CN107761254A - Elastic non-woven cloth and its preparation method and application - Google Patents
Elastic non-woven cloth and its preparation method and application Download PDFInfo
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- CN107761254A CN107761254A CN201711032330.9A CN201711032330A CN107761254A CN 107761254 A CN107761254 A CN 107761254A CN 201711032330 A CN201711032330 A CN 201711032330A CN 107761254 A CN107761254 A CN 107761254A
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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
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- 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
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention provides a kind of elastic non-woven cloth, including the first spunbond layer, resilient middle layer and the second spunbond layer stacked gradually；The surface density of the elastic non-woven cloth is 35 150g/m2, cross directional stretch 5.9 67.1N/50mm of strength, longitudinal stretching 19.7 174.1N/50mm of strength, transverse breakage elongation 255.0% 600.0%, longitudinal elongation at break rate 69.0% 397.0%.Present invention also offers the preparation method of the non-woven fabrics, including：Prepare spunbond layer fibre web；Prepare elastic layer fibre web；Using elastic layer fibre web as resilient middle layer, using spunbond layer fibre web as the first spunbond layer and the second spunbond layer, heat pressure adhesive is carried out.The elastic non-woven cloth of the present invention has fabulous elasticity, available for preparing medical material.
Description
Technical field
The invention belongs to field of nonwoven fabric technology, in particular it relates to a kind of activation type elastic non-woven cloth and its system
Preparation Method and application.
Background technology
Non-woven fabrics (Non Woven Fabric or Nonwoven cloth), also known as adhesive-bonded fabric, by orientation or random fibre
Dimension is formed, and is environment-friendly materials of new generation.Non-woven fabrics has moistureproof, ventilative, flexible, light, easy decomposition and nontoxic nonirritant etc.
Feature, thus it is used for medical treatment, health cloth by more and more extensive.But due to the specific use of medical and health, it is past
It is past to need non-woven fabrics to possess certain elasticity.
The Chinese invention patent application of Application No. 201610635097.2 discloses a kind of elastic force compound nonwoven cloth, including
The non-woven fabrics matrix of outermost elastic layer, the polyvinyl chloride resin layer in intermediate layer and internal layer；Wherein, elastic layer is by polyurethane
Ester fiber is interwoven, and non-woven fabrics matrix is formed by polypropylene fiber and chitosan fiber composite, in nonwoven fabric base body uniformly
It is disposed with several air-vents.
The Chinese invention patent application of Application No. 201710257388.7 discloses a kind of simple tension elastic non-woven cloth,
The first elastic fabric (1), silk/yarn/line including stacking gradually lay layer (2) and the second elastic fabric (3)；Wherein, silk/
Yarn/line, which lays layer (2), includes multi-filament/yarn/line (21), and each silk/yarn/line (21) is arranged in parallel to be laid and be equidistantly spaced from, often
A piece silk/yarn/line (21) is clipped in elastic webs/inelastic nonwoven layer (1) and elastic webs/inelastic nonwoven layer (3)
Between.
Although the compound nonwoven cloth disclosed in above-mentioned patent application document can improve elasticity, because elastic layer is set
In the outer layer of compound nonwoven cloth so that its production and using when easily deform upon, production winding is difficult and use was both inconvenient.
The content of the invention
The goal of the invention of the present invention is the defects of being directed to prior art, there is provided a kind of elastic non-woven cloth and preparation method thereof
And application.
On the one hand, the invention provides a kind of elastic non-woven cloth, the elastic non-woven cloth includes the first spinning stacked gradually
Adhesion coating, resilient middle layer and the second spunbond layer；The surface density of the elastic non-woven cloth is 35-150g/m2, cross directional stretch strength
5.9-67.1N/50mm longitudinal stretching strength 19.7-174.1N/50mm, transverse breakage elongation 255.0%-600.0%, indulge
To elongation at break 69.0%-397.0%.
On the other hand, the invention provides a kind of preparation method of elastic non-woven cloth, comprise the following steps：
(1) preparation of spunbond layer fibre web：Spunbond layer raw material including soft master batch and polypropylene chip is mixed, squeezed
Pressure melting, spinning and sub-wire lapping, obtain spunbond layer fibre web；
(2) preparation of elastic layer fibre web：Elastic layer raw material including elastomer, smooth master batch and polypropylene chip is carried out
Mixing, extrusion molten, spinning and sub-wire lapping, obtain elastic layer fibre web；
(3) bond：Using elastic layer fibre web as resilient middle layer, using spunbond layer fibre web as the first spunbond layer and the second spunbond
Layer, by three layers of fibre web heat pressure adhesive, obtains elastic non-woven cloth.
On the other hand, the purposes the invention provides elastic non-woven cloth in medical material is prepared.
The present invention has the advantages that：
The present invention elastic non-woven cloth be activation type elastic non-woven cloth, i.e. the non-woven fabrics do not pull it is nonelastic, to the nonwoven
It is just flexible after cloth progress is stretch activated.The elastic non-woven cloth of the present invention is nonelastic when not activating, and is easy to produce and uses.This
Outside, the more conventional product elastic effect of elastic non-woven cloth of the invention is more preferable, is not easily broken, more solid.
Embodiment
In order to be fully understood by the purpose of the present invention, feature and effect, by following embodiments, the present invention is made detailed
Describe in detail bright.For the process of the present invention in addition to the description below, remaining uses the conventional method or device of this area.Following nouns
Term is unless otherwise stated, be respectively provided with the implication that those skilled in the art are generally understood that.
Existing elastic non-woven cloth product generally existing elastic effect is not good enough, through pulling the defects of being easily torn, Wu Faman
The presently relevant field (such as medical material field) of foot is to the elasticity of non-woven cloth products and the requirement of intensity.In addition, in life
During production and use, because of elastic reaction, machine run can cause elastic non-woven cloth product deformation during upper machine, and production winding is tired
Difficulty, use are also extremely inconvenient.These problems all seriously constrain the development of non-woven fabrics industry.
