KR102202007B1 - Leak-proof Adhesive Nonwoven Fabric And Automobile Interior Material Using The Same - Google Patents

Abstract

In the present invention, in the leakage-preventing adhesive nonwoven fabric, consisting of two layers or three layers in which an adhesive layer and a leakage prevention layer are stacked, an adhesive layer, a leakage prevention layer, and an adhesive layer are sequentially stacked, the adhesive layer is a hard segment raw material Diol and Dicar. It is a spunbond elastic nonwoven fabric using a polyester-based elastic resin produced by esterification reaction of dicarbonic acid and polyol, a soft segment material, in the reaction product, and the leakage prevention layer is a polyethylene porous film. It relates to a leak-proof adhesive non-woven fabric characterized by a characteristic leak-proof adhesive non-woven fabric.

Description

Leak-proof Adhesive Nonwoven Fabric And Automobile Interior Material Using The Same}

The present invention relates to a leak-proof adhesive nonwoven fabric and a vehicle interior material using the same, and more particularly, to a leak-proof adhesive nonwoven fabric having a laminated structure of a low melting point polyester-based spunbond elastic nonwoven fabric and a polyethylene porous film, and a vehicle interior material using the same.

Automotive interior products are diverse, such as trunks, ceilings, floors, and door trims, and these products require features for formability, weight reduction, sound insulation, sound absorption, and sound insulation.

In general, companies that produce surface nonwoven fabrics, sound-absorbing nonwovens, and sound-insulating nonwovens respectively produce and supply them to molding companies, and after bonding a film between the surface nonwovens, sound-absorbing nonwovens and sound-insulating nonwovens supplied from the molding companies. Put in a mold and molded the interior material.

Then, since each material manufacturer that produces surface nonwoven fabric, sound-absorbing nonwoven fabric, and sound-absorbing nonwoven fabric is produced and delivered to molding companies, the loss due to the work process is serious. In addition, surface nonwoven fabric, sound-absorbing nonwoven fabric, and sound insulating nonwoven fabric are manufactured separately. Since it is manufactured and supplied through a process, it is impossible to harmoniously study the sound-absorbing and sound-insulating characteristics of each material.In particular, in order to form the surface non-woven fabric and the sound-absorbing and insulating non-woven fabric with a predetermined thickness, two or four sheets of non-woven fabric of a certain thickness are needle punched Since each work is carried out, and two or four sheets are laminated again to form a single body by needle punching, productivity is greatly reduced. Also, since the film is adhered between the surface nonwoven fabric and the sound absorbing and insulating nonwoven fabric, it is absorbed and absorbed. Since there are not many pores that function, the function as a carpet for automobile interior materials is greatly reduced.

Patent Document 1: Republic of Korea Patent Publication No. 2006-0004337 (melt blown nonwoven fabric with excellent sound absorption and heat insulation) Patent Document 2: Korean Laid-Open Patent Publication No. 2012-0132735 (nonwoven fabric having breathability, sound absorbing material using the nonwoven fabric, and manufacturing method thereof) Patent Document 3: Republic of Korea Patent Publication No. 1425852 (Integrated sound absorbing and insulating by one-punching of non-woven web 2 or 3 layers, ventilation, excellent compression recovery rate for automobile trunk, carpet material and manufacturing method thereof)

In order to solve the above problems, an object of the present invention is to provide an interior material for automobiles that can maximize weight reduction, sound insulation, sound absorption, and sound insulation effects.

In addition, the present invention provides a non-woven fabric having a breathability to provide the interior material for automobiles as described above so that a PU foam layer can be integrally formed while molding products of various shapes in a mold, so that a sound-absorbing material with improved quality can be easily produced. There is a desired purpose to make it possible.

In addition, the present invention is to provide an adhesive nonwoven fabric that can prevent leakage of the foam layer between the PU foam layer and the base layer and has excellent adhesion to the base layer.

