CN104723631A - Carbon fiber composite material product and production method - Google Patents

Abstract

The invention belongs to the technical field of polymer materials, and relates to a carbon fiber composite material product and a manufacturing method. The carbon fiber composite material product sequentially includes an upper layer of carbon fiber cloth, a thermoplastic resin micro-foamed plate layer and a lower layer of carbon fiber cloth from top to bottom, wherein the carbon fiber cloth The upper and lower layers respectively contain 1-2 layers of carbon fiber prepreg. The invention adopts the carbon fiber cloth as the surface layer, which improves the mechanical properties of the composite material; the preparation process is simple, the relative cost is low, and the industrial production is easy; it can be used in the field of high-end electronic appliances.

Description

A kind of carbon fiber composite material product and manufacturing method

technical field

The invention belongs to the technical field of polymer materials, and relates to a carbon fiber composite material product and a manufacturing method.

Background technique

Carbon fiber is characterized by light weight, high strength, high modulus, high temperature resistance, corrosion resistance and fatigue resistance. Its excellent mechanical properties make it widely used as a reinforcement material for plastics. Carbon fiber composite materials such as FRP products are widely used in aerospace, transportation, sports equipment, construction engineering, fire protection and other fields.

Chinese patent CN101532253 introduces a carbon fiber composite product and its manufacturing method. The carbon fiber composite product includes multi-layer carbon fiber cloth laminated together. The direction of the lines is also staggered. The surface of the carbon fiber composite product preform prepared by this method is not prone to small pits, so there is no need for soil filling and grinding processes, which reduces the number of procedures and costs. However, this method uses multiple layers of carbon fiber cloth. The thickness of a single layer of carbon fiber cloth is very thin. To achieve the thickness of a notebook or mobile phone case, N layers of such carbon fiber cloth are required (N > 6). The cost of carbon fiber cloth is relatively high. , which makes the finished product cost of the composite material higher.

Chinese patent CN1241085C introduces the reinforcement method of carbon fiber for the aluminum-magnesium alloy casing of notebook computers. The defective computer casings that were originally made of aluminum-magnesium alloys by high-temperature die-casting are subjected to the following processes: first, the surface of the defective computer casings is chemically Pre-treatment; second, carbon fiber (or glass fiber) is impregnated with resin to form carbon fiber (or glass fiber) material; third, the surface of the carbon fiber (or glass fiber) material is glued to the defective computer case ; The 4th, carry out the hardening treatment of heating, pressurization with this defective computer casing that is pasted with carbon fiber (or glass fiber) material, form the computer casing that aluminum-magnesium alloy reinforces has carbon fiber structure, improve the intensity of computer casing. There are several disadvantages in this method: First, there are many processes. For the bonding of carbon fiber and aluminum-magnesium alloy, an additional layer of glue needs to be added in the middle for lamination, which undoubtedly increases equipment investment and costs. Second, magnesium is a kind of polymer material, which will flow and produce pinholes during the high-temperature die-casting process. The strength of the place with few pinholes is higher, and the strength of the place with dense pinholes is relatively weak, resulting in uneven strength of the material. Defects. Third, the weight of the reinforced aluminum-magnesium alloy shell is relatively heavy.

Contents of the invention

The object of the present invention is to provide a high-strength and light-weight carbon fiber composite material product and a manufacturing method in order to overcome the defects of the prior art.

To achieve the above object, the technical scheme adopted in the present invention is as follows:

A carbon fiber composite material product, the carbon fiber composite material product comprises an upper layer of carbon fiber cloth, a thermoplastic resin micro-foamed board layer and a lower layer of carbon fiber cloth from top to bottom, wherein the upper layer and the lower layer of carbon fiber cloth respectively contain 1-2 layers of carbon fiber prepreg cloth .

The thermoplastic resin micro-foamed board is polypropylene micro-foamed board, polyethylene micro-foamed board or polyvinyl chloride micro-foamed board.

The thermoplastic resin micro-foaming material has a density of 0.1g/cm ³ -0.8g/cm ³ , preferably 0.5g/cm ³ -0.8g/cm ³ , and a thickness of 0.5-1.0mm.

