KR20200062992A - Leak-proof Adhesive Nonwoven Fabric And Automobile Interior Material Using The Same - Google Patents

Abstract

The present invention provides a leak-proof adhesive nonwoven fabric for preventing leakage and having excellent adhesion to a base layer, and an automobile interior material including the same. A leak-proof adhesive nonwoven fabric according to the present invention includes two layers in which an adhesive layer and a leakage prevention layer are stacked, or three layers in which an adhesive layer, a leakage prevention layer, and an adhesive layer are sequentially stacked, wherein the adhesive layer is a spun elastic nonwoven fabric using a polyester-based elastic resin produced by esterification reaction of diol and dicarbonic acid, which are raw materials for hard segments, and condensation polymerization of polyol, which is a raw material for soft segment, to the reaction product, and the leakage prevention layer is a polyethylene porous film.

Description

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

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

Products of interior materials for automobiles are diverse, such as trunks, ceilings, floors, and door trims. These products require moldability and light weight, sound insulation, sound absorption, and sound insulation functions.

In general, the non-woven fabric for the surface and the sound-absorbing non-woven fabric and the sound-absorbing non-woven fabric are each produced and supplied to a molding company. It was put into a mold and the interior material was molded.

Then, since the production of the nonwoven fabric for the surface and the sound absorbent nonwoven fabric and the soundproof nonwoven fabric are produced and delivered to the molding company, the loss according to the work process is serious, and the surface nonwoven fabric and the sound absorbing nonwoven fabric and the soundproof nonwoven fabric are manufactured separately. Since it is manufactured and supplied in a process, it is not possible to study the sound absorption and sound insulation characteristics of each material in a harmonious manner. In particular, two or four non-woven fabrics of a certain thickness are used by needle punching to form a non-woven fabric for the surface and a sound-absorbing non-woven fabric to a predetermined thickness. Since each work is performed, and two or four sheets are laminated together to form a single body by needle punching, productivity is greatly reduced, and noise is absorbed and absorbed because the film is interposed between the nonwoven fabric for the surface and the sound absorbing sound absorbing nonwoven fabric. Since there are not many pores that function, the function as a carpet for automobile interior materials is greatly reduced.

Patent Literature 1: Republic of Korea Patent Publication No. 2006-0004337 (melt blown non-woven fabric with excellent sound absorption and insulation) Patent Literature 2: Republic of Korea Patent Publication No. 2012-0132735 (a non-woven fabric having breathability, a sound absorbing material using the nonwoven fabric, and a method for manufacturing the same) Patent Document 3: Republic of Korea Registered Patent Publication No. 145852 (Integrated sound absorption, breathability, compression recovery rate of automobile trunks, carpet materials, and manufacturing method thereof by non-woven web 2-ply or 3-ply one punching)

In order to solve the above problems, the present invention has an object to provide a vehicle interior material that can maximize the light weight, sound insulation, sound absorption, sound insulation effect.

In addition, the present invention is to provide a non-woven fabric having breathability in order to provide the interior material for automobiles as described above, so that a product having various shapes can be formed in a mold and integrally form a PU foam layer, so that sound-absorbing materials with improved quality can be easily produced. There is a desired purpose of doing so.

In addition, the present invention is to provide a leak-proof 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 two layers in which the adhesive layer and the leakproof layer 13 are laminated, or three layers in which the leakproof layer 13 and the adhesive layer are sequentially stacked in the leakproof adhesive nonwoven fabric. The adhesive layer is a spun using a polyester-based elastic resin produced by esterifying a hard segment raw material, Diol, and dicarbonic acid, and condensing the reactant with a soft segment raw material, Polyol. It is a bond elastic nonwoven fabric, and the leakproof layer provides a leakproof adhesive nonwoven fabric characterized by being a leakproof adhesive nonwoven fabric characterized by being a polyethylene porous film.

In addition, the present invention is a diol (Diol) component of the hard segment of the polyester-based elastic resin, 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 mixed and used.

In addition, the present invention is a dicarboxylic acid (Dicarbonic acid) component of the hard segment of the polyester-based elastic resin of terephthalic acid (Iephthalic acid), isophthalic acid (Isophthalic acid), adipic acid (Adipic acid) and sebacic acid (Sebacic acid) of It provides a leak-proof adhesive non-woven fabric, characterized in that any one or two or more are mixed.

