Glass fiber prepreg tape and high-strength water supply pipe prepared using the same

Abstract

The present application relates to the technical field of trenchless pipe repair, and particularly relates to a glass fiber prepreg and a high-strength water supply pipe prepared by using the same. The glass fiber prepreg comprises a prepreg and a glass fiber fabric, and the prepreg accounts for 30-50 wt% of the total mass of the glass fiber prepreg. The prepreg is made of the following raw materials: 100-120 parts of unsaturated polyester composition, 40-60 parts of active diluent, 5-10 parts of TPU filament aggregate, 20-40 parts of filler composition, 0.05-0.20 parts of defoaming agent, 0.5-2.5 parts of adhesion promoter, 0.6-1.2 parts of leveling agent, 0.4-0.8 parts of polymerization inhibitor, 1-2 parts of thermal initiator, and 1-5 parts of TMI end-capped crosslinking agent. The glass fiber prepreg in the present application can be used for trenchless repair of plastic pipes, and the repair outer layer formed by thermal curing of the glass fiber prepreg has good dimensional stability, impact strength, corrosion resistance and bonding stability.

Description

Technical Field

[0001] This invention relates to the field of trenchless pipeline repair technology, and in particular to a fiberglass prepreg tape and a high-strength water supply pipe made therefrom. Background Technology

[0002] Trenchless repair technology can be used to repair damaged pipelines and extend the service life of municipal pipelines, showing promising market prospects in the field of municipal pipeline network repair. Products derived from trenchless repair technology for repairing damaged pipelines are typically impregnated fiberglass tapes made of thermosetting resin and fiberglass mesh.

[0003] Currently available thermosetting resins can be selected from epoxy resin-based impregnation, unsaturated polyester resin impregnation, vinyl ester resin impregnation, and UV resin impregnation. Different thermosetting resins are selected based on different application scenarios. For example, UV resin impregnation can be used for thin-walled pipe repair due to its high curing efficiency and environmental friendliness. However, UV resin impregnation is not suitable for thick-walled pipe repair or complex bend repair. The main reason is that UV light has limited penetration, resulting in incomplete curing of thick-walled pipes, and for bends, the UV lamp cannot pass through smoothly for curing.

[0004] Epoxy resin-based impregnation has excellent adhesion, mechanical properties, chemical stability and low curing shrinkage, but its price is relatively high and its weather resistance and brittleness are poor, which limits its application.

[0005] Vinyl resin impregnation has the advantages of excellent corrosion resistance, mechanical properties, adhesion properties and high curing efficiency, but it also has obvious drawbacks: high curing shrinkage rate, with a volume shrinkage rate of ≥4.0% during curing, and the cost is usually higher than that of traditional unsaturated polyester resins, which limits its application.

[0006] For most repairs of municipal pipelines with defects, the impregnation material used is primarily low-cost unsaturated polyester resin. However, impregnated fiberglass tapes made with unsaturated polyester resin suffer from issues such as high curing shrinkage and brittleness after curing. To address this, physical blending modifications using thermoplastic polymers such as polyethylene, polyvinyl chloride, polystyrene, ABS, polymethyl methacrylate, and phthalate have been employed. While this can improve the dimensional stability and impact resistance of the impregnated fiberglass tape to some extent, the development of trenchless repair technology has placed higher demands on the corrosion resistance, dimensional stability, and impact resistance of impregnated fiberglass tapes made with unsaturated polyester resin. Therefore, the inventors have provided a fiberglass prepreg tape and a high-strength water supply pipe made from it. Summary of the Invention

[0007] To meet the market's demand for higher corrosion resistance, dimensional stability, and impact resistance in glass fiber prepreg tape produced by unsaturated polyester resin impregnation, this invention provides a glass fiber prepreg tape and a high-strength water supply pipe made therefrom.