The carbon fiber prepreg is a prepreg obtained by impregnating carbon fiber with epoxy resin.

The carbon fiber prepreg can be carbon fiber unidirectional prepreg, carbon fiber woven plain prepreg or carbon fiber twill twill prepreg; wherein the woven twill prepreg can be 1K or 3K twill prepreg.

The thickness of the carbon fiber unidirectional prepreg is 0.1-0.25 mm, and the thickness of the carbon fiber woven plain weave or carbon fiber twill weave prepreg is 0.2-0.35 mm.

A method for preparing the above-mentioned carbon fiber composite product, the method comprising the steps of:

(1) Cut the thermoplastic resin micro-foamed board and carbon fiber prepreg into the required size for later use;

(2) Clean the mold and apply a release agent for easy demoulding;

(3) Laminating the thermoplastic resin micro-foamed board and carbon fiber prepreg in step (1);

(4) Put the superimposed materials in step (3) into the mold, first put the mold at a certain temperature and keep it for a period of time, pressurize and raise the temperature, and keep the temperature for a period of time;

(5) Take out the mold in the above step (4) and put it into the cooling equipment, cool it under a certain pressure for a period of time, take out the composite material product from the mold, and cut it into the required size.

In the step (2), the release agent is German Mikon FK-03/02 or German Mikon F-57.

In the step (3), the lamination sequence of the thermoplastic resin micro-foamed board and the carbon fiber prepreg is as follows: take the thermoplastic resin micro-foamed board as the middle layer, and laminate 1-2 layers of carbon fiber on the upper and lower surfaces in turn. Prepreg cloth, wherein the carbon fiber prepreg cloth on the upper and lower surfaces of the thermoplastic resin microfoamed board is laid symmetrically, that is, the carbon fiber prepreg cloth on the upper and lower surfaces of the thermoplastic resin microfoamed board is placed in the same way;

In the step (4), the mold is first placed at 80-90°C for 40-60 minutes, pressurized to 30-60bar, and the temperature is raised to 100-120°C, and the heat preservation and pressure holding time is 10-30 minutes;

In the step (5), the cooling pressure is 30-60 bar, and the cooling time is 10-30 min.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The present invention uses carbon fiber cloth as the surface layer, which improves the mechanical properties of the composite material;

(2) The carbon fiber has a small weight and low density, and the interlayer is a micro-foaming material with a density of less than 0.8g/cm ³ , which makes the overall density of the composite material small and achieves the effect of weight reduction;

(3) The middle layer adopts micro-foamed thermoplastic resin, which increases the rigidity of the composite material and reduces the cost;

(4) The thermal melting temperature of the middle layer should not be too high. It is best to be a little higher than the curing temperature of the carbon fiber prepreg, so that the thermoplastic microfoamed board and the carbon fiber prepreg can be directly bonded together through the curing of the prepreg tape. No additional gluing process is required, which simplifies the process;

(5) The equipment required in the present invention is simple to operate, relatively low in cost, and easy to industrialized production;

(6) The present invention can be used in the field of high-end electronic appliances.

Detailed ways

The present invention will be further described below in conjunction with embodiment.

The manufacturer of the carbon fiber prepreg used in the following examples is Xiamen Fusheng Composite Material Co., Ltd.

Example 1

(1) Cut the PVC micro-foamed board and carbon fiber woven plain weave prepreg to the required size and set aside;

(2) Clean the mold and apply the release agent Germany Mikon F-57 for easy demoulding;

(3) Lay the PVC micro-foamed board and carbon fiber woven plain weave prepreg in step (1) together in a certain order. A 0.5mm thick PVC microfoamed board is used as the middlemost layer, and the density of the PVC microfoamed board is 0.5g/cm ³ . Lay a layer of carbon fiber plain weave prepreg on the upper and lower surfaces in turn, in which the carbon fiber plain weave prepreg on the upper and lower surfaces of the PVC microfoamed board is laid symmetrically, that is, the carbon fiber plain weave prepreg on the upper and lower surfaces of the PVC microfoamed board The laying method of the cloth is the same; the thickness of the carbon fiber plain weave prepreg cloth is 0.35mm;

(4) Put the 3-layer composite material bonded in step (3) into the mold, first place the mold at 80°C for 60 minutes, pressurize to 30bar, and raise the temperature to 100°C, keep the temperature and hold the pressure 30min;

(5) Take out the mold in the above step (4) and put it into the cooling equipment to cool it down, cool it under the pressure of 30bar for 20min, take out the composite material product from the mold, the thickness of the product is 1.2mm, and it can be cut into the required size .

