JPS59159332A - Prepreg material 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 The present invention relates to a prepreg material and a method for producing the same.

Buriplnoglory is made of fiber 1 reinforced plastic (hereinafter referred to as
Used as a molding material when molding FRP)
It is something that

As a prepreg material 1 such as A, a so-called unidirectional pre-preg material is conventionally known. That is, this prepreg material is made of prepreg supported on one side of the front pattern paper. The prepreg is made by impregnating reinforcing fibers arranged parallel to each other in a sea 1 shape with a B-stage thermosetting resin.

In some cases, a scrimx is attached to the prepreg on the side opposite to the side supporting the front pattern paper in order to add a slight reinforcing effect in a direction perpendicular to the direction in which the reinforcing 1N navy blue is arranged.

In addition, the above-mentioned front pattern paper prevents the arrangement of the reinforcing In from being disordered due to external force being applied to the prepreg material.
: There is a device that prevents reinforcing fibers from fraying at the cut edges when prepreg material is cut.

Therefore, in order to mold FRP using Presoleg, the prepreg material is cut according to the shape and dimensions of the RP to be molded, the release paper is peeled off, and the prepreg is wound around a mandrel. This is done by heating and pressurizing the molds, or by stacking them in a mold and heating them. The release paper is often peeled off during molding and thrown away without being reused. However, this is a huge waste and is one of the reasons why prepreg materials are expensive.

In other words, when release paper absorbs moisture during storage or transportation of prepreg materials, it stretches or curls, resulting in reinforcement m
The arrangement of tIi will be disordered, and the scrim cloth will peel off and rise or sag from the prepreg surface, so to prevent this from happening and to make it easy to peel off during molding, the surface is coated with a release material such as silicone resin. It has been molded. Furthermore, in order to uniformly apply such resin processing, a sealant is applied to the surface of the paper prior to resin processing. In order to more completely prevent moisture absorption, aluminum γ1 may be interposed between the plug layer and the resin layer. Therefore, the release paper is L1'! Compared to paper, it is very expensive as a consumable item.

The present invention provides -1- of the conventional prepreg 4A material using release paper.
It solves the writing defects, is not only low-priced, but also retains its shape (I
[The purpose of the present invention is to provide an excellent prepreg material and a method for manufacturing the same.]

To achieve the above object, the present invention provides a synthetic resin film which has been subjected to mold release on at least one side, and the - side (J supported, parallel to H and sea 1
The reinforcing fibers are arranged in the shape of 1] and 13-stage (for example, [Plus Book Industrial Dictionary-1, p. 107, 1973
Heat curing f1 (September 25, 2015, published by Net IT Industry Research Association)
There is a material C characterized by a prepreg material which is a prepreg impregnated with a resin. In addition, in the present invention, J3 is manufactured using the Gino method for producing the above-mentioned Brizo L/G materials.
, a step of sandwiching reinforcing fibers arranged parallel to 77 and in a sea 1 shape and a 13-stage thermosetting resin between a second release paper and heating under pressure to obtain yellowtail 11 nog; a step of peeling off and recovering the first release paper from the first release paper;
A step of laminating a synthetic resin film that has been subjected to a release process on at least one side to the prepreg surface from which the release paper has been peeled off, and a step of recovering the second release paper by peeling it off. A method of manufacturing characterized prepreg materials is provided.

To explain one embodiment of the present invention, in the drawing, while continuously running a strip-shaped lower release paper 1 pulled out from a roll body and coated with a B-stage thermosetting resin on the - side, the above-mentioned - In other words, on the resin-coated surface, reinforcing fibers 2 in the form of strands (single number of white fibers to tens of thousands of fibers) pulled out from a large number of packages (not shown) are placed on the resin-coated surface, and the fiber axis is the release paper 1.
Arrange them parallel to each other and in a sea pattern in the running direction, that is, the longitudinal direction.

Next, on the reinforcing fibers 2 arranged on the release paper 1, place 8-
The band 5-shaped upper release paper 3 coated with the thermosetting resin of the stage is stacked so that the above-mentioned - side and the resin-coated side face the reinforcing line H2.

Next, the release paper 1.3 sandwiching the reinforcing fibers 2 is passed through heated impregnated rolls 4 installed in multiple stages to spread out the reinforcing wire M2 in the form of a strand, and at the same time, the release paper 1.3 is coated with the material 11. The reinforcing fibers 2 are impregnated with the resin being softened to improve its fluidity. In this way, a so-called -h-tropic prepreg is obtained by impregnating reinforcing fibers arranged in the -1j direction, parallel to H and toward sea 1 with a B-stage thermosetting resin.

Part J: Eel prepreg is usually 0.02-1mm
.

Preferably, the thickness is 0.03 to 5 mm.

Next, peel off the + side release paper 3 from the prepreg,
[1-Recover by winding up into a roll.

Next, the lower release paper 3 is peeled off and the synthetic resin film 5 which has been released from the roll body is placed on the surface of the prepreg with one side facing the prepreg and pressed. [Press and paste with l-ru 6.

-〇- Next, after recovering the lower front pattern paper 1 by peeling it off, the prepreg and the synthetic resin film 5 are wound around a core 7 of the paper tube. Prior to winding, a scrim cloth may be attached to the prepreg surface from which the front pattern paper 1 has been peeled off so that a slight reinforcing effect is also applied in a direction perpendicular to the direction in which the reinforcing fibers M2 are aligned. "Zono": Una Scrimk [l
The base is made of plain weave or satin weave of high-strength, high-modulus fibers such as carbon fibers, glass fibers, and h-machine high-modulus fibers (e.g., polyaramid fibers). If the thickness is 0.02-0
．． 15mm, preferably 0.03-0. In+m.

Area weight: 10-90q7/m2, preferably 20-60q/m2
m2 and is made of glass fiber,
Thickness 0.01-0.1mm, preferably 0, 02=0
．． 05mm, eye 110-800/m2,
Preferably it is 15-400/m2.

In the above, the thermosetting resin applied to both the upper and lower release papers is, for example, an epoxy resin, an unsaturated polyimide resin, a polyimide resin, or a phenol resin. These resins may be applied to the release paper in advance, or may be applied using a reverse roll or the like immediately after being pulled out from the roll during production. The amount of resin applied to the release paper is 20% of the resin content in the prepreg.
It is preferable to adjust the amount to 70% by weight, preferably 20 to 60% by weight. The coating amount per m2 of release paper is 1O-350q, preferably 20-300g, and the coating thickness is 0.008-0.3mm, preferably 0.0
2~0.25mn+rAl. At this point, the amount of resin in the release paper under -4- may be the same or may be different. When using release papers with different amounts of resin, the resin amount of the upper release paper 3 should be 20% higher than that of the lower release paper 1.
It is preferable to increase the amount by about 80%.

In addition, in the present invention, reinforcing fibers drawn parallel to H in a sheet-like manner are immersed in a thermosetting resin bath diluted with an appropriate solvent, pulled up, and heated to remove the solvent and remove the resin from B- By supplying after staging, it is possible to use both the upper and lower release papers that are not coated with resin. In short, the reinforcing fibers and the B-stage thermosetting resin may be sandwiched between two pieces of release paper.

The release paper is made of paper whose surface has been subjected to a release process.

Such release paper has a thickness of, for example, 0°05-0.
A coating layer of a mouth sealant such as clay, starch, polyethylene, or polyvinyl alcohol is applied to both sides of paper such as kraft paper, roll paper, glassine paper, etc. approximately 2 mm thick, and each layer is coated with a silicone-based or non-silicone sealant. A silicone-based mold release agent, preferably a condensation reaction type or addition reaction type silicone of polydimethylsiloxane and polydimethylhydrone siloxane, is applied. By using a release paper made by laminating aluminum foil between the sealing agent coating layer and the release agent coating layer, it is possible to prevent the release paper from elongating during pressurization and heating with an impregnated roll, and to provide reinforcement. This is preferable because it is possible to almost completely prevent the disorder of the 11 ft alignment.

The reinforcing fibers include, for example, high-strength, high-modulus fibers such as carbon mH, glass fibers, organic high-elastic fibers M (e.g., polyaramid, etc.), silicone nonobide II (f), boron fibers, alumina fibers, etc. As such reinforcing fibers, only one type of reinforcing fiber may be used for the same prepreg, or different types of reinforcing IIi navy blue may be used regularly or irregularly arranged. For example, even if the same carbon m-fiber is used, a high-strength type and a high-elasticity type can be used together.

The heating temperature of the impregnated roll depends on the type of resin, etc.
The temperature is 80-180°C, preferably 90-150°C. In addition, the pressurizing force is approximately several kilograms per 10111 in terms of linear pressure. Q: It is not necessary to set the impregnating rolls in multiple stages (it is not necessarily necessary to roll them in one stage; it is also possible to use a heating plate instead of the lower roll).

