Stretchable nonwoven fabric, method for producing stretchable nonwoven fabric, and article including stretchable nonwoven fabric

Abstract

The present invention provides an elastic nonwoven fabric, a method for producing an elastic nonwoven fabric, and an article comprising the elastic nonwoven fabric, the elastic nonwoven fabric having an MD elongation of 40% or less, a CD elongation of 300-400%, and a CD stretch recovery of 70% or more.

Description

[Technical field]

[0001] The present invention relates to a stretchable nonwoven fabric, a method for producing a stretchable nonwoven fabric, and an article including a stretchable nonwoven fabric, and more particularly to a stretchable nonwoven fabric having excellent water absorbency and cool sensation performance, a method for producing a stretchable nonwoven fabric, and an article including a stretchable nonwoven fabric. [Background technology]

[0002] Most masks are fitted with earrings that are made of string-like ear bands.

[0003] Some specialized masks have nonwoven materials applied to the earrings, and in this case, materials made by laminating general nonwoven fabric and elastic film are generally applied. The reason is that string-like ear bands induce pain when worn for a long time, but if nonwoven materials are applied to the ear bands, pain will not be induced, and sales promotion activities can be carried out based on this.

[0004] The reason for combining a general nonwoven fabric with an elastic film is that the earring part must be stretchable when the mask is worn so that it can adhere closely to the skin and function as a mask.

[0005] In order to replace a material made by laminating a general nonwoven fabric with an elastic film with a pure nonwoven fabric, it must have elastic recovery without the elastic film. However, since general nonwoven fabrics do not have elastic recovery, there is a problem that they are difficult to apply to the earrings of masks. Summary of the Invention [Problem to be solved by the invention]

[0006] One embodiment of the present invention provides a stretchable nonwoven fabric having excellent CD stretch recovery.

[0007] Another embodiment of the present invention provides a method for producing the elastic nonwoven fabric.

[0008] Yet another embodiment of the present invention provides an article comprising the elastic nonwoven fabric. [Means for solving the problem]

[0009] One aspect of the present invention is The present invention provides a stretchable nonwoven fabric having an MD elongation of 40% or less, a CD elongation of 300 to 400%, and a CD stretch recovery of 70% or more.

[0010] The elastic nonwoven may comprise a single or multiple layer spunbond nonwoven web.

[0011] The spunbond nonwoven web may comprise 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of a stretch material.

[0012] The elastic material has a viscosity of 0.860 to 0.870 g / cm 3 The copolymer resin may contain 85 to 90 parts by weight of polypropylene having a density of 10 to 15 parts by weight of polyethylene.

[0013] The elastic material has a viscosity of 0.860 to 0.870 g / cm 3 The copolymer resin may contain 86.5 to 93 parts by weight of polypropylene having a density of 100 to 150 mm and 7 to 13.5 parts by weight of polyethylene.

[0014] The stretchable nonwoven may comprise two layers of a spunbond nonwoven web.

[0015] The elastic nonwoven fabric may include a pair of spunbond nonwoven webs and a meltblown nonwoven web sandwiched between them.

[0016] The meltblown nonwoven web may comprise polypropylene.

[0017] The content of the meltblown nonwoven web is 30 parts by weight or less based on 100 parts by weight of the elastic nonwoven fabric.

[0018] The elastic nonwoven also has a basis weight of 20 to 80 gsm.

[0019] Another aspect of the present invention is Step S10 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of an elastic material to produce a spunbond nonwoven web; A step S20 of shrinking the spunbond nonwoven web in the CD direction at a shrinkage processing rate of 50 to 65% in the CD direction; The present invention provides a method for producing a stretchable nonwoven fabric, comprising the steps of:

[0020] The method for producing the elastic nonwoven fabric may further include, between steps S10 and S20, a step S12 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of an elastic raw material to produce another spunbond nonwoven web so as to be laminated on the spunbond nonwoven web produced in step S10.