Example 2

(1) Cut the PP micro-foamed board and the carbon fiber unidirectional prepreg into the required size for later use;

(2) Clean the mold and apply the release agent Germany Mikon FK-03/02 for easy demoulding;

(3) Lay the PP microfoamed board and carbon fiber prepreg in step (1) together in a certain order. The 0.7mm thick PP microfoam board is used as the middlemost layer, and the density of the PP microfoam board is 0.8g/cm ³ . Lay 2 layers of carbon fiber unidirectional prepreg on the upper and lower surfaces in turn, and the laying method of the 2 layers of carbon fiber unidirectional prepreg on the upper surface is 0°/90° from top to bottom, and the PP micro The carbon fiber unidirectional prepreg on the upper and lower surfaces of the foam board is laid symmetrically, that is, the carbon fiber unidirectional prepreg on the upper and lower surfaces of the PP microfoam board is placed in the same way; the thickness of the carbon fiber unidirectional prepreg is 0.15mm;

(4) Put the 5-layer composite material bonded in step (3) into the mold, first place the mold at 85°C for 50 minutes, pressurize to 45bar, and raise the temperature to 100°C, keep the temperature and hold the pressure 30min;

(5) Take out the mold in the above step (4) and put it in the cooling equipment to cool, and cool it under the pressure of 45bar for 25min, demold and take out the composite material product, the thickness of the product is 1.3mm, and it can be cut to the required size.

Example 3

(1) Cut the PVC micro-foamed board and carbon fiber 3k twill weave prepreg to the required size and set aside;

(2) Clean the mold and apply the release agent Germany Mikon F-57 for easy demoulding;

(3) Lay the PVC micro-foamed board and carbon fiber 3k twill weave prepreg in step (1) together in a certain order. A 0.6mm thick PVC microfoamed board is used as the middlemost layer, and the density of the PVC microfoamed board is 0.6g/cm ³ . Lay a layer of carbon fiber 3k twill weave prepreg on the upper and lower surfaces in turn, in which the carbon fiber 3k twill weave prepreg on the upper and lower surfaces of the PVC microfoamed board is laid symmetrically, that is, the carbon fiber 3k twill weave on the upper and lower surfaces of the PVC microfoamed board The laying method of the woven prepreg layer is the same; the thickness of the carbon fiber 3k twill weave prepreg is 0.2mm;

(4) Put the 3-layer composite material bonded in step (3) into the mold, first place the mold at 80°C for 50 minutes, pressurize to 40bar, and raise the temperature to 100°C, keep the temperature and hold the pressure 20min;

(5) Take out the mold in the above step (4) and put it in the cooling equipment to cool, and cool it under the pressure of 40bar for 15min, demold and take out the composite material product, the thickness of the product is 1.0mm, and it can be cut to the required size.

Example 4

(1) Cut the PP micro-foamed board and the carbon fiber unidirectional prepreg into the required size for later use;

(2) Clean the mold and apply a release agent. The release agent is Mikon FK-03/02 from Germany for easy demoulding;

(3) Lay the PP microfoamed board and carbon fiber unidirectional prepreg in step (1) together in a certain order. The thickness is 1.0mm thick PP microfoam board as the middle layer, and the density of PP microfoam board is 0.7g/cm ³ . Lay 2 layers of carbon fiber unidirectional prepreg on the upper and lower surfaces in turn, and the laying method of the 2 layers of carbon fiber unidirectional prepreg on the upper surface is 0°/90° from top to bottom. The carbon fiber unidirectional prepreg on the upper and lower surfaces of the foam board is laid symmetrically, that is, the carbon fiber unidirectional prepreg on the upper and lower surfaces of the PP microfoam board is laid in the same way; the thickness of the carbon fiber unidirectional prepreg is 0.25mm;

(4) Put the 5-layer composite material bonded in step (3) into the mold, first place the mold at 90°C for 60 minutes, pressurize to 60bar, and raise the temperature to 120°C, keep the temperature and hold the pressure 30min;

(5) Take out the mold in the above step (4) and put it in the cooling equipment to cool it, cool it under the pressure of 60bar for 30min, take out the composite material product from the mold, the thickness of the product is 2.0mm, and it can be cut to the required size.

