JP2007321060A - Coated fiber-reinforced synthetic resin linear material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coated fiber-reinforced synthetic resin linear material ensuring easiness of production and reducing dispersion of performances by regularly arranging organic fibers and inorganic fibers. <P>SOLUTION: The fiber-reinforced synthetic resin linear material 10 comprises reinforcing fibers 12 on the core side composed of the inorganic fibers, reinforcing fibers 14 on the sheath side composed of the organic fibers, a matrix resin 16 interposed between the inorganic fibers and the organic fibers and an outer peripheral coating layer 18. The reinforcing fibers 12 on the core side can be composed of glass fibers and the reinforcing fibers 14 on the sheath side are arranged in a nearly true circular shape on the outer periphery thereof. The reinforcing fibers 14 on the sheath side are composed of the organic fibers such as a polyester. The reinforcing fibers 12 on the core side and the reinforcing fibers 14 on the sheath side are impregnated with the matrix resin 16 which is composed of a thermosetting resin. The outer periphery coating layer 18 is formed so as to coat the outer periphery of the reinforcing fibers 14 on the sheath side and composed of a thermoplastic resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a coated fiber reinforced synthetic resin linear material, and in particular, reduces variation in performance of a coated fiber reinforced synthetic resin linear material used as a tensile body such as an optical fiber cable, and is easy to make inexpensive. It relates to technology that can be manufactured.

  Conventionally, a tension member of a coated fiber-reinforced synthetic resin wire used for an optical fiber cable or the like has been conventionally made of glass fiber alone or aramid fiber alone. The fiber-reinforced synthetic resin coated fiber with glass fiber as the reinforcing fiber has no problem as a tension member in terms of tensile strength and tensile modulus, but the minimum bending diameter (when the tension member is bent on an arc, There was a drawback that the diameter of the limit of destruction) was large.

On the other hand, the coated fiber reinforced synthetic resin linear material using aramid fiber as the reinforcing fiber has the same tensile strength and tensile modulus as the excess quality, and the minimum bending diameter is more than that of the coated glass fiber reinforced resin linear material. However, aramid fibers have a drawback that they are very expensive fibers.
Therefore, Patent Document 1 proposes a coated fiber-reinforced resin linear material using inorganic fibers such as glass fibers and organic fibers such as aramid fibers in combination as reinforcing fibers. Although the coated fiber-reinforced synthetic resin linear material proposed in Patent Document 1 is expected to be manufactured at a relatively low price while maintaining high performance, there are also technical problems described below. It was.
JP2005-281441

  That is, the coated fiber reinforced composite resin linear material proposed in Patent Document 1 has a large minimum bend because inorganic fibers and organic fibers are irregularly arranged, and the inorganic fibers and organic fibers There is a disadvantage in that the uneven distribution (variation or unevenness) is large and the variation in performance becomes large.

  The present invention has been made in view of such conventional problems, and the object of the present invention is to ensure the ease of manufacturing by regularly arranging organic fibers and inorganic fibers. And it is providing the fiber-reinforced synthetic resin linear material with a coating | cover which can make the dispersion | variation in performance small.

  To achieve the above object, the present invention provides a core-side reinforcing fiber made of inorganic fibers, a sheath-side reinforcing fiber made of organic fibers, a matrix resin interposed between the inorganic fibers and the organic fibers, A coated fiber-reinforced synthetic resin linear object including an outer periphery covering layer covering an outer periphery of the sheath side reinforcing fiber, wherein the sheath side reinforcing fiber is disposed around the core side reinforcing fiber on the outer periphery of the core side reinforcing fiber. It was arranged in a perfect circle so as to surround.

  According to the coated fiber-reinforced synthetic resin linear material configured as described above, the sheath-side reinforcing fiber is arranged in a perfect circle around the core-side reinforcing fiber so as to surround the core-side reinforcing fiber. Therefore, uneven distribution of inorganic fibers and organic fibers is eliminated, and the variation in performance becomes very small. Further, since the sheath side reinforcing fibers are arranged in a perfect circle on the outer periphery of the core side reinforcing fibers, the manufacturing can be easily performed.

The core side reinforcing fiber can be made of glass fiber.
The sheath side reinforcing fiber can be composed of an organic fiber such as polyester.
The matrix resin can be composed of a thermosetting resin.

  The coated fiber-reinforced synthetic resin linear material may have a minimum bending diameter of 6 mm or less and a uniformity.

  The coated fiber-reinforced synthetic resin linear material may have a diameter of 1 mm or less and uniformity.

  In the coated fiber-reinforced synthetic resin linear object, the core-side reinforcing fiber, the sheath-side reinforcing fiber, and the outer peripheral covering layer are arranged in the same circular shape, and the flatness (roundness) is , 7% or less (93% or more).

  In the coated fiber reinforced synthetic resin linear article, the core side reinforcing fiber, the sheath side reinforcing fiber, and the outer peripheral covering layer are arranged in the same circle shape, and the characteristics against heat shrinkage are made uniform. Can do.

  In the coated fiber-reinforced synthetic resin linear object, the core-side reinforcing fiber, the sheath-side reinforcing fiber, and the outer peripheral covering layer are arranged in the same circle, and the matrix resin and the outer peripheral covering layer The adhesion between the two can be 8 kg / 10 mm or more.

  According to the coated fiber-reinforced synthetic resin linear material according to the present invention, by arranging organic fibers and inorganic fibers regularly, it is possible to ensure the ease of manufacturing and reduce the variation in performance. it can.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a coated fiber-reinforced synthetic resin wire according to the present invention. FIG. 1 is a longitudinal sectional view of a fiber reinforced synthetic resin linear object. The linear object 10 includes a core side reinforcing fiber 12 made of inorganic fibers, a sheath side reinforcing fiber 14 made of organic fibers, inorganic fibers and organic fibers. A matrix resin 16 interposed between the fibers and an outer peripheral coating layer 18 are included.

  The core side reinforcing fiber 12 can be composed of glass fiber. In the case of the present embodiment, the core side reinforcing fiber 12 is arranged at the center of the cross section of the linear object 10, and the outer shape is formed in a substantially circular shape. Has been.

  The sheath side reinforcing fiber 14 is disposed on the outer periphery of the core side reinforcing fiber 12 so as to surround the core side reinforcing fiber 12, and the outer shape thereof is formed in a substantially perfect circle shape. The sheath side reinforcing fiber 14 is made of an organic fiber such as polyester having a single yarn diameter larger than that of the glass fiber.

  The matrix resin 16 is impregnated into the core side reinforcing fiber 12 and the sheath side reinforcing fiber 14 and is made of a thermosetting resin. The outer periphery covering layer 18 is formed so as to cover the outer periphery of the sheath side reinforcing fiber 14 and is made of a thermoplastic resin.

  It is desirable that the coated fiber-reinforced synthetic resin linear material 10 of the present embodiment has a minimum bending diameter of 6 mm or less and has uniformity. Moreover, the fiber-reinforced synthetic resin linear article 10 with a coating | coated can be comprised so that a diameter may be 1 mm or less and it has uniformity.

  Furthermore, the coated fiber-reinforced synthetic resin linear article 10 includes a core-side reinforcing fiber 12, a sheath-side reinforcing fiber 14, and an outer peripheral covering layer 18 arranged in the same circular shape, and its flatness (roundness ratio) ) Can be 7% or less (93% or more).

  In addition, the coated fiber reinforced synthetic resin linear article 10 has the core side reinforcing fiber 12, the sheath side reinforcing fiber 14, and the outer peripheral covering layer 18 arranged in the same circular shape, and has uniform characteristics against heat shrinkage. can do.

  Furthermore, the coated fiber reinforced synthetic resin linear article 10 includes a core side reinforcing fiber 12, a sheath side reinforcing fiber 14, and an outer peripheral covering layer 18 arranged in a perfect circle, and the matrix resin 16 and the outer peripheral covering. The adhesive force between the layers 18 can be 8 kg / 10 mm or more.

  In the present invention, the technical significance of providing the outer peripheral coating layer 18 is based on the following reason. That is, when the outer peripheral coating layer 18 is not provided on the fiber reinforced resin linear article 10, normally, when the cable is formed in the next step, there is, for example, a PE resin coating step on the outer periphery. It is essential to bond and integrate them. Here, if the linear object 10 is uncoated, PE coating must be performed in two steps. In addition, if expansion / contraction in the environment is considered, if the coating is provided, an expansion / contraction relaxation effect can be expected.

  By setting the matrix resin 16 to an appropriate content, the minimum bending becomes favorable in terms of physical properties. Therefore, it is desirable to reduce the amount of the matrix resin as much as possible. Since excess matrix resin 16 affects the minimum bending properties, excess matrix resin is eliminated.

  According to the coated fiber-reinforced synthetic resin linear article 10 configured as described above, since the sheath-side reinforcing fibers 14 are arranged in a perfect circle on the outer periphery of the core-side reinforcing fibers 12, inorganic fibers and organic The uneven distribution with the fibers is eliminated, and the variation in performance becomes very small. As a result, it contributes to the shrinkage rate due to heat and the stability of the sample shape after heat treatment.

