JPH08317894A - Conductive mat and its manufacture - Google Patents

Abstract

PURPOSE: To efficiently provide a mat preserving conductivity and an anti-static property over a long period by combining monofilaments of a conductive resin obtained by compounding conductive carbon black to polyvinyl chloride as a main agent with a nonconductive resin obtained by compounding various colorants to the polyvinyl chloride. CONSTITUTION: Monofilaments of a conductive resin obtained by compounding conductive carbon black to polyvinyl chloride as a main agent and a nonconductive resin obtained by compounding various colorants to the polyvinyl chloride are combined together. A molding roll 12 and a receiving roll 13 are provided at the position directly below the monofilament lines of the conductive resin and the nonconductive resin spun from a spinning pack 1 in a cooling water tank 11. A circulating pump 19 and a hot water heater 20 are connected to the cooling water tank 1, and the water temperature is kept constant by a water temperature regulator 23. Both resins are received on the upper face of the molding roll 12 to form a mat, and it is conveyed by a conveying belt 15 and a conveying conveyor 16 via the receiving roll 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive mat suitable for a floor material mixed with a conductive wire resin, and a method for efficiently manufacturing the mat.

[0002]

2. Description of the Related Art In recent years, the development of the electronic industry, offices and other office automation
The demand for conductive flooring materials with advanced functions is increasing due to modernization, development of precision equipment manufacturing industry, and cleanup of medical institutions such as hospitals. Many mats suitable for such applications are known, which are formed by depositing monofilaments in a random shape. Then, a method for mixing and producing an antistatic agent such as a surfactant when the raw material resin is melted by an extruder in order to impart an antistatic property to these mats, relates to the invention of the applicant. -279140
It is described in the publication of the issue. Japanese Patent Application Laid-Open No. Hei 5-307574 relating to the applicant is one in which a sizing agent is applied to the surface of the mat by spraying or the like in order to impart an antibacterial property, an antibacterial property, a fungicidal property and an insect repellency in addition to the antistatic property. It is described in the publication of the issue.

[0003]

However, the one disclosed in Japanese Patent Laid-Open No. 4-279140 has a problem that no effect other than antistatic is expected. In addition, JP-A-5-
Although it has various functions described in JP-A-307574 and can be effectively used, these functions are due to a sizing agent applied to the surface of the mat by spraying, etc. The function is reduced to
It is difficult to maintain the desired effect for a long time.
Therefore, it is an object of the present invention to propose a conductive mat which can maintain such a function and also has a different color effect, and an efficient manufacturing method thereof.

[0004]

In order to achieve the above object, the conductive mat according to the present invention is a mat formed by depositing a large number of monofilaments in a random loop shape. It is composed of a combination of different-color monofilaments of a functional resin.

Then, the constituent means of this conductive mat is
A spinning pack having a planar rectangular shape for spinning a large number of monofilaments is composed of a resin flow path switching device and a porous nozzle plate, and the communication flow paths 5A, 5B to the resin flow path switching device are arranged at symmetrical positions in the longitudinal direction. Are provided and connected to the extruders 6A and 6B, respectively, and a plurality of zone flow paths 9A and 9B, which communicate with the communication conduits 5A and 5B, respectively, are formed on almost the entire surface of the resin flow path switching device independently of each other. And the molten resin of the non-conductive resin and the conductive resin colored in different colors from each of the extruders 6A, 6B.
A cooling water tank is provided below the spinning pack, a molding roll is installed in the cooling water tank, each monofilament spun from the spinning pack is received on the surface of the molding roll and deposited in a random loop shape, and molding is performed. A matte coloring mat is formed with the rotation of the roll, the mat is pulled up by a cooling water tank, drained and dried, and a sizing agent is applied to the entire surface of the mat by spraying or the like, and the sizing agent is dried and cured by heating. .

