A glass fiber reinforced polyurethane composite door and window profile formed by injection impregnation pultrusion process and its processing technology and application

Abstract

This application relates to a glass fiber reinforced polyurethane composite door and window profile formed using an injection-impregnation pultrusion process, as well as its processing technology and application. This application relates to the field of composite materials technology and can be used in the construction field, such as the preparation of doors and windows. The polyurethane material in this application comprises components A and B, with the injection mass ratio of components A and B being 100:(60-100). Component A comprises liquefied MDI, and component B comprises: 100 parts flame-retardant polyether polyol, 2-10 parts 1,4-butanediol, 2-10 parts calcium oxide, 0.3-0.5 parts dimethylethanolamine, 0.5-0.8 parts azobisisobutyronitrile, 0.5-1.5 parts trimethylsiloxysilicate, and 0.1-0.5 parts silicone defoamer. The water content of component B is controlled to be no more than 0.05wt%. This processing method can increase the glass fiber pulling speed while reducing the impact of bubbles, improve the thermal stress concentration problem of the profile product, and further enhance the vertical shear strength of the profile.

Description

Technical Field

[0001] The present application relates to a glass fiber reinforced polyurethane composite door and window profile formed by an injection impregnation pultrusion process, and its processing technology and application, which belongs to the field of composite material technology and can be used in the construction field, such as the preparation of doors and windows. Background Art

[0002] In recent years, energy conservation requirements in the construction industry have become an important part of China's sustainable development. Doors and windows, exterior walls, roofs, and floors in buildings are the four major parts of building energy consumption. Among them, doors and windows are characterized by small thickness, single material, and large contact area with the outside world compared to the other three parts. Their thermal insulation properties are the worst, making enhancing the thermal insulation performance of doors and windows and reducing their energy consumption a key research direction for improving indoor thermal environment quality and improving building energy conservation levels.

[0003] At present, the main door and window materials used in the existing technology are mostly aluminum alloy and PVC. Among them, PVC profiles have a low production threshold, and the pressure of user procurement costs has led to uneven quality of various PVC profile products. The resulting deformation, leakage and other problems have made PVC plastic-steel door and window products have a bad reputation in the market. Therefore, aluminum alloy profiles still occupy a dominant position in the market. However, due to the strong thermal conductivity of aluminum alloy profiles, they are very unfavorable to energy saving and are an important factor in the high energy saving costs.

[0004] Glass fiber reinforced polyurethane pultruded window and door profiles are manufactured using a polyurethane injection, impregnation, and pultrusion process with glass fiber as the reinforcement. Polyurethane inherently possesses excellent thermal insulation properties, and has long been used in the energy-saving window and door industry to manufacture components such as foam sealants, sealing strips, and thermal insulation strips. Polyurethane is now also being used to manufacture entire window frames.

[0005] Compared with traditional materials, polyurethane pultruded profile window frames, which are mainly made of glass fiber reinforced polyurethane pultruded door and window profiles, have stronger dimensional stability, higher lateral mechanical properties, higher specific strength and rigidity, and better thermal insulation effects. In addition, its pultrusion process does not contain volatile organic compounds (VOCs), making polyurethane pultruded profile window frames a popular material choice for energy saving and environmental protection.

[0006] In the existing technology, the injection dipping pultrusion process is mainly used to prepare polyurethane pultruded profiles. Due to the process characteristics of reactive pultrusion, the prepolymer reacts and forms in a short time, which can easily lead to thermal stress concentration inside the product, resulting in defects inside the product, thereby affecting the hardness and strength of the product, and even cracks. In addition, the control of moisture in the preparation process in the existing technology is not strict, which can easily lead to excessive bubbles in the product, affecting the strength of the product. In addition, the pulling speed of the glass fiber in the existing technology is slow, and the processing process is time-consuming, and there is still room for improvement. In addition, the strength of the product in the tensile direction of the existing technology can be guaranteed, but the strength of the profile in the vertical direction, such as shear strength, is slightly poor.

[0007] In view of the above problems existing in the pultruded door and window profiles in the prior art, it is necessary to provide a new processing technology for glass fiber reinforced polyurethane composite door and window profiles formed by injection dipping and pultrusion process to meet market demand. Summary of the Invention

[0008] In order to solve the above problems, a glass fiber reinforced polyurethane composite door and window profile formed by injection dipping and pultrusion process and its processing technology and application are provided. The processing technology of the present application can increase the glass fiber pulling speed while reducing the impact of bubbles, and improve the problem of thermal stress concentration in the profile product. In addition, the shear strength performance of the profile in the vertical direction is also improved.

