JPS62112803A - Antistatic artificial turf - 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 <Industrial Application Field> The present invention relates to artificial turf having excellent antistatic performance.

<Prior Art> Artificial turf made of synthetic resin is being used more and more sparingly both indoors and outdoors due to its good appearance, functionality, ease of maintenance, and durability. However, synthetic resins are originally insulators, and artificial turf made of synthetic resins has become a problem in that it causes damage to the human body due to static electricity. In order to prevent this electrostatic damage, methods of coating or adding antistatic agents to artificial turf made of synthetic resin, or adding and adding carbon black, metal powder, etc., are being considered.

<Problems to be solved by the invention> The method of applying or adding an antistatic agent to artificial turf deteriorates the antistatic performance because the antistatic agent evaporates over time, especially when used outdoors. There were problems with long-term sustainability.

In addition, the method of adding and blending carbon black, metal powder, etc. has problems such as not being able to color the product to a desired color because the color is determined by the conductive agent used, and the conuts being damaged.

Means for Solving the Problems> In view of the current situation, the present inventors have developed a synthetic resin with fine particle silicic acid or silicate and a specific organic The present invention was achieved by discovering that by blending a compound as an antistatic agent, it is possible to obtain artificial turf made of a synthetic resin that has volume conductivity and has low evaporation of the antistatic agent and excellent durability. be.

That is, the present invention relates to artificial turf provided with a novel antistatic function, and specifically relates to (9) Synthetic trees! 1198.・8-40% by weight (average 1
Fine particle silicic acid or silicate having a specific surface area of 0 to 400 m"/g 1 to 40% by weight (C) polyethylene oxide compound, polypropylene oxide compound,
and a compound of at least ljJ selected from the group consisting of organic electrolytes having a salt structure.
This invention relates to artificial turf with antistatic properties consisting of %.

Artificial turf made of such a synthetic resin composition has not only surface conductivity but also volume conductivity, has a volume resistivity of 10 Ωa or less, and has sufficient antistatic performance.

The feature of the present invention is that by combining components (■) and (Q), which do not provide satisfactory volume conductivity even if they are blended alone into a synthetic resin, not only surface conductivity but also surface conductivity can be achieved.
It also exhibits volume conductivity, and since component 0 is supported by component This means that the durability is improved.Moreover, since component (1) and component (C) are colorless to light in color, the resulting composition can be colored in any desired color.

The present invention relates to artificial turf that has volumetric conductivity and has antistatic properties that are provided by applying or adding antistatic agents, which have been proposed in various ways in the past because of their excellent stability over time. It is clearly distinguishable, and has the advantage of being able to be colored to your preference, which is completely different from methods that add carbon black, gold, etc. at intervals.
1! The present invention will be described in detail below.

The synthetic resin used in the present invention is not particularly limited, but examples include polyethylene, EVA4g [1, polypropylene, polystyrene, ABS wood QI, AS resin, methacrylate]
Tree! Fingers, polyamide, polycarbonate, polyester/
I/i fingers, vinyl chloride resin, epoxy resin, phenol resin, etc. can be mentioned.

The fine particle silicic acid or silicate used in the present invention may be produced by any method such as a dry method or a wet method, but
It is necessary that the specific surface area is 10 to 400 m"f/.The specific surface area is not equal to 10 m2/Q,
If the specific surface area exceeds 400 m2/f, it is not preferable because a satisfactory volume conductivity cannot be obtained.

Polyethylene oxide compound used in the present invention,
Examples of polypropylene oxide compounds include polyethylene glycol, polypropylene glycol, holoxyethylene-polyoxypropylene copolymer, polyoxyethylene alkyl ether, holoxyethylene alkyl phenyl ether, polyethylene glyco-/I/fatty acid ester, etc. Examples of organic electrolytes having a salt structure include potassium acetate, sodium laurate, etc., sulfate salts such as sodium alkyl sulfate, sodium polyoxyethylene alkyl ether sulfate,
Sulfonates such as sodium alkyl sulfonate, sodium alkylbenzene sulfonate, sodium alkylnaphthalene sulfonate, sodium cyanosulfosuccinate, phosphate ester salts such as sodium alkyl phosphate, sodium polyoxyethylene alkyl ether sulfate, Tertiary amine salt, quaternary
Examples include amine salts such as grade ammonium salts. Moreover, these compounds can be used in combination as necessary.

Ingredients (when the average is less than 1%, body bond resistance appears and K<
Component (2) is preferably in the range of 1 to 40% by weight, since if it exceeds 40% by weight, the inherent mechanical properties of the synthetic resin will be impaired. In addition, if component 0 is less than 0.2% by weight, it is difficult to develop conductivity, and if it is more than 20% by weight, the molded product becomes sticky or disadvantageous in terms of cost.
．． It is preferably in the range of 2 to 2O7lt%.

Any suitable mixing or cross-mixing method can be used to blend the components (uniformly or component 0) into the synthetic resin. I can give it to you.

Methods for adding and blending component (C) include ■ Adding it alone, ■ Adding it as a solution, and ■ Adding the component (by pre-adhering it evenly). Components (C) and (B) ,
(C) Can be appropriately selected depending on the properties of each component.

The artificial turf of the present invention may contain various additives such as antioxidants, ultraviolet absorbers, colorants, fillers, etc., as necessary, in addition to the above (c), 0 and 0 components. According to the method of the present invention, after the various components are blended or kneaded, various molding methods such as extrusion molding, injection molding, press molding, etc. can be applied to form artificial turf.

When forming artificial turf, 7 tons are prepared for artificial operation.
iiWllu composition alone may be used, or 1i
1 [1] Any method may be adopted in which a master batch of the composition is made and blended into a molding material for artificial turf.

<Effects of the Invention> The artificial turf obtained by the method of the present invention exhibits only a slight decrease in antistatic performance even when used indoors or outdoors for a long period of time, and there is no practical problem in terms of its stability over time. It is excellent.

Furthermore, since the original color tone of the synthetic resin is not impaired, it has the advantage that it can be colored to any desired color.

Example 2 The present invention will be described below with reference to Examples, but these are merely illustrative and the present invention is not limited thereto.

The measurement of the electrostatic voltage in the examples was carried out using an electric meter "Stanaron-M" manufactured by Anato Shokin.

Q = 5 wt %), fine particle silicic acid 15 w t % with a specific surface area of 200 m27I, polyethylene glycol) V (
Molecule k 200 ) 5 wt % and 2 wt % of T'Hensensulfonic acid salt p' were kneaded and blended in a kneader at a temperature of 150°C, and an artificial turf sample was formed using a press molding method. The charged voltage of the artificial turf sample was less than G, 5 kV.

Example 2 EVA tree 11i (Ml = 6y/10 min, VA containing 'Bl
l = 5 wt%) to the ratio m1M 300 m2/
9 fine particle silicic acid 3wt%, polyethylene glyco-A/
(molecular weight 400) 1.5 wt% and sodium dodecylbenzenesulfonate Q, 5 wt% were kneaded and blended in a kneader at a resin temperature of 150°C, and an artificial turf sample was produced by press molding.

The charged voltage of the artificial turf sample was 0.5 kV or less.

Example 3 EVA resin (MI = 6yilo, containing VA [f
t = 5 wt%), 3 wt% of fine particle silicic acid with a specific surface area of 150 m2/9, and polyethylene glycol (molecular weight of 600 m2/9).
) 1.0wt%, sodium dodecylbenzenesulfonate 0
．． 5 wt%, i 0.5 wt% of the anti-static agent Chemistu 110 (manufactured by Sanyo Chemical Industries, Ltd.) was kneaded and blended in a kneader at a resin temperature of 150°C, and an artificial turf sample was formed using a press molding method. Created. The electrostatic voltage of the artificial turf sample is 0
．． It was less than 5kv.

Example 4 An artificial turf sample was produced by a VA-containing molding method using EVAall (M I =69710 minutes).

The charged voltage of the artificial turf sample was 0.51 cv or less.

Examples 5-8 In Examples 1-4, EVA4! All examples 1 to 1 except that low density polyethylene resin (MI = 4.5 p/10 min, density 0.918 f/d) was used in place of l1li.
Similarly to Example 4, the corresponding tests of Examples 5 to 8 were conducted to prepare artificial turf samples. The charged voltage of the artificial turf samples was 0.5 kV or less in all cases.

Example 9 The artificial grass samples obtained in Examples 1 to 8 were placed in a washing machine for 45 minutes.
After washing for a minute, it was dried.

This operation was repeated 10 times every 8 days.

After that, when I measured the electrostatic voltage, it was 0.5 in all cases.
k v or less, and there was almost no decrease from the initial stage.

Example 10 The artificial turf samples obtained in Examples 1 to 8 were left in a sunshine weather meter at 60°C for 1000 hours. After that, when we measured the charged voltage, in both cases, Q, 5
kV or less, and there was almost no decrease from the initial stage.

Comparative Example I EVA wood 111it (MI = 6f/10 min, VA content = 5wt%) was added with 1wt% of the antistatic agent Chemistat 110 (Sanyo Chemical Industries, Ltd.), and the resin temperature was 15 in a kneader.
Cross-mixing at 0℃ and press molding into artificial grass sump/
L/ was produced.

The pressure of zone 1 of the artificial turf sample was 0.5 kv or less. When the same durability test as in Example 9 was carried out on the artificial turf sump), the charging voltage was 3 kV or more, and the initial resistance was significantly reduced. Comparative Example 2 Artificial turf obtained in Comparative Example 1 When the sample was subjected to the same durability test as in Example 10, the charging voltage was 3 kV or more, which was a large decrease from the initial stage.

Comparative Example 8 Low density polyethylene resin (M
An artificial turf sample was prepared in exactly the same manner as in Comparative Example 1, except that I = 4.511710 minutes and density 0.918Q/d) were used. The electrostatic voltage of the artificial turf table top is 0.
It was less than 51cv. When the artificial turf sump /I/ was subjected to the same durability test as in Example 9, the result was 11 g.
The pressure was 3 kV or higher, and the drop from the initial stage was large.

Comparative Example 4 The artificial turf sample obtained in Ratio 1 Example 3 was subjected to the same durability test as in Example 10, and it was found that the band 4 pressure was dusted at 3 kV or higher, and the decrease from the initial stage was significant.

that's all

Claims (1)

[Claims] (A) 98.8 to 40% by weight of synthetic resin. (B) 1 to 40% by weight of particulate silicic acid or silicate having a specific surface area of 10 to 400 m^2/g. (C) At least one compound selected from the group consisting of polyethylene oxide compounds, polypropylene oxide compounds, and organic electrolytes having a salt structure.
Antistatic artificial grass consisting of 2 to 20% by weight