JP6478580B2 - Anti-pollution membrane curtain material - Google Patents

Description

  The present invention relates to a material used for a pollution control film.

  In some cases, the construction area is surrounded by a pollution prevention film for the purpose of preventing the diffusion of pollution caused by marine and underwater work.

  The pollution control film generally includes a weight installed on the seabed, a curtain having a lower end attached to the weight, and a float attached to the upper end of the curtain. It is independent.

  Fabrics made of polyester multifilament yarn are used as curtains for the pollution control film. However, when the curtain is rubbed on a reef or the like due to waves, tides, etc., the polyester multifilament single yarn constituting the fabric is worn and broken, and the phenomenon expands and the hole opens and breaks in a short time. May occur.

  If the curtain of the pollution control film is torn and a hole is opened, the contaminants diffuse from the hole to the outside and the effect of the pollution prevention film is reduced.

  Therefore, for example, Patent Document 1 discloses a method capable of easily repairing a damaged anti-pollution film curtain.

JP 2014-31676 A

  The present invention is a curtain material for a pollution control film, and when used as the curtain, even if the curtain is rubbed on a reef or the like due to ocean waves, tides, etc., a hole is opened in a short period of time due to wear. It is an object to provide a sheet-like material that does not occur.

In order to achieve this object, the curtain material of the pollution control film of the present invention is constituted by a warp double woven fabric woven with warp and weft yarns, and the warp yarn is a core-sheath composite filament. The core-sheath composite multifilament is composed of a polyester multifilament in which the weft yarn is composed of a single-phase polyester filament, and each core-sheath composite filament is formed of a high-melting polyester as a core component. The sheath component is formed of a low-melting polyester having a melting point lower than that of the high-melting polyester, the warp yarn is exposed on both front and back surfaces of the fabric, and the weft yarn is embedded in the fabric, are integrated is warp each other in terms of core-sheath composite filaments is integrated by melting and solidification of the low-melting polyester component, or Wherein the by these integrated in which leakage of polluted is prevented.

The curtain material of the present invention is preferably a warp double weave twill double woven fabric.

According to the material for curtains of the pollution control film of the present invention, the core-sheath composite multifilament, the warp yarn is composed of a fabric woven with warp yarn and weft yarn, and the warp yarn is composed of the core-sheath composite filament. By weaving with polyester multifilaments composed of single-phase polyester filaments, it is possible to provide wear resistance by the core-sheath composite filament of warp yarn, and the fabric of the fabric by the single-phase polyester filament of weft yarn Therefore, a civil engineering material having sufficient strength and wear resistance can be obtained.

In addition , according to the civil engineering material of the present invention, the fabric is constituted by the vertical double weave, the core-sheath composite filament of the warp yarn is exposed on both the front and back surfaces of the fabric, and the single-phase polyester filament of the weft yarn is inside the fabric. The core / sheath composite filament of warp yarn excellent in abrasion resistance integrated by melting and solidification is exposed on the fabric surface and covered with a single-phase polyester filament of weft yarn excellent in strength. By preventing exposure to the surface of the fabric, it is possible to obtain a curtain material having a pollution control film that is particularly advantageous in terms of wear resistance while maintaining strength over a long period of time.

It is a textile organization chart of the material for curtains of the pollution control film of the example of the present invention. It is a figure which shows the cross-section of the curtain material of the pollution prevention film | membrane of FIG. It is a figure which shows the pollution prevention film | membrane as embodiment of this invention.

The material for curtains of the antifouling film of the present invention is composed of a cloth containing a core-sheath composite filament. In the core-sheath composite filament, the core component is formed of a high-melting polyester, and the sheath component is formed of a low-melting polyester having a melting point lower than that of the high-melting polyester. The core-sheath composite filaments are integrated with each other by melting and solidifying the low-melting polyester as the sheath component. Examples of the fabric include a woven fabric .

And it is comprised by the fabric woven by warp yarn and weft yarn, and the said warp yarn is the core-sheath composite multifilament comprised by the core-sheath composite filament .

  In the core-sheath composite filament, the melting point of the high-melting polyester as the core component is preferably 200 ° C. or more, the melting point of the low-melting polyester as the sheath component is less than 200 ° C., and the difference between the melting points is preferably 50 ° C. or more. In this case, only the sheath component is melted when the sheath component is melted and solidified, and the core component can be maintained without melting the core component.

