CN108705817A - A kind of multifunctional light thermoplastic composite board material and preparation method thereof - Google Patents

Abstract

This application involves a kind of multifunctional light thermoplastic composite board material and preparation method thereof, multifunctional light thermoplastic composite board material is made of multiple thermoplastic composite board materials bonding, it is characterised in that multiple thermoplastic composite board materials heat pressurizing binding by mutual joint face and are molded.The thermoplastic composite board material uses thermoplastic composite honeycomb board, monolayer thermoplastic composite honeycomb board to have sandwich structure, and epicuticle, lower epidermis are glass fiber reinforcement thermoplastic composite, and middle section is plastic honeycomb.The application further includes the production method of above-mentioned multifunctional light thermoplastic composite board material.The application has 1, light weight, intensity height, structural stability good；2, impact resistance is hardly damaged；3, antiacid caustic corrosion, without putrefaction do not absorb water, and easily rinse, easily dry, and are not damaged by worms and are corroded with bacterium；4, applicable various severe working environments；5, service life is long, and material and technology environmental protection is not necessarily to glue, the features such as being recycled.

Description

A kind of multifunctional lightweight thermoplastic composite board and its manufacturing method

technical field

The application relates to a multifunctional lightweight thermoplastic composite board and a manufacturing method thereof, which are mainly applicable to the manufacture of multilayer thermoplastic reinforced honeycomb boards.

Background technique

At present, the materials used for large-scale carriage panels and mobile prefabricated houses mainly include steel-wood structures, cement prefabricated composite panels, and color steel sandwich panels. Each of these classes of panels has a number of disadvantages. For example: steel and wood structures, easily damaged or cracked; absorb moisture, liquids and odors; can be contaminated by termites and insects, loose nails, etc., especially in today's situation of large-scale forest loss, its use is limited. Cement prefabricated composite panels, the load-bearing system is all steel structure, the wall is made of double-layer steel wire mesh, lightweight insulation materials and high-grade cement prefabricated composite panels, thermal insulation, heat insulation, light weight, high strength, machine-made cement tiles for the top surface, exterior The wall is painted with colored water. Its preparation cycle is long, its own weight is relatively large, and cracking will occur after long-term use, and its cost is relatively expensive. Color steel sandwich panel is a common product in the current building materials. Three kinds of board materials are commonly used in the internal interlayer of color steel plate, rock wool sandwich panel, polyurethane sandwich panel and polystyrene sandwich panel. Among them, the two materials of polyurethane sandwich panel and polystyrene sandwich panel are flammable materials. Once heated, they are easy to burn and spread when exposed to open flames; moreover, the maintenance cost is high, the resistance to shortfall is poor, and the thermal insulation and sound insulation effects are poor. , Weak wind resistance and poor snow pressure resistance.

Contents of the invention

The technical problem to be solved by this application is to overcome the above-mentioned deficiencies in the prior art, and to provide a multi-functional lightweight thermoplastic composite sheet manufacturing method with simple structure, convenient use, low cost and good effect.

The technical solutions adopted by this application to solve the above technical problems include:

A multifunctional lightweight thermoplastic composite board is composed of a plurality of thermoplastic composite boards bonded together, and is characterized in that the plurality of thermoplastic composite boards are bonded and formed by heating and pressurizing the mutual connection surfaces.

The thermoplastic composite board adopts a thermoplastic composite honeycomb board. The single-layer thermoplastic composite honeycomb board has a sandwich structure. The upper and lower skins are made of glass fiber reinforced thermoplastic composite material (CFT), and the middle part is a plastic honeycomb. The glass fiber reinforced thermoplastic composite material is made of continuous fibers and thermoplastic material (pellets or sheets), and the thermoplastic material is selected from PP (polypropylene), PE (polyethylene), PA6 (nylon 6) or PBT (Polybutylene terephthalate) one or two or more. The continuous fiber is selected from one or more than two kinds of glass fiber, carbon fiber or basalt fiber.

The technical solution adopted by the present application to solve the above-mentioned technical problems also includes:

A method for making a multifunctional lightweight thermoplastic composite board, characterized by comprising the following steps:

A. Two single-layer thermoplastic composite panels are respectively fixed on the opposite upper and lower sides of the press;

B. The heating plate enters the middle of the press, and heats the opposite surfaces of the upper and lower thermoplastic composite plates. The heating temperature is between 190 and 220 degrees Celsius. After reaching the molten state of the upper and lower thermoplastic composite plates, the relative surfaces are quickly removed;

C. The press with cooling water circulation pressurizes and cools the upper and lower thermoplastic composite plates whose opposite surfaces are in a molten state, so that they can be melted and bonded;

D. The upper press platform is lifted;

E. Judging whether the number of layers of thermoplastic composite panels required by the design has been met,

When the support pressure plate of the lower press is not reached, the thickness of the single-layer thermoplastic composite sheet is lowered, and the single-layer thermoplastic composite sheet is placed under the platform of the upper press, and the step B is continued to carry out the compounding of the thermoplastic composite sheet;

If it is achieved, the preparation of the multi-layer thermoplastic composite sheet is completed and exited.

This application can preheat the heating plate according to the actual needs. The preheating (heating) method includes infrared heating, electric heating or heat conduction oil heating. The preheating can be before or at the same time as step A or after step A and before step B.

The thermoplastic composite board described in this application adopts a thermoplastic composite honeycomb board.

The multi-functional lightweight composite board of this application adopts thermoplastic honeycomb as the core material in structure, which greatly reduces the weight of the board, and increases its elasticity and compression resistance; the skin adopts glass fiber reinforced thermoplastic composite material, which greatly increases the weight of the board. The impact resistance and puncture resistance of the board. The multi-layer composite superimposed structure enables the multi-layer composite board to achieve high compressive strength and flexural strength, and achieve the effects of heat preservation and sound insulation.

The thickness of the thermoplastic composite honeycomb panel is 8-50 mm.

The thickness of the heating plate is 5-50 mm.

The length of the press machine ranges from 1 to 14 meters, and the width is 0.5 to 3 meters;

The multi-layer thermoplastic composite board can be made into boards of different specifications such as 2 layers, 3 layers or even more layers according to the load-bearing capacity and the needs of thermal insulation and sound insulation, and the total thickness ranges from 8mm to 300mm.

According to the process requirements, the multi-layer thermoplastic composite board can also add embedded parts in the middle to improve the overall rigidity and strength and facilitate connection.

The bending strength of the single-layer thermoplastic composite plate is ≥220 MPa, and the dynamic load capacity is ≥2 tons. With the increase of the number of superimposed layers, the bending strength and bearing capacity are gradually increased.

This application adopts multi-layer thermoplastic reinforced honeycomb panels, which are formed by hot-melt bonding and pressure molding. This application can make full use of the characteristics of thermoplastic reinforced honeycomb panel composite materials:

1. Light weight, high strength and good structural stability;

2. Anti-impact, not easy to damage, and effectively compensate for the loss caused by misoperation;

3. Resistant to acid and alkali corrosion, no rot, no water absorption, easy to wash, easy to dry, free from insects and bacteria;

4. Applicable to various harsh working environments (normal use at -40°C~80°C), suitable for cold storage turnover and use in cold areas;

5. Long service life, environmentally friendly materials and processes, no need for glue, and recyclable.

Description of drawings

Fig. 1 is a schematic diagram of a state of the embodiment of the present application, at this time, two single-layer thermoplastic composite panels are respectively fixed on the opposite upper and lower sides of the press, and the heating plate is located between the two single-layer thermoplastic composite panels.

Fig. 2 is a schematic diagram of another state of the embodiment of the present application. At this time, the upper and lower faces of the two single-layer thermoplastic composite plates are heated, and the heating plate is quickly moved out.

Fig. 3 is a schematic diagram of another state of the embodiment of the present application. At this time, the heating plate has been moved out, and the upper press is moved down, ready to press and bond two single-layer thermoplastic composite boards.

Fig. 4 is a schematic diagram of another state of the embodiment of the present application, at this time, two single-layer thermoplastic composite sheets are pressed and bonded and kept for a period of time.

Fig. 5 is a schematic diagram of another state of the embodiment of the present application. At this time, the two single-layer thermoplastic composite sheets that have been pressed and bonded form a double-layer thermoplastic composite sheet and move down a distance. The new single-layer thermoplastic The composite sheet is fixed under the upper press, and the heating plate is positioned between the new single-layer thermoplastic composite sheet and the double-layer thermoplastic composite sheet to heat the opposing sides of the two.

Fig. 6 is a schematic structural view of a single-layer thermoplastic composite sheet according to an embodiment of the present application.

Detailed ways

The present application will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present application and the present application is not limited to the following examples.

Referring to Fig. 6, the multi-functional lightweight thermoplastic composite board of the present application is formed by heating and pressurizing bonding of multiple thermoplastic composite boards through mutual connection surfaces.

The thermoplastic composite board is a thermoplastic composite honeycomb board. The single-layer thermoplastic composite honeycomb board 1 has a sandwich structure similar to a sandwich, and is composed of an upper skin 11, a plastic honeycomb 12 and a lower skin 13 connected in sequence.

The manufacturing method of the above-mentioned multifunctional lightweight thermoplastic composite sheet, as shown in Figures 1 to 5, includes the following steps:

(1) Place the two single-layer thermoplastic composite honeycomb panels 1 that have been cut to size in the press 2 and fix them up and down;

(2) Put the heating plate 3 in the middle of the press 2. The heating plate 3 has been heated up (preheated) in advance, and the heating plate 3 is placed between the upper and lower thermoplastic composite honeycomb panels to heat for 15~20s, see Figure 1; ( 3) The heating plate 3 is moved out at a high speed of 2 m/s, as shown in Figure 2; (4) The upper press platform 21 is pressed down, and the upper and lower thermoplastic composite honeycomb panels are pressed and bonded together, and the pressure is maintained for 20s~ 3 minutes, see Figure 3, Figure 4.

(5) After the pressure holding is completed, the upper press platform 21 is lifted,

(6) Judging whether the number of layers of thermoplastic composite panels required by the design has been met,

When it is not reached, the supporting platen 22 of the lower press lowers the thickness of the single-layer thermoplastic composite sheet 1, puts the single-layer thermoplastic composite sheet 1 under the platform 21 of the upper press, and proceeds to step (2) to continue compounding the thermoplastic composite sheet;

If it is achieved, the preparation of multi-layer (more than two layers) thermoplastic composite sheet 1-1 will be completed and exited.

The heating temperature in the step (2) is 190-255° C., the pressure-holding cooling and setting time is 20s-3min, and the moving speed of the heating plate 3 must reach at least 2m/s.

Compared with the prior art, the beneficial effects of the present invention are as follows:

The production process of the prior art is manual glue brushing or machine spraying glue, and then pressurized layer by layer bonding. The processing speed of the present invention is fast, and it only needs a short time of heating and pressing to form rapidly, and the production efficiency is much higher than that of the traditional technology. The processing time is only 1/5 of the prior art, and the labor cost is much less.

The continuous glass fiber reinforced thermoplastic composite material has high tensile strength and impact resistance. The honeycomb core material in the middle has an air layer, which has good thermal insulation and sound insulation effects.

Strong bearing capacity, hot-melt bonding between the boards, good bonding strength, corrosion resistance, light weight and high strength honeycomb board structure, light weight, strong impact resistance, corrosion resistance, composite process using hot pressing molding, No glue required.

The invention adopts thermoplastic composite material, which is environmentally friendly and can be 100% recycled, which meets the needs of current environmental protection development and is a green material.

Any simple modification or combination of the technical features and technical solutions of the present application shall be deemed to fall within the protection scope of the present application.

Claims (6)

1. a kind of multifunctional light thermoplastic composite board material is made of multiple thermoplastic composite board materials bonding, it is characterised in that：Multiple heat Plastic composite board heats pressurizing binding molding by mutual joint face.

2. multifunctional light thermoplastic composite board material according to claim 1, it is characterized in that：The thermoplastic composite board material uses Thermoplastic composite honeycomb board, monolayer thermoplastic composite honeycomb board have sandwich structure, and epicuticle, lower epidermis are glass fibre Enhance thermoplastic composite, middle section is plastic honeycomb.

3. multifunctional light thermoplastic composite board material according to claim 2, it is characterized in that：The glass fiber reinforcement thermoplastic is multiple Condensation material is made of continuous fiber and thermoplastic material, and the thermoplastic material is polypropylene, polyethylene, nylon 6, gathers to benzene The combination of one or more of dioctyl phthalate butanediol ester, the continuous fiber are glass fibre, carbon fiber or the Black Warrior The combination of one or more of rock fiber.

4. multifunctional light thermoplastic composite board material according to claim 2, it is characterized in that：The thermoplastic composite honeycomb board Thickness is 8 ~ 50mm.

5. multifunctional light thermoplastic composite board material according to claim 1, it is characterized in that：The thermoplastic composite board material of single layer is bent Intensity >=220MPa, dynamic load load-bearing >=2 ton.

6. a kind of production method of multifunctional light thermoplastic composite board material, it is characterized in that including the following steps：

A, two monolayer thermoplastic composite boards are separately fixed at the opposite top and bottom of press；

B, heating plate enters among press, is heated to upper and lower thermoplastic composite board material apparent surface, heating temperature 190 ~ Between 220 degrees Celsius, quickly removed after reaching upper and lower thermoplastic composite board material apparent surface's molten condition；

C, the press with cooling water circulation carries out pressurization cooling to the upper and lower thermoplastic composite board material that apparent surface is molten condition It is compound, make its melting adhered；

D, press platform in top lifts；

E, judge that the thermoplastic composite board material number of plies of design requirement reaches and do not have,

Lower press support pressing plate declines the thickness of monolayer thermoplastic composite board when not reaching, and list is put under the press platform of top Layer thermoplastic composite board material, turning step B, to continue thermoplastic composite board material compound；

The preparation of this Multi-layer thermal plastic composite board is completed if reaching to exit.