JPH04354957A - Golf mat - Google Patents

Abstract

PURPOSE:To improve the service life of a golf mat. CONSTITUTION:A golf mat is composed of a cushion underlay 12 having at least 5mm of the whole thickness (b) including at least 2mm thickness of the surface (a) of a foamed resin layer 11 having rubbery elasticity and an artificial turf 16 with laminated lining resin layers 13 having 0.1-2 of 1-3mm high projections 18 per 1cm<2> on the back and 5mm or less thickness (c) of a resin with rubbery elasticity. Both underlay 12 and artificial turf 16 are not applied to each other, but laid overlapping each other for use. Thus, troubles in part of the artificial turf 16 causing delamination to bulge up on the cushion underlay material 12 and falling into disuse do not take place, differing from the case of conventional products having the cushion underlay material 12 and artificial turf 16 applied to each other.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf mat made of artificial grass using monofilament yarn as a pile.

0002

[Prior Art] A golf mat 25 used for a putter or a teeing ground has a thickness of 10 mm on the back side of an artificial lawn 16.
It is formed by bonding cushioning material 12 such as a foamed resin sheet or felt with a thickness of ~20 mm.

[0003] Strong impact loads act on golf mats in the thickness direction and surface direction when a golf club is swung.

[0004] The cushioning material is bonded together to absorb the impact load and alleviate the reaction force transmitted to the golf club.

[0005]

[Problems to be Solved by the Invention] Since the base of the artificial lawn that holds the piles is formed of threads, it is difficult to expand and contract and is not easily torn.

On the other hand, when the cushion material is a foamed resin sheet, its foam structure is composed of a thin resin film surrounding fine bubbles, and the resin film absorbs the impact load during swing. They rub against each other and easily tear.

[0007] Furthermore, when the cushion material is felt,
Since the fibers constituting the ball are simply entangled with each other, the fibers tend to shift due to the impact load during the swing, causing interlayer peeling.

In particular, on the bonding surface between the artificial grass and the cushioning material, delamination is likely to occur due to the difference in physical properties between the artificial grass 16, which is difficult to expand and contract, and the cushioning material 12, which is deformable and easily expandable. Since the impact load during swing is concentrated on the surface to be bonded to the grass, no matter how strong the adhesive is used, the foam resin film may break or the felt fibers may become misaligned, resulting in damage to the foam resin sheet or felt. Intralayer peeling is likely to occur near the bonding surface, and interlayer peeling between the artificial lawn 16 and the cushioning material 12 is likely to occur.

In that case, the peeled cushion material 12
The surface of the artificial lawn 16 remains flat due to its elastic resilience, but once the warp and weft yarns that make up the base 20 of the artificial lawn 16 are stretched, they contract and do not return to their original state. The artificial grass 16 swells up on top of the cushioning material 12 at the part where it has peeled off, making it no longer usable as a golf mat (FIG. 4).

[0010] Accordingly, an object of the present invention is to improve the service life of golf mats.

[0011]

[Means for Solving the Problems] A golf mat 25 according to the present invention is a cushion underlay having a total thickness b of 5 mm or more, in which a portion of the surface thickness a of at least 2 mm is a foam layer 11 made of a foamed resin having rubber elasticity. material 12 and a protrusion 18 with a height h of 1 to 3 mm on the back surface of 0.1 per cm2.
The artificial lawn 16 is constructed such that the backing layer 13 made of a rubber elastic resin and having a thickness c of 5 mm or less is laminated at a ratio of 2 to 2 pieces, and can be used by simply stacking them on top of each other without pasting them together. .

[0012] "A portion where the surface thickness a is at least 2 mm" refers to a non-foamed resin sheet or a foamed resin sheet that does not have rubber elasticity, although the entire cushion underlay material 12 may be made of foamed resin (Fig. 1). Alternatively, the cushion underlay material 12 can be made by using a sheet with cushioning properties such as felt as the base 21, and laminating the foam layer 11 made of a foam resin with rubber elasticity thereon (FIG. 2). means.

When the base 21 is made of a foamed resin sheet that does not have rubber elasticity, such as polypropylene resin or polyethylene resin, the surface of the polypropylene resin or polyethylene resin formed in the form of a film is cut off to make the surface uneven. A foam layer 11 made of foam resin having rubber elasticity is laminated.

In that case, the thickness a of the foam layer 11 is 5 m.
m or more, the foaming ratio is 3 to 6 times, and the total thickness b of the cushion underlay material is 7 to 15 mm, preferably 10 to 6 mm.
It is better to set it to 15mm.

The backing layer 13 on the back side of the artificial lawn consists of a resin layer 17 made of a low-foamed resin with an expansion ratio of 2 times or less or a non-foamed resin with rubber elasticity and a thickness d of 3 mm or less, and a non-foamed resin with rubber elasticity. It is also possible to have a two-layer or multi-layer laminated structure with a back layer 19 (FIG. 2).

When the thin resin layer 17 is interposed between the back layer 19 having the protrusions 18 and the artificial lawn base 20 in this way, the thin resin layer 17 is interposed between the artificial lawn base 22 and the non-foamed back layer 19 having the protrusions when swinging. Since the applied shear stress is relaxed, delamination between the back layer 19 and the artificial lawn base 20 becomes difficult to occur.

At this point, the thickness d of the low foam resin layer 17 is 3.
If the thickness exceeds 1.0 mm or the foaming ratio exceeds 2 times and the foam becomes fluffy, the artificial lawn base 20 and the resin layer 17 may be separated from each other in the same manner as the conventional product in which a foam sheet is pasted on the back side of the artificial lawn base 20. It becomes easy to peel off, making it difficult to achieve the intended purpose of the present invention.

Therefore, it is necessary to make the expansion ratio of the low foaming resin layer 17 2 times or less and the thickness d 3 mm or less.

In the present invention, the height h of the protrusion 18 is set to 1 to 3.
The reason why it is set to mm is that the protrusion 18 bites into the surface of the cushion underlay material 12 when swinging, so that the surface 22 of the backing layer and the surface 23 of the cushion underlay material are in close contact with each other, making it difficult for them to shift.

[0020] In this way, in order to prevent slippage between them, in the present invention, the surface 23 of the cushion underlay material and the surface 22 of the backing layer are made of a resin having rubber elasticity and a large coefficient of friction. The foam layer 11 is a portion having a depth (a) of at least 2 mm from the surface 23 of the cushion underlay material so that the projections 18 can bite into it.

That is, when the number of protrusions 18 is small or when the height h is less than 1 mm, the cushion underlay material 1
2 becomes insufficient, or conversely, if there are too many of them or their height h exceeds 3 mm, it becomes difficult for the backing layer surface 22 and the cushion underlay material surface 23 to come into contact during swing. This makes it difficult to achieve the intended purpose of the present invention.

For this reason, the height h of the protrusion 18 is 1 to 2.
mm, and the number of protrusions 18 is 0.0 mm per 1 cm2.
It is desirable that 25 to 1 pieces protrude and the thickness is such that the cross-sectional area at the root 14 is 3 to 15 mm2.

Furthermore, since impact stress is concentrated on the tips of the protrusions during swinging, if the protrusions are too angular, the surface of the cushion underlay material 12 is likely to wear out.

[0024] For this reason, the protrusion 18 is preferably formed into a rounded hemispherical shape whose cross section at the tip 15 is arched (FIG. 3).

[0025] As the resin having rubber elasticity, natural or synthetic rubber, polyurethane resin, soft vinyl chloride resin (paste resin), etc. are used.

The artificial lawn 16 is made using a Wilton loom, a tufted machine, a double Raschel warp knitting machine, etc. using plastic monofilament tape yarn or slit yarn as pile yarn.

[0027]

Effects of the Invention In the golf mat 25 according to the present invention, the portion where the depth (thickness a) from the surface is at least 2 mm is the foam layer 11 made of a foamed resin having rubber elasticity, and the total thickness b is 5 mm or more. cushion underlay material 12 and projections 18 with a height h of 1 to 3 mm on the back surface per 1 cm2.
．． The backing layer 13 is made of resin having rubber elasticity and has a ratio of 1 to 2 layers, and the backing layer 13 has a thickness c of 5 mm or less. Since the projections 18 bite into the cushion underlay material 12 while receiving the external force from the golf club during the swing, they are hard to shift like the conventional product which is bonded with an adhesive and integrated.

[0028] Then, the cushion underlay material 12 and the artificial grass 1
Since the artificial grass 16 is used in an overlapping state and not bonded with adhesive, unlike conventional products, a part of the artificial grass 16 peels between layers and swells up on the cushion underlay material 12 when used. This also eliminates the inconvenience of not getting any benefits.

Furthermore, if the pile of the artificial lawn is worn out due to swinging, it is economical to replace only the surface pile fabric (16) without replacing the cushion underlay material 12. lawn 16
It is also advantageous in that the manufacturing process is simplified because no bonding is required.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a golf mat according to the present invention.

FIG. 2 is a sectional view of a golf mat according to the present invention.

FIG. 3 is an enlarged sectional view of protrusions on the backing layer of the golf mat according to the present invention.

FIG. 4 is a sectional view of a conventional golf mat in use.

[Explanation of symbols]

11 Foam layer 12 Underlay material 13 Backing layer 14 Root 15 Tip 16 Artificial lawn 17 Low foam resin layer 18 Protrusion 19 Back layer 20 base 21 Base 22 Surface 23 Surface 25 Golf mat

Claims (3)

[Claims] 1. A cushion underlay material 12 with a total thickness b of 5 mm or more, in which the surface thickness a of at least 2 mm is a foam layer 11 made of a foamed resin having rubber elasticity, and a cushion underlay material 12 with a total thickness b of 5 mm or more, and a back surface with a height h of 1 to 3 mm. Protrusion 18 is 0 per 1cm2
．． A golf mat comprising an artificial grass 16 laminated with a backing layer 13 having a thickness c of 5 mm or less and made of a resin having rubber elasticity and having one or two protruding pieces. 2. A cushion underlay material 12 having a total thickness b of 10 to 15 mm, the portion of which has a surface thickness a of at least 5 mm being a foam layer 11 made of a foamed resin having rubber elasticity;
On the back side, there is a protrusion 18 having a cross-sectional area of the base 14 of 3 to 15 mm2, a height h of 1 to 2 mm, and a tip edge 15 of an arc or cone shape in the longitudinal section.
A golf mat characterized by comprising an artificial lawn 16 laminated with a backing layer 13 made of non-foamed resin that protrudes at a ratio of 25 to 1. [Claim 3] Formed from a foamed resin having rubber elasticity with a foaming ratio of 3 to 6 times and having a thickness b of 7 to 15 mm.
A cushion underlay material 12, a resin layer 17 on the back side made of a low foam resin with an expansion ratio of 2 times or less or a non-foam resin with rubber elasticity and a thickness d of 3 mm or less, and a cross-sectional area of the root 14 of 3 to 15 mm2. The height h is 1 to 3 mm,
A back layer 19 made of a non-foamed resin having rubber elasticity and a back layer 19 made of a non-foamed resin having rubber elasticity and a protrusion 18 having a tip edge 15 in the shape of an arc or a cone in a longitudinal section formed at a ratio of 0.25 to 1 per cm2 are sequentially laminated. A golf mat characterized by comprising a lawn 16.