CN107215066A - A kind of composite plate and preparation method thereof - Google Patents

Abstract

A composite board and a preparation method thereof relate to the field of composite materials. The preparation method of the composite board improves the mechanical properties of the composite board by using multi-layer wide-angle cloth as the reinforcement layer of the composite board; by dislocation and rotating the multi-layer wide-angle cloth, the structural stability and mechanical properties of the composite board are further strengthened. The performance, especially the anti-deformation ability of the composite board has been greatly improved; by using the improved resin transfer molding method to cure and connect the multi-layer wide-angle cloth, the overall mechanical properties and deformation resistance of the composite board have been further improved improvement. Therefore, the composite board prepared by the preparation method of the composite board provided by the present invention has a stable structure, excellent mechanical properties, strong resistance to deformation, and has a good market application prospect.

Description

A kind of composite board and preparation method thereof

technical field

The invention relates to the field of composite materials, in particular to a composite board and a preparation method thereof.

Background technique

In recent years, with the rapid development of material engineering technology, textile structure reinforced composite materials have received more and more attention because of their advantages such as high specific strength, high specific stiffness and good impact resistance. Expand to multiple industrial fields such as civil, transportation, industry, aerospace, sports and entertainment, and expand deeper in various fields.

At present, with the continuous and in-depth research on reinforcement materials, the thick plain weave fabrics that have been woven from continuous fibers have gradually developed into non-woven reinforcement materials processed from high-strength modulus fibers, and three-dimensional fabrics formed by three-dimensional weaving processing methods. Fabrics, etc. However, due to the advantages of simple process, wide application range, and low cost by using thick plain weave fabrics to process two-dimensional laminates, two-dimensional fabrics are currently the mainstream textile structure reinforced composite materials used in various industries.

However, at present, the general two-dimensional fabrics have poor longitudinal and transverse deformation capabilities, which limits their application in many fields.

Contents of the invention

The purpose of the present invention is to provide a composite board, which has a stable structure, excellent mechanical properties, strong resistance to deformation, and has a good market application prospect.

Another object of the present invention is to provide a method for preparing a composite panel, which has a simple preparation process and can significantly improve the mechanical properties of the obtained composite material.

The present invention solves its technical problem and adopts the following technical solutions to realize.

The invention proposes a preparation method of a composite board, which includes: using filament strands to prepare a wide-angle cloth; laying the wide-angle cloth in multiple layers, and performing layer sealing and fixed connection, so that the laid multi-layer wide-angle cloth constitutes the reinforcement of the composite board layer; in the process of laying multi-layer wide-angle cloth, the multi-layer wide-angle cloth is rotated and dislocated so that the warp lines of two adjacent layers of wide-angle cloth have an included angle that is not equal to zero.

The present invention also proposes a composite board, which is prepared by the above-mentioned preparation method of the composite board.

The beneficial effects of the composite board and the preparation method thereof in the embodiment of the present invention are: the preparation method of the composite board provided by the present invention improves the mechanical properties of the composite board by using multi-layer wide-angle cloth as the reinforcing layer of the composite board; The multi-layer wide-angle cloth is arranged in dislocation and rotation, which further strengthens the structural stability and mechanical properties of the composite board, especially for the anti-deformation ability of the composite board. Therefore, the preparation method of the composite board provided by the embodiment of the present invention not only has the advantages of simple preparation process, but also the prepared composite board has strong structural stability, excellent mechanical properties, and strong resistance to deformation. The use of two-dimensional composite panels has a good market application prospect.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the multi-layer wide-angle cloth processed into the composite board provided by the embodiment of the present invention;

2 is a schematic diagram of the layered structure of the side edge of the composite board provided in Example 1 of the present invention;

Fig. 3 is a schematic diagram of the arrangement of the warps of the wide-angle cloth on different layers of the composite board provided in Example 1 of the present invention;

4 is a schematic diagram of the layered structure of the side edge of the composite plate provided in Example 2 of the present invention;

Fig. 5 is a schematic diagram of the warp arrangement arrangement of the wide-angle cloth on different layers of the composite board provided in Example 2 of the present invention;

Figure 6 is a schematic diagram of the layered structure of the side edge of the composite board provided in Example 3 of the present invention;

Fig. 7 is a schematic diagram of the arrangement of the warps of the wide-angle cloth on different layers of the composite board provided in Embodiment 3 of the present invention.

Icon: 100-composite board; 200-composite board; 300-composite board; 110-liquid storage tank; 120-multi-layer wide-angle cloth; 140-sealed plastic mold; 142-tee pipe; Negative pressure suction device.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. In addition, those that do not indicate specific conditions in the examples are carried out according to conventional conditions or conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, or the The usual orientation or positional relationship of the invention product in use is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; It can be directly connected, or indirectly connected through an intermediary, and can be internally connected between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The composite panel of the embodiment of the present invention and its preparation method are described in detail below.

The preparation method of the composite panel provided by the embodiment of the present invention comprises:

S1. A wide-angle cloth is prepared by using filament strands.

Specifically, the wide-angle cloth adopts high-performance fiber filament wide-angle cloth, and the raw material of the wide-angle cloth is selected from at least one filament strand in carbon fiber, aramid fiber and high modulus polyethylene fiber, and in the process of preparing the wide-angle cloth , the linear density of the filament strand is designed to be 35-60tex×2, preferably 40-56tex×2.

Furthermore, in the process of wide-angle cloth processing, it is necessary to control the width and warp and weft density, especially the warp and weft density. Among the embodiments of the present invention, the controlled warp and weft density is 150-180 threads/10cm. It should be noted that the warp and weft density represents the fabric density, wherein the warp direction is the length direction of the fabric, perpendicular to the width of the fabric, and the weft direction is the width direction of the fabric, parallel to the width.

Among the embodiments of the present invention, the reason why the warp and weft density of the wide-angle cloth is limited is that the size of the warp and weft density directly affects the physical and mechanical properties of the surface reinforcement layer of the composite board, feel, strength, flexural resistance, air permeability and wear resistance. Index, generally speaking, for the same fabric wide-angle cloth, the higher the warp and weft density, the better the quality, but, in this embodiment, the high warp and weft density will affect the product cost and production efficiency of the wide-angle cloth. Therefore, for the wide-angle cloth High or low warp and latitude are not conducive to the implementation of the preparation process. Only by controlling the warp and weft density at 150-180 threads/10cm can we reasonably control the processing cost and Processing efficiency.

S2. Laying the wide-angle cloth in multiple layers, so that the laid multi-layer wide-angle cloth constitutes a reinforcement layer of the composite board. It should be noted that in the process of laying multi-layer wide-angle cloth, the multi-layer wide-angle cloth is rotated and dislocated so that the warp lines of two adjacent layers of wide-angle cloth have an included angle that is not equal to zero.

Further, in the laying process of multi-layer wide-angle cloth, preferably, the following methods are selected:

Take the warp direction of the first layer of wide-angle cloth laid on the surface of the substrate as the reference direction, and take the center of the diagonal line of the first layer of wide-angle cloth as the rotation point, and turn clockwise 30 degrees as the warp yarn of the second layer of wide-angle cloth Then rotate 60 degrees in the clockwise direction as the layering direction of the warp yarn in the third layer of wide-angle cloth, and turn 90 degrees in the clockwise direction as the layering direction of the warp yarn in the fourth layer of wide-angle cloth. After turning 120 degrees clockwise, it is used as the layering direction of the warp yarn in the fifth layer of wide-angle cloth, and after 150 degrees in the clockwise direction, it is used as the layering direction of the warp yarn in the sixth layer of wide-angle cloth. After 180 degrees, it is used as the laying direction of the warp yarn in the seventh layer of wide-angle cloth, after turning 210 degrees in the clockwise direction, it is used as the laying direction of the warp yarn in the eighth layer of wide-angle cloth, after turning 240 degrees in the clockwise direction, it is used as the ninth layer The lamination direction of the warp yarns in the wide-angle cloth of the first layer is turned 270 degrees in the clockwise direction as the lamination direction of the warp yarns in the tenth layer of wide-angle cloth, and it is used as the warp yarn in the eleventh layer of wide-angle cloth after it is turned 300 degrees in the clockwise direction The layering direction of the layer is turned 330 degrees in the clockwise direction as the layering direction of the warp yarn in the twelfth layer of wide-angle cloth, that is, one cycle of twelve layers.

It should be noted that the reason why the multi-layer wide-angle cloth is laid in layers according to the above method is mainly to ensure the uniformity of the layer, so that the performance of the reinforcement layer in different directions can reach a relatively balanced stable state, so that the performance Good isotropic performance ensures the strength enhancement effect of the reinforcement layer.

