KR20130004443A

KR20130004443A - Production method of fiberglass reinforced plastic inflatable-marine-buoys

Info

Publication number: KR20130004443A
Application number: KR1020120133577A
Authority: KR
Inventors: 윤재영
Original assignee: 윤재영
Priority date: 2012-11-23
Filing date: 2012-11-23
Publication date: 2013-01-10

Abstract

According to the present invention, buoyancy and buffering properties of a material including a fishery mark indicating various fish farms and fisheries on the sea, a sea mark such as a net mark indicating the position of the net, a fish marking and a route marking rich, and various life preservers are required. The present invention relates to various marine rich materials, which have excellent adhesion to foamed polystyrene foams formed by foaming polystyrene foams (EPS below) and excellent adhesive strength with pre-manufactured reinforced plastic molded articles while maintaining the foam foam shape. Formulation Polyurethane-based resin is coated with polystyrene foam, and then the outer side of the polystyrene foam is reinforced with FRP (reinforced plastic) to improve buoyancy and durability so that it can be used for a long time. It is about rich manufacturing method

Description

Production Method of Fiberglass Reinforced Plastic Inflatable-marine-buoys}

According to the present invention, buoyancy and buffering properties of materials including various fish farms and fisheries markings for fishing, marine markings such as net markings indicating the position of the net, fishing marks and airborne buoys, and various life preservers are required. Coating solvent-free polyurethane-based resins having excellent adhesion to rich polystyrene foams formed by foaming to prevent the loss of durability and buoyancy, which are problems of polystyrene foams, which are most frequently used. After adhering the sheet molding compound (SMC) molding method or hand-molded buoyant plastic (FRP), the outside of the polystyrene foam is reinforced with the reinforced plastic (FRP) by handlay molding method, Coating with a fixed color improves the buoyancy and durability of the rich polystyrene foam It relates to a method of producing a rich dual structure reinforcement of the reinforced plastics on the improved polystyrene foam for use in long-term resolution

A rich man (collectively, a buoy or a ball) used in the sea is an anchor mark, a cross buoy, a cylindrical buoy, a circular buoy, a lozenge as a marine term mark such as a fishing mark indicating various farms and fishing grounds, and a net mark indicating the position of the net. It is installed in the sea to help the safety and maritime activities of ships that carry out various marine activities such as buoys.

Conventional rich manufacturing techniques include filling into the shape of the rich to be produced by EPS foam, which is a type of synthetic resin foam, foaming and molding, and foamed foams in which raw materials of synthetic resins such as EVA, PVC, and PP are added with a blowing agent and a crosslinking agent. Forming or reinforcing the outside of the foam molded EPS foam with a reinforcement to manufacture a buoy is widely known.

For example, Korean Patent Laid-Open Publication No. 1020110053305 (20110520) and Publication No. 1020110059913 (20110608) disclose a buoy manufacturing method of expanding and molding synthetic resin foam beads.

Korean Patent Publication No. 1020010076084 (20010811) describes a method for producing a rich double structure in which an external part of the rich is manufactured by extrusion molding using a thermoplastic synthetic resin, and then the inside is filled with polyurethane and foamed.

Published Publication No. 1019980067833 (19981015) discloses aquaculture products and a method for manufacturing aquaculture products comprising a foamed urethane stock solution layer formed by symmetrically attaching a plurality of urethane resin molds and filling the attached urethane molds. Is public

Korean Patent Publication No. 10-1191376 (Application No. 10-2012-0052077) relates to a manufacturing method of an eco-friendly buoy prepared by heat-sealing two polypropylene molded films and a polypropylene foamed product foamed with polypropylene therein. Is open to the public

Publication No. 20-2002-0038463 discloses an aquaculture buoy protecting device using a protective device made of synthetic resin (plastic) of a rope wound on a styrofoam buoy, and a buoy in application no. 20-2010-0013584. The buoy cover which adds UV coating and sewing line to the buoy cover that can be used for a long period of time for salt is disclosed, and application number 20-2000-0001258 relates to a buckle used for cage farming. It is open about the mouth with a sieve

Domestic Publication No. 1020110053305 (20110520) Domestic Publication No. 1020110059913 (20110608) Domestic Publication No. 1020010076084 (20010811) Korean Laid-Open Patent Publication No. 1019980067833 (19981015) Domestic Patent Application Publication No. 10-2012-0052077 Korean Patent Application Publication No. 20-2002-0038463 Korean Patent Application Publication No. 20-2010-0013584 Korean Patent Application Publication No. 20-2000-0001258

In case of buoy manufactured using raw materials such as EVA, PVC, PE and PP, which are conventional synthetic materials, the complexity of manufacturing process and the process of injecting polystyrene foam after high temperature molding such as PVC, PE and PP and the increase of synthetic resin raw material cost The disadvantages of increased manufacturing cost due to the foam and EPS foam made of polystyrene foam are that the buoyancy decreases by 55% due to water absorption or breakage due to water pressure or wind wave after installation 1-2 years, oxidation and flame resistance, and It is an object of the present invention to prevent the loss of function as a float and the marine pollution caused by the durability as a waste due to the durability that is easily broken due to weak chemical properties and to improve the disadvantage of the float.

In order to solve the above problems, the present invention is a polystyrene foam polystyrene foam is most commonly used as a rich melted by a chemical solvent or a thermosetting resin solvent can not easily improve the foam foam external reinforcement and can be used for external reinforcement In order to compensate for the disadvantages of the thermosetting resin, the urethane-based adhesive resin was examined as an excellent reinforcement and a primary reinforcing material, and when the foam was coated with a solvent-free urethane, the foam was not melted. Examine the sheet molding compound (SMC) molding method and the handlay molding method, which is a reinforcing plastic molding method that can be produced, and pre-fabricated the foam parts by pre-fabricating the molded parts of the molded articles on the foam foam. Outer reinforcement laminated with excellent and high strength reinforced plastic (FRP) Coated with a color that is easy to provide a method of manufacturing a durable float to the problem solution means another object of the present invention.

The present invention has excellent adhesion to buoys formed of polystyrene foam and is a solvent-free urethane resin that is adhesively coated while maintaining the foam foam formation as it is. It is a buoy which reduces corrosion caused by waves, salts, chemicals, sunlight, etc. by enhancing the buoyancy and the strong durability by preventing the penetration of internal moisture by reinforcing adhesion to the existing polystyrene foam foam by strengthening weather resistance, chemical resistance, impact resistance, and strength. It is possible to reduce pollution caused by marine pollution, strengthen the buoy's durability, produce by mass forming molding method, provide economical and safe marine structure that can be used for a long time, and use it effectively for marine structure application using polystyrene foam.

1 is a perspective view of a part made of reinforced plastic produced by the sheet molding compound (SMC) molding method of the present invention
Figure 2 is a perspective view of the polystyrene foam of the present invention coated with a solvent-free urethane
Figure 3 is a perspective view of the production of the spherical adhesive by molding molded foam foam coating and sheet molding compound (SMC) molding method of the present invention
Figure 4 is a perspective view reinforced with a reinforced plastic outer foam foam produced in Figure 3 of the present invention
Fig. 5 A double structure rich of reinforced plastic of the present invention.

According to the present invention, buoyancy and buffering properties of a material including a fishery mark indicating various fish farms and fisheries on the sea, a sea mark such as a net mark indicating the position of the net, a fish marking and a route marking rich, and various life preservers are required. The present invention relates to various marine rich materials, which have excellent adhesion to the rich polystyrene foam 10 formed by foaming polystyrene foam (EPS), and are manufactured in advance while maintaining the foam foam shape. , 5) after the polyurethane resin (13) with excellent adhesion to the polystyrene foam (10) with a coating and then the outside of the polystyrene foam foam reinforced reinforced by FRP (hereinafter referred to as FRP, 11) buoyancy and durability This is an excellent and improved method for producing rich (12) of reinforced plastic double structure for long-term use.

The polystyrene foam used in the present invention is easily soluble in chemical solvents such as acetone, toluene, styrene, and acrylic monomers, and is easily soluble in unsaturated polyester resin or epoxy resin, which is a thermosetting resin for reinforced plastics. Thermosetting resin reinforcement is limited in reinforcement, and in the case of thermoplastic resin, since molding of thermoplastic resin is performed at a high temperature of about 200 ° C, it is difficult to directly form the foam, and there are many problems in processing of filling the foam foam after molding thermoplastic resin in advance. .

In the present invention, as a coating agent and a reinforcing agent, as a result of investigation to use a thermosetting resin, epoxy resin and unsaturated polyester resin have a solvent added to the resin to be used, the problem that polystyrene foam is easily melted by styrene as a solvent and curing agent in the case of epoxy resin It is difficult to use it for external reinforcement due to melting of polystyrene foam by the curing agent, and in case of urethane resin, polyol without solvent is added. In case of aqueous urethane, foam foam does not melt. In order to confirm the property of not dissolving, the solvent-free urethane resin was selected as a coating agent, and to confirm the coating state of the foam foam, the coating was applied by applying color to the coating agent to confirm the coating state.

As the reinforcing material used in the present invention, an unsaturated polyester resin and glass fiber used as a reinforcing plastic (FRP) were used as reinforcing materials. Reinforcing plastic (FRP) is a well-known method for forming structures in various forms according to moldings. can and as affordable, yet excellent performance price thermosetting resin corrosion-resistant tanks, building materials, has been widely used as structural materials and interior materials such as car, ship, polyurethane foam and polyurethane molding and the interfacial adhesion is excellent reinforced plastic (FRP) moldings It is also used a lot with urethane resin in manufacturing.

The present invention improves productivity by preforming the curved parts (5) forming the sheet molding compound (SMC) molding method (FIG. 1) and the handlay molding method (FIG. 4) in advance, and forming both the corner portions 4 of the buoy and the string. It is possible to mass-produce and use sheet molding compound (SMC) sheet with low price in consideration of price competitiveness. In order to improve productivity and control molding thickness by high temperature press molding, it is mass-molded and molding thickness to minimize specific gravity and weight of reinforced plastic. Was molded from 1.2 to 1.5 mm.

Reinforced plastic (FRP) manufactured in the present invention is molded using a sheet molding compound (SMC) sheet prepared by selecting a color (orange, white) before product molding in order to facilitate the appearance and identification of buoys and handlay Reinforced plastic (FRP) by work can vary in thickness depending on the type of glass fiber and the number of laminations. However, 300g / ㎡ and 450g / ㎡ glass fiber mats, which are commonly used, are used for ships, which are resins for reinforced plastics. Work was carried out by a handlay molding method with an ohso-type unsaturated polyester resin.

In the present invention, the first step of forming and molding both edge portions 4 and the string-binding portion 5 by the sheet molding compound (SMC) molding method and after coating the polystyrene foam foam 10 with a solvent-free urethane-based resin (13) Bonding the edges and the string tie at the same time, hardening the coating and the bonded edges, and then reinforcing the outside of the polystyrene foam with reinforced plastic (11) using unsaturated polyester resin, and for easy identification It consisted of finishing with a gel coat.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

[Formation of corners and strings]

The sheet molding compound (SMC) molding method (FIG. 1) forms the edge portion 4 and the string tie portion 5 to a thickness of 1.2 mm to 1.5 mm.

The sheet used for molding is a sheet molding compound (SMC) sheet made of 49 parts by weight of a commonly used resin, 10 parts by weight of calcium carbonate, 10 parts by weight of light filler (specific gravity 0.5-0.9), and 20 parts by weight of glass fiber (3) Molding temperature Upper mold (1) 145 ℃ Lower mold (2) Reinforced plastic molding is produced by SMC molding of corner part 4 and string bundling part 5 at 135 ℃ for 3 minutes curing time. do.

[Polystyrene Foam Foam Coating and Adhesion]

The surface of the foam foam 10 is coated with a brush or a spray by mixing 2.5 parts by weight of a curing agent and 0.1 parts by weight of a colorant with 10 parts by weight of a polyether polyol main body and a curing agent with a polystyrene foam foam 10 using a solvent-free urethane resin 13. .

The reason for the addition of the colorant is that the colorant (black) of the desired color (black) is added to the foam to confirm the urethane coating state.

After the coating is completed, the solvent-free urethane is applied to the corner portion 4 and the string-binding portion 5 previously formed by hardening.

[Reinforced Plastic (FRP) Reinforcement]

Unsaturated polyester resins commonly used for ships on empty parts other than the finished foam foam coating (13) and bonded edges (4) and string tie (5) parts. Using an ester resin, the glass fiber mat 300g / ㎡ or 450g / ㎡ one sheet by reinforcing and bonding the empty corner portion and the string tie portion to produce a reinforced plastic (11).

When the reinforcing bonding work is completed and cured, the double-structured rich member 12 made of reinforced plastic (FRP) is manufactured by coating and curing the reinforcing part with a gel coat of the same color as the sheet molding compound (SMC) molding method. It was.

If the hardening speed of the part reinforced by handlay work is slow, hardening is carried out for 30 minutes and 60 minutes in an oven at 50 to 70 ℃ to improve the curing speed.

1 Upper mold 2. Lower mold
3. Sheet molding compound (SMC) sheet 4. Edge reinforced plastic (SMC) molding
5. String Reinforced Plastic (SMC) Molded Parts
10. Polystyrene Foam 11.Reinforced Plastics (FRP)
12. Double structure rich with reinforced plastic 13. Solvent-free urethane foam foam coating

Claims

Reinforced plastic dual structure (12), characterized in that the reinforcement of reinforced plastics (FRP) with excellent adhesion and waterproof effect and durability to the rich formed in the polystyrene foam foam (10) in the aquaculture rich and marine rich Wealthy

The method of claim 1,
The corner part 4 and the string-binding part 5 are sheet molding compounds (SMC) forming method, and the sheet composition is made of 49 parts by weight of resin, 10 parts by weight of calcium carbonate, 10 parts by weight of light filler, and 20 parts by weight of glass fiber. Reinforced plastic moldings molded using a compound (SMC) sheet (3) at a molding temperature of the upper mold (1) 145 ° C lower mold (2) at 135 ° C for 3 minutes

The method of claim 1, wherein
Solvent-free urethane-based resin (13) that has excellent adhesion to the polystyrene foam 10 and does not dissolve the foam 10. Polyol is a polyether and an isocyanate curing agent. A rich, reinforced plastic double structure (12) characterized by coating (13) the foam foam (10) surface with a mixing brush or spray in proportions.

According to claim 1
A rich member of the reinforced plastic dual structure (12), characterized in that for bonding the reinforced plastics (4,5) made in claim 2 to the coating portion (13) made in claim 3 with a solvent-free urethane.

According to claim 1
In order to reinforce the outside of the foamed foam produced in claim 4 with reinforced plastics (11) by hand-laying with ortho-type unsaturated polyester resin 300g / ㎡ one piece of fiberglass mat or 450g / ㎡ one piece to tie the edge and the string Rich of reinforced plastic dual structure (12), characterized in that reinforcing parts

According to claim 1
Rich of reinforced plastic dual structure (12), characterized in that the outer surface of the reinforced plastic (12) is coated with a colored gel coat to facilitate external identification.