JP2824685B2 - Floor material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a floor material using waste tires, and more particularly, to improving the adhesiveness of a strip material to a backing cloth and improving impact resistance. It is related to the floor material that has been used.

[Conventional technology]

Conventionally, in order to effectively use waste tires, the tire side portion is spirally cut in the tire circumferential direction to form a string-shaped strip, and a plurality of the strips are arranged in parallel with each other,
BACKGROUND ART Floor materials that are bonded to a backing cloth via an adhesive have been proposed.

As a backing cloth for this flooring, a cloth using a glass fabric and further using a chloroprene-based adhesive force thereon is commercially available, but has the following problems.

[Problems to be solved by the invention]

That is, when the flooring material is wet with water, the interfacial adhesive between the glass fabric and the chloroprene-based adhesive is reduced, so that the adhesive strength of the strip is reduced, peeling is likely to occur, and the glass fabric is used. As a result, the glass fabric is broken due to the impact and the heavy object is dropped, so that not only the adhesion between the floor surface and the floor material is deteriorated, but also the adhesion failure between the strip and the glass fabric occurs, and the floor material is damaged. This causes a decrease in durability.

[Object of the invention]

The present invention was devised in view of such conventional problems, and is a floor material obtained by cutting waste tires on a strip and bonding them in parallel on a backing cloth. It is an object of the present invention to provide a floor material having improved durability and improved impact resistance and excellent durability.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a backing cloth for flooring, which is formed by applying a resorcinol-formalin resin and a rubber latex to an organic fiber woven fabric and then coating a chloroprene rubber cement on one surface. The amount of the rubber cement adhered is 50 g / m ^{2 to} 20
A backing cloth in the range of 0 g / m ² is used, and the rubber cement is a backing cloth coated with cement containing sulfur-modified chloroprene rubber as a main component.

[Function of the invention]

The present invention is configured as described above, so that water-resistant adhesion,
Adhesion after impact is also good, and a flooring material having good dimensional stability and good appearance can be obtained.

 Hereinafter, the outline of the present invention will be described in detail.

The organic fiber fabric used for the flooring of the present invention is formed from synthetic fibers such as 6 nylon, 66 nylon, polyester, and vinylon. Here, organic fibers are used.
This is because they are not destroyed by the impact on the flooring material, unlike inorganic fibers such as glass fibers.

On the other hand, the fabric structure, the fabric density, the fineness of the fibers used, and the like are not particularly limited.

In these organic fiber fabrics, nylon or polyester fibers are usually preferably used from the viewpoint of cost and dimensional stability. A plain woven fabric is preferably used as the woven structure from the viewpoint of its form stability. The reason why this fabric is heat-impregnated with a mixed solution consisting of resorcinol formalin resin and rubber latex is not only to prevent misalignment of the fabric and tissue collapse, and also to improve dimensional stability, but also to apply rubber cement This has the effect of increasing the affinity with the cement and improving the adhesive strength between the cement and the woven fabric.

Here, as the rubber latex in the mixture of the resorcinol formalin resin and the rubber latex, vinyl pyridine / styrene / butadiene terpolymer latex,
Styrene-butadiene copolymer latex, natural rubber latex, chloroprene latex and the like are used, and vinylpyridine-styrene-butadiene terpolymer latex or chloroprene latex is preferably used from the viewpoint of rubber cement affinity. Of course, a latex obtained by mixing these latexes may be used.

Such a mixture (hereinafter abbreviated as RFL) is impregnated with the fabric and subjected to a heat treatment. The amount of the mixture adhering to the fabric is preferably in the range of 3 to 15% in terms of dry weight. If it is less than 3%, not only does the morphological stability of the fabric become unsatisfactory, but also the affinity for cement decreases. On the other hand, if it exceeds 15%, the flexibility of the woven fabric is reduced, and not only the handleability is deteriorated but also the cost is increased.

The heat treatment is performed after drying at 100 to 150 ° C for 30 seconds to 5 minutes.
Bake at ℃ to 240 ℃. Here, when the baking temperature is low, the dimensional stability of the woven fabric deteriorates.

Chloroprene rubber cement is applied to the woven fabric thus treated.

Here, the chloroprene rubber cement is used.
This is because it is rich in flexibility and flexibility, and is excellent in initial adhesiveness because it is a contact type. Another advantage is that the cost is low. The type of chloroprene rubber is not particularly limited, but a medium crystallization rate is preferable.

The reason for this is that if the crystallization rate is high, the initial adhesive strength is large, but the adhesive holding time is short, and if the crystallization rate is low, the adhesive holding time is long, but the initial adhesive strength is inferior.

In the present invention, a sulfur-modified type is preferably used because of its excellent adhesiveness to fibers and a medium crystallization rate.

