KR20130078591A - Thermoplastic composite material and preparing thereof - Google Patents

Abstract

PURPOSE: A thermoplastic composite manufacturing method is provided to enable a mass production without a necessity of a thermosetting process. CONSTITUTION: A thermoplastic composite manufacturing method includes a step which prepares 'a flat fabric which is comprised of a thermoplastic polymer resin and a high intensity fiber'; a step which extrudes the thermoplastic polymer resin with an extruder on both sides of the fabric while supplying the fabric; and a step which combines a thermoplastic polymer resin with both sides of the fabric. The fiber of high intensity is a glass fiber or a carbon fiber. 'A fabric which is formed in the fiber of high intensity' is laminated in one or more layers.

Description

Method for preparing thermoplastic composite and plastic composite prepared therefrom

The present invention relates to a method for manufacturing a thermoplastic composite and a plastic produced therefrom, and to a plastic composite which can be usefully used as a component of an automobile or an aircraft with a strong plastic by replacing a metal, and a method It is about plastic.

Recently, research and development for replacing metal materials using plastic composite materials has been steadily progressing.

Metal materials are excellent materials in terms of heat resistance and mechanical strength, and are currently used in many fields such as automobiles, aircrafts, and construction. However, metal materials have a disadvantage of being heavy because of their high specific gravity. On the other hand, since plastics have a low specific gravity, there is an advantage that a product of the same size can be manufactured several times lighter than metal, and efforts are being made to use it as a substitute for metal materials. In particular, due to high oil prices, the automobile and aerospace industries are making great efforts to make such products.

Plastics known to date are very difficult to achieve performance comparable to metals. Thus, attempts have been made to replace metals by combining plastics with other materials to realize the form of composite materials. The most commonly used composite materials include thermoset plastic composites. The thermosetting plastic composite material is prepared by dispersing carbon fiber or glass fiber in a thermosetting resin such as epoxy resin and then partially curing it to prepare a prepreg, and then processing the prepreg into a desired shape and then completing the thermosetting into a product. do. The advantage of such a thermosetting plastic composite is that once it is cured, its heat resistance and mechanical properties are very good. On the other hand, there is a limitation in the shape of the product because it is manufactured using a sheet-shaped prepreg, there is a disadvantage in that productivity is reduced and recycling is not performed because the heat curing process.

Other forms of plastic composites include thermoplastic composites. Since the thermoplastic composite is used by mixing short glass fibers or carbon fibers in a thermoplastic resin that can be injected or extruded, various types of products can be processed and recycled. On the other hand, when the fiber content is high, the melt viscosity increases rapidly and the workability is poor, and there is a problem in that the fiber content in the composite cannot be increased, and the fiber cannot be used in products requiring high strength because the fibers are disordered. have.

Accordingly, the development of a plastic composite having excellent mechanical properties such as strength, even if the plastic is manufactured so that the fiber occupies a large proportion.

In order to solve the above problems, the present invention overcomes the disadvantages of the conventional thermosetting and thermoplastic composites, and provides a method of manufacturing a thermoplastic composite that can replace metal materials with easy mechanical molding and excellent mechanical strength. have.

In order to achieve the above object, the present invention comprises the steps of preparing a planar fabric made of thermoplastic polymer resin and high-strength fibers; Simultaneously supplying the fabric and extruding the thermoplastic polymer resin on both sides of the fabric with an extruder; And it provides a thermoplastic plastic composite manufacturing method comprising the step of impregnating the thermoplastic polymer resin on both sides of the fabric.

In addition, the present invention is the thermoplastic polymer resin polycarbonate (PC), polyethylene terephthalate (PET), amorphous polyethylene terephthalate (APET), polypropylene terephthalate (PPT), polynaphthalene terephthalate (PEN), polyethylene terephthalate Glycerol (PETG), Polycyclohexylenedimethylene terephthalate (PCTG), modified triacetylcellulose (TAC), cycloolefin polymer (COP), cycloolefin copolymer (COC), dicyclopentadiene polymer (DCPD), cyclo Pentadiene polymer (CPD), polymethyl methacrylate (PMMA), polyimide (PI), polyarylate (PAR), polyether sulfone (PES), polyetherimide (PEI), silicone resin, fluororesin, poly It provides a thermoplastic plastic composite manufacturing method characterized in that at least one selected from the group consisting of amide and modified epoxy resin.

In another aspect, the present invention provides a method for producing a thermoplastic composite, characterized in that the high strength fibers are glass fibers or carbon fibers.

In another aspect, the present invention provides a thermoplastic composite composite manufacturing method characterized in that the fabric formed of the high strength fibers are laminated in one or more layers.

In another aspect, the present invention provides a thermoplastic plastic composite prepared by the above production method.

The manufacturing method of the thermoplastic composite according to the present invention can be mass-produced without the need of a thermosetting process, and can provide a thermoplastic composite having excellent mechanical properties.

Plastic composite obtained according to the present invention is excellent in mechanical properties and can be reduced by 50% or more compared to steel, it can be applied to the production of high-performance components such as automobiles and aircraft.

1 is a manufacturing process of the thermoplastic composite according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation to or in the numerical value of the manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

The present invention relates to a method of manufacturing a thermoplastic composite, and unlike the conventional plastic composite, high strength fibers, not short fibers, are manufactured in the form of a fabric for high mechanical strength, and the polymer resin is impregnated on both sides. Fabrics formed of high strength fibers can implement high mechanical properties because the fibers are arranged in a constant direction. Therefore, there is an advantage that can optimize the physical properties according to the shape of the plastic part to be manufactured.

The thermoplastic polymer resin used in the present invention is manufactured by affixing to both sides of a planar fabric made of high strength fibers, and the surface of the fabric is extruded into a thin film after being melted so as to easily penetrate between the fabrics during the joining. Closely in contact with. This is because the melt viscosity of the polymer is large to facilitate penetration between the high strength fibers.

It is preferable to use other thermoplastic polymer resins having a low melt viscosity as the thermoplastic polymer resin, and examples thereof include polycarbonate (PC), polyethylene terephthalate (PET), amorphous polyethylene terephthalate (APET), and polypropylene terephthalate. (PPT), polynaphthalene terephthalate (PEN), polyethylene terephthalate glycerol (PETG), polycyclohexylenedimethylene terephthalate (PCTG), modified triacetylcellulose (TAC), cycloolefin polymer (COP), cycloolefin co Polymer (COC), Dicyclopentadiene Polymer (DCPD), Cyclopentadiene Polymer (CPD), Polymethylmethacrylate (PMMA), Polyimide (PI), Polyarylate (PAR), Polyethersulfone (PES) , Polyetherimide (PEI), silicone resin, fluorine resin, polyamide and modified epoxy resin is preferably selected from one or more.

In addition, a pigment or the like may be added to the thermoplastic polymer resin to adjust the color.

In addition, the fabric may be made of the high strength fibers, preferably glass fibers or carbon fibers. The glass fiber or carbon fiber is excellent in high strength and mechanical properties.

The high strength fiber is formed in a woven fabric, the woven fabric is not particularly limited. That is, high strength fibers may be provided in a woven or knitted fabric or the like.

The fabric formed of the high strength fibers may be laminated in one or more layers. That is, it can be used suitably according to the use of the plastic component to be used.

Next, while supplying the fabric, the thermoplastic polymer resin is extruded by an extruder and then fed to both sides of the fabric.

Referring to Figure 1, the fabric of high strength fibers is fed through a roll of fabric wound fabric and the thermoplastic polymer resin is melted and extruded through two extruders, a T-die.

The extruded thermoplastic polymer resin is supplied to both sides of the fabric and is hot pressed by calender roll 130 to be combined. A plastic composite is prepared by laminating the fabric roll and three layers provided through two T-die 120s.

When pressed by calender roll 130, the temperature may be performed at 150 to 250 ° C., and the thermoplastic polymer resin is combined with the fabric. That is, the thermoplastic polymer resin has a low melt viscosity, and when the thermoplastic polymer resin is pressed at high temperature by calender rolls, the thermoplastic polymer resin easily penetrates between the fibers constituting the fabric.

Plastic composite prepared by the present invention is capable of producing a high performance plastic composite having a high fiber content of 40 ~ 60 vol.% Fiber content.

The plastic impregnated through the calender roll 130 may be manufactured into a desired shape by heat molding. The impregnated plastics can be made into parts of the desired shape by a thermoforming process. That is, after heating through a heater it can be inserted into a mold having a desired shape and then pressurized to produce the desired parts. This thermoforming process enables mass production of thermoplastic composites.

Hereinafter, embodiments of the present invention will be described.

Example

A fabric made of glass fiber is wound around a fabric roll and prepared, and polycarbonate (PC) resin is put into two T-dies and melted at 280 ° C. Next, supply the fabric in the fabric roll, but having two layers, extrude the PC resin on both sides of the fabric through the T-die and combine by using a calender roll. At this time, the temperature of the calender roll is about 200 ℃. After passing through a calender roll and cooling at room temperature, the plastic composite was completed.

Comparative example

On the other hand, the plastic composite prepared in Example and steel and aluminum and specific strength, and the density was compared, the comparison is summarized in Table 1 below.

division Nasal cavity
(σ / ρ) The tensile strength
(MPa) density
(g / cm3) Example 239 430 1.8 steal 42 348 8.4 aluminum 115 312 2.7

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

Claims (5)

Preparing a planar fabric made of thermoplastic polymer resin and high strength fibers;
Simultaneously supplying the fabric and extruding the thermoplastic polymer resin on both sides of the fabric with an extruder; And
A method of manufacturing a thermoplastic composite comprising the step of impregnating the thermoplastic polymer resin on both sides of the fabric.
The method of claim 1,
The thermoplastic polymer resin is polycarbonate (PC), polyethylene terephthalate (PET), amorphous polyethylene terephthalate (APET), polypropylene terephthalate (PPT), polynaphthalene terephthalate (PEN), polyethylene terephthalate glycerol (PETG) , Polycyclohexylenedimethylene terephthalate (PCTG), modified triacetylcellulose (TAC), cycloolefin polymer (COP), cycloolefin copolymer (COC), dicyclopentadiene polymer (DCPD), cyclopentadiene polymer ( CPD), polymethylmethacrylate (PMMA), polyimide (PI), polyarylate (PAR), polyethersulfone (PES), polyetherimide (PEI), silicone resins, fluororesins, polyamides and modified epoxy Method for producing a thermoplastic composite, characterized in that at least one selected from the group consisting of a resin.
The method of claim 1,
The high strength fiber is a thermoplastic fiber composite manufacturing method, characterized in that the glass fiber or carbon fiber.
The method of claim 1,
Fabric formed of the high-strength fibers is a thermoplastic plastic composite manufacturing method characterized in that laminated in more than one layer.
A thermoplastic plastic composite prepared by the method according to any one of claims 1 to 4.

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