KR20190031931A - Leak-proof Adhesive Nonwoven Fabric And Automobile Interior Material Using The Same - Google Patents

Abstract

A leak-proof adhesive nonwoven fabric of the present invention comprises two layers in which an adhesive layer and a leak-proof layer are laminated or three layers in which an adhesive layer, a leak-proof layer, and an adhesive layer are laminated in order. The adhesive layer is a spun-bond nonwoven fabric using a polyester-based elastic resin formed by esterification between a diol and dicarbonic acid as a hard segment raw material and condensation polymerization of the product and polyol as a soft segment raw material. The leak-proof layer is a melt-brown nonwoven fabric using a polyolefin-based resin.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an anti-leakage adhesive nonwoven fabric,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leakage preventive adhesive nonwoven fabric and an automobile interior material using the same. More particularly, the present invention relates to a low melting point polyester spun bond elastic nonwoven fabric and an olefinic meltblown nonwoven fabric laminated structure.

The products of automotive interiors include trunks, ceilings, floors and door trim, and these products are required to be molded and lightweight, soundproof, soundproof and soundproof

Generally, a non-woven fabric, a sound-absorbing non-woven fabric and a sound-absorbing nonwoven fabric are produced and supplied to a molding company, and a film is sandwiched between the nonwoven fabric for surface and the sound- And molded into a mold.

Then, since each of the material companies producing the nonwoven fabric, the sound absorbing nonwoven fabric and the sound insulating nonwoven fabric produces and supplies them to the molding company, the loss due to the working process is serious, and the surface nonwoven fabric, the sound absorbing nonwoven fabric and the sound insulating non- In order to form the non-woven fabric and the sound-absorbing non-woven fabric of a predetermined thickness, two or four nonwoven fabrics of a certain thickness are punched by needle punching And two or four sheets are jointed again to form a single body by needle punching. As a result, the productivity is significantly lowered. Further, since the film is adhered between the surface nonwoven fabric and the sound insulating nonwoven fabric through the film, The function as a carpet for automobile interior materials is not provided It falls off greatly.

Patent Document 1: Korean Patent Laid-Open Publication No. 2006-0004337 (meltblown nonwoven fabric excellent in sound absorption property and heat insulation property) Patent Document 2: Korean Patent Laid-Open Publication No. 2012-0132735 (nonwoven fabric having air permeability, sound absorbing material using the nonwoven fabric and method for producing the same) Patent Document 3: Korean Patent Publication No. 1425852 (Integrated trunk sound insulation, air permeability, car trunk, carpet material, and manufacturing method thereof excellent in compression recovery ratio by nonwoven web double-ply or three-ply circle punching)

In order to solve the above-mentioned problems, it is an object of the present invention to provide an automotive interior material that can maximize lightening, soundproofing, sound absorption and sound insulation effects.

The present invention also provides a breathable nonwoven fabric for providing an automobile interior material as described above, which enables a PU foam layer to be integrally formed while molding various shapes of products in a mold, thereby easily producing a sound absorbing material having improved quality There is a desire to do so.

Another object of the present invention is to provide a leak-barrier bonding nonwoven fabric capable of preventing the leakage of the foamed layer between the PU foam layer and the base layer and having excellent adhesion to the base layer.

In order to solve the above-mentioned problems, the present invention provides a leak-preventive adhesive bonded nonwoven fabric comprising three layers in which two layers or an adhesive layer in which an adhesive layer and a leakage preventing layer are laminated, a leakage preventing layer and an adhesive layer are sequentially stacked, The adhesive layer is formed by a reaction between a diol (diol) and a dicarbonic acid as a hard segment raw material, and a sponge made of a polyester type elastic resin produced by polycondensation of a polyol as a soft segment raw material Wherein the leak-barrier layer (13) is a melt-blown nonwoven fabric using a polyolefin-based resin.

In the present invention, the diol component of the hard segment of the polyester-based elastic resin is selected from the group consisting of ethyleneglycol, diethylene glycol, 1,4-butanediol, Diol (1,3-propanediol) or a mixture of two or more thereof.

In the present invention, the dicarbonic acid component of the hard segment of the polyester elastomer resin is selected from the group consisting of teraphthalic acid, isophthalic acid, adipic acid and sebacic acid. And an anti-leakage adhesion-bonded nonwoven fabric characterized in that any one or two or more of them are mixedly used.

In another aspect, the present invention leakage characterized in that the pole rheology is polyethylene glycol (PEG) or poly tetra methylene glycol (PTMG), and 5 to 70% by weight of the polyester-based elastic resin compared to the soft segment of the polyester-based elastic resin Resistant adhesive nonwoven fabric.

In addition, the present invention provides a leakage preventing adhesive nonwoven fabric characterized in that the average diameter of fibers of the leakage preventing layer (13) is 0.1 to 20 탆.

The present invention also provides a leak-preventive adhesive nonwoven fabric characterized in that the spunbond elastic nonwoven fabric to the melt-blown nonwoven fabric has a component fiber to island ratio of 1: 0.1 to 1: 0.5.

Further, in the leak-barrier bonding nonwoven fabric of the two-layer structure, a polyurethane foam layer is bonded to one surface of the leakage preventing layer 13, a base layer is bonded to one surface of the adhesive layer, A vehicle interior material having a base layer on one side or a polyurethane foam layer on the other side is provided.

Further, the present invention provides an automobile interior material wherein the base layer is any one of a polyester nonwoven fabric, a polyurethane sponge, or a composite of the polyester nonwoven fabric and the polyurethane sponge.

In order to solve the above problems, the present invention has been made to solve the above-mentioned problems by using a non-woven fabric having a laminated structure of a low melting point polyester spun bond elastic nonwoven fabric and olefinic melt blown nonwoven fabric as an automobile interior material, It has an effect of preventing the leakage of liquid when bonding with the layer, and the sound absorption property of the automobile interior material is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a leak-barrier bonding nonwoven fabric composed of two layers according to one embodiment of the present invention. FIG.
2 is a cross-sectional view of a leakage preventing adhesive nonwoven fabric having three layers, which is one embodiment of the present invention.
3 is a cross-sectional view of an automobile interior material using a two-layer leak-preventive adhesive nonwoven fabric according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. 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.

As used herein, the terms " about, " " substantially, " " etc. ", when used to refer to a manufacturing or material tolerance inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

The present invention relates to a leakage preventing adhesive nonwoven fabric 10 and an automobile interior material using the leakage preventing adhesive bonded nonwoven fabric 10. The leakage preventing adhesive nonwoven fabric 10 has an adhesive layer 11 and a leakage preventing layer 13, Two laminated layers or three layers in which an adhesive layer 11, a leakage preventing layer 13, and an adhesive layer 11 are laminated in order.

FIG. 1 is a cross-sectional view of a leakage preventing adhesive nonwoven fabric 10 having two layers according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a leakage preventing adhesive nonwoven fabric 10 having three layers according to an embodiment of the present invention.

The adhesive layer 11 is formed by esterifying a diol and a dicarbonic acid as a raw material of a hard segment and forming a polyester based elastic resin which is produced by polycondensation of a polyol which is a soft segment raw material Is a spunbond elastic nonwoven fabric.

The method for producing the above polyester-based elastic resin composition will be described in detail.

The esterification reaction can be carried out in two ways. The esterification reaction can be carried out by two methods. Ester exchange method (DMT method) by reaction of dimethyl terephthalate (DMT) with ethylene glycol (EG) or direct esterification method by reaction of terephthalic acid and ethylene glycol Hydroxyethyl terephthalate (BHET) obtained by the method (TPA method)) and a condensation product of a low molecular weight of BHET are synthesized and the molecular chain is increased in length by melting and condensation polymerization while removing ethylene glycol (EG) have.

Firstly, in the ester exchange method (DMT method), the diol may be ethylene glycol, diethylene glycol, 1,4-butanediol, 1,3-propanediol, 3-propanediol), or a mixture of any one of the dianhydrides,

The dicarbonic acid may be a mixture of at least one of teraphthalic acid, isophthalic acid, adipic acid and sebacic acid,

The polyol may be composed of polyethylene glycol (PEG) or polytetramethylene glycol (PTMG) and is 5 to 70% by weight based on the polyester-based elastic resin.

Further, in the present invention, the polyester elastic resin having the above-described structure has a low hardness property because it has a hardness of 80 or less Shore D and a melting point of 100 to 220 캜.

The spun bond elastic nonwoven fabric of the adhesive layer 11 has a basis weight (g / m 2) of 20 to 40, preferably 25 to 30.

Next, the melt-blown nonwoven fabric of the leakage preventing layer 13 is made of polyolefin-based fibers, and the polyolefin-based fibers forming the nonwoven fabric may be made of various known polyolefins. For example, the polyolefin fibers may be selected from the group consisting of high density polyethylene, linear low density polyethylene, low density polyethylene, polypropylene (propylene homopolymer), ethylene-propylene copolymer based on propylene, ethylene propylene butene- Polybutene-1, polyhexene-1, polyhexene-1, poly 4-methylpentene-1, polymethylpentene, 1,2-polybutadiene, 1,4-polybutadiene, Modified product of maleic anhydride of propylene polymer, and the like, and may preferably be composed of polypropylene (PP).

The average diameter of the polyolefin fibers is in the range of 0.1 탆 to 20 탆. The basis weight (g / m 2) of the meltblown nonwoven fabric of the leakage preventing layer 13 is 20 to 40, preferably 25 to 30.

3 is a cross-sectional view of an automobile interior material using a leak-barrier bonding nonwoven fabric 10 composed of two layers, which is one embodiment of the present invention.

The one side of the leakage preventing layer 13 of the leakage preventing adhesive nonwoven fabric 10 is bonded to the polyurethane foam layer and the automobile interior material in which the base layer 20 is bonded to one side of the adhesive layer 11 is excellent in bonding strength between the respective layers, Which is excellent in sound absorption.

The polyurethane foam layer is excellent in stretchability and sound-absorbing property and thus is widely used in automobile interior materials. However, when it is combined with other base materials, the foaming liquid may be infiltrated during the foaming process. In particular, when foaming the nonwoven fabric, it may penetrate into the nonwoven fabric pores and cause a problem of sound absorption.

The polyurethane foam layer is foamed on one surface of the leakage preventing layer 13 of the leakage preventive adhesive nonwoven fabric 10. The leakage preventing layer (13) is a melt-blown nonwoven fabric which uses silver. The nonwoven fabric has an average diameter of 0.1 to 20 탆 and a basis weight of 20 to 40 (g / m 2) The liquid can not penetrate into the pores of the nonwoven fabric. Unlike conventional hot-melt adhesive film polyolefin-based resins, however, pores enough to contain air are secured. Therefore, the pore structure secured has an excellent effect by affecting the sound absorption property in the automobile interior material.

The base layer 20 may be composed of a general polyester (PET) nonwoven fabric or a polyurethane sponge. Or a structure in which a general polyester (PET) nonwoven fabric and a polyurethane sponge are laminated.

Therefore, the fineness of the constituent fibers of the adhesive layer 11 of the leakage preventive adhesive nonwoven fabric 10 bonded to the base layer 20 is in a range larger than that of the meltblown nonwoven fabric in order to secure the adhesive force and shape retention, With respect to the adhesive force with the layer 20 and the sound absorbing property of the automobile interior material, it is appropriate that the spunbond elastic nonwoven fabric to meltbond nonwoven fabric has a constituent fiber to island ratio of 1: 0.1 to 1: 0.5.

The features and other advantages of the present invention as described above will become more apparent from the following examples, which should not be construed as limiting or limiting the scope of protection of the present invention, .

Example  One

The adhesive layer 11 is made of a spunbonded nonwoven fabric with a basis weight (g / m < 2 >) of 30 by using a copolymer polyester elastic resin and the leakage preventing layer 13 is made of a meltbrown The nonwoven fabric is made to have a basis weight (g / m 2) of 30 and lapped to prepare two layers of the leakage preventive bonded nonwoven fabric (10).

The spun bond elastic nonwoven fabric to the melt-blown nonwoven fabric has a component fiber ratio of 1: 0.3.

A PU sponge was laminated on the adhesive layer of the leakage preventive adhesive nonwoven fabric 10 by a flame laminating method at a flame temperature of 200 ° C or higher and a process speed of 15 m / min as the base layer 20, A hole is made in the product to foam the foam layer 30 on the leakage preventing layer of the leakage preventing adhesive nonwoven fabric 10 at a foaming pressure of 100 bar for 130 seconds to obtain an average thickness of 5 to 20 mm and the foam layer is hardened to obtain an automobile interior material

Example  2

A leakage preventing adhesive nonwoven fabric 10 having the same structure as that of Example 1 except for the three layers of the adhesive layer 11 + the leakage preventing layer 13 + the adhesive layer 11 was prepared and a PU sponge as a base layer was laminated on one side by flame laminating On the other hand, PU is foamed on one side to obtain automobile interior material.

Comparative Example  1-4

In the comparative example, a polyurethane foam layer and a PET nonwoven fabric layer were laminated on one side and the other side by heating and pressing to obtain an automobile interior material by using a leakage preventive adhesive nonwoven fabric 10 composed of one layer of film or web structure. The remaining conditions are the same as those in Example 1.

◎ Tensile strength, Elongation at break

  - The tensile strength of film and web was analyzed by MS 200-41. The tensile speed was 200 mm / min.

◎ Breathability

  - The permeability of film and web was analyzed by ASTM D 737-04 measurement method.

   * CFM: Cubic Feet per Minute

◎ Leakage evaluation

  - The degree of leakage through the hardness evaluation (Shore D) was confirmed, and the hardness was measured according to the measurement method of ASTM D2240.

 * The lower the hardness (less than 10), the PU fluid will not leak and the sponge will not deform.

   If the hardness is over 30, the PU liquid will leak and become hardened, causing sponge deformation.

