A basalt fiber modifier, a basalt fiber polypropylene composite material, a preparation method and application thereof

Abstract

The application belongs to the technical field of basalt fiber basalt fiber modifier, and particularly relates to a basalt fiber modifier, a basalt fiber polypropylene composite material and a preparation method and application thereof. The basalt fiber modifier is mainly composed of the following raw materials in percentage by weight: 0.1-1% of silane coupling agent, 2-15% of unsaturated polyester, 0.05-0.2% of glacial acetic acid, 80-95% of deionized water, 0.1-1% of antistatic agent and 0-5% of auxiliary agent. The above-mentioned proportioning can improve the interfacial bonding performance of the fiber as the reinforcing material and the polypropylene plastic as the matrix material. The traditional glass fiber polypropylene composite material has poor mechanical performance, poor acid and alkali resistance and poor weather resistance, and is difficult to meet the market demand for high-performance polypropylene composite material. The basalt fiber polypropylene composite material provided by the application can greatly improve the mechanical performance of the traditional polypropylene composite material by using the basalt fiber reinforced polypropylene composite material, so as to meet the market demand. The above-mentioned material can also be used for the preparation of furniture.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of basalt fiber modifiers, and particularly relates to a basalt fiber modifier, a basalt fiber polypropylene composite material, and a preparation method and application thereof. BACKGROUND

[0002] Polypropylene is a kind of conventional general-purpose plastic with semi-crystalline type and excellent comprehensive performance, but its mechanical strength is low in practical application, the dimensional stability after molding is general, and the shrinkage is large, which limits its application in some fields. The blending method of filling fillers can be usually used to improve it. Common fillers include talc, calcium carbonate, barium sulfate, montmorillonite, glass fiber, carbon fiber, etc., among which, the fiber type filler has higher strength and thermal stability than the powder type mineral powder in the composite material. The traditional glass fiber reinforced polypropylene composite material has the defects of low strength, poor weather resistance, and easy corrosion; and the carbon fiber has less application in the field of reinforced polypropylene composite material due to high cost.

[0003] At present, the interface bonding performance of the fiber reinforced material and the polypropylene base material directly affects the performance and quality of the final product, so a basalt fiber modifier is developed according to the characteristics of the reinforced material and the base material, so as to improve the interface bonding performance of the reinforced material and the base material.

[0004] In view of the above technical problems, the present application is proposed. SUMMARY

[0005] The first object of the present application is to provide a basalt fiber modifier, so as to improve the interface bonding performance of the fiber as the reinforced material and the polypropylene plastic as the base material.

[0006] The second object of the present application is to provide a basalt fiber polypropylene composite material. The basalt fiber polypropylene composite material obtained after the special basalt fiber modifier treatment has excellent strength, corrosion resistance, aging resistance and electrical insulation performance, low price, high production efficiency, and can be widely applied in the fields of automobiles, furniture, electronic information and new energy.

[0007] The third object of the present application is to provide a preparation method of a basalt fiber polypropylene composite material. The material prepared by the specific conditions has excellent strength, corrosion resistance, aging resistance and electrical insulation performance, and can be widely applied in the fields of automobiles, furniture, electronic information and new energy.

[0008] The fourth object of the present application is to provide an application of the basalt fiber polypropylene composite material in the preparation of furniture.

[0009] The present application is realized by the following technical solutions:

[0010] In a first aspect, the present application provides a basalt fiber modifier, which is mainly composed of the following raw materials in percentage by weight: 0.1% to 1% of silane coupling agent, 2% to 15% of unsaturated polyester, 0.05% to 0.2% of glacial acetic acid, 80% to 95% of deionized water, 0.1% to 1% of antistatic agent, and 0% to 5% of auxiliary agent.

[0011] Further, in a preferred embodiment of the present application, the silane coupling agent includes one or more of γ-aminopropyl triethoxysilane, γ-(2, 3) epoxy (propoxy) propyl trimethoxysilane, γ-methacryloyloxy propyl trimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane.

[0012] Further, in a preferred embodiment of the present application, the unsaturated polyester is a bisphenol A type unsaturated polyester.