In view of the above-mentioned problems, the first aspect of the present invention provides a kind of elastic non-woven cloth, the elastic non-woven cloth includes
The first spunbond layer, resilient middle layer and the second spunbond layer stacked gradually；The surface density of the elastic non-woven cloth is 35-150g/
m2, strength CD (cross directional stretch strength) 5.9-67.1N/50mm, strength MD (longitudinal stretching strength) 19.7-174.1N/50mm, stretch
Long rate CD (transverse breakage elongation) 255.0%-600.0%, elongation MD (longitudinal elongation at break rate) 69.0%-397.0%.
Preferably, first spunbond layer and second spunbond layer account for the 15%-20% of the elastic non-woven cloth weight respectively.
Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth is 7.43-28.89N, for the first time
Retraction force is 4.1-16.4N, and 50% retraction force is 0.2-1.0N for the first time, and first time deformation rate is 24%-33%, second of drawing
Stretch is 6.7-25.4N, and second of retraction force is 4.1-16.4N, and second of 50% retraction force is 0.2-1.0N, second of deformation
Rate is 28%-35%.
Along MD directions, i.e. longitudinal direction, the first time tensile force of the elastic non-woven cloth is 15.44-73.73N, for the first time
Retraction force is 8.4-39.8N, and 50% retraction force is 0.2-1.3N for the first time, and first time deformation rate is 27%-42%, second of drawing
Stretch is 14.1-66.3N, and second of retraction force is 8.4-39.8N, and second of 50% retraction force is 0.2-1.3N, second of change
Form quotient is 30%-44%.
In a kind of preferred embodiment, the invention provides a kind of activation type elastic non-woven cloth of 35 grammes per square metre.
Surface density is 32.1-36.2g/m2, strength CD (cross directional stretch strength) 10.7-15.3N/50mm, (longitudinal stretching is strong by strength MD
Power) 19.7-34.7N/50mm, elongation CD (transverse breakage elongation) 255.0%-353.0%, elongation MD (longitudinal fractures
Elongation) 256.0%-365.0%.Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth is
7.08-8.01N, first time retraction force are 3.9-4.4N, and 50% retraction force is 0.2N for the first time, and first time deformation rate is 22%-
28%, second of tensile force is 6.3-7.3N, and second of retraction force is 3.9-4.4N, and second of 50% retraction force is 0.2N, the
Secondary deformation rate is 26%-31%.Along MD directions, i.e. longitudinal direction, the first time tensile force of the elastic non-woven cloth is
13.57-17.02N, first time retraction force are 7.3-9.2N, and 50% retraction force is 0.2N for the first time, and first time deformation rate is
24%-29%, second of tensile force are 12.5-15.3N, and second of retraction force is 7.3-9.2N, and second of 50% retraction force is
0.2N, second of deformation rate are 27%-33%.
In another preferred embodiment, the invention provides a kind of activation type elastomeric nonwoven of 45 grammes per square metre
Cloth.Surface density is 41.3-59.7g/m2, strength CD (cross directional stretch strength) 12.2-15.0N/50mm, strength MD (longitudinal stretchings
(longitudinal direction is disconnected by strongly) 48.1-80.6N/50mm, elongation CD (transverse breakage elongation) 435.0%-600.0%, elongation MD
Split elongation) 148.0%-193.0%.Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth is
8.01-11.47N, first time retraction force are 4.4-6.2N, and 50% retraction force is 0.2-0.3N for the first time, and first time deformation rate is
28%-32%, second of tensile force are 7.3-10.3N, and second of retraction force is 4.4-6.2N, and second of 50% retraction force is
0.2-0.3N, second of deformation rate are 31%-35%.Along MD directions, i.e. longitudinal direction, the first time of the elastic non-woven cloth draws
Stretch is 19.12-21.40N, and first time retraction force is 10.3-11.3N, and 50% retraction force is 0.4-0.5N for the first time, for the first time
Deformation rate is 27%-32%, and second of tensile force is 17.4-19.5N, and second of retraction force is 10.3-11.3N, second
50% retraction force is 0.4N, and second of deformation rate is 30%-34%.
In another preferred embodiment, the invention provides a kind of activation type elastomeric nonwoven of 70 grammes per square metre
Cloth.Surface density is 66.2-80.5g/m2, strength CD (cross directional stretch strength) 26.3-34.8N/50mm, strength MD (longitudinal stretchings
(longitudinal direction is disconnected by strongly) 92.8-106.5N/50mm, elongation CD (transverse breakage elongation) 301.0%-448.0%, elongation MD
Split elongation) 197.0%-238.0%.Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth is
16.56-17.14N, first time retraction force are 9.2-9.4N, and 50% retraction force is 0.5N for the first time, and first time deformation rate is
31%-33%, second of tensile force are 14.8-15.3N, and second of retraction force is 9.2-9.4N, and second of 50% retraction force is
0.5N, second of deformation rate are 33%-35%.Along MD directions, i.e. longitudinal direction, the first time tensile force of the elastic non-woven cloth
It is 25.99-34.01N, first time retraction force is 14.2-18.3N, and 50% retraction force is 0.5-0.6N for the first time, is deformed for the first time
Rate is 29%-33%, and second of tensile force is 23.7-31.0N, and second of retraction force is 14.2-18.3N, second 50% time
Contracting power is 0.5-0.6N, and second of deformation rate is 32%-37%.
