JP2000303257A - Yarns for flame-retardant artificial lawn and flame- retardant artificial lawn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain yarns for artificial lawn that has excellent yarn properties, for example, strength, elongation and the like and can manifest good flame retardancy by using polyamide resin and a melamine flame retardant at a specific ratio. SOLUTION: The objective yarn for artificial lawn comprises (A) 99.9-97.0 pts.wt. of a polyamide resin, for example, nylon 6 or nylon 66, and (B) 0.1-3.0 pts.wt. of a melamine flame retardant (preferably melamine cyanurate, melamine phosphate, melamine polyphosphate or melamine sulfate having an average particle size of 0.1-10.0 μm). In many cases, the artificial lawn yarn is colored in green, but it is not limited thereto. As a green coloration pigment, are cite brilliant green PTMA toner and the like and as a yellowish brown pigment, are cited fast yellow 10G and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flameproof artificial grass yarn and a flameproof artificial grass made of a polyamide resin containing a melamine flame retardant.

[0002]

2. Description of the Related Art In recent years, artificial turf has been used for sports applications such as baseball fields, tennis courts, rugby fields, soccer fields, gate ball fields, golf practice mats, poolside mats, parks, hospitals, schools and kindergartens. It is widely used in public spaces, home gardens, terraces and verandas. Among these diverse uses are skyscrapers, underground malls, hotels, hospitals, kindergartens, welfare facilities, churches,
When artificial turf is used in fire-prevention objects specified by the Fire Service Law or Cabinet Order, such as exhibition halls and amusement arcades, the turf must have flameproofing performance that exceeds the standards specified by the Cabinet Order.

[0003] As a material for artificial turf, polyamide yarns such as nylon 6 and nylon 66 are usually used in many cases because of their excellent mechanical strength, abrasion resistance, gloss, feel, and dyeability. ing. However, it is difficult for artificial turf using these polyamide yarns as they are to achieve flameproofing performance exceeding the standards specified by a Cabinet Order.

[0004] Therefore, a method has been proposed in which a metal hydroxide such as aluminum hydroxide or magnesium hydroxide is added to the backing layer constituting the artificial turf to impart flameproofing performance. For example, Japanese Patent Publication No. 51-44239 discloses that the fibers constituting the pile portion are made of polyamide fibers or a mixed fiber of polyamide fibers and other fibers, and the backing layer of the base fabric portion contains aluminum hydroxide and a phosphorus compound. And a fire-retardant pile woven fabric.
Japanese Utility Model Laid-Open Publication No. 6-83788 discloses a rug such as an artificial turf in which a backing layer is formed from a material obtained by mixing aqueous dihydrate gypsum with an aqueous resin emulsion. But,
In these methods, since the pile on the surface is essentially burned, there is a problem that sufficient flameproofing performance cannot be obtained unless the pile length and the pile density are appropriate. Also,
There is also a problem that it is difficult to adhere when attaching a water-permeable mesh or the like to the backing layer on the back surface.

[0005] On the other hand, a number of methods for imparting flame resistance to the pile portion itself have been proposed in the past, but most of them are methods of attaching a flame retardant to the pile portion. However, in this method, there is a problem in the bonding property between the pile and the flame retardant, and in particular, when the pile is made of synthetic fiber such as polyamide fiber, it is not possible to permanently attach the flame retardant. Have difficulty. Various methods have been proposed to solve this problem, but they have the disadvantage that the texture of the pile portion is impaired, and the pile portion is peeled off by friction.

On the other hand, in order to impart flame retardancy to polyamide yarns such as nylon 6 and nylon 66, it is a common method to add a flame retardant. However, with the conventionally proposed methods, there are observed phenomena such as decomposition of the polyamide during melt-kneading of the polyamide resin and the flame retardant, and elution of the flame retardant on the yarn surface during post-processing and use of the polyamide yarn. At present, a material that can be used practically has not been obtained.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, exhibits good flame resistance, and can be used in places specified by the Fire Service Law and Cabinet Order. Another object of the present invention is to provide a flameproof artificial turf.