[0013] Further, in a preferred embodiment of the present application, the antistatic agent includes an anionic or cationic antistatic agent.

[0014] In a second aspect, the present application provides a basalt fiber polypropylene composite material, which is mainly composed of the following raw materials in percentage by weight: 10% to 30% of basalt fiber and 70% to 95% of polypropylene resin.

[0015] The basalt fiber includes a coating layer attached to the surface of the basalt fiber, and the coating layer is formed by the basalt fiber modifier.

[0016] In a third aspect, the present application provides a preparation method of a basalt fiber polypropylene composite material, which mainly includes the following steps:

[0017] The basalt is heated and melted, and then drawn at a high speed through a platinum-rhodium alloy bushing to obtain a drawn body;

[0018] The basalt fiber modifier is coated on the surface of the drawn body, and then dried to obtain basalt fiber with a diameter of 3 to 17 μm and a length of 2 to 10 mm;

[0019] The basalt fiber and the polypropylene are blended, heated and melted, and then cooled to obtain the basalt fiber polypropylene composite material.

[0020] Further, in a preferred embodiment of the present application, the heating temperature of the basalt is 1300 to 1500 degrees Celsius.

[0021] Further, in a preferred embodiment of the present application, the aperture of the platinum-rhodium alloy bushing is 1 mm to 3 mm, and the rotating speed of the drawing machine is 2000 to 7000 revolutions per minute.

[0022] Further, in the preferred embodiment of the present application, the basalt fiber modifier accounts for 0.1-1% of the total weight of the basalt fiber.

[0023] In a fourth aspect, the present application provides a basalt fiber polypropylene composite material for preparing furniture.

[0024] Compared with the prior art, the present application has at least the following technical effects:

[0025] The first object of the present application is to provide a basalt fiber modifier, the interface bonding performance of basalt fiber as reinforcing material and polypropylene as matrix material directly affects the performance and quality of the final product; the present application is prepared according to the characteristics of basalt fiber and polypropylene material, and a special basalt fiber modifier is prepared, which can effectively improve the interface bonding performance of basalt fiber and polypropylene matrix

[0026] The second object of the present application is to provide a basalt fiber polypropylene composite material, basalt fiber is a new type of high performance inorganic fiber material, which has good stability, good electrical insulation, corrosion resistance, combustion resistance, high temperature resistance and excellent comprehensive performance, low raw material cost, natural environmental protection, high cost performance, and the basalt fiber polypropylene composite material synthesized by the special basalt fiber modifier and plastic not only has excellent strength, corrosion resistance, aging resistance and electrical insulation performance, but also has low price and high production efficiency, and can be widely applied to the fields of automobile, furniture, electronic information and new energy.

[0027] The third object of the present application is to provide a preparation method of a basalt fiber polypropylene composite material, the material prepared by the specific conditions has excellent strength, corrosion resistance, aging resistance and electrical insulation performance, and can be widely applied to the fields of automobile, furniture, electronic information and new energy.

[0028] The fourth object of the present application is to provide a basalt fiber polypropylene composite material for preparing furniture, because the composite material has the characteristics of low density, light weight, non-toxic and odorless, good chemical resistance, long service life, excellent mechanical properties and the like, which can not only improve the strength of furniture and prolong the service life, but also is safe and environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figures 1-3 The figures are respectively the microscopic structure diagrams of different magnifications of the embodiment 1 of the present application. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below with reference to the examples, but those skilled in the art will understand that the following examples are only for illustration of the present application and should not be regarded as limiting the scope of the present application, the specific conditions not noted in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturer, and the reagents or instruments not noted by the manufacturer are all conventional products that can be purchased on the market.

[0031] The technical solutions of the embodiments of the present application are:

[0032] The present application provides a basalt fiber modifier, which is mainly composed of the following raw materials in percentage by weight: silane coupling agent 0.1% to 1%, unsaturated polyester 2% to 15%, glacial acetic acid 0.05% to 0.2%, deionized water 80% to 95%, antistatic agent 0.1% to 1%, and auxiliary agent 0% to 5%.