  In addition, since the absolute value and variation of the minimum bending are small if the shape is a perfect circle, the standard deviation value is also small. In the case of a non-circular shape, the minimum bending absolute value and the standard deviation value are large. Furthermore, since the sheath side reinforcing fibers 14 are arranged in a perfect circle on the outer periphery of the core side reinforcing fibers 12, the manufacturing can be easily performed.

  Hereinafter, more specific examples will be described.

[Specific Example 1]
The core side reinforcing fiber 12 is made of glass fiber (trade name: E glass, ECE225 = 7 μm) manufactured by Nitto Boseki Co., and the sheath side reinforcing fiber 14 is polyester manufactured by Teijin Techno Products Co., Ltd. Fiber (trade name: N300H, 280T48) was used. LLDPE (C4 type, MFR = 2.0) was used as the resin for forming the outer peripheral coating layer 18.

  Pull out glass fiber and polyester fiber from multiple creel stands, use glass fiber on the core side and polyester fiber on the sheath side so that the polyester fiber wraps around the glass fiber, but each fiber is in a separate guide Then, it was immersed in a matrix resin in an impregnation tank, and drawn into a predetermined shape by a multistage drawing nozzle to remove excess matrix resin.

  Further, when pulling out the polyester fiber on the sheath side from the stand, a tension of 0.3 g per denier was applied. The glass fibers and the polyester fibers are converged immediately before the coating step after the glass fibers are separately passed through the core side and the polyester fibers are separately passed through the multi-stage squeezing nozzle.

  After shaping to a diameter of about 0.5φ mm, the LLDPE resin was extrusion coated with an extruder, and the inside of a 150 ° C. steam curing tank (about 12 m) was guided at a speed of 10 m / min to cure the resin composition. Pass through the nozzle (approx. Φ0.8mm) heated to 240 ° C in order to make the coated fiber-reinforced resin linear material after curing into a perfect circle, remove excess LLDPE and pass between the caterpillars. It wound up with the take-up device.

  The cross-sectional shape of the obtained coated fiber-reinforced resin linear material is shown in FIG. The cross section of the linear object had a three-layer perfect circle structure because the LLDPE of the coating resin layer was also perfectly round. The glass fiber content of the core was about 20% by volume, and the organic fiber content on the sheath side was about 40% by volume.

[Comparative Example 1]
The core side reinforcing fiber 12 is made of glass fiber (trade name: E glass, ECE225 = 7 μm) manufactured by Nitto Boseki Co., and the sheath side reinforcing fiber 14 is polyester manufactured by Teijin Techno Products Co., Ltd. Fiber (trade name: N300H, 280T48) was used. LLDPE (C4 type, MFR = 2.0) was used as the resin for forming the outer peripheral coating layer 18.

  Pull out glass fiber and polyester fiber from multiple creel stands, use glass fiber on the core side and polyester fiber on the sheath side so that the polyester fiber wraps around the glass fiber, but each fiber is in a separate guide Passing through and immersing in the matrix resin of the impregnation tank, the glass fiber (core side) and the polyester fiber (sheath side) are converged with the first-stage squeeze nozzle, and the linear material is drawn into a predetermined shape, and excess matrix resin Was removed.

  After passing through the final squeezing nozzle (φ0.5mm), LLDPE resin is extrusion coated with an extruder, and the inside of a 150 ° C steam curing tank (about 12m) is guided at a speed of 10m / min to cure the resin composition. I let you. Pass through the nozzle (approx. Φ0.8mm) heated to 240 ° C in order to make the coated fiber-reinforced resin linear material after curing into a perfect circle, remove excess LLDPE and pass between the caterpillars. It wound up with the take-up device.

  FIG. 2 shows a cross-sectional shape of the obtained coated fiber-reinforced resin linear material. As is clear from the figure, the glass fibers on the core side were not surrounded by the sheath side polyester fibers, and these were not arranged in a concentric shape.

  Further, the glass fiber on the core side and the polyester fiber on the sheath side were unevenly distributed from the center of the cross section to the outer peripheral side. The glass fiber content of the linear product was about 20% by volume, and the organic fiber content on the sheath side was about 40% by volume.

[Example 2]
The core side reinforcing fiber 12 is made of glass fiber (trade name: E glass, ECE225) manufactured by Nitto Boseki Co., and the sheath side reinforcing fiber 14 is polyester fiber (manufactured by Teijin Techno Products Co., Ltd.). Trade name: N303H, 280T24) was used. The number of filaments of the polyester fiber is halved from 48f to 24f. The other processes from drawing to winding were performed in the same manner as in Example 1.

