JPS63165280A - Sheathing stabilizing method for filament bundle - Google Patents

Abstract

PURPOSE:To facilitate and complete execution of binding stabilization, by a method wherein, in sheathing for an electric wiring and the like, a bundle of a plurality of filaments is sheathed with a sheetform prepreg of fibre-reinforced plastic impregnated with photo curable resin, and is cured through irradiation with light. CONSTITUTION:Resin series, where a light initiator is mixed in one kind or a mixture of radial curable resin, e.g., unstaturated polyester resin, acryl resin, vinyl ester resin, is impregnated in a fibrous material, e.g., glass fiber, organic fibre to produce a sheetform material. Through regulation of viscosity, proper pliability and adhesion are provided, a sheetform or a tapeform prepreg, having a specified length, is manufactured. A tape of the prepreg is wound around a bundle of the filaments having a specified length or the bundle is wrapped with the tape, and after the sheathing is formed in a given shape, it is irradiated with natural light or artificial light to cure the prepreg. This method facilitates binding, reinforcing, protection, and stabilization of various pliable filament substance.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for bundling a plurality of linear bodies such as various electric wirings, communication wirings and cables thereof, or narrow-mouth fluid pipes, and coating/covering the outer surface. Regarding the method of protecting and fixing, in detail, a photocurable fiber-reinforced plastic sheet or tape-like Silipreg is pasted or wrapped around the outer surface of these linear bundles, and then natural or artificial light is irradiated. The present invention relates to a method for efficiently covering, protecting, and fixing the linear bundle by curing the prepreg. The method of the present invention is widely used in the fields of architecture, civil engineering, electric power, telegraph/telephone, vehicles, ships, aircraft, etc., as well as assembling electrical and electronic equipment, communication equipment, and control equipment for various machines. It covers all the work or process of covering and fixing the filament bundle.

[Conventional technology]

Conventionally, electrical wiring in various electrical/electronic equipment and communication equipment,
Communication wiring, electrical wiring between instruments in control devices of vehicles, ships, aircraft, grounds, various machines, etc., communication wiring and cables, or various types of pneumatic
c) Binding and fixing of flexible linear wiring (tubes) such as narrow-mouth plastic/rubber pipes for hydraulic lines, power lines inside buildings, outdoors, or underground, communication wiring, etc. The thread is mainly made by hand,
Bundle these linear bodies with string or tape, or cover the bundle by wrapping the entire surface of the wire, and then fix the bundle, which remains flexible, with a fastener such as a saddle, or simply tie it with string or adhesive tape. A common method is to stop it. However, with this method, the external protection and immobilization of the bundle is extremely incomplete. On the other hand, in order to completely reinforce and protect the exterior, it is necessary to cover and fix it with a hard and thick material, but it is not economical because molded materials must be prepared for a wide variety of types and shapes. It was a problem.

[Problem that the invention seeks to solve]

In view of the above-mentioned current situation, the present inventors first found that the method of binding and covering flexible linear bodies with adhesive tape is advantageous in terms of ease of construction, speed, and versatility; Since the covering layer remains flexible, it is incomplete in terms of reinforcement and earthquake resistance, so we searched for a suitable material. That is, prepreg (resin-impregnated fiber composite material), which is flexible during construction and then hardens and transforms through a chemical reaction when external energy is applied, is a promising material for this purpose. However, the curing reaction of existing glypregs such as epoxy resins and phenolic resins generally requires the addition of thermal energy, ie, heating to high temperatures, and several hours. For this reason, these existing Gripregs are unsuitable for applications that involve bundling linear bodies that have problems with heat resistance, such as vinyl-coated electric wires, optical communication lines, or plastic narrow-mouth tubes, and they also speed up the process. is disadvantageous, so it cannot be a material that achieves the object of the present invention.

The present invention eliminates properties that existing Gripregs do not have.

[Means for solving problems]

As described above, simple, rapid and general-purpose binding, covering and fixing of flexible linear bundles can be accomplished using a sheet-like or tape-like prepreg of fiber-reinforced plastic that cures quickly at low temperatures. Therefore, the main goal of the inventor's research was to discover a material that has the property of "low-temperature rapid curing" that is essential for this Gripreg. As a result of their search, they discovered a plastic silipreg that starts, grows, and hardens at room temperature using a light energy radical reaction mechanism. In other words, this prepreg is a resin system in which a photoinitiator is blended with one or a mixture of radically curable resins such as unsaturated polyester resins, acrylic resins, and vinyl ester resins, and is used for ordinary fiber-reinforced plastics such as glass fibers and organic fibers, and is impregnated with resin. It is made into a sheet by impregnating a fibrous base material used for cloth or resin-impregnated thread, and the viscosity is adjusted to give it appropriate flexibility and adhesiveness, and it can be used as a sheet or tape of an appropriate width. It is.