In another preferred embodiment, the invention provides a kind of activation type elastomeric nonwoven of 90 grammes per square metre
Cloth.Surface density is 82.7-97.5g/m2, strength CD (cross directional stretch strength) 39.8-52.7N/50mm, strength MD (longitudinal stretchings
(longitudinal direction is disconnected by strongly) 91.6-110.8N/50mm, elongation CD (transverse breakage elongation) 355.0%-401.0%, elongation MD
Split elongation) 315.0%-355.0%.Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth is
20.91-22.77N, first time retraction force are 11.8-12.8N, and 50% retraction force is 0.5-0.6N for the first time, first time deformation rate
It is 32%-34%, second of tensile force is 18.8-20.2N, and second of retraction force is 11.8-12.8N, second 50% retraction
Power is 0.5-0.6N, and second of deformation rate is 33%-37%.Along MD directions, i.e. longitudinal direction, the first of the elastic non-woven cloth
Secondary tensile force is 35.70-36.16N, and first time retraction force is 19.5-20.5N, and 50% retraction force is 0.5-0.9N for the first time, the
Deformation rate is 35%-46%, and second of tensile force is 32.5-32.6N, and second of retraction force is 19.5-20.5N, second
Secondary 50% retraction force is 0.5-0.9N, and second of deformation rate is 37%-48%.
In another preferred embodiment, the invention provides a kind of activation type elastomeric nonwoven of 120 grammes per square metre
Cloth.Surface density is 104.8-124.5g/m2, strength CD (cross directional stretch strength) 51.7-57.7N/50mm, strength MD (longitudinal direction drawing
Stretching strength) 111.6-141.3N/50mm, elongation CD (transverse breakage elongation) 364.0%-426.0%, elongation MD be (vertical
To elongation at break) 314.0%-397.0%.Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth
It is 24.81-25.97N, first time retraction force is 13.8-14.4N, and 50% retraction force is 0.7-0.8N for the first time, is deformed for the first time
Rate is 30%-32%, and second of tensile force is 22.0-23.0N, and second of retraction force is 13.8-14.4N, second 50% time
Contracting power is 0.7-0.8N, and second of deformation rate is 32%-35%.Along MD directions, i.e. longitudinal direction, the of the elastic non-woven cloth
One-off drawing power is 48.56-55.74N, and first time retraction force is 27.0-30.0N, and 50% retraction force is 0.5-1.0N for the first time,
First time deformation rate is 35%-48%, and second of tensile force is 44.5-50.7N, and second of retraction force is 27.0-30.0N, the
Secondary 50% retraction force is 0.5-1.0N, and second of deformation rate is 38%-50%.
In another preferred embodiment, the invention provides a kind of activation type elastomeric nonwoven of 150 grammes per square metre
Cloth.Surface density is 146.2-161.6g/m2, strength CD (cross directional stretch strength) 59.5-67.1N/50mm, strength MD (longitudinal direction drawing
Stretching strength) 152.7-174.1N/50mm, elongation CD (transverse breakage elongation) 364.0%-402.0%, elongation MD be (vertical
To elongation at break) 320.0%-382.0%.Along CD directions, i.e. horizontal direction, the first time tensile force of the elastic non-woven cloth
It is 27.32-29.86N, first time retraction force is 15.5-17.0N, and 50% retraction force is 0.8-1.0N for the first time, is deformed for the first time
Rate is 26%-31%, and second of tensile force is 24.0-26.3N, and second of retraction force is 15.5-17.0N, second 50% time
Contracting power is 0.8-1.0N, and second of deformation rate is 29%-33%.Along MD directions, i.e. longitudinal direction, the of the elastic non-woven cloth
One-off drawing power is 70.77-78.47N, and first time retraction force is 38.5-42.0N, and 50% retraction force is 1.0-1.5N for the first time,
First time deformation rate is 33%-42%, and second of tensile force is 64.0-69.8N, and second of retraction force is 38.5-42.0N, the
Secondary 50% retraction force is 1.0-1.5N, and second of deformation rate is 37%-44%.
In the present invention, first time tensile force, second of tensile force, first time retraction force, second of retraction force, first time
50% retraction force, second of 50% retraction force, first time deformation rate, second of deformation rate are all for characterizing non-woven fabrics elasticity
, specific determination mode is shown in embodiment.Wherein, first time tensile force and second of tensile force are more small better, for the first time
Retraction force, for the first time second of retraction force, 50% retraction force and second of 50% retraction force are all that bigger elasticity is better, for the first time
Deformation rate and second of deformation rate are more small better.
The present invention elastic non-woven cloth be activation type elastic non-woven cloth, it is, the elastic non-woven cloth do not pull it is nonelastic,
It is just flexible after stretch activated to elastic non-woven cloth progress, activated particular by the speed difference of draw roll, such as nothing
Cloth is spun through more traction draw rolls, by speed difference to one power of non-woven fabrics so as to be activated.
The elastic non-woven cloth of the present invention is for two layers spunbond layer (i.e. the first spunbond layer and the second spunbond layer) up and down, intermediate layer
For elastic layer.On the one hand, because both sides are spunbond layers, thus the present invention elastic non-woven cloth do not pull it is nonelastic, production and
During preservation, will not adhesion, be easy to cut, and easily winding, because of bullet when effectively prevent the production of pure Resilient product and using
Property caused by effect during upper machine machine run cause its deformation, production winding it is difficult, using it is extremely inconvenient the problems such as.The opposing party
Face, upper and lower two layers of spunbond layer are thin spunbond layer (15%-20% for accounting for the elastic non-woven cloth weight respectively), are easy to pull sharp
It is living, but be not easily broken, so that the elastic non-woven cloth intensity of the present invention is higher, durable, and due to resilient middle layer
It is more preferable in the presence of elastic effect after causing activation.
The second aspect of the present invention provides a kind of preparation method of elastic non-woven cloth.Above-mentioned swash in order to prepare
Live-in elastic non-woven cloth, inventor are improved the raw material of spunbond layer and resilient middle layer.Wherein, the first spunbond layer and
Two spunbond layers use the spunbond layer raw material being made up of soft master batch and polypropylene chip to be prepared, and resilient middle layer is used by bullet
Property the elastic layer raw material that forms of body, smooth master batch and polypropylene chip prepared.
