KR101543066B1 - The elastic nonwoven fabric having a low melting contact face formed by structure and manufacturing method thereof - Google Patents

Abstract

A polyester-based elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are arranged in a horizontal direction is folded with a predetermined width, and the adjacent overlapping portions of the predetermined width are arranged in the vertical direction with reference to the horizontally arranged elastic nonwoven fabric, Wherein the polyester-based elastic nonwoven fabric comprises 50 to 85% by weight of polyester fibers having an intrinsic viscosity of 0.50 to 0.69 dl / g, and a polyester fiber having a melting point of 120 to 180 캜, Melting polyester elastomer having a low melt viscosity of 1.7 dl / g and a polyester-based high polymer having an intrinsic viscosity of 0.50 to 0.80 dl / g, wherein the polyester elastomer The nonwoven fabric is folded at a predetermined width to form a vertically aligned structure, whereby the polyester-based fiber of the elastic nonwoven fabric and the joint surface of the low-melting- Vertically arranged elastic nonwoven fabric having a low melting point contact face, characterized in that the generated and to a production method thereof.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertically aligned elastic nonwoven fabric having a low melting point contact surface and a method of manufacturing the same. 2. Description of the Related Art [0002]

The present invention relates to an elastic nonwoven fabric having a low melting point contact surface formed in a vertically arranged structure, and more particularly to a nonwoven fabric having elasticity with a low melting point contact surface improved in shape stability, peel strength and repeated compression recovery rate, Nonwoven fabric.

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 problem, a method of producing a vertically aligned 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. The vertically aligned elastic nonwoven fabric is a method of fabricating a horizontally arranged elastic nonwoven fabric in which constituent fibers are arranged parallel to the paper surface, then folding the nonwoven fabric to a predetermined width and fixing the shape through a heat treatment process. However, in the case of a conventional nonwoven fabric having a vertical array structure, it has excellent elastic recovery force and initial elasticity with respect to the pressure applied in the vertical direction due to the vertical arrangement of the constituent fibers. However, . In addition, the shape of the folded portion at a certain width is not stable due to the elasticity of the nonwoven fabric, and it is difficult to maintain the vertically aligned structure, so that a high adhesive force at the folded portion is required.

In order to solve the above problems, it is an object of the present invention to provide a vertically-arranged elastic nonwoven fabric having improved structure stability and improved shape stability by increasing the adhesive force of the vertically-arranged elastic nonwoven fabric to the neighboring nonwoven fabric .

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

In order to solve the above-mentioned problems, the present invention provides a polyester nonwoven fabric comprising a polyester-based elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are arranged in a horizontal direction and having a predetermined width, Wherein the overlapping portions are arranged in the vertical direction, and the constituent fibers of the overlapping portions form vertically arranged elastic nonwoven fabric, wherein the polyester elastic nonwoven fabric has 50 to 85% by weight of polyester fibers having an intrinsic viscosity of 0.50 to 0.69 dl / g And 15 to 50 wt% of a low-melting-point elastic composite fiber composed of a low-melting-point 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 And the polyester-based elastic nonwoven fabric having the horizontally arranged structure is folded at a predetermined width to form a vertically arranged structure, whereby the polyester-based elastic nonwoven fabric of the elastic non- There is provided a vertically arranged elastic nonwoven fabric having a low melting point contact surface characterized by having a fiber surface and a bonding surface of low melting point elastic composite fibers formed on a lower surface thereof.

Also, a vertically arranged elastic nonwoven fabric having a low melting point contact surface has a length (h) of a portion where the elastic nonwoven fabric surfaces are adjacent to each other in the vertically arranged structure of 5 to 200 mm.

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. Lt; / RTI >

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Further, the polyester-based fiber or the low-melting-point elastic composite fiber, or the polyester-based fiber and the low-melting-point elastic composite fiber include a fiber containing a flame retardant or an antibacterial agent, Lt; / RTI >

The low-melting-point elastic nonwoven fabric is 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. to provide.

The present invention also provides a vertically arranged elastic nonwoven fabric having a low melting point contact surface, 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- do.

A vertically-aligned elastic nonwoven fabric having a low-melting-point contact surface, which comprises a fiber containing a flame retardant or an antimicrobial agent in any one or two or more of the above-mentioned polyester fiber, elastic conjugate fiber and low- to provide.