In order to solve the above problems, the present invention is composed of three layers in which an adhesive layer and a leakage prevention layer 13 are stacked or two layers of an adhesive layer, a leakage prevention layer 13 and an adhesive layer are sequentially stacked, The adhesive layer is spun using a polyester-based elastic resin produced by esterification reaction of diol and dicarbonic acid, which are raw materials for hard segments, and polyol, which is a raw material for soft segment, to the reaction product. It is a bonded elastic nonwoven fabric, and the leakage prevention layer is a polyethylene porous film, and a leakage prevention adhesive nonwoven fabric is provided.

In addition, in the present invention, among the hard segments of the polyester-based elastic resin, the diol component is ethylene glycol (ethylne glycol), diethylene glycol (DEG), 1,4 butanediol (1,4-Butanediol), 1,3 propane. It provides a leak-proof adhesive nonwoven fabric characterized in that any one or two or more of diols (1,3-Propanediol) are used in combination.

In addition, in the present invention, the dicarbonic acid component of the hard segment of the polyester-based elastic resin is among terephthalic acid, isophthalic acid, adipic acid, and sebacic acid. It provides a leak-proof adhesive nonwoven fabric characterized in that any one or two or more are used in combination.

In addition, the present invention prevents leakage, characterized in that the polyol, which is a soft segment of the polyester-based elastic resin, is polyethylene glycol (PEG) or polytetramethylene glycol (PTMG), and is 5 to 70% by weight compared to the polyester-based elastic resin. Provides an adhesive nonwoven fabric.

In addition, the present invention is a two-layer structure leak-proof adhesive nonwoven fabric is a polyurethane foam layer on one side of the leak-proof layer 13, a base layer is bonded to one side of the adhesive layer, or a three-layer structure leak-proof adhesive nonwoven fabric is a base layer is bonded to both sides or It provides an automobile interior material with a base layer on one side or a polyurethane foam layer on the other side.

In addition, the present invention provides a vehicle interior material, characterized in that the base layer is any one of a polyester nonwoven fabric, a polyurethane sponge or the polyester nonwoven fabric and a polyurethane sponge are laminated.

In order to solve the above problems, the present invention uses a nonwoven fabric having a laminated structure of a polyester-based spunbond elastic nonwoven fabric and a polyethylene porous film as a vehicle interior material, and has excellent adhesion to the base layer and at the time of adhesion with the foam layer. There is a characteristic of improving the sound absorption properties of automobile interior materials as it has an effect of preventing leakage.

1 is a cross-sectional view of a leakage preventing adhesive nonwoven fabric composed of two layers according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of a leak-proof adhesive nonwoven fabric composed of three layers according to an embodiment of the present invention.
3 is a cross-sectional view of a vehicle interior material using an adhesive nonwoven fabric for preventing leakage of two layers, which is an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail. First, in describing the present invention, detailed descriptions of related known functions or configurations are omitted so as not to obscure the subject matter of the present invention.

The terms'about','substantially', etc. of the degree used in the present specification are used at or close to the numerical value when manufacturing and material tolerances specific to the stated meaning are presented, and are used in the sense of the present invention. To assist, accurate or absolute figures are used to prevent unfair use of the stated disclosure by unscrupulous infringers.

The present invention relates to a leak-proof adhesive non-woven fabric 10 and an automobile interior material using the same. First, when the leakage-preventing adhesive non-woven fabric 10 is described, the leakage-preventing adhesive non-woven fabric 10 includes an adhesive layer 11 and a leakage preventing layer 13 The stacked two layers or the adhesive layer 11, the leakage preventing layer 13 and the adhesive layer 11 may be composed of three layers sequentially stacked.

1 is a cross-sectional view of a leak-proof adhesive nonwoven fabric 10 composed of 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 composed of three layers according to an embodiment of the present invention.

The adhesive layer 11 is a polyester-based elastic resin produced by esterification reaction of diol and dicarbonic acid, which are raw materials for hard segments, and polyol, which is a raw material for soft segment, to the reaction product. It is a spunbond elastic nonwoven fabric using.