In spunbond layer raw material, soft master batch accounts for the 1%-5% of spunbond layer raw material gross weight, preferably 2%-4%, more preferably
3%.Soft master batch includes polypropylene homopolymer 46-50 parts by weight, fatty acid amide 22-27 parts by weight, polyvinyl alcohol 25-30 weight
Part and phosphite antioxidant 1-2 parts by weight；Preferably, soft master batch includes the parts by weight of polypropylene homopolymer 47, fatty acyl
The parts by weight of amine 26, the parts by weight of polyvinyl alcohol 26 and the parts by weight of phosphite antioxidant 1.The soft master batch of the present invention is to preparation side
Method has no particular/special requirement, and those skilled in the art are prepared using conventional method, such as raw material is mixed in high-speed mixer
After conjunction, melt blending is carried out using double screw extruder, then by the shearing of screw rod, tie rod pelletizing, drying, packaging etc., i.e.,
It can be made.Generally, the soft master batch of the present invention can be prepared according to following Characteristics of physical parameters：Cylindrical granulate, particle weight
For 68-88 grains/gram, 230 DEG C of melt index be 1000-2000g/10min, bulk density 50-65g/100ml.Alternatively, this hair
The soft master batch of bright use can also use commercially available prod, for example, GA530M of the purchase from Foshan Bao Le companies.
In elastic layer raw material, polypropylene chip accounts for the 1%-5% of elastic layer raw material gross weight, preferably 2%-4%, more excellent
Select 3%.Smooth master batch accounts for the 1%-5% of elastic layer raw material gross weight, preferably 2%-4%, more preferably 3%.Smooth master batch includes
Polypropylene homopolymer 43-48 parts by weight, fatty acid amide 28-31 parts by weight, polyvinylpyrrolidone 20-24 parts by weight and phosphorous acid
Ester antioxidant 3-5 parts by weight；Preferably, smooth master batch includes the parts by weight of polypropylene homopolymer 45.5, the weight of fatty acid amide 28.5
Measure part, the parts by weight of polyvinylpyrrolidone 23 and the parts by weight of phosphite antioxidant 3.The smooth master batch of the present invention is to preparation side
Method has no particular/special requirement, and those skilled in the art are prepared using conventional method, such as raw material is mixed in high-speed mixer
After conjunction, melt blending is carried out using double screw extruder, then by the shearing of screw rod, tie rod pelletizing, drying, packaging etc., i.e.,
It can be made.Generally, the smooth master batch of the present invention can be prepared according to following Characteristics of physical parameters：Cylindrical granulate, particle weight
For 68-88 grains/gram, 230 DEG C of melt index be 500-1100g/10min, bulk density 50-65g/100ml.Alternatively, this hair
The smooth master batch of bright use can also use commercially available prod, for example, HS560 of the purchase from Foshan Bao Le companies.
In the present invention, polypropylene chip is convenient source, and its formula isMean molecule quantity is 200
000 to 600 000, it is usually that routine is purchased in market, for example, the model PP3155E5 of Exxon Mobil Corporation acrylic resin,
The trade mark of PetroChina Company Ltd.'s production is " the Kunlun ", model H39S-2 acrylic resin, Huo Zhezhong
The model PPH-Y35X of petrochemical industry limited company of state Luoyang Company production acrylic resin, is used equally for this hair
In bright.
In the present invention, elastomer is polymerize by the repeated monomer of isotactic polypropylene with what the ethene of random distribution formed
Thing, the wherein elastomer include the ethene of 10wt%-20wt% random distribution.The mean molecule quantity of the elastomer is 300000
To 800000, molecular weight distribution is 3-4, and melt index (230 DEG C, 2.16kg) is 20g/10min-48g/10min.In actual life
In production, those skilled in the art's related parameter values as needed can prepare elastomer using typical polymerization methods.It is optional
Ground, elastomer can also use commercially available prod, for example, U.S. of Weida 6202FL of Exxon Mobil Corporation's sale, U.S. of Weida
7050FL.Melt index uses ASTM D1238 standards in the present invention.
In the present invention, for convenient source, its formula is the polypropylene homopolymer used in soft master batch and smooth master batchMean molecule quantity is 200000 to 600000, is usually conventional purchased in market, for example, the type of Exxon Mobil Corporation
Number be PP3155E5 acrylic resin.Fatty acid amide can be erucyl amide, lauramide, oleamide and stearic amide
In any one or more, be usually conventional purchased in market, such as commercially available from Changsha Chemical Co., Ltd. of Hengchang.Polyethylene
Alcohol is pharmaceutical grade Polyethylene alcohol, and it is different from the other polyvinyl alcohol of chemical grade, is a kind of high polymer substance of security, right
Human body is nontoxic, have no side effect and has good biocompatibility, wherein so-called pharmaceutical grade (or making medical) is basis《China
Pharmacopeia》For version standard in 2015 come what is defined, the pharmaceutical grade Polyethylene alcohol that the present invention uses is usually conventional purchased in market, such as commercially available
From Xi'an Yue Lai Pharmaceutical Technology Co., Ltd.Phosphite antioxidant is one kind of antioxidant, by decomposing in oxidizing process
The stable nonactive product of caused peroxide generation, so as to delay the oxidizing process of high polymer material, extends product and uses
Life-span, generally by acquisition phosphite antioxidant purchased in market in the present invention, such as the Chemical Co., Ltd. of Guangzhou will one3010 series.Polyvinylpyrrolidone is by acquisition purchased in market, such as can purchase from the limited public affairs of Jiangyin Jia Feng chemical industry
Department.
The preparation method provided below second aspect of the present invention is described in detail.