[0009] The present application discloses a processing technology for glass fiber reinforced polyurethane composite door and window profiles formed by injection dipping and pultrusion process, the processing technology comprising the following steps:

[0010] S1. Prepare continuous glass fiber, arrange it through a guide plate under the traction of a traction machine, and then enter the forming mold;

[0011] S2. The syringe simultaneously injects the polyurethane material into the forming mold. The polyurethane material undergoes a polymerization reaction while the glass fiber is impregnated. The glass fiber is continuously pulled to complete pultrusion molding.

[0012] S3, after leaving the forming mold and cooling, the glass fiber reinforced polyurethane composite door and window profile is obtained;

[0013] The syringe includes a syringe A and a syringe B, the polyurethane material includes component A and component B, the injection mass ratio of component A to component B is 100:(60-100), the component A includes liquefied MDI, and the component B includes, by weight, 100 parts of flame-retardant polyether polyol, 2-10 parts of 1,4-butanediol, 2-10 parts of calcium oxide, 0.3-0.5 parts of dimethylethanolamine, 0.5-0.8 parts of azobisisobutyronitrile, 0.5-1.5 parts of trimethylsiloxysilicate and 0.1-0.5 parts of silicone defoaming agent, and the syringe A and syringe B respectively contain the component A and component B;

[0014] The water content of component B is controlled to be no higher than 0.05 wt %.

[0015] Optionally, the glass fiber is pre-treated with a surface modification treatment, and the surface modification treatment comprises the following steps:

[0016] Preheat the glass fiber to 50~80℃;

[0017] Immerse the preheated glass fiber in the impregnation agent for 20 to 60 minutes;

[0018] After taking out the glass fiber and drying it, the surface-modified glass fiber is obtained;

[0019] The impregnation treatment agent comprises, by weight, 20 to 40 parts of silane coupling agent KH-550, 10 to 30 parts of hydroxy cellulose, 5 to 10 parts of lubricant, 2 to 5 parts of emulsifier, and 0.1 to 1.0 part of defoaming agent.

[0020] Optionally, the syringe further comprises a premixer C, which is disposed after the syringe A and the syringe B. The components A and B are mixed in the premixer C to form a polyurethane material, which then enters the molding die.

[0021] The syringe A, syringe B and premixer C are subjected to heat preservation treatment, and the temperature range is controlled at 25-40°C;

[0022] Preferably, the temperature range is controlled at 30-40°C.

[0023] Optionally, the forming mold is sequentially provided with a cooling zone of 0.5 to 0.8 m in length, a first heating zone of 0.2 to 0.4 m in length, a second heating zone of 0.2 to 0.4 m in length, and a third heating zone of 0.2 to 0.4 m in length;

[0024] The temperature of the cooling zone is 40-70°C, the temperature of the first heating zone is 100-120°C, the temperature of the second heating zone is 120-150°C, and the temperature of the third heating zone is 150-190°C.

[0025] Optionally, a curing holding zone of 0.4 to 3.0 m in length is provided after the third heating zone of the forming mold;

[0026] The temperature range of the solidification holding zone is consistent with the temperature range of the third heating zone.

[0027] Optionally, the pulling speed of the glass fiber is 0.9~1.1m / min.

[0028] Optionally, the glass fiber accounts for 75-78 wt % of the glass fiber reinforced polyurethane composite door and window profile.

[0029] Optionally, the component B further comprises 1 to 5 parts of a flame retardant;

[0030] Optionally, the flame retardant is antimony trioxide.

[0031] The present application provides a glass fiber reinforced polyurethane composite door and window profile prepared by the processing technology of the glass fiber reinforced polyurethane composite door and window profile formed by the injection dipping and pultrusion process.

[0032] The present application provides the application of the above-mentioned glass fiber reinforced polyurethane composite door and window profile in building door and window products.