This rubber cement is coated on the fabric by knife coating or the like on one side, and the amount of adhesion greatly affects the adhesive strength to the tire strip. 50 g /
If it is less than m ² , the adhesive strength is poor and the strip is easily peeled. On the other hand, if it is 200 g / m ^2, greater than the coat fabrics generally are the rolled shape, fabric per coated side is stuck to the back surface of the fabric when pulled out from a roll, not only it becomes impossible drawer, If it is forcibly pulled out, there is a problem that the coat layer is removed on the back surface of the fabric.

Using the coated fabric produced as described above, a floor material is manufactured by the following means.

1 (a) to 1 (e) are explanatory views showing an example of a manufacturing process of a flooring material of the present invention.

In the present invention, first, as shown in FIG.
Is cut annularly in the circumferential direction, and the tire side portion 4 is cut off (tire side portion cutting step).

The cut tire side portion 4 is spirally cut in the tire circumferential direction by a cutter 5 as shown in FIG. 1 (b), whereby a string-shaped strip material 6 is obtained (stripping process).

Next, as shown in FIG. 1 (c), one surface of the obtained strip material 6 is buffed by a buffing machine 7 to be erected, thereby forming a buffed strip 8 (buffing step).

Next, as shown in FIG. 1 (d), a plurality of buffed strip materials 8 are taken out of the storage box 9 in parallel with each other so that the upright surface (buff surface) becomes the surface, and
After passing through the cement tank 11 while holding it down, the adhesive Q is attached to the back surface (the surface opposite to the veil rising surface) (the cementing step), and the adhesive Q is dried by the dryer 12. (Drying step), the rubber backing-coated backing cloth 13 according to the present invention is laminated and integrated (lamination step),
This integrated material is wound (winding step).

The rubber cement Q is adhered to the strip material 6 through the cement tank 11, but may be bonded to the backing cloth 13 of the present invention without using cement. In this case backing cloth 13
By heating the coated surface to 40 to 80 ° C., good adhesion can be obtained. In this way, a flooring material 20 as shown in FIG. 1 (e) is obtained.

The floor material 20 may be cut into a predetermined size when used.

 Next, the present invention will be described with reference to embodiments.

〔Example〕

(1) Production of Backing Cloth [Conventional Example] As a glass woven fabric, a plain woven fabric was prepared in which ECG 150 1/3 glass fibers were used in a number of 120 per 5 cm in both the vertical and horizontal directions.

On the other hand, as an example of the present invention, 66 nylon 840D fiber is 5 cm.
A plain woven fabric having 45 punches in both the vertical and horizontal directions was used.

[Manufacture of conventional backing cloth]

(Conventional Example 1) Using the above glass fabric, a rubber cement A shown in Table 1 below was knife-coated on one side to a dry weight of 100 g / m ² and wound into a roll.

The coat was coated twice so that cement could not be adhered at one time, and the coat was adjusted to 100 g / m ² . Each coat was dried at 100 ° C. for 2 minutes to remove the solvent.

(Comparative Example 1) The above 66 nylon fabric was coated on one side with rubber cement A shown in Table 1 so that the cement adhesion was 100 g / m ² as in Conventional Example 1.

 Other conditions are the same as in the first conventional example.

(Invention 1) RFL having the composition shown in Table 2 below was added to 66 nylon fabric.
And then dried at 120 ° C. for 3 minutes and heat-treated at 180 ° C. for 2 minutes.

Using this cloth, cement was coated in the same manner as in Comparative Example 1.

The cement deposit is 100 g / m ² .

(Invention 2) The same RFL treated cloth as in Invention 1 was coated with the cement shown in Table 1B so as to adhere to 100 g / m ² .

(Comparative Examples 2 and 3) The same fabric as that of Invention 1 was coated with the same amount of cement A as shown in Table 1 so that the adhesion amount of cement A was 40 g / m ² (Comparative Example 2) and 250 g / m ^2. (Comparative Example 3) was prepared.

 Here, Comparative Example 2 was prepared by one coat.

 On the other hand, Comparative Example 3 was prepared by coating four times.

(Inventions 3 and 4) In the same manner as in Invention 1, only the cement adhesion amount was 60 g / m ² .
The one changed to 150 g / m ² was made.

Here, the 60 g / m ² product (Example 3) was prepared by two coats.

A 150 g / m ² product (Invention 4) was prepared by three coats.

Using the backing fabric prepared as described above, a floor material was manufactured by the method shown in FIG.

 Here, a rubber strip having a width of 10 mm was used.

In addition, only the invention 5 was manufactured by heating the backing cloth surface to 50 ° C. without applying the cement to the rubber strip. Here, the present invention 5 used the backing cloth of the present invention 1.

All others were manufactured by attaching cement to a rubber strip. All cement adhesions were tested to be constant.

The flooring material was manufactured as described above. However, in Comparative Example 3, the backing cloth wound in a roll shape was in close contact with the coated surface and the back surface of the cloth, and could not be pulled out.