(1) preparation of spunbond layer fibre web
Above-mentioned spunbond layer raw material is added separately in S1 and S3 die heads.The raw material mixed is true by feed system
Sky is drawn into screw extruder, is carried out extrusion molten under conditions of being 180 DEG C -270 DEG C in screw rod melting temperature, is heated
Body.Then, under conditions of operation temperature is 230-250 DEG C, pressure is 5-10MPa, hot melt passes through filtration system and metering
Pump is filtered, measured and distributed.The hot melt distributed sprays silk by the spinneret that aperture is 0.3-0.8mm, through excess temperature
The side cold front heavy rain system for being 0.2-1.5m/s for 10-20 DEG C, wind speed is spent to be cooled down so as to obtain just growing filament.First growing filament
By the method for air-flow sub-wire, by the horn mouth of extension apparatus (narrow formula), using draft speed as 2000m/min-5000m/min
Air drawing obtain the fibers of 1.8-2.2 Denier fiber numbers, while the first growing filament strand marshalling Jing Guo drawing-off, produce
Raw strength, forms fiber.
(2) preparation of elastic layer fibre web
Above-mentioned elastic layer raw material is added in S2 die heads.The raw material mixed is vacuum-drawn against by feed system
In screw extruder, extrusion molten is carried out under conditions of being 180 DEG C -270 DEG C in screw rod melting temperature, obtains hot melt.Then,
Under conditions of operation temperature is 230-250 DEG C, pressure is 5-10MPa, hot melt was carried out by filtration system and measuring pump
Filter, metering and distribution.The hot melt distributed sprays silk by the spinneret that aperture is 0.3-0.8mm, is 10-20 through excess temperature
DEG C, wind speed be 0.2-1.5m/s side cold front heavy rain system cooled down so as to obtain just growing filament.First growing filament passes through air-flow
The method of sub-wire, by the horn mouth of extension apparatus (narrow formula), the air-flow using draft speed as 2000m/min-5000m/min is led
The fiber for obtaining 1.8-2.2 Denier fiber numbers, while the first growing filament strand marshalling Jing Guo drawing-off are stretched, produces strength,
Form fiber.
(3) heat pressure adhesive
In step (1) sub-wire obtain fiber be taped against on networking curtain, into lace curtaining under have air exhauster, pass through downward suction
Wind, fiber is fixed on on lace curtaining and forms lower floor's (the first spunbond layer).Then, the fiber that step (2) sub-wire obtains is taped against into
On lace curtaining, by the suction air that air exhauster is downward, fiber is fixed on on lace curtaining and forms resilient middle layer, then according to formation
The method of lower floor re-forms one layer of fibre web as upper strata (the second spunbond layer) on the intermediate layer.Drive of the three layers of fibre web in lace curtaining roller
Under be transferred to hot-rolling mill, hot-rolling mill temperature be set to 130-150 DEG C, line pressure be set to 30-70MPa, three layers of fibre web are on hot-rolling mill
Non-woven fabrics is formed under the effect of the heat pressure adhesive of roll and bottom roll.
In order to realize that the first spunbond layer and the second spunbond layer account for the 15%-20% of elastic non-woven cloth weight respectively, in step
(1) it is that the hot melt of spunbond layer raw material passes through meter with the hot melt of elastic layer raw material by adjusting measuring pump and in step (2)
Weight ratio after amount, distribution is 3-5: 11-14, i.e. for preparing the first spunbond layer, resilient middle layer and the second spunbond layer
Weight ratio of the raw material after metering, distribution is 3-5: 11-14: 3-5.
The manufacturing equipment that the present invention uses is conventional equipment, and the die head of use is S die heads, feed system, screw extruding
Machine, filtration system, measuring pump, spinneret, side cold front heavy rain system and extension apparatus are three groups, are respectively used to prepare the first spunbond
Layer fibre web, resilient middle layer fibre web and the second spunbond layer fibre web.When preparing the elastic non-woven cloth of different grammes per square metres, mainly pass through tune
Finishing equipment entirety speed is realized, is this area conventional method.
In the present invention, although spunbond layer fibre web and elastic layer fibre web are all prepared using spun-bond process, specifically prepared
Different raw material proportionings is employed in journey, its effect is mainly：Elastomer is not used in spunbond layer fibre web, only with soft master batch
And polypropylene chip, when winding up non-woven fabrics finished product and during subsequent applications cloth cover will not adhesion so as to be advantageous to after
Continuous cutting etc. operates, and during non-woven fabrics concrete application, can realize preferable viscose glue effect, effective anti-anti-avulsion
Fall, so as to ensure the quality of downstream product；Elastic layer fibre web uses a high proportion of elastomer, and adds smooth master batch and polypropylene
Section, can ensure that non-woven fabrics has enough elasticity, and be advantageous to intermediate layer and the heat pressure adhesive of two surface layers；In in addition,
Interbed uses different raw material proportionings from surface layer, optimizes technique, reduces production cost.
The non-woven cloth products elastic performance of the present invention is excellent, can fully meet requirement of the medical material to elasticity.
Therefore, the third aspect of the present invention provides purposes of the above-mentioned elastic non-woven cloth in medical material is prepared.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Apply among a scope.The experimental method of unreceipted actual conditions in the following example, conventionally and condition, or according to business
Product specification selects.
Embodiment 1：The preparation of 35g activation type elastic non-woven cloths
(1) preparation of spunbond layer fibre web
3wt% softnesses master batch (GA530) and 97wt% polypropylene chips (Exxon Mobil Corporation, PP3155E5) are formed
10 kilograms of spunbond layer raw material be added in S1 and S3 die heads, each 5 kilograms.The raw material mixed passes through feed system vacuum
It is drawn into screw extruder, carries out extrusion molten under conditions of being 220 DEG C -250 DEG C in screw rod melting temperature, heated
Body.Then, under conditions of operation temperature is 230-250 DEG C, pressure is 7-10MPa, hot melt passes through filtration system and metering
Pump is filtered, measured and distributed.The hot melt distributed sprays silk by the spinneret that aperture is 0.5mm, is through excess temperature
10-15 DEG C, wind speed be 1.0-1.5m/s side cold front heavy rain system cooled down so as to obtain just growing filament.First growing filament passes through
The method of air-flow sub-wire, by the horn mouth of extension apparatus (narrow formula), the gas using draft speed as 3000m/min-4000m/min
Flow drawing-off and obtain fiber, while the first growing filament strand marshalling Jing Guo drawing-off, produce strength, form fiber.