[0033] The beneficial effects of this application include but are not limited to:

[0034] 1. According to the present application's glass fiber-reinforced polyurethane composite door and window profiles formed using an injection-impregnation pultrusion process, as well as their processing and applications, the addition of trimethylsiloxysilicate and 0.1-0.5 parts of an organosilicon defoaming agent to component B effectively reduces the generation of bubbles caused by the rapid glass fiber pulling speed during the pultrusion process, thereby reducing the generation of large bubbles that affect product performance. Furthermore, even when the glass fiber pulling speed is increased to 0.9-1.1 m / min, good bubble control can be maintained.

[0035] 2. Regarding the glass fiber reinforced polyurethane composite door and window profile formed by the injection, dipping and pultrusion process of this application, as well as its processing technology and applications, to address water, another factor that causes bubbles, calcium oxide is added to component B while controlling the water content of component B to no more than 0.05 wt%. This not only removes excess water, thereby controlling bubble formation, but also allows the calcium oxide and the resulting product to act as fillers, enhancing the product's strength.

[0036] 3. According to the glass fiber-reinforced polyurethane composite door and window profiles formed by the injection-impregnation pultrusion process of this application, as well as their processing and applications, due to the characteristics of the pultrusion process itself, the performance in the pultrusion direction can be well guaranteed. However, the performance in the vertical direction, especially the shear strength performance, is poor. In particular, after the pulling speed is increased to 0.9-1.1 m / min, the vertical performance is difficult to guarantee. Therefore, in this application, the silane coupling agent KH550 is used to modify and pre-treat the glass fiber, which can significantly improve the performance in the vertical direction. KH550 also exhibits better modification performance than other silane coupling agents such as KH570.

[0037] 4. According to the glass fiber reinforced polyurethane composite door and window profile formed by the injection, dipping and pultrusion process of this application, as well as its processing technology and application, the problem of thermal stress release during the polyurethane molding process is improved mainly through the following three aspects: 1) The addition of an ionic initiator azobisisobutyronitrile and dimethylethanolamine to component B can reduce the degree of reaction during the mixing process of components A and B, thereby making the components in the polyurethane material more evenly mixed, thereby improving the uniformity of the reaction heat release during curing and avoiding the problem of local overheating leading to concentrated thermal stress and difficulty in releasing it. In addition, the polyurethane material after mixing components A and B has better fluidity and is less likely to solidify and cause equipment blockage during the dipping process, reducing equipment downtime for cleaning. frequency, thereby improving production efficiency; 2) By optimizing the temperature conditions for heating and curing, better control of the release of thermal stress during the curing process is achieved. In addition, since the reaction is exothermic during the curing process of polyurethane, setting a gradually increasing heating temperature can increase the external heating temperature while the curing reaction is gradually proceeding and the internal reaction exotherm accumulates, thereby ensuring the uniformity of the overall temperature of the product and improving the problem of thermal stress concentration; 3) A curing holding zone is set after the third heating zone. After the polyurethane reaction inside the profile is complete, the temperature begins to gradually decrease and the curing is completed. During the process of gradual cooling inside, the external heating temperature is still maintained at a higher level, which can make the thermal stress in the profile more completely released from the inside to the outside.

[0038] 5. According to the present application's glass fiber-reinforced polyurethane composite door and window profiles formed using an injection-impregnation and pultrusion process, as well as their processing and applications, since glass fiber inherently has superior flame retardancy compared to polyurethane materials, controlling the glass fiber content to a relatively high value of 75-78% ensures that the profiles possess excellent flame retardancy. Furthermore, by using a flame-retardant polyether polyol and adding the flame retardant antimony trioxide, the overall flame retardancy of the profiles can be further enhanced, making them more suitable for the flame retardancy requirements of architectural door and window products. DETAILED DESCRIPTION

[0039] The present application is described in detail below with reference to examples, but the present application is not limited to these examples. Unless otherwise specified, the raw materials and reagents in the examples of the present application are purchased through commercial channels.

[0040] Example 1

[0041] The polyurethane material used in the infiltration step of the processing technology of this embodiment is a mixture of component A and component B. The syringe structure in the processing equipment includes syringe A, syringe B and premixer C. Syringe A and syringe B respectively contain component A and component B. Component A and component B are mixed in premixer C to form a polyurethane material, which is then injected into the molding mold.

[0042] Among them, component A is liquefied MDI (item number MDI-100HL, purchased from Wanhua Chemical), component B is 100 parts of flame retardant polyether polyol (item number YB-3028, purchased from Jiangyin Youbang Chemical Co., Ltd.), 6 parts of 1,4-butanediol, 6 parts of calcium oxide, 0.4 parts of dimethylethanolamine, 0.6 parts of azobisisobutyronitrile, 1.0 parts of trimethylsiloxysilicate, 0.3 parts of silicone defoaming agent (item number LT-4002, purchased from Lutailuida New Material Technology Co., Ltd.) and 3 parts of antimony trioxide.

[0043] The processing technology includes the following steps:

[0044] S0, pre-treatment of glass fiber surface modification:

[0045] 1) Preheat the glass fiber to 65°C;

[0046] 2) Immerse the preheated glass fiber in the impregnation agent for 40 minutes;

[0047] 3) taking out the glass fiber and drying it to obtain the surface-modified glass fiber;

[0048] The impregnation treatment agent includes, by weight, 30 parts of silane coupling agent KH-550, 20 parts of hydroxy cellulose, 7.5 parts of lubricant, 3.5 parts of emulsifier, and 0.6 parts of defoaming agent.

[0049] S1. Prepare continuous glass fiber, arrange it through a guide plate under the traction of a traction machine, and then enter the forming mold;

[0050] S2. The syringe simultaneously injects the polyurethane material into the forming mold, and the injection mass ratio of component A and component B is controlled to be 100:80. The polyurethane material undergoes a polymerization reaction while the glass fiber is impregnated. The glass fiber is continuously pulled to complete pultrusion molding. The pulling speed of the glass fiber is 1.0 m / min.

[0051] S3. After leaving the molding die and cooling, the glass fiber reinforced polyurethane composite door and window profile is obtained, and the glass fiber content in the total amount of the glass fiber reinforced polyurethane composite door and window profile is controlled to be 75-78 wt % by controlling the impregnation process and subsequent molding process.

[0052] Specifically in the processing technology, syringe A, syringe B and premixer C are subjected to insulation treatment, and the temperature range is controlled at 35°C; the molding mold is sequentially provided with a 0.6m long cooling zone, a 0.3m long first heating zone, a 0.3m long second heating zone and a 0.3m long third heating zone; the temperature of the cooling zone is 50°C, the temperature of the first heating zone is 110°C, the temperature of the second heating zone is 135°C, and the temperature of the third heating zone is 170°C; a 1.0m long curing holding zone is provided after the third heating zone of the molding mold, and the temperature range of the curing holding zone is consistent with the temperature range of the third heating zone.

[0053] Example 2

[0054] The polyurethane material used in the infiltration step of the processing technology of this embodiment is a mixture of component A and component B. The syringe structure in the processing equipment includes syringe A, syringe B and premixer C. Syringe A and syringe B respectively contain component A and component B. Component A and component B are mixed in premixer C to form a polyurethane material, which is then injected into the molding mold.

[0055] Among them, component A is liquefied MDI (item number MDI-100HL, purchased from Wanhua Chemical), component B is 100 parts of flame retardant polyether polyol (item number YB-3028, purchased from Jiangyin Youbang Chemical Co., Ltd.), 2 parts of 1,4-butanediol, 2 parts of calcium oxide, 0.3 parts of dimethylethanolamine, 0.5 parts of azobisisobutyronitrile, 0.5 parts of trimethylsiloxysilicate, 0.1 parts of silicone defoaming agent (item number LT-4002, purchased from Lutailuida New Material Technology Co., Ltd.) and 1 part of antimony trioxide.

[0056] The processing technology includes the following steps:

[0057] S0, pre-treatment of glass fiber surface modification:

[0058] 1) Preheat the glass fiber to 50°C;

[0059] 2) Immerse the preheated glass fiber in the impregnation agent for 60 minutes;

[0060] 3) taking out the glass fiber and drying it to obtain the surface-modified glass fiber;

[0061] The impregnation treatment agent includes, by weight, 20 parts of silane coupling agent KH-550, 10 parts of hydroxy cellulose, 5 parts of lubricant, 2 parts of emulsifier, and 0.1 part of defoaming agent.

