JP4658367B2 - Artificial grass - Google Patents

Description

[0001]
The present invention, human Koshibajotai, more particularly, to an excellent artificial grass-like body to the light emission efficiency of the fluorescent substance.
[0002]
[Prior art]
In recent years, golf driving ranges have been opened at night, and there are many scenes of practicing at night. However, at night golf courses, it is difficult to see the green from a distant position even if the green is illuminated, and it is difficult to check the position of the hole, so it can be easily seen at night It is requested to do.
[0003]
In addition, there are many places where there are dangers such as night work sites, rivers, roads, etc., and there is an increasing demand for signs that can be clearly seen at night and can attract attention.
[0004]
In order to meet such demands, artificial turf and signs that emit light at night are promising.
As a material that emits light at night, an attempt has been made to disperse a fluorescent substance in a thermoplastic synthetic resin and use it as a thread, rope, net, lawn or the like (Japanese Patent Laid-Open No. 9-1111531).
[0005]
However, when only a fluorescent substance is added, since the emission of the fluorescent substance is weak, it cannot be visually recognized in the daytime, and the label appears to be simply a cloudy substance, and functions as a green lawn or a label. There is a problem that cannot be fulfilled.
[0006]
In order to solve this problem, it is also considered to solve such a defect by adding a pigment having the same color tone together with the fluorescent substance so that the same color can be seen even in the daytime.
[0007]
However, when a pigment is added to a thermoplastic synthetic resin at the same time as a fluorescent light-emitting substance, there is a problem in that the pigment is blocked to block incident ultraviolet light, and the fluorescent light is weakened to conceal the emitted fluorescent light, thereby reducing its function.
[0008]
For this reason, there is a demand for the development of signs and the like that look the same in the daytime and at night, have strong fluorescence, and can be clearly observed at nighttime.
[0009]
[Problems to be solved by the invention]
The present invention, at night, the sewing machine in the same manner regardless of the day, and, but also provides a clearly that obtained recognize artificial turf shaped body at night strong emission of fluorescence.
[0010]
[Means for Solving the Problems]
The present invention has been made result of intensive studies to solve the above problems, the thermoplastic synthetic resin strip from a tape-like body of the multi-layer obtained by uniaxially stretching, emit fluorescence in the outer layer and luminescent substances that can not be recognized visually the color development was dispersed under sunlight, a fluorescent luminescent tape-like body color pigment in emission color the same lineage ing dispersed in the light-emitting substance in the inner layer An artificial turf-like body is provided which is formed by planting on a base fabric to form a turf-like body .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The fluorescent light-emitting tape-like material of the present invention is a multilayered thermoplastic synthetic resin band in which a light-emitting substance that emits fluorescence is dispersed in an outer layer, and in the inner layer, a pigment of the same type is dispersed in the emission color of the light-emitting substance. Obtained by uniaxially stretching the body.
[0014]
That is, as shown in FIG. 1, the fluorescent light-emitting tape-like body 1 has outer layers 3a and 3b laminated on both surfaces of an inner layer 2 serving as a core material, and a light-emitting substance that emits fluorescence is added and dispersed in the outer layer. A pigment of the same type as the luminescent color of the luminescent material is added and dispersed in.
[0015]
As the synthetic resin for forming the inner layer 2, a resin having a large stretching effect, generally a crystalline resin is used. Polyolefins such as high-density polyethylene, polypropylene, and ethylene / propylene block copolymers, polyethylene terephthalate, polybutylene terephthalate, etc. Polyester, nylon 6, polyamide of nylon 66, or the like can be used. Among them, as the synthetic resin for forming the outer layers 3a and 3b, which are preferably polyolefins such as polyethylene and polypropylene in view of processability and economy, it is possible to use high-pressure low-density polyethylene and linear low-density polyethylene in addition to the above synthetic resins. it can.
[0016]
There is no restriction | limiting in particular as a luminescent substance which light-emits the fluorescence added and disperse | distributed to outer layer 3a, 3b, According to the objective, per se well-known fluorescent luminescent substance can be used, for example, calcium halophosphate,: Sb: Mn, Zn ₂ SiO ₄ : Mn, ZnCdS: Ag, Zn ₃ (PO ₄ ) ₂ : Mn, ZnS: Pb, SrS: Sm: Eu: Bi, and other organic fluorescent pigments can be used.
[0017]
Among these, BaMg ₂ Al ₁₀ O ₂₇ : Eu is preferably used for blue, BaMg ₂ Al ₁₀ O ₂₇ : EuMn is used for green, and Y ₂ O ₂ S: Eu is used for red. The addition amount of these luminescent substances is 0.5 to 10.0% by weight, preferably about 1.0 to 8.0% by weight.
[0018]
The pigments blended in the inner layer 2 include chrome lead, chrome vermilion, zinc yellow, barium yellow, bitumen, silver vermilion, lithopone, bengara, iron black, titanium yellow, cobalt blue, ultramarine, metal powder, other phthalocyanine series, quinacridone Can be used organic pigments such as barium sulfate, calcium sulfate, zinc oxide, titanium white, calcium carbonate, magnesium carbonate, calcium silicate, clay, mica etc. can be used with these pigments can do.
[0019]
These pigments are mixed and blended so as to have the same color tone as the fluorescent color tone emitted from the luminescent material.
[0020]
In the present invention, the color tone of the same system means a color tone that gives a similar impression, and high-precision identity is not required.
[0021]
The pigment is blended in the inner layers of the outer layers 3a and 3b blended with a luminescent substance that emits fluorescence, preferably in the inner layer 2 adjacent to the layer blended with the luminescent substance. However, interposing a transparent synthetic resin layer between the inner layer 2 and the outer layers 3a and 3b is not excluded.
[0022]
The thermoplastic synthetic resin forming the inner layer 2 and the outer layer 3 can be blended with various additives as required, for example, an organic phosphorus type such as a phenol type, an organic phosphite type, a phosnite, a thioether type, etc. Antioxidants such as nonionic, cationic, and anionic antistatic agents; dispersants such as bisamides, waxes, and organometallic salts; chlorine supplements such as carboxylates of alkaline earth metal salts; Amide-type, wax-type, organometallic salt-type, ester-type lubricants; hydrazine-type, amine-acid-type metal deactivators; bromine-containing organic-type, phosphate-type, antimony trioxide, magnesium hydroxide, red phosphorus, etc. Flame retardants: Inorganic and organic antibacterial agents such as metal ions.
[0023]
The resin composition for forming the inner layer 2 and the outer layers 3a and 3b is appropriately blended with these components as necessary, and a Henschel mixer, a super mixer, a V blender, a tumbler mixer, a ribbon mixer, a Banbury mixer, a kneader blender, After mixing or melt-kneading in a normal mixing or kneading machine such as a single-screw or twin-screw extruder, the film is formed into a film.
[0024]
Lamination of the inner layer 2 and the outer layers 3a, 3b can be performed by molding a film forming the inner layer 2 and a film forming the outer layers 3a, 3b, respectively, and then pressing them with a hot roll. After the film is formed into a film, it can be laminated by melt-extruding another composition on the film. Furthermore, it can also laminate | stack by coextruding the resin composition which forms the inner layer 2, and the resin composition which forms the outer layers 3a and 3b.
[0025]
The formed film is stretched in the longitudinal direction using a stretching apparatus after slitting to a predetermined width or before slitting.
[0026]
In the present invention, depending on the purpose, as shown in FIG. 2, the protective layers 4a and 4b can be formed on the outer sides of the outer layers 3a and 3b in which a luminescent substance that emits fluorescence is blended, As shown in FIG. 3, the reinforcing layer 5 can be interposed at the center of the inner layer 2.
[0027]
The protective layers 4a and 4b and the reinforcing layer 5 can be made of the same synthetic resin as the inner layer 2 and the outer layers 3a and 3b, and the addition of the light emitting substance or pigment is omitted or the blending ratio is reduced. .
[0028]
In the present invention, the addition of the luminescent substance to the inner layer 2 is not excluded, and a part of the luminescent substance can be added to the inner layer 2, but 80% by weight or more of the luminescent substance is added to the outer layers 3a and 3b. It is desirable to add. The same applies to the pigment, and it is desirable to add 80% by weight or more of the pigment to the inner layer 2.
[0029]
The laminated thermoplastic synthetic resin film is uniaxially stretched before being slit to a predetermined width or after being slit. The stretching method can be performed by stretching with a hot roll, stretching with a hot plate, stretching with a roll in a hot stove, or the like. The draw ratio is 3 to 12 times, preferably about 5 to 10 times.
[0030]
The stretched laminated film is made into a fluorescent light-emitting tape-like body 1 by slitting as necessary.
[0031]
The fluorescent light-emitting tape-like body 1 can be used as a label or the like as it is. However, in general, the fluorescent light-emitting tape-like body 1 is used after being processed. The processing of the tape-like body 1 is used as a rope, a braid, a net, a woven fabric, and other cloth-like bodies by forming a rope, a braid, a knitted net, and a weave. In the present invention, the cloth-like body includes a vegetated pile yarn and includes a carpet-like body.
[0032]
Further, the fluorescent light-emitting tape-like body 1 can be used as the artificial turf 10. When the artificial turf 10 is formed, as shown in FIG. 4, the fluorescent light-emitting tape-like body 1 is tufted on the base cloth 8, and the backing yarn 9 such as SBR is applied to the back surface to fix the pile yarn. Can be artificial grass. The tufted pile yarn can be used as a loop pile as it is, but the upper end of the loop pile can be cut into a cut pile.
[0033]
The fluorescent light-emitting tape-like body 1, rope, braid, net, woven fabric, and other cloth-like bodies obtained in this way can be used as signs such as partitioning off restricted areas and warning indications for dangerous places. The artificial turf can be used as a golf driving range green used at night, a line display of a ball field, or other zone display. These signs and artificial turf can be projected clearly at night without damaging the environment by irradiating with ultraviolet rays, black light, or the like.
[0034]
【The invention's effect】
The present invention can provide a fluorescent light-emitting tape-like body, a marker, and an artificial turf-like body that can be observed in the same way at night and in the daytime, and has strong fluorescence and can be clearly recognized at night. Obtainable.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of the fluorescent luminous tape of the present invention. FIG. 2 is a longitudinal sectional view showing another example of the fluorescent luminous tape of the present invention. Fig. 4 is a longitudinal sectional view showing still another example of the object. Fig. 4 is a longitudinal sectional view showing an example of the artificial turf.
1: Synthetic resin sheet 2: Inner layer 3: Outer layer 4: Protective layer 5: Reinforcing layer

Claims (5)

It consists of a multilayer tape-like body obtained by uniaxially stretching a strip made of thermoplastic synthetic resin,
The tape-like body emits fluorescent light in the outer layer, and a luminescent material in which color development cannot be visually recognized under sunlight is dispersed, and a pigment having the same color tone as the luminescent color of the luminescent material is dispersed in the inner layer. A fluorescent light-emitting tape-shaped body,
An artificial turf-like body obtained by planting the fluorescent light-emitting tape-like body on a base fabric to form a turf-like body. Fluorescent light emitting tape
The artificial turf-like body according to claim 1 , wherein the body is formed by laminating a transparent thermoplastic synthetic resin on an outer surface of the outer layer . The artificial turf-like body according to claim 1 or 2, wherein the fluorescent light-emitting tape-like body is a cut pile obtained by cutting an upper end portion of a loop-like pile. 4. The fluorescent light emitting tape-like body, wherein the outer layer is laminated on both surfaces of the inner layer, and a light emitting substance that emits fluorescence is dispersed in both outer layers. The artificial turf-like body according to crab. 5. The artificial turf-like shape according to claim 4, wherein the fluorescent light-emitting tape-like body is formed by laminating the outer layers directly or only with a transparent synthetic resin layer on the inner layer made of a single layer. body.

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