Method and device for preparing supporting heat insulation block

Abstract

The invention relates to a preparation method and a preparation device of a supporting heat insulation block. Firstly, epoxy resin, an amine epoxy resin curing agent, a flame retardant and a filler are put into a glue mixing machine to be uniformly mixed, and a glue material is obtained; impregnating glass fiber cloth in the sizing material through an impregnator, so that the surface of the glass fiber cloth is fully coated with the sizing material; fully dipping the glass fiber cloth by using a dipping roller press, cutting the dipped glass fiber cloth, paving and stacking the glass fiber cloth in a molding press, and heating, curing and molding; and finally demolding to obtain a composite material supporting heat insulation block product. The process is simple in steps and easy to implement, and meanwhile, the prepared composite material supporting heat insulation block product has excellent heat insulation performance, low density and good mechanical property.

Description

Technical Field

[0001] The present invention relates to the technical field of epoxy resin composite material preparation, specifically to a method for preparing a supporting insulation block and a preparation device thereof, and more particularly to a method for making a low-density epoxy composite material supporting insulation block and a preparation device thereof. Background Art

[0002] In recent years, with the accelerated adjustment of the world's energy supply and demand pattern, the demand for liquefied energy transportation and storage has also increased dramatically, and the scale of transport ships represented by LNG ships has also been expanding. At present, laminated wood is generally used as the supporting insulation module in the liquid cargo tanks of LNG ships.

[0003] Laminated wood has excellent thermal insulation properties, and has advantages such as a low linear expansion coefficient and a low density. At present, there is a method for making dense laminated wood support blocks on the market (for example, patent document CN114857486A), which uses European maple, beech or birch wood, cuts the trunk flat or peels it to obtain thin boards; after the thin boards are treated, they are impregnated (soaked or coated) with synthetic resins and stacked, and the wooden boards can be impregnated with phenolic resins; then the stacked thin boards are compressed at a high temperature of 100 to 300°C to obtain dense laminated wood support blocks with good performance. However, the mechanical properties of laminated wood are poor, which leads to problems such as cracking during use. In addition, laminated wood is also prone to corruption and deterioration due to the influence of temperature and humidity during long-term use.

[0004] Traditional epoxy resin-based composite materials have excellent mechanical properties and corrosion resistance, but their high thermal conductivity and density limit their use as liquid cargo tank insulation modules. The applicant has studied the use of epoxy resin-based composite materials to prepare pressure blocks. The previously applied patent document CN117777671A discloses the application of an epoxy resin composite material in a cryogenic liquid tank support block. The epoxy resin composite material is used to form a cryogenic liquid tank support block by vacuum infusion in one step, and the application temperature is -196 to -60°C; the epoxy resin composite material includes the following components by mass: 100 parts of epoxy resin, 30 to 90 parts of liquid anhydride curing agent, 0 to 30 parts of toughening agent, 0.4 to 1 part of amine accelerator, 0.5 to 2 parts of defoaming agent, and 200 to 450 parts of fiber reinforcement material; the liquid anhydride curing agent is one or two of methyl nadic anhydride, methyl hexahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, tung oil anhydride, and citraconic anhydride. However, the epoxy resin composite material of the document has a high density and thermal conductivity, resulting in its high weight and poor thermal insulation performance, which limits its use as a liquid cargo tank insulation module and other fields that require high thermal insulation performance.

[0005] Therefore, there is an urgent need in the market for a method for preparing a low-density epoxy composite supporting insulation block. Summary of the invention

[0006] The object of the present invention is to provide an improved method for preparing a supporting insulation block and a preparation device thereof. Through the improvement of process and structure, the prepared supporting insulation block has good insulation performance, strong mechanical properties, and corrosion resistance. At the same time, the production process is simple, which is convenient for producing products of different specifications.

[0007] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is: a method for preparing a supporting insulation block, characterized in that: the preparation method comprises the following steps: S1: putting 100 parts of epoxy resin, 20-50 parts of amine epoxy resin curing agent, 10-80 parts of flame retardant and 10-20 parts of filler into a glue mixer and mixing them evenly to obtain a glue; S2: impregnating 100-200 parts of glass fiber cloth into the glue through a glue dipping machine, so that the surface of the glass fiber cloth is fully coated with the glue; S3: fully impregnating the glass fiber cloth through an impregnation roller press, cutting the impregnated glass fiber cloth, paving and stacking it in a molding machine, pre-pressing it once every 5-10 layers, and heating and curing it into shape; S4: demolding to obtain a composite material supporting insulation block product.

[0008] Preferably, in step S1, the epoxy resin is a bisphenol A epoxy resin with an epoxy equivalent of 220 to 240 g / eq, a viscosity of 700 to 900 mPas, and a density of 1.0 to 1.2 g / cc; the amine epoxy resin curing agent is at least one of aliphatic amines, aromatic amines, and alicyclic amines, with an amine value of 10 to 13 meq / g, a viscosity of 10 to 50 mPas, and a density of 0.9 to 1.0 g / cc; the filler is one or more of fly ash, glass microspheres, and hollow microspheres; and the flame retardant is an organic phosphorus flame retardant with a phosphorus content ≥20%.

[0009] Further, in step S2, the glass fiber cloth is a biaxial glass fiber cloth with a surface density of 400 to 1200 g / m 2 , direction is 0 / 90, and the rubber temperature is controlled at 20-30℃.

[0010] Furthermore, in step S3, the roller gap of the impregnation roller press is controlled to be 0.4-1.2 mm and the line speed is controlled to be 10-80 mm / s, so that the adhesive solution fully impregnates the glass fiber cloth.

[0011] Further, in step S3, the mold pressure is 5 to 20 MPa, the pre-pressing pressure is 5 to 10 MPa, the curing temperature is 50 to 150° C., and the curing time is 120 to 480 min.

[0012] A preparation device in a method for preparing a supporting insulation block, characterized in that: the preparation device includes a glue mixer, the inlet end of the glue mixer is connected to a glue injection machine, the outlet end is connected to a glue dipping machine, a cloth placing rack matched with the glue dipping machine is provided above the glue dipping machine, a crawler machine for conveying glass fiber cloth is provided on one side of the glue dipping machine, a dipping roller press is provided between the crawler machine and the glue dipping machine, an automatic cloth cutting machine matched with the crawler machine is provided above the crawler machine, the automatic cloth cutting machine is used to cut the glass fiber cloth, and a molding machine is provided on one side of the crawler machine.

[0013] Preferably, the glue injection machine includes a first storage tank and a second storage tank, the bottoms of the first and second storage tanks are connected at a mixing valve through a pipeline, and the mixing valve is connected to the glue mixer through a first glue injection port; the first storage tank is used to store epoxy resin, and the second storage tank is used to store epoxy resin curing agent.

[0014] Furthermore, the glue mixer includes a third material storage tank and a fourth material storage tank. The third and fourth material storage tanks are connected to the mixing tank through pipelines, and the mixing tank is connected to the glue dipping machine through the second glue injection port.

[0015] Furthermore, the dipping machine comprises a dipping tank, in which a transmission wheel is arranged, and the surface of the glass fiber cloth is coated with the glue liquid through the rotation of the transmission wheel.

[0016] Compared with the prior art, the technical solution of the present invention not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects:

[0017] 1. The improved scheme of the present invention is to first immerse the glass fiber cloth in the prepared glue solution, and then obtain the supporting insulation block by cutting, laminating and molding. The above process steps are simple and efficient, and the finished product is of high quality. The obtained supporting insulation block has the advantages of good insulation performance, strong mechanical properties and corrosion resistance;

[0018] 2. In the technical solution of the present invention, 100 parts of epoxy resin, 20 to 50 parts of amine epoxy resin curing agent, 10 to 80 parts of flame retardant and 10 to 20 parts of filler are put into a rubber mixer and mixed evenly to obtain a rubber material. The rubber material obtained by the above ratio makes the prepared supporting insulation block have a lower density, higher compression strength, bending strength and impact strength;

[0019] 3. In the structure of the present invention, the preparation device includes a glue mixer, the inlet end of the glue mixer is connected to the glue injection machine, the outlet end is connected to the glue dipping machine, a cloth placing rack matched with the glue dipping machine is provided above the glue dipping machine, a crawler machine for conveying glass fiber cloth is provided on one side of the glue dipping machine, a dipping roller press is provided between the crawler machine and the glue dipping machine, an automatic cloth cutting machine matched with the crawler machine is provided above the crawler machine, the automatic cloth cutting machine is used to cut the glass fiber cloth, and a molding machine is provided on one side of the crawler machine; the preparation device has a reasonable structure layout and high production efficiency, and can mass-produce various supporting insulation blocks of different specifications, and the manufactured supporting insulation blocks are of good quality and long service life;

[0020] 4. The process method of the present invention is simple and easy to operate, with low processing and production costs and is easy to implement. At the same time, the device structure of the present invention is reasonably matched, which reduces production costs and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a preparation device according to an embodiment of the present invention.

[0022] Figure 2 This is a photo of a supporting insulation block according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 1. Fabric rack; 2. Glue injection machine; 3. Glue mixer; 4. Glue impregnation machine; 5. Impregnation roller press; 6. Automatic fabric cutting machine; 7. Track machine; 8. Molding machine;

[0025] 21. First material storage tank; 22. Second material storage tank; 23. Mixing valve; 24. First glue injection port;

[0026] 31. The third material storage tank; 32. The fourth material storage tank; 33. The mixing tank; 34. The second glue injection port;

[0027] 41. Glue dipping tank; 42. Transmission wheel. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The invention provides a method for preparing a supporting insulation block, which comprises the following steps: S1: putting 100 parts of epoxy resin, 20-50 parts of amine epoxy resin curing agent, 10-80 parts of flame retardant and 10-20 parts of filler into a glue mixer and mixing them evenly to obtain a sizing material; S2: impregnating 100-200 parts of glass fiber cloth into the sizing material through a glue impregnation machine, so that the surface of the glass fiber cloth is fully coated with the sizing material; S3: fully impregnating the glass fiber cloth through an impregnation roller press, cutting the impregnated glass fiber cloth, paving and stacking it in a molding machine, and heating and curing it into shape; S4: demoulding to obtain a composite material supporting insulation block product.

[0030] When used, the composite material support insulation block product prepared according to the above process steps has excellent insulation performance, low density and good mechanical properties. Specifically, the thermal conductivity of the support insulation block is 0.1-0.5 W / mK, and the density is 1.0-1.8 g / cm 3 , length 200~2000mm, width 200~1000mm, height 4~600mm. At the same time, the process method has reasonable steps, and the products are of high precision and good quality, which can meet the needs of different production specifications.

[0031] Example 1

[0032] In this embodiment, the preparation method of the supporting insulation block includes the following steps: S1: putting 100 parts of epoxy resin, 20-50 parts of amine epoxy resin curing agent, 10-80 parts of flame retardant and 10-20 parts of filler into a glue mixer and mixing them evenly to obtain a glue; S2: impregnating 100-200 parts of glass fiber cloth into the glue through a dipping machine, so that the surface of the glass fiber cloth is fully coated with the glue; S3: fully impregnating the glass fiber cloth through an impregnation roller press, and after cutting, the impregnated glass fiber cloth is laid and stacked in a molding machine, and heated and cured to form; S4: demolding to obtain a composite material supporting insulation block product.

[0033] Further, in step S1, the epoxy resin is a bisphenol A epoxy resin with an epoxy equivalent of 220 to 240 g / eq, a viscosity of 700 to 900 mPas, and a density of 1.0 to 1.2 g / cc; the amine epoxy resin curing agent is at least one of aliphatic amines, aromatic amines, and alicyclic amines, with an amine value of 10 to 13 meq / g, a viscosity of 10 to 50 mPas, and a density of 0.9 to 1.0 g / cc; the filler is one or more of fly ash, glass microspheres, and hollow microspheres, preferably with a density of 0.2 to 0.8 g / cm 3 The flame retardant is an organic phosphorus flame retardant with a phosphorus content of ≥20%.

[0034] In step S2, the glass fiber cloth is a biaxial glass fiber cloth with a surface density of 400 to 1200 g / m2 , direction is 0 / 90, and the rubber temperature is controlled at 25℃.

[0035] In step S3, the roller gap of the impregnation roller press is controlled to be 0.4-1.2 mm and the line speed is controlled to be 10-80 mm / s, so that the adhesive liquid fully impregnates the glass fiber cloth. During the paving process, pre-pressing is performed once every 5-10 layers, the pre-pressing pressure is 5-10 MPa, the mold pressure is 5-20 MPa, the curing temperature is 50-150°C, and the curing time is 120-480 min.

[0036] The preparation device of this embodiment includes a glue mixer 3, the inlet end of the glue mixer is connected to the glue injection machine 2, and the outlet end is connected to the glue dipping machine 4. A cloth placing rack 1 is provided above the glue dipping machine 4 to match it. A crawler machine 7 for conveying glass fiber cloth is provided on one side of the glue dipping machine 4. An impregnation roller press 5 is provided between the crawler machine and the glue dipping machine. An automatic cloth cutting machine 6 is provided above the crawler machine 7 to match it. The automatic cloth cutting machine is used to cut the glass fiber cloth. A molding machine 8 is provided on one side of the crawler machine.

[0037] Specifically, the glue injection machine 2 includes a first storage tank 21 and a second storage tank 22. The bottoms of the first and second storage tanks are connected at a mixing valve 23 through a pipeline, and the mixing valve is connected to the glue mixer through a first glue injection port 24; the first storage tank is used to store epoxy resin, and the second storage tank is used to store epoxy resin curing agent.

[0038] The glue mixer 3 includes a third material storage tank 31 and a fourth material storage tank 32. The third and fourth material storage tanks are connected to the mixing tank 33 through a pipeline. The mixing tank 33 is connected to the glue dipping machine 4 through a second glue injection port 34. The glue dipping machine 4 includes a glue dipping tank 41 and a constant temperature system. A transmission wheel 42 is provided in the glue dipping tank. The surface of the glass fiber cloth is coated with glue liquid by rotating the transmission wheel. The constant temperature system can control the temperature of the glue in the glue dipping tank, thereby controlling the viscosity of the glue and the amount of glue dipping.

[0039] Example 2

[0040] In this embodiment, the preparation method of the supporting insulation block includes the following steps: S1: putting epoxy resin, amine epoxy resin curing agent, flame retardant and filler into a glue mixer and mixing them evenly to obtain glue; S2: impregnating glass fiber cloth into the glue by a glue dipping machine so that the surface of the glass fiber cloth is fully coated with the glue; S3: fully impregnating the glass fiber cloth by an impregnation roller press, cutting the impregnated glass fiber cloth, laying and stacking it in a molding machine, pre-pressing it, and then heating and curing it into shape; S4: demolding to obtain a composite material supporting insulation block product.

[0041] In steps S1 and S2, 100 parts of bisphenol A epoxy resin (Daosheng Tianhe, TECHSTORM180, viscosity 1250 mPa·s), 30 parts of amine epoxy resin curing agent (Daosheng Tianhe, TECHSTORM185, viscosity 5-25 mPa·s), and filler (glass microspheres, density 0.3 g / cm 3 , Zhongke Huaxing, C30) 50 parts, organic phosphorus flame retardant (Daoer Chemical, 6206) 17 parts, glass fiber cloth (Changzhou Hongfa, E-DB-800, biaxial glass fiber cloth, surface density: 800g / m 2 , direction: 0 / 90) 130 copies.

[0042] The thermal conductivity of the low-density epoxy composite material supporting insulation block prepared according to the above process is 0.1-0.5 W / mK, and the density is 1.0-1.8 g / cm 3 , length 200~2000mm, width 200~1000mm, height 4~600mm.

[0043] Compared with the prior art, the composite material support insulation module and the preparation process described in the present invention have the following advantages:

[0044] 1. The prepared composite material support insulation module has excellent insulation performance, low density and good mechanical properties, and has broad application prospects;

[0045] 2. The preparation process is simple and efficient, easy to implement large-scale production, and can prepare products of different sizes and specifications according to product requirements.

[0046] Example 3

[0047] In this embodiment, the preparation method of the supporting insulation block includes the following steps:

[0048] S1: According to the size and weight of the low-density epoxy composite material supporting insulation block, calculate the number of layers of glass fiber cloth required for laying and the mass fraction of each component required for the glue, and prepare a molding die that meets the size requirements; put epoxy resin, amine epoxy resin curing agent, flame retardant and filler into a glue mixer and mix them evenly to obtain a glue;

[0049] S2: dipping the glass fiber cloth into the adhesive through a dipping machine, so that the surface of the glass fiber cloth is fully coated with the adhesive;

[0050] S3: The glass fiber cloth is fully impregnated by an impregnation roller press, and the impregnated glass fiber cloth is cut, laid, and stacked in a molding press, and heated and cured to form after pre-pressing;

[0051] S4: demoulding to obtain a composite material supporting insulation block product.

[0052] Specifically, the composition of the rubber material by mass is as follows: 100 parts of bisphenol A epoxy resin (Huibai New Materials, LTC-6010A, epoxy equivalent 0.58-0.63eq / 100g, viscosity 750-1250mPa·s), 30 parts of amine epoxy resin curing agent (Huibai New Materials, LTC-6010B, amine value 500-600mgKOH / g, viscosity 6-12mPa·s), filler (glass beads, density 0.3g / cm 3 , Zhongke Huaxing, C30) 45 parts, organic phosphorus flame retardant (Daoer Chemical, 6206) 20 parts. Glass fiber cloth (Changzhou Hongfa, E-DB-800, biaxial glass fiber cloth, surface density: 800g / m 2 , direction: 0 / 90) 200 copies.

[0053] S2, impregnating the glass fiber cloth in the rubber compound, controlling the rubber compound temperature to 25°C, the roller gap of the impregnation roller press to 0.6mm, and the roller linear speed to 50mm / s, so that both sides of the glass fiber cloth are fully impregnated with the rubber compound;

[0054] S3, rolling and cutting the impregnated glass fiber cloth, laying and stacking it in a molding machine, pre-pressing it once every 10 layers, with a pre-pressing pressure of 5 MPa, a mold size of 500×200×100 mm, heating and curing it, with a mold pressure of 8 MPa, a curing temperature of 100°C, and a curing time of 360 min;

[0055] S4, demoulding, to obtain a low-density epoxy composite material support insulation block, the thermal conductivity of the support insulation block is 0.151W / mK, the density is 1.41g / cm 3 , length 500mm, width 200mm, height 100mm.

[0056] Example 4

[0057] In this embodiment, the preparation method of the supporting insulation block includes the following steps:

[0058] S1: According to the size and weight of the low-density epoxy composite material supporting insulation block, calculate the number of layers of glass fiber cloth required for laying and the mass fraction of each component required for the glue, and prepare a molding die that meets the size requirements; put epoxy resin, amine epoxy resin curing agent, flame retardant and filler into a glue mixer and mix them evenly to obtain a glue;

[0059] S2: impregnating the glass fiber cloth in the adhesive by a dipping machine, so that the surface of the glass fiber cloth is fully coated with the adhesive, wherein the adhesive temperature is controlled to be 27° C., the roller gap of the dipping roller press is 0.5 mm, and the roller linear speed is 50 mm / s, so that both sides of the glass fiber cloth are fully impregnated with the adhesive;

[0060] S3: The glass fiber cloth is fully impregnated by an impregnation roller press, and the impregnated glass fiber cloth is cut, laid, and stacked in a molding machine, and heated and cured to form, wherein pre-pressing is performed once every 10 layers, the pre-pressing pressure is 5 MPa, the mold size of the molding machine is 500×100×50 mm, and the heating and curing are performed, the mold pressure is 5 MPa, the curing temperature is 100° C., and the curing time is 300 min;

[0061] S4: demoulding to obtain a composite material support insulation block product, the thermal conductivity of the support insulation block is 0.171 W / mK, and the density is 1.62 g / cm 3 , length 500mm, width 100mm, height 50mm.

[0062] Specifically, the composition of the rubber material by mass is as follows: 100 parts of bisphenol A epoxy resin (Huibai New Materials, LTC-6010A, epoxy equivalent 0.58-0.63eq / 100g, viscosity 750-1250mPa·s), 30 parts of amine epoxy resin curing agent (Huibai New Materials, LTC-6010B, amine value 500-600mgKOH / g, viscosity 6-12mPa·s), filler (hollow microspheres (density 0.5g / cm 3 , Shanghai Huijing, HG120) 50 parts, organic phosphorus flame retardant (Daoer New Materials, 8303) 10 parts. Glass fiber cloth (Taishan Glass Fiber E-BX800, biaxial glass fiber cloth, surface density: 800g / m 2 , direction: 0 / 90) 200 copies.

[0063] Example 5

[0064] The low-density epoxy composite material supporting insulation block of this embodiment is prepared by the following steps:

[0065] S1, according to the size and weight of the low-density epoxy composite material supporting insulation block, calculate the number of layers of glass fiber cloth required for laying and the mass fractions of each component required for the glue, and prepare a molding die that meets the size requirements; mix the epoxy resin, amine epoxy resin curing agent, filler and flame retardant evenly to obtain a glue;

[0066] S2, impregnating the glass fiber cloth in the rubber compound, controlling the rubber compound temperature to 23°C, the roller gap of the impregnation roller press to 0.65mm, and the roller linear speed to 48mm / s, so that both sides of the glass fiber cloth are fully impregnated with the rubber compound;

[0067] S3, rolling and cutting the impregnated glass fiber cloth, laying and stacking it in a molding machine, pre-pressing it once every 10 layers, with a pre-pressing pressure of 5 MPa, a mold size of 250×250×10 mm, heating and curing it, with a mold pressure of 6 MPa, a curing temperature of 120° C., and a curing time of 120 min;

[0068] S4, demoulding, to obtain a low-density epoxy composite material support insulation block, the thermal conductivity of the support insulation block is 0.261W / mK, the density is 1.71g / cm 3 , length 250mm, width 250mm, height 10mm.

[0069] Specifically, the composition of the rubber material by mass is as follows: 100 parts of bisphenol A epoxy resin (Daosheng Tianhe, TECHSTORM180, viscosity 1250mPa·s), 30 parts of amine epoxy resin curing agent (Daosheng Tianhe, TECHSTORM185, viscosity 5-25mPa·s), 30 parts of filler (hollow microspheres, density 0.5g / cm3, Shanghai Huijing, HG120), 20 parts of organic phosphorus flame retardant (Daoer New Materials, 8303). Glass fiber cloth (Taishan Glass Fiber E-BX800, biaxial glass fiber cloth, surface density: 800g / m 2 , direction: 0 / 90) 200 copies.

[0070] The preparation device of this embodiment includes a glue mixer 3, the inlet end of the glue mixer is connected to the glue injection machine 2, and the outlet end is connected to the glue dipping machine 4. A cloth placing rack 1 is provided above the glue dipping machine to cooperate with it, and a crawler machine 7 for transmitting glass fiber cloth is provided on one side of the glue dipping machine. An impregnation roller press 5 is provided between the crawler machine 7 and the glue dipping machine 4, and an automatic cloth cutting machine 6 is provided above the crawler machine to cooperate with it. The automatic cloth cutting machine is used to cut the glass fiber cloth, and a molding machine 8 is provided on one side of the crawler machine.

[0071] Specifically, the glue injection machine 2 includes a first storage tank 21 and a second storage tank 22. The bottoms of the first and second storage tanks are connected at a mixing valve 23 through a pipeline, and the mixing valve is connected to the glue mixer through a first glue injection port 24; the first storage tank is used to store epoxy resin, and the second storage tank is used to store epoxy resin curing agent.

[0072] The glue mixer 3 includes a third material storage tank 31 and a fourth material storage tank 32. The third and fourth material storage tanks are connected to the mixing tank 33 through a pipeline, and the mixing tank is connected to the glue dipping machine 4 through a second glue injection port 34. The glue dipping machine includes a glue dipping tank 41 and a constant temperature system. A transmission wheel 42 is provided in the glue dipping tank. The surface of the glass fiber cloth is coated with glue liquid by rotating the transmission wheel. The constant temperature system can control the temperature of the glue in the glue dipping tank, thereby controlling the viscosity of the glue and the amount of glue dipping.

[0073] Examples 1 to 5 were tested according to the standard, and the test results are shown in Table 1.

[0074] Table 1 Test results of Examples 1 to 5

[0075] Test Standards Example 1 Example 2 Example 3 Example 4 Example 5 <![CDATA[Density / g / cm 3 > ISO1183 1.44 1.56 1.41 1.62 1.71 Compression strength / MPa ISO604 271 253 285 276 305 Bending strength / MPa ISO178 465 477 451 462 492 <![CDATA[Impact strength / kJ / m 2 > ISO8302 282 245 279 232 205 Thermal conductivity / W / mK ISO179 0.158 0.162 0.151 0.171 0.261

[0076] It can be seen from Table 1 that the low-density epoxy composite supporting insulation block of the present invention has low density, excellent insulation performance and good mechanical properties, and has broad application prospects; the preparation process is simple and efficient, and large-scale production can be easily achieved, and different sizes can be prepared according to product requirements.

[0077] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A method for preparing a supporting insulation block, characterized in that: The preparation method comprises the following steps: S1: 100 parts of epoxy resin, 20-50 parts of amine epoxy resin curing agent, 10-80 parts of flame retardant and 10-20 parts of filler are put into a rubber mixer and mixed evenly to obtain a rubber compound; S2: dipping 100 to 200 portions of glass fiber cloth into the adhesive by a dipping machine, so that the surface of the glass fiber cloth is fully coated with the adhesive; S3: Fully impregnate the glass fiber cloth through an impregnation roller press, cut the impregnated glass fiber cloth, lay and stack it in a molding press, pre-press once every 5 to 10 layers, and heat and cure to form; S4: demoulding to obtain a composite material supporting insulation block product.

2. A method for preparing a supporting insulation block according to claim 1, characterized in that: In step S1, the epoxy resin is a bisphenol A epoxy resin with an epoxy equivalent of 220 to 240 g / eq, a viscosity of 700 to 900 mPas, and a density of 1.0 to 1.2 g / cc; The amine epoxy resin curing agent is at least one of aliphatic amine, aromatic amine and alicyclic amine, with an amine value of 10 to 13 meq / g, a viscosity of 10 to 50 mPas and a density of 0.9 to 1.0 g / cc; The filler is one or more of fly ash, glass microspheres, and hollow microspheres; The flame retardant is an organic phosphorus flame retardant with a phosphorus content of ≥20%.

3. A method for preparing a supporting insulation block according to claim 1, characterized in that: In step S2, the glass fiber cloth is a biaxial glass fiber cloth with a surface density of 400 to 1200 g / m 2 , direction is 0 / 90, and the rubber temperature is controlled at 20-30℃.

4. A method for preparing a supporting insulation block according to claim 1, characterized in that: In step S3, the roller gap of the impregnation roller press is controlled to be 0.4-1.2 mm and the line speed is controlled to be 10-80 mm / s, so that the adhesive solution fully impregnates the glass fiber cloth.

5. A method for preparing a supporting insulation block according to claim 1, characterized in that: In step S3, the mold pressure is 5-20 MPa, the pre-pressing pressure is 5-10 MPa, the curing temperature is 50-150° C., and the curing time is 120-480 min.

6. The preparation device in the method for preparing a supporting insulation block according to claim 1, characterized in that: The preparation device comprises a glue mixer, the inlet end of the glue mixer is connected to the glue injection machine, the outlet end is connected to the glue dipping machine, a cloth placing rack matched with the glue dipping machine is arranged above the glue dipping machine, a crawler machine for conveying glass fiber cloth is arranged on one side of the glue dipping machine, a dipping roller press is arranged between the crawler machine and the glue dipping machine, an automatic cloth cutting machine matched with the crawler machine is arranged above the crawler machine, the automatic cloth cutting machine is used for cutting the glass fiber cloth, and a molding machine is arranged on one side of the crawler machine.

7. The preparation device in the method for preparing a supporting insulation block according to claim 6, characterized in that: The glue injection machine includes a first storage tank and a second storage tank. The bottoms of the first and second storage tanks are connected at a mixing valve through a pipeline. The mixing valve is connected to the glue mixer through a first glue injection port. The first storage tank is used to store epoxy resin, and the second storage tank is used to store epoxy resin curing agent.

8. The preparation device in the method for preparing a supporting insulation block according to claim 6, characterized in that: The glue mixer comprises a third material storage tank and a fourth material storage tank. The third and fourth material storage tanks are connected with the mixing tank through pipelines, and the mixing tank is connected with the glue dipping machine through the second glue injection port.

9. The preparation device in the method for preparing a supporting insulation block according to claim 6, characterized in that: The glue dipping machine comprises a glue dipping tank, in which a transmission wheel is arranged. The surface of the glass fiber cloth is coated with glue liquid through the rotation of the transmission wheel.

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