KR20140140295A - The elastic nonwoven fabric having a low melting contact point formed by structure and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an elastic nonwoven fabric in a vertical structure in which a cross elastic nonwoven fabric is folded at constant width and, more specifically, to an elastic nonwoven fabric in a vertical structure having a low melting contact point and to a manufacturing method thereof. The elastic nonwoven fabric is formed as an elastic composite fiber of a low melting point is attached on an upper part and a lower part of a polyester-based elastic non-woven fabric including an elastic composite fiber. A part folded by the vertical structure forms a low melting contact point by adjoining with the elastic composite fiber of the low melting point, improves adhesive force, and stabilizes a form of the nonwoven fabric. Accordingly, the present invention improves delamination intensity and a repeated compression recovery ratio.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vertical elastic nonwoven fabric having a low melting point contact and a method of manufacturing the same. BACKGROUND ART < RTI ID = 0.0 > [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic nonwoven fabric having a low melting point contact formed with a vertical structure, and more particularly, to a nonwoven fabric having a low melting point contact having an improved adhesion strength, .

Nonwoven fabrics are widely used as a kind of fiber structure. Non-woven fabrics refer to fabrics made by mechanical bonding or by bonding or tangling fibers using thermal bonding or chemical agents. A felt, a nonwoven fabric, a needle punch, a spun bond, a spun lace, an embossed film, and a wet (nonwoven) nonwoven fabric. The term " web " refers to a structure in which the fibers are randomly bonded to each other and the contacts of the fibers are adhered to each other by resin to be used for wicking.

Such a nonwoven fabric can be selected from raw materials, preparation methods, processing methods and the like depending on the purpose of use, and is widely used in many fields. In recent years, nonwoven fabrics using polyester staple fibers as a material replacing urethane have been used as bedding, It is used in a wide range of applications such as insulation materials and filters, and its use is gradually expanding. Therefore, development of nonwoven fabric having high physical properties such as shape stability, elastic recovery rate and compression rebound characteristics including durability is more demanded due to expansion of applications.

Korean Patent No. 1183146 discloses a nonwoven fabric which is formed from mixed fibers comprising a high-melting-point polyester fiber, a low-melting-point modified polyester fiber, and a stretchable composite fiber composed of two or more polyesters having different heat shrinkability, . However, the cushioning material prepared as described above has a disadvantage that the shape restoring force is deteriorated at the time of long-term compression because the non-woven fabric layer is simply formed on one side of the mono-layer.

In the conventional nonwoven fabric produced by laminating the webs as described above, the fibers are aligned in parallel in the horizontal direction, so that the non-woven fabric has a low rebound characteristic in the vertical direction and has a weak pressure from the upper and lower sides.

Therefore, in order to solve the above problems, a method of producing a vertical elastic nonwoven fabric in which fibers are oriented in the thickness direction (vertical direction) is used, unlike the case where the fibers are oriented in parallel (horizontal direction) in the cross-section direction of the nonwoven fabric. In the vertical elastic nonwoven fabric, a cross-elastic nonwoven fabric in which constituent fibers are arranged parallel to the paper surface is prepared, and then the nonwoven fabric is folded at a predetermined width and the shape is fixed through a heat treatment process. However, the conventional nonwoven fabric having a vertical structure has excellent elastic recovery force and initial elasticity against the pressure applied in the vertical direction due to the vertical arrangement of the constituent fibers, but there is a problem in that it is insufficient in terms of deformation at the side or resilience at the time of long- there was. In addition, the shape of the folded portion of the nonwoven fabric is not stable due to the elasticity of the nonwoven fabric, and it is difficult to maintain the vertical structure, so that a high adhesive force is required at the folded portion.

In order to solve the above problems, it is an object of the present invention to provide a vertical elastic nonwoven fabric having an improved structure stability and an improved shape stability of the vertical elastic nonwoven fabric itself by increasing the adhesive force with the neighboring nonwoven fabric at the time of forming the vertical elastic nonwoven fabric .

It is also an object of the present invention to provide a vertical elastic nonwoven fabric which is improved in peel strength in vertical and horizontal directions and in repeated compression recovery rate.

In order to solve the above-mentioned problems, the present invention provides a method of manufacturing a polyester elastic nonwoven fabric, comprising: forming a vertical elastic nonwoven fabric having a vertical structure by arranging constituent fibers in a vertical direction by folding a cross- , And a low melting point contact point is formed by a low melting point elastic nonwoven fabric at a portion where the elastic nonwoven fabric surfaces are adjacent to each other due to the folding by the vertical structure, thereby forming a low melting point contact point.