(2) preparation of elastic layer fibre web
By 94wt% elastomers (Exxon Mobil Corporation, Weida U.S. 7050FL), the smooth master batches of 3wt% (HS560) and
20 kilograms of the elastic layer raw material of 3wt% elastic layers polypropylene chip (Exxon Mobil Corporation, PP3155E5) composition is added to S2
In die head.The raw material mixed is vacuum-drawn against in screw extruder by feed system, is 220 in screw rod melting temperature
Extrusion molten is carried out under conditions of DEG C -250 DEG C, obtains hot melt.Then, operation temperature be 230-250 DEG C, pressure 7-
Under conditions of 10MPa, hot melt is filtered, measured and distributed by filtration system and measuring pump.The hot melt distributed leads to
Cross the spinneret that aperture is 0.3-0.6mm and spray silk, it is cold through excess temperature is 10-15 DEG C, wind speed is 1.0-1.5m/s side cold wind
But system is cooled down so as to obtain just growing filament.First method of the growing filament Jing Guo air-flow sub-wire, passes through extension apparatus (narrow formula)
Horn mouth, the air drawing using draft speed as 3000m/min-4000m/min obtains fiber, while by the nascent of drawing-off
Long filament strand marshalling, strength is produced, form fiber.
(3) heat pressure adhesive
In step (1) sub-wire obtain fiber be taped against on networking curtain, into lace curtaining under have air exhauster, pass through downward suction
Wind, fiber is fixed on on lace curtaining and forms lower floor's (the first spunbond layer).Then, the fiber that step (2) sub-wire obtains is taped against into
On lace curtaining, by the suction air that air exhauster is downward, fiber is fixed on on lace curtaining and forms resilient middle layer, then according to formation
The method of lower floor re-forms one layer of fibre web as upper strata (the second spunbond layer) on the intermediate layer.Drive of the three layers of fibre web in lace curtaining roller
Under be transferred to hot-rolling mill, hot-rolling mill temperature be set to 101-117 DEG C, line pressure be set to 50-60MPa, three layers of fibre web are on hot-rolling mill
Non-woven fabrics is formed under the effect of the heat pressure adhesive of roll and bottom roll.
Metering pump revolution in set-up procedure (1) and (2) makes the spunbond layer of preparation first, resilient middle layer and for 4/13/3
Weight ratio of the raw material of two spunbond layers after metering, distribution is 4: 13: 3.50 ms/min of equipment entirety speed.
Embodiment 2：The preparation of 45g activation type elastic non-woven cloths
(1) preparation of spunbond layer fibre web
4wt% softnesses master batch (GA530) and 96wt% polypropylene chips (Exxon Mobil Corporation, PP3155E5) are formed
10 kilograms of spunbond layer raw material be added in S1 and S3 die heads, each 5 kilograms.The raw material mixed passes through feed system vacuum
It is drawn into screw extruder, carries out extrusion molten under conditions of being 180 DEG C -210 DEG C in screw rod melting temperature, heated
Body.Then, under conditions of operation temperature is 230-250 DEG C, pressure is 5-8MPa, hot melt passes through filtration system and measuring pump
Filtered, measured and distributed.The hot melt distributed sprays silk by the spinneret that aperture is 0.3mm, is 15- through excess temperature
20 DEG C, wind speed be 0.6-1.0m/s side cold front heavy rain system cooled down so as to obtain just growing filament.First growing filament passes through gas
The method of flow point silk, by the horn mouth of extension apparatus (narrow formula), the air-flow using draft speed as 3000m/min-4000m/min
Drawing-off obtains fiber, while the first growing filament strand marshalling Jing Guo drawing-off, produces strength, forms fiber.
(2) preparation of elastic layer fibre web
By 94wt% elastomers (Exxon Mobil Corporation, Weida U.S. 7050FL), the smooth master batches of 2wt% (HS560) and
20 kilograms of the elastic layer raw material of 4wt% elastic layers polypropylene chip (Exxon Mobil Corporation, PP3155E5) composition is added to S2
In die head.The raw material mixed is vacuum-drawn against in screw extruder by feed system, is 180 in screw rod melting temperature
Extrusion molten is carried out under conditions of DEG C -210 DEG C, obtains hot melt.Then, operation temperature be 230-250 DEG C, pressure 5-
Under conditions of 8MPa, hot melt is filtered, measured and distributed by filtration system and measuring pump.The hot melt distributed passes through
The spinneret that aperture is 0.3mm sprays silk, through the side cold front heavy rain system that excess temperature is 15-20 DEG C, wind speed is 0.6-1.0m/s
Cooled down so as to obtain just growing filament.First method of the growing filament Jing Guo air-flow sub-wire, passes through the loudspeaker of extension apparatus (narrow formula)
Mouthful, the air drawing using draft speed as 3000m/min-4000m/min obtains fiber, while the first growing filament Jing Guo drawing-off point
Subchain marshalling, strength is produced, form fiber.
(3) heat pressure adhesive
In step (1) sub-wire obtain fiber be taped against on networking curtain, into lace curtaining under have air exhauster, pass through downward suction
Wind, fiber is fixed on on lace curtaining and forms lower floor's (the first spunbond layer).Then, the fiber that step (2) sub-wire obtains is taped against into
On lace curtaining, by the suction air that air exhauster is downward, fiber is fixed on on lace curtaining and forms resilient middle layer, then according to formation
The method of lower floor re-forms one layer of fibre web as upper strata (the second spunbond layer) on the intermediate layer.Drive of the three layers of fibre web in lace curtaining roller
Under be transferred to hot-rolling mill, hot-rolling mill temperature be set to 90-110 DEG C, line pressure be set to 50-60MPa, three layers of fibre web roll on hot-rolling mill
Non-woven fabrics is formed under the effect of the heat pressure adhesive of roller and bottom roll.
