Composite nonwoven fabric and articles containing the same

Abstract

A composite nonwoven fabric and an article comprising the same are disclosed. The disclosed composite nonwoven fabric comprises a first spunbond nonwoven fabric, a second spunbond nonwoven fabric, and a third spunbond nonwoven fabric, in this order, and the second spunbond nonwoven fabric comprises 80 to 99.9 parts by weight of an elastic material and 0.1 to 20 parts by weight of a non-elastic material.

Description

[Technical Field]

[0001] The present invention relates to a composite nonwoven fabric and an article including the same, and more particularly to a composite nonwoven fabric that is soft to the touch and highly elastic, and an article including the same. [Background technology]

[0002] Conventional spunbond nonwoven fabrics lack elasticity and lose only 30-40% of their recovery force after being stretched more than once. This means that conventional spunbond nonwoven fabrics cannot be used for waistbands of panty diapers or sanitary napkins, which require elasticity. Summary of the Invention [Problem to be solved by the invention]

[0003] One embodiment of the present invention provides a composite nonwoven fabric that is soft to the touch and highly elastic.

[0004] Another embodiment of the present invention provides an article comprising the composite nonwoven fabric. [Means for solving the problem]

[0005] One aspect of the present invention is The fabric includes a first spunbond nonwoven fabric, a second spunbond nonwoven fabric, and a third spunbond nonwoven fabric, in this order; The second spunbond nonwoven fabric is a composite nonwoven fabric containing 80 to 99.9 parts by weight of an elastic material and 0.1 to 20 parts by weight of a non-elastic material.

[0006] The first spunbond nonwoven fabric and the third spunbond nonwoven fabric may each include sheath-core fibers.

[0007] Each of the sheath-core fibers may independently contain 50 to 90 parts by weight of a core and 10 to 50 parts by weight of a sheath.

[0008] The core may contain 20 to 50 parts by weight of elastic material and 50 to 80 parts by weight of non-elastic material, and the sheath may contain 70 to 93 parts by weight of elastic material, 4 to 20 parts by weight of non-elastic material, and 3 to 10 parts by weight of softener.

[0009] The composite nonwoven fabric may contain 70 to 95 parts by weight of elastic raw material and 5 to 30 parts by weight of non-elastic raw material.

[0010] The elastic material may include an olefin block copolymer, a styrene-based elastomer, a polyolefin-based elastomer, a polyester-based elastomer, a polyurethane-based elastomer, or a combination thereof.

[0011] The non-elastic material may include polyethylene, polypropylene, polyester, polyamide, or combinations thereof.

[0012] The softening agent may include an erucamide-based softening agent, a wax emulsion, a reactive softening agent, a silicone-based softening agent, a surfactant, an ester compound, an ethylene bisstearamide-based softening agent, an ethylene-propylene random copolymer, an ethylene-butene-propylene copolymer, or a combination thereof.

[0013] The composite nonwoven fabric has a permanent deformation rate of 15% or less.

[0014] The composite nonwoven fabric has a basis weight of 10 to 100 g / m 2 It is also.

[0015] The composite nonwoven fabric also has an embossing rate of 11 to 18%.

[0016] The composite nonwoven fabric may include a plurality of the second spunbond nonwoven fabrics between the first spunbond nonwoven fabric and the third spunbond nonwoven fabric.

[0017] Another aspect of the present invention provides an article comprising the composite nonwoven fabric.

[0018] The article may comprise the waistband of a panty-type diaper or the waistband of a panty-type sanitary napkin. [Effects of the Invention]

[0019] The composite nonwoven fabric according to one embodiment of the present invention has a soft feel and high elasticity, and can be used for the waistbands of panty-type diapers or sanitary napkins, which require stretchability. In addition, articles including the composite nonwoven fabric can provide consumers with excellent elasticity, a comfortable wearing experience, and a soft feel. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a cross-sectional view of a composite nonwoven fabric according to a first embodiment of the present invention. [Figure 2] FIG. 3 is a cross-sectional view of a composite nonwoven fabric according to a second embodiment of the present invention. [Figure 3] 1 is a diagram for explaining the definition of the term "permanent deformation rate" and a method for measuring the same. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, a composite nonwoven fabric according to one embodiment of the present invention will be described in detail.

