JPS62128751A - Composite cylinder material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Fields This invention is applicable to bobbins for winding filaments, threads, rovings, etc., winding cores for winding plastic films, metal foils, paper, etc., and bolts, nuts, nails, windings, etc. The present invention relates to composite cylindrical materials used for the bodies of containers containing recycled metal wires, etc.

Conventional technology and its problems Conventionally, bobbins, winding cores, and container bodies are made of paper tubes or fiber-reinforced plastics (hereinafter referred to as FRP)! 1l Wii
material was used. However, in the case of paper cylinder materials, strength, water resistance, moisture resistance, abrasion resistance, impact resistance, gas burr resistance, etc.
There was a problem that performance such as sex was not sufficient. Furthermore, when a paper tube material is used for a bobbin or a winding core, there is a problem in that it deforms when it is forcibly fitted onto a spindle. In addition, in the case of FRP tube material, the above-mentioned problems of paper tube material can be solved, but it is heavy, expensive, and produces high combustion power when burning waste, causing pollution. However, there were problems such as the tension unevenness and uneven expansion and contraction of the t&1i1t used as reinforcing materials, which caused changes over time such as twisting and distortion in the cylindrical material, the heat insulation property was not 1 minute, and the light shielding property was not sufficient. . In addition, if FRP tube material is used for the bobbin or winding core, it may be difficult to attach the cap, resonance may occur during rotation, and noise may be generated, and the spindle may become deformed due to aging or winding pressure. There have been problems in that it cannot be mounted on the spindle if there is a dimensional error in the tube material or the spindle. Generally speaking, when FRP tubing material is used for the body of a container containing things such as poles, nuts, nails, and wound metal wires, local contact pressure can cause bolts and other objects to sink into the inside of the body, causing cracks. There were problems such as the risk of cracking due to impact during transportation, damage to the contents, and insufficient insulation, which led to condensation on the inner surface and rust on bolts and the like.

An object of the present invention is to provide a composite tube material that solves the above problems.

Means for Solving the Problems The composite material according to the present invention comprises an inner layer made of paper and an outer layer made of fiber-reinforced plastic, and the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer are brought into close contact with each other.

In the above, the paper inner layer is formed, for example, by spirally winding a strip of paperboard, kraft paper, paper tube base paper, etc. around a mandrel. The thickness of the inner layer is determined as appropriate in consideration of the use of the composite tube material. The thickness of the inner layer can be changed by changing the thickness of paperboard, kraft paper, paper tube base paper, etc., or by changing the number of turns, that is, whether it is wound once or twice or more. When wrapping paper more than twice,
It is preferable to bond paper strips adjacent to each other in the inner and outer directions with adhesive. This adhesion can be achieved by applying a liquid adhesive to the paper before wrapping it around the mandrel, and by interposing a film adhesive between two or more paper strips or by applying a film adhesive to the surface of the paper strip. This is done by coating a strip of paper with a Hola 1 to Mel 1 type adhesive or laminating a film type adhesive on the surface of a strip of paper, and heating the same at the same time as the thermosetting resin forming the FRP layer. Water wet again,
In order to prevent the inner layer from changing over time due to humidity changes, temperature changes, etc., the inner peripheral surface of the inner layer may be covered with a synthetic resin coating layer. This resin coating layer is formed by placing a plastic film, laminated paper, resin-dipped paper, etc. on the inner peripheral surface of the inner layer. That is, before spirally winding the innermost paper in the inner layer, the above-mentioned plastic film or the like may be wound around a mandrel in advance.

As the fiber reinforcing material in the outer layer of FRP, polyester fibers, synthetic resin fibers such as Tetron VJ & Fiber, glass fibers, carbon fibers, boron fibers, cloths, rovings, mats, blinds, etc. are used. F.R.
The PtJ outer layer is formed using a thermosetting resin such as an unsaturated polyester resin, an epoxy resin, a vinyl ester resin, or a polyimide resin. The FRP outer layer is formed by spirally wrapping one or more strip-shaped fiber reinforcing materials impregnated with a thermosetting resin around a cylindrical paper inner layer, and then heating to harden the resin. Ru. In addition, if at least one fiber reinforcing material or the thermosetting resin impregnated with at least one reinforcing material is colored, the resulting colored pattern can be used for bobbins, winding cores, container bodies, etc. This makes it possible to identify them. The thickness of the outer layer is determined depending on the use of the cylindrical material, mainly considering strength.

In addition, the thermosetting resin is infiltrated into the outermost part of the inner layer, but the degree of penetration of the resin is slow, and there is paper that prevents the resin from reaching the inner paperboard etc. before the thermosetting resin hardens. It's good to keep it. Such papers include, for example, liner papers, laminates with a paper/film/paper structure,
Glassine paper, parchment paper, wrapping paper, etc. are used. Among the above papers, liner paper is preferably used with the surface layer facing outward.

If you insert paper like the one above on the outermost part of the inner layer,
This prevents the thermosetting resin impregnated into the fiber reinforcing material from penetrating into the paperboard or the like inside the fiber reinforcing material before it hardens. As a result, after the thermosetting resin is cured, voids are prevented from forming partially at the boundary between the inner and outer layers, and air bubbles are prevented from forming within the outer layer, and the strength of the outer layer is prevented from decreasing due to the presence of the voids and air bubbles. This prevents delamination between the inner layer and the outer layer. Furthermore, if the degree of penetration of the resin is severe, the thermosetting resin may reach the inner circumferential surface of the inner layer, causing the same problem as that of the FRP tube material.

Further, the above-mentioned paper located at the outermost periphery of the inner layer is brought into close contact with the outer layer by a thermosetting resin that has permeated the paper.

