JPS6130846Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a mat for gymnastics, play, home use, and office use that does not slip on the floor, has a good cushioning effect, feels good on the skin, and has an excellent pressure feeling.

Traditionally, foam mats that are placed on the floors of kitchens, melting rooms, etc., are made of polyethylene foam with finely textured surfaces, but due to their slippery nature, there is a risk of falling. It was hot.
Also, as mats for gymnastics, felt alone or a laminate of felt and rubber or plastic foam covered with canvas are often used. Its disadvantages are that it lacks elasticity and shock-absorbing power, is relatively heavy and difficult to handle, and is not long.

Now, in gymnastics floor exercises and exercises using equipment such as vaulting boxes, a considerable amount of dynamic load is applied to the pine when the athlete kicks or lands on the pine, making it easy for the athlete to slip on the floor. If this occurs, it may interfere with the athlete's exercise and pose a risk of falling, so a strict anti-slip ability is required. At the same time, it is not only necessary to have a cushioning effect and feel good on the skin, but also to have a good feeling under pressure. Especially nursery school children,
Matsuto, which is aimed at infants such as kindergarteners and children in the lower grades of elementary school, has been in great demand in recent years from the standpoint of promoting health and physical education. The required properties are that the surface has good texture, elasticity, and cushioning properties to prevent injuries, and is non-slip so that there is no feeling of bottoming out when stepped on.It is also an endless body, so it does not curl when rolled up and stored. First, it has all the characteristics such as the back side adhering to the floor surface and no "slipping" during use. Needless to say, conventional mats have not been able to adequately meet these demands.

This invention not only satisfies the above requirements, but also is relatively light and has high resilience against bending in the thickness direction, so even long rolls do not develop curls and can be laid over a wide range. It can also meet the demand for

This inventive mat will be described in detail below based on drawings showing preferred embodiments. In the drawings, Fig. 1 is a plan view of one embodiment of this inventive mat, Fig. 2 is a bottom view of the same, and Fig. The figures each show a sectional view taken along the line in FIG. 1. In the figure, 1 is a foam made of 1,2-polybutadiene resin alone or a polymer blend containing 1,2-polybutadiene resin as one component, 2 is a polyacrylic fiber cloth, and the foam 1 and the fiber cloth 2 are made of felt or heat-fused. The foam laminate is constructed by coating or other means. 80 to 130 for this foam laminate
Heat embossing is applied from above and below at a temperature in the range of 0.degree.
are provided for each. The shape of the convex portion 3 is shown as a circular bulge in the figure, but the shape is not limited to this, and convex portions of any shape arrangement that provide anti-slip resistance to the sole of the foot when stepping on the foot may be used. Needless to say, it will be adopted. Foam 1 is material 1, 2
- Polybutadiene resin or a polymer blend containing polybutadiene resin as one component is boiled by ultraviolet cross-linking method before foaming - Toluene The gel fraction after 15 hours is 30~
It is partially pre-crosslinked to within a range of 75% and then foamed by a blowing agent decomposition method, etc. The detailed manufacturing method and its physical properties are described in Patent No. 904744, which the applicant has already obtained. Since it is stated in the specification, we will omit the details here, but this foam is non-slip, has good elasticity and elasticity, and is a rubber-like material with good recovery properties and low permanent elongation and compression set. It has excellent behavior, and because it is a partially crosslinked product, it retains thermoplasticity. Therefore, due to this thermoplasticity, the foam 1 softens in the softening temperature range of 80 to 130 degrees Celsius, but does not completely melt, and the recesses 4 on the wires subjected to heat embossing do not melt and harden. Concave portion 4... also other flat portions and convex portion 3...
There is almost no difference in hardness, stretchability, and elasticity. According to the inventor's experiments, in order to maintain the cushion elasticity, treading feeling, and shock absorbing properties of the mat of this invention at a minimum, the thickness should be 4 mm or more, and the foaming ratio should be 3 to 15 times, preferably 5 to 10 times. I realized that it was necessary to be. It is necessary to use a polyacrylic fiber cloth, preferably a modacrylic fiber cloth, as the fiber cloth 2 because the softening temperature range is 80 to 130.
This is because it is possible to follow the embossing by exhibiting good elongation in the warp and weave directions, and after the formation of the protrusions 3 as shown in the figure, there is a considerable amount of elongation until the fiber reaches the breaking point. There is some leeway left. Therefore, the feel of the original fabric does not change at all after thermoforming, and combined with the elasticity of the foam, it maintains an extremely good feel. When laminating the polyacrylic fiber cloth 2 and the foam 1, apply an appropriate adhesive (for example, a two-component solvent-based polyurethane adhesive...not shown in the figure) to the contact surface with the foam 1. For the coated and bonded laminate, the upper mold is a convex mold for forming the convex parts 3, and the lower mold is a simple flat mold or a concave part 4...
A convex mold is used for forming, and a high frequency welder or general heat press equipment is applied. In the case of the former welder, it heats up quickly due to self-heating, so the convex part 3
...the thermal energy involved in the formation becomes concentrated and rapid, and the recesses 5 on the back side of the foam 1...if the corresponding parts remove the thermal pressure, the recesses 4 due to contraction during cooling.
... is expressed spontaneously, and its formation becomes possible even without using a convex shape. When using a general external heat type hot embossing press machine, the heating time is long and the heating is gradual, so it is necessary to use a convex type as the lower mold. What should be noted is that in the compressed part 6 of the foam 1 shown in Fig. 3, where the pressure is concentrated and the wall becomes thin, the foam cells collapse and become solid-like, with elasticity close to that of rubber. Therefore, the mat has good restoring elasticity against bending in the thickness direction, which further prevents curling during winding and storage. It is necessary that the recesses 4 are independent from each other, that is, there is no air flow path between adjacent recesses. This is to provide a suction cup effect to the floor surface when each concave portion 4 is pressed and compressed.
According to experiments, in order to achieve this effect, when the recess 4 is circular as shown in Fig. 2, the diameter must be 5 m/m.
It was found that when the diameter is 7 m/m, the depth of the concave portions 4 needs to be about 2 mm, and as the diameter becomes larger, the depth needs to be increased proportionally.