[0021] In addition, the method for producing an elastic nonwoven fabric may further include, between steps S10 and S20, a step S14 of spinning polypropylene to produce a meltblown nonwoven web to be interposed between the spunbond nonwoven web produced in step S10 and the spunbond nonwoven web produced in step S12.

[0022] The method for producing an elastic nonwoven fabric may further include step S30 of passing the spunbond nonwoven web shrunk in the CD direction in step S20 through a cooling roller and then winding it up.

[0023] In step S30, the cooling roller may be maintained at a temperature of 60 to 80°C.

[0024] The step S20 may also be performed by drying the spunbond nonwoven web produced in the step S10 with hot air at a temperature of 120 to 150° C. while applying a tension of 20 to 50 N in the MD direction.

[0025] Yet another aspect of the present invention is An article is provided that includes the stretchable nonwoven fabric.

[0026] The article may include a mask earband. Effect of the Invention

[0027] The elastic nonwoven fabric according to one embodiment of the present invention is restricted in elongation in the MD direction, and recovers to its original shape by 70% or more after elongation in the CD direction, making it usable for articles requiring elasticity such as mask earbands. [Brief description of the drawings]

[0028] [Figure 1] 1 is a diagram for explaining the definition of the term "CD direction shrinkage processing rate." [Diagram 2] 1 is a drawing for explaining the definition of the term "CD stretch recovery." DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an elastic nonwoven fabric according to an embodiment of the present invention will be described in detail.

[0030] In the present specification, the term "cross direction shrinkage rate" refers to the ratio of the length of a nonwoven fabric shrunk in the CD direction to the initial length when the nonwoven fabric is pulled while being dried with hot air and tension is applied in the MD direction as shown in Figure 1. Specifically, referring to Figure 1, the "cross direction shrinkage rate" can also be calculated by the following Equation 1.

[0031] [Number 1] Shrinkage rate in CD direction (%) = (Li-Lf) / Li*100

[0032] The elastic nonwoven fabric according to one embodiment of the present invention has an MD elongation of 40% or less, a CD elongation of 300-400%, and a CD stretch recovery of 70% or more. The elastic nonwoven fabric having MD elongation, CD elongation, and CD stretch recovery within the above ranges was developed by the present inventors for the first time, and is a novel nonwoven fabric that has never existed before.

[0033] The elastic nonwoven may comprise a single or multiple layer spunbond nonwoven web.

[0034] The spunbond nonwoven web may contain 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of stretchable raw material. When the content of the polypropylene and the stretchable raw material is within the above range, a stretchable nonwoven fabric having an MD elongation of 40% or less, a CD elongation of 300 to 400%, and a CD stretch recovery of 70% or more can be obtained.

[0035] The elastic material has a viscosity of 0.860 to 0.870 g / cm 3 For example, the stretchable material may contain 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 The copolymer resin may contain 86.5 to 93 parts by weight of polypropylene having a density of 100 to 150 mm and 7 to 13.5 parts by weight of polyethylene.

[0036] As an example, the elastic nonwoven fabric may include two layers of spunbonded nonwoven webs. For example, the elastic nonwoven fabric may be a composite nonwoven fabric having a multi-layer structure in which two layers of spunbonded nonwoven webs are stacked one on top of the other. In this case, the two layers of spunbonded nonwoven webs have the same basis weight.

[0037] As another example, the elastic nonwoven fabric may include a pair of spunbond nonwoven webs and a meltblown nonwoven web interposed therebetween. For example, the elastic nonwoven fabric may be a three-layer composite nonwoven fabric in which a first spunbond nonwoven web, a meltblown nonwoven web, and a second spunbond nonwoven web are laminated in order.

[0038] The meltblown nonwoven web may also include polypropylene. For example, the meltblown nonwoven web may be composed of polypropylene.

[0039] In the elastic nonwoven fabric, the content of the meltblown nonwoven web is 30 parts by weight or less per 100 parts by weight of the elastic nonwoven fabric. If the content of the meltblown nonwoven web is within the above range, an elastic nonwoven fabric can be obtained having an MD elongation of 40% or less, a CD elongation of 300 to 400%, and a CD stretch recovery of 70% or more.

