JPH03110136A - Production of continuous composite molding - Google Patents

Abstract

PURPOSE:To produce conveniently a continuous composite molding with good productivity, inexpensive installation cost, good handling workability and low cost by molding continuously a synthetic resin sheet with each specified thickness and elasticity, coating at least one face thereof with a photocurable unsatd. polyester resin soln. having adhesive properties with the sheet and curing it by irradiating it with a light. CONSTITUTION:A synthetic resin sheet 10 with a thickness of 100mum or larger and a tensile elasticity of 2X10<4>kg/cm<2> or larger is fed in a forming apparatus 50, wherein the sheet is bent and molded into e.g. a reverse U-shaped rain conduit shape. Then, the synthetic resin sheet 10 is sent to a coating apparatus 70 and one face or both faces thereof are coated with a photocurable unsatd. polyester resin. Then, a resin soln.-coated molded sheet is transferred to a light irradiation apparatus 80 and the photocurable unsatd. polyester resin soln. is cured by irradiating a light to prepare a continuous composite molding 90.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a long composite molded article such as an eaves gutter.

(Prior Art) Prepreg sheets made by impregnating glass fiber material with a photocurable unsaturated polyester resin liquid are widely used in the production of various composite molded bodies.

Examples of this type of prepreg sheet include PALAP
REG LH2 (manufactured by BASF) is a prepreg sheet like Kono, in which the resin is in an uncured state, which prevents the resin from flowing out and the monomer from evaporating, and also eliminates stickiness on the surface, making it easier to handle. For this purpose, a flexible releasable protective film such as a polyvinyl alcohol film is generally applied to both sides.

Then, usually, the prepreg sheet is heated and softened with the protective film still attached, formed into a desired shape using a forming mold such as a forming roll, and irradiated with light to harden the resin. Thereafter, the protective film is peeled off and removed to produce a long composite molded article such as a rain gutter.

In this case, the uncured prepreg sheet is held at both ends by clamps, etc., and supplied to the shaping mold or curing zone. Difficult to grasp.

Therefore, for example, in Japanese Patent Application Laid-open No. 62-19432,
A technique has been proposed in which only the end portion of the prepreg sheet to be gripped is hardened in advance to make it easier to grip with a clamp or the like.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional technology, there is a new method for pre-curing only the gripped end of the Bripreg sheet before supplying it to the shaping mold or the curing zone. This increases the number of edge hardening steps, which poses a problem in terms of productivity, equipment costs, etc. Further, the method using prepreg sheets as described above has the problem that they are soft, difficult to handle, and relatively expensive.

The present invention solves the above problems, and its purpose is to manufacture a long composite molded body in a cylindrical manner with high productivity and low equipment costs, and also with good handling and workability. The purpose is to provide a method.

(Means for Solving the Problems) The method for producing a long composite molded body of the present invention is characterized in that the long composite molded body has a thickness of 100 μm.
A synthetic resin sheet having the above properties and a tensile modulus of 2 x 104 kg/cm2 or more is continuously shaped, and at least one side of the synthetic resin sheet is coated with a photocurable unsaturated polyester resin liquid that is adhesive to the sheet. It is characterized by curing by irradiation with light, thereby achieving the above object.

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

In FIG. 1, 10 is a synthetic resin sheet, and this synthetic resin sheet 10 has a thickness of 100 μm or more and a tensile modulus of 2×10′ kg/c+fi or more.

As the synthetic resin sheet 10, a sheet that adheres well to a cured resin of a photocurable unsaturated polyester resin liquid, which will be described later, is used. In addition, the tensile modulus is ASTM D-63
This is a value measured according to 8.

As such a synthetic resin sheet 10, for example, PUT
and saturated polyester resin called PBT, PET
A sheet made of a special grade saturated polyester resin called "G" manufactured by Eastman Kodak Company in the United States, acrylic resin, etc., and having a thickness of about 100 to 1000 microns, is suitably used.

