Fabric reinforcement for manufacturing composite container member and preparation method thereof

Abstract

The invention discloses a fabric reinforcement for manufacturing a composite material container component and a preparation method thereof. The fabric reinforcement comprises a dry fiber fabric reinforcement or a prepreg fabric reinforcement; the dry fiber fabric reinforcement takes one or more of a carbon fiber woven fabric, a carbon fiber sponge, a carbon fiber fabric and a non-woven composite fabric as reinforcement base cloth, the reinforcement base cloth is taken as a central layer, and a plurality of fiber fabric layers are longitudinally bound or bonded and compounded on the upper surface and the lower surface of the reinforcement base cloth; the prepreg fabric reinforcement takes prepreg carbon fiber fabric as reinforcement base cloth, is covered with multiple layers of fabric at the upper part and the lower part, and is impregnated with a liquid resin system. According to the composite material container component manufactured through the method, the thickness of a laying layer can be accurately controlled, the volume of gaps between warp and weft fabrics and between the fabrics can be reduced, rapid curing can be achieved, energy is saved, the production efficiency is improved, the labor cost is reduced, and the purpose that a composite material container is light can be achieved through the container component.

Description

Technical Field

[0001] The invention belongs to the technical field of composite materials, and in particular relates to a fabric reinforcement for manufacturing composite material container components and a preparation method thereof. Background Art

[0002] Existing iron containers are heavy and inconvenient to carry, resulting in high transportation costs and high energy consumption. Domestic and foreign container manufacturers and related units have proposed the idea of ​​replacing steel with carbon fiber reinforced / resin-based composite materials, but there has been no significant progress so far. Summary of the invention

[0003] The purpose of the present invention is to provide a fabric reinforcement for manufacturing composite container components in view of the shortcomings of the prior art. In the various fabric reinforcements of the present invention, the central layer of the reinforcement is paved with dry fiber or prepreg carbon fiber fabric reinforcement base cloth, and all fabric layers constituting the reinforcement can adopt an "isotropic" organizational structure.

[0004] Another object of the present invention is to provide a method for preparing the above-mentioned fabric reinforcement.

[0005] The object of the present invention is achieved in the following ways:

[0006] A fabric reinforcement for manufacturing a composite container component, comprising a dry fiber fabric reinforcement or a prepreg fabric reinforcement;

[0007] The dry fiber fabric reinforcement body uses one or more of carbon fiber woven fabric, carbon fiber sponge, carbon fiber fabric and non-woven composite fabric as the reinforcement base fabric, with the reinforcement base fabric as the central layer, and multiple fiber fabric layers are longitudinally bound or bonded to the upper and lower surfaces of the reinforcement base fabric;

[0008] The prepreg fabric reinforcement is a prepreg fabric reinforcement obtained by using prepreg carbon fiber fabric as a reinforcement base cloth, covering the upper and lower parts with multiple layers of fabric, and impregnating the prepreg fabric reinforcement with a liquid resin system.

[0009] Preferably, the reinforcing base fabric is a composite reinforcing base fabric obtained by compounding high-strength carbon fiber woven fabric and recycled carbon fiber non-woven fabric; or a prepreg carbon fiber fabric composite reinforcing base fabric compounded by compounding woven fabric woven from high-strength carbon fiber continuous filaments and recycled high-temperature resistant filter material short fiber non-woven fabric after being dipped in glue.

[0010] Preferably, the prepreg fabric reinforcement is made by using a carbon fiber prepreg reinforcement base fabric as the central layer, laying one or more layers of dry fiber fabric layers on the upper and lower layers, and then simultaneously entering a liquid resin viscous tank, impregnating the resin, and then heating, pressurizing, and drying. The prepreg fabric reinforcement is a prepreg fabric reinforcement in a B-grade cured state.

[0011] The weaving method of the above-mentioned dry fiber fabric reinforcement comprises the following steps: a composite reinforcing base fabric layer of high-strength carbon fiber woven fabric and recycled carbon fiber non-woven fabric is used as a central layer, the upper and lower parts of the composite reinforcing base fabric layer are respectively bonded and covered with E-glass fiber woven fabric layers, and the outer surfaces of the E-glass fiber woven fabric layers are respectively bonded and covered with glass fiber cross cloth / polyester spunbond non-woven fabric layers.