[0008]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention has the following (1) to (4). (1) A flameproof artificial grass yarn comprising 99.9 to 97.0 parts by weight of a polyamide resin and 0.1 to 3.0 parts by weight of a melamine-based flame retardant. (2) The flameproof artificial turf yarn according to (1), wherein the melamine-based flame retardant is at least one selected from the group consisting of melamine cyanurate, melamine phosphate, melamine polyphosphate and melamine sulfate. (3) The flameproof artificial turf yarn according to the above (1) or (2), wherein the melamine-based flame retardant has an average particle size of 0.1 to 10.0 μm. (4) A flame-resistant artificial turf using the yarn for flame-resistant artificial turf described in the above (1) to (3).

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The polyamide resin constituting the flameproof artificial turf yarn of the present invention includes polycaproamide (nylon 6),
Polytetramethylene adipamide (nylon 46), polyhexamethylene adipamide (nylon 66), polyhexamethylene sebacamide (nylon 610), polyhexamethylene dodecamide (nylon 612), polyundecamethylene adipamide (Nylon 116), polyundecamide (nylon 11), polydodecamide (nylon 12), polybis (4-aminocyclohexyl) methane dodecamide, (nylon PACM12), polybis (3-methyl-4-aminocyclohexyl) methane dodecamide (nylon dimethyl) PACM1
2), polymethaxylylene adipamide (nylon MXD
6), polyundecamethylene terephthalamide (nylon 11T), homopolymer or copolymer such as polyundecamethylene hexahydroterephthalamide [nylon 11T (H)], or a mixture thereof. Nylon 6 homopolymer, nylon 6 copolymer, nylon 66 homopolymer and nylon 66 copolymer are preferred.
Homopolymers and nylon 66 homopolymers are particularly preferred.

[0010] The relative viscosity of the polyamide resin is
It is preferable that the value measured at a temperature of 25 ° C. and a concentration of 1 g / dl using 96% by weight sulfuric acid is in the range of 1.5 to 6.0,
More preferably in the range of 2.5 to 5.0, and 3.0 to 5.0
It is particularly preferable that the ratio is within the range. If the relative viscosity is less than 1.5, the mechanical strength of the yarn for artificial turf decreases. On the other hand, when the relative viscosity exceeds 6.0, the spinning property is rapidly reduced, which causes trouble in the processing step.

The flame retardant constituting the flame-retardant artificial turf yarn of the present invention includes a melamine-based flame retardant, which is obtained by reacting a strong flame-retardant acid with melamine. Among them, melamine cyanurate, melamine phosphate, melamine polyphosphate, and melamine sulfate are preferable, and these can be used alone or in combination.

Melamine cyanurate is an equimolar reaction product of melamine and cyanuric acid. For example, an aqueous solution of cyanuric acid and an aqueous solution of melamine are mixed, and the precipitate formed under stirring at a temperature of 90 to 100 ° C. is filtered. This is a white powder obtained by the following method. Specifically, "MC640" manufactured by Nissan Chemical Co., Ltd. can be suitably used.

Melamine phosphate is an equimolar reaction product of melamine and phosphoric acid, and is, for example, a white powder obtained by mixing and heating an aqueous solution of phosphoric acid and an aqueous solution of melamine. Specifically, "P-7202" manufactured by Sanwa Chemical Co., Ltd. can be suitably used.

Melamine polyphosphate is an equimolar reaction product of melamine and polyphosphoric acid, and is, for example, a white powder obtained by mixing and heating an aqueous solution of polyphosphoric acid and an aqueous solution of melamine. Specifically, “PMP-100” manufactured by Nissan Chemical Co., Ltd. and “MPP-A” manufactured by Sanwa Chemical Co., Ltd. can be suitably used.

Melamine sulfate is a 2: 1 mixture of melamine and sulfuric acid.
Molar reactant, for example, a white powder obtained by mixing and heating an aqueous solution of sulfuric acid and an aqueous solution of melamine. Specifically, "Apinon-901" manufactured by Sanwa Chemical Co., Ltd. can be suitably used.

