JPH11269859A - Resin-coated structure made of fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing material to be spread for preventing collapse of filling capable of preventing damage caused by holding the reinforcing material between stone and rock in soil. SOLUTION: In a resin-coated structure 1 made of fiber having at least one or more kinds of resin and one or more kinds of fiber as the constituent, the weight ratio of resin/fiber is 0.2-20, and a foam magnification shown in the formula is 1.05-50: form magnification= volume after foam treatment/volume before foam treatment×100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous resin-coated structure using fibers, which is mainly used as a reinforcing material in the field of civil engineering.

[0002]

2. Description of the Related Art Conventional techniques for imparting impact resistance of a resin-coated fiber reinforcement in the field of civil engineering include:
A high-density polyethylene (hereinafter, referred to as HDPE) resin melted while supplying reinforcing fibers in the vertical or horizontal grooves of a metal roll having grooves formed in the vertical and horizontal directions, and feeding and forming the grooves. There is a way. The above method uses fiber and HDPE
Although it does not have adhesiveness to the surface, it has a HDPE cross-sectional area of 10 times or more the cross-sectional area of the reinforcing fiber due to the deep groove, and imparts impact resistance with the size of the cross-sectional area ratio and the resin coating strength. However, the difference in melting point between the reinforcing fiber and the coating resin must be large, and it is essential that the coating resin is thermoplastic. Needless to say, special equipment is required.

[0003] Japanese Patent Publication No. 7-6140 discloses that a vinyl chloride sol containing a heating foaming agent is applied to a fiber net having an opening area of 0.3 cm ² or more for the purpose of preventing carpet from slipping, and then foamed. There is disclosed a technique of laminating a backed latex compound surface to prevent pile removal.

Further, Japanese Patent Publication No. 3-36956 discloses that
Disclosure of the technology discloses a coarse woven base fabric and a ventilating sheet in which a yarn constituting the base fabric is coated with a polymer foam having a melting point of 5 ° C. or less from the melting point or thermal decomposition point of the yarn. Have been.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reinforcing material to be laid to prevent the embankment from collapsing, so as to prevent the reinforcing material from being damaged by being sandwiched between stones and rocks in the soil.

[0006]

Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive studies. As a result, instead of simply increasing the thickness of the resin to improve the impact resistance, the resin has a cushioning property. The present inventors have found that it is effective to alleviate the impact by imparting them and improve the impact resistance, and have reached the present invention.

That is, the present invention has the following configuration. (1) A fibrous resin-coated structure comprising at least one kind of resin and at least one kind of fiber as components, wherein the weight ratio of resin / fiber is 0.2 to 20, and the formula (I) )
(2) a fiber-shaped resin-coated structure according to (1), which is in a mesh-like, net-like or lattice-like form. (3) The fiber resin-coated structure according to (1) or (2), wherein a synthetic fiber is used as the fiber.

[0008]

(Equation 2)

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The resin constituting the fiber resin-coated structure of the present invention is not particularly limited, and may be a thermoplastic resin or a thermosetting resin. Polyvinyl chloride resin, polyurethane resin, acrylic resin and the like are preferable from the viewpoint of foamability. The dispersion may be solvent-based dispersion, emulsion dispersion, or water dispersion. The application method may be any of a dipping method, a coating method, a laminating method, and a spraying method, and is not particularly limited. Further, two or more kinds of resins may be used.

The resin to be foamed may be applied first or later. Both may be foamed. In the dipping method, the resin may be squeezed with a mangle or the like after application, or may be applied without being squeezed.

The foaming method is not particularly limited.
For example, a foaming agent that starts foaming at a constant temperature may be added, or a method of directly blowing gas may be used. Further, a material other than the foaming agent, for example, a filler such as calcium carbonate and a colorant, a flame retardant, a weather resistance improver, and a conductive agent may be added to the resin.

The fibers constituting the resin-coated structure of the present invention are preferably synthetic fibers that are resistant to biodegradability and maintain high strength. Specifically, polyester fibers, polyacid fibers, vinylon, and the like can be given.

The fiber resin-coated structure of the present invention is particularly preferably in the form of a mesh, a net or a lattice in view of the interlocking effect. In other words, if a sheet or cloth or the like having no holes is laid in the soil, the upper and lower soils are separated by the sheet or cloth, and the soil slides on the sheet surface, making it difficult to become a reinforcing material. Therefore, it is important that the soil is connected through the holes. In addition, these production methods are not particularly limited, and methods other than general production methods such as a knitting method and a weaving method are also possible. It does not depend on the size of the eye.

