JPH0289630A - Structure for honeycomb and manufacture thereof - Google Patents

Abstract

PURPOSE:To increase the strength of a vertical direction and the strength of a horizontal direction by sticking mold releasing sheet at a certain distance on both sides or one side of a non-cured fibre reinforced thermosetting resin composite sheet having double-sided viscosity, and rolling it up, and thus adhering the exposed parts of the fibre reinforced thermosetting resin composite sheet. CONSTITUTION:A mold releasing sheet 4 is stuck at a certain distance on the both sides or one side of a fibre reinforced thermosetting resin composite sheet 3, however, a sheet made by mold releasing treatment, for example, silicon treatment on both sides or one side of a synthetic film or paper or the like is given as a mold releasing sheet. And, the distance for adhering the mold releasing sheet is made preferably to be 3 to 1 - 5 to 1 in a mold releasing sheet width and the fiber reinforced thermosetting resin composite sheet width. And, the exposed parts of the fibre reinforced thermosetting resin composite sheet are adhered to one another while winding the sheet 1 obtained round a drum 6. In consequence, the exposed parts of the sheet may adhere to the upper and lower sheets through the pressure exerting on the peripheral surface thereof as the sheet is wound round the drum.

Description

DETAILED DESCRIPTION OF THE INVENTION (&> Industrial Application Field The present invention relates to a honeycomb structure and a method for manufacturing the same.

(b) The surface of laminating materials consisting of conventional I-type aluminum foil, metal foil such as iron M, paperboard, Iff-impregnated paper, synthetic paper, etc., and plastic sheets such as polyethylene and polypropylene is applied to the surface of the laminating material. Apply adhesive at intervals to make a product of 1 m L, 1 m L.
A method is known in which a honeycomb core is formed by expanding the r1 layer body in the opposite direction to J7.

(c) Problems to be Solved by the Invention As is well known, the honeycomb structure obtained by this method has the following characteristics:
It has great strength against vertical forces, but is extremely weak against horizontal forces as it can cause peeling.

Further, this honeycomb structure is used on a flat surface, and it is very difficult to use it on a curved surface.

Also, the conventional manufacturing method is as above! I! This is a so-called batch method, in which a pattern of adhesive is coated on the surface of the material for layering, a predetermined length of the adhesive is laminated, and the adhesive is cured before spreading, which poses problems such as poor productivity. Ta.

In view of these circumstances, the present invention provides a VT structure for honeycomb that increases not only the vertical strength but also the horizontal strength of the honeycomb cell portion, and that can be manufactured continuously rather than in a patch manner, and its manufacture. The purpose is to provide a method.

(d) To achieve the above object, the honeycomb structure of the present invention is made of an uncured fiber-reinforced thermosetting resin composition sheet having double-sided adhesive properties or An S-shaped sheet is pasted on one side at predetermined intervals, and this is wound to form the fiber-reinforced thermosetting film (
It is made by gluing the exposed parts of a fat-filled parabolic sheet.

This honeycomb structure is suitably manufactured by the method of the present invention described below.

That is, the method for manufacturing a honeycomb structure of the present invention involves pasting release sheets at predetermined intervals on both sides or one side of an uncured fiber-reinforced thermosetting resin m parabolic sheet having double-sided adhesiveness, and This method is characterized in that the fiber-reinforced thermosetting resin composition sheet is adhered while being wound around a cylindrical drum.

In the present invention, uncured fiber a-reinforced thermosetting flf II! having double-sided adhesiveness is used. A step (A) of attaching release sheets at predetermined intervals to both sides or one side of the composition sheet is carried out.

Examples of thermosetting resins having double-sided adhesive properties in the present invention include epoxy resins, unsaturated polyester IA resins, vinyl ester resins, etc. Among these, from the viewpoint of handling properties, it is preferable to use thermosetting resins that are liquid at room temperature. Epoxy resin is good, and depending on the case, epoxy resin that is solid at room temperature may be added to it, or 717 resin may be dissolved therein.