[0033] The interfacial bonding performance of basalt fiber as a reinforcing material and polypropylene as a matrix material directly affects the performance and quality of the final product; the present scheme is directed to the characteristics of basalt fiber and polypropylene material, and a special basalt fiber modifier is prepared, which can effectively improve the interfacial bonding performance of basalt fiber and polypropylene matrix.

[0034] Further, the silane coupling agent includes one or more of γ-aminopropyl triethoxysilane, γ-(2,3) epoxy (propoxy) propyl trimethoxysilane, γ-methacryloxypropyl trimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane.

[0035] Among them, the silane coupling agent contains a large number of silane groups which can be effectively combined with basalt fiber, and the molecular structure at one end of the silane coupling agent is strong in design and can be adjusted to improve the bonding ability with the film forming agent and the polypropylene matrix.

[0036] Preferably, the silane coupling agent includes a mixture of two or more of γ-aminopropyl triethoxysilane, γ-(2,3) epoxy (propoxy) propyl trimethoxysilane, γ-methacryloxypropyl trimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane.

[0037] Among them, a single silane coupling agent cannot achieve better results, in order to prepare a silane coupling agent polypropylene composite material with better performance, the above two silane coupling agents are mixed.

[0038] Further preferably, the silane coupling agent is a mixture of γ-aminopropyl triethoxysilane and γ-methacryloxypropyl trimethoxysilane.

[0039] The silane coupling agent mixture of the two components can effectively improve the interface performance between the basalt fiber and the polypropylene matrix and improve the mechanical properties of the composite material.

[0040] Further, the unsaturated polyester is a bisphenol A type unsaturated polyester.

[0041] Further preferably, the unsaturated polyester is a bisphenol A type (TH920) or bisphenol A type (TH950) unsaturated polyester. A large number of experiments show that the mechanical properties of the product prepared by using the above two types of bisphenol A are better.

[0042] The silane coupling agent is a "bridge" connecting the basalt fiber and the polypropylene matrix, and the special basalt fiber modifier is configured by selecting a special silane coupling agent and an unsaturated polyester, so that the interface bonding performance between the basalt fiber and the polypropylene resin matrix is improved.

[0043] Further, the antistatic agent includes an anionic or cationic antistatic agent.

[0044] Further, the auxiliary agent includes a defoaming agent and / or a lubricant.

[0045] Further, the preparation method of the basalt fiber modifier mainly includes the following steps:

[0046] (1) The ice acetic acid and deionized water are selected according to the weight ratio to adjust the PH to 3.5-4, and the silane coupling agent is slowly added and stirred until the liquid surface is clear without oil flowers;

[0047] (2) The unsaturated polyester and deionized water are selected according to the weight ratio to be dissolved and stirred uniformly to obtain an unsaturated polyester solution;

[0048] (3) The antistatic agent and deionized water are selected according to the weight ratio to be dissolved and stirred uniformly to obtain an antistatic agent solution;

[0049] (4) The auxiliary agent and deionized water are selected according to the weight ratio to be dissolved and stirred uniformly to obtain an auxiliary agent solution;

[0050] (5) The mixture obtained in the above steps (1)-(4) is stirred uniformly, and the remaining deionized water is stirred uniformly to obtain the basalt fiber modifier.

[0051] The order of steps (1) to (4) can be replaced in front and back, as long as each raw material is dissolved uniformly in water in advance to obtain its aqueous solution, and finally all the aqueous solutions of the raw materials are mixed uniformly to obtain the basalt fiber modifier.

[0052] The present application provides a basalt fiber polypropylene composite material, which is mainly composed of the following raw materials in weight percentage: basalt fiber 10%-30% and polypropylene resin 70%-95%;

[0053] The basalt fiber includes a coating layer attached to the surface of the basalt fiber, and the coating layer is formed by the basalt fiber modifier.

[0054] The conventional glass fiber polypropylene composite material has poor mechanical properties, poor acid and alkali resistance and poor weather resistance, and is difficult to meet the market demand for high-performance polypropylene composite materials. The basalt fiber reinforced polypropylene composite material can greatly improve the mechanical properties of the conventional polypropylene composite material and meet the market demand.