Wrap the above prepreg tape around a bundle of linear bodies of a certain length, or wrap the bundle so that the linear body and prepreg are in close contact with each other, and then bend it into a prescribed shape or change it to a prescribed cross-sectional shape. The coating is then exposed to natural or artificial light to cure the Silipreg. The resulting coating is a layered material with high strength, high rigidity, high hardness, and insulation, which is exactly the same as that of ordinary fiber-reinforced plastic moldings, and provides a satisfactory coating and protective layer.

[Effect]

According to the present invention, a linear bundle of arbitrary length, shape, or thickness can be coated with a sheet-like prepreg of photocurable fiber-reinforced plastic and irradiated with light. Since a reinforcing protective layer can be easily formed and a bundle of linear bodies can be fixed, it greatly contributes to the assembly process of various precision instruments and machines, as well as various types of outdoor wiring work. For example, in the indoor assembly process, prepreg tape is coated in the same way as conventional adhesive tape, and in some cases it is bent into a predetermined shape and shaped, and then exposed to appropriate artificial light. This is efficiently carried out by irradiating light from an irradiation device. If the photocurability of the prepreg is improved, the curing time will be shortened and it will be more effective. Furthermore, if the wiring work is done outdoors in a place where sunlight can be obtained, the coating layer will harden without any operation required. If light is blocked, curing will not proceed, so there will be no problem with the coating work.

As mentioned above, the cured coating layer thus obtained is an excellent coating protective layer having mechanical and electrical properties equivalent to those of ordinary fiber-reinforced plastic molded products.

The present invention utilizes a sheet of light-curing fiber-reinforced plastic in the process of bundling, covering, protecting, and fixing finite-length flexible and low-elastic linear bundles including the various types of wiring and piping described above. It is characterized by using prepreg.

The present invention will be explained in detail below. The plastics that are the main components of the Silipreg of the present invention are unsaturated polyester resins,
One type selected from silanac, collectively 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. It is something. Photoinitiators are organic compounds classified as benzoin ether, acetophenone, benzophenone, thioxanthone, ketal, onium salt, etc. that are decomposed by light of a specific wavelength in the ultraviolet to visible range to generate radicals. One type or a mixture of these, and optionally a co-catalyst such as an amine, may be used. The curing speed of the prepreg can be adjusted as desired by changing the type and amount of these photoinitiators.

The fiber material, which is another component, is preferably a material in the form of mat, cloth, or flexible paper because of the ease of manufacturing sheet prepreg, but it is not limited to these materials. Further, as for the type of fibers, glass fibers and organic fibers are preferable in terms of filling and reinforcing properties, but the invention is not limited to these, and one or more of these types can be widely used at the same time.

Other viscosity modifiers, wetting agents, defoaming agents, etc. necessary for the production of Noripreg are also appropriately blended, but none of them are specified.

Prepreg sheets can be easily produced by hand-laying, but they are generally produced by impregnating a fibrous material placed on a release sheet with a liquid composition of a photocurable resin, and then adjusting the viscosity. Furthermore, it can also be produced continuously using a suitable impregnation machine. The obtained sheet can also be slit to a predetermined width to form a tape, and then wound around a tube with the release paper facing outside. The thickness of the sheet is approximately 0.1 to 5 mm, preferably 0.2 to 2 mm, in consideration of the protective effect and convenience of handling, but is not limited to this range.

The above manufacturing method makes it possible to obtain a photocurable prepreg sheet suitable for the present invention.

The light that can be used in the present invention is divided into natural light and artificial light. Natural light is generally sunlight, and the place where this is used is, in principle, an outdoor sunny place9. In addition, artificial light is particularly light with a characteristic wavelength at which the photocurable plastic of the present invention undergoes a curing reaction, that is, light from the ultraviolet region to the visible region.There are various devices for generating this light, but the most effective one is This is called a high-pressure mercury lamp for photochemistry. Although any ultraviolet light generating device can be used in the present invention, from the viewpoint of safety, the "healthy lamp" (sunlan lamp) that has been on the market in recent years is also effective.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples.
This specification specifies the use of Zoreg, and is not limited to the prepreg manufacturing method described as a specific example, and the coating method and curing method for its use.

