface layer of the nano fibers contains polypropylene and soft master batch with the mass ratio of 93: 7; the nanofiber soft middle layer contains polypropylene and a nano elastomer in a mass ratio of 77: 23; the nanofiber soft bottom layer contains polypropylene and a nano elastomer in a mass ratio of 70:30, and the rest parts are consistent.
The preparation process is as in example 1.
Example 10
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked. The structural composition of the nonwoven fabric differs from that of example 1 only in that "the softening master batch does not contain the cationic softening agent", and the others are consistent.
The preparation process is as in example 1.
Comparative example 1
The embodiment provides a soft and smooth non-woven fabric, which comprises a nanofiber soft surface layer and a nanofiber soft bottom layer which are sequentially overlapped. The structural composition of the nanofiber soft surface layer and the nanofiber soft bottom layer are consistent with those of embodiment 1, and other parameters are also consistent.
The preparation process is as in example 1.
Evaluation test:
the nonwoven fabric products prepared in examples 1 to 10 and comparative example 1 were respectively tested for their performance indexes by the following methods:
(1) gram weight: FZ/T60004-;
(2) strength: GB/T24218.3-2010;
(3) elongation: GB/T24218.3-2010;
(4) softness: GB/T8942-2002;
(5) thickness: FZ/T60004-;
(6) pH value: GB/T7573-2009.
The test results are shown in table 1:
TABLE 1
As can be seen from the data in Table 1: the soft and smooth non-woven fabric has excellent strength, extensibility and softness, and the three-layer nanofiber soft layer has better performance than the two-layer nanofiber soft layer; the thickness relationship of the three layers and the formulation of each layer can affect the above properties of the product.
The applicant states that the present invention is illustrated by the above examples to a soft and smooth nonwoven fabric and its preparation method and application, but the present invention is not limited to the above examples, i.e. it does not mean that the present invention must be implemented by the above examples. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
Claims (10)
1. The soft and smooth non-woven fabric is characterized by comprising a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer which are sequentially stacked.
2. The soft and smooth nonwoven fabric of claim 1 wherein the nanofiber soft skin comprises polypropylene and soft masterbatches; the nanofiber soft middle layer comprises polypropylene, soft master batches and a nano elastomer; the nanofiber soft bottom layer comprises polypropylene, soft master batches and a nano elastomer.
3. The soft and smooth nonwoven as claimed in claim 1 or 2, wherein the thickness of the soft and smooth nonwoven is 0.10 to 0.16nm, preferably 0.12 to 0.14 nm;
preferably, the thickness ratio of the nanofiber soft surface layer to the nanofiber soft middle layer to the nanofiber soft bottom layer is 1 (3-5) to (2-3), and preferably 1:4: 2.
4. The soft and smooth nonwoven fabric of claim 2 or 3, wherein the polypropylene has a melt flow rate of 2 to 6g/10 min;
preferably, the soft master batch comprises the following preparation raw materials in percentage by mass: 80-90% of polypropylene, 3-8% of cationic softener and 5-15% of auxiliary agent;
preferably, the preparation method of the soft master batch comprises the following steps: mixing polypropylene and a cationic softening agent for 10-20min, and mixing the mixture and an auxiliary agent for 10-20min to obtain the softening master batch;
preferably, the cationic softening agent comprises any one of or a combination of at least two of monoalkyl dimethyl tertiary amine, dialkyl methyl tertiary amine, trialkyl methyl tertiary amine or dioctadecyl dimethyl ammonium chloride;
preferably, the adjuvant comprises stearic acid, paraffin wax and an emulsifier.
5. The soft and smooth nonwoven fabric of any of claims 2-4, wherein the nanoelastomers comprise ethylene-octene copolymers;
preferably, the ethylene-octene copolymer has a number average molecular weight of 107-109Da。
6. The soft and smooth nonwoven fabric of any of claims 2-5, wherein the mass ratio of polypropylene to the soft masterbatch in the soft surface layer of nanofibers is (90-95): 5-10;
preferably, the mass ratio of the polypropylene, the soft master batch and the nano elastomer in the nano fiber soft middle layer is (70-80): (5-10): (15-20);
preferably, the mass ratio of the polypropylene, the soft master batch and the nano elastomer in the nano fiber soft bottom layer is (60-70): (15-20).
7. The method of producing a soft and smooth nonwoven fabric according to any of claims 1 to 6, wherein the method of producing comprises:
(1) respectively mixing and stirring the raw materials in each nanofiber soft layer according to the mass ratio to obtain three mixtures;
(2) carrying out hole-passing wire extrusion on the three mixtures obtained in the step (1) through a screw extruder respectively to obtain a nanofiber soft surface layer, a nanofiber soft middle layer and a nanofiber soft bottom layer respectively;
(3) and (3) carrying out hot rolling compounding on the nano fiber soft surface layer, the nano fiber soft middle layer and the nano fiber soft bottom layer obtained in the step (2) to obtain the soft and smooth non-woven fabric.
8. The method of claim 7, wherein the temperature of the die head of the screw extruder in the step (2) is 226-232 ℃;
preferably, the screw temperature of the screw extruder in the step (2) is 195-230 ℃;
preferably, the upper roll temperature of the screw extruder in the step (2) is 153-157 ℃, and the lower roll temperature is 149-153 ℃;
preferably, the pipe temperature of the screw extruder in the step (2) is 220-230 ℃;
preferably, the temperature of the small pressure roller of the screw extruder in the step (2) is 100-115 ℃.
9. The method according to claim 7 or 8, wherein the suction speed during the step (2) of extruding through holes is 810-;
preferably, the cold air speed during the hole-passing wire extrusion in the step (2) is 800-;
preferably, the line speed of the net formation during the via hole extrusion in the step (2) is 390 and 400 m/min;
preferably, the linear speed of the rolling mill during the via-hole extruding in the step (2) is 395-405 m/min;
preferably, the winding linear speed during the via hole extruding in the step (2) is 405-415 m/min.
10. Use of a soft and smooth nonwoven fabric according to any one of claims 1 to 6 for the preparation of a medical care product.
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