JPH0753555B2 - Method for immobilizing coating of linear bundle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to various electric wirings, communication wirings and cables thereof, or a plurality of linear bodies such as narrow-mouth fluid pipes, which are bound together to cover the outer surface. For details on the method of protecting and fixing, a sheet-shaped or tape-shaped prepreg of photocurable fiber reinforced plastic is attached or wound around the outer surface of these linear body bundles, and then the prepreg is irradiated with natural light or artificial light. The present invention relates to a method for efficiently covering / protecting and fixing the bundle of linear bodies by curing the resin. The method of the present invention includes, in addition to assembling electric / electronic devices, communication devices, and control devices for various machines, construction, civil engineering,
It covers all the work or process of covering and fixing the bundle of linear bodies that is widely performed in the fields of electric power, telegraph / telephone, vehicle, ship, aircraft and the like.

[Conventional technology]

Conventionally, various electrical and electronic equipment, electrical wiring in communication equipment,
Communication wiring and electrical wiring between instruments in control devices such as vehicles, ships, aircraft, plants, and various machines, communication wiring and cables, or plastic for various pneumatic and hydraulic lines. Rubber narrow-mouthed pipes, or bundles of flexible linear wires (pipes) such as power lines, communication wires, etc. inside buildings, outdoors or in the ground,
Immobilization is mainly done by manually bundling these linear bodies with threads, strings, or tape, or by covering the entire surface with a tape, and then fixing the bundle that remains flexible with a stopper such as a saddle. , It is common to use a string or adhesive tape to easily stop. However, with this method, the external protection and immobilization of the bundles is very imperfect. On the other hand, in order to complete external reinforcement protection, it is necessary to cover and fix it with a hard and thick member, but it is economically problematic because it is necessary to prepare molded members corresponding to different types and shapes. Met.

[Problems to be solved by the invention]

In view of the current situation described above, the present inventors first of all, the method of binding and covering the flexible linear body with an adhesive tape is advantageous in that it is simple, quick and versatile in terms of construction, Since the coating layer remains flexible, we searched for a suitable material from the perspective of incomplete reinforcement and earthquake resistance. That is, a prepreg (resin-impregnated fiber composite material), which is flexible at the time of construction and then undergoes a chemical reaction by externally applying energy to cause hardening transformation, is a promising material for this purpose. However, the curing reaction of existing prepregs such as epoxy resins and phenol resins generally requires application of heat energy, that is, heating to a high temperature, and requires several hours. For this reason, these existing prepregs are unsuitable for use in the binding of linear bodies whose heat resistance is a problem, such as vinyl-coated electric wires, optical communication lines, or plastic narrow-mouth tubes, and further speed up the process. However, it cannot be a material for achieving the object of the present invention.

The present invention has been achieved by the discovery of a new prepreg which has characteristics that existing prepregs do not have, that is, room temperature curing and rapid curing.

[Means for solving problems]

As described above, simple, quick, and general-purpose binding of the flexible linear body bundle, coating, and immobilization can be performed using the sheet-shaped or tape-shaped prepreg of the low-temperature fast-curing fiber-reinforced plastic. Therefore, the main goal of the study by the present inventors was to find a material having the property of "low temperature fast curing" which is essential for this prepreg. As a result of the search, we found a plastic prepreg that starts and grows and cures by a radical reaction mechanism by light energy at room temperature. That is, this prepreg is a resin system in which a photoinitiator is mixed with one or a mixture of radical curable resins such as unsaturated polyester resin, acrylic resin and vinyl ester resin, for glass fiber, organic fiber, etc. Sheet or tape which is used as a sheet or tape with an appropriate width by impregnating a fibrous base material used for cloth or resin-impregnated yarn into a sheet shape or without adjusting the viscosity. Is.

Wrap the tape of the above prepreg around a bundle of linear objects of a certain length, or wrap the bundle and make the linear object and the prepreg adhere well, and then bend it into a predetermined shape or change it to a predetermined cross-sectional shape. Then, thereafter, the coating is irradiated with natural light or artificial light to cure the prepreg. The obtained coating product is a layered product having high strength, high rigidity, high hardness and insulating property which is completely the same as that of a usual fiber reinforced plastic molded product, and is a satisfactory coating protective layer.

