JPH0527797U - Soundproof material with excellent rigidity - Google Patents

Abstract

(57) [Summary] [Purpose] Excellent strength against normal force to the soundproof material and excellent shape retention at the end of the soundproof material, and also the weight per unit area can be reduced. The purpose is to follow severe irregularities and to have excellent rigidity. [Structure] The resin cotton and the skin layer were integrated, impregnated in a phenol resin, and then dried to form an integrated product. On one surface of the non-woven fabric, a fiber mat made of polyester fiber having nylon-6 on the fiber surface is coated with a phenol resin by spraying, and the other surface is provided with a hot melt adhesive and a glass mat. A soundproof material with excellent rigidity, which is formed by integrating and integrating the above-mentioned integrated product and press molding.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a soundproof material having excellent rigidity, more specifically, excellent strength against a force perpendicular to the soundproof material and excellent shape retention at the end of the soundproof material, and at the same time reduces the weight per unit area. Further, the present invention relates to a soundproof material having excellent rigidity, which can follow even severe irregularities by pressure molding.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, for example, as a sound insulation material made of fibers for automobiles, a molding formed by heating and pressurizing felt made of animal and vegetable fibers and synthetic resin fibers alone or with an adhesive together with a non-woven fabric skin material. Soundproofing materials are manufactured.

However, although such a molded soundproof material is excellent in deep-drawing moldability, it does not provide satisfactory performance in sound absorption, strength, and rigidity, and further has a drawback that the weight per unit area of the soundproof material itself increases. there were.

[0004]

[Problems to be solved by the device]

 The object of the present invention is to realize excellent sound absorption and deep drawing formability while reducing the weight of the soundproof material itself in order to reveal the excellent strength and rigidity of the whole including the end portion of the fiber soundproof material. On the point.

[0005]

[Means for Solving the Problems]

 As a solution to this problem, the inventors of the present invention have earnestly studied and found that a fiber mat made of polyester fiber is provided on one side of the nonwoven fabric and a sound absorbing layer is provided on the other side of the nonwoven fabric to integrate them. The gist of is below.

One side of the non-woven fabric 1 is integrated with the fiber mat 2 made of polyester fiber, and the other side is integrated with the sound absorbing layer 4 via the adhesive layer 3. A soundproof material having excellent rigidity, which is obtained by forming a layer 6 and then press-molding it.

A soundproof material having excellent rigidity, which is characterized by using a nonwoven fabric 1 made of a plant fiber material and a glass fiber material.

A soundproof material having excellent rigidity, characterized by using a fiber mat 2 made of a polyester fiber having a double-layer structure having nylon-6 on the fiber surface.

The non-woven fabric 1 may be a bulky non-woven fabric, a thin leaf-like non-woven fabric, a glass mat, a glass paper, etc. For example, in the case of a bulky non-woven fabric, it is a discontinuous fiber material of animal, vegetable, mineral, or synthetic resin type It is preferable to use one or two or more kinds and those mainly composed of a binder such as a thermosetting resin. A non-woven fabric made of synthetic resin fiber material and glass fiber material can also be preferably used in terms of improving rigidity.

As the fiber mat 2 made of polyester fiber, a fiber mat made of polyester fiber coated or dipped with nylon-6 can be used particularly preferably in order to improve the strength of the soundproofing material. Coating phenolic resin, polyester resin, epoxy resin, EVA resin, urethane resin, melamine resin, paraffin resin, etc. on one or both sides of the fiber mat by flow coating, spraying, brush etc. improves rigidity and shape retention. Is more preferable in terms of. The fiber mat preferably has a surface reinforcing function. The resin coated on the fibrous mat strongly bonds the fibrous mat and the non-woven fabric together when the heat-pressurized integration with the non-woven fabric is performed.

The adhesive layer 3 is used to integrate the non-woven fabric and the sound absorbing layer, and a hot melt or coating type adhesive is used. For example, hot melt is used in advance between the nonwoven fabric and the sound absorbing layer.

The sound absorbing layer 4 integrated with one surface of the non-woven fabric via an adhesive layer may be a bulky non-woven fabric, a thin leaf-like non-woven fabric, a glass mat, a glass paper, a foam material or the like. It is mainly composed of one or more kinds of discontinuous fiber materials of organic, vegetable and synthetic resin and a binder such as thermosetting resin. In the case of foam material, polystyrene, polypropylene, polyurethane and the like are preferable.

When the resin cotton 5 is used, resin fibers are lightly compression-molded, and examples thereof include polyester fibers, polyamide fibers, polyvinyl alcohol fibers, and polyvinyl chloride fibers.

As the skin layer 6, it is indispensable that the weight can be reduced compared to when the felt is used, and it is preferable that the skin layer 6 also has the functions of shape retention and surface reinforcement, such as glass paper, glass mat, paper and thin leaf. Nonwoven fabrics and the like can be exemplified.