  The core component of the core-sheath composite filament can be made to have a higher strength by being formed of a high-viscosity polyester having an intrinsic viscosity of about 0.6 to 1.0. As the high-viscosity polyester, polyethylene terephthalate (melting point: about 260 ° C.), polybutylene terephthalate (melting point: about 220 ° C.), polyethylene naphthalate (melting point: about 270 ° C.) and the like are suitable from the viewpoint of dimensional stability, and polyethylene terephthalate is cost effective. From this point, it is more preferable. A high-viscosity polyester may be added with a weathering agent, a flame retardant, a matting agent, etc. to such an extent that the stretchability and strength of the fiber are not impaired.

  The sheath component is preferably a copolyester having a lower melting point than the core component. Further, it is preferable that the core component is compatible with the core component so that separation from the core component hardly occurs when the fabric is subjected to friction or bending due to waves or the like. Specifically, for example, a copolyester composed of a terephthalic acid component, an aliphatic lactone component, an ethylene glycol component, and a 1,4 butadiene component can be mentioned. Since such a copolyester has a crystalline melting point, heat treatment for heat fusion can be stably performed. Further, the obtained fabric has heat resistance, and therefore has an advantage that deformation due to frictional heat during transportation and work hardly occurs. The copolyester of the sheath component may be added with a matting agent, an antibacterial agent, a flame retardant, a crystal nucleating agent, an antistatic agent, etc. to such an extent that the yarn-making property and thermal adhesiveness are not impaired.

  The mass ratio of the core component and the sheath component is arbitrary, but it is preferable that the core component: sheath component = 1: 1 to 5: 1. More preferably, it is 2: 1 to 3: 1. If the sheath component is less than this range, the thermal adhesive force due to melting and solidification becomes inferior, and if it exceeds this range, the proportion of the core component is reduced by that amount, making it difficult to obtain high strength.

  The core component and the sheath component may contain a pigment. The type of pigment can be selected depending on the application. For example, carbon black can be preferably used for improving weather resistance, a red or yellow pigment for conspicuous purposes, and a blue pigment for making water turbidity inconspicuous.

  The material for curtains of the antifouling film of the present invention has high hardness and excellent wear resistance because the core / sheath composite filaments are integrated by melting and solidifying the low melting point polyester as the sheath component. In addition, even when rubbed by the influence of waves and reefs, the core component that maintains the fiber form is protected by the sheath component, so there is little single yarn breakage, and thus the occurrence of perforation in the curtain is effectively prevented. Can be prevented. Further, it is preferable that the gap between the yarns of the fabric is as small as possible so that the small particulate contamination does not diffuse out of the antifouling film.

Thus, the material of the present invention can be suitably used for a curtain of a pollution control film that is often rubbed by the influence of waves and reefs. When the core-sheath composite filament is disposed on the warp yarn, only the core-sheath composite filament may be disposed, or may be disposed in combination with fibers other than the core-sheath composite filament. As a method to be used in combination, a method using a composite yarn of a core-sheath composite filament and another fiber, a method using a twisted yarn obtained by twisting a core-sheath composite filament yarn and a yarn made of another fiber, a core-sheath composite filament For example, a method of appropriately arranging a yarn made of yarn and a yarn made of another fiber may be used.

In the curtain material of the pollution control film of the present invention, the core sheath in which the warp yarn is integrated with each other by melting and solidifying the low melting point polyester as the sheath component in the fabric woven with the warp yarn and the weft yarn It is composed of a composite filament, and the weft is composed of a single-phase polyester filament . For this reason, compared with the case where the warp yarn and the weft yarn both include a core-sheath composite filament in which the low melting point polyester as the sheath component is melted and solidified, a single-phase polyester filament of the weft yarn is configured flexibly. Therefore, a sheet-like material having appropriate flexibility can be obtained. As a result, the material can be handled easily. In this case, it is possible to roll the material in the direction of the weft yarn, so that good handling properties based on this point can be expected, and compact storage properties when not in use can be expected. In practice, it is preferable that the warp yarn is in the form of a core-sheath composite multifilament, and the weft yarn is in the form of a single-phase polyester multifilament. However, it may be in the form of a monofilament. In addition, the warp yarn is composed of only the core-sheath composite filament and the yarn composed solely of the single-phase polyester filament, or alternately every several yarns, and the weft yarn is composed of the single-phase polyester filament. The woven fabric is preferably used in terms of handleability in consideration of roll winding. Although any polyester can be used as the polyester constituting the single-phase polyester filament of the weft yarn, it is preferably the same as the polyester of the core portion of the core-sheath composite filament.