The synthetic resin sheet 10 described above is passed through a feed roll 30 and then sent to a preheating device 40. This preheating device 40 is provided to preheat the synthetic resin sheet 10 to make it easier to bend. However, the synthetic resin sheet 10 as described above is flexible and can be continuously bent and shaped into, for example, an inverted U-shaped eaves gutter at room temperature without preheating.
Preheating device 40 does not necessarily need to be provided.

Next, the synthetic resin sheet 10 is sent to a forming device 50, where it is continuously bent and shaped, for example, into the shape of an inverted U-shaped eaves gutter. The forming device 50 generally includes a forming roller and a forming convex die corresponding to the shape to be formed. Then, the synthetic resin sheet IO is transferred while being in contact with the forming roller of the forming device 50 or while sliding on the forming convex surface, thereby being continuously shaped.

In this case, both ends of the synthetic resin sheet 10 are held or held by clamps or end holders 60 in a shape corresponding to the shape of the end to be shaped.

A large number of clamps or end holders 60 are arranged at intervals so that the end shape of the sheet 10 is not distorted.

The shaped synthetic resin sheet 10 is sent to a coating device 70, where a photocurable unsaturated polyester resin liquid is applied to one or both sides of the shaped synthetic resin sheet 10. The coating device 70 has, for example, a resin liquid discharge slit having a shape corresponding to the shaped synthetic resin sheet 10, and the resin liquid discharged from the resin liquid discharge slit is applied to one side of the shaped synthetic resin sheet 10 ( (top surface).

When applying a resin liquid to both sides of the shaped synthetic resin sheet 10, the above-mentioned shaped sheet coated on one side is reversed, and another coating device having a resin liquid discharge slit of a shape corresponding to the shape is used. It can be carried out. Further, by using a coating device having a crosshead type coating mold, it is possible to simultaneously coat both surfaces.

The photocurable unsaturated polyester resin liquid is made by blending a commonly used liquid unsaturated polyester resin with a crosslinking monomer such as styrene and a photocuring agent such as 2,2-dimethoxy-2-phenylacetophenone. It is in liquid form. The cured product of such a photocurable unsaturated polyester resin liquid adheres well to the synthetic resin sheet 10 described above.

In addition, in the photocurable unsaturated polyester resin liquid, a thermosetting agent that can be cured by heating at a relatively low temperature may be used in combination with the above-mentioned photocuring agent. Furthermore, reinforcing fibers such as glass fibers that do not inhibit the transmission of light may be mixed and dispersed.

Thereafter, the shaped sheet coated with the resin liquid is sent to a light irradiation device 80, where it is irradiated with light. The light to be irradiated is active rays such as ultraviolet rays and visible rays, especially 3
An ultraviolet lamp with a wavelength of 00 to 400 nta is used, and an irradiation time of several minutes is sufficient. The photocurable unsaturated polyester resin liquid is cured by irradiation with light, and then pulled off by a tensioning device (not shown), for example, as shown in FIG.
A) A long composite molded body 90 such as an inverted U-shaped eaves gutter as shown in (B) is manufactured.

(Function) In the present invention, since a synthetic resin sheet having a thickness of 100 μm or more and a tensile modulus of 2×1O' kg/c4 or more is used, the sheet has high rigidity. Therefore, this synthetic resin sheet can be easily gripped or held with a clamp or an end holder, and smoothly supplied to a molding device such as a shaping mold or a curing zone. In addition, since it has high rigidity and is not soft or weak, it is easy to handle and has low contact sliding resistance with a shaping mold.

(Example) Examples of the present invention will be shown below.

1 star 1 unit By the method shown in Figure 1, the thickness is 120μ and the width is approximately 3QQ.
After passing a transparent saturated polyester sheet (sheet molded from PET G-6763 resin) 10 with a tensile modulus of elasticity of 2.8 x 104 kg/ai through the feed roll 30,
It was sent to a preheating device 30 where it was preheated to about 70° C., and then sent to a forming device 50 consisting of a forming convex type, where it was formed into the shape of an inverted U-shaped eaves gutter. During this shaping, both ends of the sheet 10 were held through a number of end holders 60 made of guide plates formed in the shape of ears of an eave gutter.