[0040] Furthermore, the elastic nonwoven fabric has a basis weight of 20 to 80 gsm (g / m 2 ) as well.

[0041] Hereinafter, a method for producing an elastic nonwoven fabric according to an embodiment of the present invention will be described in detail.

[0042] A method for producing an elastic nonwoven fabric according to one embodiment of the present invention includes step S10 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of an elastic raw material to produce a spunbonded nonwoven web, and step S20 of shrinking the spunbonded nonwoven web in the CD direction at a shrinkage processing rate of 50 to 65% in the CD direction.

[0043] In step S10, if the contents of the polypropylene and the elastic raw material in the mixture are within the respective ranges, and in step S20, the CD shrink processing rate is within the respective ranges, an elastic nonwoven fabric is obtained having an MD elongation of 40% or less, a CD elongation of 300 to 400%, and a CD stretch recovery of 70% or more.

[0044] The stretchable raw material in step S10 is the same as the stretchable raw material in the stretchable nonwoven fabric-related portion described above.

[0045] The step S20 may also be performed by drying the spunbond nonwoven web produced in the step S10 with hot air at a temperature of 120 to 150° C. while applying a tension of 20 to 50 N in the MD direction.

[0046] In addition, the method for producing an elastic nonwoven fabric may further include, between steps S10 and S20, a step S12 of spinning a mixture of 15 to 30 parts by weight of polypropylene and 70 to 85 parts by weight of an elastic raw material to produce another spunbond nonwoven web so that the other spunbond nonwoven web is laminated on the spunbond nonwoven web produced in step S10.

[0047] The spunbond nonwoven web produced in step S12 may have the same composition as the spunbond nonwoven web produced in step S10.

[0048] Also, when the spunbond nonwoven web is produced in step S12, its basis weight can be adjusted to be the same as the basis weight of the spunbond nonwoven web produced in step S10.

[0049] Furthermore, the method for producing the elastic nonwoven fabric may further include, between steps S10 and S20, a step S14 of spinning polypropylene to produce a meltblown nonwoven web, which is interposed between the spunbond nonwoven web produced in step S10 and the spunbond nonwoven web produced in step S12.

[0050] When the meltblown nonwoven web is produced in step S14, its basis weight can be adjusted to be 30% or less of the basis weight of the final elastic nonwoven fabric.

[0051] In addition, when the method for producing an elastic nonwoven fabric includes step S12 or both steps S12 and S14, the method for producing an elastic nonwoven fabric may also include step S20' of shrinking the entire nonwoven web laminate in the CD direction at a CD shrinkage rate of 50 to 65%, instead of step S20 of shrinking the spunbond nonwoven web in the CD direction at a CD shrinkage rate of 50 to 65%.

[0052] Furthermore, the method for producing an elastic nonwoven fabric may further include step S30 of passing the spunbond nonwoven web shrunk in the CD direction in step S20 through a cooling roller and then winding it up.

[0053] In step S30, the cooling roller is also maintained at a temperature of 60 to 80°C.

[0054] Yet another embodiment of the present invention provides an article comprising the elastic nonwoven fabric.

[0055] The article may include a mask earband.

[0056] The present invention will be described in more detail with reference to the following examples. These examples are provided to more specifically explain the present invention, and the scope of the present invention is not limited to these examples. EXAMPLES

[0057] Example 1: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each of which had a polypropylene content of 22 parts by weight and an elastic raw material content of 78 parts by weight. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction and pulled, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0058] Example 2: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each of which had a polypropylene content of 30 parts by weight and an elastic raw material content of 70 parts by weight. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3 A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction and pulled, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0059] Example 3: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each of which had a polypropylene content of 15 parts by weight and an elastic raw material content of 85 parts by weight. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction and pulled, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0060] Example 4: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each of which had a polypropylene content of 22 parts by weight and an elastic raw material content of 78 parts by weight. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3 A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction to pull the composite, thereby adjusting the shrinkage processing rate in the CD direction to 50%, thereby producing an elastic nonwoven fabric.