Example 5

(1) Cut the PP micro-foamed board and the carbon fiber unidirectional prepreg into the required size for later use;

(2) Clean the mold and apply the release agent Germany Mikon FK-03/02 for easy demoulding;

(3) Lay the PP microfoamed board and carbon fiber unidirectional prepreg in step (1) together in a certain order. The 0.5mm thick PP microfoam board is used as the middlemost layer, and the density of the PP microfoam board is 0.5g/cm ³ . Lay 2 layers of carbon fiber unidirectional prepreg on the upper and lower surfaces in turn, and the laying method of the 2 layers of carbon fiber unidirectional prepreg on the upper surface is 0°/90° from top to bottom. The carbon fiber unidirectional prepreg on the upper and lower surfaces of the foam board is laid symmetrically, that is, the carbon fiber unidirectional prepreg on the upper and lower surfaces of the PP microfoam board is laid in the same way; the thickness of the carbon fiber unidirectional prepreg is 0.1mm;

(4) Put the 5-layer composite material bonded in step (3) into the mold, first place the mold at 80°C for 40 minutes, pressurize to 55bar, and raise the temperature to 100°C, keep the temperature and hold the pressure 10min;

(5) Take out the mold in the above step (4) and put it in the cooling equipment to cool, and cool it under the pressure of 55bar for 10min, demold and take out the composite material product, the thickness of the product is 0.9mm, and it can be cut to the required size.

Example 6

(1) Cut the PVC micro-foamed board and carbon fiber plain weave prepreg to the required size, and set aside;

(2) Clean the mold and apply a release agent, the release agent is Mikon F-57 from Germany, which is convenient for demoulding;

(3) Lay the PVC micro-foamed board and carbon fiber plain weave prepreg in step (1) together in a certain order. The 1.0mm PVC microfoamed board is used as the middlemost layer, and the density of the PVC microfoamed board is 0.8g/cm ³ . Lay a layer of carbon fiber plain weave prepreg on the upper and lower surfaces in turn, in which the carbon fiber plain weave prepreg on the upper and lower surfaces of the PVC microfoamed board is laid symmetrically, that is, the carbon fiber plain weave prepreg on the upper and lower surfaces of the PVC microfoamed board The laying method of the cloth layer is the same; the thickness of the carbon fiber plain weave prepreg cloth is 0.35mm;

(4) Put the 3-layer composite material bonded in step (3) into the mold, then place the mold at 90°C for 50 minutes, pressurize to 50bar, and raise the temperature to 120°C, keep the temperature and hold the pressure 20min;

(5) Take out the mold in the above step (4) and put it in the cooling equipment to cool it, and cool it under the pressure of 50bar for 25min, demold and take out the composite material product, the thickness of the product is 1.7mm, and it can be cut to the required size.

Example 7

(1) Cut the PVC micro-foamed board and carbon fiber 1k twill weave prepreg to the required size and set aside;

(2) Clean the mold and apply a release agent, the release agent is Mikon F-57 from Germany, which is convenient for demoulding;

(3) Lay the PVC micro-foamed board and carbon fiber woven 1k twill weave prepreg in step (1) together in a certain order. A 0.8mm thick PVC microfoamed board is used as the middlemost layer, and the density of the PVC microfoamed board is 0.6g/cm ³ . Lay a layer of carbon fiber 1k twill weave prepreg on the upper and lower surfaces in turn, in which the carbon fiber 1k twill weave prepreg on the upper and lower surfaces of the PVC microfoamed board is laid symmetrically, that is, the carbon fiber 1k twill weave on the upper and lower surfaces of the PVC microfoamed board The laying method of the woven prepreg layer is the same; the thickness of the carbon fiber 1k twill weave prepreg is 0.3mm;

(4) Put the 3-layer composite material bonded in step (3) into the mold, first place the mold at 90°C for 40 minutes, pressurize to 60bar, and raise the temperature to 100°C, keep the temperature and hold the pressure 10min;

(5) Take out the mold in the above step (4) and put it in the cooling equipment to cool it, cool it under the pressure of 60bar for 15min, take out the composite material product from the mold, the thickness of the product is 1.0mm, and it can be cut to the required size.