The synthetic resin film is made of synthetic polymers such as poly]-dylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyamide, and polyester, and has a thickness of about 0.01 to 0.5 mm. ing. Among them, those made of polyethylene have a low θf() because they are inexpensive. The surface of these synthetic resin films is subjected to a physical treatment such as ]] Rono discharge treatment, plasma treatment, or a mold release process by applying an adhesive such as acrylic, vinylidene chloride, or polyester adhesive. ing. Such a mold release process may be applied only to one side of the synthetic resin film, or may be applied to both sides. When applying to both sides, make sure that there is a difference in mold release on the front and back sides, and attach the side with a higher degree of molding to the prepreg.

In addition, if you make the end of this synthetic resin film a little longer than the prepreg, so that when the prepreg material is wound around the core in a [']-le shape, the extra end will wrap around the []-le shape. JF-4 is preferable because it can prevent the prepreg material from changing over time due to exposure to the atmosphere.

As explained above, the prepreg monthly yield of the present invention maintains the shape of the prepreg by supporting the prepreg on one side of the synthetic resin film, and is inexpensive because it does not use expensive release paper. . Moreover, since the synthetic resin film has extremely good moisture resistance 14, the change in the X4 method h< due to moisture absorption by the synthetic resin film becomes more and more 4ζ.
It is possible to prevent the arrangement of reinforcing fibers from becoming disordered during warranty or transportation.

Both the production I I￥C and upper F R1 patterns will be collected, so you can leave them as they are or use them as they are in 13-
The thermosetting resin of the stage can be applied and used repeatedly, and the pre-preg I
The price of Aoz1 will become cheaper.

Example Carbon fiber navy blue trading card manufactured by Toshi Co., Ltd. 1-300 (
6000 single yarns) in one direction parallel to Zj and sea 1~
The surface of the surface 1 = Yuka Seal Yru T Poxy Co., Ltd.'s boxy resin "'■ Pi]-l~" 828 and the epoxy resin "-r Pico-1~" 1004 manufactured by the same company. , Y boron fluoride monoedylamine (curing agent) in a small ratio of 10
: 10 : 1 in methyl ethyl ketone, passed through a resin bath containing about 60% by weight of the resin component, pulled up, and blown with hot air at 150°C until the content of methyl ethyl ketone was 1 to 1. It was dried until it became less than .5% by weight.

Next, the resin-impregnated trading card was sandwiched between two sheets of release paper not coated with resin, and passed through an impregnated roll at a temperature of 110° C. and heated under pressure to obtain a prepreg.

Next, one of the two release papers was peeled off and collected, and then a polypropylene film with a thickness of 0.075 mm, which had been subjected to Rona discharge treatment only on the negative side, was placed on the prepreg surface from which the release paper had been peeled off. They were placed one on top of the other with their faces facing each other, and pressed together using a bracelet.

Next, the remaining release paper was peeled off and collected, and then the prepreg and the polypropylene film were wound onto a paper tube. The thickness of the prepreg above is approximately 0.12n+
m, and the content of ゛1~Recapa was about 63% by weight, lζ.

Next, the prepreg was pulled out from the roll and cut into pieces with a length of 1000 mm and a width of 5 mm to prepare test pieces. This test piece was tested at a temperature of 25°C and a humidity of 75%R.
It was left in a room at room temperature H, and the floating of the prepreg from the polypropylene film and the occurrence of curling of the prepreg were observed, but no abnormality was observed even after leaving it for 4T. Ta. Considering that in the conventional prepreg monthly yield using release paper, 7 J-ru is generated in about 30 minutes, and the prepreg starts to float in about 60 minutes, the prepreg material of the present invention has excellent shape retention. It turns out that he has excellent sex.

[Brief explanation of the drawing]

The drawing is a schematic side view showing one embodiment of the present invention in which a method according to the invention is carried out. 1.3: Release paper 2: Reinforcing fiber 4: Impregnated roll 5: Synthetic resin film 6: Press roll 7: Winding core Patent applicant Toshi Co., Ltd. 14-

Claims (2)

[Claims] (1) A synthetic resin film with a release side T formed on at least one surface, and B-
A prepreg material covering a stage and a prepreg impregnated with a thermosetting resin. (2) an iL culm in which reinforcing fibers arranged parallel to η in a sheet shape and an 8-stage thermosetting resin are sandwiched between first and second release papers, and a prepreg is obtained by heating under pressure; a step of peeling off and recovering the first release paper from the prepreg; and a step of laminating a synthetic resin film having a release side T on at least one side on the prepreg surface from which the first release paper has been peeled off. . A method for producing a prepreg material, comprising the steps of peeling off and recovering the second release paper.