The present invention also provides a vertical elastic nonwoven fabric having a low melting point contact, characterized in that the length (h) of a portion where the elastic nonwoven fabric faces are adjacent to each other in the vertical structure is 5 to 200 mm.

The polyester-based elastic nonwoven fabric preferably contains 50 to 85% by weight of polyester fibers having an intrinsic viscosity of 0.50 to 0.69 dl / g, a low-melting polyester elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g, And 15 to 50% by weight of a low-melting-point elastic composite fiber made of a polyester-based polymer having a viscosity of 0.50 to 0.80 dl / g.

The low-melting-point elastic composite fiber is composed of fibers having any one of a side-by-side type, a sheath-core type and an eccentric sheath-core type. to provide.

The present invention also relates to a method for producing a vertical elastic nonwoven fabric having a low melting point contact characterized by comprising a polyester fiber or a low melting point elastic conjugated fiber or a polyester fiber and a low melting point elastic conjugated fiber containing a flame retardant or an antibacterial agent, to provide.

The low-melting-point elastic nonwoven fabric may be formed of 30 to 70% by weight of a polyester fiber or an elastic conjugate fiber and 30 to 70% by weight of a low-melting-point polyester fiber. do.

The present invention also provides a vertical elastic nonwoven fabric having a low melting point contact characterized in that the elastic composite fiber is composed of fibers having any one of a side-by-side type, a sheath-core type and an eccentric sheath- .

The present invention also provides a vertical elastic nonwoven fabric having a low melting point contact characterized by comprising a fiber containing a flame retardant or an antimicrobial agent in any one or two or more of the polyester fiber, the elastic composite fiber and the low melting point polyester fiber do.

The present invention also provides a vertical elastic nonwoven fabric having a low melting point contact, characterized in that a cross-perpendicular structure is formed in such a manner that a cross-elastic nonwoven fabric is further attached to one side or both sides of the above-described side-by-side elastic nonwoven fabric.

The present invention also provides a method for producing a vertical elastic nonwoven fabric having a low melting point contact, comprising the steps of: preparing a polyester-based elastic nonwoven fabric from a low-melting-point elastic composite fiber comprising a polyester- A step of fabricating the elastic nonwoven fabric; A step of producing a low melting point elastic nonwoven fabric for producing a low melting point elastic nonwoven fabric from polyester fibers or elastic conjugated fibers and low melting point polyester fibers; Producing a cross-elastic nonwoven fabric by laminating the low-melting-point elastic nonwoven fabric on the upper and lower surfaces of the polyester elastic nonwoven fabric, thereby producing a cross-elastic nonwoven fabric; A step of producing a vertical elastic nonwoven fabric by vertically folding the cross-elastic nonwoven fabric to produce a vertical elastic nonwoven fabric; A heat treatment step of subjecting the vertical elastic nonwoven fabric to a heat treatment process so that the low melting point elastic nonwoven fabric adjacent to each other overlaps to form a low melting point contact; The present invention also provides a method of manufacturing a vertical elastic nonwoven fabric having a low melting point contact.

The polyester-based elastic nonwoven fabric is produced by mixing 50 to 85% by weight of a polyester fiber having an intrinsic viscosity of 0.50 to 0.69 dl / g and 50 to 85% by weight of a low melting polyester having an intrinsic viscosity of 1.0 to 1.7 dl / Characterized in that a polyester-based elastic nonwoven fabric is produced by mixing 15 to 50% by weight of a low-melting-point elastic composite fiber composed of a polyester-based polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g and a low- A method for producing a nonwoven fabric is provided.

The low-melting-point elastic nonwoven fabric is produced by mixing 30 to 70% by weight of polyethylene terephthalate or an elastic conjugate fiber with 30 to 70% by weight of low-melting-point polyester fiber, A method for producing a vertical elastic nonwoven fabric having a low melting point contact is provided.

Also, the heat treatment step may include heat treating the vertical elastic nonwoven fabric at 170 to 210 ° C for 3 to 20 minutes, thereby providing a method for manufacturing a vertical elastic nonwoven fabric having a low melting point contact.

Further, there is provided a method of manufacturing a vertical elastic nonwoven fabric having a low melting point contact, wherein the cross-elastic elastic nonwoven fabric is produced by further attaching a cross-elastic nonwoven fabric to one or both sides of the vertical elastic nonwoven fabric after the step of producing the vertical elastic nonwoven fabric do.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

In the present invention, 'cross elastic nonwoven fabric' means a nonwoven fabric in which constituent fibers are arranged in a horizontal direction, and 'vertical elastic nonwoven fabric' means a nonwoven fabric in which a part of constituent fibers are arranged in a vertical direction.

FIG. 1 is a cross-sectional view showing one embodiment of a vertical elastic nonwoven fabric having a low melting point contact according to the present invention, FIG. 2 is a cross-sectional elastic nonwoven fabric according to another embodiment of a vertical elastic nonwoven fabric having a low melting point contact according to the present invention, 3 is a cross-sectional view showing the detailed structure of a cross-elastic nonwoven fabric for forming a vertical elastic nonwoven fabric having a low melting point contact of the present invention. FIG. 4 is a cross-sectional view showing a state where a cross-linked nonwoven fabric is folded to form a low-melting point contact to form a vertical elastic nonwoven fabric of the present invention, and FIG. 5 is a view showing a method of manufacturing a vertical elastic nonwoven fabric having a low- Fig.

The present invention relates to an elastic nonwoven fabric having a low melting point contact formed in a vertical structure. As shown in Fig. 1, a cross-structure polyester elastic nonwoven fabric having constituent fibers arranged in a horizontal direction is folded at a predetermined width, Melting contact point 110 is formed at a portion where the elastic nonwoven fabric surfaces are adjacent to each other due to folding due to the vertical structure in the vertical elastic nonwoven fabric 100 formed by a vertical structure so that the low melting point contact point 110 is formed The present invention relates to a vertical elastic nonwoven fabric.

The cross-linked polyester elastic nonwoven fabric having the constituent fibers arranged in the horizontal direction of the present invention may be composed of 50 to 85% by weight of polyester fibers and 15 to 50% by weight of low melting point elastic fibers.

The polyester fibers may be polyester fibers having an intrinsic viscosity of 0.50 to 0.69 dl / g and a fineness of 2 to 20 denier, and polytrimethylene terephthalate, polybutylene terephthalate and polyethylene terephthalate may be selectively used have.

The low-melting-point elastic composite fiber has a low-melting-point polyester-based elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g with a melting point of 120 to 180 ° C in order to form an elastic force due to a conjugate fiber formed of a low-melting polyester- And a polyester-based polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g.

The low melting point polyester-based elastomer having a melting point of 120 to 180 DEG C is obtained by reacting terephthalic acid (TPA), isophthalic acid (TPA) having a -COOH or -COOR (R is an alkyl group or an arylalkyl group of C1 to C10) Poly (tetramethylene ether) glycol (PTMG), 1,4-butanediol, 1,4-butanediol, 1,4-butanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, -Butanediol (1,4-BD), and ethylene glycol (EG), and has a heat-sealable property by heating and pressing, and at the same time has high elasticity And has a recovery rate.

The polyester-based polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g may be polyethylene terephthalate which is generally manufactured and sold.

The low melting point elastic composite fiber may be composed of fibers having any one of a side-by-side type, a sheath-core type, and an eccentric sheath-core type.

When the low-melting-point elastic composite fiber is a sheath-core type, it is preferable that the core portion is a polyester-based polymer and the sheath portion is a low-melting-point polyester-based elastomer.

In order to impart flame retardancy and antibacterial properties to the polyester-based elastic nonwoven fabric, the polyester-based fiber or the low-melting-point elastic conjugated fiber or the fiber containing the flame retardant or the antibacterial agent in the polyester- To use It will be possible.

When the low-melting-point elastic composite fiber is produced into a cis-core type, it is preferable to include a functional material such as a flame retardant and an antibacterial agent in the core portion.

The phosphorus flame retardant that can be used in the present invention is phosphorus-based flame retardant. Phosphorus-based flame retardant includes phosphoric acid ester-based aromatic phosphate ester oligomer and the like. It is preferable to use a phosphate ester flame retardant.

Examples of the antimicrobial agent include nano silver antimicrobial agents, calcium phosphate antimicrobial agents, zirconium phosphate antibacterial agents, silica gel antibacterial agents, and zeolite antibacterial agents. The antimicrobial agent is preferably added in an amount of 0.5 to 0.7% by weight based on the total weight of the elastic nonwoven fabric. If the amount of the antimicrobial agent is less than 0.5% by weight, the antimicrobial properties may be insufficient. On the contrary, if the antimicrobial agent content exceeds 20% by weight, it may be difficult to control the antimicrobial agent content.