[Action]

According to the present invention, a linear bundle of arbitrary length, shape or thickness is coated with a sheet-like prepreg of a photo-curable fiber reinforced plastic and is irradiated with light by a simple operation. Since the protective layer having a reinforcing property can be easily formed and the bundle of linear bodies can be fixed, it greatly contributes to the assembly process of various precision instruments and machines or various wiring works outdoors. For example, in the indoor assembly process, after covering with prepreg tape in the same way as the conventional adhesive tape covering, and in some cases bending it into a predetermined shape to shape it, and then irradiating it with appropriate artificial light. It is performed efficiently by irradiating light from the device. If the photo-curing property of the prepreg is improved, the curing time is shortened and it becomes more effective. Also, if it is a place where sunlight can be obtained by outdoor wiring work, the coating layer will be cured without any operation. If the light is shut off, the curing will not proceed and the coating operation will not be hindered.

The cured coating layer thus obtained is, as described above, an excellent coating protective layer having mechanical and electrical properties equivalent to those of ordinary fiber-reinforced plastic moldings.

The present invention, in the process of binding, covering, protecting and fixing a flexible and low-elasticity linear body bundle of finite length including the above-mentioned various wirings and pipes, a sheet shape of photocurable fiber reinforced plastic It is characterized by using a prepreg.

Hereinafter, the present invention will be described in detail. The plastic which is the main component of the prepreg of the present invention is an unsaturated polyester resin,
One or a mixture of plastics generically called acrylic resin and vinyl ester resin, or a mixture thereof, which has the ability to initiate and grow a radical crosslinking reaction by incorporating a photoinitiator. Is. Here, the photoinitiator is an organic compound classified into benzoin ether, acetophenone, benzophenone, thioxanthone, ketal, onium salt, etc., which decomposes to generate a radical from light of a specific wavelength in the visible region from ultraviolet. One kind or a mixture, and optionally a mixture of these with a promoter such as amine is used. The curing speed of the prepreg can be arbitrarily adjusted by changing the kind and amount of these photoinitiators.

As the fibrous material which is another component, a mat-shaped, cloth-shaped or flexible paper-shaped material is preferable because of the ease of manufacturing a sheet-shaped prepreg, but the present invention is not limited to this. In addition, glass fibers and organic fibers are preferable as the type of fiber in terms of softening property and reinforcing property, but are not limited thereto, and one kind or a plurality of kinds thereof are widely used at the same time.

In addition, a viscosity adjusting agent, a wetting agent, a defoaming agent and the like required for preparing the prepreg are appropriately mixed, but none of them is specified.

Although a prepreg sheet can be easily produced by a manual loading method, it is generally produced by impregnating a fibrous material placed on a release sheet with a liquid compound of a photocurable resin and then adjusting the viscosity. Further, it can be continuously produced by using an appropriate impregnation machine. The obtained sheet may be slit into a predetermined width to form a tape, and the release paper may be placed outside and wound on a tubular article. The thickness of the sheet is about 0.1 to 5 mm, preferably about 0.2 to 2 mm in consideration of the protection effect and the convenience of handling, but is not limited to this range.

The photo-curable prepreg sheet suitable for the present invention can be obtained by the following production method.

The light usable in the present invention is classified into natural light and artificial light. Natural light is generally sunlight, and the place where it is used is basically an outdoor sunshine place. Further, artificial light is light of a characteristic wavelength at which the photocurable plastic of the present invention proceeds a curing reaction, that is, light from the ultraviolet region to the visible region, and there are various devices for generating this, but the most effective is It is called a high pressure mercury lamp for photochemistry. Although any of the ultraviolet ray generators can be used in the present invention, a “health lamp” (sun run lamp) which has been put on the market in recent years from the viewpoint of safety is also effective.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention specifies the use of a sheet-like prepreg of a photocurable fiber-reinforced plastic, and in the production method of the prepreg described as a specific example and its use. The coating method and the curing method are not limited to the individual methods.

Production Example 1 Vinyl ester resin (epibis-type epoxy acrylate
Resin: Lipoxy R802, Showa High Polymer Co., Ltd. 100 parts
Phthalic anhydride (7.2 parts) is mixed for 90 minutes at 100-110 ℃.
It was made to react. This modified vinyl ester resin (with about 45%
Liquid mixture with styrene) 100 parts of 2-H2 as a photoinitiator
Droxy-2-methyl-1-phenylpropanone (Daro
Cure 1173, manufactured by Merck & Co., Inc., oxidized as a thickener
Magnesium (magmic , Kyowa Chemical Industry Co., Ltd.)
Add 1 part and reduce the formulation with an intensive mixer.
Viscosity (B-type viscometer) 15 poise liquid by mixing under pressure
A resin mixture was obtained.