Further, by mixing an antibacterial agent and an antifungal agent in a sizing agent applied to the entire surface of the mat, a mat having antibacterial and antifungal properties in addition to conductivity and antistatic property is manufactured.

[0007]

The molten resin extruded from one extruder is a black conductive resin containing conductive carbon black, and the molten resin extruded from the other extruder is a non-conductive resin containing a coloring agent. A monofilament of a different color is spun out from a large number of nozzle holes by supplying the monofilament from the channel to the zone channel. Then, the spun different-colored monofilaments are received on a forming roll in a cooling water tank, and are deposited in a random loop shape to form a spot-colored conductive mat. By applying a sizing agent to the entire surface of the conductive mat formed in this way and drying and curing it, a product having high tensile strength can be obtained.

[0008]

EXAMPLE In the example shown in FIG. 1, different color monofilaments of a black conductive resin A mixed with conductive carbon black and a non-conductive resin B colored in a color other than black have random loop shapes. Is a conductive mat M which is deposited on the surface of the conductive mat M and has a mottled pattern in which all adjacent monofilaments have different colors, and FIG.

FIG. 3 shows that the conductive mat M is produced with high productivity.
A spinning pack having a flat rectangular shape for spinning a monofilament group for continuous production is shown. The spinning pack 1 is composed of a resin flow path switching device 2 and a multi-hole nozzle plate 3. The switching device 2 is formed by being divided into a lid 2a and a resin flow path switching frame plate 4 for ease of work. And
The lid 2a, the resin flow path switching frame plate 4, and the perforated nozzle plate 3 are laminated in this order from the top. Resin flow path switching frame plate 4
As shown in FIG. 5, the extruders 6A and 6B are connected to the continuous pipes 5A and 5B projecting at symmetrical positions in the longitudinal direction.
In the embodiment, the conductive resin A is fed from the extruder 6A and the conductive resin A is fed from the extruder 6B.
The non-conductive resin B is extruded in a molten state and supplied.

[Table 1]

[Table 2]

[Table 3]

For the conductive resin A, the compound A shown in Table 1 is used in Table 2
It is compounded with the compounding agent shown in. Non-conductive resin B
Is blended with the compounding agent of formulation B shown in Table 3.

FIG. 4 is a plan view of the porous nozzle plate 3 provided on the resin flow path switching frame plate 4 of the spinning pack 1,
The resin flow path switching frame plate 4 is provided with trunk flow paths 7A and 7B communicating with the continuous conduits 5A and 5B along both sides in the longitudinal direction, and these trunk flow paths 7A and 7B are provided with oblique branch flow paths 8A, respectively. , 8B are alternately arranged in rows (five rows in the illustrated example) to form a zone flow path 9A with the trunk flow path 7A and the branch flow path 8A group, and symmetrically with the zone flow path 9A. The trunk channel 7B and the group of branch channels 8B form a zone channel 9B. Further, a large number of nozzle holes 10 are formed in the perforated nozzle plate 3 so as to face the branch channels 8A and 8B. And the extruder 6
The zone flow path 9 is connected via the communication pipe 5A connected to A.
A monofilament of conductive resin (black) is supplied from each nozzle hole 10 facing the zone flow path 9A by supplying the conductive resin A to A.
In the same manner, the monofilament of non-conductive resin B (gray,
(Red, green, etc.) are spun out. Each of the monofilaments having different color tones draws a random loop shape, and when they are deposited on the molding roll 12 described later, adjacent monofilaments are arranged in different colors to form a two-color spot pattern.

[0012]

[Embodiment 1] FIG. 5 is a schematic view of an apparatus configuration for continuously producing a conductive mat M with high productivity. With this device configuration, the cooling water tank 11 is installed below the spinning pack 1,
A molding roll 12 having a flat surface is arranged immediately below the monofilament row of the conductive resin A and the non-conductive resin B spun from the spinning pack 1 in the cooling water tank 11, and adjacent to the molding roll 12. A receiving roll 13 is arranged, and below the receiving roll 13, a carry-out belt 15 supported by belt wheels 14 and 14 'is provided. 16 is a cooling water tank 1
1 is a transfer conveyor that is arranged outside to transfer a mat.

Cooling water having a constant temperature (50 to 60 ° C.) is stored in the cooling water tank 11. The cooling water is set to a temperature at which the monofilament group spun from the spinning pack 1 is gradually cooled without being rapidly cooled so that uniform loop groups are formed. The water temperature of the cooling water tank 11 is adjusted as follows. That is, an outflow pipe 17 communicating with the inside is provided at an upper part of one side wall of the cooling water tank 11, and an inflow pipe 18 is also provided at a lower part thereof, and the outflow pipe 17 and the inflow pipe 18 are connected to a circulation pump 19 and a warm water heater 20. A water supply pipe 22 connected to the hot water heater 20 and further provided with a cooling supply valve 21 behind the hot water heater 20.
Connect. In addition, a water temperature controller 2 is provided on the other side of the cooling water tank 11.
3 is provided, and the detection unit at the lower end thereof is submerged in water. Then, in response to a signal generated by the water temperature controller 23, the water in the tank is sucked into the warm water heater 20 from the inflow pipe 18 and heated, and the heated warm water is returned from the outflow pipe 17 into the tank, or the cooling supply valve 21 is turned on. The cold water that is opened and sent from the water supply pipe 22 is caused to flow from the outflow pipe 17 into the tank, so that the water temperature of the cooling water tank 11 can be adjusted and kept constant. The surface S of the cooling water
Is set to have a predetermined height below the nozzle group.

Conductive resin A spun from spin pack 1
Then, each monofilament of the non-conductive resin B is hung down to be received by the upper surface of the forming roll 12, and a mat is formed by a loop formed by an irregular three-dimensional curve. The loops are connected to each other at intersections where they intersect with each other to be integrated. The conductive mat M formed in this way is carried out of the cooling water tank 11 by the carry-out belt 15 via the receiving roll 13 as indicated by the rotation of the molding roll 12.
While being transported by the transport conveyor 16, it is dried and wound into a roll. The conductive mat M rolled up in this manner is glued by the glue mechanism shown in FIG. 6 of the first embodiment.

[Table 4]

FIG. 6 shows an apparatus structure for applying the sizing agent P to the long conductive mat M manufactured by the apparatus structure shown in FIG. In FIG. 6, 24 is a feeding machine for sequentially feeding the long conductive mat M, 25 is a feeding belt for feeding the conductive mat M fed from the feeding machine 24 to the gluing mechanism, and both ends thereof are belt wheels 26, 26. The pressing roll 27 is provided above the belt wheel 26 '. Two
Reference numeral 8 denotes a glue tank, and the glue tank 28 selectively stores the paste agent P adjusted according to the formulation example shown in Table 4.
Reference numeral 29 is a glue supply pipe for pulling up the glue P in the glue tank 28 to a predetermined height position and supplying it, and a nozzle 30 is connected to the tip thereof. The sizing agent P is pumped by a squeeze pump 32 that is driven by a motor 31.

Reference numerals 33 and 33 'are a pair of upper and lower squeezing rolls, and a doctor plate 34 for scraping the sizing agent P is arranged on the lower rolls. 35 is a conductive mat M
Is a brush for brushing the back surface of the above to remove the excess sizing agent P. 36 is a feed belt whose both ends are supported by belt pulleys 37 and 37 '.
A doctor plate 38 for scraping off the sizing agent P attached to is attached, and a sizing container 39 for collecting the scraping sizing agent P is arranged below the doctor plate 38. The sizing agent P collected in the sizing container 39 is recirculated to the sizing tank 28, and again sprayed onto the surface of the conductive mat M from the nozzle 30 by the squeeze pump 32 through the sizing supply pipe 29. 40 is a belt wheel 4 at both ends
A drying furnace 42 is installed with the conveyor belts 1 and 41 'supported between the conveyor belt 40 and the upper running portion 40a of the conveyor belt 40. A cooling fan 43 is provided above the outlet of the drying furnace 42. Reference numerals 44 and 44 ′ are receiving rolls for the conductive mat M sent out from the conveyor belt 40. 45 is a feed belt having both ends supported by belt wheels 46 and 46 '.
47 is a winder for the conductive mat M. This winder 47
The motor 49 forcibly rotates the central roll of the plurality of rolls 48 to wind up the conductive mat M in a roll shape.

The conductive mat M has a feed rate of 0.6 to 1.5.
It is fed from the feeding device 24 at a rate of m / min, is fed to the gluing mechanism via the feed belt 25 and the press roll 27, and the glue P is sprayed from the nozzle 30 at the tip of the glue supply pipe 29 onto the entire surface thereof. The amount of glue used is 0.2 to 1.0 kg / m ² . The excess amount of the sizing agent P applied by spraying is removed by the squeezing rolls 33 and 33 ', and then the back surface of the conductive mat M is brushed by the brush 35. Next, the conductive mat M is sent to the conveyor belt 40 via the feed belt 36, and the paste P is dried and hardened while passing through the drying oven 42 heated to 150 to 170 ° C. while being transported. The sizing agent P is applied to each monofilament of the conductive mat M by spraying from the nozzle 30 and is cured to form a strong resin film. The conductive mat M discharged from the drying furnace 42 is cooled by the cooling fan 43, and then the hoist 47.
Rolled up. When the sizing agent P shown in Nos. 3 and 4 of the attached table 4 is used, the functions of antibacterial, antifungal and insect proof are added to the conductivity and antistatic property.

[0018]

[Embodiment 2] A convex stripe 50 having a diamond pattern is continuously provided on the surface of the receiving roll 13 'shown in FIG. As described above, the receiving roll 13 'having the diamond-shaped ridges 50 provided on the surface is replaced with the receiving roll 13 used in the apparatus configuration shown in FIG. When manufactured, a diamond-shaped concave groove 51 is formed on the surface of the mat formed by accumulating monofilament groups in addition to the diamond pattern of the ridge 50, and as shown in FIG. The conductive mat M'of different color with a mottled pattern excellent in the stopping effect is continuously formed. This conductive mat M'is also glued by the glue mechanism shown in FIG. 6 of the first embodiment.

[0019]

[Third Embodiment] The spinning pack 1 shown in FIG. 9 is for producing a conductive mat M ″ having a striped pattern of different colors by arranging monofilaments of the same color shown in FIG. 10 in a band having a width. 3 is a plan view of the resin flow path switching frame plate 4'and the multi-hole nozzle plate 3'.The resin flow path switching frame plate 4'is connected to the communication conduits 5A and 5B along both sides in the longitudinal direction.
B is provided, but one main flow path 7A is provided at a length of ⅔ in the longitudinal direction of the resin flow path switching frame plate 4 ′, and the other main flow path 7A is provided.
B is provided along the entire length in the longitudinal direction of the resin flow path switching frame plate 4 '. The resin flow path switching frame plate 4'is provided in the one main flow path 7A.
At the central position of the three branch flow channels 8A are arranged in a line at right angles to form a zone flow channel 9A, and in the other main flow channel 7B, three branch flow channels 8A are arranged on both sides of the branch flow channel 8A. The zone flow paths 9B are formed by arranging the branch flow paths 8A for each line orthogonally. Further, in the multi-hole nozzle plate 3 ', a large number of nozzle holes 10 are bored so as to face the branch flow paths 8A and 8B, as in FIG. Then, in the same manner as described in FIG. 4, the conductive resin A (black) is supplied from the zone flow path 9A, and the non-conductive resin B (grey, red, green, etc.) is supplied from the zone flow path 9B to each nozzle hole. When the monofilaments are spun out from 10, the monofilaments form the same color in the width of each of the branch channels 7A or 7B in the unit of 3 rows when they are deposited on the forming roll 12 while drawing a random loop shape. It becomes a striped pattern.

