JPS5848120Y2 - Woven fiber web laminate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fiber web laminate for a soundproof mat, which is suitable for mold thermoforming and is made by laminating different types of fiber webs.

BACKGROUND ART Conventionally, it is well known to form a molded product by laminating a sheet-like material such as an ordinary woven or knitted fabric or non-woven fabric without surface reinforcement or decoration to a soundproof mat-like base material.

However, since a special adhesive is required when bonding these ordinary sheet-like materials, problems have arisen in terms of work and cost.

To avoid these problems, do not use adhesives.
A method of thermally fusing the matte base material and the sheet-like material is preferred.

However, in the case of the heat fusion method, it is known that when a normal sheet-like material is used, it sticks to the mold for molding.

Therefore, in order to shape the bottom with a mold, it is necessary to give the sheet-like material the contradictory functions of exhibiting mold releasability with respect to the mold and exhibiting fusion properties with respect to the base material. However, this requirement is not met by conventional knitted and nonwoven fabrics.

As a result of intensive study of these problems, the inventor of the present invention has arrived at the invention of a fiber web laminate for a soundproof mat that is practical and fully satisfies these required characteristics.

One surface layer of the fibrous web laminate for a soundproof mat according to the present invention is made of fibrous web A, and the other surface layer is made of fibrous web B which exhibits a thermal fusing temperature that is at least 5° C. lower than that of A, A release agent is provided on the surface of the web A side.

and the surface of the web A side has a mold release function,
The surface of the web B side has an adhesive function, so that it can be integrally molded with a mold together with a base material.

Here, the thermal fusion temperature is defined by the following method.

That is, 5 kg/cm of the sample was applied to a chromium-plated matte finish metal surface of 120 to 150 mesh at a predetermined temperature.
The lowest temperature among the temperatures at which the adhesive force of the sample after deweighting by pressing at a pressure of m2 for 1 minute is 0.1 g weight/cm2 or more on the metal surface at the temperature. The following measurement methods are available.

A sample to be measured (to be used as the web A or B) is prepared so that the weight area density is 0.1 g/cm2, and the sample is kept at room temperature at which no adhesive force occurs at the measurement temperature. Place the sample on a table, then press the sample from above on the metal surface at a pressure of 5 kg/cm2 for 1 minute, deweight, and make the lowest temperature of the metal surface where the sample is on the metal surface side. The temperature is measured and taken as the heat fusion temperature.

The web used for the fibrous web A of the present invention is mainly a high melting point condensation polymer (nylon 6, nylon 66).
, polyethylene terephthalate, polybutylene terephthalate, etc., or a mixture thereof), and the surface of the web A is impregnated or coated with a liquid release agent such as silicone oil or liquid paraffin, or is coated with graphite particles, carbon black, kaolin, etc. A mold release agent consisting of solid particles such as molybdenum disulfide is sprayed or applied.

Further, at this time, a liquid mold release agent and solid particles may be used in combination.

The web used for the fibrous web B of the present invention exhibits a thermal fusion temperature that is at least 5° C. lower than that of the fibrous web A, and when the high melting point condensation polymer is used as the web A, polypropylene is used.

Constructed from polyethylene, polystyrene, etc. or a mixture thereof.

It is preferable that the fibrous web A and the fibrous web B of the present invention have mutually different colors in order to distinguish between the front and back sides.

There are various methods for laminating and pressing the web into multiple layers.

For example, there is a method in which the webs are overlapped and stretched in the lateral direction while overfeeding, and then pressed at room temperature or heated.

The web can be manufactured by various non-woven fabric manufacturing methods, such as the burst fiber method in which gas is blown into a melt as in the invention of Japanese Patent Publication No. 47-36833, the direct fiber application, and short fiber manufacturing. There are manufacturing methods such as dispersion and tow spreading.

In particular, webs manufactured using the burst fiber method can be easily laminated into a multilayer structure and satisfy both release and adhesion properties.
Moreover, it has the feature of being easily deformed according to the mold.

By this method, for example, in FIG. 1, web A is polyethylene terephthalate, web B is polypropylene 6-ethylene,
Then, a fibrous web laminate can be formed in which A is silicone oil.

Specifically, a porous fiber network made of polyethylene terephthalate (PET) and polypropylene (PP) was obtained by a method such as that described in Japanese Patent Publication No. 47-36833, and silicone oil was applied to the outermost layer of the polyethylene terephthalate network. The above laminate is obtained by coating, then laminating each layer, spreading while overfeeding, and hot pressing at about 160°C.

This laminate has a heat fusion temperature of 200° C. or more on one side (PET side) and a heat fusion temperature of 160° C. or less on the opposite side (PP side).

The basis weight can be varied from 10 g/m2 to 400 g/m2.

When hot pressed under the above conditions at 40g/m2, 1
The thickness is approximately 20 μm.

The laminate of the present invention can be used in various applications as a soundproof mat, especially when it is thermally molded together with a base material using a mold and integrated.

For example, the web B is placed on top of a base material (so-called hawk) made by sprinkling phenol resin particles on cotton waste, and
The web A is placed on the side of the heated mold, and when the laminated structure thus constructed is hot-pressed, a molded product of a predetermined shape can be easily released from the mold, and the laminated product that has become a molded product can be easily released from the mold. The adhesion between the body and the base material is strong.

This molded product is mainly used as soundproof mats for automobiles and buildings.

In addition, to manufacture soundproof mats, glass fiber mats,
Base materials such as films, natural wood 7 and synthetic wood can also be used.

[Brief explanation of the drawing]

FIG. 1 shows the web structure of a typical laminate for a soundproof mat according to the present invention. A in the figure corresponds to web A, B corresponds to web B,
A represents a mold release agent.

Claims (1)

[Scope of utility model registration request] In a laminate having fibrous web A on one surface layer and fibrous web B on the other surface layer, fibrous web B exhibits a thermal fusing temperature at least 5° C. lower than fibrous web A, and A fiber web laminate for a soundproof mat, which has a mold release agent and can be integrally molded with a base material using a mold.