[0012] Preferably, the composite reinforced base fabric has the following specifications: 1200dtex high-strength carbon fiber continuous filament, plain weave weaving machine woven fabric, width 2450mm, fabric warp density 6 strands / cm, weft density 6 strands / cm, mass 80g / m 2 ; Specifications of recycled carbon fiber nonwoven fabric: width 2450mm, weight 60g / m 2 ; The two carbon fiber fabrics are impregnated with adhesive solution using a multifunctional composite machine, dried, cooled, and rolled at a speed of 30-40m / min;

[0013] The E glass fiber woven fabric has the following specifications: 1200dtex E glass fiber filaments, the density of the fabric in warp and weft directions is 12 strands / cm, the fabric width is 2450mm, and the weight is 150g / m 2 ;

[0014] The fiberglass cross cloth / polyester spunbond nonwoven fabric structure specifications: the fiberglass cross cloth adopts 800dtexE glass fiber, the warp and weft density of the fabric is 14 strands / cm, the fabric width is 2450mm, and the weight is 80g / m 2 ; Polyester spunbond nonwoven fabric width 2450mm, weight 40g / m 2 The glass fiber cross cloth and polyester spunbond nonwoven fabric are impregnated with adhesive solution by a multifunctional compounding machine, dried, cooled, and rolled at a speed of 30-40m / min.

[0015] Preferably, the adhesive layer is made of a mixed emulsion of polyacrylate emulsion and thermosetting adhesive, with a mixing ratio of 100:2-5; the coating glue amount is 20-30g / m 2 , solid content 40-55%.

[0016] The weaving method of the above-mentioned prepreg fabric reinforcement includes using a dry fiber fabric layer and a composite layer to composite with a prepreg carbon fiber fabric composite reinforcement base cloth to form a prepreg fabric reinforcement sheet; wherein the prepreg carbon fiber fabric reinforcement base cloth is composited with a high-strength carbon fiber woven cloth and a recycled high-temperature resistant filter material short fiber non-woven cloth.

[0017] Preferably, the preparation of the prepreg carbon fiber fabric composite base cloth comprises the following steps:

[0018] High-strength carbon fiber woven fabric uses 1200dtex high-strength carbon fiber continuous filament, plain weave, warp density 6 strands / cm, weft density 6 strands / cm, fabric width 2450mm, weight 80g / m2; recycled high-temperature resistant filter material short fiber non-woven fabric uses waste silk generated in the production process of high-temperature resistant filter materials and recycled short fibers from failed filter bags as raw materials. The non-woven fabric has a width of 2450mm and a weight of 60g / m2. The two fabrics enter the dipping machine at the same time, are impregnated, infiltrated, pressurized and dried in the liquid resin system, and are isolated with centrifugal paper and rolled into prepreg carbon fiber fabric composite base cloth.

[0019] Preferably, the resin system: the matrix resin is a mixed resin of phenolic resin and epoxy resin, and the mixing weight ratio is 75:25; the nano-scale dicyandiamide micro-powder curing agent is added to the matrix resin, and the addition amount is 11% of the weight of the matrix resin. The resin system contains auxiliary agents, accelerators, catalysts and toughening agents. The accelerators, catalysts and toughening agents are respectively passivated imidazole, cobalt oxalate and nitrile rubber, and the addition amounts are 2.0g / l, 2.5g / l and 0.5g / l of the mass of the matrix resin, respectively. The particle size of the nano-scale dicyandiamide curing agent micro-powder is 5-7μm. The softening point of the resin system is 34±2℃, the curing temperature is 125±3℃, the curing time is 45±4min, and the storage time is>6 months. The use of nano-scale micro-powder curing agent in the resin system used in the method of the present invention can significantly reduce the curing temperature.

[0020] Preferably, the dry fiber fabric layer and the composite layer include an E-glass fiber filament woven fabric layer and a strong polyester filament woven fabric layer / polyester spunbond nonwoven fabric composite intermediate layer, wherein the E-glass fiber filament woven fabric layer uses 1200dtex E glass fiber filaments, the fabric warp and weft density is 12 strands / cm, the fabric width is 2450mm, and the mass is 80g / m 2 .

[0021] Preferably, the preparation of the high-strength polyester filament woven fabric layer / polyester spunbonded nonwoven fabric composite intermediate layer comprises the following steps: high-strength polyester filament woven fabric: using high-strength polyester filament with a fineness of 960dtex, plain weave, warp density of 12 strands / cm, weft density of 12 strands / cm, fabric width of 2450mm, weight of 85g / m 2 The width of the polyester spunbond nonwoven fabric is 2450 mm and the weight is 55 g / m2. The two fabrics are compounded on a multifunctional compounding machine to form a high-strength polyester filament woven fabric / polyester spunbond nonwoven fabric composite layer.

[0022] The reinforced base fabric or dry fiber fabric reinforcement can also be heat-set: the prefabricated carbon fiber reinforced base fabric or dry fiber fabric reinforcement is heat-set on a setting machine, so that the reinforced base fabric or dry fiber fabric reinforcement can always maintain the stability of shape and size during the preparation process and during the use of the composite material container after being made. The reinforced base fabric or fiber fabric reinforcement after heat setting is rapidly cooled and then rolled into a shaft. The heat setting speed is 20-40m / min, the heating setting temperature is 150-180℃, and the setting time is 5-10S. Preferably, the heat setting speed is 25-35m / min, the heating setting temperature is 160-165℃, and the setting time is 5-7S.

[0023] The preparation of the prepreg fabric reinforcement is carried out on a multifunctional composite machine. The multifunctional composite machine is the equipment disclosed in Patent 202311664421X.

[0024] The fabric reinforcement used in the manufacture of composite container components of the present invention has the following advantages:

[0025] (1) Selection of fiber materials

[0026] Composite container components are made of fiber and resin as the main raw materials. Fiber provides strength and rigidity in composite materials and carries most of the load. In addition to meeting various technical requirements, the fiber used should be selected with a density of <2.0g / cm 3 Lightweight fibers are selected, recycled carbon fibers or recycled high-performance fibers are selected from the perspective of green manufacturing, and continuous high-strength filaments or non-woven fabrics made of high-strength polyester chips are selected from the perspective of low cost.

[0027] (2) Preparation of reinforced base fabric and fabric layer

[0028] Containers in a static or moving state are subjected to various forces from the external environment, such as tension, compression, distortion, and extrusion. Through the force analysis of the main body or load-bearing components and general components of traditional steel containers, the absolute value difference of the force in the vertical direction (warp) and the horizontal direction (weft) does not exceed 10%-20%. Based on this, all components of composite container will adopt the "isotropic" force principle, the vertical interweaving structure of warp and weft fibers, the sponge three-dimensional structure and the non-woven methods such as sewing or spunbonding to prepare carbon fiber fabric prepreg or dry fiber reinforced base cloth and other materials single-layer fabrics, and use the above fabrics to make double-layer fabric layer intermediates, such as carbon fiber filament / carbon fiber non-woven fabric composite base cloth, glass fiber filament fabric / polyester non-woven fabric intermediate, glass fiber filament fabric / recycled carbon fiber non-woven fabric layer intermediate, etc.

[0029] a) Preparation of reinforced base fabric

[0030] Carbon fiber fabric single layer or composite reinforced base fabric is used to manufacture composite container box materials, such as the center layer of wider plates such as side wall panels and top panels, or the center layer of narrower plates such as upper and lower beams and columns. As the reinforcing base fabric of prefabricated parts, it can be in two forms, one is made into prepreg sheet, the other is made into dry fiber fabric layer sheet.

[0031] B) Fabric layer and multi-layer fabric layer preparation

[0032] Fabric layer: The fabric layer can be a single fiber fabric layer or a mixed fiber fabric layer. The fabric weaving method can be woven, warp knitted, weft knitted, or non-woven fabric layer. The fabric can adopt the following specifications:

[0033]

[0034]

[0035] Multi-layer fabric layer: a composite layer of a single fiber fabric layer with multiple fibers or different weaving methods, which can be two or more multi-layer fabric layers, such as: a carbon fiber fabric / glass fiber fabric composite layer, a composite layer of carbon fiber and other high-performance fiber fabric layers, a composite layer of glass fiber and polyester non-woven fabric layers, a composite layer of glass fiber / polyester woven fabric layers, a carbon fiber fabric layer / polyester woven fabric layer, and the like.

[0036] (3) Preparation of dry fiber fabric reinforcement

[0037] The load of the composite container body is transferred to the reinforcement through the matrix, and the fabric layer that constitutes the reinforcement, especially the reinforcement base fabric layer, bears the main load. The dry fiber fabric reinforcement is composed of a prepreg reinforcement base fabric composited with carbon fiber sponge, carbon fiber woven fabric or carbon fiber filament woven fabric and carbon fiber non-woven fabric, or carbon fiber continuous filament woven fabric, or a reinforcement base fabric composited with carbon fiber non-woven fabric and a fiber fabric or multi-layer fiber fabric layer covered above and below it with glass fiber and other fiber blends. The number of fabric layers above and below the reinforcement base fabric is centered on the base fabric, and the type and number of fabrics on both sides are the same, so the total number of composite layers is an odd number of layers, and the type and number of fabric layers are determined according to the technical requirements of different types of composite containers.

[0038] The width of the dry fiber fabric reinforcement used to prepare the container roof, side wall panels, front and rear door boxes, and front box panels is consistent with the width of the above-mentioned large main parts, which is 2150-2450mm; the width of the dry fiber fabric reinforcement used to prepare the upper and lower beams and columns is narrower, which is 120-300mm, that is, the circumference of the cross section of the above beams and columns. It can also be cut from a wide reinforcement.

[0039] Dry fiber fabric reinforcement width 120-2450mm, thickness 1.0-1.8mm, weight 400-600g / m 2 , tensile strength 700-1450MPa.

[0040] The preparation of dry fiber fabric reinforcement is carried out on a multifunctional composite machine. The reinforcement base fabric and composite fabric layer are placed on each unwinding rack in turn, and the fabric is fed in at the same time, completing the composite process in one go. Figure 1 The schematic diagram of the multifunctional compound machine is shown in Figure 2 shown.

[0041] (4) Preparation of resin system

[0042] The present invention uses nano-scale curing agent powder, such as modified aliphatic, dicyandiamide and other amine curing agents, to modify and strengthen the resin system. Preferably, dicyandiamide and other amine curing agents are used. The particle size of the dicyandiamide curing agent powder is less than 15 μm, and the particle diameter of the powder is preferably 5-10 μm.

[0043] Resin system additives

[0044] Accelerator: Urea or imidazole compounds can be selected, such as passivated imidazole, imidazolylmethyl-α-phenol, etc. Urea compounds are preferred, and the addition amount is 1.5-5g / l.

[0045] Catalyst: cobalt oxalate, cobalt stearate, chromium naphthenate, etc. can be selected, preferably cobalt oxalate, and the addition amount is 1.2-4.2g / l.

[0046] Toughening agent: such as nitrile rubber, the addition amount is 0.2-0.7g / l.

[0047] Resin system ratio: based on 100% of the base resin, the added curing agent nano-dicyandiamide accounts for 11% of the weight of the base resin.

[0048] (5) Preparation of prepreg carbon fiber fabric reinforced base fabric and fabric reinforcement

[0049] a) Preparation of prepreg carbon fiber fabric reinforced base fabric

[0050] The carbon fiber sponge, carbon fiber filament woven base cloth, or the composite reinforced base cloth that has been pre-bonded with carbon fiber woven cloth and carbon fiber non-woven cloth by adhesive is put into the dipping machine, impregnated and infiltrated with the resin system solution, and then extruded by a rolling mill, pre-cured, cooled, and centrifugal paper isolated to make a prepreg carbon fiber sponge or carbon fiber fabric reinforced base cloth sheet. The prepreg reinforced base cloth shaft in the B-level curing state is rolled up for standby use.

[0051] b) Preparation of prepreg fabric reinforcement

[0052] After removing the isolation paper from the prefabricated prepreg carbon fiber sponge or prepreg carbon fiber reinforced base cloth, or the carbon fiber sponge or dry fiber carbon fiber fabric base cloth that has been shaped, or the composite reinforced base cloth and the fabric layer or composite woven fabric layer laid on the upper and lower layers of the base cloth, enter the melt dipping machine at the same time, impregnate, penetrate, and centrifuge paper isolation to form a precured fabric reinforcement; or the dry fiber fabric reinforcement containing the dry fiber fabric reinforced base cloth directly enters the dipping machine, impregnates, penetrates to form a precured fabric reinforcement sheet, and rolls it up for standby use.

[0053] The number of plies of reinforcement and the type of ply fabric material are determined according to the technical requirements of composite material containers of different models and types.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] 1. According to the force analysis of the container in operation or at rest, the present invention adopts an "isotropic" fabric structure, such as using high-strength carbon fiber to prepare the reinforced base fabric of the composite container, which can avoid and reduce the difficulty of laying layers; by increasing the total tightness of the fabric and improving the fiber volume coefficient of the reinforcement, the purpose of making the composite container lightweight is achieved.

[0056] 2. The present invention manufactures composite container components, which can improve production efficiency, reduce labor costs, accurately control layer thickness, reduce the gap capacity between the warp and weft of the fabric and between the fabrics, and is conducive to long-term storage of the fabric reinforcement at room temperature.

[0057] 3. The present invention particularly uses a nano-scale dispersed curing agent, which can improve the mechanical properties of the prepreg carbon fiber fabric reinforced base fabric and the prepreg reinforcement, and can reduce the curing temperature of the prepreg fabric reinforcement by 10-15°C when preparing container components compared with the existing conventional curing temperature, that is, it can be quickly cured at a lower temperature, saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 Schematic diagram of the structure of the dry fiber fabric reinforcement of the embodiment.

[0059] In the figure, 1 is a composite reinforcing base fabric layer, 2 is a first adhesive layer, 3 is a second adhesive layer, 4 is a first E-glass fiber woven fabric layer, 5 is a second E-glass fiber woven fabric layer, 6 is a third adhesive layer, 7 is a fourth adhesive layer, 8 is a first glass fiber cross cloth / polyester spunbond nonwoven fabric layer, and 9 is a second glass fiber cross cloth / polyester spunbond nonwoven fabric layer.

[0060] Figure 2 It is a schematic structural diagram of the multifunctional compound machine used in the embodiment.

[0061] In the figure, 10 is the first unwinding shaft, 11 is the second unwinding shaft, 12 is the third unwinding shaft, 13 is the fourth unwinding shaft, 14 is the fifth unwinding shaft, 15 is the first mucus tank, 16 is the first liquid feeding roller, 17 is the second liquid feeding roller, 18 is the second mucus tank, 19 is the third liquid feeding roller, 20 is the fourth liquid feeding roller, 21 is the third mucus tank, 22 is the fourth mucus tank, 23 is the first liquid feeding roller, 24 is the second liquid feeding roller, 25 is the first foam baffle, 26 is the second foam baffle, 27 is the third foam baffle, 28 is the fourth foam baffle, 29 first movable foam baffle, 30 second movable foam baffle, 31 third movable foam baffle, 32 fourth movable foam baffle, 33 mucus storage tank, 34 foam generator, 35 heating box, 36 first heating roller, 37 second heating roller, 38 third heating roller, 39 fourth heating roller, 40 fourth heating roller, 41 cooling device, 42 first two-roller rolling mill, 43 second two-roller rolling mill, 44 third two-roller rolling mill, 45 fourth two-roller rolling mill, 46 finished product cloth rolling roller. DETAILED DESCRIPTION

[0062] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0063] The multifunctional compound machine used in the embodiment is the device disclosed in the embodiment of patent 202311664421X.

[0064] Example 1: Dry Fiber Fabric Reinforcement

[0065] The dry fiber fabric reinforcement of this embodiment adopts the automatic placement technology, and the high-strength carbon fiber woven fabric and recycled carbon fiber non-woven fabric composite reinforcement base fabric is the central layer, and the upper and lower composite reinforcement base fabric layers are respectively bonded and covered with E glass fiber woven fabric layers, and the outer surfaces of the E glass fiber woven fabric layers are respectively bonded and covered with glass fiber cross cloth / polyester spunbond non-woven fabric layers. The polyester spunbond non-woven fabric is on the outermost surface of the dry fiber fabric reinforcement, so that the fabric reinforcement has a smoother surface.

[0066] The specific preparation steps are as follows:

[0067] 1. Fabric specifications and preparation of composite reinforced base fabric layer

[0068] Fabric specifications of composite reinforced base fabric layer: 1200dtex high-strength carbon fiber continuous filament, plain weave woven fabric, width 2450mm, fabric warp density 6 strands / cm, weft density 6 strands / cm, weight 80g / m 2 , Recycled carbon fiber nonwoven fabric specifications: width 2450mm, weight 60g / m2 .

[0069] The two carbon fiber fabrics are placed on the unwinding racks of the first unwinding shaft 10 and the second unwinding shaft 11 of the multifunctional composite machine, unwind, pass through the first mucus tank 15 to be impregnated with the adhesive solution, pass through the second two-roller rolling mill 43 and the third two-roller rolling mill 44 to enter the heating box 35 for drying, and are cooled by the cooling device 41. The obtained composite reinforced base fabric is rolled on the finished product roll roller 46 for standby use. The speed of the multifunctional composite machine is 30m / min.

[0070] The composite reinforced base fabric is heat-set on a setting machine, with a heat-setting speed of 25-35 m / min, a heating setting temperature of 160-165° C., and a setting time of 5-7 seconds.

[0071] 2. E glass fiber woven fabric layer specifications

[0072] E glass fiber woven fabric layer specifications: 1200dtex E glass fiber filaments, warp and weft density of the fabric are 12 strands / cm, fabric width 2450mm, weight 150g / m 2 .

[0073] 3. Glass fiber cross cloth / polyester spunbond nonwoven fabric specifications and preparation

[0074] Glass fiber cross cloth / polyester spunbond nonwoven fabric layer organization specifications: Glass fiber cross cloth uses 800dtexE glass fiber, the warp and weft density of the fabric is 14 strands / cm, the fabric width is 2450mm, and the weight is 80g / m 2 . Spunbond nonwoven fabric layer width 2450mm, weight 40g / m 2 The glass fiber cross cloth / polyester spunbond nonwoven fabric layer composite process refers to the reinforced composite base fabric production process described in step 1.

[0075] 4. Adhesive formula and process

[0076] Adhesive layer formula and process: polyacrylate emulsion and thermosetting adhesive mixed emulsion, mixing ratio 100:2. Coating glue amount 20g / m 2 , solid content 50%.

[0077] 5. Preparation of dry fiber fabric reinforcement

[0078] The preparation of dry fiber fabric reinforcement is carried out on a multifunctional composite machine, and the specific method is as follows:

[0079] The prefabricated large roll of composite reinforced base fabric is placed on the unwinding frame of the third unwinding shaft 12, unwound, and enters the first two-roller mill 42. The E glass fiber woven fabric weaving shaft is placed on the unwinding frame of the first unwinding shaft 10 and the second unwinding shaft 11 respectively. The outer glass fiber cross cloth / polyester spunbond nonwoven fabric layer large roll shaft is placed on the unwinding frame of the fourth unwinding shaft 13 and the fifth unwinding shaft 14 respectively. The E glass fiber woven fabric layer passes through the first adhesive mucus tank 15 and the third liquid feeding roller 19 respectively, is impregnated with resin liquid, and after coming out of the mucus tank, it is covered on the upper and lower sides of the composite reinforced base fabric at the first two-roller mill 42 respectively. After compounding, it is passed through The second two-roller mill 43 extrude the outermost layer of the glass fiber cross cloth / polyester spunbond nonwoven fabric large package, which is impregnated with adhesive liquid in the third mucus tank 21 and the fourth mucus tank 22, and covered with the outer surface of the glass fiber fabric at the third two-roller mill 44 after exiting the adhesive liquid tank. The formed dry fiber fabric reinforcement enters the heating box 35, is heated by the first heating roller 36, the second heating roller 37, the third heating roller 38, the fourth heating roller 39, and the fifth heating roller 40, exits the oven, is compacted by the fourth two-roller mill 45, passes through the cooling device 41, and is finally rolled up on the finished cloth rolling roller 46.

[0080] Technical data of dry fiber fabric reinforcement: width 2450mm, thickness 1.6mm, mass 640g / m 2 The tensile strength is 1250MPa, the tensile stiffness is 90GPa, the compressive stiffness is 86GPa, and the bending stiffness is 86GPa.

[0081] Example 2 Prepreg fabric reinforcement

[0082] The prepreg fabric reinforcement sheet is prepared by compounding a dry fiber fabric layer and a composite layer with a prepreg carbon fiber fabric composite reinforcement base cloth.

[0083] The specific preparation method is as follows:

[0084] 1. Preparation of prepreg carbon fiber fabric composite reinforced base fabric:

[0085] The composite reinforced base fabric is made of a woven fabric made of high-strength carbon fiber continuous filaments and a recycled high-temperature resistant filter material short fiber non-woven fabric. The high-strength carbon fiber woven fabric uses 1200dtex high-strength carbon fiber continuous filaments, plain weave, warp density 6 strands / cm, weft density 6 strands / cm, fabric width 2450mm, weight 80g / m 2 Regenerated high temperature resistant filter material short fiber nonwoven fabric is made of waste silk generated in the production process of high temperature resistant filter material and recycled short fiber from failed filter bags as raw materials. Width 2450mm, weight 60g / m 2 .

[0086] The two fabrics enter the dipping machine at the same time, are impregnated, penetrated, pressurized and dried in the liquid resin system; they are isolated with centrifugal paper and rolled into prepreg carbon fiber fabric composite reinforced base cloth. The speed of the dipping machine is 15-25m / min.

[0087] Specifications of reinforced base fabric: width 2450mm, sheet thickness 0.6-1.0mm, mass 180g / m 2 .

[0088] 2. Preparation of dry fiber fabric layer and composite layer

[0089] a) E-glass fiber filament woven fabric layer: 1200dtex E glass fiber filament, fabric warp and weft density 12 strands / cm, fabric width 2450mm, weight 80g / m 2 .

[0090] b) High-strength polyester filament woven fabric layer / polyester spunbond nonwoven fabric composite middle layer: High-strength polyester filament woven fabric layer: Made of 960dtex high-strength polyester filament, plain weave, warp density 12 strands / cm, weft density 12 strands / cm, fabric width 2450mm, weight 85g / m 2 . Polyester spunbond nonwoven fabric layer width 2450mm, weight 55g / m 2 The two fabrics are compounded on a multifunctional compounding machine to form a high-strength polyester filament woven fabric / polyester spunbonded nonwoven fabric composite middle layer.

[0091] 3. Preparation of adhesive and resin system

[0092] The adhesive formulation and process are the same as in Example 1.

[0093] Resin system: The base resin is a mixed resin of phenolic resin and epoxy resin, and the mixing weight ratio is 75:25; nano-grade dicyandiamide micropowder curing agent is added to the base resin, and the added amount is 11% of the base resin weight. The resin system contains auxiliary agents, accelerators, catalysts and toughening agents. The accelerators, catalysts and toughening agents are passivated imidazole, cobalt oxalate and nitrile rubber, respectively, and the added amounts are 2.0g / l, 2.5g / l and 0.5g / l of the base resin mass, respectively. The particle size of the nano-grade dicyandiamide curing agent micropowder is 5-7μm.

[0094] The softening point of the resin system is 34±2℃, the curing temperature is 125±3℃, the curing time is 45±4min, and the storage time is >6 months.

[0095] 4. Preparation of prepreg fabric reinforcement

[0096] The preparation of prepreg fabric reinforcement is carried out on a multifunctional composite machine. The specific method is as follows:

[0097] The large roll of prepreg carbon fiber fabric reinforced composite base cloth is placed on the unwinding frame of the third unwinding shaft 12, the centrifugal paper is removed, and the roll is unwound. After being impregnated with the resin system solution through the first mucus tank 15, the E glass fiber woven shaft is placed on the unwinding racks of the first unwinding shaft 10 and the second unwinding shaft 11 respectively, and the outer high-strength polyester filament woven fabric / polyester spunbond non-woven fabric composite layer large rolls are placed on the unwinding racks of the fourth unwinding shaft 13 and the fifth unwinding shaft 14 respectively, and the E glass fiber woven fabric layer passes through the first mucus tank 15 of the liquid resin system and the third liquid feeding roller 19 respectively, and is impregnated with the resin liquid. After exiting the resin liquid tank, it is respectively covered on the upper and lower sides of the composite reinforced base fabric with the centrifugal paper removed at the first two-roller mill 42, and after compounding, it is pressurized by the second two-roller mill 43, and the outermost high-strength polyester filament woven fabric layer / polyester spunbond non-woven fabric layer large roll is impregnated with the resin liquid in the third mucus tank 21 and the fourth mucus tank 22, and after exiting the resin liquid tank, it is respectively covered on the outer surface of the glass fiber fabric layer at the third two-roller mill 44. The formed prepreg fabric reinforcement enters the heating box 35, is heated by the first heating roller 36, the second heating roller 37, the third heating roller 38, the fourth heating roller 39, and the fifth heating roller 40, exits the oven, enters the cooling device 41, and is finally rolled up by the finished product winding roller 46.

[0098] When preparing the prepreg fabric reinforcement, the multifunctional composite machine has a speed of 20 m / min, and the fabric is impregnated with the resin system for 6 seconds each time.

[0099] Prepreg fabric reinforcement product data:

[0100] Fiber volume fraction 67%, width 2450mm, mass 793.4g / m 2 , thickness 20mm, density 1.82g / m 3 , tensile strength 2745.3MPa, compressive strength 2670.33MPa, torsional strength 2590.7MPa, and compressive stiffness 83.3GPa.

Claims

1. A fabric reinforcement for manufacturing composite container components, characterized in that including dry fiber fabric reinforcement or prepreg fabric reinforcement; The dry fiber fabric reinforcement body uses one or more of carbon fiber woven fabric, carbon fiber sponge, carbon fiber fabric and non-woven composite fabric as the reinforcement base fabric, with the reinforcement base fabric as the central layer, and multiple fiber fabric layers are longitudinally bound or bonded to the upper and lower surfaces of the reinforcement base fabric; The prepreg fabric reinforcement is a prepreg fabric reinforcement obtained by using prepreg carbon fiber fabric as a reinforcement base cloth, covering the upper and lower parts with multiple layers of fabric, and impregnating the prepreg fabric reinforcement with a liquid resin system.

2. The fabric reinforcement for manufacturing composite container components according to claim 1, characterized in that The reinforcing base fabric is a composite reinforcing base fabric obtained by compounding high-strength carbon fiber woven fabric and recycled carbon fiber nonwoven fabric; or a prepreg carbon fiber fabric composite reinforcing base fabric compounded by compounding high-strength carbon fiber continuous filament woven fabric and recycled high-temperature resistant filter material short fiber nonwoven fabric impregnated with resin.

3. The fabric reinforcement for manufacturing composite container components according to claim 1, characterized in that The prepreg fabric reinforcement is made by taking the carbon fiber prepreg reinforcement base cloth as the central layer, laying one or more layers of dry fiber fabric layers on the upper and lower parts, and then simultaneously entering the liquid resin mucus tank, impregnating the resin, and then heating, pressurizing and drying.

4. A method for weaving a dry fiber fabric reinforcement according to claim 1, characterized in that The method comprises the following steps: a composite reinforcement base fabric layer of high-strength carbon fiber woven fabric and recycled carbon fiber nonwoven fabric is used as a central layer, an E-glass fiber woven fabric layer is bonded and covered on the upper and lower parts of the composite reinforcement base fabric layer, and a glass fiber cross fabric / polyester spunbond nonwoven fabric layer is bonded and covered on the outer surface of the E-glass fiber woven fabric layer; The composite reinforced base fabric structure specifications are: 1200dtex high-strength carbon fiber continuous filament, plain weave weaving machine woven fabric, width 2450mm, fabric warp density 6 strands / cm, weft density 6 strands / cm, weight 80g / m 2 ; Specifications of recycled carbon fiber nonwoven fabric: width 2450mm, weight 60g / m 2 ; The two carbon fiber fabrics are impregnated with adhesive solution using a multifunctional composite machine, dried, cooled, and rolled at a speed of 30-40m / min; The E glass fiber woven fabric has the following specifications: 1200dtex E glass fiber filaments, the density of the fabric in warp and weft directions is 12 strands / cm, the fabric width is 2450mm, and the weight is 150g / m 2 ; The fiberglass cross cloth / polyester spunbond nonwoven fabric structure specifications: the fiberglass cross cloth adopts 800dtexE glass fiber, the warp and weft density of the fabric is 14 strands / cm, the fabric width is 2450mm, and the mass is 80g / m 2 ; Polyester spunbond nonwoven fabric width 2450mm, weight 40g / m 2 The glass fiber cross cloth and polyester spunbond nonwoven fabric are impregnated with adhesive solution by a multifunctional compounding machine, dried, cooled, and rolled at a speed of 30-40m / min.

5. The fabric reinforcement for manufacturing composite container components according to claim 4, characterized in that The adhesive layer is made of a mixed emulsion of polyacrylate emulsion and thermosetting adhesive, with a mixing ratio of 100:2-5; the coating glue amount is 20-30g / m 2 , solid content 40-55%.

6. A method for weaving a prepreg fabric reinforcement according to claim 1, characterized in that The method comprises the steps of using a dry fiber fabric layer and a composite layer to composite with a prepreg carbon fiber fabric composite reinforcing base fabric to form a prepreg fabric reinforcement sheet; wherein the prepreg carbon fiber fabric reinforcing base fabric is composited with a high-strength carbon fiber woven fabric and a recycled high-temperature resistant filter material short fiber nonwoven fabric.

7. The method for weaving a prepreg fabric reinforcement according to claim 6, characterized in that The preparation of the prepreg carbon fiber fabric composite base cloth comprises the following steps: High-strength carbon fiber woven fabric uses 1200dtex high-strength carbon fiber continuous filament, plain weave, warp density 6 strands / cm, weft density 6 strands / cm, fabric width 2450mm, weight 80g / m 2 ; Recycled high temperature resistant filter material short fiber nonwoven fabric is made of waste silk and regenerated short fibers from failed filter bags produced during the production process of high temperature resistant filter materials; width 2450mm, weight 60g / m 2 The two fabrics enter the impregnation machine at the same time, are impregnated, infiltrated, pressurized and dried in the liquid resin system; they are isolated with centrifugal paper and rolled into prepreg carbon fiber fabric composite base cloth.

8. The method for weaving a prepreg fabric reinforcement according to claim 7, characterized in that The matrix resin in the resin system is a mixed resin of phenolic resin and epoxy resin, and the mixing weight ratio is 75:25; a nano-scale dicyandiamide micropowder curing agent is added to the matrix resin, and the added amount is 11% of the weight of the matrix resin, and the particle size of the nano-scale dicyandiamide curing agent micropowder is 5-7μm; the resin system contains an accelerator, a catalyst and a toughening agent, which are passivated imidazole, cobalt oxalate and nitrile rubber, respectively, and the added amounts are 2.0g / l, 2.5g / l and 0.5g / l of the mass of the matrix resin, respectively.

9. The method for weaving a prepreg fabric reinforcement according to claim 6, characterized in that The dry fiber fabric layer and the composite layer include an E-glass fiber filament woven fabric layer and a strong polyester filament woven fabric layer / polyester spunbond nonwoven fabric composite intermediate layer, wherein the E-glass fiber filament woven fabric layer uses 1200dtex E glass fiber filaments, the fabric warp and weft density is 12 strands / cm, the fabric width is 2450mm, and the mass is 80g / m 2 .

10. The method for weaving a prepreg fabric reinforcement according to claim 9, characterized in that The preparation of the high-strength polyester filament woven fabric layer / polyester spunbonded nonwoven fabric composite intermediate layer comprises the following steps: high-strength polyester filament woven fabric: using high-strength polyester filament with a fineness of 960dtex, plain weave, warp density of 12 strands / cm, weft density of 12 strands / cm, fabric width of 2450mm, weight of 85g / m 2 ; Polyester spunbond nonwoven fabric width 2450mm, weight 55g / m 2 The two fabrics are compounded on a multifunctional compounding machine to form a high-strength polyester filament woven fabric / polyester spunbond nonwoven fabric composite layer.

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