The mixing ratio of the polyamide resin and the melamine-based flame retardant must be in the range of 99.9: 0.1 to 97.0: 3.0, preferably in the range of 99.5: 0.5 to 98.0: 2.0. . Melamine-based flame retardant compounded at 0.1
If the amount is less than the percentage by weight, a yarn for artificial turf having sufficient flameproofness cannot be obtained. On the other hand, when the blending amount of the melamine-based flame retardant exceeds 3.0% by weight, yarn breakage occurs during spinning or drawing, operability is deteriorated, and yarn quality such as high elongation of yarn is deteriorated.

In order to prevent problems such as abrasion of the guide and passability in the process from spinning to winding, the melamine-based flame retardant has an average particle diameter of 0.1.
It is preferable to use one having a thickness of 1.0 to 5.
It is more preferable to use one having 0 μm. If the average particle size exceeds 10 μm, clogging of the filter during spinning increases, and operability deteriorates. On the other hand, the average particle size is
If the diameter is smaller than 0.1 μm, the specific surface area increases, so that it becomes easy to aggregate during kneading with the polyamide resin,
It causes clogging of the filter during spinning.

The melamine-based flame retardant may be used by directly mixing it with the resin pellets.
It may be used in the form of a master pellet containing 50% by weight.

The artificial turf yarn of the present invention is often colored green, but is not limited to this. As the color pigment, a general synthetic resin color pigment can be used.

For example, brilliant green PTMA toner, diamond green PTMA toner, phthalocyanine green, phthalocyanine green (yellow mouth) as a green pigment, Fast Yellow 10G, Disazo Yellow AAA, Disazo Yellow AAMX, Disazo Yellow AAOT, Yellow Oxide as a yellow brown pigment Iron, disazo yellow HR, gold-containing azo yellow, dinitroaniline orange, disazo orange PMP as orange pigment, dianisidine orange, toluidine red, chlorinated para red, brilliant fast scarlet, pyrazolone red as red pigment
B, Barium Red 2B, Calcium Red 2B, Barium Risole Red, Lake Red C, Brilliant Carmine 6B, Pigment Scarlet 3B Lake, Rhodamine 6G
PTMA toner, Bengala, naphthol red FGR, quinacridone magenta, quinacridone red, rhodamine B as purple pigment PTMA toner, dioxazine biored, blue pigment as Victoria Pure Blue PTMA toner, phthalocyanine blue (α type), phthalocyanine blue (β type ), Alkaline blue toner, navy blue, ultramarine,
Examples of white pigments include calcium carbonate, barium sulfate, zinc carbonate, titanium dioxide, magnesium carbonate, talc, and black pigments such as carbon black.

The mixing ratio of the color pigment is 0.1 to 10 parts by weight based on 100 parts by weight of the total of the polyamide resin and the melamine-based flame retardant.
It is preferable to mix parts by weight. If the compounding ratio of the coloring pigment is less than 0.1 part by weight, it becomes difficult to develop the required color tone. On the other hand, if the compounding ratio exceeds 10 parts by weight, the ratio of the polyamide resin is reduced, and a yarn for artificial grass having excellent mechanical strength cannot be obtained. The coloring pigment may be used by directly mixing it with the resin pellets.
It may be used in the form of master pellets containing up to 50% by weight.

Further, as long as the properties (flame resistance) of the present invention are not impaired, antistatic agents, deodorants, anti-mite agents, matting agents, weathering agents, heat stabilizers, antioxidants, antibacterial agents Additives such as agents and plasticizers can be included in the artificial turf yarn.

The flameproof artificial turf yarn of the present invention may be multifilament or monofilament, and has a single-filament fineness.
50 to 1500 d. The cross-sectional shape of the artificial turf yarn may be any of a round shape, a flat shape, and a hollow shape.

When producing the yarn for flame-resistant artificial turf, the yarn can be produced using the apparatus used for the conventional yarn production of polyamide resin-based yarn as it is. And a draw-drawing apparatus. For example, it can be obtained by supplying a melamine-based flame retardant as a raw material to a usual melt-extrusion spinning apparatus, spinning, and, if necessary, stretching and heat-setting, followed by twisting.

The flameproof artificial turf of the present invention is obtained by twisting and crimping the flameproof artificial turf yarn produced by the above-described method, and tufting (punching) it into a base cloth as a pile (turf material). Next, a backing (lining) is performed to fix the pile and the base cloth. At this time, a woven fabric, a knitted fabric, a nonwoven fabric, or the like is used as the base fabric, and a woven fabric made of polypropylene or polyethylene terephthalate is preferable. As the backing substrate, styrene-butadiene latex (SBR) or nitrile-butadiene latex (NBR)
And synthetic resins such as polyacrylates and polyvinyl chloride. Further, a flame retardant such as aluminum hydroxide or magnesium hydroxide may be added to the backing material.

[0026]

Next, the present invention will be described specifically with reference to examples. In addition, the measurement of the characteristic value in an Example and a comparative example was performed as follows. (a) Relative viscosity The relative viscosity was measured at a concentration of 1 g / dl and a temperature of 25 ° C. using 96% sulfuric acid as a solvent. (b) Average particle size SK LASER: LMS- laser diffraction particle size analyzer manufactured by SEISHIN
The measurement was performed using water as a dispersion medium. (c) High elongation Using a Shimadzu Autograph AGS-50D, sample length 25c
m, 1/30 g of fineness (d) under conditions of 25 cm / min pulling speed
Was measured with an initial load of. (d) Flameproofing performance It was evaluated by the 45-degree air mix burner method described in Article 4-3 of the Fire Service Law Enforcement Regulations. Regarding the artificial turf yarn, a sample knitted in a cylindrical shape with a circular knitting machine made by Maruzen (MR-1: 96 needles, kettle diameter 5 inches) was evaluated as a sample.
Regarding the artificial turf, the vertical direction of the tuft direction and the horizontal direction perpendicular thereto were evaluated.

Example 1 Nylon 6 resin having a relative viscosity of 3.5 ("A1030B" manufactured by Unitika Ltd.)
RT)) 98.0 parts by weight, melamine cyanurate as a melamine-based flame retardant (“MC640” manufactured by Nissan Chemical Co., Ltd.) 2.0 parts by weight, copper iodide 0.03 parts by weight as a weathering agent, and a green pigment as a coloring pigment Use pellets "PAM (F) 2946 Green (UI)".) Using 1.8 parts by weight, melt spinning, drawing and heat setting using a normal artificial grass die and take-off drawing device to obtain 2700 denier A / 6 filament (450 denier single yarn) multifilament (flameproof artificial turf yarn) was obtained. At this time, an extruder having an inner diameter of 40 mm was used, and the resin temperature was set to 250 ° C. Next, using this flame-resistant artificial turf yarn as a turf material, tufting was performed on a polypropylene woven fabric (Koizumi hemp company "Polybag") base fabric, and backing was performed with styrene-butadiene-based latex (SBR). Flameproof artificial turf.

Examples 1 and 2 and Comparative Examples 1 and 2 Example 1 was repeated except that the amounts of the nylon 6 resin having a relative viscosity of 3.5 and melamine cyanurate were changed as shown in Table 1.
In the same manner as described above, a flameproof artificial turf yarn and a flameproof artificial turf were obtained.

Example 4 A nylon 66 resin having a relative viscosity of 2.7 ("Zytel 101L" manufactured by DuPont) was used instead of the nylon 6 resin having a relative viscosity of 3.5, and the resin temperature in the extruder was changed to 270 ° C.
In the same manner as in Example 1, a flameproof artificial grass yarn and a flameproof artificial grass were obtained.

Examples 5 to 6 and Comparative Examples 3 to 4 Example 4 was repeated except that the blending amounts of nylon 66 resin having a relative viscosity of 2.7 and melamine cyanurate were changed as shown in Table 1.
In the same manner as described above, a flameproof artificial turf yarn and a flameproof artificial turf were obtained.

Examples 7-9 Except that the melamine-based flame retardant was changed as shown in Table 1,
In the same manner as in Example 1, a flameproof artificial grass yarn and a flameproof artificial grass were obtained. As melamine phosphate, `` P-7202 '' manufactured by Sanwa Chemical Co., Ltd., as melamine polyphosphate, `` PMP-100 '' manufactured by Nissan Chemical Co., Ltd., and as melamine sulfate, `` Apinon-901 '' manufactured by Sanwa Chemical Co., Ltd. was used. .

Examples 10 to 11 Flameproof artificial turf yarns and flameproof artificial turf were obtained in the same manner as in Example 1 except that the average particle size of melamine cyanurate was changed as shown in Table 1. Was.

Example 12 A flame-resistant artificial turf was prepared in the same manner as in Example 1 except that a nylon 6 resin having a relative viscosity of 3.1 ("A1030BRF" manufactured by Unitika) was used instead of the nylon 6 resin having a relative viscosity of 3.5. Yarn and flameproof artificial turf were obtained.

Example 13 The procedure of Example 1 was repeated except that a nylon 6 resin having a relative viscosity of 5.0 ("A1050" manufactured by Unitika) was used instead of the nylon 6 resin having a relative viscosity of 3.5. Yarn and flameproof artificial turf were obtained.

Examples 14 to 17 In the same manner as in Example 1 except that a coloring pigment as shown in Table 1 was used instead of phthalocyanine green, a yarn for flameproof artificial turf and a flameproof artificial turf were prepared. Obtained. In addition, as a white pigment, master pellet “MA
T-NC20 '', a master pellet `` PAM (F) 10545 Brown (UI) '' manufactured by Dainichi Seika as a yellow-brown pigment, and a master pellet `` PAM (F) 10087 Blue manufactured by Dainichi Seika as a blue pigment
(UI) ", and a master pellet" PAM (F) 129 Yellow (UI) "manufactured by Dainichi Seika Co., Ltd. was used as the orange pigment.

The compounding ratios in Examples 1 to 17 and Comparative Examples 1 to 4 and characteristic values (strength, elongation,
Table 1 summarizes the evaluation results of the characteristic values (flameproof performance) of the flameproof artificial turf.

[0037]

[Table 1]

As is clear from Table 1, Examples 1 to 17
The yarn for flame-retardant artificial turf obtained in the above was excellent in the thread property of strong elongation and the flame-retardant performance. Moreover, the flameproof artificial turf had sufficient flameproof performance.

On the other hand, the comparative example has the following problem. In Comparative Examples 1 and 3, since no melamine-based flame retardant was blended, the artificial grass yarn and artificial grass were:
The ignited flame was not extinguished, the carbonization length and the afterflame time could not be measured, and the flame did not have flameproofing performance. Comparative Example 2,
In No. 4, since the content of melamine cyanurate, which is a melamine-based flame retardant, was too large, yarn breakage occurred during spinning and drawing, resulting in poor operability, and the resulting artificial turf yarn had high elongation yarn quality. The performance was low.

[0040]

According to the present invention, it is possible to obtain a yarn for artificial turf having excellent yarn properties such as high elongation and exhibiting good flame resistance. The artificial turf using the yarn for artificial turf as a pile can be sufficiently used for applications requiring flameproofing, such as a place specified by the Fire Service Law or a Cabinet Order.

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Claims (4)

[Claims] 1. A flameproof artificial turf yarn comprising 99.9 to 97.0 parts by weight of a polyamide resin and 0.1 to 3.0 parts by weight of a melamine-based flame retardant. 2. The flame-resistant artificial turf yarn according to claim 1, wherein the melamine-based flame retardant is at least one selected from the group consisting of melamine cyanurate, melamine phosphate, melamine polyphosphate and melamine sulfate. 3. The melamine-based flame retardant has an average particle size of 0.1-1.
3. The flame-resistant artificial turf yarn according to claim 1, which is 0.0 μm. 4. A flameproof artificial turf using the yarn for flameproof artificial turf according to claim 1.