When the cross-structured polyester elastic nonwoven fabric is used to form a vertical elastic nonwoven fabric as shown in Fig. 1, a low-melting elastic nonwoven fabric is contained in the overlapping portion where the cross-structured polyester elastic nonwoven fabric is folded Thereby forming a low melting point contact 110.

The low melting point contact point 110 is such that the elastic force existing in the cross-linked polyester-based elastic nonwoven fabric causes the neighboring nonwoven fabric to spread without overlapping with the folded portion of the vertical elastic nonwoven fabric by attaching the neighboring nonwoven fabric with the adhesive force of the low- So that the shape of the vertical elastic nonwoven fabric can be stably maintained.

The vertical elastic nonwoven fabric of the present invention plays a role of maintaining the shape stability by bonding between fibers even at a low temperature of 120 to 210 DEG C due to a low melting point contact point and it is possible to perform heat treatment at a lower temperature than conventional polyester of about 250 to 280 DEG C And it is possible to perform a low temperature heat treatment, thereby reducing the heat treatment cost for subsequent fusion bonding.

The length h of the low melting point contact formed by overlapping the low melting elastic nonwoven fabric at the folded portion of the vertical elastic nonwoven fabric may be preferably 5 to 200 mm. When the length h of the low melting point contact is 5 mm or less, the elastic structure of the elastic nonwoven fabric tends to stretch the vertical structure, and therefore the shape may be unstable. Further, when the length h of the low melting point contact is 200 mm or more, the vertical elastic nonwoven fabric has a large thickness, so that the shape of the fibers arranged in the vertical direction can be easily collapsed and the manufacturing process for forming the vertical structure becomes difficult, Can be increased.

The low melting point elastic nonwoven fabric forming the low melting point contact may be formed of 30 to 70% by weight of polyester fiber or elastic conjugate fiber and 30 to 70% by weight of low melting point polyester fiber.

When the low-melting-point elastic nonwoven fabric is formed of the elastic composite fibers and the low-melting-point polyester fibers, compared with the low-melting elastic nonwoven fabric formed of the polyester-based fibers and the low-melting-point polyester fibers, The workability in the process is excellent.

The elastic conjugate fiber may be any elastic fiber made of conjugate fiber, but it is preferably formed of a polyester-based elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g and a polyester-type polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g something to do.

The elastic composite fibers of the low melting point elastic nonwoven fabric may be composed of fibers having any one of a side-by-side type, a sheath-core type, and an eccentric sheath-core type.

The low-melting-point polyester fiber preferably has a melting point of 100 to 180 DEG C, a fineness of 2 to 6 denier, and a fiber length of 22 to 64 mm, and is preferably a low melting polyester type fiber All the low-melting-point polyester fibers satisfying the above-mentioned conditions can be used.

In order to impart flame retardancy and antibacterial properties to the low melting point elastic nonwoven fabric, a fiber containing a flame retardant or an antimicrobial agent in any one or two or more of the polyester fiber, the elastic composite fiber or the low melting point polyester fiber When the elastic composite fiber is manufactured into a cis-core type, functional materials such as a flame retardant and an antibacterial agent are preferably included in the core portion.

The elastic composite fiber or low melting point polyester fiber, elastic composite fiber and low melting point polyester fiber of the low melting point elastic nonwoven fabric may include the flame retardant and the antibacterial agent as described above.

Although the vertical elastic nonwoven fabric of the present invention can withstand the pressure applied in the vertical direction due to the vertical arrangement of the constituent fibers, the elasticity at the side can be relatively weak in the case of deformation at the side or long-term compression. 2, a cross-elastic nonwoven fabric is further attached to one side or both sides of the vertical elastic nonwoven fabric, and a low-melting elastic nonwoven fabric is contained in a portion where the cross-elastic nonwoven fabric and the cross-elastic nonwoven fabric overlap each other, Can form a cross-vertical structure.

The vertical elastic nonwoven fabric formed from a single nonwoven fabric composed of merely low melting point elastic composite fibers and polyester fibers has a low adhesive force and the shape of the folded structure is unstable due to the property of the elastic nonwoven fabric. When the low-melting-point elastic nonwoven fabric of the present invention is formed by using the composite nonwoven fabric laminated on the upper and lower surfaces of the polyester elastic nonwoven fabric, the adhesive force is improved by the low-melting point contact, It is stable. In addition, when the cross-directional elastic nonwoven fabric is formed, since the number of the low melting point contacts at the portion overlapping with the vertical elastic nonwoven fabric increases, the adhesive force can be higher than that of the above-mentioned vertical elastic nonwoven fabric, The recovery rate is increased.