The resulting properties are shown in Table 1 below.

Table 1

It can be seen from the above Table 1 that the carbon fiber composite material product prepared by the present invention has excellent mechanical properties, high strength and good impact resistance, and can be used in the field of high-end electronic appliances.

The above description of the embodiments is for those of ordinary skill in the art to understand and apply the present invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative effort. Therefore, the present invention is not limited to the embodiments herein. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. a carbon fiber composite material article, it is characterized in that: this carbon fiber composite material article comprises carbon cloth upper strata, thermoplastic resin fretting map flaggy and carbon cloth lower floor from top to bottom successively, wherein the upper and lower layer of carbon cloth is respectively containing 1-2 layer carbon fibre initial rinse fabric.

2. carbon fiber composite material article according to claim 1, is characterized in that: described thermoplastic resin fretting map plate is polypropylene fretting map plate, polyethylene fretting map plate or polyvinyl chloride fretting map plate.

3. carbon fiber composite material article according to claim 1 and 2, is characterized in that: the density of described thermoplastic resin micro-foaming material is 0.1g/cm ³-0.8g/cm ³, preferred 0.5g/cm ³-0.8g/cm ³; Thickness is 0.5-1.0mm.

4. carbon fiber composite material article according to claim 1, is characterized in that: described carbon fibre initial rinse fabric is the prepreg cloth that impregnated carbon fiber epoxy resin obtains.

5. the carbon fiber composite material article according to claim 1 or 4, is characterized in that: described carbon fibre initial rinse fabric is carbon fiber one-way prepreg cloth, carbon fiber knit plain weave prepreg cloth or carbon fiber knit twill prepreg cloth; Wherein said knitting twill prepreg cloth is the twill prepreg cloth of 1K or 3K.

6. carbon fiber composite material article according to claim 5, is characterized in that: the thickness of described carbon fiber one-way prepreg cloth is 0.1-0.25mm, and described carbon fiber knit plain weave or carbon fiber knit twill prepreg cloth thickness are 0.2-0.35mm.

7. the preparation method of arbitrary described carbon fiber composite material article in claim 1-6, is characterized in that: the method comprises the steps:

(1) thermoplastic resin fretting map plate and carbon fibre initial rinse fabric are cut into the size of needs, for subsequent use;

(2) mold cleaning is clean, coat releasing agent;

(3) by the thermoplastic resin fretting map plate of step (1) and carbon fibre initial rinse fabric superimposed;

(4) superimposed material in step (3) is put into mould, after keeping a period of time under first mould being placed in uniform temperature, pressurization is raised temperature also, heat-insulation pressure keeping a period of time;

(5) cooling device is put in the mould taking-up in above-mentioned steps (4), cool a period of time under a certain pressure, composite product is taken out in the demoulding, is cut into the size of needs.

8. preparation method according to claim 7, is characterized in that: in described step (2), and described releasing agent is German Mikon FK-03/02 or German Mikon F-57.

9. preparation method according to claim 7, it is characterized in that: the superimposed order of thermoplastic resin fretting map plate and carbon fibre initial rinse fabric is in described step (3): with thermoplastic resin fretting map plate for most intermediate layer, lower surface is respectively fitted 1-2 layer carbon fibre initial rinse fabric thereon successively, wherein the symmetrical lay of the carbon fibre initial rinse fabric of thermoplastic resin fretting map plate upper and lower surface.

10. preparation method according to claim 7, it is characterized in that: in described step (4), keep 40 ~ 60min at first mould being placed in 80 ~ 90 DEG C, be forced into 30-60bar, and temperature is risen to 100 ~ 120 DEG C, the heat-insulation pressure keeping time is 10 ~ 30min;

Or in described step (5), cooling pressure is 30-60bar, cool time is 10-30min.