The core-sheath composite filaments integrated with each other by melting and solidifying the low melting point polyester of the sheath component have a lower tensile strength in the fiber axis direction than before melting and solidifying. This is because by applying a temperature equal to or higher than the melting point of the sheath for melting, the molecular orientation of the sheath returns and does not contribute to the tensile strength. On the other hand, the single-phase polyester filament does not cause such a decrease in strength, and thus plays a role of taking a tensile strength in the fabric. Therefore, by using the core-sheath composite filament and the single-phase polyester filament, the desired excellent wear resistance by the core-sheath composite filament is exhibited, and the desired excellent strength by the single-phase polyester filament is exhibited, As a result, it is possible to obtain a curtain material for a pollution control film having both excellent wear resistance and strength .

The material for curtains of the antifouling film of the present invention , wherein the warp yarn is composed of core-sheath composite filaments integrated with each other by melting and solidifying low melting point polyester of the sheath component, and the weft yarn is composed of single-phase polyester filaments in order to improve the abrasion resistance, the exposed vertical yarn on both sides of the fabric, a structure in which the weft yarn is embedded in the fabric. Such a configuration is achieved by a vertical double weave structure. For example, it can be realized by a twill double-sided weave structure, and a 1/3 twill double-sided weave is preferable.

However, the woven structure of the vertical double weave is not limited to this. For example, plain weave, satin weave, etc. may be used, and a change structure obtained by mixing these weave structures may be used.

  Curtain material for anti-contamination membrane composed of fabric woven with warp and weft, core-sheath composite multifilament where warp yarn is composed of core-sheath composite filament, and weft yarn is single phase When producing a polyester multifilament composed of polyester filaments, the warp yarn and the weft yarn are prepared and woven. When the woven fabric is completed, it is heat-treated at a temperature not lower than the melting point of the low-melting polyester as the sheath component and not higher than the melting point of the high-melting polyester as the core component in the core-sheath composite filament. Then, the low melting point polyester of the sheath component is melted, and the core-sheath composite filaments are bonded to each other. At this time, the high melting point polyester of the core component does not melt, and therefore the fiber form of the core-sheath composite filament is maintained. When the temperature is lowered to normal temperature after finishing the heat treatment, the low melting point polyester of the sheath component is solidified, so that the core-sheath composite filaments are integrated.

  As described above, the material of the present invention can be suitably used for a curtain of a pollution prevention film. FIG. 3 shows a schematic configuration of the pollution prevention film. In FIG. 3, 1 is the seabed and 2 is the sea surface. The pollution prevention film 3 includes a weight 4 installed on the seabed 1, a float 5 that receives buoyancy of seawater, and a curtain 6 that has an upper end connected to the float 5 and a lower end connected to the weight 4. Due to the buoyancy that the float 5 receives from seawater, the curtain 6 is lifted and becomes independent. The material of the present invention is used for the curtain 6.

  With the pollution prevention film 3 having such a configuration, for example, dirt particles 7 such as earth and sand thrown into the sea at a planned landfill site can be dammed and allowed to sink. Seawater passes through the curtain 6.

Practical example 1
A core sheath in which the core component is a high-melting polyester (polyethylene terephthalate melting point 260 ° C.), the sheath component is a low-melting copolymer polyester (melting point 160 ° C.), and the core component: sheath component = 3: 1. A composite polyester multifilament, 1100 dt 96 fil was obtained and twisted. Further, four single-phase polyester multifilaments (melting point 260 ° C.) and 1100 dt192fil were twisted.

  The core-sheath composite polyester multifilament is used for warp yarn, and the twisted single-phase polyester multifilament is used for warp yarn. A living machine having 113 pieces / 吋, 14 pieces / 吋, and a weaving width of 225 cm was woven.

  In FIG. 1, 11 shown in black is a warp thread, and 12 shown in white is a weft thread. Of the warp yarn, the part marked with “◯” means that it is located on the surface side of the fabric shown in FIG. 1, and the part marked with “x” is shown in FIG. It means to be located on the back side of the represented fabric. FIG. 2 shows a longitudinal section of the living machine. However, in FIG. 2, only a part of the warp yarn 11 is drawn for easy understanding, and the whole warp yarn 11 is not drawn.

  Next, this living machine was heat-treated at 180 ° C. with a pin tenter.

  The fabric obtained through the above steps had a width of 210 cm, a weaving density of 121 warps / 吋, and 16 wefts / 吋. When the tensile strength of this fabric was measured by the labeled strip method of JIS-L-096, the vertical tensile strength was 5080 N / 3 cm and the horizontal tensile strength was 6500 N / 3 cm. A pollution control film curtain # 500 equivalent product was obtained.

Comparative Example 1
By using three twisted polyester multifilaments 1670dt192f for warp and weft, weaving with a known plain weave structure, the weaving density is 14 warps / 吋, 14 wefts / 吋, and the weaving width is 210cm. I got a living machine.

  About this raw machine, when the tensile strength was measured by the labeled strip method of JIS-L-096 similarly to Example 1, the vertical tensile strength was 6300 N / 3 cm and the horizontal tensile strength was 5300 N / 3 cm. A pollution control film curtain # 500 equivalent product was obtained.

  The curtain fabrics of Practical Example 1 and Comparative Example 1 were sewn, a weight was attached to the lower part, and a float was attached to the upper part, to create a self-supporting antifouling film for each span (length 20 m, depth 6 m). This self-supporting anti-pollution film was installed at a construction site where there were relatively many reefs and strong waves. As a result of confirming the progress, the self-supporting anti-pollution membrane using the curtain of Comparative Example 1 was used for two months, and the curtain was rubbed against the reef by waves, and a hole was opened, and the pollution leaked from the hole. The turbidity was diffused and the turbidity occurred. Therefore, the construction was interrupted and replaced with a pollution control film using the curtain of Example 1. The pollution control film using the curtain of this practical example 1 was free from leakage even after 3 months of use, and the turbidity of water outside the pollution prevention film could not be confirmed.

The abrasion resistance of the antifouling film curtains of Example 1 and Comparative Example 1 was evaluated. The test conditions are as follows.
Test conditions
Abrasion tester (Gakushin-type wear tester)
Load 500g
Sandpaper AA-40
Wear frequency 1000 round trips
Wear speed 30 reciprocations / minute
Size of test piece Vertical 15cm x Width 3cm

  When the test piece of Comparative Example 1 was observed at the time of 10 reciprocations, surface fluff due to wear had already started to appear, and when the number of wears further overlapped, a large amount of yarn waste was generated. The test piece at the end of the test is severely damaged, especially at the large damaged part, it is in a state where the size of 4 cm x 2 cm is lost and the shape is barely held only with the warp thread, and the sample table surface on the back is visible It was. On the other hand, the test piece of Example 1 had a slight rubbing trace on the surface, but was hardly damaged and was much more excellent in wear resistance than the test piece of Comparative Example 1. It was.

Claims (3)

It is composed of a warp double woven fabric woven with warp and weft yarns,
The fabric is woven with a core-sheath composite multifilament in which the warp yarn is constituted by a core-sheath composite filament, and a polyester multifilament in which the weft yarn is constituted by a single-phase polyester filament,
Each core-sheath composite filament constituting the core-sheath composite multifilament is formed of a low melting point polyester whose core component is formed of a high melting point polyester and whose sheath component is lower in melting point than the high melting point polyester,
The warp yarn is exposed on both the front and back sides of the fabric, and the weft yarn is embedded in the fabric.
By melting and solidifying the low melting point polyester of the sheath component , the core-sheath composite filaments are integrated with each other, and the warp yarns are integrated with each other, and the leakage of the contamination is prevented by the integration of these. A material for curtains for anti-pollution membranes.   2. The material for curtains of an antifouling film according to claim 1, wherein the warp double woven fabric is a twill double woven fabric. A curtain for a pollution control film comprising the pollution prevention film curtain material according to claim 1 or 2 and installed in water.

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