JP2024505042A - Stretchable nonwoven fabric, method for producing stretchable nonwoven fabric, and article containing stretchable nonwoven fabric - Google Patents

Abstract

A stretchable nonwoven fabric, a method for producing the stretchable nonwoven fabric, and an article containing the stretchable nonwoven fabric are provided. The stretchable nonwoven fabric has an elongation in the MD direction of 40% or less, an elongation in the CD direction of 300 to 400%, and a stretch recovery property in the CD direction of 70% or more.

Description

The present invention relates to a stretchable nonwoven fabric, a method for producing a stretchable nonwoven fabric, and an article containing a stretchable nonwoven fabric, and more specifically, a stretchable nonwoven fabric with excellent water absorption and cooling performance, a method for producing a stretchable nonwoven fabric, and a stretchable nonwoven fabric. The present invention relates to an article containing a nonwoven fabric.

Most masks consist of string-like earbands with earrings for wearing.

In some specialized masks, a nonwoven material is used for the earrings, but in this case, a material made by laminating a general nonwoven fabric and an elastic film is generally used. The reason for this is that string-like earbands cause pain when worn for long periods of time, but if non-woven material is applied to the earband, there will be no pain, and promotional activities can be developed based on this. It's for a reason.

The reason why a general non-woven fabric and an elastic film are laminated is that when a mask is worn, the earrings have elasticity so that they can fit tightly against the skin and function as a mask.

In order to replace a material made by laminating a general non-woven fabric and an elastic film with a pure non-woven fabric, it must have elasticity and recovery properties without the elastic film. There is a problem in that it is difficult to apply to certain parts.

An embodiment of the present invention provides a stretchable nonwoven fabric with excellent stretch recovery properties in the CD direction.

Another embodiment of the present invention provides a method for manufacturing the stretchable nonwoven fabric.

Still another embodiment of the present invention provides an article including the stretchable nonwoven fabric.

One aspect of the present invention is
Provided is a stretchable nonwoven fabric having an elongation in the MD direction of 40% or less, an elongation in the CD direction of 300 to 400%, and a stretch recovery property in the CD direction of 70% or more.

The stretchable nonwoven fabric may include a single layer or multiple layers of spunbond nonwoven web.

The spunbond nonwoven web may include 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of stretch material.

The elastic raw material may include a copolymer resin containing 85 to 90 parts by weight of polypropylene and 10 to 15 parts by weight of polyethylene and having a density of 0.860 to 0.870 g/cm ³ .

The elastic raw material may include a copolymer resin containing 86.5 to 93 parts by weight of polypropylene and 7 to 13.5 parts by weight of polyethylene, each having a density of 0.860 to 0.870 g/cm ³ .

The stretchable nonwoven fabric may include two layers of spunbond nonwoven webs.

The stretchable nonwoven fabric may include a pair of spunbond nonwoven webs and a meltblown nonwoven web interposed therebetween.

The meltblown nonwoven web may include polypropylene.

The content of the melt-blown nonwoven web may be 30 parts by weight or less based on 100 parts by weight of the stretchable nonwoven fabric.

The stretchable nonwoven fabric also has a basis weight of 20 to 80 gsm.

Other aspects of the invention include:
Step S10 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of elastic raw material to produce a spunbond nonwoven web;
Shrinking the spunbond nonwoven web in the CD direction at a CD shrinkage processing rate of 50 to 65%, S20;
Provided is a method for producing a stretchable nonwoven fabric.

The method for manufacturing the stretchable nonwoven fabric includes adding 15 to 30 parts by weight of polypropylene and a stretchable raw material between the step S10 and the step S20 so as to be laminated on the spunbond nonwoven web produced in the step S10. The method may further include step S12 of spinning 70 to 85 parts by weight of the mixture to produce another spunbond nonwoven web.

In addition, in the method for producing a stretchable nonwoven fabric, between the step S10 and the step S20, the spunbond nonwoven web produced in the step S10 and the spunbond nonwoven web produced in the step S12 are combined. The process may further include a step S14 of spinning polypropylene to produce a meltblown nonwoven web interposed therebetween.

In addition, the method for manufacturing a stretchable nonwoven fabric may further include a step S30 of passing the spunbond nonwoven web, which has been shrunk in the CD direction in step S20, through a cooling roller and then winding the web.

In step S30, the cooling roller may be maintained at a temperature of 60 to 80°C.

Step S20 may also be performed by applying a tension of 20 to 50 N in the MD direction while drying the spunbond nonwoven web manufactured in step S10 with hot air at a temperature of 120 to 150°C.

Yet another aspect of the invention is
An article including the stretchable nonwoven fabric is provided.

The article may include a mask earband.

The stretchable nonwoven fabric according to an embodiment of the present invention suppresses stretching in the MD direction, and recovers 70% or more of its original shape after stretching in the CD direction, thereby achieving stretchability like a mask ear band. Can be used for required items.

It is a drawing for explaining the definition of the term "CD direction shrinkage processing rate." It is a drawing for explaining the definition of the term "CD direction stretch recovery property."

Hereinafter, a stretchable nonwoven fabric according to an embodiment of the present invention will be described in detail.

In this specification, "CD direction (cross direction) shrinkage processing rate" means, as shown in FIG. 1, tension is applied in the MD direction (machine direction) while drying the nonwoven fabric with hot air. Stretching refers to the ratio of the length of the nonwoven fabric contracted in the CD direction to its initial length. Specifically, referring to FIG. 1, the "CD direction shrinkage processing rate" is also calculated using the following equation 1.

[Number 1]
CD direction shrinkage processing rate (%) = (Li-Lf)/Li*100

The stretchable nonwoven fabric according to an embodiment of the present invention has an elongation in the MD direction of 40% or less, an elongation in the CD direction of 300 to 400%, and a stretch recovery property in the CD direction of 70% or more. The stretchable nonwoven fabric whose elongation in the MD direction, elongation in the CD direction, and stretch recovery in the CD direction are each within the above ranges was first developed by the present inventors, and did not exist before. This is a new nonwoven fabric.

The stretchable nonwoven fabric may include a single layer or multiple layers of spunbond nonwoven web.

The spunbond nonwoven web may include 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of stretch material. If the contents of the polypropylene and the stretch raw material are each within the above ranges, the elongation in the MD direction is 40% or less, the elongation in the CD direction is 300 to 400%, and the stretch recovery property in the CD direction is 70%. A stretchable nonwoven fabric having the above properties is obtained.

The elastic raw material also includes a copolymer resin containing 85 to 90 parts by weight of polypropylene and 10 to 15 parts by weight of polyethylene, each having a density of 0.860 to 0.870 g/cm ³ . For example, the elastic raw material may include a copolymer resin containing 86.5 to 93 parts by weight of polypropylene and 7 to 13.5 parts by weight of polyethylene, each having a density of 0.860 to 0.870 g/cm ³ .

In one example, the stretchable nonwoven fabric may include a two-layer spunbond nonwoven web. For example, the stretchable nonwoven fabric may be a composite nonwoven fabric with a multilayer structure in which two layers of spunbond nonwoven webs are stacked one above the other. In this case, the two layers of spunbond nonwoven webs also have the same basis weight as each other.

As another example, the stretchable nonwoven fabric may include a pair of spunbond nonwoven webs and a meltblown nonwoven web interposed therebetween. For example, the stretchable nonwoven fabric may be a composite nonwoven fabric having a three-layer structure in which a first spunbond nonwoven web, a meltblown nonwoven web, and a second spunbond nonwoven web are sequentially laminated.

The meltblown nonwoven web also includes polypropylene. For example, the meltblown nonwoven web may be comprised of polypropylene.

Further, in the stretchable nonwoven fabric, the content of the meltblown nonwoven web is 30 parts by weight or less based on 100 parts by weight of the stretchable nonwoven fabric. If the content of the meltblown nonwoven web is within the above range, the elongation in the MD direction is 40% or less, the elongation in the CD direction is 300 to 400%, and the stretch recovery property in the CD direction is 70% or more. A certain stretchable nonwoven fabric is obtained.

Furthermore, the stretchable nonwoven fabric also has a basis weight of 20 to 80 gsm (g/m ² ).

Hereinafter, a method for manufacturing a stretchable nonwoven fabric according to an embodiment of the present invention will be described in detail.

A method for manufacturing a stretchable nonwoven fabric according to an embodiment of the present invention includes a step S10 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretch raw material to produce a spunbond nonwoven web; The method includes a step S20 of shrinking the nonwoven web in the CD direction at a CD direction shrinkage processing rate of 50 to 65%.

In the step S10, if the contents of the polypropylene and the elastic raw material in the mixture are within the ranges, and in the step S20, the shrinkage processing rate in the CD direction is within the range, the elongation in the MD direction is 40% or less, an elongation in the CD direction of 300 to 400%, and a stretch recovery property in the CD direction of 70% or more.

The stretchable raw material in step S10 is the same as the stretchable raw material for the stretchable nonwoven fabric-related portion described above.

Step S20 may also be performed by applying a tension of 20 to 50 N in the MD direction while drying the spunbond nonwoven web manufactured in step S10 with hot air at a temperature of 120 to 150°C.

In addition, in the method for producing a stretchable nonwoven fabric, between the step S10 and the step S20, 15 to 30 parts by weight of polypropylene and The method may further include step S12 of spinning a mixture of 70 to 85 parts by weight of the elastic raw material to produce another spunbond nonwoven web.

The spunbond nonwoven web manufactured in step S12 may have the same composition as the spunbond nonwoven web manufactured in step S10.

Also, when the spunbond nonwoven web is manufactured in step S12, its basic weight may be adjusted to be the same as the basic weight of the spunbond nonwoven web manufactured in step S10.

Furthermore, in the method for producing a stretchable nonwoven fabric, between the step S10 and the step S20, the spunbond nonwoven web produced in the step S10 and the spunbond nonwoven web produced in the step S12 are combined. The process may further include a step S14 of spinning polypropylene to produce a meltblown nonwoven web interposed therebetween.

When manufacturing the melt blown nonwoven web in step S14, its basis weight may be adjusted to be 30% or less of the basis weight of the final stretchable nonwoven fabric.

Further, when the method for manufacturing the stretchable nonwoven fabric includes the step S12, or both the step S12 and the step S14, the method for manufacturing the stretchable nonwoven fabric includes the spunbond nonwoven web having a CD of 50 to 65%. Instead of the step S20 of shrinking in the CD direction at a directional shrinkage rate, it may also include a step S20' of shrinking the entire nonwoven web laminate in the CD direction at a CD direction shrinkage rate of 50-65%.

Furthermore, the method for manufacturing a stretchable nonwoven fabric may further include a step S30 of passing the spunbond nonwoven web, which was shrunk in the CD direction in step S20, through a cooling roller and then winding the web.

In step S30, the cooling roller is maintained at a temperature of 60 to 80°C.

Still another embodiment of the present invention provides an article including the stretchable nonwoven fabric.

The article may include a mask earband.

Hereinafter, the present invention will be explained in more detail through Examples. The present Examples are provided to explain the present invention more specifically, and the scope of the present invention is not limited to these Examples.

Example 1: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite is passed through a dryer that generates hot air set at a temperature of 150° C., and stretched while applying tension in the MD direction, so that the shrinkage processing rate in the CD direction is 58. % to produce a stretchable nonwoven fabric.

Example 2: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were manufactured, each containing 30 parts by weight of polypropylene and 70 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Example 3: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were manufactured, each containing 15 parts by weight of polypropylene and 85 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Example 4: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite is passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction is adjusted to 50% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Example 5: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite is passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage rate in the CD direction is adjusted to 65% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Example 6: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. A polypropylene meltblown nonwoven web was also produced at a ratio of 10 parts by weight to 100 parts by weight of the final stretchable nonwoven fabric. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were sequentially laminated to form a three-layer composite, and then rolled into a calendar roll with an embossing ratio of 11%. Bonding was performed. Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Example 7: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. A polypropylene meltblown nonwoven web was also produced at a ratio of 20 parts by weight to 100 parts by weight of the final stretchable nonwoven fabric. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were sequentially laminated to form a three-layer composite, and then rolled into a calendar roll with an embossing ratio of 11%. Bonding was performed. Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Example 8: Manufacture of stretchable nonwoven fabric A nonwoven fabric was manufactured in which elongation in the MD direction was suppressed to the maximum extent and had stretchability in the CD direction. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. A polypropylene meltblown nonwoven web was also produced at a ratio of 30 parts by weight to 100 parts by weight of the final stretchable nonwoven fabric. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were sequentially laminated to form a three-layer composite, and then rolled into a calendar roll with an embossing ratio of 11%. Bonding was performed. Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Comparative Example 1: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were manufactured, each containing 35 parts by weight of polypropylene and 65 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Comparative Example 2: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were manufactured, each containing 10 parts by weight of polypropylene and 90 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Comparative Example 3: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite is passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction is adjusted to 45% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Comparative Example 4: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multilayer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. . Next, the bonded composite is passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage rate in the CD direction is adjusted to 70% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

Comparative Example 5: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were prepared, each containing 22 parts by weight of polypropylene and 78 parts by weight of elastic raw material. A polypropylene meltblown nonwoven web was also produced at a ratio of 35 parts by weight to 100 parts by weight of the final stretchable nonwoven fabric. Here, as the stretching raw material, a copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 0.865 g/cm ³ was used. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were sequentially laminated to form a three-layer composite, and then rolled into a calendar roll with an embossing ratio of 11%. Bonding was performed. Next, the bonded composite was passed through a dryer that generates hot air set at a temperature of 150° C., and the shrinkage process rate in the CD direction was adjusted to 58% by applying tension in the MD direction and pulling it. A stretchable nonwoven fabric was produced.

The raw materials, compositions, manufacturing methods, and manufacturing conditions of the nonwoven fabrics manufactured in Examples 1 to 8 and Comparative Examples 1 to 5 are shown in Table 1 below. In Table 1 below, the content of elastic raw material and the content of polypropylene (PP) in the first spunbond nonwoven web or the second spunbond nonwoven web are respectively In the melt-blown nonwoven web, the content of PP is based on 100 parts by weight of the total weight of the entire nonwoven fabric.

Evaluation Example: Evaluation of Physical Properties of Nonwoven Fabrics The physical properties of the nonwoven fabrics produced in Examples 1 to 8 and Comparative Examples 1 to 5 were evaluated in the following manner, and the results are shown in Table 2 below.

(1) Elongation in the MD direction and elongation in the CD direction: Using a tensile strength elongation meter (manufactured by Instron) measuring equipment, the width of the test piece was 5 cm, the interval was 10 cm, and the tensile speed was measured according to the KSK 0520 method. A tensile test was conducted under the condition of 500 mm/min, and the elongation at maximum elongation was determined.

(2) CD direction stretch recovery property: CD direction stretch recovery property was evaluated by the method shown in FIG. 2 using a tensile strength elongation measuring device (manufactured by Instron). Specifically, the nonwoven fabrics produced in Examples 1 to 8 and Comparative Examples 1 to 5 were cut into pieces with a length in the CD direction of 30 mm and a width in the MD direction of 25 mm. was manufactured. Next, each nonwoven fabric sample was first stretched 100% in the CD direction at a speed of 500 mm/min using a pair of jigs (i.e., with an interval between the pair of jigs, the nonwoven fabric sample was (stretched to a length of 60 mm in the CD direction), maintained in this 100% stretched state for 1 minute, and after narrowing the gap between the pair of jigs and returning to the original position (i.e., after relaxing), Recovery was performed for 1 minute. Next, after secondarily stretching 100% in the CD direction at a speed of 500 mm/min, this 100% stretched state was maintained for 1 minute, and the distance between the pair of jigs was narrowed and the jig was placed in its original position ( i.e., after relaxation), the test was terminated.

Referring to FIG. 2, the stretch recovery in the CD direction is determined based on the starting point during secondary stretching. In other words, in the graph of Figure 2, a force (i.e., elongation force) is applied from the 20% point (i.e., length expanded by 20% from the original length = 30mm + 30mm * 0.2 = 36mm) during secondary elongation. , CD direction stretch recovery is recorded as 80%. In this case, no force was applied up to the 20% point during secondary elongation, indicating that about 20% of the CD direction stretch recovery was lost.