[0055] In the polypropylene, the basalt fiber reinforcing material is added. With the increase of the basalt fiber, the mechanical properties of the composite material increase. When the content of the basalt fiber exceeds 30%, the strength increases slowly, the solubility decreases, and the injection molding process of the composite material is affected, and the shaped product is easy to deform.

[0056] Further, the preparation method of the basalt fiber polypropylene composite material mainly includes the following steps:

[0057] The basalt is heated and melted at 1300-1500℃, and then high-speed drawn through a platinum-rhodium alloy sieve plate with a pore size of 1mm-3mm. The rotation speed of the drawing machine is 2000-7000r / min. The drawn body is coated with a basalt fiber modifier as a coating layer, and then dried to obtain a basalt fiber with a diameter of 3-17μm and a length of 2-10mm, which contains the basalt fiber modifier as a coating layer.

[0058] Further, the basalt fiber modifier accounts for 0.1-1% of the total weight of the basalt fiber.

[0059] The basalt fiber and the polypropylene are blended to obtain basalt fiber modified polypropylene particles.

[0060] The blending modification process includes continuous fiber blending modification and short fiber blending modification. In this scheme, basalt short fibers are used as raw materials, and the side feeding method is used to blend with the polypropylene melt to obtain basalt fiber polypropylene composite material. The length of the basalt fiber is 2-10mm. The feeding method of the blending modification process is added on the side of the blending modification equipment, so that the basalt fiber in the composite material is uniformly dispersed. If the fiber is too long, it will be difficult to add to the blending equipment, and it will be difficult to mix uniformly after adding. If the fiber length is too short, the retention length of the fiber in the composite material after blending will be too low, resulting in loss of reinforcement and reduction of the strength of the composite material.

[0061] The basalt fiber modified polypropylene particles are extruded to form a basalt fiber polypropylene composite material.

[0062] Since thermoplastic can be repeatedly processed by melting through heating, the basalt fiber reinforced thermoplastic part can be repaired by heating to save time and cost.

[0063] The application provides application of a basalt fiber polypropylene composite material in preparation of furniture; traditional furniture is mainly of steel-wood structure (wooden board and metal frame), and the wooden structure has the defects of deformation due to damp, easy burning, easy corrosion, not resistant to bacteria and easy mildew. Compared with a wooden office chair armrest, the basalt fiber reinforced polypropylene composite material furniture not only has strong bearing capacity, but also will not deform due to damp. In the production aspect, the basalt fiber reinforced polypropylene composite material furniture is also easier to produce, does not need secondary processing, and does not need surface treatment such as corrosion prevention or paint spraying. Modern furniture is mainly simple, and the basalt fiber reinforced polypropylene composite material furniture just meets the current popular modern style.

[0064] The specific embodiments of the application are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the application, and are not used to limit the application.

[0065] The silane coupling agent in the examples and comparative examples of the application is selected from Nanjing Pinning Coupling Agent Co., Ltd., and the model is KH550\KH560\KH570, KH602;

[0066] The unsaturated polyester is selected from Tianhe Resin Co., Ltd., and the model is TH920\TH950;

[0067] The glacial acetic acid is selected from Merck, and the glacial acetic acid is analytical pure.

[0068] Example 1

[0069] The example provides a basalt fiber modifier, which is mainly composed of the following raw materials in weight percentage:

[0070] The silane coupling agent is 0.4%, the unsaturated polyester is 5%, the glacial acetic acid is 0.08%, the deionized water is 93.92%, the antistatic agent is 0.1%, and the auxiliary agent is 0.5%. The specific components and the specific added amount are shown in Table 1.

[0071] The example provides a preparation method of a basalt fiber modifier,

[0072] 1. Hydrolysis:

[0073] 1) Take a clean empty bucket, add 50g of water, weigh 0.8g of glacial acetic acid into a beaker, and start stirring (40r / min) to stir uniformly;

[0074] 2) Weigh 4g of silane coupling agent, slowly pour it into the above beaker, and continue to stir for 30 minutes until the liquid surface is clear without oil spots;

[0075] Dilution:

[0076] 1) Weigh 50 g of unsaturated polyester, dilute with 100 g of warm water, stir evenly, pour into a preparation beaker and stir evenly;

[0077] 2) Weigh 1 g of antistatic agent, dilute with 20 g of warm water, stir evenly, pour into a preparation beaker and stir evenly;

[0078] 3) Weigh 5 additives, dilute with 50 g of warm water, stir evenly, pour into a preparation beaker and stir evenly;

[0079] 2. Configuration:

[0080] 1) All raw materials used must be stirred evenly before preparation, and phenomena such as sedimentation and caking must not occur;

[0081] 2) Add water to 1000 g, stir evenly and wait for use.

[0082] The embodiment provides a preparation method of basalt fiber polypropylene composite material,

[0083] Step 1, select 15 kg of natural basalt ore, heat and melt at 1350 DEG C, and then high-speed draw through a platinum-rhodium alloy sieve plate with a pore size of 1 mm to 3 mm, the rotating speed of the drawing machine is 4000 r / min, to obtain a drawn body, the drawn body is coated on the surface of an oil-coated roller containing a basalt fiber modifier to obtain a basalt fiber containing a coating body, and after drying, a continuous basalt fiber with a diameter of 13 μm is obtained; wherein the basalt fiber modifier accounts for 0.6% of the total weight of the basalt fiber.

[0084] Step 2, the continuous basalt fiber prepared is processed into 9 mm ± 1 mm chopped basalt fiber by a radial cutter disc pressure roller type fiber cutting machine.

[0085] Step 3, blending modification, 3 kg of chopped basalt fiber prepared in step 2 is added to 7 kg of polypropylene, heated and melted, and then cut into 3 mm ± 1 mm basalt fiber modified polypropylene particles after water cooling.

[0086] Step 4, the basalt fiber modified polypropylene particles prepared above are added to an injection molding machine, and processed into basalt fiber reinforced polypropylene composite material 1 through an injection molding process.

[0087] The mechanical properties of the basalt fiber reinforced polypropylene composite material are shown in Table 2.

[0088] Example 2

[0089] The embodiment provides a basalt fiber modifier which is mainly composed of the following raw materials in percentage by weight: 0.2% of a silane coupling agent, 14% of an unsaturated polyester, 0.1% of glacial acetic acid, 85.45% of deionized water, 0.15% of an antistatic agent and 0.1% of an auxiliary agent; the specific components and the specific added amounts are shown in Table 1.

[0090] The preparation method of the basalt fiber modifier is shown in Embodiment 1.

[0091] The embodiment provides a preparation method of a basalt fiber polypropylene composite material,

[0092] Step 1: 15 kg of natural basalt ore is heated and melted at 1400 DEG C, and then high-speed wire drawing is performed through a platinum-rhodium alloy bushing with a pore size of 1 mm-3 mm, the rotating speed of a wire drawing machine is 7000 r / min, a wire drawing body is prepared, the wire drawing body is coated on the surface of an oil coating roller containing a basalt fiber modifier to obtain a basalt fiber containing a coating body, and after drying, continuous basalt fibers with a diameter of 3 μm are obtained; wherein the basalt fiber modifier accounts for 0.9% of the total weight of the basalt fibers.

[0093] Step 2: the prepared continuous basalt fibers are processed into 3 mm±1 mm chopped basalt fibers through a radial cutter disc pressure roller type fiber cutting machine.

[0094] Step 3: blending and modification, 2 kg of the chopped basalt fibers prepared in step 2 are added into 8 kg of polypropylene, heating and melting blending is performed, and after water cooling, 3 mm±1 mm basalt fiber modified polypropylene particles are cut.

[0095] Step 4: the basalt fiber modified polypropylene particles prepared above are added into an injection molding machine, and are processed into basalt fiber reinforced polypropylene composite material 2 through an injection molding process.

[0096] It is detected that the mechanical properties of the basalt fiber reinforced polypropylene composite material are shown in Table 2.

[0097] Embodiment 3

[0098] The embodiment provides a basalt fiber modifier which is mainly composed of the following raw materials in percentage by weight: 0.2% of a silane coupling agent, 14% of an unsaturated polyester, 0.1% of glacial acetic acid, 85.45% of deionized water, 0.15% of an antistatic agent and 0.1% of an auxiliary agent; the specific components and the specific added amounts are shown in Table 1.

[0099] The preparation method of the basalt fiber modifier is shown in Embodiment 1.

[0100] The embodiment provides a preparation method of a basalt fiber polypropylene composite material,

[0101] Step 1, select 15 kg of natural basalt ore, heat and melt at 1340℃, then high speed wire drawing through a platinum-rhodium alloy sieve plate with a pore size of 1mm-3mm, the wire drawing machine rotates at 2000r / min, to obtain a wire drawing body, the wire drawing body is coated on the surface of the oil-coated rolling table containing basalt fiber modifier to obtain a basalt fiber containing coating body, and after drying, a continuous basalt fiber with a diameter of 17μm is obtained; wherein the basalt fiber modifier accounts for 0.2% of the total weight of the basalt fiber.

[0102] Step 2, the continuous basalt fiber prepared is processed into 5mm±1mm chopped basalt fiber by a radial cutter disc pressure roller type fiber cutting machine.

[0103] Step 3, blending modification, 1.5kg of chopped basalt fiber prepared in step 2 is added to 8.5kg of polypropylene, heated and melted for blending, and after water cooling, it is cut into 3mm±1mm basalt fiber modified polypropylene particles.

[0104] Step 4, the basalt fiber modified polypropylene particles prepared above are added to an injection molding machine, and processed into basalt fiber reinforced polypropylene composite material 3 by injection molding process.

[0105] The mechanical properties of the basalt fiber reinforced polypropylene composite material are shown in Table 2.

[0106] Table 1

[0107]

[0108]

[0109] Comparative Example 1

[0110] This example provides a basalt fiber polypropylene composite material, which is different from Example 1 only in that KH550 is used to replace an equal amount of silane coupling agent; the properties of the basalt fiber polypropylene composite material prepared according to the method of Example 1 are shown in Table 2.

[0111] Comparative Example 2

[0112] This example provides a basalt fiber polypropylene composite material, which is different from Example 1 only in that water-based polycarbonate type polyurethane is used to replace an equal amount of unsaturated polyester. The properties of the basalt fiber polypropylene composite material prepared according to the method of Example 1 are shown in Table 2.

[0113] Comparative Example 3

[0114] This example provides a basalt fiber polypropylene composite material, which is different from Example 1 only in that epoxy resin film-forming agent is used to replace an equal amount of unsaturated polyester. The properties of the basalt fiber polypropylene composite material prepared according to the method of Example 1 are shown in Table 2.

[0115] Comparative Example 4

[0116] This example provides a glass fiber polypropylene composite material, which is only different from Example 1 in that in the preparation of the material, the chopped basalt fiber is replaced by ordinary 13 μm glass fiber, and other materials remain unchanged, and the glass fiber polypropylene composite material is prepared, and the performance is shown in Table 2.

[0117] In order to illustrate that the basalt fiber modified polypropylene material provided in the present application has better mechanical property effect, the materials prepared in Examples 1-3 and Comparative Examples 1-4 are subjected to the following experiments:

[0118] The results are shown in Table 2.

[0119] Table 2 Mechanical properties of polypropylene composite materials

[0120]

[0121]

[0122] Table 2

[0123]

[0124] From Table 2, it can be shown that,

[0125] Example 1 and Comparative Example 1 are compared, under the premise of the same fiber diameter and content, by changing the coupling agent, the flexural strength and tensile strength of the basalt fiber reinforced polypropylene composite material are increased from 62.1 Mpa and 39.6 Mpa to 94.1 Mpa and 63.7 Mpa, respectively. It can be known from the analysis of the cross-sectional morphology that the mixed use of KH550 and KH570 is beneficial to improving the interface performance of basalt fiber and polypropylene composite material matrix, and improving the mechanical properties of the composite material.

[0126] Example 2 and Comparative Example 2 are compared, under the premise of the same fiber diameter and content, by changing the film forming agent, the flexural strength and tensile strength of the basalt fiber reinforced polypropylene composite material are increased from 73.1 Mpa and 49.4 Mpa to 80.4 Mpa and 56.7 Mpa, respectively. At the same time, the use of unsaturated polyester film forming agent can make the basalt fiber disperse more uniformly in the polypropylene matrix, and the mechanical properties of the composite material are obviously improved.