A curing agent and a curing accelerator may be added to the above-mentioned thermosetting material, if desired. The curing agent or curing accelerator may be any conventional curing agent that exhibits curing action when heated, and generally it is sufficient if it is active in the temperature range of 80 to 200°C.

Specifically, as a curing agent for epoxy resin, for example,
imigsol derivatives such as nocinanoamide, 4,4°-diami/nophenyl sulfone, 2-n-heptadecyl imiguzole, isophthalic acid nohydranide, N-N-noalkylurea derivatives, N-N-noalkylthiourea derivatives, Tetrahydroheptalic anhydride, hexahydrophthalic anhydride, methylnanotsuccinic acid, ■-7enylennoamine, methylenenoaniline, noethylamine/propylamine 1,
Examples include boron trisulfide monoethylamine adduct, dicyanamide, polyamide, noethylenetriamine, triethylenetetramine, ami/ethylbevilanone, and the like. In addition, for unsaturated polyester resins, examples of curing agents include methyl ethyl ketone peroxide, cumene hydroperoxide, cyclohexanone veroquinide, and L-butylberoxyotatoate, and curing accelerators include cobalt curing accelerators and manganese curing accelerators. Examples include yarn hardening accelerated cutting. Furthermore, as a hardening agent for vinyl ester resin, methyl ethyl ketone peroxide-cobalt soap,
Methyl ethyl ketone peroxydocobal) 7F sapon-
Examples include methylaniline and the like.

The amount of this curing agent and curing accelerator used is 10 parts of the thermosetting resin.
A ratio of 1 to 30 heavy mounds per 0 weight mound is sufficient.

Various additives may be added to the thermosetting resin composition consisting of a hardening agent, a hardening agent, and a hardening accelerator, depending on the preference.

For example, for the purpose of improving sheet forming ability, an amount of epoxy Thermoplastic resins such as butanoene-acrylonitrile copolymers or derivatives thereof can be blended.The amount used is 5 to 100 parts by weight per 100 parts by weight of the thermosetting resin. It is better.

In addition, (■ Calcium carbonate,
Fillers such as talc, asbestos, clay, silica, carbon black, and colloidal silica are used.

The L-top thermosetting resin composition is applied to a reinforcing fiber base material to form a fiber-reinforced thermosetting resin composition sheet,
The reinforcing fiber base material may include lath fibers, carbon fibers, and other materials. There are 8 quality fibers, synthetic fibers, and ponds! Those made of quality fibers can be used, and these can also be used in combination.

Preferred reinforcing fiber substrates are substrates made of glass fibers, carbon fibers, and synthetic fibers.

The form of reinforcement a#t is not particularly limited either, for example,
In the case of a#u, there are rovings, roving crosses, chopped strands, chopped strand cloaks, continuous strand mats, sir7 acing cloaks, crosses, other forms, and combinations thereof. .

In this step (A), release sheets are pasted at predetermined intervals on both sides or one side of this aM1-reinforced thermosetting layered parabolic sheet. Mold release treatment on both sides or one side of paper etc.
For example, those treated with silicone can be mentioned.

Also, the interval at which the release sheet is pasted is such that the width of the release sheet and the width of the fiber-reinforced thermosetting resin composition sheet are 3:1 to 5.
It is preferable to set it to 1. If the width of the fiber-reinforced thermosetting 1134 resin composition sheet is too narrow, peeling will occur when it is expanded to obtain a honeycomb structure, whereas if it is too wide, a good honeycomb structure cannot be obtained, which is not preferable.

In the present invention, next, the step (B) of bonding the exposed portion of the fiber-reinforced thermosetting resin composition sheet is performed while winding the sheet obtained in the step (A) around a drum.