As shown in FIG. 3, the vertical elastic nonwoven fabric having the low melting point contact according to the present invention can be manufactured from a cross-elastic nonwoven fabric having a low melting point elastic nonwoven fabric attached to the upper and lower surfaces of the polyester elastic nonwoven fabric. In order to produce the vertical elastic nonwoven fabric having the low melting point contact point, it is difficult to produce low-melting-point fibers in the folded portion of the vertical structure because of difficulty in manufacturing, which may result in a long manufacturing time and low productivity. Accordingly, in the present invention, a cross-elastic nonwoven fabric having low melting point elastic nonwoven fabric is folded at a predetermined width to form a vertical elastic nonwoven fabric, and a portion overlapping the folded portion is formed of a low melting point elastic nonwoven fabric, Can be produced.

The step of producing the vertical elastic nonwoven fabric having the low melting point contact point can be produced by a polyester elastic nonwoven fabric manufacturing step, a low melting point elastic nonwoven fabric manufacturing step, a cross elastic nonwoven fabric manufacturing step, a vertical elastic nonwoven fabric manufacturing step, and a heat treatment step.

The polyester-based elastic nonwoven fabric-producing step is a step of producing a polyester-based elastic nonwoven fabric with a low-melting-point elastic composite fiber comprising a polyester-based fiber and a low-melting-point polyester-based elastomer.

The polyester-based elastic nonwoven fabric can be produced by a general method for producing a nonwoven fabric, that is, a nonwoven fabric is produced by a carding method, a wet laid method, or an air laid method, After the nonwoven fabric is bonded by needle punching or spun racing or hydro-entangling method, the bonded nonwoven fabric is heat-bonded to the thermally bonded polyester-based nonwoven fabric through a process of passing through a thermal tenderer or an embossing roll at 180 to 210 ° C An elastic nonwoven fabric can be produced.

The step of producing the low melting point elastic nonwoven fabric is a step of producing a low melting point elastic nonwoven fabric by using a polyester fiber or an elastic conjugate fiber and a low melting point polyester fiber and the low melting point elastic nonwoven fabric is a polyester fiber or an elastic composite fiber 30 To 70% by weight of the low melting point polyester fiber and 30 to 70% by weight of the low melting point polyester fiber.

The low melting point elastic nonwoven fabric can be produced by the same method as the method for producing the polyester elastic nonwoven fabric.

The step of producing the cross-elastic nonwoven fabric is a step of laminating the low melting point elastic nonwoven fabric on the upper and lower surfaces of the polyester elastic nonwoven fabric as shown in Fig. 3 to produce a cross-elastic nonwoven fabric. Melting elastic nonwoven fabric 400 manufactured in the step of manufacturing the low-melting-point elastic nonwoven fabric is attached to the upper and lower surfaces of the polyester-based elastic nonwoven fabric 500.

The step of producing the vertical elastic nonwoven fabric is a step of folding the cross-elastic nonwoven fabric to a predetermined width to produce a vertical elastic nonwoven fabric.

In the step of producing the vertical elastic nonwoven fabric, the cross-elastic nonwoven fabric is folded at a constant width as shown in FIG. 4, and the low melting point elastic nonwoven fabric is contained in the overlapping portion by folding, so that the low melting point contact point 110 can be formed. When the length h of the low melting point contact is 5 mm or less, the elastic structure of the elastic nonwoven fabric tends to expand due to the elasticity thereof, and thus the shape may be unstable. When the length h of the low melting point contact is 200 mm or more It is preferable that the length h of the low melting point contact is 5 to 200 mm because the thickness of the vertical elastic nonwoven fabric is thick and the shape of the fibers arranged in the vertical direction can easily collapse.

The heat treatment step is a step of applying a heat treatment process to the nonwoven fabric so that the low melting point elastic nonwoven fabric which is adjacent to each other to form a low melting point contact point.

In the heat treatment step, the nonwoven fabric after the cross-elastic nonwoven fabric manufacturing step and the vertical elastic nonwoven fabric manufacturing step may be heat-treated at 170 to 210 ° C for 3 to 20 minutes.

A high adhesive force is produced at the low melting point contacts of the vertical and cross-elastic elastic nonwoven fabric subjected to the heat treatment step, and the shape maintenance of the vertical and cross-vertical structures becomes stable.

2, a cross-elastic nonwoven fabric is further attached to one side or both sides of the vertical elastic nonwoven fabric, and a low-melting-point elastic nonwoven fabric is applied to a portion where the crosswise elastic nonwoven fabric and the cross- A cross-vertical structure having a low melting point contact 110 can be manufactured.

As described above, the elastic nonwoven fabric of the present invention has an effect of increasing the adhesive force with the neighboring nonwoven fabric at the time of forming the nonwoven fabric, stabilizing the shape of the nonwoven fabric, improving the peel strength, and improving the repetitive compression recovery rate.

Further, the elasticity of the nonwoven fabric positioned on the upper and lower layers is improved, thereby improving the workability and form stability of the entire cushioning material.

In addition, also in the structure in which the cross-elastic nonwoven fabric and the vertical elastic nonwoven fabric are laminated, the adhesion between the cross-elastic nonwoven fabric and the above-described vertical elastic nonwoven fabric is improved and the shape stability of the entire cushioning material is improved.

1 is a cross-sectional view showing one embodiment of a vertical elastic nonwoven fabric having a low melting point contact according to the present invention.
2 is a cross-sectional view showing another embodiment of a vertical elastic nonwoven fabric having a low melting point contact according to the present invention.
3 is a cross-sectional view showing the structure of a cross-elastic nonwoven fabric for forming a vertical elastic nonwoven fabric having a low melting point contact of the present invention.
4 is a cross-sectional view showing a state in which the cross-elastic nonwoven fabric is folded to form the vertical elastic nonwoven fabric of the present invention.
5 is a process diagram showing a method for producing a vertical elastic nonwoven fabric having a low melting point contact according to the present invention.

Hereinafter, a vertical elastic nonwoven fabric having a low melting point contact point of the present invention will be described in detail with reference to examples. The following examples illustrate the present invention, but the scope of the present invention is not limited to the following examples.

Example  One

70% by weight of inelastic crimped hollow conjugated polyethylene terephthalate (PET) fibers having a fineness of 7.0 denier, a strength of 3.3 g / d, an elongation of 30%, a hollow ratio of 18% and a fiber length of 51 mm, a fineness of 5.5 denier, Melting point polyester-based elastomer (Elastomer) having an intrinsic viscosity of 1.5 with a fiber length of 64 mm and a melting point of 150 ° C and polyethylene terephthalate with an intrinsic viscosity of 0.65 with a shrinkage percentage of 5%, an elongation of 70%, a low melting point elasticity of an eccentric side- 30% by weight of composite fibers were mixed and passed through a roller card process to produce a polyester elastic nonwoven fabric having a thickness of 20 mm and a density of 25 kg / m 3.

A low melting point elastic nonwoven fabric prepared by mixing 50 wt% of polyethylene terephthalate (PET) fiber and 50 wt% of low melting point polyester fiber at 5 mm and 10 kg / m 3 was laminated on the upper and lower sides of the polyester elastic non- Thereby producing a cross-elastic nonwoven fabric having a thickness of 30 mm.

A vertical elastic nonwoven fabric was uniformly folded in a width of 50 mm so that most of the constituent fibers of the cross-elastic nonwoven fabric could be arranged in the thickness direction of the nonwoven fabric. The resulting product was passed through a heat treatment process at 190 캜 for 15 minutes, Nonwoven fabric was produced.

Example  2

50% by weight of an elastic fiber composed of a polyester-based elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g and a polyester-based polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g, Were melt-laminated on the upper and lower sides of the polyester-based elastic nonwoven fabric of Example 1 to prepare a cross-elastic nonwoven fabric. In the same manner as in Example 1 except that the above-mentioned vertical elastic nonwoven fabric of the present invention .

Example  3

The cross-elastic nonwoven fabric produced in the same manner as in Example 2 was folded uniformly at a width of 30 mm to produce a vertical elastic nonwoven fabric. A fineness of 15.0 denier, a strength of 4.0 g / d, an elongation of 77%, a fiber length of 64 mm 70% by weight of an inelastic crimped polyethylene terephthalate fiber, and 30% by weight of a polyester-based elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g and a polyester-based polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g were mixed The crosslinked elastic nonwoven fabric of the present invention was prepared in the same manner as in Example 2, except that a cross-elastic nonwoven fabric having a density of 20 kg / m 3 and a thickness of 20 mm was further laminated.