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

In addition, in the present invention, the two-layer structure of the leak-proof adhesive non-woven fabric is a polyurethane foam layer on one side of the leak-proof layer 13, a base layer is bonded on one side of the adhesive layer, or a three-layer structure of the leak-proof adhesive non-woven fabric is bonded on both sides of the base layer. Provided is an automobile interior material having a base material layer on one surface or a polyurethane foam layer on the other surface.

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.

In order to solve the above problems, the present invention uses a non-woven fabric having a laminated structure of a polyester-based spunbond elastic non-woven fabric and a polyethylene porous film as an automobile interior material, as well as excellent adhesion to the base layer and upon adhesion to the foam layer. It has the effect of preventing leakage and has improved sound absorption properties of automobile interior materials.

1 is a cross-sectional view of a leak-proof adhesive nonwoven fabric composed of two layers, which is an embodiment of the present invention.
2 is a cross-sectional view of a leak-proof adhesive nonwoven fabric composed of three layers, which is an embodiment of the present invention.
3 is a cross-sectional view of a vehicle interior material using a leak-proof adhesive nonwoven fabric composed 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 will be omitted so as not to obscure the subject matter of the present invention.

As used herein, the terms'about','substantially', etc. are used in the sense of or close to the numerical values when manufacturing and material tolerances unique to the stated meaning are presented, and to understand the present invention. To aid, accurate or absolute figures are used to prevent unscrupulous use of the disclosed disclosure by unscrupulous infringers.

The present invention relates to a leak-proof adhesive non-woven fabric 10 and a vehicle interior material using the same, first described with respect to the leak-proof adhesive non-woven fabric 10, the leak-proof adhesive non-woven fabric 10 is the adhesive layer 11 and the leak-proof layer 13 The laminated two layers or the adhesive layer 11, the leak-proof 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, which is one embodiment of the present invention, and FIG. 2 is a cross-sectional view of a leak-proof adhesive nonwoven fabric 10 composed of three layers, which is one embodiment of the present invention.

The adhesive layer 11 is a polyester-based elastic resin produced by esterifying a hard segment raw material diol and dicarbonic acid and condensing the reactant with a soft segment raw material polyol. It is a spunbond elastic nonwoven fabric.

When explaining in detail the manufacturing method of the polyester-based elastic resin composition,

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

First, in the transesterification method (DMT method), the diol (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 any one or a mixture of any one sub-diol,

The dicarbonic acid may be used by mixing at least one of terephthalic acid, isophthalic aicd, adipic acid and sebacic acid,

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

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

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

Polyethylene porous film is preferred to improve the leak-proof layer 13 waterproof and breathable function.

The polyethylene porous film may be prepared by adding 1 wt% of calcium carbonate during manufacturing to form a fine hole.

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

A car interior material having a polyurethane foam layer bonded to one surface of the leak-proof layer 13 of the leak-proof adhesive non-woven fabric 10 and a base layer 20 coupled to one surface of the adhesive layer 11 has excellent bonding strength between each layer and also an automobile interior material. It is excellent in sound absorption.

The polyurethane foam layer is excellent in elasticity and sound absorption, and is often used in automobile interior materials. However, when combined with other substrates, the foaming liquid may penetrate during the foaming process. In particular, when foaming into a nonwoven fabric, it may penetrate into the nonwoven fabric pores, which may cause sound absorption problems.

The polyurethane foam layer is foamed on one side of the leak-proof layer 13 of the leak-proof adhesive nonwoven fabric 10. The leakage-preventing layer 13 is a polyethylene porous film having very small pores so that the foaming solution does not penetrate into the pores of the porous film. However, unlike conventional hot-melt adhesive film polyolefin-based resins, pores sufficient to contain air are secured. Therefore, the secured pore structure provides an excellent effect by affecting sound absorption properties in automobile interior materials.

The base layer 20 may be made of a general polyester (PET) non-woven fabric or polyurethane sponge. Or it may be composed of a general polyester (PET) non-woven fabric and a polyurethane sponge laminated structure.

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

Example One

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

After laminating the PU sponge with the base layer 20 on the adhesive layer of the leak-proof adhesive non-woven fabric 10 in a flame laminating method at a flame temperature of 200° C. or higher and a process speed of 15 m/min, after sewing the laminated parts in the form of a product, By making a hole in the product, the foam layer 30 is foamed on the leak-proof layer of the adhesive-free non-woven fabric 10 for 130 seconds at a foaming pressure of 100 bar to give an average thickness of 5 to 20 mm, and the foam layer is hardened to obtain a car interior material.

