CN116745478A - Stretchable nonwoven fabric, method for producing stretchable nonwoven fabric, and article comprising stretchable nonwoven fabric - Google Patents
Stretchable nonwoven fabric, method for producing stretchable nonwoven fabric, and article comprising stretchable nonwoven fabric Download PDFInfo
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- CN116745478A CN116745478A CN202180092125.XA CN202180092125A CN116745478A CN 116745478 A CN116745478 A CN 116745478A CN 202180092125 A CN202180092125 A CN 202180092125A CN 116745478 A CN116745478 A CN 116745478A
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- stretchable
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- nonwoven fabric
- nonwoven web
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 121
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 19
- -1 polypropylene Polymers 0.000 claims description 79
- 239000004743 Polypropylene Substances 0.000 claims description 61
- 229920001155 polypropylene Polymers 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 46
- 239000004750 melt-blown nonwoven Substances 0.000 claims description 25
- 238000012545 processing Methods 0.000 claims description 23
- 239000010410 layer Substances 0.000 claims description 21
- 239000004698 Polyethylene Substances 0.000 claims description 19
- 229920000573 polyethylene Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 13
- 238000009987 spinning Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 description 28
- 238000002360 preparation method Methods 0.000 description 18
- 229920006026 co-polymeric resin Polymers 0.000 description 13
- 238000004049 embossing Methods 0.000 description 12
- 239000013013 elastic material Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000035601 cold sensitivity Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1161—Means for fastening to the user's head
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
-
- 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
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
-
- 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
-
- 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
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
Abstract
The invention discloses a stretchable nonwoven fabric, a method for producing the stretchable nonwoven fabric, and an article comprising the stretchable nonwoven fabric. In the disclosed stretchable nonwoven fabric, the elongation in the machine direction is 40% or less, the elongation in the cross direction is 300% to 400%, and the stretch recovery in the cross direction is 70% or more.
Description
Technical Field
The invention discloses a stretchable nonwoven fabric, a method for producing the stretchable nonwoven fabric, and an article comprising the stretchable nonwoven fabric. More specifically, disclosed are a stretchable nonwoven fabric having excellent water absorbability and cold sensitivity, a method for producing the stretchable nonwoven fabric, and an article comprising the stretchable nonwoven fabric.
Background
In most masks, the ear-hanging portion for wearing consists of a string-type ear strap.
In some special masks, the ear-hanging part is made of a non-woven fabric material, and in this case, a material combining a common non-woven fabric and an elastic film is generally used. The reason for this is that the rope-type ear belt is painful when worn for a long time, but if the ear belt portion is made of a nonwoven fabric material, pain is not caused, and thus a promotional program can be developed accordingly.
The common non-woven fabric is combined with the elastic film, so that the ear-hanging part must have elasticity when the mask is worn, and the mask can be tightly attached to the skin after being worn.
If a pure nonwoven fabric is used instead of a material in which a general nonwoven fabric and an elastic film are combined, it should have stretch recovery without an elastic film, but since a general nonwoven fabric does not have stretch recovery, it is difficult to apply it to an ear-hanging portion of a mask.
Disclosure of Invention
Technical problem
An embodiment of the present invention provides a stretchable nonwoven fabric having excellent stretch recovery in the cross direction.
Another embodiment of the invention provides a method for preparing the stretchable non-woven fabric.
Another embodiment of the present invention also provides an article comprising the stretchable nonwoven fabric.
Technical proposal
In one aspect, the present invention provides a stretchable nonwoven fabric, wherein,
the elongation in the machine direction is 40% or less, the elongation in the cross direction is 300% to 400%, and the stretch recovery in the cross direction is 70% or more.
The stretchable nonwoven may comprise a single layer or a plurality of layers of spunbond nonwoven webs.
The spunbond nonwoven web may include 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable material.
The stretchable material may comprise a material having a density of 0.860g/cm 3 To 0.870g/cm 3 85 to 90 parts by weight of polypropylene and 10 to 15 parts by weight of polyethylene.
The stretchable material may comprise a material having a density of 0.860g/cm 3 To 0.870g/cm 3 From 86.5 to 93 parts by weight of polypropylene and from 7 to 13.5 parts by weight of polyethylene.
The stretchable nonwoven may comprise two layers of spunbond nonwoven web.
The stretch nonwoven may include a pair of spunbond nonwoven webs and a meltblown nonwoven web therebetween.
The meltblown nonwoven web may comprise polypropylene.
The content of the meltblown nonwoven web may be less than or equal to 30 parts by weight relative to 100 parts by weight of the stretchable nonwoven web.
The basis weight of the stretchable nonwoven may be from 20gsm to 80gsm.
In another aspect, the present invention provides a method for preparing a stretchable nonwoven fabric, comprising:
preparing a spunbond nonwoven web by spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable raw material (S10); and
the spunbond nonwoven web is contracted in the cross direction at a cross direction contraction processing rate of 50% to 65% (S20).
In the method for producing a stretchable nonwoven fabric, between the step (S10) and the step (S20), the method may further include: another spunbond nonwoven web was prepared by spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable raw material so as to be laminated on the spunbond nonwoven web prepared in the step (S10) (S12).
In the method for producing a stretchable nonwoven fabric, between the step (S10) and the step (S20), the method may further include: a meltblown nonwoven web is prepared by spinning polypropylene so as to be interposed between the spunbond nonwoven web prepared in the step (S10) and the spunbond nonwoven web prepared in the step (S12) (14).
In addition, the preparation method of the stretchable non-woven fabric can further comprise the following steps: in the step (S20), the spun-bonded nonwoven web contracted in the cross direction is passed through a cooling roll and then wound (S30).
In the step (S30), the temperature of the cooling roller may be maintained at 60 ℃ to 80 ℃.
In the step (S20), the spunbond nonwoven web prepared in the step (S10) may be dried with hot air at a temperature of 120 to 150 ℃ and a tension of 20 to 50N may be applied in the machine direction.
According to a further aspect of the present invention,
also provided is an article comprising the stretchable nonwoven fabric.
The article may comprise a mask ear strap.
Advantageous effects
The stretch nonwoven fabric according to an embodiment of the present invention is suppressed in stretching in the machine direction and returns to 70% or more of its original shape after stretching in the cross direction, so that it can be applied to articles requiring stretchability, such as mask ear bands.
Brief description of the drawings
Fig. 1 is a diagram for describing the definition of the "cross-direction shrinkage processing rate".
Fig. 2 is a diagram for describing the definition of "cross direction stretch restoration".
Detailed Description
Hereinafter, the stretchable nonwoven fabric according to an embodiment of the present invention will be described in detail.
In the present specification, the "cross direction shrinkage processing ratio" refers to a ratio of a length of the nonwoven fabric which is shrunk in the cross direction to an initial length when a tensile force (tension) is applied in the machine direction (machine direction) to stretch the nonwoven fabric while drying the nonwoven fabric with hot air, as shown in fig. 1. Specifically, referring to fig. 1, the "cross direction shrinkage processing rate" may be calculated according to the following equation 1.
[ math 1 ]
Cross direction shrinkage processing ratio (%) = (Li-Lf)/li×100
According to the stretchable nonwoven fabric of an embodiment of the present invention, the elongation in the machine direction is 40% or less, the elongation in the cross direction is 300% to 400%, and the stretch recovery in the cross direction is 70% or more. The stretchable nonwoven fabric having elongation in the machine direction, elongation in the cross direction and stretch recovery in the cross direction in the above-described ranges has been developed for the first time by the present inventors, and is a novel nonwoven fabric which does not exist at present.
The stretchable nonwoven may comprise a single layer or a plurality of layers of spunbond nonwoven webs.
The spunbond nonwoven web may include 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable material. When the contents of the polypropylene and the stretchable raw material are respectively within the ranges, a stretchable nonwoven fabric having an elongation in the machine direction of 40% or less, an elongation in the cross direction of 300% to 400%, and a stretch recovery in the cross direction of 70% or more can be obtained.