The present invention also provides a vertically arranged elastic nonwoven fabric having a low melting point contact surface, wherein the horizontally arranged elastic nonwoven fabric is further attached to one side or both sides of the vertically arranged elastic nonwoven fabric.

The present invention also provides a process for producing a vertically aligned elastic nonwoven fabric having a low melting point contact surface, comprising the steps of: preparing a polyester-based elastic nonwoven fabric with a low melting point elastic composite fiber comprising a polyester fiber and a low melting point polyester- A polyester-based elastic nonwoven fabric having a horizontally arranged structure in which constituent fibers are arranged in a direction parallel to the longitudinal direction; A step of producing a low melting point elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are arranged in a horizontal direction to produce a polyester-based fiber or an elastic conjugated fiber and a low-melting-point elastic nonwoven fabric by a low-melting-point polyester fiber; A step of producing a horizontally arranged elastic nonwoven fabric by laminating the low melting point elastic nonwoven fabric on the upper and lower surfaces of the polyester elastic nonwoven fabric; A step of fabricating a vertically arranged elastic nonwoven fabric in which the horizontally arranged elastic nonwoven fabric is folded at a predetermined width to produce a vertically arranged elastic nonwoven fabric; A heat treatment step of applying a heat treatment process to the vertically arranged elastic nonwoven fabric to form a low melting point contact surface of the low melting point elastic nonwoven fabric adjacent to each other; Wherein the low melting point has a melting point of 120 to 180 ° C. The present invention provides a method for producing a vertically aligned elastic nonwoven fabric having a low melting point contact surface.

The polyester-based elastic nonwoven fabric may further comprise 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, an intrinsic viscosity of 0.50 to 0.80 dl / g and 15 to 50% by weight of a low melting point elastic composite fiber made of a polyester-based polymer.

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 vertically aligned elastic nonwoven fabric having a low melting point contact surface is provided.

The heat-treating step may include heat-treating the vertically-aligned elastic nonwoven fabric at 170 to 210 ° C for 3 to 20 minutes. The method may further include the step of heat-treating the vertically-aligned elastic nonwoven fabric.

In addition, after the step of preparing the vertically arranged elastic nonwoven fabric, the horizontally aligned elastic nonwoven fabric may be further attached to one or both sides of the vertically arranged elastic nonwoven fabric to produce a horizontally aligned-vertically arranged elastic nonwoven fabric. A method for producing an elastic nonwoven fabric is provided.

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, 'horizontally arranged elastic nonwoven fabric' refers to a nonwoven fabric in which constituent fibers are arranged in a horizontal direction, and 'vertically arranged elastic nonwoven fabric' refers to 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 vertically-arranged elastic nonwoven fabric having a low-melting-point contact according to the present invention, FIG. 2 is a perspective view of a vertical arrangement elastic nonwoven fabric having a low- FIG. 3 is a cross-sectional view showing the detailed structure of a horizontally arranged elastic nonwoven fabric for forming a vertically arranged elastic nonwoven fabric having a low melting point contact surface of the present invention. FIG. 4 is a cross-sectional view illustrating a state in which a horizontally arranged elastic nonwoven fabric is folded to form a low melting point contact surface to form the vertically aligned elastic nonwoven fabric of the present invention, and FIG. 5 is a cross- Fig.

The present invention relates to an elastic nonwoven fabric having a low melting point contact surface formed in a vertically arranged structure. As shown in FIG. 1, a polyester elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are arranged in a horizontal direction is folded at a predetermined width, In the vertically arranged elastic nonwoven fabric 100 formed in a vertically arranged structure by arranging the constituent fibers in the vertical direction with respect to the surface on which the horizontally arranged elastic nonwoven fabric 200 is positioned, And a low-melting-point contact surface 110 is formed at a portion where the elastic nonwoven fabric surfaces are adjacent to each other and thus a low-melting-point elastic nonwoven fabric is contained.

The polyester-based elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are 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 polyester-based elastic nonwoven fabric having the horizontal arrangement structure is used to form a vertically arranged elastic nonwoven fabric as shown in FIG. 1, a low-melting-point elastic nonwoven fabric is applied to the overlapping portion where the polyester- To form a low-melting-point contact surface 110.

The low-melting-point contact surface 110 is formed such that the elastic force existing in the polyester-based elastic nonwoven fabric having a horizontal alignment structure causes the neighboring nonwoven fabric to spread without overlapping with the folded portion of the vertically-aligned elastic nonwoven fabric, So that the shape of the vertically arranged elastic nonwoven fabric can be stably maintained.

