JP5624423B2 - Prepreg tape roll - Google Patents

Description

The present invention relates to a prepreg tape wound body in which a prepreg composite tape formed by attaching a peelable film to a photocurable prepreg tape is wound.

Conventionally, photocurable prepreg tapes used for repairing, reinforcing, waterproofing lining materials, etc. for pipes and various structural members are photopolymerization initiators, thickeners, etc. for polymerizable resins such as unsaturated polyester resins. It is made by impregnating a substrate such as a glass cloth or a non-woven fabric with a photocurable resin composition obtained by blending and thickening.
Further, as shown in FIG. 6, this photo-curable prepreg tape (hereinafter also simply referred to as a prepreg tape) is in a state of a composite tape 130 having a peelable film 120 attached on both sides thereof, and the resin component is not yet present. Stored in a cured state. As the film 120, it is common to use a resin film such as a transparent plastic film, which is light transmissive (particularly, a film having sufficient light transmittance at the curing wavelength of the prepreg tape).

As typical procedures for bonding the prepreg tape 110 of the composite tape 130 to the adherend, there are the following procedures. First, one side of the film 120 on both sides of the prepreg tape 110 (hereinafter also referred to as the first film 121) is peeled off from the prepreg tape 110, and one side of the prepreg tape 110 exposed by peeling off the first film 121 is attached. Press and stick to. Next, in this state, the light (the resin component of the prepreg tape 110 is applied to the prepreg tape 110 via a film 120 (hereinafter also referred to as a second film 122) that is still attached to the prepreg tape 110. After the resin component of the prepreg tape 110 is cured, the surface side film is peeled off from the prepreg tape 110.
The second film 122 can be easily peeled off from the prepreg tape 110 with a weak force when the prepreg tape 110 cured by light irradiation loses the adhesive force.

  The first film 121 is subjected to silicone treatment only on the surface in contact with the prepreg tape 110 and can be easily peeled off from the uncured prepreg tape 110. On the other hand, the second film 122 is not subjected to a treatment (silicone treatment or the like) for ensuring the peelability from the uncured prepreg tape 110, and the adhesion to the uncured prepreg tape 110 is secured. The second film 122 is kept attached to the prepreg tape 110 by the adhesive force of the prepreg tape 110 until the prepreg tape 110 is cured by light irradiation.

By the way, storage of the composite tape 130 needs to ensure light shielding properties in order to maintain the uncured state of the resin component of the prepreg tape. In general, long composite tapes are wound and stored in a light-shielding container such as a light-shielding bag. When the composite tape 130 is wound (wound body), the films 120 on both sides of the prepreg tape 110 serve to prevent direct contact and adhesion between the prepreg tapes 110. Work can be done easily.
However, as shown in FIG. 7, when the composite tape 130 having the conventional configuration is stored in a wound state, the composite tape 130 is wound due to a difference in peripheral length between the inner peripheral film and the outer peripheral film of the composite tape 130. A curl may occur. Since the curl of the composite tape 130 may affect the workability of adhesion when the prepreg tape 110 is adhered to the adherend, there is a demand for preventing this occurrence.

In Patent Document 1, in order to prevent generation of wrinkles in the production process of a curable prepreg, a prepreg heated and dried until the resin reaches a B stage (semi-cured) is 20 to 20 ° C. lower than the temperature at which the resin viscosity is lowest. A technique for heating to a temperature lower by 40 ° C. is disclosed.
However, the technique disclosed in Patent Document 1 is to soften the prepreg after heat drying by reheating, thereby preventing wrinkle generation when passing through the roll. It can not prevent.

JP 2006-193586 A

In actuality, there is currently no suitable technique capable of preventing the occurrence of curling in the production of the wound body of the composite tape 130.
An object of this invention is to provide the prepreg tape winding body which can prevent generation | occurrence | production of a winding fist when it makes a winding state in view of the above-mentioned situation.

In order to solve the above problems, the present invention provides the following configuration.
The present invention is a prepreg tape wound body obtained by winding a prepreg composite tape, and the prepreg composite tape has a light-peelable peelable film attached to only one side of the photocurable prepreg tape. The photocurable prepreg tape is constituted by impregnating a substrate made of glass fiber with a liquid photocurable resin composition, and the photocurable resin composition is made of an epoxy acrylate resin, and includes thermoplastic resin particles. The film is blended as a gelling agent and thickened, and the film provides a prepreg tape wound body in which silicone treatment is performed only on the surface opposite to the sticking surface in contact with the photocurable prepreg tape.
The film is preferably attached to the outer peripheral side of the photocurable prepreg tape .
The film of the prepreg composite tape is preferably a polyethylene terephthalate film, a polyethylene film, a polypropylene film, a polyvinyl chloride film, or a nylon film.

According to the present invention, it is possible to prevent the occurrence of curl when the prepreg composite tape is wound.
In addition, according to the present invention, since the film is attached to only one side of the photocurable prepreg tape, the cost can be easily reduced as compared with the composite tape having the conventional structure in which the film is attached to both sides of the prepreg tape. realizable. And this invention can also implement | achieve easily the winding diameter reduction with respect to the length of a prepreg tape of the winding body which made the prepreg composite tape the winding state.

It is a figure which shows the prepreg composite tape of one Embodiment which concerns on this invention, and a prepreg tape winding body. It is sectional drawing explaining the operation | work (adhesion construction method) which adheres and fixes the photocurable prepreg tape of the prepreg composite tape of FIG. 1 to an adherend, and shows the state which contact | abutted the prepreg composite tape on the adherend surface. It is sectional drawing explaining the operation | work (adhesion construction method) which adheres and fixes the photocurable prepreg tape of the prepreg composite tape of FIG. 1 to the adherend, and made the uncured photocurable prepreg tape adhere to the adherend. Indicates the state. It is sectional drawing explaining the operation | work (attachment construction method) which adheres and fixes the photocurable prepreg tape of the prepreg composite tape of FIG. The state where is removed. It is a figure explaining the other aspect of the prepreg tape winding body which concerns on this invention. It is a figure explaining the structure of the composite tape of a conventional structure. It is a figure explaining the curl which generate | occur | produces when the composite tape of FIG. 6 is made into a winding state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the prepreg composite tape 10 described here is a light obtained by impregnating and thickening a base material (not shown) such as a glass cloth or a nonwoven fabric with a liquid photocurable resin composition. It has a schematic configuration in which a peelable film 12 is attached (attached) only to one side of a curable prepreg tape 11 (hereinafter also simply referred to as a prepreg tape).

The photocurable resin composition of the prepreg tape 11 of the prepreg composite tape 10 is obtained by blending a photopolymerization initiator, a thickener, and the like with a polymerizable resin such as an unsaturated polyester resin.
In this prepreg composite tape 10, the photocurable resin composition of the prepreg tape 11 is in an uncured state. The prepreg tape 11 and the prepreg composite tape 10 have high flexibility when the photocurable resin composition is in an uncured state, and follow the surface shape of the adherend that adheres (adheres) and fixes the prepreg tape 11. It can be easily secured and adherence to the adherend surface.

  The photocurable resin composition has a property of being cured by light irradiation. As this photocurable resin composition, for example, a well-known one that is cured by irradiation with ultraviolet rays can be employed. Moreover, as a photocurable resin composition, what hardens | cures by irradiation of infrared rays and what hardens | cures by irradiation of visible light are also employable.

Typical examples of the polymerizable resin of the photocurable resin composition include an unsaturated polyester resin capable of radical polymerization and an epoxy resin capable of cationic polymerization. However, radicals are preferred because a stable thickener is easily obtained and easy to handle. A polymerizable resin is preferably used.
The radical polymerizable resin is a liquid resin in which a compound having a double bondable unsaturated group capable of radical polymerization is dissolved in a liquid vinyl monomer.
Examples of liquid resins capable of radical polymerization include unsaturated polyester resins, epoxy acrylate resins, urethane acrylate resins, and allyl ester resins.

  The unsaturated polyester resin used as a radically polymerizable liquid resin is a condensation product (unsaturated polyester) obtained by an esterification reaction between a polyhydric alcohol and an unsaturated polybasic acid (and a saturated polybasic acid if necessary). ) Is dissolved in a liquid vinyl monomer such as styrene.

As the photopolymerization initiator used for the radical polysynthetic resin, one that generates radicals by light irradiation, polymerizes and crosslinks a radically polymerizable liquid resin, and cures the entire composition is used. Examples of polymerization initiators that generate radicals upon irradiation with light include known photopolymerization initiators such as acetophenone, benzophenone, and acylphosphine oxides. Specific examples include 2,4,6-trimethylbenzoyldiphenyl. Examples include phosphine oxide, 1-phenyl-2-hydroxy-3-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, and 2-hydroxy-2-methyl-1-phenylpropan-1-one.
One of these polymerization initiators may be used, or two or more thereof may be used in combination.

  Examples of the method for thickening the radical polymerizable resin composition include a method of thickening a jelly resin by adding thermoplastic resin particles as a gelling agent and a method of thickening an acrylate resin having a hydroxyl group with an isocyanate compound. Well known methods can be used. As the thermoplastic resin particles used as the thickener, polymers and copolymers having acrylic acid ester, methacrylic acid ester, aromatic vinyl compound and the like as monomers are used.

As a base material of the prepreg tape 11, a material (fiber base material) composed of fibers that are substantially transparent to light in the photosensitive wavelength region of the photopolymerization initiator contained in the photocurable resin composition is suitably used. Can be used. As the constituent fiber (reinforcing fiber) of the fiber base material, glass fiber which is excellent in terms of light transmittance and strength and is inexpensive can be suitably used. In addition to this, aramid fiber, acrylic fiber, polyester fiber, polyethylene fiber, nylon fiber, and the like can be used as the reinforcing fiber constituting the fiber base material. One type of fiber to be used may be selected, or a plurality of types may be selected.
Moreover, as a form of a fiber base material, a chopped strand mat, roving, a textile form etc. are mentioned, for example.

  The film 12 is a plastic film that is substantially transparent to light in the photosensitive wavelength range of the photopolymerization initiator contained in the photocurable resin composition. Here, a film made of polyethylene terephthalate (PET) is used. ing. However, the material of the film 12 is not limited to polyethylene terephthalate, and for example, polybutylene terephthalate can also be used. As the film 12, a polyester film, a nylon film, a vinylon film, a polycarbonate film, a polyethylene film, a polypropylene film, a polyvinyl chloride film, or the like can be used.

However, as the film 12, a polyethylene terephthalate film is suitable because it has a small elongation. Further, as the film 12, a stretched film of polyethylene terephthalate can be used particularly preferably.
Polyester film, nylon film, and polypropylene film, for example, as a polymerizable resin for a photocurable resin composition, are condensed by an esterification reaction between a polyhydric alcohol and an unsaturated polybasic acid (and a saturated polybasic acid if necessary). When a product containing styrene such as an unsaturated polyester resin in which a product (unsaturated polyester) is dissolved in styrene is used, it may swell under the influence of styrene and cause a slight elongation. On the other hand, the polyethylene terephthalate film is hardly affected by swelling with respect to styrene, and can be suitably used in terms of dimensional stability.

In the prepreg composite tape 10, the film 12 is adhered to the prepreg tape 11 by the adhesive force of the uncured prepreg tape 11.
The surface of the film 12 opposite to the prepreg tape 11 (hereinafter referred to as the surface 12a) is subjected to a silicon treatment. The entire surface 12a of the film 12 is a surface treated with silicone. The film 12 does not easily adhere to the prepreg tape 11 even when the uncured prepreg tape 11 comes into contact with the surface 12a, and is easily peelable even if it adheres. .
Accordingly, when the prepreg composite tape 10 is wound as shown in FIG. 1, the prepreg tape 11 that comes into contact with the surface 12a of the film 12 does not easily adhere to the film 12 and can be easily adhered. Can be peeled off.

On the other hand, the back surface (sticking surface 12b) opposite to the front surface 12a of the film 12 is not subjected to a treatment (silicone treatment or the like) for ensuring peelability from the prepreg tape 11. The adhesive state of the film 12 is stably maintained by the adhesive force of the prepreg tape 11 on the prepreg tape 11 on the adhesive surface 12b side.
For this reason, when the prepreg composite tape 10 is pulled out from the prepreg tape wound body 21 in which the prepreg composite tape 10 is wound, the adhesive surface of the prepreg tape 11 in contact with the surface 12a of the film 12 is attached. There is no inconvenience of being peeled off from the prepreg tape 11 on the 12b side. The prepreg composite tape 10 can be easily pulled out from the prepreg tape winding body 21 while the film 12 is kept integrated with the prepreg tape 11 on the sticking surface 12b side.

A prepreg tape winding body 21 (hereinafter also simply referred to as a winding body) shown in FIG. 1 is obtained by winding a prepreg composite tape 10.
The wound body 21 illustrated in FIG. 1 is obtained by winding the prepreg composite tape 10 in a direction in which the film 12 is wound in the direction in which the film 12 is positioned on the outer peripheral side of the curve of the prepreg tape 11. For example, the prepreg composite tape 10 can be wound around a core to form a wound body.
The wound body 21 is in a state in which the film 12 is exposed over the entire outer periphery of the wound body 21, and the exposed portion of the prepreg tape 11 includes end faces on both sides in the winding axis direction of the prepreg composite tape 10 and the outer periphery of the wound body 21. It is limited to the end surface of the winding end located in the area. For this reason, the wound body 21 has an advantage that dust and the like can be prevented from adhering to the surface of the prepreg tape 11 opposite to the film 12 (surface 11a of the prepreg tape 11).

As a wound body in which the prepreg composite tape 10 is wound, the prepreg composite tape 10 is wound up in such a direction that the film 12 is positioned on the inner peripheral side of the prepreg tape 11 as shown in FIG. It is good also as what was made into the winding state (winding body 22).
However, in terms of ensuring the handleability of the wound body, the wound body 21 illustrated in FIG. 1 is more advantageous because the exposed portion of the prepreg tape 11 is smaller than the wound body 22.

2, 3, and 4 are diagrams illustrating an example of an operation for bonding and fixing (fixing) the prepreg tape 11 of the prepreg composite tape 10 to the adherend 30.
In the figure, the adherend 30 illustrates a concrete structure, but the adherend 30 is not limited to a concrete structure, and may be appropriately selected from, for example, a metal plate and a glass plate.

  The operation of bonding and fixing the prepreg composite tape 10 to the adherend 30 of the prepreg tape 11 described here is first performed on the side opposite to the film 12 of the prepreg tape 11 of the prepreg composite tape 10 as shown in FIGS. The surface 11a is closely adhered to the surface of the adherend 30, and the photocurable resin composition of the prepreg tape 11 is cured by light irradiation while maintaining this state.

  The film 12 is a light-transmitting plastic film, more specifically, as described above, made of a plastic that is substantially transparent to light in the photosensitive wavelength region of the photopolymerization initiator contained in the photocurable resin composition. It is a film. For this reason, if the prepreg composite tape 10 is irradiated with the light H including the photosensitive wavelength region of the photopolymerization initiator from the film 12 side of the prepreg composite tape 10 in a state where the prepreg tape 11 is in close contact with the adherend 30. The light H can be irradiated (transmitted) through the film 12 to the prepreg tape 11, and the photocurable resin composition of the prepreg tape 11 can be cured.

As shown in FIG. 1, the portion of the prepreg composite tape 10 drawn from the wound body (the wound body 21 or the wound body 22) has a configuration in which the film 12 is attached to only one surface of the prepreg tape 11. There is nothing that covers the surface 11a of the prepreg tape 11 opposite to the film 12, and the surface 11a of the prepreg tape 11 is exposed.
Accordingly, when the prepreg composite tape 10 is pulled out from the wound body and used for bonding and fixing the prepreg tape 11 to the adherend 30, the prepreg tape 10 can be made of a prepreg tape like the conventional composite tape 130 illustrated in FIG. 6. There is no need to peel off one of the double-sided films from the prepreg tape to expose the prepreg tape. Since the prepreg composite tape 10 pulled out from the wound body can start the work of bringing the surface 11a of the prepreg tape 11 into close contact with the adherend 30 without performing the work of peeling off the film as in the case of a composite tape having a conventional configuration, Compared to the composite tape having the configuration, the process of bonding and fixing the prepreg tape 11 to the adherend 30 can be reduced, and the working time can be shortened.