The stretchable material may comprise a material having a density of 0.860g/cm 3 To 0.870g/cm 3 85 to 90 parts by weight of polypropylene and 10 to 15 parts by weight of polyethylene. For example, the stretchable material may comprise a material having a density of 0.860g/cm 3 To 0.870g/cm 3 From 86.5 to 93 parts by weight of polypropylene and from 7 to 13.5 parts by weight of polyethylene.
As an example, the stretchable nonwoven may comprise two layers of spunbond nonwoven web. For example, the stretchable nonwoven may be a composite nonwoven having a multi-layer structure in which two spunbond nonwoven webs are laminated one on top of the other. In this case, the two spunbond nonwoven webs may have the same basis weight.
As another example, the stretchable nonwoven may comprise a pair of spunbond nonwoven webs and a meltblown nonwoven web therebetween. For example, the stretchable nonwoven may be a composite nonwoven having a three-layer structure in which a first spunbond nonwoven web, a meltblown nonwoven web, and a second spunbond nonwoven web are laminated in this order.
The meltblown nonwoven web may comprise polypropylene. For example, the meltblown nonwoven web may be comprised of polypropylene.
In addition, the content of the meltblown nonwoven web in the stretchable nonwoven fabric may be 30 parts by weight or less with respect to 100 parts by weight of the stretchable nonwoven fabric. When the content of the meltblown nonwoven web is within the range, an stretchable nonwoven fabric having an elongation in the machine direction of 40% or less, an elongation in the cross direction of 300% to 400%, and a stretch recovery in the cross direction of 70% or more can be obtained.
In addition, the basis weight of the stretchable nonwoven fabric may be 20gsm (g/m 2 ) Up to 80gsm (g/m) 2 )。
Hereinafter, a method for preparing the stretchable nonwoven fabric according to an embodiment of the present invention will be described in detail.
The preparation method of the stretchable non-woven fabric according to one embodiment of the invention comprises the following steps: preparing a spunbond nonwoven web by spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable raw material (S10); and shrinking the spunbond nonwoven web in the cross direction at a cross direction shrink processing rate of 50% to 65% (S20).
When the contents of the polypropylene and the stretchable raw material in the mixture of the step (S10) are respectively within the ranges and the cross-direction shrinkage processing rate of the step (S20) is within the ranges, a stretchable nonwoven fabric having an elongation in the machine direction of 40% or less, an elongation in the cross direction of 300% to 400%, and a stretch recovery in the cross direction of 70% or more can be obtained.
The stretchable material in the step (S10) may be the same as the stretchable material in the portion of the stretchable nonwoven fabric.
In the step (S20), the spunbond nonwoven web prepared in the step (S10) may be dried with hot air at a temperature of 120 to 150 ℃ and a tension of 20 to 50N may be applied in the machine direction.
In the method for producing a stretchable nonwoven fabric, between the step (S10) and the step (S20), the method may further include: another spunbond nonwoven web was prepared by spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable raw material so as to be laminated on the spunbond nonwoven web prepared in the step (S10) (S12).
The spunbond nonwoven web prepared in the step (S12) may have the same composition as the spunbond nonwoven web prepared in the step (S10).
In addition, in the step (S12), when the spunbond nonwoven web is produced, the basis weight thereof may be adjusted to be the same as that of the spunbond nonwoven web produced in the step (S10).
In the method for producing a stretchable nonwoven fabric, between the step (S10) and the step (S20), the method may further include: a meltblown nonwoven web is prepared by spinning polypropylene so as to be interposed between the spunbond nonwoven web prepared in the step (S10) and the spunbond nonwoven web prepared in the step (S12) (14).
In the step (14), the basis weight of the melt-blown nonwoven web may be adjusted to 30% or less of the basis weight of the final stretchable nonwoven web.
In addition, when the method of producing the stretchable nonwoven fabric includes the step (12), or both the step (12) and the step (14), the method of producing the stretchable nonwoven fabric may include a step (S20 ') instead of the step (S20), the step (S20) is to shrink the spunbond nonwoven web in the cross direction at a cross direction shrinkage processing rate of 50% to 65%, and the step (S20') is to shrink the whole nonwoven web laminate in the cross direction at a cross direction shrinkage processing rate of 50% to 65%.
