JPS61205124A - Honeycomb structure and manufacture thereof - 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 [Field of Industrial Application] The present invention relates to a honeycomb structure with excellent sound insulation and heat insulation properties, which is used for the body of an automobile or an airplane, or as a construction material, and a method for manufacturing the same.

[Conventional technology and its problems]

The honeycomb structure described above is generally manufactured by bonding end plates to both end faces of a honeycomb made of folded fiber sheet paper using an adhesive, but using an adhesive in this way requires a curing oven and time to harden. However, the equipment was expensive and the workability was poor, which was inconvenient for mass production.The present invention solves these problems and eliminates the above drawbacks by using a prepreg sheet made of an ultraviolet curable resin composition. It is.

[Means for solving problems]

The present invention comprises a prepreg sheet made of an ultraviolet curable resin composition, and this prepreg sheet is brought into contact with the end face of the honeycomb, and then the prepreg sheet is irradiated with ultraviolet rays to cure the prepreg sheet in a short period of time. It manufactures the structure. In the present invention, prepreg sheets are not necessarily impregnated sheets, and include chopped strand sheet compounds and the like. This chopped strand sheet compound is made by interposing chopped strands between two resin films coated with ultraviolet curable resin and pressing them into a sheet (in this case, the chopped strands are matte). It may be in the form of a sheet), or it may be a sheet formed by kneading chopped strands and an ultraviolet curable resin and extruding it onto a resin film. The end face of the honeycomb means the face where the pores are open.

In this embodiment, the prepreg sheet is made of epoxy resin, but a prepreg sheet made of resin such as unsaturated polyester may also be used.゛The above-mentioned ultraviolet curable resin composition includes a compound having a photopolymerizable group in addition to the epoxy resin, such as an acryloyl group, a methacryloyl group, an acrylamide group, a maleic acid diester group, an allyl group, a vinyl ether group, a vinylamino group, Examples include compounds having a glycidyl group, an acetylenically unsaturated group, and the like.

[For production]

Once the prepreg sheet made of the above-mentioned ultraviolet curable resin composition is irradiated with ultraviolet rays, it cures in a short time of less than one minute, so it has good workability, is easy to incorporate into an automatic production line, is suitable for mass production, and has low equipment costs. It is something that lives in

〔Example〕

The ultraviolet curable epoxy resin 1 as shown in the first diagram contains an epoxy resin 2, an epoxy resin 3, and an organic silicon compound 4.
Mix at 00°C, add photo-curing catalyst 5 and make 1
It was mixed at 00°C.

Above resin 2.3. The materials and mixing ratio of compound 4 and catalyst 5 are as follows.

■Ultraviolet curable epoxy resin composition 1 ・Resin 2z Epicoat 828 12 parts by weight (N-clarified shell epoxy ■, bisphenol 8 type epoxy Jizukiji) ・Resin 3: Ebikoat 1001 48
Parts by weight (〃〃〃) Compound 4: KBM202 2 parts by weight ((8M
Chemical Industry, 5 phenyldimethoxysilane) Photo-curing catalyst 5: UVE-10140, 6 parts by weight (General Electric Co., 50% propylene carbonate solution of triarylsulnenium salt) The above ultraviolet curable epoxy resin composition 1 was prepared as a prepreg. In order to make the sheet 6, it is placed in an impregnating bath 10 in a room free from ultraviolet rays as shown in the second diagram, and while the impregnating bath 10 is heated to about 100° C. by a heating device 11, ultraviolet rays such as roving cloth are transmitted. A base material 12 made of a material is sent into the impregnation tank 10,
Next, the impregnated base material 12 is fed while applying a release paper 13 to the back surface thereof, and is wound into a coil to form a product.

Examples of the material for the base material 12 include the following.

■Glass fibers (there are various processing forms; for example, a surface mat as a monofilament cloak, a strand as a long fiber mat), ■Organic fibers (synthetic fibers such as linear polyester fibers, nonwoven fabrics of synthetic fibers), etc. are used.

Next, to manufacture the honeycomb structure, as shown in the third figure, the prepreg sheet 6 is punched into a donut-shaped master 6a.
A primer 20 made of a similar ultraviolet curable resin composition is applied thereon by screening, stenciling, tracing, or the like. Note that this primer 20 is not necessary when the prepreg sheet 6 itself has adhesive properties. Alternatively, the prepreg sheet 6 may be preheated with hot air or the like to partially melt it and give it adhesive properties.

In this way, the master 6a of the prepreg sheet 6 is brought into contact with both end surfaces of the honeycomb 21 formed of paper or the like, and a mold 23 made of ultraviolet-transparent quartz glass coated with a release agent 22 on the inner surface is pressed from the outside of the master 6a. When the ultraviolet ray 24 is irradiated from the outside, the master 6a and the primer 20 become 1
It hardens in a short time of less than 1 minute, and is fixed to the honeycomb 21 with a predetermined dimension, resulting in a honeycomb structure.

Although both end faces of the honeycomb structure shown in the third figure are flat, they do not necessarily have to be flat. One side may be chevron-shaped like the honeycomb 30 shown in FIG. 4(A), or it may be a curved surface like the honeycomb 31 shown in FIG. These are hardened by bringing them into contact with each other.

〔effect〕

As described above, according to the present invention, if the prepreg sheet is irradiated with ultraviolet rays, the prepreg sheet will harden and adhere to the honeycomb in a short period of time, resulting in good workability and low equipment costs.
It is suitable for mass production, allows inspection of the adhesion state between the prepreg sheet and the honeycomb through the prepreg sheet, and makes it possible to obtain a honeycomb structure of any shape by making the prepreg sheet flexible.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the method for producing an ultraviolet curable resin composition according to the present invention, FIG. 2 is an explanatory diagram of the method for producing the prepreg sheet, FIG. 3 is an explanatory diagram of an example of the method of the present invention, and FIG. Figures (a) and (o) are explanatory diagrams of other examples of honeycomb structures. 6.32.33...Prepreg sheet, 21
, 30, 31...honeycomb. Notebook 1 color, etc. 2 items ρ Noah S: 3rd procedure amendment (voluntary) June 24, Showa ω 1999 [I 1, Indication of the case Showa ω 2016 Patent Application No. 045992 2, Title of invention Honeycomb structure and its manufacture Method 3: Relationship with the case of the person making the amendment Patent applicant address: 1456 Hazama-cho, Hachioji-shi, Tokyo Name: ThreeBond Co., Ltd. Specification and drawings. 6. Contents of correction (1) Section 21 in Figure 3 will be deleted as shown in the attached sheet. (2) Insert "W, 5 as shown" next to "shita" on page 6, line 6 of the specification. (3) Insert "Figure 5 is a sectional view of the cam" next to "Diagram" on page 7, line 13. (4) Add Figure 5 as shown in the attached sheet. Stop 3Ω

Claims (2)

[Claims] (1) Manufacturing a honeycomb structure by forming an uncured prepreg sheet from an ultraviolet curable resin composition, bringing this prepreg sheet into contact with the end face of another honeycomb, irradiating it with ultraviolet rays, and curing this prepreg sheet. Method. (2) A honeycomb structure made of an ultraviolet curable resin composition in which the end faces of the honeycomb are cured with ultraviolet rays.