[Comparative Example 2]
The core side reinforcing fiber 12 is made of glass fiber (trade name: E glass, ECE225) manufactured by Nitto Boseki Co., and the sheath side reinforcing fiber 14 is polyester fiber (manufactured by Teijin Techno Products Co., Ltd.). Trade name: N303H, 280T24) was used. The number of filaments of the polyester fiber is halved from 48f to 24f. The other processes from drawing to winding were performed in the same manner as in Comparative Example 1.

  FIG. 3 shows a cross-sectional shape of the obtained coated fiber-reinforced resin linear material. As is apparent from the figure, the core-side glass fiber and the sheath-side polyester fiber were almost located at the center of the cross section, but the core-side glass fiber was surrounded by the sheath-side polyester fiber. However, a part of the glass fiber on the core side protruded outside the polyester fiber on the sheath side.

  Table 1 above summarizes the physical properties of the linear materials obtained in the specific examples and comparative examples described above. In specific examples 1 and 2, the FRP flatness ratio (%, roundness) is 6.2 (93.8) or 5.3 (94.2), but in comparative examples 1 and 2, 15.0 (85.0), 16.2 (83.8). Further, in specific examples 1 and 2, the minimum bending diameter (mm) is 6 mm or less or 4 mm or less, but in comparative examples 1 and 2, it is very large as 6 to 12 mm.

  Further, the thermal shrinkage rate (%) is 0.05 to 0.03 in the specific examples 1 and 2, whereas it is 0.18 and 0.2 in the comparative examples 1 and 2, The difference was very large, and the sample state after the heat treatment was stable in Examples 1 and 2, and it was confirmed that the thermal characteristics were particularly excellent.

  According to the coated fiber-reinforced synthetic resin linear material according to the present invention, by arranging organic fibers and inorganic fibers regularly, it is possible to ensure the ease of manufacturing and reduce the variation in performance. Therefore, it can be effectively used as a tensile body of an optical fiber cable.

It is a section explanatory view showing one example of a fiber reinforced synthetic resin linear article with a covering concerning the present invention. It is sectional explanatory drawing which shows an example of the fiber-reinforced synthetic resin linear material with a coating of the comparative example of this invention. It is sectional explanatory drawing which shows the fiber reinforced synthetic resin linear material with a coating of the other comparative example of this invention. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Covered fiber reinforced synthetic resin linear material 12 Core side reinforcing fiber 14 Sheath side reinforcing fiber 16 Matrix resin 18 Outer peripheral coating layer

Claims (9)

A core side reinforcing fiber made of an inorganic fiber, a sheath side reinforcing fiber made of an organic fiber, a matrix resin interposed between the inorganic fiber and the organic fiber, and an outer peripheral covering layer covering an outer periphery of the sheath side reinforcing fiber; A coated fiber-reinforced synthetic resin linear material comprising
A sheathed fiber reinforced synthetic resin wire, wherein the sheath side reinforcing fiber is arranged in a perfect circle around the core side reinforcing fiber so as to surround the core side reinforcing fiber. object.   2. The coated fiber-reinforced synthetic resin wire according to claim 1, wherein the core-side reinforcing fiber is a glass fiber.   The coated fiber-reinforced synthetic resin wire according to claim 1, wherein the sheath-side reinforcing fibers are organic fibers such as polyester.   The coated fiber-reinforced synthetic resin wire according to claim 1, wherein the matrix resin is a thermosetting resin.   The coated fiber-reinforced synthetic resin wire according to any one of claims 1 to 4, wherein the coated fiber-reinforced synthetic resin wire has a minimum bending diameter of 6 mm or less and has uniformity. State.   The coated fiber-reinforced synthetic resin linear product according to any one of claims 1 to 4, wherein the coated fiber-reinforced synthetic resin linear product has a diameter of 1 mm or less and has uniformity. .   In the coated fiber-reinforced synthetic resin linear object, the core-side reinforcing fiber, the sheath-side reinforcing fiber, and the outer peripheral covering layer are arranged in the same circular shape, and the flatness (roundness) is 7% or less (93% or more). The coated fiber-reinforced synthetic resin linear product according to any one of claims 1 to 6.   In the coated fiber reinforced synthetic resin linear article, the core side reinforcing fiber, the sheath side reinforcing fiber, and the outer peripheral covering layer are arranged in the same circle shape, and the characteristics against heat shrinkage are made uniform. The coated fiber-reinforced synthetic resin wire according to claim 7.   In the coated fiber-reinforced synthetic resin linear object, the core-side reinforcing fiber, the sheath-side reinforcing fiber, and the outer peripheral covering layer are arranged in the same circle, and the matrix resin and the outer peripheral covering layer The coated fiber-reinforced synthetic resin linear product according to claim 7, wherein the adhesion between the two is 8 kg / 10 mm or more.

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