In addition, the preparation method of the stretchable non-woven fabric can further comprise the following steps: in the step (S20), the spun-bonded nonwoven web contracted in the cross direction is passed through a cooling roll and then wound (S30).
In the step (S30), the temperature of the cooling roller may be maintained at 60 ℃ to 80 ℃.
Another embodiment of the present invention also provides an article comprising the stretchable nonwoven fabric.
The article may comprise a mask ear strap.
The present invention will be described in more detail by way of examples. These examples are used to describe the present invention in more detail, and the scope of the present invention is not limited to these examples.
Example 1: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Example 2: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 30 parts by weight of polypropylene and 70 parts by weight of a stretchable raw material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. Combining the first spunbond nonwoven web with the first spunbond nonwoven webThe second spunbond nonwoven web was laminated to form a composite having a two-layer structure, which was then bonded by passing it through calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Example 3: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 15 parts by weight of polypropylene and 85 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Example 4: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. Laminating the first spunbond nonwoven web and the second spunbond nonwoven web to form a composite having a two-layer structure, and then passing it through a calender roll having an embossing rate of 11%And (5) bonding. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 50% to prepare a stretchable nonwoven fabric.
Example 5: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 65% to prepare a stretchable nonwoven fabric.
Example 6: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. In addition, a polypropylene melt-blown nonwoven web was prepared in a proportion of 10 parts by weight with respect to 100 parts by weight of the final stretchable nonwoven fabric. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. Sequentially laminating the first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web to form a three-layer composite, and then passing it through a laminate having 11% embossmentThe calender rolls of the rate were bonded. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Example 7: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. In addition, a polypropylene melt-blown nonwoven web was prepared in a proportion of 20 parts by weight with respect to 100 parts by weight of the final stretchable nonwoven fabric. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were laminated in order to form a three-layer composite, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Example 8: preparation of stretchable nonwoven fabrics
A nonwoven fabric is produced which is maximally restrained from stretching in the machine direction and is stretchable in the cross direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. In addition, a polypropylene melt-blown nonwoven web was prepared in a proportion of 30 parts by weight with respect to 100 parts by weight of the final stretchable nonwoven fabric. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. Will be spentThe first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were laminated in order to form a three-layer composite, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Comparative example 1: preparation of nonwoven fabrics
A nonwoven fabric was prepared. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 35 parts by weight of polypropylene and 65 parts by weight of a stretchable raw material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Comparative example 2: preparation of nonwoven fabrics
A nonwoven fabric was prepared. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 10 parts by weight of polypropylene and 90 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in the machine direction and stretchingThereby adjusting the cross direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
Comparative example 3: preparation of nonwoven fabrics
A nonwoven fabric was prepared. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 45% to prepare a stretchable nonwoven fabric.
Comparative example 4: preparation of nonwoven fabrics
A nonwoven fabric was prepared. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectively. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite having a two-layer structure, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 70% to prepare a stretchable nonwoven fabric.
Comparative example 5: preparation of nonwoven fabrics
A nonwoven fabric was prepared. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web having a content of 22 parts by weight of polypropylene and 78 parts by weight of an elastic material were prepared, respectivelyA two-stage spunbond nonwoven web. In addition, a polypropylene melt-blown nonwoven web was prepared in a proportion of 35 parts by weight with respect to 100 parts by weight of the final stretchable nonwoven fabric. Wherein, as the stretchable material, a material having a density of 0.865g/cm was used 3 A copolymer resin of 90 parts by weight of polypropylene and 10 parts by weight of polyethylene. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were laminated in order to form a three-layer composite, which was then bonded by calender rolls having an embossing rate of 11%. Thereafter, the bonded composite was passed through a Dryer (Dryer) generating hot air set to a temperature of 150 ℃ while applying tension (tension) in a machine direction and stretching, thereby adjusting a cross-direction shrinkage processing rate to 58% to prepare a stretchable nonwoven fabric.
The raw materials, compositions, preparation methods and preparation conditions of the nonwoven fabrics prepared in examples 1 to 8 and comparative examples 1 to 5 are shown in table 1 below. In the following table 1, the content of the stretchable raw material and the content of polypropylene (PP) in the first spunbond nonwoven web or the second spunbond nonwoven web are calculated as 100 parts by weight of the total weight of the first spunbond nonwoven web or the second spunbond nonwoven web, respectively, and the content of polypropylene in the meltblown nonwoven web is calculated as 100 parts by weight of the total weight of the whole nonwoven web.
[ Table 1 ]
Evaluation example: evaluation of physical Properties of nonwoven fabrics
The physical properties of the nonwoven fabrics prepared in examples 1 to 8 and comparative examples 1 to 5 were evaluated according to the following methods, and the results are shown in table 2 below.
(1) Machine direction elongation and cross direction elongation: the elongation at maximum elongation was obtained by performing a tensile test under conditions of a specimen width of 5cm, an interval of 10cm and a tensile speed of 500mm/min according to the KSK0520 method using a tensile strength tester (Instron) measuring apparatus.
(2) Cross direction stretch recovery: the cross direction stretch recovery was evaluated using a tensile strength tester (Instron) measurement apparatus according to the method shown in fig. 2. Specifically, the nonwoven fabrics prepared in examples 1 to 8 and comparative examples 1 to 5 were cut to a length of 30mm in the cross direction and a width of 25mm in the machine direction to prepare nonwoven fabric samples. Then, each nonwoven fabric sample was stretched 100% in the intersecting direction using a pair of jigs at a speed of 500mm/min to perform the first stretching (i.e., the nonwoven fabric sample was stretched to a length of 60mm in the intersecting direction by widening the gap between the pair of jigs), and in such a 100% stretched state, was held for 1 minute, and after the gap between the pair of jigs was narrowed and returned to the original position (i.e., after relaxation (relax)), the recovery was performed for 1 minute. Then, after stretching 100% at a speed of 500mm/min in the crossing direction to perform the second stretching, the test was terminated after the gap between the pair of jigs was narrowed and returned to the original position (i.e., after relaxation) in such a 100% stretched state for 1 minute.
Referring to fig. 2, the cross direction stretch recovery was judged based on the starting point at the time of performing the second stretching. That is, in the graph of fig. 2, since the force (i.e., the stretching force) acts from the 20% point (i.e., the length increased by 20% from the original length=30mm+30mm×0.2=36 mm) at the time of the second stretching, the cross-direction stretch recovery is recorded as 80%. At this time, it can be seen that no force acts up to the 20% point during the second stretching, and therefore the cross-direction stretch recovery is lost by 20%.
(3) Spinning property: the nonwoven web was observed for breaks, if not, and was recorded as "good".
[ Table 2 ]
Referring to table 1 above, in the nonwoven fabrics prepared from examples 1 to 8, the machine direction elongation was 40% or less, the cross direction elongation was 300% to 400%, the cross direction stretch recovery was 70% or more, and the spinnability was also excellent.
In the nonwoven fabrics prepared from comparative examples 1 to 5, however, the machine direction elongation thereof was more than 40%,
or a cross-direction elongation of less than 300% or greater than 400%, or a cross-direction stretch recovery of less than 70%, and
and/or the spinnability is also poor.
Although the present invention has been described with reference to the accompanying drawings and embodiments, this is by way of example only, and it is to be understood by those skilled in the art that various modifications and equivalent other embodiments may be made thereto. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.
Claims (18)
1. An stretchable nonwoven fabric, wherein the elongation in the machine direction is 40% or less, the elongation in the cross direction is 300% to 400%, and the stretch recovery in the cross direction is 70% or more.
2. The stretchable nonwoven according to claim 1, wherein the stretchable nonwoven comprises a single layer or a plurality of layers of spunbond nonwoven web.
3. The stretchable nonwoven fabric according to claim 2, wherein the spunbond nonwoven web comprises 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of stretchable raw material.
4. The stretchable nonwoven fabric according to claim 3, wherein the stretchable raw materialThe material comprises a material with a density of 0.860g/cm 3 To 0.870g/cm 3 85 to 90 parts by weight of polypropylene and 10 to 15 parts by weight of polyethylene.
5. The stretchable nonwoven fabric according to claim 4, wherein the stretchable material comprises a material having a density of 0.860g/cm 3 To 0.870g/cm 3 From 86.5 to 93 parts by weight of polypropylene and from 7 to 13.5 parts by weight of polyethylene.
6. The stretchable nonwoven according to claim 2, wherein the stretchable nonwoven comprises two layers of spunbond nonwoven web.
7. The stretchable nonwoven according to claim 6, wherein the stretchable nonwoven comprises a pair of spunbond nonwoven webs and a meltblown nonwoven web therebetween.
8. The stretchable nonwoven fabric according to claim 7, wherein the meltblown nonwoven web comprises polypropylene.
9. The stretchable nonwoven fabric according to claim 7, wherein the content of the meltblown nonwoven web is 30 parts by weight or less with respect to 100 parts by weight of the stretchable nonwoven fabric.
10. The stretchable nonwoven according to claim 1, wherein the basis weight is from 20gsm to 80gsm.
11. A method for preparing a stretchable nonwoven fabric, comprising: preparing a spunbond nonwoven web by spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable raw material (S10); and
the spunbond nonwoven web is contracted in the cross direction at a cross direction contraction processing rate of 50% to 65% (S20).
12. The method for producing a stretchable nonwoven fabric according to claim 11, wherein,
between the step (S10) and the step (S20), further comprising: another spunbond nonwoven web was prepared by spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretchable raw material so as to be laminated on the spunbond nonwoven web prepared in the step (S10) (S12).
13. The method for producing a stretchable nonwoven fabric according to claim 12, wherein,
between the step (S10) and the step (S20), further comprising: a meltblown nonwoven web is prepared by spinning polypropylene so as to be interposed between the spunbond nonwoven web prepared in the step (S10) and the spunbond nonwoven web prepared in the step (S12) (14).
14. The method for producing a stretchable nonwoven fabric according to claim 11, further comprising:
in the step (S20), the spun-bonded nonwoven web contracted in the cross direction is passed through a cooling roll and then wound (S30).
15. The method for producing a stretchable nonwoven fabric according to claim 14, wherein in the step (S30), the temperature of the cooling roll is maintained at 60 ℃ to 80 ℃.
16. The method for producing a stretchable nonwoven fabric according to claim 11, wherein in the step (S20), the spunbond nonwoven web produced in the step (S10) is dried with hot air at a temperature of 120 ℃ to 150 ℃ and a tension of 20N to 50N is applied in the machine direction.
17. An article comprising the stretchable nonwoven fabric according to any one of claims 1 to 10.
18. The article of claim 17, comprising:
mask ear strap.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020210012489A KR102488098B1 (en) | 2021-01-28 | 2021-01-28 | Stretchable nonwoven fabric, method of preparing the stretchable nonwoven fabric, and article including the stretchable nonwoven fabric |
| KR10-2021-0012489 | 2021-01-28 | ||
| PCT/KR2021/016784 WO2022163980A1 (en) | 2021-01-28 | 2021-11-16 | Elastic nonwoven fabric, method for manufacturing elastic nonwoven fabric, and product comprising elastic nonwoven fabric |
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| JP (1) | JP2024505042A (en) |
| KR (1) | KR102488098B1 (en) |
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| JP3286457B2 (en) * | 1994-02-01 | 2002-05-27 | 大和紡績株式会社 | Elastic composite nonwoven fabric |
| JP4379844B2 (en) * | 2000-06-19 | 2009-12-09 | 丸榮日産株式会社 | Highly stretchable nonwoven fabric and method for producing the same |
| DE10249431A1 (en) | 2002-10-23 | 2004-05-19 | Fibertex A/S | Nonwoven material with elastic properties, process for its production and device for carrying out the process |
| JP4545414B2 (en) * | 2003-10-21 | 2010-09-15 | 大王製紙株式会社 | Non-woven |
| JP2007054381A (en) * | 2005-08-25 | 2007-03-08 | Kurashiki Seni Kako Kk | Cubical mask |
| WO2017066432A1 (en) * | 2015-10-16 | 2017-04-20 | Avintiv Specialty Materials Inc. | Nonwovens having aligned segmented fibers |
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