Subsequently, the sheet was sent to a coating device 70 having a resin liquid discharge slit having a shape corresponding to the shaped sheet IO, and a photocurable unsaturated polyester resin liquid was applied there to one side (upper surface) of the shaped sheet.

The above photocurable unsaturated polyester resin liquid is an unsaturated polyester resin liquid ($2064: manufactured by Showa Kobunshi Co., Ltd.) 100
It was prepared by mixing 0.5 parts by weight of a photocuring agent (Irgacure #651, manufactured by Nippon Ciba Geigy) and 1.5 parts by weight of a thickener (magnesium oxide).

Thereafter, the shaped sheet 10 coated with the above resin liquid is sent to the light irradiation device 80, where it is
The resin was cured by irradiating it with a UV lamp of H for about 2 minutes. Thus, as shown in Figure 2 (a), the imprinting sheet 1-
A long rain gutter composite molded body 90 having a total thickness of about 1.5 mm was manufactured by firmly adhering the cured resin 20 of the resin liquid to one side of the rain gutter 10.

In the manufacturing process of this long rain gutter composite molded body, sheet 1
0, both ends of the sheet 10 were held through a number of end holders 60 in the shape of ears of an eave gutter, but the operation could be performed smoothly and no side slipping would occur. It was well maintained and shaped into the shape of the eaves gutter. Further, the contact sliding resistance between the sheet 10 and the convex shape of the forming device 50 was small (the sheet 10 was smoothly transferred).

11■l In Example 1, the saturated polyester sheet 10 was not preheated at all, and the photocurable unsaturated polyester resin liquid was applied to both sides of the sheet 10 using a coating device having a crosshead type coating mold. A long rain gutter composite molded body 90 as shown in FIG. 2(b) was manufactured in the same manner as in Example 1 except that the shapes of the forming device 50 and the end holder 60 were changed. .

In this case as well, as in Example 1, both ends of the seam 10 were held through a number of end holders 60 in the shape of ears of an eave gutter. It was well maintained and shaped into the shape of the eaves gutter without causing any bending. Further, the contact sliding resistance between the sheet 10 and the forming device 50 was small (the sheet 10 was transferred smoothly).

(Effects of the Invention) As described above, the method for producing a long composite molded body of the present invention has a thickness of 100μ or more and a tensile modulus of 2xlO' kg.
Since a synthetic resin sheet with a diameter of /cd or more is used, it can be easily grasped or held with a clamp or an end holder, and smoothly supplied to a molding device such as a shaping mold or a curing zone.

Therefore, a long composite molded body of satisfactory quality without lateral deviation etc. can be obtained without adding a new end hardening process as in the conventional technique, and productivity is improved compared to the conventional technique.
It also has the advantage of lower equipment costs.

In addition, the above synthetic resin sheet is cheaper than the prepreg sheet used in the conventional technology, has good handling workability, and has low contact sliding resistance with a shaping mold, etc., so it can be shaped into at least one side. By applying a photocurable unsaturated polyester resin liquid and curing it by irradiating it with light, a long composite molded body of satisfactory quality can be easily and inexpensively produced.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an example of the method for producing a long composite molded body according to the present invention, and FIGS. 2 (a) and (b) show two examples of long composite molded bodies manufactured by the method according to the present invention. FIG. lO...Synthetic resin sheet, 20...Cured resin, 30
...Feed roll, 40...Preheating device, 50...Forming device, 60...Clamp or end holder, 70...Coating device, 80...Light irradiation device, 90...
...Long composite molded body.

Claims (1)

[Claims] 1. Thickness is 100 μ or more and tensile modulus is 2 x 10^
Continuously shape a synthetic resin sheet of 4 kg/cm^2 or more, apply a photocurable unsaturated polyester resin liquid that is adhesive to the sheet on at least one side, and cure it by irradiating it with light. A method for producing a long composite molded body, characterized by: