JP2791845B2 - Static elimination functional material and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carpet base material, a packaging material, and other materials having a static elimination function and a method for producing the same.

[0002]

2. Description of the Related Art A general material for preventing static electricity and removing static electricity is a material obtained by kneading conductive powder, fiber, or the like, or imparting conductivity by depositing or laminating a metal. These are not easily charged by themselves, but do not have static elimination properties.
When the charged body is brought into contact, the apparent charged voltage decreases, but when the charged body is separated, the charged body has the original charged voltage and is not discharged. In addition, the partner rubbed by the existing material is charged.

[0003] In addition, those having a static elimination function include one in which a fibrous material such as metal or carbon is brought into contact with a charged body to be grounded, or one in which a static elimination is performed by corona discharge. Due to the above limitations, it is not effective to wrap a charged material in a cloth shape. Equipment that is harmonized by ion generation requires large-scale equipment, and the effect is not continuous.

Therefore, a processed fiber product having an antistatic effect disclosed in Japanese Patent Application Laid-Open No. 63-264982 has been developed.
It is charged to the plastics / rubber latex in textiles such as woven fabrics, nonwoven fabrics, honeycomb nets, and other papermaking processed by plastics / rubber latex in the range of about 0.2 to 30% of the base material. A chemical agent or a chemical agent such as an antistatic agent is adsorbed or mixed, and a chemical agent or a chemical agent such as an antistatic agent firmly adheres to textiles to maintain the effect.

[0005]

However, in the above-mentioned processed fiber products, the antistatic agent is liable to agglomerate, the coating film is not made uniform, and this has an adverse effect on the charge removal efficiency.

Accordingly, the present invention provides a method for improving the durability, in which the coating films are not aggregated and uniform, so that the static elimination can be performed in a short time, the static elimination efficiency is high, and a high static elimination can be performed by extending the static elimination time. An object of the present invention is to provide an excellent charge eliminating functional material and a method for producing the same.

[0007]

According to the present invention, there is provided a coating film formed by applying a solution in which a polymer emulsion containing cellulose and a surfactant are mixed to the surface of a material having a large surface area such as fibers and having an air layer. Was formed as a static elimination functional material.

[0008] In addition, as a method for producing the charge removing functional material, a solution in which a polymer emulsion containing cellulose and a surfactant are mixed is applied to the surface of a material having a large surface area such as a fiber and an air layer, and the surface is coated. To form these coating films.

Materials having a large surface area and having an air layer include paper, foam, net, embossed film and the like in addition to fibers such as woven fabric and nonwoven fabric. Good examples of this material include polyolefins, polyesters,
Melt spinable polymers such as polyamide, dry, wet,
There is a nonwoven fabric which is fixed by heat bonding, binder bonding, needle punching or the like without spinning after spinning by a method such as melt blowing.

The cellulose-containing polymer emulsion includes, for example, cellulose-containing polyvinyl acetate emulsion and cellulose-containing polyethylene glycol. Since cellulose needs to be uniformly dispersed in the polymer emulsion, etherification treatment or the like is required.
Further, a dispersant such as diglyceride may be added as needed.

The above-mentioned surfactant is not limited, but must be dissolved in water by adding an auxiliary agent such as a cellulose-containing polymer emulsion. Examples include nonionic, polyhydric alcohol, oxyethylene, oxypropylene, and alkylamine derivative systems, and one or more of these may be mixed.

When the above solution is set to 100, the ratio of each drug is 0.1% for the cellulose-containing polymer emulsion.
1 to 30, the surfactant is 0.2 to 6, and the rest is water. The cellulose content in the above solution is 0.1 to 5
% Is preferred.

[0013]

The charge eliminating functional material according to the first aspect of the present invention forms a coating film containing a surfactant on the surface, so that the charge of the substance is eliminated only by directly contacting the charged substance. In addition, since this surfactant is adsorbed on the cellulose-containing polymer emulsion, the cellulose forms a film, and the surfactant is not aggregated and is uniformly distributed on the coating film.

In the invention according to claim 2, the method of applying the solution to the surface of the material may be a method of dipping the material in the solution, or a method of applying the solution to the material with a brush or the like, or spraying the material as a mist. Is also good.

[0015]

Embodiments of the present invention will be described below.

In Example 1, a long-fiber non-woven fabric (having a basis weight of 30 g / m ² ) produced from PP by a spunbond method was used as a base material, and an aqueous solution comprising the following chemical components was prepared and applied thereto. The drug component consists of a surfactant, water, a polymer emulsion and cellulose, and forms a polymer emulsion as a whole.

As the surfactant, a mixture of a higher alcohol-based nonionic surfactant and an alkyl ether-based nonionic surfactant was used at a concentration of 21 g / l.

As the polymer emulsion, 0.1 g of polyethylene glycol # 200 manufactured by NOF Corporation
/ G, and 0.5 g of diglyceride as a dispersant
/ L, cellulose ether 3.5 as a cellulose component
g / l was used.

In comparison with Example 1, an aqueous solution consisting of only the above-mentioned surfactant was applied to the above-mentioned substrate as Comparative Example, and an aqueous solution consisting of the above-mentioned surfactant and the above-mentioned polymer emulsion was applied to the above-mentioned substrate. Was applied to Comparative Example 2. Using these as measurement samples, the static elimination performance was measured. In these static elimination performance measuring methods, as shown in FIG. 1, an insulator having a charged voltage V ₁ is neutralized with a measurement sample for t minutes, and then the charged voltage V ₂ of the insulator is measured.

Table 1 shows the results of measuring the charged voltage of the insulator when the static elimination time was varied by this measurement method.
This measurement was carried out at a temperature of 23 ° C. and a humidity of 50%.
₁ was measured at 7,000V. A polypropylene molded product (surface specific resistance value 4.9 × 10 ¹⁶ Ω) was used as the insulator. Table 2 shows the static elimination rate in each case of Table 1. This charge removal rate is represented by the charge removal rate V = (V ₁ −V ₂ ) ÷ V ₁ × 100 (%).

[0021]

[Table 1]

[0022]

[Table 2]

[0023] Table 1 and Table 2 of results Example 1 are all clearly charged voltage V ₂ is lower than the Comparative Examples 1 and 2, a discharge rate is high. In Example 1, the charged voltage in one minute of the charge elimination time was 4 KV or less, and the charge elimination rate was 50% or more. Further, the charge voltage has been reduced to 1 KV due to the static elimination for 24 hours.

Practical tests were performed on the sheets of Example 1 and Comparative Example 2, which have the same effects as those of the above Examples and Comparative Examples, and the durability (stability) of the static elimination performance was compared. As shown in FIG. 2, a practical test was conducted using an electric component (made of ABS, size 5).
(0 × 100 × 5 mm) in a state of being packed with cardboard during transportation, the static elimination functional material of the sample was used to prevent the adhesion of dust to the electric components due to static electricity, and the adhesion of dust to the electric components was examined.

Table 3 shows the state of adhesion of dust according to this practical test. Among the 500 electric parts, those having dust adhesion were counted. The static elimination functional material was repeatedly evaluated for reuse in Example 1 and Comparative Example 2. Comparative Example 3 is a commonly used PE foam sheet, and a new article was used once and disposable during transportation.

[0026]

[Table 3]

Tables 4 and 5 show the results obtained by measuring the static elimination performance of the above-described test of Example 1 and Comparative Example 2 after use for 5 weeks in the same manner as in the above method.

[0028]

[Table 4]

[0029]

[Table 5]

According to these static elimination performance tests, in the case of Example 1, the charged voltage per one minute of static elimination time was 4 KV or less, and the static elimination rate was 50% or more. Furthermore, the charged voltage after the static elimination for 24 hours is reduced to 1 KV. From these facts, it can be seen that the case of Example 1 containing cellulose has better static elimination performance and higher durability than Comparative Example 2.

[0031]

According to the present invention, the present invention is configured as described above.
The invention described in the section (1) does not require a large-scale static elimination facility, and can eliminate static electricity by simply contacting a charged object. In addition, static electricity can be removed in a short time, the static elimination rate is high, and there is no adhesion of dust, so that workability is improved in post-processing work of products and the like. Further, by extending the charge elimination time, more sophisticated charge elimination can be performed. Moreover, the static elimination performance is maintained for a long time, and the durability is good.

In addition, in addition to the above effects, the present invention does not cause the surfactant to agglomerate due to the film-forming action of cellulose, spreads evenly in the coating film, and has extremely high static elimination performance.

According to the second aspect of the present invention, a static elimination functional material can be manufactured only by preparing a solution and applying the solution to a material, and a large-scale facility is not required, and the manufacture is extremely simple.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration and a procedure for measuring the static elimination performance of the present invention.

FIG. 2 is an explanatory sectional view showing a configuration of a practical test of the present invention.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Doi 841-3, Shirahama-cho, Himeji-shi, Hyogo Idemitsu Petrochemical Co., Ltd. (72) Inventor Hideki Harada 841, 3-1, Shirahama-cho, Himeji-shi, Hyogo Idemitsu Petrochemical (56) References JP-A-3-36527 (JP, A) JP-A-53-96798 (JP, A) JP-A-53-123388 (JP, A) JP-A-63-28978 (JP, A) A) JP-A-3-153619 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D06M 15/00 H05F 3/00 D06M 13/00

Claims (2)

(57) [Claims] 1. A coating film formed by applying a solution obtained by mixing a cellulose-containing polymer emulsion and a surfactant on the surface of a material having a large surface area such as a fiber and an air layer. , Static elimination functional material. 2. A method in which a solution in which a polymer emulsion containing cellulose and a surfactant are mixed is applied to the surface of a material having a large surface area such as a fiber and an air layer, and these coating films are formed on the surface. A method for producing a static elimination functional material, characterized in that: