Continuous preparation method of carbon fiber reinforced PPS sheet

Abstract

The invention discloses a continuous preparation method of a carbon fiber reinforced PPS (polyphenylene sulfide) sheet, which is characterized by comprising the following steps: adding dried PPS resin into two extruders, and simultaneously carrying out melt extrusion from the two extruders to form two layers of PPS melts; unwinding the carbon fiber yarns through an unwinding machine; the two layers of PPS melt and carbon fiber yarn are subjected to hot pressing, a composite sheet is obtained after hot pressing, and the composite sheet is cooled and cured to obtain the carbon fiber reinforced PPS sheet; drawing the cooled and cured composite sheet material, namely the prepared carbon fiber reinforced PPS sheet material, by using a drawing roller, measuring the thickness, using a film storage frame, detecting flaws, and then rolling; and the unwinding speed, the traction speed and the winding speed are kept consistent. The continuous large-scale preparation of the carbon fiber reinforced PPS sheet is realized, the production efficiency is high, and the prepared carbon fiber reinforced PPS sheet has the characteristics of high mechanical strength, good stiffness, good puncture resistance and the like, is suitable for being applied to high-strength sheets or plates, and is high in practicability.

Description

Technical Field

[0001] The present invention belongs to the preparation of high-functional layered sheets, and relates to a continuous preparation method of a carbon fiber reinforced PPS sheet. The carbon fiber reinforced PPS sheet prepared by the present invention is suitable for use as a high-strength sheet or plate, and can be made into products such as laptop computer shells, home appliance shells, furniture decorative panels, automobile interior panels, sports equipment, high-speed rail and airplane small table boards, etc. Background Art

[0002] Carbon fiber is an inorganic polymer fiber with a carbon content of more than 90%. The fiber molecular chain is mainly connected by carbon-carbon single bonds. It has high axial tensile strength and modulus, no creep, good fatigue resistance, specific heat and conductivity between metal and non-metal, and low thermal expansion. Carbon fiber has a low density and is lighter than metal aluminum, but its strength is higher than steel. It also has the characteristics of corrosion resistance and high modulus. It is an important raw material for high-strength composite materials and has important applications in national defense, military industry and civilian use. Carbon fiber not only has the inherent intrinsic properties of carbon materials, but also has the softness and processability of textile fibers. It is often used as a reinforcing fiber. However, it has poor impact resistance, is expensive (compared with glass fiber and polymer fiber), and has a certain conductivity.

[0003] Polyphenylene sulfide (PPS) is a high molecular polymer containing benzene rings, which has the advantages of high mechanical strength, low polarity, corrosion resistance, high temperature resistance, good flame retardancy, good insulation performance, low dielectric constant and dielectric loss, etc. PPS is mainly used in the automotive industry, accounting for 45%, such as exhaust valves, water pump impellers, signal conditioners, etc.; the application in the field of electronic appliances accounts for 30%, such as: generators, starter coils, shielding covers, blades, high-voltage housings and sockets, transformers, piston rings, etc.; other applications are mainly concentrated in fibers, such as high-temperature filter bags, etc.

[0004] In the prior art, common carbon fiber composite materials are mainly made in the form of prepregs, that is, carbon fiber textile cloth or textile tape is impregnated with a thermosetting resin and then heated and cured to form a rigid and high-strength composite material. For example, CN110485024A discloses "a carbon fiber prepreg fabric" and CN108437485A discloses "a method for manufacturing a blade main beam using wet prepreg carbon fiber untwisted yarn". The disadvantages are that the resin system is limited, a large amount of solvent evaporates, and long-term heat preservation is required during heat curing, which consumes a lot of energy. The two-step process results in low production efficiency, and the resulting products cannot be recycled. The preparation of composite materials from thermoplastic resins and carbon fibers mainly involves first preparing the carbon fibers into powdered short fibers, then subjecting them to twin-screw modification with thermoplastic resins, and finally preparing them into devices by injection molding or hot pressing. For example, the content disclosed in "A thermoplastic carbon fiber composite sheet and production method" disclosed in CN109537161A is suitable for thermoplastic materials, but is only used for injection molding and cannot be used for the preparation of thin sheets. In addition, carbon fibers are not in a mesh structure, and their tensile strength is much lower than that of continuous fiber composite materials. Carbon fiber and thermoplastic materials are used to prepare sheets or plates, mainly by intermittent pressing, that is, placing carbon fiber textile cloth and thermoplastic material (powder or sheet) in a mold, heating the thermoplastic material to melt it, and then pressing it to form a composite product with different appearance shapes. For example, the content disclosed in "A production process of thermoplastic carbon fiber products" disclosed in CN108162424A is that the existing method is a two-step method, namely sheet preparation and hot pressing molding, which requires a lot of equipment investment, high equipment requirements, more product waste, low molding efficiency, low production efficiency, and cannot be continuously produced, thin sheets cannot be prepared, and coils cannot be prepared. It cannot be used in large-size composite materials (such as truck compartment structures, aircraft wings, high-speed rail compartment structures, etc.).

[0005] However, there is no report on the process of continuously preparing composite sheets from PPS resin and carbon fiber. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, such as the inability to carry out continuous production and the inability to prepare thin sheets. The present invention combines PPS sheet production and hot pressing technology, forms in one step, and performs online hot pressing treatment on a double-layer PPS melt and a carbon fiber yarn. The thickness of the composite sheet is controlled by pressure and roller speed, and a thin sheet can be prepared. The thickness can be adjusted online, thereby providing a continuous preparation method for a carbon fiber reinforced PPS sheet having the characteristics of simple equipment, continuous production, high mechanical strength (70% higher than that of carbon fiber powder reinforced composite materials), adjustable sheet thickness, and good film toughness.

[0007] The present invention is to provide a continuous preparation method of a carbon fiber reinforced PPS sheet, which is characterized by comprising the following steps:

[0008] a. Dry the PPS resin (added to a drying tank) and set aside;

[0009] b. Add the dried PPS resin (through a pipeline) into two extruders, and simultaneously melt and extrude it from the two extruders at a temperature of 300-340° C. to form two layers of PPS melt; and simultaneously unwind the carbon fiber yarn through an unwinder so that the carbon fiber yarn is located between the two layers of PPS melt;

[0010] c. Hot-press two layers of PPS melt and carbon fiber yarn at a hot pressing roller temperature of 80-130°C to obtain a composite sheet, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet. The composite sheet obtained after hot pressing is easy to solidify due to the thermal conductivity of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower.

[0011] The continuous preparation method of the carbon fiber reinforced PPS sheet described in the present invention is characterized by further comprising the following steps:

[0012] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0013] The speeds of unwinding, pulling (after hot pressing) and winding are kept consistent, and preferably are all 3 to 10 m / min.

[0014] In the context of the present invention: the carbon fiber yarn described in step b can be a single layer or an overlapping double layer carbon fiber yarn.

[0015] In the content of the present invention: the temperature of the drying treatment in step a is 150° C. and the drying time is 4 hours.

[0016] In the content of the present invention: the thickness of the carbon fiber yarn in step b can be 10-30 μm, and the mesh diameter can be 10-35 μm.

[0017] In the context of the present invention: the thickness of the carbon fiber reinforced PPS sheet obtained in step c can be 0.08 to 1.5 mm.

[0018] In the content of the present invention: the PPS resin described in step a is a product manufacturer and model of A900 of Toray Industries, Ltd. of Japan, PPS EC-10 of DIC Corporation of Japan, PPS Z-200-E5 of DIC Corporation of Japan, Ryton P-4 of Solvay Group of Belgium, Ryton R-4 of Solvay Group of Belgium, PPS3514 of Zhejiang New Ho-Cheng Co., Ltd., PPS 3508P of Zhejiang New Ho-Cheng Co., Ltd., Fortron 0203 of Celanese Corporation of the United States, Fortron 0214 of Celanese Corporation of the United States, GAF01 of Chongqing Jushi New Material Technology Co., Ltd., and GAF02 of Chongqing Jushi New Material Technology Co., Ltd., or a mixture of two or more thereof;

[0019] The melt index of the PPS resin is 50-200 g / 10 min (316° C., 5 kg).

[0020] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0021] (1) The method of the present invention combines resin sheet extrusion and hot pressing processes, first melts the PPS resin into a sheet, and before the resin is cooled, hot presses and flattens two layers of PPS resin and one or two layers of carbon fiber yarn to form an isotropic PPS carbon fiber composite sheet (i.e., carbon fiber reinforced PPS sheet);

[0022] (2) Common carbon fiber composite plates use an intermittent hot pressing method, and the carbon fiber yarn is laid flat. The carbon fiber yarn is not controlled by strong force, and displacement or wrinkling will occur during the hot pressing process. The method of the present invention applies tension to the carbon fiber yarn through a traction roller, and then uses a correction roller to keep the carbon fiber yarn flat, so that wrinkles will not be formed during the pressing process;

[0023] (3) The method of the present invention adopts a roll-to-roll production method, which can enable continuous production of composite sheets, and improve production efficiency by 30-40% (compared with the existing two-step method of sheet preparation + hot pressing molding). With the help of automatic winding and unwinding equipment, it can reduce manpower input and ensure product stability;

[0024] (4) Since carbon fiber yarn has high strength and no obvious difference in the longitudinal and transverse directions, and PPS is also a material with high strength among thermoplastic materials, the PPS carbon fiber composite material prepared by the method of the present invention has very high strength and strong rigidity, and can be used in high-strength plate structural parts, and can partially replace the application of steel to achieve lightweight downstream parts;

[0025] (5) The method of the present invention can prepare thin sheets and thick plates with good thickness uniformity. The thinnest sheet of 0.08 mm can be prepared by using a single-layer carbon fiber yarn, and conventional hot pressing cannot prepare such a thin product; the thickest plate of 1.5 mm can be prepared by using a double-layer carbon fiber yarn. Single-layer carbon fiber yarn is usually used for composite sheets below 0.5 mm;

[0026] (6) The method of the present invention can realize customized design of composite sheet surface texture and roughness through the surface of hot pressing roller, for example, preparing common sheet surface morphologies such as fine sand, coarse sand, and smooth surface. At the same time, a steel roller with a company logo can also be designed and reversely hot pressed on the surface of PPS sheet to form a PPS carbon fiber composite sheet with identity.

[0027] (7) The method of the present invention can be used to prepare a rolled composite material, which has good application in the field of long size, can reduce the splicing process in the downstream use process, reduce the stress weakness of large-size parts, and can be used in the fields of truck carriages, aircraft wings, high-speed rail carriages, etc.

[0028] (8) The PPS carbon fiber composite sheet prepared by the method of the present invention has the characteristics of low thermal shrinkage, ensuring that the product has good dimensional stability and also has good flame retardancy;

[0029] (9) The preparation process of the present invention is simple and easy to operate, and realizes the continuous large-scale preparation of carbon fiber reinforced PPS sheets. The prepared carbon fiber reinforced PPS sheets have the characteristics of high mechanical strength, good stiffness, good puncture resistance, etc., and are suitable for use in high-strength sheets or plates, and have strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic cross-sectional structure diagram of the carbon fiber reinforced PPS sheet prepared in the present invention and the examples;

[0031] Figure 2 It is a production process flow chart of the present invention and embodiments;

[0032] Figure 3 1 is a diagram of the preparation process of the carbon fiber reinforced PPS sheet of the present invention and its embodiments;

[0033] In the figure: 1-feeding hopper, 2-single screw extruder, 3-die, 4-unwinder, 5-unwinding guide roller, 6-unwinding correction roller, 7-carbon fiber yarn, 8-molten PPS melt sheet, 9-heat pressing roller, 10-traction rubber roller, 11 and 12-cooling roller, 13-traction roller, 14-thickness gauge, 15 and 17-traction roller, 18-film storage rack, 19-traction roller, 20-defect detector, 21-winder. DETAILED DESCRIPTION

[0034] The following embodiments are intended to further illustrate the present invention, but should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by technicians in this field based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0035] Embodiment 1: See accompanying drawing.

[0036] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0037] a. PPS resin (PPS 3508P, melt index 130g / 10min) was added to a drying tank and dried for standby use; the drying temperature was 150°C and the drying time was 4h;

[0038] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude it from the two extruders at the same time. The extrusion temperature is 300°C to form two layers of PPS melt; and at the same time, unwind the single-layer carbon fiber yarn through an unwinder so that the carbon fiber yarn is located between the two layers of PPS melt;

[0039] The carbon fiber yarn has a thickness of 10 μm and a mesh diameter of 15 μm;

[0040] c. Hot pressing two layers of PPS melt and carbon fiber yarn, the temperature of the hot pressing roller is 80°C, and a composite sheet is obtained after hot pressing, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet; the composite sheet obtained after hot pressing is easy to solidify due to the heat conduction of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower;

[0041] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0042] The speeds of unwinding, traction after hot pressing and winding are consistent and are all 10m / min;

[0043] The thickness of the prepared carbon fiber reinforced PPS sheet is 0.08 mm.

[0044] Embodiment 2:

[0045] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0046] a. PPS resin (A900, melt index 200g / 10min) was added to a drying tank and dried for standby use; the drying temperature was 150°C and the drying time was 4h;

[0047] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude from the two extruders at the same time, with an extrusion temperature of 315° C. to form two layers of PPS melt; and simultaneously unwind the two layers of carbon fiber yarn through an unwinder, so that the carbon fiber yarn is located between the two layers of PPS melt;

[0048] Each layer of the carbon fiber yarn has a thickness of 30 μm and a mesh diameter of 10 μm;

[0049] c. Hot pressing two layers of PPS melt and double layers of carbon fiber yarn, the temperature of the hot pressing rollers is 130°C, and a composite sheet is obtained after hot pressing, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet; the composite sheet obtained after hot pressing is easy to solidify due to the heat conduction of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower;

[0050] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0051] The speeds of unwinding, traction after hot pressing and winding are consistent and are all 3m / min;

[0052] The thickness of the prepared carbon fiber reinforced PPS sheet is 1.5 mm.

[0053] Embodiment 3:

[0054] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0055] a. Add PPS resin (PPS 3508P, melt index is 130g / 10min; GAF01, melt index is 80g / 10min, PPS resin is a mixture of the two in a mass ratio of 1:1) into a drying tank and dry it for later use; the drying temperature is 150°C and the drying time is 4h;

[0056] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude from the two extruders at the same time, with an extrusion temperature of 320° C. to form two layers of PPS melt; and simultaneously unwind the two layers of carbon fiber yarn through an unwinder, so that the carbon fiber yarn is located between the two layers of PPS melt;

[0057] Each layer of the carbon fiber yarn has a thickness of 30 μm and a mesh diameter of 10 μm;

[0058] c. Hot pressing two layers of PPS melt and double layers of carbon fiber yarn, the temperature of the hot pressing rollers is 110°C, a composite sheet is obtained after hot pressing, and the composite sheet is cooled and solidified to obtain a carbon fiber reinforced PPS sheet; the composite sheet obtained after hot pressing is easy to solidify due to the heat conduction of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower;

[0059] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0060] The speeds of unwinding, traction (after hot pressing) and winding are consistent and are all 4m / min;

[0061] The thickness of the prepared carbon fiber reinforced PPS sheet is 1.2 mm.

[0062] Embodiment 4:

[0063] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0064] a. Add PPS resin (PPS EC-10, melt index is 145g / 10min; Ryton R-4, melt index is 180g / 10min, PPS resin is a mixture of the two in a mass ratio of 3:7) into a drying tank and dry it for later use; the drying temperature is 150°C and the drying time is 4h;

[0065] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude from the two extruders at the same time, with an extrusion temperature of 340° C. to form two layers of PPS melt; and simultaneously unwind the two layers of carbon fiber yarn through an unwinder, so that the carbon fiber yarn is located between the two layers of PPS melt;

[0066] In the carbon fiber yarn, two layers of carbon fiber yarn have different thicknesses and pore sizes, one layer of carbon fiber yarn has a thickness of 20 μm and a mesh diameter of 35 μm; the other layer of carbon fiber yarn has a thickness of 30 μm and a mesh diameter of 10 μm;

[0067] c. Hot pressing two layers of PPS melt and double layers of carbon fiber yarn at a hot pressing roller temperature of 130°C to obtain a composite sheet, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet. The composite sheet obtained after hot pressing is easy to solidify due to the thermal conductivity of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower.

[0068] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0069] The speeds of unwinding, traction (after hot pressing) and winding are consistent, and are all 5.6m / min;

[0070] The thickness of the prepared carbon fiber reinforced PPS sheet is 0.8 mm.

[0071] Embodiment 5:

[0072] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0073] a. Add PPS resin (GAF02, melt index is 160g / 10min) into a drying tank and dry it for later use; the drying temperature is 150°C and the drying time is 4h;

[0074] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude from the two extruders at the same time, with an extrusion temperature of 330° C. to form two layers of PPS melt; and at the same time, unwind the single-layer carbon fiber yarn through an unwinder, so that the carbon fiber yarn is located between the two layers of PPS melt;

[0075] The carbon fiber yarn has a thickness of 20 μm and a mesh diameter of 35 μm;

[0076] c. Hot-press two layers of PPS melt and carbon fiber yarn at a hot pressing roller temperature of 100°C to obtain a composite sheet, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet. The composite sheet obtained after hot pressing is easy to solidify due to the thermal conductivity of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower.

[0077] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0078] The speeds of unwinding, traction (after hot pressing) and winding are consistent and are all 7m / min;

[0079] The thickness of the prepared carbon fiber reinforced PPS sheet is 0.43 mm.

[0080] The performance indicators of the carbon fiber reinforced PPS sheets prepared in Examples 1 to 5 are shown in Table 1 below.

[0081] Table 1: Performance index table of carbon fiber reinforced PPS sheets prepared in Examples 1 to 5:

[0082]

[0083] From the data shown in Table 1, it can be concluded that the carbon fiber reinforced PPS sheet prepared by the present invention has the characteristics of continuous production, high mechanical strength, good dimensional stability, and good flame retardancy. At the same time, the carbon fiber reinforced PPS sheet prepared by the present invention combines the advantages of melt sheet extrusion and hot pressing, has good thickness uniformity, and can be designed surface morphology, meets the requirements of use in multiple occasions, and has very high processing formability.

[0084] Embodiment 6:

[0085] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0086] a. Add PPS resin into a drying tank and dry it for later use; the drying temperature is 150°C and the drying time is 4 hours;

[0087] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude it from the two extruders at the same time, with an extrusion temperature of 300°C, to form two layers of PPS melt; and at the same time, unwind the carbon fiber yarn through an unwinder, so that the carbon fiber yarn is located between the two layers of PPS melt;

[0088] Each layer of the carbon fiber yarn has a thickness of 10 μm and a mesh diameter of 35 μm;

[0089] c. Hot pressing two layers of PPS melt and carbon fiber yarn, the temperature of the hot pressing roller is 80°C, and a composite sheet is obtained after hot pressing, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet; the composite sheet obtained after hot pressing is easy to solidify due to the heat conduction of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower;

[0090] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0091] The speeds of unwinding, pulling (after hot pressing) and winding were kept consistent and were all 3 m / min.

[0092] Embodiment 7:

[0093] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0094] a. Add PPS resin into a drying tank and dry it for later use; the drying temperature is 150°C and the drying time is 4 hours;

[0095] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude it from the two extruders at the same time. The extrusion temperature is 340°C to form two layers of PPS melt; and at the same time, the carbon fiber yarn is unwound through an unwinder so that the carbon fiber yarn is located between the two layers of PPS melt;

[0096] Each layer of the carbon fiber yarn has a thickness of 30 μm and a mesh diameter of 10 μm;

[0097] c. Hot-press two layers of PPS melt and carbon fiber yarn at a hot pressing roller temperature of 130°C to obtain a composite sheet, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet. The composite sheet obtained after hot pressing is easy to solidify due to the thermal conductivity of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower.

[0098] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0099] The speeds of unwinding, pulling (after hot pressing) and winding were kept consistent and were all 10 m / min.

[0100] Embodiment 8:

[0101] A continuous preparation method of carbon fiber reinforced PPS sheet, the steps are:

[0102] a. Add PPS resin into a drying tank and dry it for later use; the drying temperature is 150°C and the drying time is 4 hours;

[0103] b. Add the dried PPS resin into two extruders through a pipeline, and melt and extrude it from the two extruders at the same time. The extrusion temperature is 320°C to form two layers of PPS melt; and at the same time, the carbon fiber yarn is unwound through an unwinder so that the carbon fiber yarn is located between the two layers of PPS melt;

[0104] Each layer of the carbon fiber yarn has a thickness of 20 μm and a mesh diameter of 23 μm;

[0105] c. Hot-press two layers of PPS melt and carbon fiber yarn at a hot pressing roller temperature of 105°C to obtain a composite sheet, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet. The composite sheet obtained after hot pressing is easy to solidify due to the thermal conductivity of carbon fiber and the fast crystallization speed of PPS, and can be air-cooled by a blower.

[0106] d. The cooled and solidified composite sheet, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a traction roller, thickness measured, stored on a film rack, and defect detected. It can also be cut online;

[0107] The speeds of unwinding, pulling (after hot pressing) and winding were kept consistent and were all 6 m / min.

[0108] In the above-mentioned embodiments 6-8:

[0109] The PPS resin in step a is any one of the following products, or a mixture of two or more, with a manufacturer and model number of Toray A900, DIC PPS EC-10, DIC PPS Z-200-E5, Solvay Ryton P-4, Solvay Ryton R-4, Shinhwa PPS 3514, Shinhwa PPS3508P, Celanese Fortron 0203, Celanese Fortron 0214, Chongqing Jushi GAF01, and Chongqing Jushi GAF02;

[0110] The carbon fiber yarn described in step b can be a single layer or an overlapping double layer carbon fiber yarn;

[0111] The thickness of the prepared carbon fiber reinforced PPS sheet is between 0.08 mm and 1.5 mm.

[0112] In the above embodiments, the percentages used, unless otherwise specified, are all percentages by mass (weight) or percentages known to those skilled in the art.

[0113] In the above embodiments, the process parameters (temperature, time, speed, etc.) in each step are ranges, and any point can be applied.

[0114] The technical contents not specifically described in the present invention and the above embodiments are the same as the prior art, and the raw materials are all commercially available products.

[0115] The present invention is not limited to the above embodiments, and all the contents of the present invention can be implemented and have the above good effects.

Claims

1. A continuous preparation method of carbon fiber reinforced PPS sheet, characterized in that The following steps are involved: a. Dry the PPS resin and set it aside; b. Add the dried PPS resin into two extruders, and simultaneously melt and extrude it from the two extruders at a temperature of 300-340° C. to form two layers of PPS melt; and simultaneously unwind the carbon fiber yarn through an unwinder so that the carbon fiber yarn is located between the two layers of PPS melt; c. Hot pressing the two layers of PPS melt and the carbon fiber yarn, with the temperature of the hot pressing roller being 80-130° C. to obtain a composite sheet, which is cooled and solidified to obtain a carbon fiber reinforced PPS sheet.

2. The continuous preparation method of carbon fiber reinforced PPS sheet according to claim 1, characterized in that The following steps are involved: d. The composite sheet that has been cooled and solidified, i.e. the obtained carbon fiber reinforced PPS sheet, is rolled up after being pulled by a pulling roller, thickness measured, stored on a film rack, and defect detected; The speeds of unwinding, pulling and winding are kept consistent, and are all 3-10 m / min.

3. The method for continuously preparing the carbon fiber reinforced PPS sheet according to claim 1, characterized in that: The carbon fiber yarn described in step b is a single-layer or overlapping double-layer carbon fiber yarn.

4. The method for continuously preparing the carbon fiber reinforced PPS sheet according to claim 2, characterized in that: The carbon fiber yarn described in step b is a single-layer or overlapping double-layer carbon fiber yarn.

5. The method for continuously preparing the carbon fiber reinforced PPS sheet according to claim 1, 2, 3 or 4, characterized in that: The drying temperature in step a is 150° C. and the drying time is 4 hours.

6. The method for continuously preparing the carbon fiber reinforced PPS sheet according to claim 1, 2, 3 or 4, characterized in that: The thickness of the carbon fiber yarn in step b is 10-30 μm and the mesh diameter is 10-35 μm.

7. The method for continuously preparing a carbon fiber reinforced PPS sheet according to claim 1, 2, 3 or 4, characterized in that: The thickness of the carbon fiber reinforced PPS sheet prepared in step c is 0.08 to 1.5 mm.

8. The method for continuously preparing the carbon fiber reinforced PPS sheet according to claim 1, 2, 3 or 4, characterized in that: The PPS resin described in step a is a product manufacturer and model of A900 of Toray Industries, Ltd. of Japan, PPSEC-10 of DIC Corporation of Japan, PPS Z-200-E5 of DIC Corporation of Japan, Ryton P-4 of Solvay Group of Belgium, Ryton R-4 of Solvay Group of Belgium, PPS 3514 of Zhejiang New Ho-Cheng Co., Ltd., PPS3508P of Zhejiang New Ho-Cheng Co., Ltd., Fortron 0203 of Celanese Corporation of the United States, Fortron 0214 of Celanese Corporation of the United States, GAF01 of Chongqing Jushi New Material Technology Co., Ltd., and GAF02 of Chongqing Jushi New Material Technology Co., Ltd., or a mixture of two or more thereof.

9. The method for continuously preparing the carbon fiber reinforced PPS sheet according to claim 8, characterized in that: The melt index of the PPS resin is 50-200 g / 10 min.

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