Since this devised mat has the above-mentioned structure, the suction cup action on the floor surface of the concave portion 4 provided on the back surface of the foam body 1 not only sufficiently prevents the foam body from slipping on the floor surface. The cushioning action based on the elasticity of the body 1, the good texture, and the excellent pressure feeling are fully exhibited, and the convex portion 3...
This has an excellent practical effect of preventing the soles of the feet from slipping, making this mat particularly suitable for gymnastics and children's play. Furthermore, as mentioned above, this devised mat has good restoring elasticity against bending in the thickness direction, so there is no so-called "winding curl" even when long lengths are rolled, making it convenient for construction. Coupled with being lightweight,
It can also meet requests for wide-area installations. In addition to the above-mentioned uses, this invented mat can also be widely used as a home entryway mat, a kitchen mat, a fume mat, and a floor covering mat for factories, offices, etc.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of this mat, FIG. 2 is a bottom view thereof, and FIG. 3 is a sectional view taken along the line of FIG. 1. Explanation of symbols, 1... Foam made of 1,2-polybutadiene resin alone or a polymer blend containing this as one component, 2... Polyacrylic fiber cloth, 3... Convex portion, 4... Concave portion , 5... recess, 6
...Compression part.

Claims (1)

[Claims for Utility Model Registration] 1. The surface of a foam laminate of a foam 1 of a 1,2-polybutadiene resin alone or a polymer blend containing the same as one component and a polyacrylic fiber cloth 2, including the fiber cloth 2. This mat is formed by forming a convex part 3 in a protruding manner on the upper surface of the foam body 1, and recessing recesses 4 which are independent from each other in the back surface of the foam body 1. 2. The mat according to claim 1, wherein the foam 1 has an expansion ratio of 3 to 15 times, preferably 5 to 10 times, and a thickness of 4 mm or more.