JPS61273940A - Collapsible material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a shock absorbing material, and particularly to a laminated shock absorbing material comprising a foamed material and/or a gel-like substance and a synthetic resin film that airtightly covers the same. Regarding.

[Prior Art] Shock-absorbing parts for industrial use in self-defense products such as shoe soles, various sports protectors, and helmets have built-in shock-absorbing materials for mitigating the impact.

Traditionally, sponges have generally been used as shock absorbers, but sponges do not have sufficiently high shock absorbing performance, and in order to obtain the necessary shock absorbing performance, it is necessary to make the material thicker. . However, due to constraints such as the shape and weight of the product, it is not possible to make the material thicker, and when sponge is used in the above-mentioned products, it may not be possible to provide sufficient shock absorption performance.

For this reason, improved sponges with relatively high shock absorption performance have recently been developed and are now commercially available. In addition to sponge, non-foamed rubber,
Urethane shock absorbers, air cushions, etc. are also available.

[Problems to be Solved by the Invention] However, even the improved sponge still does not have sufficient shock absorption properties1.For example, when used in shoe soles, it can exhibit a shock absorption effect during normal walking and running. If a strong impact force is applied, such as when jumping, the impact will bottom out and the impact absorption effect will be significantly reduced. Furthermore, there were problems such as permanent deformation due to long-term use, and a hard feel in cold weather, resulting in the inability to exhibit a stable shock absorbing effect, which severely limited its use.

On the other hand, non-foamed rubber and urethane-based shock absorbers have relatively high shock absorption properties and can be effective against strong impacts, but their use is still limited because they are heavier than sponges. be done.

, 1. In addition, with air cushions,
Sufficient thickness and volume are required to absorb large impacts.1. Moreover, the response to impact is low, and the impact absorption is only 4°.

- It has the disadvantage of being time consuming. Moreover, there are enough empty spaces.
Any problem that requires measures to prevent air leakage or an air replenishment mechanism.

FQi.
Light Dopa was developed to provide a shock absorbing material that has excellent shock absorption properties against a wide range of impact forces, and has significantly improved permanent deformation properties due to long-term use, and is made at 20°C. impact resilience is 25% or less, density is 0.05-0
．． A shock absorbing base material made of a foamed material with a tensile strength of 9 g/cm" and/or a gel material with an SRIS hardness of 50" or less and an impact resilience of 25% or less, with a tensile strength of 100 kg.
/crn' or more, elongation at break 50% or more, thickness lθ ~
Shock absorbing material characterized by being airtightly sealed with a 2000 μm synthetic resin film.

The main points are as follows.

The present invention will be explained in detail below with reference to the drawings.

1 to 5 are diagrams showing embodiments of the present invention6
As shown in FIG. 1, the l111 absorbent material l of the present invention is made by airtightly sealing a shock absorbing base material 2 with a synthetic resin film 3.

In the present invention, the shock absorbing base material 2 has a rebound resilience of 25% or less, preferably 15% or less, and a density of 0.0 at 20°C.
5-0, 9 g/c, preferably 0.1-0.
It is made of a foamed material with a hardness of 7 g/cm'' and/or a gel-like material with an SRIS hardness of 50' or less and an impact resilience of 25% or less.

Examples of the foamed material include foamed rubber and urethane sponge. For example, 46 ■ Styrene content is 40 to 75
1 part of polymer 1OOffi consisting of styrene-butadiene copolymer or styrene-butadiene copolymer of IL%% and other rubber components of 0 to 40% by weight of the total, @30 to 300 parts by weight of filler.

Low resilience rubber foam obtained by adding a vulcanizing agent and a vulcanization accelerator to a mixture consisting of @ 5 to 100 parts by weight of a plasticizer, ■ 0.5 to 60 parts by weight of a blowing agent, and curing by heating and foaming 7. ,4″′
. ′°゛.

If the impact resilience of such a foam material at 20°C exceeds 25%, the impact absorbing material will not have sufficient impact absorption performance, and if the density exceeds 0.9 g/crn, the amount of the impact absorbing material will be reduced. If the density is less than 0 or 0.5 g/cm, the impact absorption performance and strength will be insufficient.

Furthermore, examples of the gel-like substance include silicone polymers and the like. The hardness of gel-like substances measured by SRIS is measured using the Asker-C type hardness tester (Japan Rubber Association Standard 0101).
Hardness determined by hardness measurement by hardness 5
If the angle exceeds 0°, the improvement effect of the present invention cannot be obtained in the impact absorbing material.