[0062] S1. Prepare continuous glass fiber, arrange it through a guide plate under the traction of a traction machine, and then enter the forming mold;

[0063] S2. The syringe simultaneously injects polyurethane material into the molding die, controlling the injection mass ratio of component A to component B to be 5:3. The polyurethane material undergoes a polymerization reaction while being impregnated with the glass fiber, and pultrusion molding is completed under the action of continuous traction of the glass fiber. The traction speed of the glass fiber is 0.9 m / min.

[0064] S3. After leaving the molding die and cooling, the glass fiber reinforced polyurethane composite door and window profile is obtained, and the glass fiber is controlled to account for 75-78% of the total amount of the glass fiber reinforced polyurethane composite door and window profile by controlling the impregnation process and subsequent molding processes.

[0065] Specifically in the processing technology, syringe A, syringe B and premixer C are subjected to insulation treatment, and the temperature range is controlled at 25°C; the molding mold is sequentially provided with a 0.5m long cooling zone, a 0.4m long first heating zone, a 0.4m long second heating zone and a 0.2m long third heating zone; the temperature of the cooling zone is 40°C, the temperature of the first heating zone is 100°C, the temperature of the second heating zone is 120°C, and the temperature of the third heating zone is 150°C; a 0.4m long curing holding zone is provided after the third heating zone of the molding mold, and the temperature range of the curing holding zone is consistent with the temperature range of the third heating zone.

[0066] Example 3

[0067] The polyurethane material used in the infiltration step of the processing technology of this embodiment is a mixture of component A and component B. The syringe structure in the processing equipment includes syringe A, syringe B and premixer C. Syringe A and syringe B respectively contain component A and component B. Component A and component B are mixed in premixer C to form a polyurethane material, which is then injected into the molding mold.

[0068] Among them, component A is liquefied MDI (item number MDI-100HL, purchased from Wanhua Chemical), component B is 100 parts of flame retardant polyether polyol (item number YB-3028, purchased from Jiangyin Youbang Chemical Co., Ltd.), 10 parts of 1,4-butanediol, 10 parts of calcium oxide, 0.5 parts of dimethylethanolamine, 0.8 parts of azobisisobutyronitrile, 1.5 parts of trimethylsiloxysilicate, 0.5 parts of silicone defoaming agent (item number LT-4002, purchased from Lutailuida New Material Technology Co., Ltd.) and 5 parts of antimony trioxide.

[0069] The processing technology includes the following steps:

[0070] S0, pre-treatment of glass fiber surface modification:

[0071] 1) Preheat the glass fiber to 80°C;

[0072] 2) Immerse the preheated glass fiber in the impregnation agent for 20 minutes;

[0073] 3) taking out the glass fiber and drying it to obtain the surface-modified glass fiber;

[0074] The impregnation treatment agent includes, by weight, 40 parts of silane coupling agent KH-550, 30 parts of hydroxy cellulose, 10 parts of lubricant, 5 parts of emulsifier, and 1.0 part of defoaming agent.

[0075] S1. Prepare continuous glass fiber, arrange it through a guide plate under the traction of a traction machine, and then enter the forming mold;

[0076] S2. The syringe simultaneously injects the polyurethane material into the molding die, controlling the injection mass ratio of component A to component B to be 1:1. The polyurethane material undergoes a polymerization reaction while the glass fiber is impregnated. The glass fiber is continuously pulled to complete pultrusion molding. The pulling speed of the glass fiber is 1.1 m / min.

[0077] S3. After leaving the molding die and cooling, the glass fiber reinforced polyurethane composite door and window profile is obtained, and the glass fiber is controlled to account for 75-78% of the total amount of the glass fiber reinforced polyurethane composite door and window profile by controlling the impregnation process and subsequent molding processes.

[0078] Specifically in the processing technology, syringe A, syringe B and premixer C are subjected to insulation treatment, and the temperature range is controlled at 40°C; the molding mold is sequentially provided with a 0.8m long cooling zone, a 0.2m long first heating zone, a 0.2m long second heating zone and a 0.4m long third heating zone; the temperature of the cooling zone is 60°C, the temperature of the first heating zone is 120°C, the temperature of the second heating zone is 150°C, and the temperature of the third heating zone is 190°C; a 0.6m long curing holding zone is provided after the third heating zone of the molding mold, and the temperature range of the curing holding zone is consistent with the temperature range of the third heating zone.

[0079] Example 4

[0080] This embodiment is basically the same as embodiment 1, except that the pulling speed of the glass fiber is 0.8 m / min.