(3) Spinnability: It was observed whether or not the nonwoven web was broken, and if it was not broken, it was recorded as "good".

Referring to Table 1 above, the nonwoven fabrics manufactured in Examples 1 to 8 have an elongation in the MD direction of 40% or less, an elongation in the CD direction of 300 to 400%, and a good stretch recovery property in the CD direction. is 70% or more, indicating excellent spinnability.

On the other hand, the nonwoven fabrics manufactured in Comparative Examples 1 to 5 had an elongation in the MD direction of more than 40%, an elongation in the CD direction of less than 300% or more than 400%, or an elongation recovery property in the CD direction. It is shown that the spinnability is less than 70% and/or that the spinnability is poor.

Although the present invention has been described with reference to drawings and embodiments, this is by way of example only, and a person of ordinary skill in the art will appreciate that various modifications and equivalent modifications may be made thereto. It will be understood that it is possible to implement the following. Therefore, the true technical protection scope of the present invention must be determined by the technical idea of the claims.

Claims (18)

A stretchable nonwoven fabric having an elongation in the MD direction of 40% or less, an elongation in the CD direction of 300 to 400%, and a stretch recovery property in the CD direction of 70% or more. The stretchable nonwoven fabric of claim 1, wherein the stretchable nonwoven fabric comprises a single layer or multiple layers of spunbond nonwoven web. The stretchable nonwoven fabric according to claim 2, wherein the spunbond nonwoven web contains 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of stretch raw material. The stretchable nonwoven fabric according to claim ^{3, wherein the stretchable raw material includes a copolymer resin containing 85 to 90 parts by weight of polypropylene and 10 to 15 parts by weight of polyethylene, having a density of 0.860 to 0.870 g/cm 3} . . 5. The elastic raw material includes a copolymer resin containing 86.5 to 93 parts by weight of polypropylene and 7 to 13.5 parts by weight of polyethylene having a density of 0.860 to 0.870 g/ ^cm 3 . Stretchable non-woven fabric. 3. The stretchable nonwoven fabric of claim 2, wherein the stretchable nonwoven fabric comprises two layers of spunbond nonwoven web. 7. The stretchable nonwoven fabric of claim 6, wherein the stretchable nonwoven fabric includes a pair of spunbond nonwoven webs and a meltblown nonwoven web interposed therebetween. 8. The stretchable nonwoven fabric of claim 7, wherein the meltblown nonwoven web comprises polypropylene. The stretchable nonwoven fabric according to claim 7, wherein the content of the meltblown nonwoven web is 30 parts by weight or less based on 100 parts by weight of the stretchable nonwoven fabric. Stretchable nonwoven fabric according to claim 1, having a basis weight of 20 to 80 gsm. Step S10 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of elastic raw material to produce a spunbond nonwoven web;
Shrinking the spunbond nonwoven web in the CD direction at a CD shrinkage processing rate of 50 to 65%, S20;
A method for producing a stretchable nonwoven fabric, comprising: Between step S10 and step S20, a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of elastic raw material is spun to be laminated on the spunbond nonwoven web produced in step S10. The method for producing a stretchable nonwoven fabric according to claim 11, further comprising step S12 of producing another spunbond nonwoven web. Between the step S10 and the step S20, polypropylene is interposed between the spunbond nonwoven web manufactured in the step S10 and the spunbond nonwoven web manufactured in the step S12. 13. The method of making a stretchable nonwoven fabric according to claim 12, further comprising the step of spinning to produce a meltblown nonwoven web. The method of manufacturing a stretchable nonwoven fabric according to claim 11, further comprising a step S30 of passing the spunbond nonwoven web shrunk in the CD direction in the step S20 through a cooling roller and then winding it up. The method of manufacturing a stretchable nonwoven fabric according to claim 14, wherein in the step S30, the cooling roller is maintained at a temperature of 60 to 80°C. 11. The step S20 is performed by applying a tension of 20 to 50 N in the MD direction while drying the spunbond nonwoven web produced in the step S10 with hot air at a temperature of 120 to 150°C. A method for producing a stretchable nonwoven fabric as described in . An article comprising the stretchable nonwoven fabric according to any one of claims 1 to 10. 18. The article of claim 17, wherein the article includes a mask earband.