Metering pump revolution in set-up procedure (1) and (2) makes the spunbond layer of preparation first, resilient middle layer and for 4/13/3
Weight ratio of the raw material of two spunbond layers after metering, distribution is 4: 13: 3.36.2 ms/min of equipment entirety speed.
Embodiment 3：The preparation of 70g activation type elastic non-woven cloths
(1) preparation of spunbond layer fibre web
2wt% softnesses master batch (GA530) and 98wt% polypropylene chips (Exxon Mobil Corporation, PP3155E5) are formed
10 kilograms of spunbond layer raw material be added in S1 and S3 die heads, each 5 kilograms.The raw material mixed passes through feed system vacuum
It is drawn into screw extruder, carries out extrusion molten under conditions of being 240 DEG C -270 DEG C in screw rod melting temperature, heated
Body.Then, under conditions of operation temperature is 230-250 DEG C, pressure is 7-10MPa, hot melt passes through filtration system and metering
Pump is filtered, measured and distributed.The hot melt distributed sprays silk by the spinneret that aperture is 0.8mm, is through excess temperature
10-15 DEG C, wind speed be 0.2-0.5m/s side cold front heavy rain system cooled down so as to obtain just growing filament.First growing filament passes through
The method of air-flow sub-wire, by the horn mouth of extension apparatus (narrow formula), the gas using draft speed as 3000m/min-4000m/min
Flow drawing-off and obtain fiber, while the first growing filament strand marshalling Jing Guo drawing-off, produce strength, form fiber.
(2) preparation of elastic layer fibre web
By 94wt% elastomers (Exxon Mobil Corporation, Weida U.S. 7050FL), the smooth master batches of 4wt% (HS560) and
20 kilograms of the elastic layer raw material of 2wt% elastic layers polypropylene chip (Exxon Mobil Corporation, PP3155E5) composition is added to S2
In die head.The raw material mixed is vacuum-drawn against in screw extruder by feed system, is 240 in screw rod melting temperature
Extrusion molten is carried out under conditions of DEG C -270 DEG C, obtains hot melt.Then, operation temperature be 230-250 DEG C, pressure 7-
Under conditions of 10MPa, hot melt is filtered, measured and distributed by filtration system and measuring pump.The hot melt distributed leads to
Cross the spinneret that aperture is 0.8mm and spray silk, through the side cold front heavy rain system that excess temperature is 10-15 DEG C, wind speed is 0.2-0.5m/s
System is cooled down so as to obtain just growing filament.First method of the growing filament Jing Guo air-flow sub-wire, passes through the loudspeaker of extension apparatus (narrow formula)
Mouth, the air drawing using draft speed as 3000m/min-4000m/min obtain fiber, while the first growing filament Jing Guo drawing-off
Strand marshalling, strength is produced, form fiber.
(3) heat pressure adhesive
In step (1) sub-wire obtain fiber be taped against on networking curtain, into lace curtaining under have air exhauster, pass through downward suction
Wind, fiber is fixed on on lace curtaining and forms lower floor's (the first spunbond layer).Then, the fiber that step (2) sub-wire obtains is taped against into
On lace curtaining, by the suction air that air exhauster is downward, fiber is fixed on on lace curtaining and forms resilient middle layer, then according to formation
The method of lower floor re-forms one layer of fibre web as upper strata (the second spunbond layer) on the intermediate layer.Drive of the three layers of fibre web in lace curtaining roller
Under be transferred to hot-rolling mill, hot-rolling mill temperature be set to 90-110 DEG C, line pressure be set to 50-60MPa, three layers of fibre web roll on hot-rolling mill
Non-woven fabrics is formed under the effect of the heat pressure adhesive of roller and bottom roll.
Metering pump revolution in set-up procedure (1) and (2) makes the spunbond layer of preparation first, resilient middle layer and for 4/13/3
Weight ratio of the raw material of two spunbond layers after metering, distribution is 4: 13: 3.24.6 ms/min of equipment entirety speed.
Embodiment 4：The preparation of 90g activation type elastic non-woven cloths
Method is same as Example 1, differs only in：The composition of soft master batch used is：The weight of polypropylene homopolymer 47
Measure part, the parts by weight of erucyl amide 26, the parts by weight of polyvinyl alcohol 26 and the parts by weight of phosphite antioxidant 1；The smooth mother used
Grain composition be：The parts by weight of polypropylene homopolymer 45.5, the parts by weight of lauramide 28.5, the parts by weight of polyvinylpyrrolidone 23 and
The parts by weight of phosphite antioxidant 3；18 ms/min of equipment entirety speed.
Embodiment 5：The preparation of 120g activation type elastic non-woven cloths
Method is same as Example 1, differs only in：The composition of soft master batch used is：The weight of polypropylene homopolymer 50
Measure part, the parts by weight of lauramide 23, the parts by weight of polyvinyl alcohol 30 and the parts by weight of phosphite antioxidant 2；The smooth mother used
Grain composition be：The parts by weight of polypropylene homopolymer 47, the parts by weight of stearic amide 28, the parts by weight of polyvinylpyrrolidone 20 and Asia
The parts by weight of phosphate antioxidant 5；14 ms/min of equipment entirety speed.
Embodiment 6：The preparation of 150g activation type elastic non-woven cloths
Method is same as Example 1, differs only in：The composition of soft master batch used is：The weight of polypropylene homopolymer 46
Measure part, the parts by weight of erucyl amide 22, the parts by weight of polyvinyl alcohol 30 and the parts by weight of phosphite antioxidant 2；The smooth mother used
Grain composition be：The parts by weight of polypropylene homopolymer 43, the parts by weight of lauramide 31, the parts by weight of polyvinylpyrrolidone 21 and phosphorous
The parts by weight of acid esters antioxidant 5；10.8 ms/min of equipment entirety speed.