The fiber / resin-coated structure of the present invention is required to have a resin / fiber weight ratio of 0.2 to 20. If the above value is less than 0.2, even if it is a foamed resin, the fiber coating is insufficient, and the object is not achieved. Also, 2
If it exceeds 0, there is basically no problem in terms of performance, but it is not preferable in terms of handling due to an increase in weight. It is preferably from 0.3 to 10, more preferably from 0.5 to 5.

The expansion ratio of the resin-coated structure of the present invention is required to be 1.05 to 50. If the expansion ratio is less than 1.05, there is no effect on the impact resistance due to foaming,
On the other hand, if it exceeds 50, there is basically no problem in performance, but it becomes bulky and disadvantageous in transportation and the like. Preferably from 1.5 to 40, more preferably from 3.0 to 30
It is.

[0016]

The present invention will be described below in detail with reference to examples. The present invention is not particularly limited by the examples.

(Example 1) A warp-knitted grid net having a pitch of 17 mm was obtained using a polyester multifilament. A vinyl chloride emulsion resin obtained by adding a foaming agent having a foaming function to the net by heating is applied to the net by dipping,
To obtain a foamed resin-coated net. The resin / fiber weight ratio in the foamed resin-coated net was 0.54, and the expansion ratio was 4 times.

Example 2 In the same manner as in Example 1, a vinyl chloride emulsion resin from which the amount of the foaming agent was significantly reduced was dipped to obtain a low foaming resin-coated net. The resin / fiber weight ratio in the foamed resin-coated net was 0.55, and the expansion ratio was 1.05.

Example 3 A vinyl chloride emulsion resin was dipped in the same manner as in Example 1 except that the resin did not pass through a mangle and was dipped to obtain a highly foamed resin-coated net. The resin in the foamed resin-coated net /
The weight ratio of the fibers was 1.0, and the expansion ratio was 8 times.

(Example 4) Same as Example 3, except that a vinyl chloride emulsion resin in which the amount of a foaming agent is greatly increased is increased to 15,000 to 20,000 cps, and the dip is left without passing through a mangle. To obtain a highly foamed resin-coated net. The resin / fiber weight ratio in the foamed resin-coated net was 3.0, and the expansion ratio was 18 times.

Comparative Example 1 A vinyl chloride emulsion resin was applied to the warp-knitted grid nets used in Examples 1 to 3 by dipping under a high-pressure mangle, dried and cured, and the weight of resin / fiber The ratio was 0.2 and the expansion ratio was 1.

As a method of evaluating the impact resistance of the foamed resin-coated nets obtained in Examples 1 to 4 and Comparative Example 1, each evaluation sample was placed on a thick steel plate, and a 40 mm under crushed stone having a thickness of 10 cm was placed thereon. Lay it on. Next, own weight about 100k
After rolling for 20 seconds with a g rammer (treading machine), the sample was dug and the residual strength was compared with that before rolling to determine the strength retention. The results are shown in Table 1.

[0023]

[Table 1]

From the above measurement results, in the case of Comparative Example 1 in which the resin adhesion amount is small, the fiber surface is easily damaged by the sharp corners of the crushed stone. By applying a certain amount of resin and swelling it with a foaming agent, fiber surface damage due to the crushed stone horns under pressure is reduced.

[0025]

As described above, the impact resistance of the fiber resin-coated structure of the present invention is improved by having a specific range of expansion ratio. Further, it is possible to prevent damage by stones and rocks in the soil, and it is suitably used particularly in the field of civil engineering.

[Brief description of the drawings]

FIG. 1 is a view showing one example of a fiber resin-coated structure of the present invention.

[Explanation of symbols]

 1 Textile resin-coated structure 2 Coated foam resin

Claims (3)

[Claims] 1. A fibrous resin-coated structure comprising at least one kind of resin and at least one kind of fiber at least as constituents, wherein the weight ratio of resin / fiber is 0.2 to 20, and
A resin-coated structure made of fiber, wherein the expansion ratio represented by the formula (I) is 1.05 to 50. (Equation 1) 2. The fibrous resin-coated structure according to claim 1, which is in the form of a mesh, a net or a lattice. 3. The fiber-coated structure according to claim 1, wherein synthetic fibers are used as the fibers.