Comparative Example 1

70% by weight of inelastic crimped hollow conjugated polyethylene terephthalate (PET) fibers having a fineness of 7.0 denier, a strength of 3.3 g / d, an elongation of 30%, a hollow ratio of 18% and a fiber length of 51 mm, a fineness of 5.5 denier, Melting point polyester-based elastomer (Elastomer) having an intrinsic viscosity of 1.5 with a fiber length of 64 mm and a melting point of 150 ° C and polyethylene terephthalate with an intrinsic viscosity of 0.65 with a shrinkage percentage of 5%, an elongation of 70%, a low melting point elasticity of an eccentric side- 30% by weight of composite fibers were mixed and passed through a roller card process to produce a cross-elastic nonwoven fabric having a thickness of 30 mm and a density of 45 kg / m 3.

A vertical elastic nonwoven fabric was uniformly folded in a width of 50 mm so that most of the constituent fibers of the cross-elastic nonwoven fabric could be arranged in the thickness direction of the nonwoven fabric, and passed through a heat treatment process at 190 캜 for 15 minutes to form a vertical Thereby producing an elastic nonwoven fabric.

Comparative Example 2

The cross-elastic nonwoven fabric produced in the same manner as in Comparative Example 1 was folded uniformly at a width of 30 mm to produce a backing elastic nonwoven fabric. The backing of the backing elastic nonwoven fabric had a fineness of 15.0 denier, a strength of 4.0 g / d, an elongation of 77% 70% by weight of an inelastic crimped polyethylene terephthalate fiber and 30% by weight of an elastomeric composite fiber composed of a polyester-based elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g and a polyester-based polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g A cross-elastic elastic nonwoven fabric was prepared in the same manner as in Comparative Example 1, except that a cross-elastic nonwoven fabric having a density of 20 kg / m 3 and a thickness of 20 mm was laminated.

The rebound resilience, permanent compression strain, recurring compression durability and shape stability of the vertical elastic nonwoven fabric of Examples 1 to 3 and Comparative Examples 1 and 2 prepared above were measured and shown in Table 1.

* How to measure

1) Ball Rebound

: Measure the height of rebounding by dropping iron beads on a foam pad at a constant height (ASTM D 3574, unit:%)

2) Permanent Compression Set (Compression Set)

: A foam pad is compressed at a constant rate and stored at a constant temperature and humidity for a certain period of time. The deformed height is measured (ASTM D 3574, unit:%)

3) Recurring Compression Dynamic Fatigue

: The test specimen was sandwiched between parallel flat plates and repeatedly compressed 80,000 times at a rate of 60 times / min at room temperature up to 50% of the thickness of the specimen. The deformed height was measured (KS M 6672, unit:%)

4) Shape stability of cushioning material

: A comparative evaluation of the degree of deformation of the cushioning material due to the load of the body while five adult males were lying on the sample for 30 minutes (○: good, △: normal, ×: poor)

5) Shape stability after washing of cushion material

: The sample was placed in a general laundry tester and evaluated for degree of deformation after 1 cycle washing (○: good, △: normal, ×: poor)

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Initial rebound resilience (%) 61.8 62.2 63.6 61.5 62.3 Permanent Compression Strain (%) 33.0 31.8 30.5 35.6 31.9 Recurrence Compression Permanent Rowing Rate (%) 10 9 7 12 8 Morphological stability △ ○ ○ × △ Form stability after washing △ △ ○ × ×

As shown in Table 1, Examples 1, 2 and 3, which are nonwoven fabrics having a low melting point contact formed with a vertical structure according to the present invention, were superior in morphological stability as compared with Comparative Examples 1 and 2. Further, 2 and 3 were superior to Comparative Examples 1 and 2 in shape stability after washing.

In addition, it can be seen that Example 3 is superior to Examples 1 and 2 in the experimental evaluation, and that the cross-elastic elastic nonwoven fabric is superior to the vertical elastic nonwoven fabric.

100 Vertical Elastic Nonwoven Fabric 200 Cross Elastic Nonwoven Fabric
300 Cross-Vertical Elastic Nonwoven
400 Low melting point elastic composite fiber 500 Polyester elastic nonwoven fabric
110 Low melting point contact point

Claims (14)

A polyester elastic nonwoven fabric having a cross structure in which constituent fibers are arranged in a horizontal direction is folded at a predetermined width and the constituent fibers are arranged in a vertical direction to form a vertical elastic nonwoven fabric formed in a vertical structure,
Wherein the low melting point contact point is formed by incorporating a low melting point elastic nonwoven fabric at a portion where the nonwoven fabric surfaces are adjacent to each other due to the folding by the vertical structure. The method according to claim 1,
Wherein the length (h) of the portion where the nonwoven fabric surfaces are adjacent to each other in the vertical structure is 5 to 200 mm. The method according to claim 1,
The polyester-based elastic nonwoven fabric comprises 50 to 85% by weight of a polyester fiber having an intrinsic viscosity of 0.50 to 0.69 dl / g, a low-melting polyester elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g and an intrinsic viscosity of 0.50 And 15 to 50% by weight of a low-melting-point elastic conjugate fiber comprising a polyester-based polymer having a melting point of from 0.80 to 0.80 dl / g. The method of claim 3,
Wherein the low melting point elastic conjugated fiber is composed of fibers having any one of a side-by-side type, a sheath-core type and an eccentric sheath-core type. The method of claim 3,
A vertical elastic nonwoven fabric having a low melting point contact characterized by comprising a polyester fiber or a low melting point elastic conjugated fiber or a polyester fiber and a low melting point elastic conjugated fiber containing a flame retardant or an antibacterial agent. The method according to claim 1,
Wherein the low melting point elastic nonwoven fabric is formed of 30 to 70% by weight of polyester fibers or elastic composite fibers and 30 to 70% by weight of low melting point polyester fibers. The method according to claim 6,
Wherein the elastic composite fiber is composed of fibers having any one of a side-by-side type, a sheath-core type, and an eccentric sheath-core type. The method according to claim 6,
And a fiber containing a flame retardant or an antimicrobial agent in any one or two or more of the polyester fiber, the elastic conjugate fiber and the low melting point polyester fiber. The method according to claim 1,
Characterized in that a cross-vertical structure is formed in such a manner that a cross-elastic nonwoven fabric is further adhered to one side or both sides of the above-described vertical elastic nonwoven fabric. A method for producing a vertical elastic nonwoven fabric having a low melting point contact,
A polyester-based elastic nonwoven fabric production step of producing a polyester-based elastic nonwoven fabric from a low-melting-point elastic composite fiber comprising a polyester-based fiber and a low-melting-point polyester-based elastomer;
A step of producing a low melting point elastic nonwoven fabric for producing a low melting point elastic nonwoven fabric from polyester fibers or elastic conjugated fibers and low melting point polyester fibers;
Producing a cross-elastic nonwoven fabric by laminating the low-melting-point elastic nonwoven fabric on the upper and lower surfaces of the polyester elastic nonwoven fabric, thereby producing a cross-elastic nonwoven fabric;
A step of producing a vertical elastic nonwoven fabric by vertically folding the cross-elastic nonwoven fabric to produce a vertical elastic nonwoven fabric;
A heat treatment step of subjecting the vertical elastic nonwoven fabric to a heat treatment process so that the low melting point elastic nonwoven fabric adjacent to each other overlaps to form a low melting point contact;
And the low-melting point contact point. The method of manufacturing a vertical elastic nonwoven fabric having a low-melting point contact. 11. The method of claim 10,
The polyester-based elastic nonwoven fabric comprises 50 to 85% by weight of a polyester fiber having an intrinsic viscosity of 0.50 to 0.69 dl / g, a low-melting polyester elastomer having an intrinsic viscosity of 1.0 to 1.7 dl / g and an intrinsic viscosity of 0.50 And 15 to 50% by weight of a low-melting-point elastic conjugate fiber comprising a polyester-based polymer having a melting point of about 0.80 dl / g. 11. The method of claim 10,
Wherein the low melting point elastic nonwoven fabric is made of 30 to 70% by weight of a polyester fiber or an elastic conjugate fiber and 30 to 70% by weight of a low melting point polyester fiber. 11. The method of claim 10,
Wherein the heat treatment step comprises heat-treating the vertical elastic nonwoven fabric at 170 to 210 DEG C for 3 to 20 minutes. ≪ RTI ID = 0.0 > 18. < / RTI > 11. The method of claim 10,
Wherein the cross-elastic elastic nonwoven fabric is produced by further attaching a cross-elastic nonwoven fabric to one or both sides of the vertical elastic nonwoven fabric after the step of producing the vertical elastic nonwoven fabric.

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