The resin cotton 5 and the skin layer 6 are preferably impregnated with a thermosetting resin in advance. The thermosetting resin is a phenol resin, a polyerter resin, a urethane resin, a melamine resin, a paraffin resin or the like, and the impregnation method is preferably dipping or coating. The amount of the thermosetting resin impregnated in the resin cotton needs to be an amount that ensures the adhesion with the sound absorbing layer, and is preferably about 1 to 100% of the weight of the resin cotton.

As a method of integrally molding each of the constituent materials, for example, a fiber mat is provided on one surface of the nonwoven fabric, and a resin cotton and a skin layer are provided on the other surface via an adhesive layer and a sound absorbing layer. When the nonwoven fabric is placed by scraping, it is preferable that the condition is 140 to 250 ° C. for 15 seconds to 2 minutes and 1 to 200 kg / cm ² .

[0017]

【Example】

 Examples will be given below to provide a more detailed understanding of the present invention. Naturally, the idea is not limited to the following examples.

[0018]

Example 1 A resin cotton made of polyester fiber and a skin layer made of glass paper were integrated, impregnated in a phenol resin, and then dried to obtain an integrated product A. On one side of a non-woven fabric consisting of 50 parts by weight of hemp and 50 parts by weight of glass fiber, a fiber mat made of polyester fiber having nylon-6 on the fiber surface is coated with phenol resin by spraying, and the other side is provided. The surface of the above was integrated with the above-mentioned integrated product A by providing it with a hot melt adhesive and a glass mat. The integrated product was heated and pressed at 200 ° C. for 1 minute under the condition of 5 kg / cm ² to obtain a soundproofing material 1.

[0019]

Example 2 A resin cotton made of polyvinyl chloride fiber and a skin layer made of a glass mat were integrated, impregnated in a melamine resin and then dried to obtain an integrated product B. One side of a non-woven fabric consisting of 25 parts by weight of cotton, 25 parts by weight of hemp, and 50 parts by weight of glass fiber is coated with a phenol resin by spraying on a fiber mat made of polyester fiber having nylon-6 on the fiber surface. The fiber mat prepared above was provided, and the above-mentioned integrated product B was integrated on the other surface via a hot melt adhesive and a glass mat. 1 minute such monolith 210 ° C., to obtain a Umate soundproofing material 2 Shi were heat and pressure molded under the conditions of 5 kg / cm ^2.

[0020]

[Comparative example]

A thin leaf-shaped non-woven fabric skin material is integrated with a felt of 750 g / cm ² via an adhesive, and heated and pressed at 210 ° C. for 50 seconds under the condition of 5 kg / cm ² , and integrated to make a ceiling material 3 Got

[0021]

【Test method】

 This is a method based on JIS K 7203 "Bending test method for hard plastics", and the soundproofing materials 1 to 3 cut into a size of 50 mm x 150 mm are placed as test pieces on the fulcrums with the distance between fulcrums set to 100 mm. Then, a load is applied to the center line of the test piece with a pressure wedge at a speed of 50 mm / min, and the maximum strength (kg) at which the test piece breaks and the above-mentioned JIS Comment 7 (1) "Bending elastic modulus" are calculated. Based on the method for obtaining the gradient F / Y (F: load-deflection (kgf) {N} at an arbitrarily selected point of the first straight line portion of the load-deflection curve, Y: deflection (mm) at load F) for Bending elasticity gradient (kg / mm) was measured.

[0022]

【result】

[0023]

[Effect of the device]

 It has been clarified that the soundproofing material according to the present invention can not only maintain a satisfactory soundproofing effect but also exhibit excellent strength.

[0024]

[Brief description of drawings]

FIG. 1 is a sectional view of a soundproof material according to the present invention.

FIG. 2 is a sectional view of a soundproofing material according to the present invention.

FIG. 3 is a cross-sectional view of a polyester fiber having a two-layer structure having nylon-6 on the fiber surface.

[Explanation of symbols]

 1 Non-woven fabric 2 Fiber mat 3 Adhesive layer 4 Sound absorption layer 5 Resin cotton 6 Skin layer 7 Nylon-6 8 Polyester fiber

Claims (3)

[Scope of utility model registration request] 1. One side of a non-woven fabric 1 is integrated with a fiber mat 2 made of polyester fiber, and the other side is integrated with a sound absorbing layer 4 via an adhesive layer 3 and, if necessary, a resin cotton 5 A soundproof material having excellent rigidity, which is obtained by applying pressure molding after providing the skin layer 6. 2. The soundproof material having excellent rigidity according to claim 1, wherein the nonwoven fabric 1 made of a vegetable fiber material and a glass fiber material is used. 3. The soundproof material having excellent rigidity according to claim 1, wherein the fiber mat 2 is made of a polyester fiber having a double layer structure having nylon-6 on the fiber surface.