The flooring material thus obtained was subjected to the following adhesion test.

Initial Adhesive Force The force required to peel one strip from the backing fabric was measured. The peeling speed was measured at 200 mm / min and the number of repetitions was 10. The results are shown as average values.

Water-Resistant Adhesive Strength The flooring material was immersed in water at 20 ° C. for 7 days, immediately after being taken out, and in a wet state, the peel strength was determined in the same manner as the initial adhesive strength.

Adhesive force of impact force With a load of 15 kg, the radius of curvature at the tip is 12.5 mm, the thickness is 25 mm,
After a push rod having a width of 50 mm was repeatedly dropped from a height of 50 mm above the floor material, the adhesive strength of the portion to which the drop impact was applied was measured in the same manner as in the initial adhesion. The drop was repeated 10,000 times.

Dimensional stability The floor material was left in a gear oven at 120 ° C for 30 minutes, then returned to room temperature, and the dimensional change before and after the heat treatment was measured. The dimensional change was determined by the shrinkage (%) in the length direction of the strip.

Appearance The appearance of the fibers of the backing fabric was visually checked. The above test results are summarized in Table 3 below.

As shown in Examples, when the glass fabric of Conventional Example 1 was used, the initial adhesive strength was good, but it was found that the adhesive strength was greatly reduced when immersed in water. When an impact is applied, the glass fabric is broken, and the adhesion becomes substantially zero.

On the other hand, when a 66-nylon fabric is used and the fabric is simply coated with cement as shown in Comparative Example 1, the initial adhesive is good, and the adhesive strength after impact tends to be improved. . This is presumed to be because the adhesion between the rubber strip and the backing cloth was further increased by the impact pressure.

However, the adhesive strength after immersion in water tends to decrease as in the case of a glass fabric, and since heat treatment is not performed, heat shrinkage is large and there is a problem in dimensional stability as a floor material. In addition, misalignment of the weft of the backing cloth is large, and there is a problem in appearance. This was caused when a high-viscosity rubber cement was knife-coated. In order to solve this problem, it was necessary to increase the number of yarns to be added, resulting in an increase in cost.

On the other hand, as shown in the present invention 2, a 66 nylon woven fabric pre-impregnated with RFL has good initial adhesion, water-resistant adhesion, and good adhesion after impact, and also has good dimensional stability and appearance. Clearly, a flooring material having excellent durability compared with the conventional one is provided.

Further, as shown in the present invention 2, it can be seen that the use of sulfur-modified chloroprene as the rubber cement further improves the adhesive strength.

On the other hand, adhesion of the rubber cement, as is apparent in Comparative Examples 2, 3 and the present invention 3,4, stay within a range of 50 to 200 g / m ² from the good adhesion and flooring during manufacture of processability It turns out that things are necessary.

Further, as shown in the present invention 5, using the backing cloth of the present invention 1,
It can be seen that if the cloth is heated and a rubber strip is stuck, a level of adhesion that does not pose a practical problem can be obtained without attaching rubber cement to the rubber strip.

〔The invention's effect〕

The present invention cuts the tire side portion of the waste tire into a spiral shape in the tire circumferential direction to form a cord-like strip material as described above, and arranges the plurality of strip materials in parallel to form a backing cloth. In the bonded floor material, the backing cloth was formed by applying a resorcinol-formalin resin and a rubber latex to an organic fiber fabric, and then coating the chloroprene-based rubber cement on one surface, so that durability and dimensional stability were achieved. Thus, there is an effect that a floor material having an excellent appearance can be obtained.

[Brief description of the drawings]

1 (a) to 1 (e) are explanatory views showing an example of a manufacturing process of a flooring material of the present invention. 1 ... tire, 2 ... shoulder part, 3 ... rotary blade, 4
... tire side part, 5 ... cutter, 6 ... strip material, 7 ... buffing machine, 8 ... buffed strip, 9 ... storage box, 10 ... press roller, 11 ... cement tank, 12 ... ... dryer, 13 ... backing cloth, 20 ... flooring, Q
…… adhesive.

Claims (3)

(57) [Claims] 1. A tire side portion of a waste tire is spirally cut in a tire circumferential direction to form a string-like strip material, and a plurality of the strip materials are arranged in parallel and bonded to a backing cloth. The flooring material, wherein the backing cloth is formed by subjecting an organic fiber woven fabric to a heat treatment of impregnating a resorcinol-formalin resin and rubber latex, and then coating one surface of a chloroprene rubber cement. 2. The method according to claim 1, wherein the amount of the rubber cement is 50 g / m ^{2 to} 20 g / m ^2.
Floor material according to claim 1 with a backing fabric is in the range of 0 g / m ^2. 3. The flooring material according to claim 1, wherein said rubber cement is a backing cloth coated with cement containing sulfur-modified chloroprene rubber as a main component.