[0061] Example 5: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each of which had a polypropylene content of 22 parts by weight and an elastic raw material content of 78 parts by weight. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction and pulled, thereby adjusting the shrinkage processing rate in the CD direction to 65%, thereby producing an elastic nonwoven fabric.

[0062] Example 6: Production of stretchable nonwoven fabric A nonwoven fabric having stretchability in the CD direction and minimal elongation in the MD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each having a polypropylene content of 22 parts by weight and a stretchable raw material content of 78 parts by weight. In addition, a polypropylene meltblown nonwoven web was produced in a ratio of 10 parts by weight per 100 parts by weight of the final stretchable nonwoven fabric. Here, the stretchable raw material had a viscosity of 0.865 g / cm. 3 A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbonded nonwoven web were laminated in order to form a three-layered composite, which was then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction to pull the composite, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0063] Example 7: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each having a polypropylene content of 22 parts by weight and an elastic raw material content of 78 parts by weight. In addition, a polypropylene meltblown nonwoven web was produced in a ratio of 20 parts by weight per 100 parts by weight of the final elastic nonwoven fabric. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3 A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbonded nonwoven web were laminated in order to form a three-layered composite, which was then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction to pull the composite, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0064] Example 8: Production of stretchable nonwoven fabric A nonwoven fabric having minimal elongation in the MD direction and elasticity in the CD direction was produced. Specifically, a first spunbond nonwoven web and a second spunbond nonwoven web were produced, each having a polypropylene content of 22 parts by weight and an elastic raw material content of 78 parts by weight. In addition, a polypropylene meltblown nonwoven web was produced in a ratio of 30 parts by weight per 100 parts by weight of the final elastic nonwoven fabric. Here, the elastic raw material had a viscosity of 0.865 g / cm. 3A copolymer resin containing 90 parts by weight of polypropylene having a density of and 10 parts by weight of polyethylene was used. The first spunbond nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbond nonwoven web were laminated in sequence to form a three-layer composite. After that, it was passed through a calendar roll having an embossing ratio of 11% to perform bonding. Next, while passing the bonded composite through a dryer that generates hot air set at a temperature of 150°C, tension was applied and pulled in the MD direction to adjust the CD direction shrinkage processing rate to 58%, and a stretchable nonwoven fabric was produced.

[0065] 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 produced, where the polypropylene content was 35 parts by weight and the stretchable raw material content was 65 parts by weight. Here, as the stretchable raw material, a copolymer resin containing 90 parts by weight of polypropylene having a density of 0.865 g / cm 3 A copolymer resin containing 90 parts by weight of polypropylene having a density of and 10 parts by weight of polyethylene was used. The first spunbond nonwoven web and the second spunbond nonwoven web were laminated to form a composite with a multi-layer structure. After that, it was passed through a calendar roll having an embossing ratio of 11% to perform bonding. Next, while passing the bonded composite through a dryer that generates hot air set at a temperature of 150°C, tension was applied and pulled in the MD direction to adjust the CD direction shrinkage processing rate to 58%, and a stretchable nonwoven fabric was produced.

[0066] 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 produced, where the polypropylene content was 10 parts by weight and the stretchable raw material content was 90 parts by weight. Here, as the stretchable raw material, 0.865 g / cm 3A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction and pulled, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0067] Comparative Example 3: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbonded nonwoven web and a second spunbonded nonwoven web were produced, each having a polypropylene content of 22 parts by weight and a stretch material content of 78 parts by weight. Here, the stretch material had a viscosity of 0.865 g / cm 3 A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction to pull the composite, thereby adjusting the shrinkage processing rate in the CD direction to 45%, thereby producing an elastic nonwoven fabric.

[0068] Comparative Example 4: Production of nonwoven fabric A nonwoven fabric was produced. Specifically, a first spunbonded nonwoven web and a second spunbonded nonwoven web were produced, each having a polypropylene content of 22 parts by weight and a stretch material content of 78 parts by weight. Here, the stretch material had a viscosity of 0.865 g / cm 3A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web and the second spunbonded nonwoven web were laminated to form a composite with a multi-layer structure, and then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction to pull the composite, thereby adjusting the shrinkage processing rate in the CD direction to 70%, thereby producing an elastic nonwoven fabric.

[0069] 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 produced, each having a polypropylene content of 22 parts by weight and a stretch material content of 78 parts by weight. In addition, a polypropylene meltblown nonwoven web was produced in a ratio of 35 parts by weight per 100 parts by weight of the final stretchable nonwoven fabric. Here, the stretch material had a viscosity of 0.865 g / cm. 3 A copolymer resin containing 90 parts by weight of polypropylene and 10 parts by weight of polyethylene having a density of 1000 nm was used. The first spunbonded nonwoven web, the polypropylene meltblown nonwoven web, and the second spunbonded nonwoven web were laminated in order to form a three-layered composite, which was then passed through a calendar roll having an embossing ratio of 11% to perform bonding. The bonded composite was then passed through a dryer generating hot air set at a temperature of 150°C, while tension was applied in the MD direction to pull the composite, thereby adjusting the shrinkage processing rate in the CD direction to 58%, thereby producing an elastic nonwoven fabric.

[0070] 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 the stretch raw material and the content of polypropylene (PP) in the first spunbond nonwoven web or the second spunbond nonwoven web are based on 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 PP in the meltblown nonwoven web is based on 100 parts by weight of the total weight of the entire nonwoven fabric.

[0071] [Table 1]

[0072] Evaluation example: Evaluation of the physical properties of nonwoven fabric The physical properties of the nonwoven fabrics prepared in Examples 1 to 8 and Comparative Examples 1 to 5 were evaluated by the following methods, and the results are shown in Table 2 below.

[0073] (1) Elongation in MD and CD: Using a tensile strength tester (manufactured by Instron) measuring equipment, tensile tests were performed according to the KSK 0520 method under conditions of a test piece width of 5 cm, spacing of 10 cm, and a tensile speed of 500 mm / min, and the elongation at maximum elongation was determined.

[0074] (2) CD stretch recovery: Using a tensile strength tester (manufactured by Instron) measuring equipment, CD stretch recovery was evaluated according to the method shown in Fig. 2. Specifically, the nonwoven fabrics produced in Examples 1 to 8 and Comparative Examples 1 to 5 were cut to have a length of 30 mm in the CD direction and a width of 25 mm in the MD direction to produce nonwoven fabric specimens. Next, each nonwoven fabric specimen was first stretched 100% in the CD direction at a speed of 500 mm / min using a pair of jigs (i.e., the gap between the pair of jigs was opened and the nonwoven fabric specimen was stretched to a length of 60 mm in the CD direction), and then maintained in this 100% stretched state for 1 minute, and the gap between the pair of jigs was narrowed to return the specimen to its original position (i.e., after relaxation), and recovery was performed for 1 minute. Next, the specimen was secondarily stretched to 100% in the CD direction at a speed of 500 mm / min, and then maintained in this 100% stretched state for 1 minute. The gap between the pair of jigs was then narrowed to return the specimen to its original position (i.e., after relaxation), and the test was then terminated.

[0075] Referring to Figure 2, the CD stretch recovery is determined based on the starting point of the secondary stretch. That is, in the graph of Figure 2, a force (i.e., elongation force) is applied from the 20% point (i.e., the length stretched 20% from the original length = 30mm + 30mm * 0.2 = 36mm) during the secondary stretch, so the CD stretch recovery is recorded as 80%. In this case, it can be seen that no force is applied up to the 20% point during the secondary stretch, and the CD stretch recovery is lost by about 20%.

[0076] (3) Spinnability: The nonwoven web was observed to see if it broke, and if it did not break, it was recorded as "good."

[0077] [Table 2]

[0078] Referring to Table 1, the nonwoven fabrics produced in Examples 1 to 8 have an MD elongation of 40% or less, a CD elongation of 300 to 400%, a CD stretch recovery of 70% or more, and excellent spinnability.

[0079] On the other hand, the nonwoven fabrics produced in Comparative Examples 1 to 5 are shown to have MD elongation exceeding 40%, CD elongation less than 300% or exceeding 400%, CD stretch recovery less than 70%, and / or poor spinnability.

[0080] The present invention has been described with reference to the drawings and examples, but these are merely illustrative, and a person skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical ideas of the claims.

Claims

1. A stretchable nonwoven fabric having an MD elongation of 40% or less, a CD elongation of 300 to 400%, and a CD stretch recovery of 70% or more, the fabric comprising a single-layer or multi-layer spunbonded nonwoven web, The spunbond nonwoven web comprises 15 to 30 parts by weight of a first polypropylene and 70 to 85 parts by weight of a stretch material; The stretchable material has a viscosity of 0.860 to 0.870 g / cm ３ a copolymer resin comprising 85 to 90 parts by weight of a second polypropylene having a density of 10 to 15 parts by weight of polyethylene; Stretchable non-woven fabric.

2. The stretchable material has a viscosity of 0.860 to 0.870 g / cm ３ 2. The stretchable nonwoven fabric of claim 1, comprising a copolymer resin comprising 86.5 to 90 parts by weight of a second polypropylene having a density of 10 to 13.5 parts by weight of polyethylene.

3. 10. The stretchable nonwoven fabric of claim 1, wherein the stretchable nonwoven fabric comprises two layers of a spunbond nonwoven web.

4. The elastic nonwoven fabric of claim 3 , wherein the elastic nonwoven fabric comprises a pair of spunbond nonwoven webs and a meltblown nonwoven web sandwiched therebetween.

5. 5. The stretchable nonwoven fabric of claim 4, wherein the meltblown nonwoven web comprises a third polypropylene.

6. The elastic nonwoven fabric of claim 4, wherein the content of the meltblown nonwoven web is 30 parts by weight or less per 100 parts by weight of the elastic nonwoven fabric.

7. 2. The stretchable nonwoven fabric of claim 1, having a basis weight of 20 to 80 gsm.

8. A step S10 of spinning a mixture of 15 to 30 parts by weight of a first polypropylene and 70 to 85 parts by weight of a stretch material to produce a spunbond nonwoven web; S20 shrinking the spunbond nonwoven web in a CD direction at a shrinkage rate of 50 to 65%; A method for producing an elastic nonwoven fabric, comprising: The stretchable material has a viscosity of 0.860 to 0.870 g / cm ３ and a copolymer resin comprising 85 to 90 parts by weight of a second polypropylene having a density of 10 to 15 parts by weight of polyethylene.

9. The method for producing an elastic nonwoven fabric according to claim 8, further comprising a step S12 between steps S10 and S20, of spinning a mixture of 15 to 30 parts by weight of a second polypropylene and 70 to 85 parts by weight of an elastic raw material to be laminated on the spunbond nonwoven web produced in step S10, to produce another spunbond nonwoven web.

10. The method for producing an elastic nonwoven fabric according to claim 9, further comprising a step 14 between steps S10 and S20, of spinning a third polypropylene to produce a meltblown nonwoven web so as to be interposed between the spunbond nonwoven web produced in step S10 and the spunbond nonwoven web produced in step S12.

11. The method for producing an elastic nonwoven fabric according to claim 8, further comprising a step S30 of passing the spunbond nonwoven web contracted in the CD direction in step S20 through a cooling roller and then winding the web.

12. The method of claim 11, wherein in step S30, the cooling roller is maintained at a temperature of 60 to 80° C.

13. The method for producing an elastic nonwoven fabric according to claim 8, wherein step S20 is performed by applying a tension of 20 to 50 N in an MD direction to the spunbond nonwoven web produced in step S10 while drying the spunbond nonwoven web with hot air at a temperature of 120 to 150° C.

14. An article comprising the elastic nonwoven fabric according to any one of claims 1 to 7.

15. The article of claim 14 , wherein the article comprises a mask earband.

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