JP2904608B2 - Fiber composite rain gutter and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber composite rain gutter and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, rain gutters are generally made of extruded hard vinyl chloride. However, hard vinyl chloride has a large coefficient of linear expansion of 7.0 × 10 ⁻⁵ (1 / ° C.), and therefore has a thermal expansion and contraction. Is big. Therefore, if a rigid PVC gutter is attached to the building together with the joint, the rain gutter will thermally expand and contract and fall out of the joint due to changes in the temperature in the four seasons and the temperature difference between day and night, and thermal deformation will occur, resulting in cracking. As a result, there is a possibility that the function as a rain gutter cannot be achieved.

[0003] Therefore, as a rain gutter supplementing the above-mentioned disadvantages,
(A) A core material made of a metal plate coated on both sides with a thermoplastic resin by extrusion molding (see JP-A-57-33660), or (B) A fibrous base material is impregnated with rubber, synthetic resin, or the like. A core material in which both inner and outer surfaces are coated with a thermoplastic resin by extrusion molding has been proposed (see Japanese Utility Model Publication No. 62-42019).

[0004]

In the case of the rain gutter of the above (a), separation occurs due to stress concentration or the like due to temperature change at each interface between the metal plate core material and the inner / outer coating synthetic resin, and deformation due to heat storage occurs. In addition, there is a problem of corrosion and delamination due to penetration of rainwater from the cut surface into the interface.

In the case of the rain gutter (b), if the amount of fibers is increased in order to reduce thermal expansion and contraction, the core becomes brittle, and the core cracks and delaminations occur due to impact.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fiber composite rain gutter which is free from problems of delamination and corrosion, has low thermal expansion and contraction, has high heat resistance and high rigidity, and a method for continuously producing the same.

[0007]

A fiber composite rain gutter according to the present invention comprises a gutter-shaped fiber-reinforced crosslinked vinyl chloride resin core material, and a vinyl chloride resin layer laminated on both inner and outer surfaces of the core material. It is characterized by comprising.

According to a second aspect of the present invention, there is provided a method for producing a fiber composite rain gutter, wherein a plurality of continuous reinforcing fibers are passed through a fluidized bed of a powdery vinyl chloride resin containing a cross-linking component to cross-link each reinforcing fiber. After adhering the powdery vinyl chloride resin containing the components, the mixture is heated to form a prepreg sheet, the prepreg sheet is shaped into a gutter at a temperature above its softening point, and then the crosslinking reaction is completed. A gutter-shaped core material is drawn into a crosshead die, and a vinyl chloride resin is laminated on both inner and outer surfaces.

Specific examples of the reinforcing fibers include inorganic fibers such as glass, carbon and ceramic, and organic fibers such as aramid, vinylon and polyester.

As the crosslinking component, those conventionally known as crosslinking agents for vinyl chloride resins can be used, and examples thereof include compounds containing sulfur and nitrogen and polyfunctional (meth) acrylic monomers. , Triazine,
Thiol-based cross-linking agents are suitable, and the amount of these added to 100 parts by weight of vinyl chloride resin is usually 0.1 to 1%.
0 parts by weight, preferably 0.5 to 2 parts by weight.

As a method of completing the crosslinking reaction, there is a method of performing thermal crosslinking through a heating furnace, irradiation of ionizing radiation, UV irradiation, etc., and a catalyst such as a peroxide is appropriately added as needed. In addition, the crosslinking reaction may partially occur when the core material is heated and shaped into a gutter shape, but it must be completed before the gutter core material is finally drawn into the crosshead die. I just need.

The vinyl chloride resin laminated on the powdery vinyl chloride resin and the trough-shaped core material may optionally contain a stabilizer,
Lubricants, reinforcing agents, gelling accelerators and the like are added. Further, the polymerization degree is preferably 600 or more in view of the physical properties and weather resistance of the rain gutter to be produced.

[0013]

In the fiber composite rain gutter according to the present invention, the core material is a gutter-shaped fiber-reinforced crosslinked vinyl chloride resin, and the layers laminated on both the inner and outer surfaces of the core material are vinyl chloride resins. Join. Further, since the core material is a fiber-reinforced crosslinked vinyl chloride resin, it has low thermal expansion and contraction, high heat deformation temperature and glass transition temperature, excellent heat resistance, and high rigidity.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

A fiber composite rain gutter (1) according to the first aspect of the present invention shown in FIG. 1 is a gutter-shaped fiber-reinforced crosslinked vinyl chloride resin core material.
(2) and a vinyl chloride resin layer (3) laminated on both the inner and outer surfaces of the core material (2).

An embodiment of the method of manufacturing the fiber composite rain gutter will be described below.

Embodiment 1 As shown in FIG. 2, a large number of continuous reinforcing fibers (5) from a large number of bobbins (4) are guided to a fluidized bed apparatus (7) by a plurality of guide rolls (6), and are crosslinked. After passing through the fluidized bed (8) of the powdered vinyl chloride resin containing the component and adhering the powdered vinyl chloride resin containing the crosslinking component to each reinforcing fiber (5), a pair of heating and pressing rolls A prepreg sheet (10) is formed by heating and pressing according to (9), and the prepreg sheet (10) is wound around a winding machine (12) by a pair of winding rolls (11).

As the reinforcing fiber (5), glass roving is used, and the fiber is opened before being introduced into the fluidized bed apparatus (7).

As a cross-linking component, a triazine thiol-based cross-linking agent is used, and 0.5 part by weight is added together with 2 parts by weight of a tin-based stabilizer to 100 parts by weight of a powdery vinyl chloride resin having a particle size of 150 μm. Fluidized bed
(8)

The thickness of the prepreg sheet (10) is 0.5 m
m, the width was 400 mm, and the glass content was 30% by volume.

As shown in FIG. 3, the prepreg sheet (1
(0) to a feeding machine (13), and the prepreg sheet (10) fed from the feeding machine (13) is heated by a shaping device (14) at 80 ° C. to form a gutter shape, and a gutter-shaped core material (2) Then, the mixture is passed through a heating furnace (15) at 150 ° C. to complete the crosslinking reaction. The prepreg sheet (10) may be directly guided to the shaping device (14) without transferring the prepreg sheet to the feeding machine (13). Next, the gutter-shaped core (2) is connected to the extruder (16) and the crosshead die (17)
And melted vinyl chloride resin under extrusion pressure
After laminating on both sides of (2), by sizing in a cooling sizing device (18), a vinyl chloride resin layer (3) is laminated on both the inner and outer surfaces of the core material (2) as shown in FIG. A rain gutter (1) having a thickness of 1.5 mm is continuously obtained and is taken out by a take-off machine (19). Crosshead die (17) has a total length of 2
4, the resin flow path (21) disposed on one side and the resin flow path (22) disposed on the other side through the core material path (20), as shown in FIG. Although positioned on the same line orthogonal to the core material passage (20), the length of the land portion (23) is determined according to the melt bonding property and defoaming property of the vinyl chloride resin. The mold temperature was 185 ° C., and the molding speed was 3 m / min.

Example 2 A rain gutter was produced in the same manner as in Example 1 except that 1 part by weight of a photoinitiator and a sensitizer was added to a powdery vinyl chloride resin, and the crosslinking reaction was completed by irradiation with ultraviolet rays. did.

With respect to Examples 1 and 2, the following comparative examples
The linear expansion coefficient, the heat deformation resistance, and the lateral bending elastic modulus were compared.

Comparative Example A gutter was manufactured in the same manner as in Example 1 except that the core material was a vinyl chloride resin, did not contain a crosslinking component, and was not crosslinked.

The obtained sample was cut into a length of 4 m and evaluated as follows.

1) Measurement of linear expansion coefficient The obtained sample was placed in a thermostatic chamber, the dimensions at 20 ° C. were measured, and then the temperature was raised to 60 ° C., and the dimensional change was measured. Was calculated.

2) Evaluation of thermal deformation The obtained sample was cut into a length of 20 cm, left in an oven at 80 ° C for 30 minutes, and observed for deformation.

3) Measurement of flexural modulus The obtained sample was cut into a size of 25 × 150 m,
The flexural modulus at 60 ° C. was measured according to JIS K6911.

[0029]

[Table 1]

The cross-linking of the core vinyl chloride resin was confirmed as follows.

Only the vinyl chloride resin component of the core coating layer of the crosslinkable gutter of the vinyl chloride resin is taken out, immersed in acetone (30 ° C., 2 hours), and the weight change after immersion is measured to determine the gel content. Rate and swelling ratio were measured.

Assuming that the initial weight is W ₁ , the swelling weight is W ₂ , and the weight after drying is W ₃ , the gel fraction is calculated as W ₁ / W ₃ × 100 (%) swelling ratio = W ₂ / W _3. . The results were as follows.

[0033]

[Table 2]

As is clear from the above results, the coefficient of linear expansion of the fiber composite rain gutter obtained by the production method of the present invention is in good agreement with the theoretical value, and is excellent in heat resistance and rigidity.

[0035]

According to the fiber composite rain gutter of the present invention, since the crosslinked vinyl chloride resin of the core material and the vinyl chloride resin laminated thereon are integrally joined, no delamination occurs and no corrosion occurs. No problem.

Further, since it has low thermal expansion and contraction and high heat resistance and rigidity, it has high durability as a rain gutter.

Further, according to the manufacturing method of the present invention, the above-mentioned excellent rain gutter can be manufactured continuously, so that the productivity is high.

[Brief description of the drawings]

FIG. 1 is a partial perspective sectional view of a fiber composite rain gutter according to the present invention.

FIG. 2 is a schematic side view showing a manufacturing process of a prepreg sheet in Example 1, in which only a fluidized bed apparatus has a vertical cross section.

FIG. 3 is a schematic side view showing a process of manufacturing a rain gutter from a prepreg sheet in the first embodiment.

FIG. 4 is an enlarged sectional view showing a state in which a vinyl chloride resin is laminated on a core material by a crosshead die.

[Explanation of symbols]

 (1) Rain gutter (2) Fiber reinforced cross-linked vinyl chloride resin core material (3) Vinyl chloride resin layer (5) Reinforced fiber (8) Fluidized bed (10) Pre-preg sheet (17) Crosshead die

Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B29K 105: 10 B29L 31:10

Claims (2)

(57) [Claims] 1. A fiber composite rain gutter comprising a gutter-shaped fiber-reinforced crosslinked vinyl chloride resin core material and vinyl chloride resin layers laminated on both inner and outer surfaces of the core material. 2. Passing a large number of continuous reinforcing fibers through a fluidized bed of a powdery vinyl chloride resin containing a crosslinking component,
After attaching a powdery vinyl chloride resin containing a cross-linking component to each reinforcing fiber, heating to form a prepreg sheet,
After the prepreg sheet is formed in a gutter shape at a temperature higher than its softening point, the crosslinking reaction is completed to form a gutter core material, and the gutter core material is drawn into a crosshead die, and vinyl chloride resin is applied to both the inner and outer surfaces. A method for producing a fiber composite rain gutter, comprising laminating.