JPH07102748A - Anti-static treatment of carpet - Google Patents

Abstract

PURPOSE:To effectively prevent electrostatic troubles, by spreading a carpet underlay on the setting bed under a floor and covering it with an electric conductive sheet and further laying a carpet thereon. CONSTITUTION:A carpet underlay 3 is installed on the setting bed G under a floor and covered with an electroconductive sheet 1 thereon and further, a carpet 2 is spread thereon. Or after the setting bed G under the floor has been covered with the electric conductive sheet 1 without a carpet underlay, the carpet 2 is laid down. A wooven cloth, a non-wooven cloth, or other electric conductive sheets bearing aluminum foil sheet, carbon fiber or metallic coating synthetic fiber, etc., as much as 2-40% are favorable as the conductive sheet 1. As a result, even if the mixing cent of antistatic materials is not increased in the carpet, or the use condition is severe like in a low temperature, the antistatic characteristic is greatly improved.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for permanently imparting high-performance antistatic performance to a carpet which has no antistatic ability on the carpet itself. 2. Description of the Related Art Conventionally, when a person walks on a carpet under particularly low humidity and touches a metal door knob or a metal fitting around the desk, it is accumulated between footwear and the carpet. Static electricity generated when the human body voltage is 3 kV or more suddenly discharges and often experiences discomfort due to electric shock, such as a needle stick on a fingertip, and improvement of its antistatic property has been strongly demanded. . As an antistatic measure, for example, as a permanent antistatic treatment method, a tufted carpet obtained by mixing antistatic yarn in a high content in a carpet pile is further combined with a conductive adhesive or a conductive base cloth. Was presented. However, this method is considerably expensive. Further, in the case of a woolmark carpet, since the blended spinning rate of the antistatic yarn must be 0.3% or less, the woolmark carpet cannot obtain an effective antistatic performance. Further, when -2- leather shoes were put on a woven carpet such as Wilton carpet or Axminster carpet, or when a gripper construction method was performed by laying a carpet underlay, particularly high electrification voltage was generated. An object of the present invention is to provide an antistatic construction method for a carpet which has good performance even if a wool-marked woven carpet is walked with leather shoes in a low humidity state, and even if it is a gripper construction method of felt floor. The purpose is to provide. [0006] The present application is characterized in that a carpet underlay is laid on a floor substrate, or is not laid but is covered with a conductive sheet and then the carpet is placed. The antistatic method of is as the gist. As an embodiment of the present invention, the carpet underlay is not laid on the floor substrate, but the conductive sheet is directly interposed between the carpet and the floor substrate. A carpet underlay is laid on the floor base, the carpet underlay is covered with a conductive sheet, and the carpet is placed on the conductive sheet for construction. A description will be given below with reference to the drawings. 1 and 2
[FIG. 3] is a cross-sectional view of the embodiment of the present invention. In FIG. 1, a conductive sheet 1 is placed on the floor substrate G.
Cover with. As the conductive sheet, an aluminum foil sheet, a woven cloth or a nonwoven cloth containing 2 to 40% of carbon fibers, metal coated synthetic fibers, metal fibers and the like and other conductive sheets are suitable. -3- [0010] Carpet 2 is constructed in a state where a conductive sheet is wholly or partially coated (for example, within 1.5 m around a door) on a floor base. The carpet 2 may be any known carpet, but the method of the present invention is particularly effective particularly when a woven carpet having no other antistatic method is used. For example, all-new wool (woolmark) Wilton or Axminster woven carpet containing less than 0.3% of antistatic yarn is used. The carpet 2 is placed on the conductive sheet and constructed by a gripper method or the like. In FIG. 2, a carpet underlay 3 is laid on the floor base G. As the carpet underlay, a sheet of polyurethane or other resin foam or anti-wool felt is used. The carpet underlay is partially or entirely covered with the conductive sheet 1, and the carpet 2 is placed on the conductive sheet and is constructed by a gripper method or the like. According to the method of the present invention, the human body voltage becomes about 50% of that of the conventional method, and the human body voltage which receives an electric shock can be suppressed to 3 kV or less. The conductive sheet 1 may be appropriately adhered to the back side of the carpet 2 or the front side of the carpet underlay 3 with an adhesive (preferably a conductive adhesive). EXAMPLES [Measurement method of human body voltage] Evaluation of charging property is performed according to JIS L.