When explaining in detail the method for preparing the polyester-based elastic resin composition,

The esterification reaction can be prepared by two methods, and the transesterification method (DMT method) by reaction of dimethyl terephthalate (DMT) and ethylene glycol (EG) or the direct esterification method by reaction of terephthalic acid and ethylene glycol (EG). A method of increasing the length of the molecular chain by synthesizing a low molecular weight condensation product of bis-hydroxyethyl terephthalate (BHET) and BHET by (TPA method) and removing ethylene glycol (EG) by melting and condensation polymerization. have.

First, in the transesterification method (DMT method), the diol is ethylene glycol (Ethylene Glycol), diethylene glycol (DEG), 1,4-butanediol (1,4-Butanediol), 1,3-propanediol (1, 3-Propanediol) may be composed of a mixture of any one or a sub-phase of diols,

The dicarbonic acid may be a mixture of at least one or more of terephthalic 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 of the polyester-based elastic resin.

In addition, in the present invention, the polyester elastic resin constituted as described above has a hardness of 80 or less Shore D, and a melting point of 100 to 220° C. and has low melting point properties.

In addition, the spunbond elastic nonwoven fabric of the adhesive layer 11 has a basis weight (g/m2) of 20 to 40, preferably 25 to 30.

In order to improve the leakage prevention layer 13 waterproof and breathable function, a polyethylene porous film is preferable.

When the polyethylene porous film is manufactured, 1 wt% of calcium carbonate may be added to form fine pores.

3 is a cross-sectional view of a vehicle interior material using the leak-proof adhesive nonwoven fabric 10 composed of two layers, which is an embodiment of the present invention.

One surface of the leakage prevention layer 13 of the leakage prevention adhesive nonwoven fabric 10 is bonded with a polyurethane foam layer, and the automobile interior material in which the base layer 20 is bonded on one surface of the adhesive layer 11 has excellent bonding strength between each layer, and also a vehicle interior material. As a result, it has excellent sound absorption.

The polyurethane foam layer is widely used in automobile interior materials because of its excellent elasticity and sound absorption. However, when combined with other substrates, the foaming solution may penetrate during the foaming process. In particular, when foaming into the nonwoven fabric, it penetrates into the pores of the nonwoven fabric, causing a problem of sound absorption.

The polyurethane foam layer is foamed on one side of the leakage prevention layer 13 of the leakage prevention adhesive nonwoven fabric 10. The leakage prevention layer 13 is a polyethylene porous film and has very small pores so that the foaming liquid does not penetrate into the pores of the porous film. However, unlike the existing hot melt adhesive film polyolefin-based resin, pores sufficient to contain air are secured. Therefore, the secured pore structure provides excellent effects by affecting the sound-absorbing properties of automobile interior materials.

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

The features and other advantages of the present description as described above will become more apparent from the examples to be described later, and the following examples are described for illustrative purposes only and cannot be construed as limiting or limiting the protection scope of the present invention. .

Example One

The adhesive layer 11 is made of a spunbond nonwoven fabric with a basis weight (g/m2) of 30 using a copolymerized polyester-based elastic resin, and the leakage prevention layer 13 is a 30 μm thick polyethylene porous film, and the adhesive layer and two layers of leakage prevention layers To prepare a leak-proof adhesive nonwoven fabric (10) consisting of.

After laminating the PU sponge with the base layer 20 on the adhesive layer of the leakage-preventing adhesive nonwoven fabric 10 at a flame temperature of 200°C or higher and a process speed of 15 m/min by a flame laminating method, the laminated parts are sewn into a product form, By making a hole in the product, the foam layer 30 is foamed on the leakage preventing layer of the leakage preventing adhesive nonwoven fabric 10 for 130 seconds at a foaming pressure of 100 bar so that the average thickness is 5 to 20 mm, and the foam layer is in a solid state to obtain automobile interior materials.

Example 2

Same as the conditions of Example 1, but prepared a leak-proof adhesive nonwoven fabric (10) consisting of three layers of adhesive layer (11) + leakage prevention layer (13) + adhesive layer (11), and flame laminating a PU sponge as a base layer on one side. Proceeding, and PU foaming on one side to obtain automobile interior materials.

Comparative example 1~4

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

◎ Tensile strength, elongation at break

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

◎ breathable

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

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

If the hardness is over 30, the PU liquid leaks and hardens, causing sponge deformation.

◎ Adhesion

A polyester felt + PU sponge and a sample bonded with 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) to evaluate the adhesion.

* Equipment destruction: Sponge destruction (0.5~1kgf/in or more)

◎ Freequncy

-According to MS 200-39, the absorption coefficient of 1/3 Octave band was calculated and evaluated at 1000, 2000, 3150, and 5000hz.

Example Comparative example One 2 One 2 3 4 Product form web+porous film web+porous film 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 prevention layer

Furtherance PE PE Manufacturing method Porous Film (Airblown) Porous Film (Airblown) 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) - 30 17 0 680 620 80 Leakage evaluation Shore D 2 3 5 30 35 9 Poor leakage % 5 5 20 100 100 50 Adhesion
(kgf/in) Base layer Destruction of equipment Destruction of equipment Destruction of equipment Destruction of equipment 0.1 0.15 PU foam Destruction of equipment Destruction of equipment Destruction of equipment Destruction of equipment 0.1 0.2 Freaquency
(Hz)

1000 0.11 0.11 0.05 0.1 0.1 0.11 2000 0.15 0.16 0.13 0.14 0.13 0.15 3000 0.21 0.223 0.18 0.22 0.2 0.25 4000 0.33 0.35 0.27 0.32 0.31 0.39

As shown in the above table, the automobile interior material of the embodiment has insufficient leakage degree inside the adhesive nonwoven fabric 10 to prevent leakage due to the polyurethane foam layer, and has excellent bonding strength with the base layer 20 and the polyurethane (PU) foam layer, and also has breathability and sound-absorbing properties. It can be seen that it is superior to the comparative example.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope of the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

10: leakage preventing adhesive nonwoven fabric 11: adhesive layer
13: leakage prevention layer 20: base layer
30: PU foam layer

Claims (6)

In the leak-proof adhesive nonwoven fabric,
It consists of two layers or three layers in which an adhesive layer and a leakage prevention layer are stacked or an adhesive layer, a leakage prevention layer and an adhesive layer are sequentially stacked,
The adhesive layer is a spun using a polyester-based elastic resin produced by esterification reaction of diol and dicarbonic acid, which are raw materials for hard segments, and polyol, which is a raw material for soft segment, to the reaction product. A bonded elastic nonwoven fabric, wherein the leakage preventing layer is a polyethylene porous film in which fine pores are formed using calcium carbonate.
The method of claim 1,
Among the hard segments of the polyester-based elastic resin, the diol component is ethylene glycol (ethylne Glycol), diethylene glycol (DEG), 1,4 butanediol (1,4-Butanediol), 1,3 propanediol (1, 3-Propanediol) of any one or two or more of which are used in combination.
The method of claim 1,
Among the hard segments of the polyester-based elastic resin, the dicarbonic acid component is one or two of terephthalic acid, isophthalic acid, adipic acid, and sebacic acid. Leak-proof adhesive non-woven fabric, characterized in that more than one is used in combination.
The method of claim 1,
The polyol, which is a soft segment of the polyester-based elastic resin, is polyethylene glycol (PEG) or polytetramethylene glycol (PTMG), and is 5 to 70% by weight of the polyester-based elastic resin.
In the leak-proof adhesive nonwoven fabric of any one of claims 1 to 4, a polyurethane foam layer on one surface of the leakage prevention layer, and a base layer on one surface of the adhesive layer, or
A three-layered anti-leakage adhesive nonwoven fabric is an automobile interior in which a base layer is bonded to both sides or a base layer is bonded to one side or a polyurethane foam layer is bonded to the other side.
The method of claim 5,
The base layer is a polyester nonwoven fabric, a polyurethane sponge, or a vehicle interior material, characterized in that any one of the laminated polyester nonwoven fabric and polyurethane sponge.

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