[0081] Example 5

[0082] This embodiment is substantially the same as embodiment 1, except that the silane coupling agent is replaced with an equal amount of KH560.

[0083] Example 6

[0084] This embodiment is substantially the same as embodiment 1, except that the silane coupling agent is replaced with an equal amount of KH570.

[0085] Example 7

[0086] This embodiment is basically the same as embodiment 1, except that the temperatures of the first heating zone, the second heating zone and the third heating zone are kept consistent at 140°C.

[0087] Example 8

[0088] This embodiment is basically the same as embodiment 1, except that a curing holding zone after the third heating zone is not provided.

[0089] Comparative Example 1

[0090] This comparative example is basically the same as Example 1, except that calcium oxide is not contained and the moisture content of component B is not controlled. The moisture content of component B used in the test is 0.12 wt %.

[0091] Comparative Example 2

[0092] This comparative example is substantially the same as Example 1, except that trimethylsiloxysilicate is replaced with an equal amount of an organosilicon defoaming agent.

[0093] Comparative Example 3

[0094] This comparative example is basically the same as Example 1, except that it does not contain a pretreatment step for modifying the glass fiber.

[0095] Comparative Example 4

[0096] This comparative example is substantially the same as Example 1, except that azobisisobutyronitrile is replaced by an equal amount of dimethylethanolamine.

[0097] Comparative Example 5

[0098] This comparative example is substantially the same as Example 1, except that it does not contain azobisisobutyronitrile.

[0099] Test Example 1

[0100] The profiles obtained in the examples and comparative examples were subjected to performance tests, including interlaminar shear strength (MPa, GB / T 41501), flexural strength (MPa, GB / T 1449), tensile strength (MPa, ISO 527-4), thermal conductivity (W / m*K, GB / T 3139), and flame retardancy. The quality of the profiles prepared under various process conditions was statistically analyzed to calculate the yield (%). The test results are shown in Table 1 below.

[0101] Table 1 Performance test results of the profiles of the embodiment and the comparative example

[0102]

[0103] Table 1 continued

[0104]

[0105] According to the results in Table 1, the adjustment and optimization of the processing technology and components in the present application scheme realizes the control of bubbles in the pultrusion process, and improves the interface bonding performance of polyurethane and glass fiber in the pultrusion process by reducing the pores generated at the interface between polyurethane and glass fiber, thereby significantly improving the shear strength performance of the profile.

[0106] In the present application, by improving the components and optimizing the curing process, the thermal stress release of polyurethane in the pultrusion process can be significantly improved, so that the yield of the profile is significantly improved. After the pultruded profile is cured, the bending caused by the release of thermal stress cannot be repaired by grinding. Grinding will destroy the comprehensive performance of the profile and make the product unusable. Therefore, once bending or deformation occurs, the profile product can only be discarded as waste. Therefore, the present application can significantly reduce the production cost of the profile by controlling the thermal stress, so that the process can improve the market competitiveness of glass fiber reinforced polyurethane door and window materials, which is of great significance for its wide application. On the other hand, the improvement of thermal stress can significantly reduce the generation of cracks inside the profile, and also improve the mechanical properties of the profile such as tensile strength and bending strength, thereby improving the comprehensive performance of the profile product.

[0107] At the same time, when the operators tested the processing technology of comparative examples 4 and 5, they found that the polyurethane material was very easy to solidify and aggregate in the dipping device, causing equipment blockage, requiring more frequent shutdowns for cleaning and maintenance. The present application solution can significantly reduce the frequency of shutdowns for maintenance. For continuous production processes, the present application solution can significantly improve production efficiency, which is of great significance to improving production benefits.

[0108] In addition, the profile provided by the present application has good thermal insulation and flame retardant properties, can meet the requirements of thermal insulation and flame retardant properties of materials used in construction, and is suitable as a door and window profile for construction.