[0022] A composite nonwoven fabric according to one embodiment of the present invention comprises a first spunbond nonwoven fabric, a second spunbond nonwoven fabric, and a third spunbond nonwoven fabric, in this order.

[0023] The first spunbond nonwoven fabric and the third spunbond nonwoven fabric may each include sheath-core fibers.

[0024] Each of the sheath-core fibers may independently contain 50 to 90 parts by weight of a core and 10 to 50 parts by weight of a sheath.

[0025] The core may contain 20 to 50 parts by weight of elastic material and 50 to 80 parts by weight of non-elastic material.

[0026] The sheath may contain 70 to 93 parts by weight of elastic raw material, 4 to 20 parts by weight of non-elastic raw material, and 3 to 10 parts by weight of softener.

[0027] The composite nonwoven fabric may contain 70 to 95 parts by weight of elastic raw material and 5 to 30 parts by weight of non-elastic raw material.

[0028] The elastic material may include an olefin block copolymer, a styrene-based elastomer, a polyolefin-based elastomer, a polyester-based elastomer, a polyurethane-based elastomer, or a combination thereof.

[0029] The non-elastic material may include polyethylene, polypropylene, polyester, polyamide, or combinations thereof.

[0030] The softening agent may include an erucamide-based softening agent, a wax emulsion, a reactive softening agent, a silicone-based softening agent, a surfactant, an ester compound, an ethylene bisstearamide-based softening agent, an ethylene-propylene random copolymer, an ethylene-butene-propylene copolymer, or a combination thereof.

[0031] The composite nonwoven fabric according to one embodiment of the present invention having the above-described configuration has the advantages of being soft to the touch due to its low permanent deformation rate and low coefficient of friction, low MD elongation, and high MD tensile strength.

[0032] Furthermore, the elastic raw material has a characteristic sticky feeling, which may cause discomfort to consumers. However, by changing the composition of each layer during the production of the composite nonwoven fabric and applying a softener, the sticky feeling of the elastic raw material can be offset, thereby providing a composite nonwoven fabric that feels soft and can be easily stretched by consumers when using an article containing the composite nonwoven fabric.

[0033] The composite nonwoven fabric has a permanent deformation rate of 15% or less.

[0034] The composite nonwoven fabric has a basis weight of 10 to 100 g / m 2 It is also.

[0035] The composite nonwoven fabric also has an embossing rate of 11 to 18%.

[0036] The composite nonwoven fabric may include a plurality of the second spunbond nonwoven fabrics between the first spunbond nonwoven fabric and the third spunbond nonwoven fabric.

[0037] FIG. 1 is a cross-sectional view of a composite nonwoven fabric 10 according to a first embodiment of the present invention.

[0038] Referring to FIG. 1, a composite nonwoven fabric 10 according to a first embodiment of the present invention includes a first spunbond nonwoven fabric 11, a second spunbond nonwoven fabric 12, and a third spunbond nonwoven fabric 13 in this order.

[0039] FIG. 2 is a cross-sectional view of a composite nonwoven fabric 20 according to a second embodiment of the present invention.

[0040] Referring to FIG. 2, a composite nonwoven fabric 20 according to a second embodiment of the present invention includes a first spunbond nonwoven fabric 21, a second spunbond nonwoven fabric 22, a third spunbond nonwoven fabric 23, and a fourth spunbond nonwoven fabric 24 in this order.

[0041] The first spunbond nonwoven fabric 21 and the fourth spunbond nonwoven fabric 24 provided in the composite nonwoven fabric 20 of Figure 2 can have the same configuration as the first spunbond nonwoven fabric 11 and the third spunbond nonwoven fabric 13 provided in the composite nonwoven fabric 10 of Figure 1, respectively.

[0042] 1. The second spunbond nonwoven fabric 22 and the third spunbond nonwoven fabric 23 provided in the composite nonwoven fabric 20 of FIG. 2 may have the same configuration as the second spunbond nonwoven fabric 12 provided in the composite nonwoven fabric 10 of FIG.

[0043] Articles containing the above-described composite nonwoven fabric will now be described in detail.

[0044] The article may comprise the waistband of a panty-type diaper or the waistband of a panty-type sanitary napkin.

[0045] The present invention will be described in more detail with reference to the following examples. These examples are provided to more specifically illustrate the present invention, and the scope of the present invention is not limited to these examples. [Example]

[0046] Example 1: Preparation of composite nonwoven fabric A composite nonwoven fabric was produced which contained a first spunbond nonwoven fabric, a second spunbond nonwoven fabric and a third spunbond nonwoven fabric in this order.

[0047] Specifically, the first spunbond nonwoven fabric and the third spunbond nonwoven fabric each contain sheath-core fibers. More specifically, each of the sheath-core fibers contains 70 parts by weight of a core and 30 parts by weight of a sheath. More specifically, the core contains 35 parts by weight of an elastic material and 65 parts by weight of a non-elastic material, and the sheath contains 82 parts by weight of an elastic material, 12 parts by weight of a non-elastic material, and 6 parts by weight of a softener.

[0048] The second spunbond nonwoven fabric contains 90 parts by weight of an elastic material and 10 parts by weight of a non-elastic material.

[0049] The composite nonwoven fabric also contains 82 parts by weight of elastic material and 18 parts by weight of non-elastic material.

[0050] In the first spunbond nonwoven fabric, the second spunbond nonwoven fabric, and the third spunbond nonwoven fabric, the elastic raw material is an olefin block copolymer (Infuse®, manufactured by Dow Chemical Company). TM ) was used, polypropylene was used as the non-elastic raw material, and an erucamide-based softener was used as the softener.

[0051] The first spunbond nonwoven fabric, the second spunbond nonwoven fabric, and the third spunbond nonwoven fabric were laminated to form a multi-layer composite, which was then passed through a calender roll with an embossing ratio of 11% to perform bonding, resulting in a composite nonwoven fabric.

[0052] Example 2: Preparation of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core-sheath fiber in each of the first and third spunbond nonwoven fabrics was changed to 50 parts by weight of the core and 50 parts by weight of the sheath.

[0053] Example 3: Preparation of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core-sheath fiber in each of the first and third spunbond nonwoven fabrics was changed to 90 parts by weight of the core and 10 parts by weight of the sheath.

[0054] Example 4: Preparation of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core of each of the first and third spunbond nonwoven fabrics was changed to 20 parts by weight of elastic material and 80 parts by weight of non-elastic material.

[0055] Example 5: Preparation of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core of each of the first and third spunbond nonwoven fabrics was changed to 50 parts by weight of elastic raw material and 50 parts by weight of non-elastic raw material.

[0056] Example 6: Preparation of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the sheath of each of the first and third spunbond nonwoven fabrics was changed to 70 parts by weight of elastic raw material, 20 parts by weight of non-elastic raw material, and 10 parts by weight of softener.

[0057] Example 7: Preparation of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the sheath of each of the first and third spunbond nonwoven fabrics was changed to 93 parts by weight of elastic raw material, 4 parts by weight of non-elastic raw material, and 3 parts by weight of softener.

[0058] Example 8: Preparation of composite nonwoven fabric A composite nonwoven fabric was produced in the same manner as in Example 1, except that the second spunbond nonwoven fabric was produced using 80 parts by weight of elastic raw material and 20 parts by weight of non-elastic raw material.

[0059] Example 9: Preparation of composite nonwoven fabric A composite nonwoven fabric was prepared in the same manner as in Example 1, except that the second spunbond nonwoven fabric was prepared using 99.9 parts by weight of elastic raw material and 0.1 parts by weight of non-elastic raw material.

[0060] Example 10: Preparation of composite nonwoven fabric A composite nonwoven fabric was prepared in the same manner as in Example 1, except that the other components were kept unchanged and the composite nonwoven fabric contained 70 parts by weight of elastic raw material and 30 parts by weight of non-elastic raw material.

[0061] Example 11: Preparation of composite nonwoven fabric A composite nonwoven fabric was prepared in the same manner as in Example 1, except that the other components were kept unchanged and the composite nonwoven fabric contained 95 parts by weight of elastic raw material and 5 parts by weight of non-elastic raw material.

[0062] Comparative Example 1: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core-sheath fiber in each of the first and third spunbond nonwoven fabrics was changed to 45 parts by weight of the core and 55 parts by weight of the sheath.

[0063] Comparative Example 2: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core-sheath fiber in each of the first and third spunbond nonwoven fabrics was changed to 95 parts by weight of the core and 5 parts by weight of the sheath.

[0064] Comparative Example 3: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core of each of the first and third spunbond nonwoven fabrics was changed to 10 parts by weight of elastic material and 90 parts by weight of non-elastic material.

[0065] Comparative Example 4: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the core of each of the first and third spunbond nonwoven fabrics was changed to 60 parts by weight of elastic material and 40 parts by weight of non-elastic material.

[0066] Comparative Example 5: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the sheath of each of the first and third spunbond nonwoven fabrics was changed to 65 parts by weight of elastic raw material, 25 parts by weight of non-elastic raw material, and 10 parts by weight of softener.

[0067] Comparative Example 6: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the sheath of each of the first and third spunbond nonwoven fabrics was changed to 65 parts by weight of elastic material, 20 parts by weight of non-elastic material, and 15 parts by weight of softener.

[0068] Comparative Example 7: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the sheath of each of the first and third spunbond nonwoven fabrics was changed to 95 parts by weight of elastic raw material, 2 parts by weight of non-elastic raw material, and 3 parts by weight of softener.

[0069] Comparative Example 8: Production of composite nonwoven fabric Composite nonwoven fabrics were produced in the same manner as in Example 1, except that the composition of the sheath of each of the first and third spunbond nonwoven fabrics was changed to 93 parts by weight of elastic raw material, 6 parts by weight of non-elastic raw material, and 1 part by weight of softener.

[0070] Comparative Example 9: Production of composite nonwoven fabric A composite nonwoven fabric was produced in the same manner as in Example 1, except that the second spunbond nonwoven fabric was produced using 70 parts by weight of elastic raw material and 30 parts by weight of non-elastic raw material.

[0071] Comparative Example 10: Production of composite nonwoven fabric A composite nonwoven fabric was prepared in the same manner as in Example 1, except that the amounts of the elastic raw material and the non-elastic raw material were changed to 99.95 parts by weight and 0.05 parts by weight, respectively, when preparing the second spunbond nonwoven fabric.

[0072] Comparative Example 11: Production of composite nonwoven fabric A composite nonwoven fabric was prepared in the same manner as in Example 1, except that the other components were kept unchanged and the composite nonwoven fabric contained 65 parts by weight of elastic raw material and 35 parts by weight of non-elastic raw material.

[0073] Comparative Example 12: Production of composite nonwoven fabric A composite nonwoven fabric was prepared in the same manner as in Example 1, except that the other components were kept unchanged and the composite nonwoven fabric contained 97 parts by weight of elastic raw material and 3 parts by weight of non-elastic raw material.

[0074] The structures of the composite nonwoven fabrics produced in Examples 1 to 11 (EX1 to EX11) and Comparative Examples 1 to 12 (CX1 to CX12) are shown in Table 1 below.

[0075] [Table 1]

[0076] Evaluation example: Evaluation of the physical properties of nonwoven fabric The physical properties of the nonwoven fabrics prepared in Examples 1 to 11 and Comparative Examples 1 to 12 were evaluated by the following methods, and the results are shown in Table 2 below.

[0077] (1) MD elongation and MD tensile strength: Using a tensile strength tester (Instron) measuring equipment, a tensile test was carried out according to the KSK0520 method under the 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 and maximum tensile load were determined.

[0078] (2) Permanent Set Rate (%): The permanent set rate was evaluated using a tensile strength tester (Instron) according to the method shown in Figure 3. Specifically, nonwoven fabric specimens were prepared by cutting each of the nonwoven fabrics prepared in Examples 1 to 11 and Comparative Examples 1 to 12 to a length of 100 mm in the CD direction and a width of 50 mm in the MD direction. Each nonwoven fabric specimen was then stretched 100% in the CD direction at a speed of 500 mm / min using a pair of jigs (i.e., the distance between the jigs was increased to stretch the nonwoven fabric specimen to a length of 200 mm in the CD direction). This 100% stretched state was maintained for 30 seconds, and the distance between the jigs was then reduced to return the specimen to its original position (i.e., after relaxation), and the specimen was allowed to recover for 1 minute. Then, the specimen was secondarily stretched to 100% in the CD direction at a speed of 500 mm / min, and held at 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 terminated.

[0079] Referring to Figure 3, the permanent deformation is determined as the point at which the secondary elongation strength increases. That is, in the graph of Figure 3, force (i.e., elongation force) is applied from the 38% point during the secondary elongation, so the permanent deformation is recorded as 38%. The permanent deformation can be measured when the elongation is 100% or more.

[0080] (3) Coefficient of friction (μs): The coefficient of friction of the nonwoven fabric was measured using a TOYOSEIKI TR-2 in accordance with ASTM D 1894.

[0081] (4) Radioactivity: It was observed whether the nonwoven fabric was broken or not, and if it was not broken, it was recorded as "good."

[0082] [Table 2]

[0083] Referring to Table 2, it was found that the composite nonwoven fabrics prepared in Examples 1 to 11 had an MD elongation of 120% or more, an MD strength of 25 N / 5 cm or more, a permanent deformation rate of 15% or less, and excellent radioactivity.

[0084] On the other hand, the composite nonwoven fabrics produced in Comparative Examples 1 to 12 had MD elongation of less than 120%, MD strength of less than 25 N / 5 cm, permanent deformation rate of more than 15%, poor emissivity, and / or were unproducible.

[0085] Although the present invention has been described based on the drawings and embodiments, 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 protection of the present invention should be determined by the technical spirit of the claims. [Explanation of symbols]

[0086] 10, 20 Composite nonwoven fabric 11-13, 21-24 Spunbond nonwoven fabric

Claims

1. The fabric includes a first spunbond nonwoven fabric, a second spunbond nonwoven fabric, and a third spunbond nonwoven fabric, in this order; The second spunbond nonwoven fabric is a composite nonwoven fabric comprising 80 to 99.9 parts by weight of an elastic material and 0.1 to 20 parts by weight of a non-elastic material.

2. The composite nonwoven fabric of claim 1 , wherein the first spunbond nonwoven fabric and the third spunbond nonwoven fabric each comprise sheath-core fibers.

3. 3. The composite nonwoven fabric according to claim 2, wherein each of the core-sheath fibers independently comprises 50 to 90 parts by weight of a core portion and 10 to 50 parts by weight of a sheath portion.

4. 4. The composite nonwoven fabric according to claim 3, wherein the core comprises 20 to 50 parts by weight of an elastic raw material and 50 to 80 parts by weight of a non-elastic raw material, and the sheath comprises 70 to 93 parts by weight of an elastic raw material, 4 to 20 parts by weight of a non-elastic raw material, and 3 to 10 parts by weight of a softener.

5. 2. The composite nonwoven fabric of claim 1, wherein the composite nonwoven fabric comprises 70 to 95 parts by weight of an elastic material and 5 to 30 parts by weight of a non-elastic material.

6. 2. The composite nonwoven fabric according to claim 1, wherein the elastic material comprises an olefin block copolymer, a styrene-based elastomer, a polyolefin-based elastomer, a polyester-based elastomer, a polyurethane-based elastomer, or a combination thereof.

7. 10. The composite nonwoven fabric of claim 1, wherein the non-elastic material comprises polyethylene, polypropylene, polyester, polyamide, or a combination thereof.

8. 5. The composite nonwoven fabric according to claim 4, wherein the softening agent comprises an erucamide-based softening agent, a wax emulsion, a reactive softening agent, a silicone-based softening agent, a surfactant, an ester compound, an ethylene bisstearamide-based softening agent, an ethylene-propylene random copolymer, an ethylene-butene-propylene copolymer, or a combination thereof.

9. 2. The composite nonwoven fabric according to claim 1, which has a permanent deformation rate of 15% or less.

10. Basis weight: 10 to 100 g / m ２ The composite nonwoven fabric according to claim 1,

11. 2. The composite nonwoven fabric according to claim 1, wherein the embossing rate is 11 to 18%.

12. The composite nonwoven fabric according to claim 1 , wherein a plurality of the second spunbond nonwoven fabrics are provided between the first spunbond nonwoven fabric and the third spunbond nonwoven fabric.

13. An article comprising the composite nonwoven fabric of any one of claims 1 to 12.

14. The article of claim 13, wherein the article comprises a waistband of a panty-type diaper or a panty-type sanitary napkin.

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