The hardness of the gel material according to SRIS is preferably 30°
The following are preferred. Note that the reason for limiting the impact resilience of the gel material is the same as that of the foamed material described above.

Synthetic resin films having a tensile strength of 100 kg/crn or more, an elongation at break of 50% or more, and a thickness of lθ to 2000 μm for airtightly sealing such a shock-absorbing base material include urethane, polyester, nylon, and polyethylene. Examples include synthetic resin films such as.

Synthetic resin film has a tensile strength of 100kg/:'Cr
If the film is less than n', has an underline, or has an elongation at break of less than 50%, the strength of the film is insufficient and it is difficult to use it for various purposes as a shock absorbing material, and if the film thickness is less than 10 gm, it is easy to tear. , 2,000 gm, the thickness of the film is too large and becomes difficult to deform, so that the excellent shock absorbing performance of the shock absorbing base material cannot be fully exhibited.

The shock absorbing material 1 as shown in FIG. 1 is made by covering a shock absorbing base material 2 of a desired shape with a synthetic resin film 3, and bonding the ends A by heat-sealing or the like to form an airtight laminate. It is easier to manufacture.

Although FIG. 1 shows a shock absorbing material made of a laminate in which one shock absorbing base material 2 is sealed with a synthetic resin film 3, the shock absorbing material of the present invention has two shock absorbing base materials. Laminated in multiple layers by stacking more than one layer.

It is also possible to have a structure sealed with a synthetic resin film. In this case, a plurality of shock absorbing base materials 2 may be layered and covered with a synthetic resin film, but as shown in FIG. A plurality of structures 4 (covered with a synthetic resin film 3) are
In the shock absorbing material shown in FIG. In the case of a foamed material, a thermosetting synthetic resin is applied to the surface of each base material, and then the synthetic resin is heated and cured to form an airtight structure.

A plurality of such airtight structures may be stacked and the entire structure may be covered with a synthetic resin film.

The synthetic resin film covering the shock-absorbing base material or its airtight structure can be pre-ill-molded to make it easier to coat, thereby making it easier to manufacture the shock-absorbing material of the present invention. .

In the present invention, when producing a shock absorbing material having a relatively large shape, a plurality of impact absorbing materials (see FIG. 3 and FIG. It is also possible to have a structure in which nine (9) shock absorbing basic structures 5 are connected, like this
One. , made. For example, it can be manufactured as follows. That is, a plurality of shock absorbing base materials 2 preferably sealed with a synthetic resin film 3 or the like as described above to form an airtight structure are stacked one on top of the other (three in FIG. 4), and the mating surfaces are adhered to form a basic structure. 5. Then, a plurality of basic structures 5 are arranged in parallel at one interval, and the entirety of these is further covered with a synthetic resin film 6 and fused to bond the adjacent basic structures 5 to each other.

In the shock absorbing material having the shape as shown in FIGS. 3 and 4, the size of the basic structure 5 is 1 to 900 cm in plan area.
If the zero area is smaller than tcrn', there will be too many divisions and the number of production steps will increase, which is industrially and economically disadvantageous. Furthermore, if the area is larger than 900 cm', the impact absorption effect may be reduced.

In the present invention, the shape of the impact absorbing material is not limited to those shown in FIGS. It can also be a polygon such as a pentagon or a hexagon, or any shape surrounded by a curved line.

In addition, in the present invention, when the shock-absorbing base material 2 is hermetically sealed with the synthetic resin film 3, in addition to the method in which the shock-absorbing material 2 and the synthetic resin film 3 are brought into close contact with each other as shown in FIGS. As shown in FIGS. 5 and 6, a gap 7 may be left between the material 2 and the film 3 to seal it. By leaving the gap in this way, the impact-absorbing base material It is possible to speed up the return when restoring item 2. Even in this case, a structure corresponding to that shown in FIG. 4 in which a plurality of basic structures are connected may be used.