Production example 1 Vinyl ester resin (Epivis type epoxy acrylate resin: Lipoky-7@R802, manufactured by Showa Kobunshi Co., Ltd.) 1
Mix 7.2 parts of 7-talic anhydride to 0.00 parts and make 100 parts.
The reaction was carried out at -110°C for 90 minutes.

2-Hydroxy-2-methyl-1-phenylgropanone (Daroki, 7.5%) was added as a photoinitiator to 100 parts of this modified vinyl ester resin (a liquid mixture of about 45% styrene).
@ 1173, manufactured by Merck & Co., Ltd.) and 1 part of magnesium oxide (Magmic @, manufactured by Kyowa Chemical Industry Co., Ltd.) as a thickener.
This mixture was stirred and mixed under reduced pressure using an intensive mixer to obtain a liquid resin mixture having a viscosity (B-type viscometer) of 15 poise.

A release sheet with a width of 500 mm is moved on a small impregnation machine (
Apply the above liquid resin mixture to a uniform thickness over a width of 450 cm using a knife coater on Hyna Sheet ■80XT (manufactured by Fujimori Industries), and place a glass chopped strand mat (Asahi Fiberglass 0M305) on top of this layer. Impregnation is carried out using an impregnating roll, and the winding machine at the end of the impregnating machine is used to
It was wound up into a paper tube with the release sheet facing outside. A sheet of approximately 10 m each was wound around a paper tube, sealed and packaged with aluminum laminated kraft paper, and then placed in an air tank maintained at 40° C. for 2 days to age and thicken. After being taken out and cooled to room temperature, the tapes were slit into 5 tM widths using a commercially available slitter, and each tape was placed in a cylindrical tin can and sealed. This tape had a thickness of about 0.7 m, flexibility, and moderate adhesiveness. (hereinafter referred to as Qi f1).

Production Example 2 A photoinitiator, 2-hydroxy-
2-Methyl-1-7enylzolopanone (Daroquia ■1
173, Merck ring) and 0.5 part of a thickener, magnesium oxide (Magmic ■, manufactured by Kyowa Chemical Industry), were added, and the mixture was stirred and mixed under reduced pressure with an intensive mixer to form a liquid resin with a viscosity of 20 poise. A mixture was obtained.

An unsaturated polyester resin grippreg was prepared in the same manner as in Production Example 1 except that the glass chopped strand mat in Production Example 1 was replaced with a saturated polyester resin fiber nonwoven fabric (Sontara ■8000, manufactured by DuPont). The thickness of this material was approximately 0.4 m. (hereinafter referred to as tape 2).

Example 1 Eight vinyl-covered ground wires cut into approximately 30cm lengths were prepared.
Tapes 1 and 2 of Production Examples 1 and 2 were placed at about 15 m in the center.
was wrapped with an overlap width of about 1a. This product was exposed to direct sunlight outdoors (mid-September, 2:00 p.m., Gunma Prefecture).

Both tapes 1 and 2 cured in about 8 minutes.

Example 2 A high-pressure mercury lamp (manufactured by I-Graphics, UE-011-203, 100V,
1 kW) at a distance of 30 crn below. Both cured in about 1 minute.

Example 3 Two three-core vinyl-coated electric wire cables each having a diameter of 10 mm were lined up flat and wrapped in a tape 1 cut to a length of 10 m in the length direction. This item was placed between two sun lamps facing each other with an interval of about 20 cm (stan v - to qi n, 5
SL-25OA, 100V% 250W) was held at the center. Both cured in about 8 minutes.

Example 4 Compressed air line tube with a diameter of 6 m (made of nylon 11 resin)
Three of them were coated with Qi f1 to a width of 5 cm, and a hand-held high-pressure mercury lamp (manufactured by Sen Tokushu Light Source Co., Ltd., Cure Love Mini HLR-
100M, 100V, 100W) from a distance of about 10 crn. It hardened in about 5 minutes.

〔Effect of the invention〕

Sheet form of photocurable fiber reinforced plastic! Repreg can be used to bind, reinforce, protect, and
Immobilization can be carried out much easier and more completely. The present invention can be applied regardless of the type of linear body and its location, so it is of great benefit to a wide range of industries.

Claims (1)

[Claims] A bundle of multiple linear bodies is covered with a sheet-like or tape-like prepreg of fiber-reinforced plastic produced by impregnating a fibrous base material with a photocurable resin, and the coating layer is cured by irradiation with light. A method for covering and fixing a linear body bundle, characterized by: