JPH04153B2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention provides a comfortable living environment and research facilities by reducing the negative effects of vibration in buildings such as residences and research facilities where vibration noise is averse. It relates to vibration-proof sheet materials used to create environments.

(Conventional technology) Conventionally, flooring materials have been made of single-layer wood such as teak or oak, which is often referred to as flooring.
Some used floor tiles such as porcelain tiles and cork tiles, and others were made of vinyl-based (for example, hard vinyl chloride-based) synthetic resin. Also,
There were also flooring materials in which epoxy or urethane resin was applied directly to the floor.

Other flooring materials with intentionally enhanced vibration-proofing properties include special vinyl cushioning flooring materials, cork-containing flooring materials, and rubber-based flooring materials. Among these, an example of a vinyl cushioning flooring material is one in which a surface material made of vinyl chloride is laminated with foamed vinyl chloride resin as an intermediate material, and a backing material made of glass fiber is further laminated on the first intermediate material. The surface layer material and the intermediate material and the intermediate material and the backing material were each bonded using an adhesive such as latex-based synthetic rubber.

(Problem to be solved by the invention) In recent years, in various places such as residences, factories, and laboratories,
Vibration noise is generated due to various causes, and it is extremely important to take measures to ensure a residential environment that does not cause or be inconvenienced by vibrations, and to prevent precision equipment and equipment from being adversely affected by vibrations. It's becoming important.

However, it has become difficult to solve the vibration problem by using conventional sheet materials without modification. If conventional sheet materials are used to strengthen vibration isolation as a countermeasure, the wall thickness must be increased or expensive materials with vibration isolation properties must be selected. There was a problem that the economic burden would be large.

This invention was made with attention to the above problems, and has vibration-proofing properties that can ensure a comfortable living environment without vibration and noise problems, and
The purpose is to provide a vibration-proof sheet material that can reduce manufacturing costs and reduce economic burden.

[Structure of the Invention] (Means for Solving the Problems) The vibration-proof sheet material according to the present invention is made of a viscoelastic resin that has viscoelasticity at room temperature after curing and has a penetration degree within the range of 80 to 200. It is characterized in that it is interposed between a surface layer material and a back layer material made of an appropriate material other than the viscoelastic resin, leaving a space.

The penetration degree of the viscoelastic resin is based on the penetration test specified in JIS K 2207. If the penetration degree exceeds 200 at room temperature after curing, it is too soft and may not be deformed by external force. On the other hand, if it is less than 80, it is too hard and easily transmits vibrations. Therefore, the penetration degree of the viscoelastic resin used in this invention is The degree is
It is assumed to be within the range of 80 to 200.

In addition, if the thickness of the viscoelastic resin is thinner than 0.2 mm, the vibration damping effect will be large, and if it is thicker than 10.0 mm, the economical efficiency will be poor. It is reasonable and preferable to intervene in the range of mm to 10.0 mm.

Furthermore, the contact area ratio of this viscoelastic resin to each of the above-mentioned surface layer material and backing layer material is not particularly limited, but in order to obtain sufficient vibration damping properties, it is desirable that the contact area ratio be at least 10%. In this case, the viscoelastic resin can be interposed between the surface layer material and the back layer material in various patterns as shown in FIGS. 2b, c and 4b. The pattern formation methods include creating and pasting pattern-shaped viscoelastic resin, screen printing, coating the entire surface of the surface or backing material and then removing non-contact areas, and screen printing. There are methods such as printing using a paper pattern and applying from above with a squeegee, etc., and any method can be selected from these methods.

Furthermore, when interposing the viscoelastic resin between the surface layer material and the backing layer material, since the viscoelastic resin itself has adhesive strength at room temperature after curing, an adhesive may be used. It doesn't require anything.

Example 1 A vibration-proof sheet material according to an example of the present invention will be described below with reference to FIGS. 1 and 2.

The anti-vibration sheet material 1B shown in FIG. 1 consists of a 2 mm thick surface layer material 2 made of hard vinyl chloride resin (hereinafter abbreviated as hard vinyl chloride), and a 1 mm thick back layer material 4 made of hard vinyl chloride resin. During this time, a silicone-based viscoelastic resin 3 having a penetration degree at room temperature after curing (hereinafter, "penetration degree at room temperature after curing" is referred to as "penetration degree") is applied. This is done by leaving a space between them. The viscoelastic resin 3 has a thickness of 0.5 mm, and as shown in FIG. The "contact area ratio" for each contact area ratio (referred to as "contact area ratio") is 50%, and the adhesive is not used. Furthermore, the vibration isolating sheet material 1C shown in FIG.
C is a square with each side being 300 mm.

Then, a comparison of the vibration-proofing performance based on the difference in the contact area ratio between these vibration-proof sheet materials 1B, 1C and the vibration-proof sheet material 1A with a contact area ratio of 100%, and the vibration-proof sheet materials 1A, 1B, In order to compare the vibration damping performance of 1C and a conventional sheet material (hard PVC veneer with a thickness of 3 mm), the following tests were conducted.

In this test, a sample sheet material was pasted on concrete with a thickness of 100 mm, and a weight of 100 g was applied from above.
A steel ball is dropped and vibrations are measured on concrete 1m away from the point of fall.
Through this test, the measurement results shown in FIG. 3 were obtained.

According to this result, the contact area ratio is 50% and 10%, respectively.
There is almost no difference in the vibration-proofing performance between the vibration-proof sheet materials 1B and 1C with a contact area ratio of 100% and the vibration-proof sheet materials 1A with a contact area ratio of 100%. The difference in vibration damping performance between 1C and conventional sheet materials was significant.

Therefore, the contact area ratio of the viscoelastic resin 3 is 100
It can be seen that even if the contact area ratio is less than 100%, that is, even if a space is formed, the vibration damping performance is almost the same as when the contact area ratio is 100%, and compared to conventional sheet materials. It was verified that the material had very good vibration damping performance.

Example 2 Next, a vibration-proof sheet material according to a second example of the present invention will be explained using FIGS. 4a and 4b.

The vibration isolating sheet material 1a shown in FIG. 4a includes a 1 mm thick surface layer material 2a made of soft vinyl chloride resin (hereinafter abbreviated as soft vinyl chloride), and a 1 mm thick back layer material 4a made of soft vinyl chloride resin. A 3 mm thick acrylic viscoelastic resin 3a having a penetration degree of 100 is interposed between the acrylic resin 3a and the acrylic viscoelastic resin 3a with a thickness of 3 mm, leaving a space between the two and forming a square with each side of 300 mm. As shown in FIG. 4b, the viscoelastic resin 3a is formed into a patchy shape with a contact area ratio of 50%.

And the vibration isolating sheet material 1 in the second embodiment
a and conventional sheet material (commercially available 5 mm thick)
A similar test was conducted under the same conditions as in Example 1 in order to compare the anti-vibration performance with that of the cork-filled vinylium.

As a result, when comparing the vibration-proof sheet material 1a and the conventional sheet material in all-pass, which represents the overall strength of all frequencies, the former has a lower vibration acceleration level.
The vibration isolation performance was 55dB, which was significantly lower than the latter's 62dB.

In addition, the front and back layer materials 2 of the vibration-proof sheet material 1a
Although a and 4a are made of soft PVC plates, the vibration isolating sheet material 1B of Example 1, in which the front layer material 1a is made of hard PVC sheets, and the back layer materials 2 and 4 are made of hard PVC plates, respectively.
Since it has the same anti-vibration performance as 1C, it was possible to select appropriate materials for the surface layer material and the back layer material.

[Effects of the Invention] As explained above, the vibration-proof sheet material of the present invention comprises a viscoelastic resin that has viscoelasticity at room temperature after curing and has a penetration degree within the range of 80 to 200. Since the surface layer material and back layer material are made of an appropriate material other than elastic resin and are laminated with a space left between them, the vibration damping properties are greatly improved compared to conventional sheet materials. , it is possible to ensure a comfortable living environment that does not cause inconvenience due to vibration noise, and it is possible to reduce the burden of expenses by keeping manufacturing costs low. It has very excellent effects.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view illustrating the structure of the vibration-proof sheet material (contact area ratio of viscoelastic resin with respect to the surface layer material and the back layer material is 50%) in Example 1 of the present invention, and FIG. Contact area ratio of viscoelastic resin
A horizontal sectional view of the viscoelastic resin layer of the vibration isolating sheet material shown in FIG.
Figure c is an explanatory horizontal cross-sectional view of the viscoelastic resin layer of the vibration isolating sheet material shown in Figure 1 in which the contact area ratio of the viscoelastic resin in the vibration isolating sheet material is 10%. Each anti-vibration sheet material shown in Fig. 2 b and c, the comparative anti-vibration sheet material with a contact area ratio of 100% shown in Fig. 2 a, and the conventional vinyl chloride resin veneer (thickness 3 mm) were used. Figures 4a and 4b are vertical cross-sectional views and viscoelastic resin layers, respectively, illustrating the structure of the vibration-isolating sheet material in the second embodiment of the present invention. FIG. 1B, 1C, 1a... Vibration-proof sheet material, 2, 2a
...Surface material, 3,3a...Viscoelastic resin, 4,4a
... Back layer material.

Claims (1)

[Claims] 1 After curing, it has viscoelasticity at room temperature and has low penetration.
1. A vibration-proof sheet material characterized in that a viscoelastic resin having a molecular weight of 80 to 200 is interposed between a surface layer material and a back layer material made of an appropriate material other than the viscoelastic resin, leaving a space.