A release sheet (width: 500 mm) that moves on a small impregnator.
Nasheet 80XT, made by Fujimori Kogyo) and width with a knife coater
Apply the above liquid resin mixture to 450 mm to a uniform thickness,
Glass chopped strand mat (Asahi Fine
Place the CM305 made by Bargrass and impregnate with the impregnating roll.
Remove the release sheet by the winder at the end of the impregnation machine.
It was turned to the side and rolled up on a paper tube. About 10m per sheet of paper
Roll it up and close it with aluminum laminated kraft paper.
After sealing and packing, put this in an air tank kept at 40 ℃ for 2 days.
It was aged and thickened. After taking out and cooling to room temperature, it is marketed
Slit with a slitter of 5 cm width and
The container was sealed in a tin can. This tape is
It has a thickness of about 0.7 mm and is flexible and has a suitable adhesiveness.
It was. (Hereinafter referred to as Tape 1).

Production Example 2 Unsaturated polyester resin (Rigolac M411, Showa Takamin
100 parts, photoinitiator, 2-hydroxy-2-methyl
Le-1-phenylpropanone (Darocur 1173, Mel
1 part), thickener, magnesium oxide (magmium)
Ku , Manufactured by Kyowa Chemical Industry Co., Ltd.)
Stir under reduced pressure with an intensive mixer to obtain a viscosity of 20 poise.
A liquid resin mixture of

The glass chopped strand mat of Production Example 1 was saturated with
Reester resin fiber non-woven fabric (Sontara 8000, DuPont
The same method as in Production Example 1 except that the
A prepreg of Japanese polyester resin was prepared. This one
Had a thickness of about 0.4 mm. (Hereinafter referred to as tape 2).

Example 1 Eight pieces of vinyl-coated ground wire cut to about 30 cm were aligned, and about 1 cm of the tapes 1 and 2 of Production Examples 1 and 2 were placed at a central part of about 15 cm.
Wrapped with an overlapping width of m. This item was exposed to direct sunlight outside (mid September, 2:00 pm, place Gunma prefecture). Both Tapes 1 and 2 cured in about 8 minutes.

Example 2 Similar to Example 1, the bundles respectively coated with the tapes 1 and 2 were gently rotated while being placed under the high-pressure mercury lamp (UE-011-203, 100V, 1kW, manufactured by Eye Graphics Co., Ltd.) 3
It was irradiated with light at a distance of 0 cm. Both cured in about 1 minute.

Example 3 A tape 1 in which two 3-core vinyl-coated electric wires and cables having a diameter of 10 mm are flatly arranged and cut to a length of 10 cm in the longitudinal direction 1
I wrapped it in. Two sun lamps (Stanley Electric, SSL-250A, 1
00V, 250W) held in the center. Both cured in about 8 minutes.

Example 4 Pneumatic line tube with a diameter of 6 mm (made of nylon 11 resin) 3
The tape is covered with tape 1 to a width of 5 cm, and a handheld high-pressure mercury lamp (made by Sen Special Light Source Co., Ltd., Cure Love Mini HLR-100M, 1
Irradiation was performed from a distance of about 10 cm with 00V, 100W). Hardened in approximately 5 minutes.

〔The invention's effect〕

Using sheet-like prepreg made of photo-curable fiber reinforced plastic, binding, reinforcement, protection, and protection of various flexible linear objects
Immobilization can be done very easily and more completely. INDUSTRIAL APPLICABILITY Since the present invention can be applied regardless of the type and location of the linear body, it greatly benefits the industrial world.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-72932 (JP, A) Actually opened 59-166317 (JP, U) Actually opened 61-13919 (JP, U)

Claims (1)

[Claims] 1. A sheet-shaped or tape-shaped prepreg made of fiber-reinforced plastic produced by impregnating a fibrous base material with a photocurable resin, and a bundle of a plurality of linear bodies is irradiated with light to form a bundle. A method for coating and fixing a bundle of linear bodies, which comprises curing the coating layer.