[0127] Compared with Comparative Example 4, basalt fiber has excellent mechanical properties (tensile strength can reach 4800 MPa, much higher than E glass fiber), so under the premise of the same fiber diameter and content, the flexural strength and tensile strength of basalt fiber reinforced polypropylene composite are greatly improved from 45.4 Mpa and 30.6 Mpa to 94.1 Mpa and 63.7 Mpa respectively compared with glass fiber reinforced polypropylene composite. Such mechanical strength can be comparable with ABS and reinforced ABS products, which improves the mechanical properties of traditional fiber reinforced polypropylene composite and its products, and expands the application field of fiber reinforced polypropylene composite.

[0128] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A basalt fiber modifier characterized in that, The basalt fiber modifier is mainly composed of the following raw materials in percentage by weight: silane coupling agent 0.1%-1%, unsaturated polyester 2%-15%, glacial acetic acid 0.05%-0.2%, deionized water 80%-95%, antistatic agent 0.1%-1%, and auxiliary agent 0%-5%; the unsaturated polyester is a bisphenol A type unsaturated polyester; the antistatic agent includes an anionic or cationic antistatic agent; and the silane coupling agent includes at least two of γ-aminopropyl triethoxysilane, γ-(2,3) epoxy (propoxy) propyl trimethoxysilane, γ-methacryloyloxypropyl trimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane.

2. A basalt fiber polypropylene composite, characterized by, The basalt fiber modifier is mainly composed of the following raw materials in percentage by weight: silane coupling agent 0.1%-1%, unsaturated polyester 2%-15%, glacial acetic acid 0.05%-0.2%, deionized water 80%-95%, antistatic agent 0.1%-1%, and auxiliary agent 0%-5%; the unsaturated polyester is a bisphenol A type unsaturated polyester; the antistatic agent includes an anionic or cationic antistatic agent; and the silane coupling agent includes at least two of γ-aminopropyl triethoxysilane, γ-(2,3) epoxy (propoxy) propyl trimethoxysilane, γ-methacryloyloxypropyl trimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyl methyl dimethoxysilane. The basalt fiber includes a coating layer attached to the surface of the basalt fiber, and the coating layer is formed by the basalt fiber modifier of claim 1.

3. A process for the production of the basalt fiber polypropylene composite of claim 2, characterized in that, The method mainly includes the following steps: The basalt is heated and melted, and then drawn at high speed through a platinum-rhodium alloy bushing to obtain a drawn body; The basalt fiber modifier is coated on the surface of the drawn body, and then dried to obtain basalt fibers with a diameter of 3-17 μm and a length of 2-10 mm; The basalt fibers and polypropylene are blended, heated, and melted, and then cooled to obtain a basalt fiber polypropylene composite material.

4. The method of claim 3, wherein the basalt fiber reinforced polypropylene composite is prepared by the steps of: a) mixing the basalt fibers and the polypropylene resin; b) extruding the mixture of step a) to form a basalt fiber reinforced polypropylene composite; and c) cooling the basalt fiber reinforced polypropylene composite. The heating temperature of the basalt is 1300-1500 degrees Celsius.

5. The method of claim 3, wherein the basalt fiber reinforced polypropylene composite is prepared by the steps of: a) mixing the basalt fibers and the polypropylene resin; b) extruding the mixture of step a) to form a basalt fiber reinforced polypropylene composite; and c) cooling the basalt fiber reinforced polypropylene composite. The platinum-rhodium alloy bushing has a pore size of 1-3 mm, and the rotating speed of the drawing machine is 2000-7000 revolutions per minute.

6. The method of claim 3, wherein the basalt fiber reinforced polypropylene composite is prepared by the steps of: a) mixing the basalt fibers and the polypropylene resin; b) extruding the mixture of step a) to form a basalt fiber reinforced polypropylene composite; and c) cooling the basalt fiber reinforced polypropylene composite. The basalt fiber modifier accounts for 0.1-1% of the total weight of the basalt fibers.

7. Use of the basalt fiber polypropylene composite material of claim 2 in the preparation of furniture.

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