Embodiment 1-6 non-woven cloth products are tested, as a result as shown in table 1.
Table 1
Embodiment 1-6 non-woven cloth products are activated by the speed difference of draw roll, and embodiment 1-6 non-woven fabrics is produced
The elastic performance of product is tested, and method is as follows：Embodiment 1-6 elastic non-woven cloth sample respectively prepares 4 parts, size 50mm*
150mm (MD*CD, longitudinal * are horizontal), the distance between fixture of tension tester two is 100mm.By sample with 500mm/min's
Speed tensile determines the pulling force data (N) during this, after waiting 30s, fixture is returned naturally to 100% elongation state
To original state, and the screen resilience (N) of this process sample is determined, and the final deformation quantity (%) compared with original state, to reality
The elastic non-woven cloth sample for applying a 1-6 calculates average value respectively, as a result as shown in table 2.
Table 2
The present invention is hereinbefore disclosed with preferred embodiment, but it should be understood by those skilled in the art that, these
Embodiment is only used for describing the present invention, and should not be construed as limiting the scope of the present invention.It should be noted that every implement with these
Example equivalent change and displacement, all should be set to be covered by scope of the presently claimed invention.Therefore, protection scope of the present invention
It should be defined by the scope defined in claims.
Claims (12)
- A kind of 1. elastic non-woven cloth, it is characterised in that the elastic non-woven cloth include stack gradually the first spunbond layer, elasticity in Interbed and the second spunbond layer；The surface density of the elastic non-woven cloth is 35-150g/m2, cross directional stretch strength 5.9-67.1N/ 50mm, longitudinal stretching strength 19.7-174.1N/50mm, transverse breakage elongation 255.0%-600.0%, longitudinal elongation at break Rate 69.0%-397.0%.
- 2. elastic non-woven cloth according to claim 1, it is characterised in that first spunbond layer and second spunbond layer The 15%-20% of the elastic non-woven cloth weight is accounted for respectively.
- 3. elastic non-woven cloth according to claim 1 or 2, it is characterised in that the elastic non-woven cloth is in horizontal direction First time tensile force is 7.43-28.89N, and first time retraction force is 4.1-16.4N, and 50% retraction force is 0.2-1.0N for the first time, First time deformation rate is 24%-33%, and second of tensile force is 6.7-25.4N, and second of retraction force is 4.1-16.4N, second Secondary 50% retraction force is 0.2-1.0N, and second of deformation rate is 28%-35%.
- 4. elastic non-woven cloth according to claim 1 or 2, it is characterised in that the elastic non-woven cloth is in longitudinal direction First time tensile force is 15.44-73.73N, and first time retraction force is 8.4-39.8N, and 50% retraction force is 0.2- for the first time 1.3N, first time deformation rate are 27%-42%, and second of tensile force is 14.1-66.3N, and second of retraction force is 8.4- 39.8N, second of 50% retraction force is 0.2-1.3N, and second of deformation rate is 30%-44%.
- 5. the preparation method of the elastic non-woven cloth described in claim any one of 1-4, it is characterised in that comprise the following steps：(1) preparation of spunbond layer fibre web：Spunbond layer raw material including soft master batch and polypropylene chip is mixed, extrude it is molten Melt, spinning and sub-wire lapping, obtain spunbond layer fibre web；(2) preparation of elastic layer fibre web：Elastic layer raw material including elastomer, smooth master batch and polypropylene chip is mixed Conjunction, extrusion molten, spinning and sub-wire lapping, obtain elastic layer fibre web；(3) bond：, will using spunbond layer fibre web as the first spunbond layer and the second spunbond layer using elastic layer fibre web as resilient middle layer Three layers of fibre web heat pressure adhesive, obtain elastic non-woven cloth.
- 6. preparation method according to claim 5, it is characterised in that in step (1), the soft master batch accounts for the spinning The 1%-5% of adhesion coating raw material gross weight, preferably 2%-4%, more preferably 3%.
- 7. the preparation method according to claim 5 or 6, it is characterised in that in step (2), the smooth master batch accounts for institute State the 1%-5% of elastic layer raw material gross weight, preferably 2%-4%, more preferably 3%；The polypropylene chip accounts for the elastic layer The 1%-5% of raw material gross weight, preferably 2%-4%, more preferably 3%.
- 8. according to the preparation method described in claim any one of 5-7, it is characterised in that it is equal that the soft master batch includes polypropylene Polymers 46-50 parts by weight, fatty acid amide 22-27 parts by weight, polyvinyl alcohol 25-30 parts by weight and phosphite antioxidant 1-2 Parts by weight.
- 9. according to the preparation method described in claim any one of 5-8, it is characterised in that the elastomer is by isotactic polypropylene Repeated monomer and the ethene of random distribution form, and mean molecule quantity is 300000-800000, and molecular weight distribution is 3-4, and melting refers to Number is 20g/10min-48g/10min, and the elastomer includes the ethene of 10wt%-20wt% random distribution.
- 10. according to the preparation method described in claim any one of 5-9, it is characterised in that the smooth master batch includes polypropylene Homopolymer 43-48 parts by weight, fatty acid amide 28-31 parts by weight, polyvinylpyrrolidone 20-24 parts by weight and phosphite ester antioxygen Agent 3-5 parts by weight.
- 11. according to the preparation method described in claim any one of 5-10, it is characterised in that the spunbond layer raw material and the bullet The weight ratio of property layer raw material is 3-5: 11-14.
- 12. purposes of the elastic non-woven cloth described in claim any one of 1-4 in medical material is prepared.
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Denomination of invention: Elastic non-woven fabric and its preparation method and Application Effective date of registration: 20220331 Granted publication date: 20200707 Pledgee: Guangrao County sub branch of Postal Savings Bank of China Ltd. Pledgor: SHANDONG HENGPENG HYGIENIC PRODUCTS CO.,LTD. Registration number: Y2022980003570 |