The vertically aligned elastic nonwoven fabric of the present invention plays a role of maintaining the shape stability by bonding between fibers at a low temperature of 120 to 210 DEG C due to a low melting point contact surface. It is possible to have a similar physical property and to perform the low temperature heat treatment, thereby reducing the heat treatment cost for the subsequent fusion bonding.

The length h of the low melting point contact surface formed by overlapping the low melting point elastic nonwoven fabric at the folded portion of the vertically arranged elastic nonwoven fabric may preferably be 5 to 200 mm. When the length h of the low melting point contact surface is 5 mm or less, the elastic arrangement of the elastic nonwoven fabric tends to cause the vertically aligned structure to expand, and thus the shape may be unstable. When the length h of the low melting point contact surface is 200 mm or more, the thickness of the vertically arranged elastic nonwoven fabric is too thick, so that the shape of the fibers arranged in the vertical direction can be easily broken and the manufacturing process for forming a vertically aligned structure becomes difficult. The defective rate can be increased.

The low melting point elastic nonwoven fabric forming the low melting point contact surface may be formed of 30 to 70% by weight of polyester fiber or elastic conjugated 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 conjugate fiber and the low-melting-point polyester fiber, the elastic soft nonwoven fabric is soft and elastic compared to the low-melting elastic nonwoven fabric formed of the polyester-based fiber and the low- The workability in the process for achieving 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.

The vertically-arrayed 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, but the resilience at the side and at the time of long-term compression can be relatively weak. Therefore, as shown in FIG. 2, a horizontally arranged elastic nonwoven fabric is further attached to one side or both sides of the vertically arranged elastic nonwoven fabric, and a low-melting elastic nonwoven fabric is included in a portion where the vertically-arranged elastic nonwoven fabric and the horizontally- A horizontal alignment-vertical alignment structure having a melting point contact surface 110 can be formed.

The vertically arranged elastic nonwoven fabric formed from a single nonwoven fabric composed of merely low melting point elastic conjugate fiber and polyester fiber has poor adhesive strength 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 surface, Is stable. In addition, when forming the horizontally aligned-vertically-arranged elastic nonwoven fabric, since the low-melting-point contact surface at the portion overlapping the vertically-arranged elastic nonwoven fabric increases, the adhesive force can be higher than that of the vertically-arranged elastic nonwoven fabric, Strength and repetitive compression recovery rate are increased.

The vertically arranged elastic nonwoven fabric having the low melting point contact surface according to the present invention can be manufactured from the horizontally arranged elastic nonwoven fabric having the low melting point elastic nonwoven fabric attached to the upper and lower surfaces of the polyester elastic nonwoven fabric as shown in FIG. In order to produce a vertically aligned elastic nonwoven fabric having a low melting point contact surface, it is difficult to produce low-melting-point fibers at the folded portion of the vertically aligned structure because of difficulty in manufacturing, which may result in long manufacturing time and low productivity. Accordingly, in the present invention, a horizontally arranged elastic nonwoven fabric having a low melting point elastic nonwoven fabric is folded at a predetermined width to form a vertically arranged elastic nonwoven fabric, and a portion overlapping the folded portion is formed of a low melting point elastic nonwoven fabric, Thereby producing an array elastic nonwoven fabric.

The step of preparing the vertically aligned elastic nonwoven fabric having the low melting point contact surface may be manufactured by a step of producing a polyester elastic nonwoven fabric, a step of producing a low melting point elastic nonwoven fabric, a step of preparing a horizontally aligned elastic nonwoven fabric, a step of preparing a vertically aligned elastic nonwoven fabric, 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 fabricating the horizontally arranged elastic nonwoven fabric may include the steps of laminating the low melting point elastic nonwoven fabric on the upper and lower surfaces of the polyester elastic nonwoven fabric to produce a horizontally aligned elastic nonwoven fabric, Melt elastic nonwoven fabric 400 prepared in the step of producing the low-melting-point elastic nonwoven fabric is attached to the upper and lower surfaces of the produced polyester-based elastic nonwoven fabric 500.

In the step of fabricating the vertically arranged elastic nonwoven fabric, the vertically arranged elastic nonwoven fabric is manufactured by folding the horizontally arranged elastic nonwoven fabric with a predetermined width.