The shock absorbing material of the present invention is lightweight, has extremely excellent shock absorption properties, and has improved permanent deformation due to long-term use, so it can be used for sports shoes such as jogging, tennis, and basketball shoes, and various work shoes. Shock absorbing materials for shoe soles, helmets, supporter 1 torso pads, etc.
Shock-absorbing materials for protectors of various sporting goods such as T-guards, shoulder bats, etc., martial arts equipment (mask, torso, magic hand, shin guard, etc.)
It can be effectively applied to an extremely wide range of applications, including shock absorbing materials for industrial use, construction, safety, helmets for motorcycles, shock absorbing materials for cars, and other industrial shock absorbing parts.

[Function] t, ' Impact resilience at 20°C is 25% or less, density is 2., pi,, 0, 0, 05 to 0.9 g/cm3
The foam material length is /□ 11. ,,- or hardness by SRIS is 50
The absorbing and absorbing base material is made of a gel-like material with a rebound resilience of 25% or less and has a tensile strength of 100 kg/cm or more and a breakage of 45%.
．． Elongation at time of 50% or more Te thickness is 10~20o
1゜1.0μm. By airtightly sealing with a synthetic resin film, it is possible to obtain a shock-absorbing material that is lightweight, has high shock-absorbing properties, and has greatly improved permanent deformability.

When the shock-absorbing base material is sealed with a synthetic resin film, by providing a void inside, it is possible to speed up the recovery process.

[Examples] The present invention will be described in more detail with reference to Examples and Comparative Examples below, but the present invention is not limited to the following Examples unless it exceeds the gist thereof.

Examples 1 to 7, Comparative Example 1 A shock absorbing material was produced by using the shock absorbing base material shown in Table 1 and airtightly sealing it with the synthetic resin film shown in Table 1.

Table 1 shows the properties of the shock absorbing material obtained.

From Table 1, it is clear that the impact absorbing material of the present invention has a low impact acceleration peak value and has significantly improved impact absorption performance. In particular, by laminating multiple layers of impact-absorbing base materials, it becomes possible to absorb even large impacts well, and the impact-absorbing performance is further improved.

In addition, the impact acceleration time is relatively short, and the responsiveness of impact absorption is excellent. Moreover, the permanent deformation strain is small, the permanent deformability is greatly improved, and it is lightweight enough to be applied to a wide range of applications.

Note that in Table 1, *l to *8 are as follows.

*1: A low-resilience rubber foam obtained by adding a vulcanizing agent and a vulcanization accelerator to the following mixture and curing it by heating.

*2: CUBICE ENGINEERING
C:0. LTD product name "β-Gel" *3: (:UBICENGNEERING CO
, LTD product name "α-Gel" *4: LORD Chemical Produ
CTS polyurethane film Product name rTuftan
e J*5: Measured with a Dunlop trypsometer (20
(value in °C) *6: Acceleration when a weight with a weight of 115 kg and a ground contact area of 9 CrrI' is allowed to fall freely *7: Convergence of the impact acceleration waveform when the above weight falls to a height of 5 cm *8: 2 kg /crn' (constant load), permanent deformation after 24 hours (20°C) [Effects of the Invention] As detailed above, the shock absorbing material of the present invention has a specific foam material and/or a gel material. It is airtightly sealed with a synthetic resin film, is lightweight, has extremely excellent shock absorption performance, and can be used for an extremely long time without permanent deformation. Moreover, it is capable of absorbing impact in an extremely short period of time and has excellent responsiveness to impact. In addition, the impact absorbing material of the present invention has high performance and long life. Yes1: Applicable to a wide range of applications.
1

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing embodiments of the shock absorbing material of the present invention, FIG. 3 is a perspective view showing different embodiments of the shock absorbing material of the present invention, and FIG. A longitudinal sectional view taken along the line -■, and FIGS. 5 and 6 are sectional views showing further different embodiments of the shock absorbing material of the present invention. l... Shock absorbing material, 2... Shock absorbing base material,
3.13...Synthetic resin film. Agent: Patent Attorney Tsuyoshi Shigeno 1st
Figure 2 Figure 3 - Figure 4 Figure 5 1.

Claims (1)

[Claims] (1) Impact resilience at 20℃ is 25% or less, density is 0.0
Foamed material and/or SR that is 5 to 0.9 g/cm^3
A shock-absorbing base material made of a gel-like substance with hardness of 50 degrees or less and impact resilience of 25% or less according to IS is used with a tensile strength of 1.
A shock absorbing material characterized by being airtightly sealed with a synthetic resin film having a tensile strength of 00 kg/cm^2 or more, an elongation at break of 50% or more, and a thickness of 10 to 2,000 μm.