When the curing of the photocurable resin composition of the prepreg tape 11 by light irradiation H is completed, the film 12 is then peeled off from the prepreg tape 11. Thereby, the adhesive fixing of the prepreg tape 11 to the adherend 30 is completed.
The film 12 can be easily peeled off from the prepreg tape 11 with a weak force when the prepreg tape 11 is cured by light irradiation and loses adhesive force.

  The composite tape 130 of the conventional configuration requires removal and disposal of the film peeled off from both sides of the prepreg tape, and the prepreg composite tape 10 has the film 12 attached to only one side of the prepreg tape 11. Since it is a structure, compared with the composite tape 130 of the conventional structure, the amount of the film peeled off from the prepreg tape can be halved. For this reason, the prepreg composite tape 10 also contributes effectively to a reduction in the amount of waste generated due to the work of fixing the prepreg tape 11 to the adherend 30.

Since the prepreg composite tape 10 has a configuration in which the film 12 is adhered to only one surface of the prepreg tape 11, the thickness of the entire film including the film relative to the thickness of the prepreg tape (the entire prepreg composite tape) is illustrated in FIG. It can be made smaller than the composite tape 130 of the conventional configuration. For this reason, the prepreg composite tape 10 can easily realize a reduction in the circumferential length difference between the inner peripheral side and the outer peripheral side when the wound body is made, compared to the composite tape 130 having the conventional configuration illustrated in FIG. It is possible to easily prevent the occurrence of curl when used as a wound body.
Further, the prepreg composite tape 10 can easily realize cost reduction because the film can be saved as compared with the composite tape 130 having a conventional configuration in which films are attached to both surfaces of the prepreg tape.

In addition, the prepreg composite tape 10 can easily reduce the winding diameter with respect to the length of the prepreg tape when the prepreg composite tape 10 is a wound body, as compared with the composite tape 130 having the conventional configuration.
The reduction of the winding diameter with respect to the length of the prepreg tape when the prepreg composite tape 10 is wound may be able to suppress the thickness of the entire film including the film with respect to the thickness of the prepreg tape (the entire prepreg composite tape). Contributes effectively.
Further, the prepreg composite tape 10 is advantageous in reducing the inner diameter of the wound body relative to the thickness of the prepreg tape, and reducing the outer diameter of the core used for producing the wound body, as compared with the composite tape 130 of the conventional configuration. By reducing the inner diameter of the wound body, it is possible to reduce the winding diameter with respect to the length of the prepreg tape. The prepreg composite tape 10 can reduce the limit value of the inner diameter of the wound body relative to the thickness of the prepreg tape, which can prevent the occurrence of curling, as compared with the composite tape 130 of the conventional configuration. The wound body produced using the prepreg composite tape 10 has a reduced inner diameter within a range that can prevent the occurrence of curling, thereby preventing the occurrence of curling and reducing the winding diameter with respect to the length of the prepreg tape. Can be realized.

  DESCRIPTION OF SYMBOLS 10 ... Prepreg composite tape, 11 ... Photocurable prepreg tape, 11a ... (Photocurable prepreg tape) surface, 12 ... Film, 12a ... (Film) surface, 12b ... (Film) sticking surface, 21, 22 ... prepreg tape wound body, 30 ... adherend (concrete structure).

Claims (3)

A prepreg tape wound body obtained by winding a prepreg composite tape,
The prepreg composite tape has a light-peelable peelable film attached to only one side of the photocurable prepreg tape,
The photocurable prepreg tape is constituted by impregnating a substrate made of glass fiber with a liquid photocurable resin composition,
The photocurable resin composition is composed of an epoxy acrylate resin, and is thickened by blending thermoplastic resin particles as a gelling agent.
The prepreg tape wound body , wherein the film is subjected to silicone treatment only on the surface side opposite to the sticking surface in contact with the photocurable prepreg tape. The prepreg tape wound body according to claim 1, wherein the film is attached to an outer peripheral side of the photocurable prepreg tape .   The prepreg tape wound body according to claim 2, wherein the film of the prepreg composite tape is any one of a polyethylene terephthalate film, a polyethylene film, a polypropylene film, a polyvinyl chloride film, and a nylon film.