In addition, it should also be noted that, in other embodiments, it is not limited to the above-mentioned one arrangement and laying method, where the rotation direction of the laying can be either clockwise or counterclockwise; The angle is not limited to the 30-degree intervals described in the above embodiments, as long as it is 0-30 degrees, such as 25 degrees, 20 degrees, 15 degrees, 10 degrees, and 5 degrees.

Further, in the process of laying the multi-layer wide-angle cloth, the multi-layer wide-angle cloth is cured and connected by resin transfer molding. It should be noted that among the embodiments provided by the present invention, the resin transfer molding method is an improved resin transfer molding method, that is, when the multi-layer wide-angle cloth is solidified and connected, the three-way pipe is used as the resin inlet, and the four-way pipe is used as the resin inlet. The through pipe is used as the negative pressure air suction port.

Specifically, referring to Fig. 1, after the multilayer wide-angle cloth 120 is completely sealed by the sealing mold 140, only the resin inlet and the air suction port are left. In the case of uneven distribution inside, the resin circulation pipe adopts a three-way pipe 142, that is, the resin flows out of the liquid storage tank 110 and is divided into two paths and rushed into the fully enclosed multi-layer wide-angle cloth 120, and the position of the filling inlet must be guaranteed. At the symmetrical position at both ends, in order to ensure that the resin is sucked uniformly and efficiently by the negative pressure airflow in the multi-layer wide-angle cloth 120 at the outlet, the other end corresponding to the resin circulation pipe is the air suction port The four-way pipeline 144 and the three-way pipeline 142 are respectively connected to the layer gaps of the multi-layer wide-angle cloth 120, and are respectively located at both ends and the middle position, and after converging, the outlet pipeline of the four-way pipeline 144 is connected to the negative pressure suction device 150.

It should be noted that the vacuuming operation was performed before and after the curing connection. Among them, the time of vacuuming before curing and connecting is 18-22 minutes, and the reason why the vacuuming operation is carried out before curing and connecting is to allow the air contained between the laid multi-layer wide-angle cloth 120 layers to be removed as clean as possible , and then improve the pre-treatment effect of the solidified connection; the time of vacuuming after the solidified connection is 25-35 minutes, and the reason why the vacuuming operation is carried out after the solidified connection is to pass the negative pressure suction device 150. The air contained in the resin between the layers is removed as much as possible to improve the curing connection effect between the layers of the final reinforced layer, so that the reinforced layer and its composite board have better mechanical properties.

The embodiment of the present invention also provides a composite board, which is prepared by the preparation method of the composite board provided in the above embodiment. It should be noted that the reinforcement layer of the composite board is formed by laying multiple layers of wide-angle cloth in rotation and interlacing, that is, the warp lines of two adjacent layers of wide-angle cloth have an included angle that is not equal to zero. It should be emphasized that the stability and mechanical properties of the composite board are greatly improved by dislocation and rotation of the multi-layer wide-angle cloth, especially the deformation resistance of the composite board is qualitatively improved.

The characteristics and performance of the present invention will be described in further detail below in conjunction with the examples.

Example 1

The preparation method of the composite board provided in this embodiment is prepared in the following manner:

The raw material of aramid filament strands is processed into wide-angle cloth. Among them, the specification of aramid filament linear density is 56tex×2, the warp and weft density is 176 threads/10cm, the width of wide-angle cloth is about 1.8m, and the cut length is 3.5m.

Lay multiple layers of cut wide-angle cloth on the substrate to form a reinforcement layer on the surface. Specifically, lay the first layer first, and take the first layer of wide-angle cloth warp as the reference direction, rotate 30 degrees clockwise as the arrangement direction of the second layer of wide-angle cloth warp (laid on the first layer), and use the second layer The wide-angle cloth warp is used as the reference direction and rotated 30 degrees clockwise as the arrangement direction of the third layer of wide-angle cloth warp (laid on the second layer), and so on, four layers, the fifth layer, ... the twenty-fourth layer , obtain the composite material of the two-dimensional reinforcement layer, trim it to 3m×3m, place it on a smooth flat plate coated with a release agent, and seal it with a sealing mold. One end of the composite material is connected to the two ends of the same side of the tee pipe ( Corresponding to the position close to the composite material), the other end of the tee pipe far away from the composite material is connected to the resin barrel, and the resin is continuously fed into the tee pipe through the resin barrel; One port of the cross pipe away from the composite material is connected with a vacuum suction device.

Before the preparation of the composite board, close the end of the tee pipe connected to the resin barrel, start the vacuum absorption device, and vacuumize for 20 minutes. After proportioning, fully stir and stand for about 8 minutes, open the three-way pipe to connect the resin barrel, the resin fluid will be divided into two ways through the three-way pipe and enter the sealed space of the plastic mold under the action of negative pressure. There are three negative pressure suction ports at one end, so the resin fluid can evenly maintain the same flow rate and flow through the entire interior of the reinforcement material. When the resin basically fills the interior of the reinforcement material, close the three-way pipe again in time, and the vacuum absorption device continues to work for 30 minutes, and then Seal one end of the vacuum absorbing device and leave it for 24 hours to completely cure the aramid filament wide-angle cloth-based reinforced vinyl resin two-dimensional composite board to obtain the finished composite board.

This embodiment provides a composite board 100, please refer to FIG. 2, which is prepared by the preparation method of the composite board provided in this embodiment, wherein the multi-layer wide-angle cloth in the reinforcement layer of the composite board 100 is arranged in a rotational dislocation, as shown in FIG. As shown in Figure 3, the included angle between the wide-angle warp lines of two adjacent layers is 30 degrees.

Example 2

The preparation method of the composite board provided in this embodiment is prepared in the following manner:

The raw material of aramid filament strands is processed into wide-angle cloth. Among them, the specification of aramid filament linear density is 48tex×2, the density of warp and weft is 180 threads/10cm, the width of wide-angle cloth is about 1.8m, and the interception length is 3.5m. .

Lay multiple layers of cut wide-angle cloth on the substrate to form a reinforcement layer on the surface. Specifically, lay the first layer first, and take the first layer of wide-angle cloth warp as the reference direction, rotate clockwise 20 degrees as the arrangement direction of the second layer of wide-angle cloth warp (laid on the first layer), and use the second layer The wide-angle cloth warp is used as the reference direction and rotated 20 degrees clockwise as the arrangement direction of the third layer of wide-angle cloth warp (laid on the second layer), and so on, four layers, the fifth layer, ... the thirty-sixth layer , obtain the composite material of the two-dimensional reinforcement layer, trim it to 3m×3m, place it on a smooth flat plate coated with a release agent, and seal it with a sealing mold. One end of the composite material is connected to the two ends of the same side of the tee pipe ( Corresponding to the position close to the composite material), the other end of the tee pipe away from the composite material is connected to the resin barrel, and the resin is continuously fed into the tee pipe through the resin barrel; One port of the cross pipe away from the composite material is connected with a vacuum suction device.

Before the preparation of the composite board, close the end of the tee pipe connected to the resin barrel, start the vacuum absorption device, and vacuum for 22 minutes. After proportioning, fully stir and stand for about 8 minutes, open the three-way pipe to connect the resin barrel, the resin fluid will be divided into two ways through the three-way pipe and enter the sealed space of the plastic mold under the action of negative pressure. There are three negative pressure suction ports at one end, so the resin fluid can evenly maintain the same flow rate and flow through the entire interior of the reinforcement material. When the resin basically fills the interior of the reinforcement material, close the three-way pipe again in time, and the vacuum absorption device continues to work for 35 minutes, and then Seal one end of the vacuum absorbing device and leave it for 24 hours to completely cure the aramid filament wide-angle cloth-based reinforced vinyl resin two-dimensional composite board to obtain the finished composite board.

This embodiment provides a composite board 200, please refer to FIG. 4, which is prepared by the preparation method of the composite board provided in this embodiment, wherein the multi-layer wide-angle cloth in the reinforcement layer of the composite board 200 is arranged in a rotational dislocation, as shown in FIG. As shown in Figure 5, the included angle between the wide-angle warp lines of two adjacent layers is 20 degrees.

Example 3

The preparation method of the composite board provided in this embodiment is prepared in the following manner:

The raw material of aramid filament strands is processed into wide-angle cloth. Among them, the linear density of aramid filament is 40tex×2, the warp and weft density is 150 threads/10cm, the width of the wide-angle cloth is about 1.8m, and the interception length is 3.5m. .