In the step of fabricating the vertically arranged elastic nonwoven fabric, the horizontally arranged elastic nonwoven fabric is folded at a predetermined width as shown in FIG. 4, and the low melting point elastic nonwoven fabric is included in the overlapping portion by folding, thereby forming the low melting point contact surface 110. When the length h of the low melting point contact surface is 5 mm or less, the elastic arrangement of the elastic nonwoven fabric tends to cause the vertically arranged structure to expand, and thus the shape may be unstable. When the length h of the low melting point contact surface is 200 mm , It is preferable that the length h of the low melting point contact surface is 5 to 200 mm since the thickness of the vertically arranged elastic nonwoven fabric is thick and the shape of the fibers arranged in the vertical direction can be easily collapsed.

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 surface.

In the heat treatment step, it is preferable that the heat treatment is performed at 170 to 210 ° C. for 3 to 20 minutes to the nonwoven fabric after the step of preparing the horizontally arranged elastic nonwoven fabric and the step of producing the vertically aligned elastic nonwoven fabric.

The high adhesion is obtained on the low melting point contact surfaces of the vertically aligned and horizontally aligned and vertically aligned elastic nonwoven fabric subjected to the heat treatment step, so that the shape retention of the vertically aligned and horizontally aligned and vertically aligned structures becomes stable.

After the step of preparing the vertically arranged elastic nonwoven fabric, as shown in FIG. 2, the horizontally arranged elastic nonwoven fabric may be further attached to one or both surfaces of the vertically arranged elastic nonwoven fabric, A low-melting-point elastic nonwoven fabric is included so that a horizontally aligned-vertically aligned structure having a low-melting-point contact surface 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.

Also, in the structure in which the horizontally arranged elastic nonwoven fabric and the vertically arranged elastic nonwoven fabric are laminated, the adhesion between the horizontally arranged elastic nonwoven fabric and the vertically arranged elastic nonwoven fabric is improved, thereby improving the morphological stability of the entire cushioning material.

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

Hereinafter, a vertically-arranged elastic nonwoven fabric having a low-melting-point contact surface 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- To prepare a horizontally arranged elastic nonwoven fabric having a thickness of 30 mm.

The vertically arranged elastic nonwoven fabric was uniformly folded in a width of 50 mm so that most of the constituent fibers of the horizontally arranged elastic nonwoven fabric could be arranged in the thickness direction of the nonwoven fabric, and then passed through a heat treatment process at 190 캜 for 15 minutes, A vertically aligned elastic nonwoven fabric was prepared.

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 horizontally aligned elastic nonwoven fabric. In the same manner as in Example 1, Thereby producing an elastic nonwoven fabric.

Example  3

A vertically aligned elastic nonwoven fabric was produced by uniformly folding the horizontally arranged elastic nonwoven fabric produced in the same manner as in Example 2 at a width of 30 mm and a fineness of 15.0 denier, a strength of 4.0 g / d, an elongation of 77% 70 wt% of non-elastic crimped polyethylene terephthalate fibers having a length of 64 mm, 30 wt% 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 / And a 20 mm thick 20 mm thick layered elastic nonwoven fabric was further prepared by the same method as in Example 2 to prepare a horizontal array-vertically arranged elastic nonwoven fabric of the present invention.

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 prepare a horizontally arranged elastic nonwoven fabric having a thickness of 30 mm and a density of 45 kg / m 3.

The vertically arranged elastic nonwoven fabric was uniformly folded to have a width of 50 mm so that most of the constituent fibers of the horizontally arranged elastic nonwoven fabric were arranged in the thickness direction of the nonwoven fabric, and then passed through a heat treatment process at 190 캜 for 15 minutes, Were fabricated.

Comparative Example 2

The horizontally arranged elastic nonwoven fabric produced in the same manner as in Comparative Example 1 was uniformly folded in a width of 30 mm to prepare a vertically arranged elastic nonwoven fabric. A filament 15.0 denier, a strength 4.0 g / d, an elongation 77% 70 wt% of non-elastic crimped polyethylene terephthalate fiber having a length of 64 mm, 30 wt% 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 / And a 20 mm thick 20 mm thick layered elastic nonwoven fabric prepared by mixing were prepared in the same manner as in Comparative Example 1 to prepare a horizontally aligned and vertically arranged elastic nonwoven fabric.

The rebound resilience, permanent compression strain, recurring compression durability and shape stability of the vertically aligned elastic nonwoven fabrics 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, the non-woven fabrics Examples 1, 2 and 3 having a low melting point contact surface formed in a vertically aligned structure according to the present invention were superior in morphological stability to those of Comparative Examples 1 and 2, , 2 and 3 after washing were superior to those of Comparative Examples 1 and 2.

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

100: vertically arranged elastic nonwoven fabric 110: low melting point contact surface
200: Horizontal arrangement elastic nonwoven fabric 300: Horizontal-vertical arrangement elastic nonwoven fabric
400: Low melting point elastic composite fiber 500: Polyester elastic nonwoven fabric
510: Polyester fiber

Claims (14)

A polyester-based elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are arranged in a horizontal direction is folded with a predetermined width, and the adjacent overlapping portions of the predetermined width are arranged in the vertical direction with reference to the horizontally arranged elastic nonwoven fabric, The constituent fibers of the overlapping portions form a vertically arranged elastic nonwoven fabric,
The polyester-based elastic nonwoven fabric preferably comprises 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 a melting point of 120 to 180 캜 and 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 comprising a polyester-based polymer of 0.50 to 0.80 dl / g,
Characterized in that a vertically aligned structure is formed by folding the polyester-based elastic nonwoven fabric of the horizontally arranged structure at a constant width, whereby a joint surface of the polyester-based fiber of the elastic nonwoven fabric and a joint surface of the low- Vertically arranged elastic nonwoven fabric having a low melting point contact surface. The method according to claim 1,
Wherein the length (h) of the overlapping portions of the nonwoven fabrics adjacent to each other in the vertically aligned structure is 5 to 200 mm.
delete The method according to claim 1,
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 polyester fiber according to claim 1, wherein the one or two kinds of fibers selected from the polyester fiber and the low-
Flame retardant or an antimicrobial agent, wherein the elastic nonwoven fabric has a low melting point contact surface. 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 conjugated 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,
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 conjugate fiber and the low melting point polyester fiber. The method according to claim 1,
Wherein the horizontally arranged elastic nonwoven fabric is further attached to one side or both sides of the vertically arranged elastic nonwoven fabric to form a horizontally aligned-vertically aligned structure. A method for producing a vertically aligned elastic nonwoven fabric having a low melting point contact surface,
A step of producing a polyester-based elastic nonwoven fabric having a horizontally arranged structure in which constituent fibers are arranged in a horizontal direction to produce a polyester elastic nonwoven fabric with a low melting point elastic conjugate fiber comprising a polyester fiber and a low melting point polyester elastomer;
A step of producing a low melting point elastic nonwoven fabric having a horizontal arrangement structure in which constituent fibers are arranged in a horizontal direction to produce a polyester-based fiber or an elastic conjugated fiber and a low-melting-point elastic nonwoven fabric by a low-melting-point polyester fiber;
A step of producing a horizontally arranged elastic nonwoven fabric by laminating the low melting point elastic nonwoven fabric on the upper and lower surfaces of the polyester elastic nonwoven fabric;
A step of fabricating a vertically arranged elastic nonwoven fabric in which the horizontally arranged elastic nonwoven fabric is folded at a predetermined width to produce a vertically arranged elastic nonwoven fabric;
A heat treatment step of applying a heat treatment process to the vertically arranged elastic nonwoven fabric to form a low melting point contact surface of the low melting point elastic nonwoven fabric adjacent to each other;
Wherein the low-melting point has a melting point of 120 to 180 ° C.
11. The method of claim 10,
The polyester-based elastic nonwoven fabric preferably comprises 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 an intrinsic viscosity of 0.50 to 0.80 dl / g By weight of a polyester-based polymer and 15 to 50% by weight of a low-melting-point elastic composite fiber. 11. The method of claim 10,
Wherein the low melting point elastic nonwoven fabric is made of 30 to 70% by weight of polyester fibers or elastic conjugated fibers and 30 to 70% by weight of low melting point polyester fibers. . 11. The method of claim 10,
Wherein the heat-treating step comprises heat-treating the vertically arranged elastic nonwoven fabric at 170 to 210 ° C for 3 to 20 minutes. 11. The method of claim 10,
Wherein the horizontally aligned elastic nonwoven fabric is further attached to one side or both sides of the vertically arranged elastic nonwoven fabric after the step of preparing the vertically arranged elastic nonwoven fabric, Gt;

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