In this step (A), when the sheet obtained in step (A) is wound around a drum, the exposed portion of the sheet adheres to the upper and lower sheets due to the pressure applied to the circumferential surface of the drum.

The above drum is made by continuously winding and gluing.
Although it is intended for making a honeycomb structure, there are no particular limitations on its structure, but the diameter may be as large as possible (as long as it is large).

The sheet wound up in this way has a spiral shape with an open center, and the above-mentioned release sheet is interposed in a staggered manner, and the areas where the release sheet is not interposed are uncured fiber-reinforced thermosetting sheets. The plastic composition sheets are integrated with each other due to their surface adhesion.

This is cut into a predetermined length in the thickness direction, and the cut pieces are expanded and expanded in opposite directions to obtain a honeycomb structure. In this case, since this honeycomb structure is uncured, it can be attached to a required location, heated and cured to obtain a honeycomb structure. It is also possible to cure it in advance.

The honeycomb structure of the present invention can be obtained through these steps (A) and (B).

((,) Effect The honeycomb structure of the present invention is produced by pasting release sheets at predetermined intervals on both sides or one side of an uncured fiber-reinforced thermosetting resin composition sheet with adhesive properties on both sides. By winding the fiber-reinforced thermosetting resin (") and adhering the exposed part of the resin composite sheet, by configuring it in this way, the fiber-reinforced thermosetting resin 1. The exposed parts are glued together, heated and cured to form an integral bond.
It becomes extremely strong not only against the force in the stacking direction, but also against the force in the horizontal direction.

Also, this honeycomb N! The honeycomb structure is obtained by heating and curing, and this honeycomb structure has high strength and can be used not only on flat surfaces but also on curved surfaces.

Moreover, the honeycomb structure of the present invention! l! According to this method, excellent honeycomb structures can be manufactured continuously without requiring special techniques or mounting.

(f) Examples Hereinafter, the present invention will be explained in detail based on Examples, but the present invention is not limited thereto.

In FIG. 1 of the six bright honeycombs, the honeycomb structure (5) of the present invention is
A predetermined interval "C" is formed on both sides or one side of the uncured kIL fiber-reinforced thermosetting resin composition sheet (3) having double-sided adhesiveness.
An AII type sheet (4) is pasted and wound around it to adhere the exposed portion (311) of the fiber reinforced thermosetting IF resin composition sheet (3).

Example 1 Ebiko) #828 (manufactured by Yuka Shell Co., Ltd., screw 7/-le A type liquid epoxy (14 fat) 50 parts, Evomic R-1
51 (flexible eboxime manufactured by Mitsui Petrochemical Epoxy Co., Ltd.)
10 parts of Byron $500 (polyester fff resin manufactured by Toyobo Co., Ltd.), 3 parts of non-annoamide (epoxy latent curing agent manufactured by Nippon Carbide Co., Ltd.), Curesol C, Z-CN (manufactured by Shikoku Kasei Co., Ltd.) An epoxy resin composition consisting of 1 part of epoxy resin latent curing agent), 50 parts of talc, and 4 parts of asbestos powder is kneaded using a normal mixing roll, and the resulting resin mass is coated with a roll coater to a thickness of 0. I created two volumes of sheets based on 3j theory, and also this! The J resin receipts 1) and (1) are pasted on both sides of the reinforcing fiber base material (2), which is Lacrosse (WE-22D104 manufactured by Nittobo Co., Ltd.) (2), thereby creating an uncured fiber-reinforced thermosetting material. A resin composition sheet (3) was obtained.

On one side of the obtained fiber-reinforced thermosetting resin composition sheet (3), as shown in Fig. 2, a release sheet (paper) (vA3 c+a) (4) with both sides treated with silicone was pasted in a pattern at 10 m intervals. As shown in Figure 3, this is wound 20 times around a cylindrical drum (6) with a diameter of 5 m, and the exposed part (3a) of this sheet (3) is wrapped around the upper and lower sheets (3).
), thereby obtaining the VT body (5) for honeycomb of the present invention.

As shown in Fig. 4, this was cut in the thickness direction to the outermost circumference length of 30 cm, expanded outward to obtain a honeycomb structure, and then left at a temperature of 150°C for 30 minutes. By curing in a dryer, a honeycomb structure (10) shown in FIG. 1 was obtained. This honeycomb structure (10) was found to be strong not only in the vertical direction but also in the horizontal direction.

Example 2 Next, Nipico) $871 (Guimer acid modified epoxy resin manufactured by Yuka Shell Co., Ltd.) 80 parts, Ebitsu) #1002 (
5 parts of Epicoat #828 (mentioned above) and 10 parts of Hiker CTBN 1300x8 (BF1 Gundrich nitrile rubber) were melt-mixed in a mixing pot,
1 part of Curesol C, Z (mentioned above), 5 parts of non-annoamide (mentioned above), 50 parts of talc, and 2 parts of asbestos powder were mixed into 100 parts of the obtained composition and mixed with a normal mixing roll. Thereafter, a honeycomb structure (5) was obtained through the same steps as in Example 1.

This was carried out in the same manner as in Example 1 to obtain a honeycomb structure (10) shown in FIG. This no A nicum structure (10
) was found to be strong not only in the vertical direction but also in the horizontal direction.

As a honeycomb surface plate (top plate), the honeycomb structure (5) created in Example 1 was attached to both sides of the honeycomb cell, and heated and cured at a temperature of 15 Q'C for 30 minutes.
A honeycomb structure with strong compression force was obtained.

(g) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

In the honeycomb structure according to claim 1, the uncured fiber-reinforced thermosetting resin set 7A has double-sided adhesiveness! Release sheets are pasted at predetermined intervals on both sides or one side of the am-reinforced thermosetting resin composition sheet, and the exposed parts of the am-reinforced thermosetting resin composition sheet are adhered by winding the release sheets, so that the force in the vertical direction can be reduced. It has the effect of becoming extremely strong not only against horizontal forces, but also against horizontal forces. Further, this honeycomb structure is obtained by heating and curing, and since this honeycomb structure has high strength, it can be used not only on flat surfaces but also on curved surfaces.

In the method for manufacturing a honeycomb structure according to claim 2, a release sheet is pasted at a predetermined interval of 111I on one side of a double-sided parabolic sheet of an uncured fiber-reinforced thermosetting resin composition sheet having double-sided adhesiveness, While winding this around the drum,
Since the exposed portions of the reinforced thermosetting resin sheet are bonded together, excellent honeycomb structures can be manufactured continuously without the need for special techniques or equipment.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a honeycomb structure obtained using the honeycomb body of the present invention, FIG. 2 is a perspective view showing the manufacturing process of the honeycomb body of the present invention, and FIG. 3 is a side view thereof. Fourth
The figure shows the cut pieces+I? This is part y11 showing the 1L-state. (1)...Resin sheet, (2)...Lascross (
Reinforced fiber base material), (3)... #Il fiber reinforced thermosetting resin composition sheet, (4)... Release sheet), (5)...
・Structure for honeycomb, (6)...Cylindrical drum, (10
)...honeycomb-structured remains. 1 Figure 2

Claims (2)

[Claims] (1) A release sheet is pasted at predetermined intervals on both sides or one side of an uncured fiber-reinforced thermosetting resin composition sheet with double-sided adhesiveness, and this is wound to form the fiber-reinforced thermosetting resin composition. A honeycomb structure made by gluing the exposed parts of sheets. (2) Attach release sheets at predetermined intervals to both sides or one side of an uncured fiber-reinforced thermosetting resin composition sheet with double-sided adhesiveness, and while winding this around a drum, the above-mentioned fiber-reinforced thermosetting resin composition is applied. 1. A method for manufacturing a honeycomb structure, which comprises bonding exposed portions of a material sheet.