1021-1979 6.16.1 According to the Stroll method, wear leather sole shoes at 20 ° C. × 20% RH and wear 90
The stripped human body voltage was measured when walking in parallel on a cm square carpet. The average surface electric resistance value * 1 is 2.
It is preferably 5 × 10 ⁴ to 1 × 10 ⁶ Ω from the viewpoints of both safety to human body in case of electric leakage and antistatic effect. Example 1 A carpet according to the present invention has the following C ₀ ,
A Wilton woven carpet of 100% new wool with a pile height of 7 mm was used except for the composition of the antistatic yarns indicated by C ₁ and C ₂ . C ₀ : Thunderon * 1 yarn 0.27% mixed as an antistatic yarn C ₁ : 〃 stainless steel yarn 0.42% 〃 C ₂ : 〃 〃 0.08% 〃 * 1 Nippon Silkworm Dyeing Co., Ltd. product Antistatic as a thread [0017] the carpet underlay use state, U ₀ to display, U _1, U ₂ is U _0: No underlay U _1: thickness 10mm anti-hair needle felt underlay if you use U _2: 〃 urethane foam Defined as using underlay. In addition, S ₀ , S ₁ , S for displaying the conductive sheet
₂ is S ₀ : no conductive sheet S ₁ : when using a thin paper conductive sheet containing rayon as a main component and 5% of Thunderon and having a weight of 30 g / m ^2. S ₂ : rayon as a main component It is defined as a case where a thin paper conductive sheet having a weight of 45 g / m ² containing 20% is used. The carpets C ₀ , C ₁ and C ₂ having the above-mentioned construction were installed on the mortar floor under the carpet underlay condition U ₀ . The human body voltage (kV) of the obtained carpet is shown in Table 1 Example. [Comparative Example 1] On the other hand, under the carpet underlay condition U _0, under the conductive sheet condition S ₀ , the human body voltage is shown in Table 1.
It was as in the comparative example. In this way, the human body voltage is about 50
% Has also decreased. [Embodiment 2] Under the conditions U ₁ and U ₂ when a carpet underlay is further laid, the carpet underlay is laid on the floor base, covered with a conductive sheet, and the carpet C _{0 is} placed thereon. , C ₁ and C ₂ were applied. The human body electrification voltage as shown in Table 2 Example was obtained. 3kV especially at C ₀ and C ₁
Was obtained, and a very excellent antistatic effect was obtained. Comparative Example 2 Carpet Underlay Conditions U ₁ , U ₂ ,
Under the conductive sheet condition S ₀ , the human body electrification voltage was obtained as in the comparative example of Table 2. In this way, when the construction was performed on the under carpet without the conductive sheet, the human body voltage was as high as 6 kV or higher. Comparing the results of Example 2 and Comparative Example 2 obtained above, in the state of C ₂ U ₂ , 10.1 kV is 3.3 kV, and 〃 6.8 kV of C ₁ U ₁ is 1.9 kV, which is about a maximum. 70% of human body voltage is reduced and sufficient 3
An antistatic performance of kV or less could be obtained. As described above, in the first and second embodiments,
A high antistatic effect was obtained for a woven carpet that has not been conventionally antistatic. -6- [Effects of the Invention] The present invention has the following effects. (1) By interposing a base material having an antistatic property between the carpet and the underlay, the antistatic property is improved even in severe use under low humidity without increasing the mixing ratio of the antistatic yarn on the carpet so much. I was able to. (2) It was possible to obtain a human body voltage as low as 1.9 V with low-humidity leather shoes. (3) By implementing the antistatic construction method of the present invention within 2 m of the door, even if it is relatively dry near the door knob, there is no electric shock. (4) Compared with an inexpensive antistatic surfactant treatment, the present invention has semipermanent antistatic performance without promoting soiling of the carpet. (5) Since the base material having antistatic property does not necessarily have to be interposed entirely between the carpet and the underlay, it becomes more economical.

[Brief description of drawings] [Fig. 1] A cross-sectional view of a woven carpet constructed by interposing a conductive sheet on a floor substrate without a carpet underlay. [Fig. 2] A carpet underlay laid on the floor substrate. Sectional view in which a carpet is constructed by covering the top with a conductive sheet [Explanation of reference numerals] 1 is a conductive sheet, 2 is a carpet, and 3 is a carpet underlay. -7- [Reference number] H4P-002 [Table 1] [Table 2]

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[Procedure amendment] [Date of submission] October 17, 1994 [Procedure Amendment 1] [Amendment document name] Drawing [Amendment item name] All drawings [Amendment method] Change [Amendment content] [Figure 1] [Fig. 2]

Claims (1)

[Claims] 1. Lay a carpet underlay on the floor base,
A method of preventing static electricity of a carpet, which comprises covering with a conductive sheet and then placing the carpet without laying.