◎ Adhesion

The polyester felt + PU sponge and the sample adhered to the PU foam were cut to a width of 1 inch and the tensile strength was measured according to the measurement method of ASTM D882 (Tensile Testing of Thin Plastic Sheet).

 * Substrate breakdown: Sponge breakdown (0.5 ~ 1kgf / in or more)

◎ Freequncy

   - The sound absorption ratio of 1/3 octave band was obtained according to MS 200-39 and evaluated at 1000, 2000, 3150, 5000hz.

Example Comparative Example One 2 One 2 3 4 Product type web web Film web web web Configuration







Layer 2 3 One One One One
Adhesive layer
Furtherance Co-PET Co-PET EVA Co-PET PP PP Manufacturing method spunbond spunbond Airblown spunbond spunbond Meltblown Basis weight (g / m2) 30 30 60 60 60 60 Leakage preventing layer

Furtherance PP PP Manufacturing method Meltblown Meltblown Basis weight (g / m2) 30 30
Adhesive layer
Furtherance Co-PET Manufacturing method spunbond Basis weight (g / m2) 30 Properties









The tensile strength
(kgf / cm2) MD 1.7 1.9 1.1 2.1 1.9 0.6 CD 1.4 1.6 0.8 1.3 1.1 0.6 Elongation at break
(%) MD 59 68 214 87 35 22 CD 92 115 250 150 80 68 Breathability (cfm) - 91 51 0 680 620 80 Leakage evaluation Shore D 6 5 5 30 35 9 Adhesion
(kgf / in) The substrate layer Substrate breakdown Substrate breakdown Substrate breakdown Substrate breakdown 0.1 0.15 PU foam Substrate breakdown Substrate breakdown Substrate breakdown Substrate breakdown 0.1 0.2 Freaquency
(Hz)

1000 0.12 0.13 0.05 0.1 0.1 0.11 2000 0.2 0.22 0.13 0.14 0.13 0.15 3000 0.25 0.31 0.18 0.22 0.2 0.25 4000 0.4 0.52 0.27 0.32 0.31 0.39

As shown in the above table, the automobile interior material of the embodiment has insufficient leakage in the leakage preventing adhesive nonwoven fabric 10 by the polyurethane foam layer and has excellent bonding strength with the base layer 20 and the polyurethane (PU) foam layer, Which is superior to the comparative example.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

10: Anti-leakage bonding nonwoven fabric 11: Adhesive layer
13: leakage preventing layer 20: substrate layer
30: PU foam layer

Claims (8)

In the leakage preventing adhesive nonwoven fabric,
Two layers in which an adhesive layer and a leakage preventing layer are laminated, or three layers in which an adhesive layer, a leakage preventing layer and an adhesive layer are laminated in order,
The adhesive layer is formed by a reaction between a diol (diol) and a dicarbonic acid as a hard segment raw material, and a sponge made of a polyester type elastic resin produced by polycondensation of a polyol as a soft segment raw material Wherein the leakage preventing layer is a melt-blown nonwoven fabric using a polyolefin-based resin.
The method according to claim 1,
The diol component of the hard segment of the polyester-based elastic resin is selected from the group consisting of ethyleneglycol, diethylene glycol, 1,4-butanediol, 1,3-propanediol, 3-propanediol), or a mixture of two or more thereof.
The method according to claim 1,
The dicarbonic acid component of the hard segment of the polyester elastomer resin may be any one or two of terephthalic acid, isophthalic acid, adipic acid and sebacic acid. Wherein at least one of said nonwoven fabrics is used in admixture.
The method according to claim 1,
Wherein the polyol as a soft segment of the polyester-based elastic resin is polyethylene glycol (PEG) or polytetramethylene glycol (PTMG), and the amount of the polyol is 5 to 70% by weight relative to the polyester-based elastic resin.
The method according to claim 1,
Wherein the leakage preventing layer melt-blown nonwoven fabric has an average fiber diameter of 0.1 to 20 占 퐉.
The method according to claim 1,
Wherein the spunbond elastic nonwoven fabric to the melt-blown nonwoven fabric has a constituent fiber isotopic ratio of 1: 0.1 to 1: 0.5.
The leak-barrier bonding nonwoven fabric according to any one of claims 1 to 6, wherein the leakage preventing layer has a polyurethane foam layer on one side and a base layer on one side of the adhesive layer,
The three-layer leak-proof bonding nonwoven fabric is a vehicle interior material having a base layer bonded to both sides or a polyurethane foam layer bonded to one side of the base layer or the other side.
8. The method of claim 7,
Wherein the base layer is any one of a polyester nonwoven fabric, a polyurethane sponge, or a mixture of the polyester nonwoven fabric and the polyurethane sponge.

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