Example 2

The same conditions as in Example 1 were prepared, but the leakage-resistant adhesive non-woven fabric 10 composed of three layers of an adhesive layer 11 + a leak-proof layer 13 + an adhesive layer 11 was prepared, and on one side, a PU sponge, a base layer, was subjected to flame laminating. Proceed, and PU foam on one side to obtain a vehicle interior material.

Comparative example 1-4

In the comparative example, a polyurethane foam layer was laminated on one surface using a leak-proof adhesive nonwoven fabric 10 composed of one layer of a film or web structure, and a PET nonwoven fabric was laminated on the other surface, followed by heating and bonding to obtain a vehicle interior material. The rest of the conditions are the same as in Example 1.

◎ Tensile strength, elongation at break

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

◎ Breathable

-The breathability 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 measurement was made according to the method of ASTM D2240.

* The lower the hardness (10 or less), the PU liquid does not leak and the sponge does not deform.

If the hardness is 30 or more, the PU liquid becomes leaky and hardens, causing a deformation of the sponge.

◎ Adhesion

The sample bonded with the polyester felt + PU sponge and PU Foam was cut to a width of 1 inch to measure the tensile force according to the method of measuring ASTM D882 (Tensile Testing of Thin Plastic Sheet) to evaluate the adhesive force.

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

◎ Freequncy

-Based on MS 200-39, the sound absorption rate 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 type 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 Leak-proof 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 Leak evaluation Shore D 2 3 5 30 35 9 Poor leakage % 5 5 20 100 100 50 Adhesion
(kgf/in) Base layer Substrate destruction Substrate destruction Substrate destruction Substrate destruction 0.1 0.15 PU foam Substrate destruction Substrate destruction Substrate destruction Substrate destruction 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 table above, the automotive interior material of the embodiment has insufficient level of leakage inside the adhesive non-woven fabric 10 by 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 absorption. 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 present invention without departing from the technical spirit of the present invention. It will be obvious to those who have the knowledge of

10: leak-proof adhesive non-woven fabric 11: adhesive layer
13: leak-proof layer 20: base layer
30: PU foam layer

Claims (6)

In the leak-proof adhesive nonwoven fabric,
It consists of two layers in which the adhesive layer and the leak-proof layer are laminated, or three layers in which the adhesive layer, the leak-proof layer and the adhesive layer are sequentially stacked,
The adhesive layer is a spun using a polyester-based elastic resin produced by esterifying a hard segment raw material, Diol and dicarbonic acid, and condensing the reactant with a soft segment raw material, Polyol. Bond elastic non-woven fabric, the leak-proof layer is a leak-proof adhesive non-woven fabric characterized in that the polyethylene porous film.
According to claim 1,
Diol component of the hard segment of the polyester elastic resin is ethylene glycol (ethylne Glycol), diethylene glycol (DEG), 1,4 butanediol (1,4-Butanediol), 1,3 propanediol (1, 3-Propanediol) A leak-proof adhesive non-woven fabric, characterized in that any one or two or more of them are mixed and used.
According to claim 1,
Among the hard segments of the polyester-based elastic resin, dicarbonic acid component is any one or two of terephthalic acid, isophthalic acid, adipic acid, and sebacic acid. A leak-proof adhesive nonwoven fabric, characterized in that more than two dogs are mixed and used.
According to claim 1,
The polyol, which is a soft segment of the polyester-based elastic resin, is polyethylene glycol (PEG) or polytetramethylene glycol (PTMG), and a leak-proof adhesive nonwoven fabric, characterized in that it is 5 to 70% by weight compared to the polyester elastic resin.
The leakage-resistant adhesive non-woven fabric having a two-layer structure according to any one of claims 1 to 4 has a polyurethane foam layer on one side of the leak-proof layer and a base layer on one side of the adhesive layer,
The three-layer structure of the leak-proof adhesive non-woven fabric is a car interior material on both sides of which a base layer is bonded or a base layer on one side or a polyurethane foam layer on the other side.
The method of claim 5,
The base layer is automotive interior material, characterized in that any one of a polyester nonwoven fabric, a polyurethane sponge or the polyester nonwoven fabric and a polyurethane sponge.

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