[0020]

INDUSTRIAL APPLICABILITY As described above, the present invention provides a conductive mat in which a monofilament of a conductive resin and a monofilament of a non-conductive resin, which have not been heretofore found, are mixed and are efficiently continuously connected. A method for producing the same can be provided, and the conductive mat has necessary and sufficient conductivity and antistatic property in which a monofilament of a conductive resin and a monofilament of a non-conductive resin form different color spot patterns. Further, by mixing a paste with a fungicide and a fungicide, functions such as a fungicide, a fungicide and an insect repellent are added. Therefore, the conductive mat according to the present invention can be used for various purposes as a flooring agent having conductivity, antistatic property and other functions.

[Brief description of drawings]

FIG. 1 is a perspective view of a conductive mat according to the present invention.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a side view of the spinning pack.

FIG. 4 is a plan view of a resin flow path switcher and a perforated nozzle plate suitable for manufacturing the conductive mat shown in FIG.

FIG. 5 is a schematic configuration diagram of a manufacturing apparatus for carrying out the first embodiment.

FIG. 6 is a structural schematic view of the gluing mechanism of the above.

FIG. 7 is a perspective view of a forming roll for carrying out the second embodiment.

FIG. 8 is a perspective view of a conductive mat manufactured in Example 2.

FIG. 9 is a plan view of a resin flow path switching device and a multi-hole nozzle plate for carrying out the third embodiment.

10 is a perspective view of a conductive mat manufactured in Example 3. FIG.

[Explanation of symbols]

 1 Spinning Pack 2 Resin Flow Path Switcher 3 Perforated Nozzle Plate 5A, 5B Communication Pipeline 6A, 6B Extruder 7A, 7B Main Flow Channel 8A, 8B Branch Flow Channel 9A, 9B Zone Flow Channel 10 Nozzle Hole 11 Cooling Water Tank 12 Molding Roll 13, 13 'Receiving roll 42 Drying oven A Conductive resin B Non-conductive resin M, M', M "Conductive mat P P Adhesive S Water surface

Claims (4)

[Claims] 1. In a mat formed by depositing a large number of monofilaments in a random loop shape, a conductive resin containing polyvinyl chloride as a main component and conductive carbon black mixed therein, and polyvinyl chloride as a main component. A conductive mat formed by combining monofilaments of a non-conductive resin in which various coloring agents are mixed. 2. The conductive mat according to claim 1, wherein a concave groove pattern is provided on the surface of the mat. 3. A spinning pack having a planar rectangular shape for spinning a large number of monofilaments is composed of a resin flow path switching device and a porous nozzle plate, and the resin flow path switching device has communication passages at symmetrical positions in the longitudinal direction. And each of them is connected to an extruder, and a plurality of groove-shaped zone flow passages communicating with the communication passages are formed on almost the entire surface of the resin flow passage switching device independently of each other. A conductive resin containing poly (pinyl chloride) as a main component and a conductive carbon rack mixed therein and a non-conductive resin containing polyvinyl chloride as a main component and various colorants added thereto are delivered, and the spinning pack A cooling water tank is provided below the cooling water tank, a molding roll is installed in the cooling water tank, and each monofilament spun from the spinning pack is sequentially hung and received on the surface of the molding roll to form an irregular three-dimensional shape. A mat is formed by a loop consisting of curved lines, and a paste containing vinyl chloride for paste as a main component and a plasticizer or a plasticizer for electrification and the like is added to the entire surface of the mat by spraying, and then a drying furnace. A method for producing a conductive mat, characterized in that the sizing agent is dried and cured by heating while passing through. 4. The method for producing a conductive mat according to claim 3, wherein an antibacterial agent and an antifungal agent are mixed in the paste agent.