Lay multiple layers of cut wide-angle cloth on the substrate to form a reinforcement layer on the surface. Specifically, lay the first layer first, and take the first layer of wide-angle cloth warp as the reference direction, rotate clockwise 10 degrees as the arrangement direction of the second layer of wide-angle cloth warp (laid on the first layer), and use the second layer The wide-angle cloth warp is used as the reference direction and rotated 10 degrees clockwise as the arrangement direction of the third layer of wide-angle cloth warp (laid on the second layer), and so on, four layers, the fifth layer, ... the thirty-sixth layer , obtain the composite material of the two-dimensional reinforcement layer, trim it to 3m×3m, place it on a smooth flat plate coated with a release agent, and seal it with a sealing mold. One end of the composite material is connected to the two ends of the same side of the tee pipe ( Corresponding to the position close to the composite material), the other end of the tee pipe far away from the composite material is connected to the resin barrel, and the resin is continuously fed into the tee pipe through the resin barrel; One port of the cross pipe away from the composite material is connected with a vacuum suction device.

Before the preparation of the composite board, close the end of the tee pipe connected to the resin barrel, start the vacuum absorption device, and vacuum for 18 minutes. After proportioning, fully stir and let it stand for about 8 minutes, open the three-way pipe to connect the resin barrel, the resin fluid will be divided into two ways through the three-way pipe under the action of negative pressure and enter the space sealed by the plastic mold. There are three negative pressure suction ports at one end, so the resin fluid can evenly maintain the same flow rate and flow through the entire interior of the reinforcement material. When the resin basically fills the interior of the reinforcement material, close the three-way pipe again in time, and the vacuum absorption device continues to work for 25 minutes, and then Seal one end of the vacuum absorbing device and leave it for 24 hours to completely cure the aramid filament wide-angle cloth-based reinforced vinyl resin two-dimensional composite board to obtain the finished composite board.

This embodiment provides a composite board 300, please refer to FIG. 6, which is prepared by the preparation method of the composite board provided in this embodiment, wherein the multi-layer wide-angle cloth in the reinforcement layer of the composite board 300 is arranged in a rotational dislocation, as shown in FIG. As shown in Figure 7, the included angle between the wide-angle warp lines of two adjacent layers is 10 degrees.

In summary, the preparation method of the composite board provided by the present invention improves the mechanical properties of the composite board by adopting multi-layer wide-angle cloth as the reinforcing layer of the composite board; The structural stability and mechanical properties of the composite board are improved, especially the anti-deformation ability of the composite board is greatly promoted; the multi-layer wide-angle cloth is cured and connected by the improved resin transfer molding method, so that the reinforcement layer The reinforcement effect is better, which further improves the overall mechanical properties of the composite board.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of preparation method of composite plate, it is characterised in that it includes：

Wide-angle cloth is prepared using filament yarns；

Paved in multi-layers is carried out to the Wide-angle cloth, and carries out layer being sealedly and fixedly connected so that Wide-angle cloth structure described in the multilayer of laying Into the enhancement layer of the composite plate；

Lay during Wide-angle cloth described in multilayer, rotary shifted arrangement is carried out to Wide-angle cloth described in multilayer so that adjacent two layers The warp of the Wide-angle cloth has the angle that the angle number of degrees are not equal to zero.

2. the preparation method of composite plate according to claim 1, it is characterised in that the angle is less than or equal to 30 degree.

3. the preparation method of composite plate according to claim 2, it is characterised in that Wide-angle cloth process described in laying multilayer In, using the cornerwise center of Wide-angle cloth described in preceding layer as the point of rotation, later layer is laid according to being rotated clockwise 30 degree The Wide-angle cloth.

4. the preparation method of composite plate according to claim 1, it is characterised in that in the mistake of Wide-angle cloth described in laying multilayer Cheng Zhong, solidification connection is carried out using resin transfer molding practice by Wide-angle cloth described in multilayer.

5. the preparation method of composite plate according to claim 4, it is characterised in that solidify to Wide-angle cloth described in multilayer Negative pressure air pump orifice is used as using four-way pipe as resin inlet using three-way pipe during connection.

6. the preparation method of composite plate according to claim 5, it is characterised in that before and after solidification connection is carried out Vacuum pumping is carried out.

7. the preparation method of composite plate according to claim 1, it is characterised in that the material of the filament yarns is that carbon is fine At least one of dimension, aramid fiber and polyethylene fibre.

8. the preparation method of composite plate according to claim 1, it is characterised in that the line density of the filament yarns is 35-60tex×2。

9. the preparation method of composite plate according to claim 8, it is characterised in that the line density of the filament yarns is 40-56tex×2。

10. a kind of composite plate, it is characterised in that the composite plate is by answering described in the claims 1-9 any one The preparation method of plywood prepares gained.