[0109] The foregoing is merely an embodiment of the present application, and the scope of protection of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the technical ideas and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A process for producing glass fiber reinforced polyurethane composite door and window profiles formed by injection impregnation and pultrusion, characterized in that: The processing technology comprises the following steps: S1. Prepare continuous glass fiber, arrange it through a guide plate under the traction of a traction machine, and then enter the forming mold; S2. The syringe simultaneously injects the polyurethane material into the forming mold. The polyurethane material undergoes a polymerization reaction while the glass fiber is impregnated. The glass fiber is continuously pulled to complete pultrusion molding. S3, after leaving the forming mold and cooling, the glass fiber reinforced polyurethane composite door and window profile is obtained; The syringe includes a syringe A and a syringe B, the polyurethane material includes component A and component B, the injection mass ratio of component A to component B is 100:(60-100), the component A includes liquefied MDI, and the component B includes, by weight, 100 parts of flame-retardant polyether polyol, 2-10 parts of 1,4-butanediol, 2-10 parts of calcium oxide, 0.3-0.5 parts of dimethylethanolamine, 0.5-0.8 parts of azobisisobutyronitrile, 0.5-1.5 parts of trimethylsiloxysilicate and 0.1-0.5 parts of silicone defoaming agent, and the syringe A and syringe B respectively contain the component A and component B; Controlling the water content of component B to be no higher than 0.05 wt%; The forming mold is sequentially provided with a cooling zone of 0.5 to 0.8 m in length, a first heating zone of 0.2 to 0.4 m in length, a second heating zone of 0.2 to 0.4 m in length, and a third heating zone of 0.2 to 0.4 m in length; the temperature of the cooling zone is 40 to 70° C., the temperature of the first heating zone is 100 to 120° C., the temperature of the second heating zone is 120 to 150° C., and the temperature of the third heating zone is 150 to 190° C.; A curing holding zone with a length of 0.4 to 3.0 m is provided after the third heating zone of the forming mold; the temperature range of the curing holding zone is consistent with the temperature range of the third heating zone.

2. The processing technology of glass fiber reinforced polyurethane composite door and window profiles formed by injection dipping and pultrusion process according to claim 1 is characterized in that: The glass fiber is pre-treated with a surface modification process, wherein the surface modification process comprises the following steps: 1) Preheat the glass fiber to 50-80°C; 2) Immerse the preheated glass fiber in the impregnation agent for 20 to 60 minutes; 3) taking out the glass fiber and drying it to obtain the surface-modified glass fiber; The impregnation treatment agent comprises, by weight, 20 to 40 parts of silane coupling agent KH-550, 10 to 30 parts of hydroxy cellulose, 5 to 10 parts of lubricant, 2 to 5 parts of emulsifier, and 0.1 to 1.0 part of defoaming agent.

3. The processing technology of glass fiber reinforced polyurethane composite door and window profiles formed by injection impregnation pultrusion process according to claim 1 is characterized in that: The syringe further includes a premixer C, which is disposed after the syringe A and the syringe B. The components A and B are mixed in the premixer C to form a polyurethane material, which then enters the molding die. The syringe A, syringe B and premixer C are subjected to heat preservation treatment, and the temperature range is controlled at 25-40°C.

4. The processing technology of glass fiber reinforced polyurethane composite door and window profiles formed by injection impregnation and pultrusion according to claim 3 is characterized in that: The temperature range of the heat preservation treatment of the syringe A, the syringe B and the premixer C is controlled at 30-40°C.

5. The processing technology of glass fiber reinforced polyurethane composite door and window profile formed by injection impregnation pultrusion process according to claim 1 is characterized in that: The pulling speed of the glass fiber is 0.9-1.1 m / min.

6. The processing technology of glass fiber reinforced polyurethane composite door and window profiles formed by injection impregnation pultrusion process according to claim 1 is characterized in that: The glass fiber accounts for 75-78 wt % of the glass fiber reinforced polyurethane composite door and window profile.

7. The processing technology of glass fiber reinforced polyurethane composite door and window profiles formed by injection impregnation pultrusion process according to claim 1 is characterized in that: The component B also includes 1 to 5 parts of a flame retardant.

8. The processing technology of glass fiber reinforced polyurethane composite door and window profiles formed by injection impregnation and pultrusion according to claim 7, characterized in that: The flame retardant is antimony trioxide.

9. The glass fiber reinforced polyurethane composite door and window profile prepared by the processing technology of glass fiber reinforced polyurethane composite door and window profile formed by injection impregnation pultrusion process as claimed in any one of claims 1 to 8.

10. Use of the glass fiber reinforced polyurethane composite door and window profile as claimed in claim 9 in building door and window products.

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