When the cylindrical material of the present invention is used for a bobbin, its inner diameter is usually about 10 to 155111 m. In this case, the thickness of the paper inner layer is preferably at least 2IIllIl. If this is done, the above-mentioned problems when using the FRP tube material for the bobbin will be solved. The thickness of the FRP outer layer at this time depends on the strength, weight, and overall wall thickness required for the bobbin, the type of thread wound around the bobbin, and the type and use of reinforcing material used for the outer layer of the tube material. It is determined by taking into account the type of thermosetting resin used.

Further, when the tube material of the present invention is used for the body of a container, its inner diameter is at most about 700 mm, but in this case, the thickness of the paper inner layer is preferably at least 3 mm. By doing so, the problems described above when using an FRP tube material for a container can be solved. The thickness of the FRP outer layer at this time depends on the strength and weight required for the bobbin, the type of reinforcing material used for the outer layer, the type of thermosetting resin used for the outer layer, and the material placed in the container. Determined by taking into consideration the type of Kasa.

Furthermore, the tubular material of the present invention is useful not only for bobbins, winding cores, and containers, but also for covering pipes such as steam piping that require insulation from the outside, protecting cables, sporting goods, reinforcing materials for packaging boxes, and packaging. It can also be used as a cushioning material.

Example 1 and 2 show a composite tube material according to the present invention.

The composite tube material (1) has an inner layer made of paper (2) and an outer layer made of FRP (
3), in which the outer circumferential surface of the inner layer (2) and the inner circumferential surface of the outer layer (3) are brought into close contact.

The inner layer (2) consists of four layers of paperboard (4) and a laminated paper (5) that is present around the outer periphery of the outermost paperboard (4). Adjacent paperboard (4) and paperboard (4)
and the laminated paper (5) are adhered to each other with an adhesive. The outer layer (3) consists of a plastic layer (6) made of unsaturated polyester resin and a reinforcement (7) consisting of a glass fiber roving embedded within the plastic layer (6).

The outer layer (3) and the laminated paper (5) are held in close contact by the unsaturated polyester resin slightly permeating the laminated paper (5) and being cured.

Furthermore, the laminates 1 to 5 prevent the unsaturated polyester resin from permeating into the paperboard (4).

Such a composite cylindrical material (1) is manufactured as shown in FIG.

First, apply adhesive coating tank (10) to four strips of paperboard (4).
After applying the adhesive to the side that will become the outer surface when wrapped around the outer peripheral surface of the mandrel (4), the four strips of paperboard (4) in the adhesive application tank are sequentially Wrap each layer of paperboard (4 layers) around the mandrel (H) in a spiral shape.
), the inner layer (2) is formed by winding the strip laminate 1 to paper (5) in a spiral manner. The inner layer (2) can be rotated and moved in the direction shown in FIG. 3 by a known bell 1 (not shown) or a driving device. Then, three strip-shaped reinforcements made of glass fiber roving (
7) is impregnated with an unsaturated resin in the unsaturated resin retainer 41 (11), and then the resin-impregnated reinforcing material (7) is wound spirally over the inner layer (2) one after another. Reinforcement material (7)
The amount of resin impregnated into the plastic layer (6) is set so that the reinforcing material (7) will not be exposed from the outer peripheral surface of the plastic layer (6) when the resin is cured in a subsequent step. Next, a release tape (12) made of paper, plastic film, or the like is spirally wrapped over the resin-impregnated reinforcing material (1) layer to prevent the resin from dripping. After winding the release tape (12), it is passed through a heating dryer (13) to harden the unsaturated polyester resin and form an outer layer (3). After that, cut into a predetermined length with a cutting device such as a cutter, and release tape (12
) is peeled off and then surface finished to produce a composite intermediate material (1).

In the above-mentioned manufacturing method, a reinforcing material made by flattening the roving into a band-like shape is used, but instead of this, a band-like collection of filaments drawn out from a large number of bobbins may be used.

In the above embodiment, the cross-sectional shape of the composite cylindrical material is circular, but the cross-sectional shape is not limited to this, and may be square, triangular, oval, or the like.

Effects of the Invention The composite cylindrical material according to the present invention consists of an inner layer made of paper and an outer layer made of fiber-reinforced plastic. The outer layer has excellent properties such as water resistance, moisture resistance, Iγ wear resistance, impact resistance, overall strength, and gas barrier resistance.In addition, the presence of the inner layer makes it possible to reduce weight, reduce cost, and reduce waste combustion. In addition, the inner layer can absorb changes over time such as twisting and distortion in the outer layer due to uneven tension and uneven expansion and contraction of GI used as a reinforcing material, which can be absorbed by the inner layer. It has the effects of sufficient strength and light shielding properties.Furthermore, the inner layer improves performance such as shock absorption, sound absorption, deformation absorption, etc.Therefore, the paper tube material mentioned above and F
The problems of RP cylinders can be solved all at once.

Furthermore, since the outer circumferential surface of the inner layer and the inner circumferential surface of the outer layer are in close contact with each other, there is no risk of slipping between the inner layer and the outer layer even when this cylindrical material is used for a bobbin, winding core, etc. and attached to a spindle. Furthermore, when used on the body of a container, the top cover, bottom cover, etc. can be easily and reliably attached.

If the inner layer and outer layer are not in tight contact with each other, it will be difficult to attach the top cover, bottom cover, etc.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a composite cylindrical material according to the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a diagram showing a method for manufacturing the composite cylindrical material. (1)... Composite tube material, (2)... Paper inner layer, (3)
...Fiber-reinforced plastic outer layer. Patent applicant Showa Products Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] Inner layer made of paper (2) and outer layer made of fiber reinforced plastic (3)
This is a composite cylindrical material in which the outer circumferential surface of the inner layer (2) and the inner circumferential surface of the outer layer (3) are brought into close contact.