[0008] The fiberglass prepreg tape provided by this invention is achieved through the following technical solution: A fiberglass prepreg tape includes a prepreg and a fiberglass fabric, wherein the prepreg accounts for 30-50 wt% of the total mass of the fiberglass prepreg tape; the prepreg is made from the following raw materials in parts by weight: 100-120 parts of unsaturated polyester composition, 40-60 parts of reactive diluent, 5-10 parts of TPU filament aggregate, 20-40 parts of filler composition, 0.05-0.20 parts of defoamer, 0.5-2.5 parts of adhesion promoter, 0.6-1.2 parts of leveling agent, 0.4-0.8 parts of polymerization inhibitor, 1-2 parts of thermal initiator, and 1-5 parts of TMI end-capping crosslinking agent.

[0009] The fiberglass prepreg tape of this invention is used for trenchless repair of plastic pipes. The repair outer layer formed by the thermosetting of the fiberglass prepreg tape has good dimensional stability, impact strength, corrosion resistance, and adhesion stability, which can effectively extend the service life of plastic pipes, reduce pipe maintenance costs, and meet the market's higher requirements for corrosion resistance, dimensional stability, and impact resistance of impregnated fiberglass tape produced by unsaturated polyester resin impregnation.

[0010] Preferably, the fiberglass fabric has a thickness of 0.18-0.50 mm and a basis weight of 180-500 g / m³. 2 The weave structure is plain weave, twill weave, or satin weave.

[0011] Preferably, the unsaturated polyester composition is compounded from at least one of bisphenol A type unsaturated polyester resin and / or terephthalic type unsaturated polyester resin, along with isophthalic type unsaturated polyester resin and orthophthalic type unsaturated polyester resin.

[0012] In this invention, bisphenol A type unsaturated polyester resin and terephthalic type unsaturated polyester resin are used as the main unsaturated polyester resins. Isophthalic type unsaturated polyester resin has relatively low viscosity and good corrosion resistance. The combined use of these resins can effectively improve the corrosion resistance and hydrolytic stability of the CIPP repair outer layer, thereby improving the service life of the repaired plastic pipe and reducing pipe maintenance costs. Furthermore, the appropriate addition of orthophthalic type unsaturated polyester resin can reduce the overall production cost and lower the viscosity of the prepreg, facilitating the production of prepreg tape.

[0013] More preferably, the unsaturated polyester composition comprises the following raw materials in weight percentages: 50-70% bisphenol A type unsaturated polyester resin, 10-25% orthophthalic type unsaturated polyester resin, and the balance being isophthalic type unsaturated polyester resin.

[0014] Preferably, the reactive diluent is one or more of o-phenylphenoxyethyl acrylate, 2-hydroxyethyl methacrylate diphenyl phosphate, bisphenol A glycerol dimethacrylate, and bisphenol A ethoxy acid diacrylate.

[0015] More preferably, the reactive diluent is composed of the following raw materials in weight percentage: 10-25% o-phenylphenoxyethyl acrylate, 50-70% bisphenol A glycerol dimethacrylate, and the balance being diphenyl methacrylate-2-hydroxyethyl phosphate.

[0016] By adopting the above technical solution, the viscosity of the prepreg can be improved, making it easier to carry out prepreg tape construction operations.

[0017] Preferably, the TPU filament aggregate is composed of the following raw materials in weight percentage: 10-30% TPU filaments with a diameter of 0.10-38 mm and a length of 1.0±0.1 mm, 15-35% TPU filaments with a diameter of 0.10-38 mm and a length of 2.5±0.25 mm, and the balance being TPU filaments with a diameter of 0.10-38 mm and a length of 5.0±0.5 mm.

[0018] Compared to conventional powdered thermoplastic resin fillers, the TPU filament aggregate in this invention can effectively reduce the curing shrinkage of the prepreg tape, improve the dimensional stability of the CIPP repair outer layer, and lay the foundation for subsequent molding or winding repair of pipes.

[0019] Preferably, the TMI end-capping crosslinking agent is mainly prepared by phthalic anhydride polyester polyol and 3-isopropyl-dimethylbenzyl isocyanate TMI in a molar ratio of 1.00:(0.99-1.00); the hydroxyl value of the phthalic anhydride polyester polyol is 160-460 mgKOH / g.

[0020] Compared with conventional crosslinking agent - 1,3,5-triallyl cyanurate, the self-made TMI end-capping crosslinking agent used in this invention has soft segment and hard segment structures, which are uniformly distributed in the three-dimensional network structure of the cured material. This can better improve the dimensional stability, impact strength and corrosion resistance of fiber-reinforced plastics, especially significantly improve the impact strength of fiber-reinforced plastics.

[0021] Preferably, the filler composition comprises the following raw materials in parts by weight: 1.5-3.0 parts of anti-yellowing agent, 0.4-1.0 parts of antibacterial agent, 0.5-3.0 parts of thixotropic agent, and 15-30 parts of synthetic fluorophlogopite powder.

[0022] The flake-shaped synthetic fluorophlogopite powder in this invention endows the CIPP repair outer layer with excellent dimensional stability, barrier properties, thermal stability, and corrosion resistance.

[0023] Preferably, the anti-yellowing agent is at least one of nano-titanium nitride and hindered amine light stabilizer.

[0024] The anti-yellowing additive in this invention can improve the anti-yellowing and anti-aging properties of the outer layer of CIPP repair, thereby improving the service life of the repaired plastic pipe and reducing pipe maintenance costs.

[0025] Preferably, the antibacterial adjuvant is at least one of nano-titanium oxynitride and nano-titanium dioxide.

[0026] The antibacterial additive in this invention can impart antibacterial and hygienic properties to the outer layer of CIPP repair, resist external microbial corrosion, thereby improving the service life of the repaired plastic pipe and reducing pipe maintenance costs.

[0027] Preferably, the thixotropic agent is at least one of nano-magnesium oxide and nano-fumed silica.

[0028] The present invention provides a high-strength water supply pipe made using fiberglass prepreg tape, which is achieved through the following technical solution: A high-strength water supply pipe made using fiberglass prepreg tape includes a plastic inner tube, a PET film laminated to the outer wall of the plastic inner tube, and a CIPP repair outer layer formed on the PET film by thermosetting the fiberglass prepreg tape. A corona layer is formed on the outer wall of the plastic inner tube, and the PET film is laminated to the corona layer on the plastic outer wall by hot pressing or hot melt adhesive. An interface modification layer is formed on the surface of the PET film facing away from the plastic inner tube by low-temperature plasma treatment. An aminosilane modified liquid is coated onto the surface of the interface modification layer by scraping or spin coating, followed by drying and thermosetting to form an aminosilane active crosslinking layer. The CIPP repair outer layer is laminated to the aminosilane active crosslinking layer of the PET film.

[0029] Water supply pipes can be directly produced using the fiberglass prepreg tape of this invention. The resulting water supply pipes have excellent mechanical properties, bonding stability, dimensional stability, impact strength, corrosion resistance, and weather resistance.

[0030] In summary, the present invention has the following advantages: 1. The fiberglass prepreg tape in this invention is used for trenchless repair of plastic pipes. The repair outer layer formed by the thermosetting of the fiberglass prepreg tape has good dimensional stability, impact strength, corrosion resistance and bonding stability, which can effectively extend the service life of plastic pipes and reduce pipe maintenance costs.

[0031] 2. The fiberglass prepreg tape provided by this invention has curing shrinkage and dimensional stability comparable to epoxy prepreg, which facilitates the repair of damaged pipes by molding or wrapping, thereby improving the repair quality and service life of the plastic pipes and reducing pipe maintenance costs. Detailed Implementation

[0032] To further understand the inventiveness and technical advancements of this invention, the preferred embodiments of this invention will be discussed in detail below with reference to examples and comparative examples.

[0033] Example: A fiberglass prepreg tape includes a prepreg and a fiberglass fabric. The prepreg accounts for 30-50 wt% of the total mass of the fiberglass prepreg tape. The fiberglass fabric has a thickness of 0.18-0.50 mm and a basis weight of 180-500 g / m. 2 The fabric structure is plain weave, twill weave, or satin weave. The fiberglass fabric can be any one of the following: Jiangxi Dahua Fiberglass Group Co., Ltd.'s fiberglass plain weave fabric 3732; Nanjing Fiberglass Research and Design Institute Co., Ltd.'s high-strength HS fiberglass yarn fabric SWV220B-90b, high-strength HS fiberglass yarn fabric SW220C-100b, high-strength HS fiberglass roving fabric SWR400, or high-strength HS fiberglass roving fabric BIAX350.

[0034] The prepreg is made from the following raw materials in parts by weight: 100-120 parts unsaturated polyester composition, 40-60 parts reactive diluent, 5-10 parts TPU filament aggregate, 20-40 parts filler composition, 0.05-0.20 parts defoamer, 0.5-2.5 parts adhesion promoter, 0.6-1.2 parts leveling agent, 0.4-0.8 parts polymerization inhibitor, 1-2 parts thermal initiator, and 1-5 parts TMI end-capping crosslinking agent.

[0035] The unsaturated polyester composition is formulated by compounding bisphenol A type unsaturated polyester resin and / or terephthalic type unsaturated polyester resin with at least one of isophthalic type unsaturated polyester resin and orthophthalic type unsaturated polyester resin.

[0036] The reactive diluent is at least one of o-phenylphenoxyethyl acrylate, 2-hydroxyethyl methacrylate diphenyl phosphate, bisphenol A glycerol dimethacrylate, and bisphenol A ethoxy acid diacrylate.

[0037] TPU filament aggregate is composed of the following raw materials by weight percentage: 10-30% TPU filaments with a diameter of 0.10-38 mm and a length of 1.0±0.1 mm, 15-35% TPU filaments with a diameter of 0.10-38 mm and a length of 2.5±0.25 mm, and the balance being TPU filaments with a diameter of 0.10-38 mm and a length of 5.0±0.5 mm.

[0038] The TMI end-capping crosslinking agent is mainly prepared from phthalic anhydride polyester polyol and 3-isopropyl-dimethylbenzyl isocyanate (TMI) at a molar ratio of 1.00:(0.99-1.00). The hydroxyl value of the phthalic anhydride polyester polyol is 160-460 mgKOH / g. Specifically, the preferred phthalic anhydride polyester polyol is PE-D504 from Shandong Yinuowei Polyurethane Co., Ltd., with a hydroxyl value of 400-460 mgKOH / g, or PE-B230, with a hydroxyl value of 230-260 mgKOH / g.

[0039] The filler composition comprises the following raw materials in parts by weight: 1.5-3.0 parts of anti-yellowing agent, 0.4-1.0 parts of antibacterial agent, 0.5-3.0 parts of thixotropic agent, and 15-30 parts of synthetic fluorophlogopite powder. The anti-yellowing agent is at least one of nano-titanium nitride and hindered amine light stabilizers. The antibacterial agent is at least one of nano-titanium oxynitride and nano-titanium dioxide. The thixotropic agent is at least one of nano-magnesium oxide and nano-fumed silica.

[0040] The defoamer is at least one of BYK-A500 and BYK-A555.

[0041] The adhesion promoter is at least one of aminosilane KH792 and H-609 adhesion promoters.

[0042] The leveling agent is HR-6056 polyester leveling agent.

[0043] The polymerization inhibitor is p-hydroxyanisole MEHQ.

[0044] The thermal initiator is at least one of benzoyl peroxide (BPO) and azobisisobutyronitrile (AIBN), or the thermal initiator is a cyclohexanone peroxide-cobalt naphthenate system, which can be customized according to the application requirements.

[0045] A high-strength water supply pipe made using fiberglass prepreg tape includes a plastic inner tube, a PET film laminated to the outer wall of the plastic inner tube, and a CIPP repair outer layer formed on the PET film by thermosetting the fiberglass prepreg tape. A corona layer is formed on the outer wall of the plastic inner tube. The PET film is laminated to the corona layer on the plastic outer wall by hot pressing or hot melt adhesive, which improves the interfacial adhesion stability between the PET film and the plastic inner tube. An interface modification layer is formed on the surface of the PET film facing away from the plastic inner tube through low-temperature plasma treatment. An aminosilane modification liquid is coated onto the surface of the interface modification layer by scraping or spin coating, followed by drying and thermosetting to form an aminosilane active crosslinking layer. The aminosilane active crosslinking layer laminated to the PET film by the CIPP repair outer layer improves the interfacial adhesion stability between the CIPP repair outer layer and the PET film, thereby improving the service life, weather resistance, and mechanical properties of the prepared high-strength water supply pipe.

[0046] Preparation Example 1: The preparation method of TMI end-capping crosslinking agent is as follows: Step 1: Weigh 47.22g of phthalic anhydride polyester polyol PE-B230 (measured hydroxyl value of 242.5mgKOH / g) and place it in a reaction vessel. Heat to 120℃ and vacuum dry for 2.0h. Then, purge with nitrogen to restore normal pressure and adjust the temperature to 85℃. Meanwhile, 20.74g of 3-isopropyl-dimethylbenzyl isocyanate TMI (CAS: 2094-99-7, Beijing Bailingwei Technology Co., Ltd., purity 97%) was mixed evenly with 30g of acetone to obtain TMI acetone solution; Step 2: Under the conditions of stirring speed of 240 rpm and 85°C, add 0.002 g of dibutyltin dilaurate (CAS: 77-58-7, Shandong Xiya Chemical Co., Ltd., AR grade) to the reactor. After stirring for 3 min, add TMI acetone solution to the reactor dropwise at a rate of 0.2 g / min. After the TMI acetone solution is added, continue to react for 0.5 h under the conditions of stirring speed of 240 rpm and 85°C. Take a sample to test the -NCO content of the liquid in the reactor. The -NCO content is detected by the di-n-butylamine method (using the reaction of isocyanate with excess di-n-butylamine to produce urea, and then using hydrochloric acid to titrate the excess di-n-butylamine to quantitatively calculate the isocyanate content). The measured -NCO content of the liquid in the reactor is 0. Then, remove the acetone by vacuum distillation, cool to room temperature and discharge to obtain TMI end-capping crosslinking agent.

[0047] Preparation Example 2: The preparation method of TMI end-capping crosslinking agent is as follows: Step 1: Weigh 25.12g of phthalic anhydride polyester polyol PE-D504 (measured hydroxyl value 446.7mgKOH / g) and place it in a reaction vessel. Heat to 120℃ and vacuum dry for 2.0h. Then, purge with nitrogen to restore normal pressure and adjust the temperature to 85℃. Meanwhile, 20.74g of 3-isopropyl-dimethylbenzyl isocyanate TMI (CAS: 2094-99-7, Beijing Bailingwei Technology Co., Ltd., purity 97%) was mixed evenly with 30g of acetone to obtain TMI acetone solution; Step 2: Under the conditions of stirring speed of 240 rpm and 85°C, add 0.002 g of dibutyltin dilaurate (CAS: 77-58-7, Shandong Xiya Chemical Co., Ltd., AR grade) to the reactor. After stirring for 3 min, add TMI acetone solution to the reactor dropwise at a rate of 0.2 g / min. After the TMI acetone solution is added, continue to react for 0.5 h under the conditions of stirring speed of 240 rpm and 85°C. Take a sample to test the -NCO content of the liquid in the reactor. The -NCO content is detected by the di-n-butylamine method (using the reaction of isocyanate with excess di-n-butylamine to produce urea, and then using hydrochloric acid to titrate the excess di-n-butylamine to quantitatively calculate the isocyanate content). The measured -NCO content of the liquid in the reactor is 0. Then, remove the acetone by vacuum distillation, cool to room temperature and discharge to obtain TMI end-capping crosslinking agent.

[0048] Example 1: A fiberglass prepreg tape includes prepreg and fiberglass fabric, wherein the prepreg accounts for 40.2 wt% of the total mass of the fiberglass prepreg tape. The fiberglass fabric has a thickness of 0.21 mm and a basis weight of 240 g / m. 2 The fabric has a twill weave structure and is specifically made of high-strength HS glass fiber yarn fabric SWV220B-90b from Nanjing Glass Fiber Research and Design Institute Co., Ltd.

[0049] The prepreg is made from the following parts by weight of raw materials: 60 parts of bisphenol A type unsaturated polyester resin 3301A (Jinan Zian Chemical Co., Ltd.), 15 parts of orthophthalic type unsaturated polyester resin MERICAN 9016L (East China University of Science and Technology Huachang Polymer Co., Ltd.), and 25 parts of isophthalic type unsaturated polyester resin MERICAN. 9516N (East China University of Science and Technology Huachang Polymer Co., Ltd.), 15 parts o-phenylphenoxyethyl acrylate (Shanghai Changyan Chemical Technology Co., Ltd.), 5 parts diphenyl 2-hydroxyethyl acrylate (Shaanxi Xihua Chemical Industry Co., Ltd.), 30 parts bisphenol A glycerol dimethacrylate (Chengdu Yuanda Chemical Co., Ltd.), 0.9 parts TPU filament with a diameter of 0.30 mm and a length of 1.0 mm, 1.8 parts TPU filament with a diameter of 0.2 mm and a length of 2.5 mm, 3.3 parts TPU filament with a diameter of 0.30 mm and a length of 5.0 mm, 1.6 parts nano titanium nitride CW-TiN-003 with an average particle size of 700 nm (Shanghai Chaowei Nanotechnology Co., Ltd.), 0.6 parts nano titanium oxynitride C with an average particle size of 30 nm. W-TiON-001 (Shanghai Chaowei Nanotechnology Co., Ltd.), 2.0 parts of nano-magnesium oxide CW-MgO-001 with an average particle size of 50 nm (Shanghai Chaowei Nanotechnology Co., Ltd.), 22.5 parts of synthetic fluorophlogopite powder Y-10 with an average particle size of 10 μm (Lingshou County Malin Mineral Products Processing Plant), 0.10 parts of defoamer BYK-A555 (Shanghai Puhao Chemical Co., Ltd.), 2.0 parts of adhesion promoter H-609 (Jining Tangyi Chemical Co., Ltd.), 1.0 part of HR-6056 polyester leveling agent (Tai'er F100, Dongguan Hongrui Chemical Co., Ltd.), 0.6 parts of p-hydroxyanisole MEHQ, 1.6 parts of benzoyl peroxide BPO, and 2 parts of the TMI end-capping crosslinking agent synthesized in Preparation Example 1.

[0050] The TPU filament aggregate is prepared as follows: Crystal Tec KOREA 0.30mm diameter TPU elastic yarn is cut into 1.0mm long TPU filaments, 2.5mm long TPU filaments, and 5.0mm long TPU filaments. The resulting 0.30mm diameter and 1.0mm long TPU filaments, 0.2mm diameter and 2.5mm long TPU filaments, and 0.30mm diameter and 5.0mm long TPU filaments are then mixed in a mass ratio of 15:30:55 to obtain the TPU filament aggregate.

[0051] A method for preparing a glass fiber prepreg tape includes the following steps: Step 1, the preparation method of the prepreg is as follows: 60 parts of bisphenol A type unsaturated polyester resin 3301A, 15 parts of orthophthalic type unsaturated polyester resin MERICAN 9016L, 25 parts of isophthalic type unsaturated polyester resin MERICAN 9516N, 15 parts of o-phenylphenoxyethyl acrylate, 5 parts of diphenyl 2-hydroxyethyl phosphate, 30 parts of bisphenol A glycerol dimethacrylate, and 0.6 parts of p-hydroxyanisole MEHQ are placed in a reaction vessel and mixed and stirred at 240 rpm for 8 minutes under nitrogen protection; then 0.9 parts of TPU filament with a diameter of 0.30 mm and a length of 1.0 mm, 1.8 parts of TPU filament with a diameter of 0.2 mm and a length of 2.5 mm, 3.3 parts of TPU filament with a diameter of 0.30 mm and a length of 5.0 mm, and 1.6 parts of... The following materials were prepared: 700 nm nano-titanium nitride CW-TiN-003, 0.6 parts of 30 nm nano-titanium oxynitride CW-TiON-001, 2.0 parts of 50 nm nano-magnesium oxide CW-MgO-001, 22.5 parts of 10 μm synthetic fluorophlogopite powder Y-10, 0.10 parts of defoamer BYK-A555, 2.0 parts of adhesion promoter H-609, and 1.0 part of HR-6056 polyester leveling agent. The mixture was stirred at 240 rpm for 15 min under nitrogen protection, followed by vacuum defoaming for 30 min. Nitrogen gas was then introduced to restore atmospheric pressure, and the temperature was adjusted to 0 °C in an ice-water bath. 1.6 parts of benzoyl peroxide BPO and 2 parts of the TMI end-capping crosslinking agent synthesized in Preparation Example 1 were added. The mixture was stirred at 240 rpm for 8 min under nitrogen protection, and the prepreg was obtained by discharging. Step 2: Lay release paper at the bottom of the molding mold. The molding mold is 100cm long, 100cm wide, and 0.50mm deep. Place the high-strength HS glass fiber yarn fabric SWV220B-90b in the molding mold, add 161.3g of the prepreg prepared in Step 1 into the molding mold, shake and flatten it, then lay the release paper. Cover the molding mold with a pressure plate (100cm long, 100cm wide, and 2.0mm deep), pressing down to a depth of 0.29mm. Keep it at 45℃ for 30 minutes to allow the prepreg to change from a viscous flow state to a gel state. Demold to obtain a glass fiber prepreg tape with release paper on both the upper and lower surfaces.

[0052] In use, the fiberglass prepreg tape is cut and processed according to the diameter of the pipe to be repaired. Then, the fiberglass prepreg tape of the predetermined size is wrapped around the pipe to be repaired. A thermoforming mold is then installed on the outer wall of the pipe covered with multiple layers of fiberglass prepreg tape. The pipe is then heat-cured at 120°C for 100 minutes, cooled to room temperature, and demolded to form a CIPP hardened repair layer at the damaged area of ​​the pipe to be repaired.

[0053] Simulated repair test: Two 250mm long DN1200PN10 PP pipes were used as the modification objects. The two ends of the PP pipes were spliced ​​together. Nine turns of 200mm long fiberglass prepreg tape were wrapped around the splice of the PP pipes. A thermoforming mold with an inner diameter of 1201.89mm was then installed and thermo-cured at 120℃ for 100min. After cooling to room temperature, the repaired pipe fitting was obtained by demolding.

[0054] In Example 1, the pressure resistance test of the repair pipe fitting was performed: no leakage was observed after 24 hours of operation at 1.5 MPa. The repair pipe fitting was then placed in an aging test chamber for simulated aging, undergoing aging treatment at 85℃ / 80RH% for 1000 hours before a pressure resistance test was conducted. No leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was performed on the repair pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Test". No abnormalities were observed in the repair pipe fitting under a breaking tensile force of 55 kN, indicating that the fiberglass prepreg tape in this invention, when used to repair damaged PP pipes, can effectively extend the service life of plastic pipes and reduce pipe maintenance costs.

[0055] The difference between Example 2 and Example 1 is that 2 parts of the TMI end-capping crosslinking agent synthesized in Preparation Example 1 were replaced with 2 parts of the TMI end-capping crosslinking agent synthesized in Preparation Example 2, while the other components remained unchanged.

[0056] In Example 2, the pressure resistance test of the repaired pipe fitting was conducted: no leakage was observed after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was then placed in an aging test chamber for simulated aging, undergoing aging treatment at 85℃ / 80RH% for 1000 hours before a pressure resistance test was performed; no leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was conducted on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Tests," and no abnormalities were observed at a breaking tensile force of 58 kN.

[0057] The difference between Example 3 and Example 1 is that the prepreg accounts for 45.7 wt% of the total mass of the fiberglass prepreg tape. The fiberglass fabric thickness is 0.40 mm, and the basis weight is 400 g / m. 2 The fabric has a plain weave checkered pattern, specifically high-strength HS glass fiber roving fabric SWR400 from Nanjing Glass Fiber Research and Design Institute Co., Ltd.

[0058] The difference in the preparation method of a glass fiber prepreg tape is as follows: In step two, release paper is laid at the bottom of the molding mold. The molding mold is 100cm long, 100cm wide, and 0.50mm deep. High-strength HS glass fiber yarn fabric SWR400 is placed in the molding mold. 336.8g of the prepreg prepared in step one is added to the molding mold. After shaking and flattening, release paper is laid. A pressure plate (100cm long, 100cm wide, and 2.0mm deep) is added to the molding mold and pressed down to a depth of 0.10mm. The mold is then kept at 45℃ for 30 minutes to allow the prepreg to change from a viscous flow state to a gel state. After demolding, a glass fiber prepreg tape with release paper on both the upper and lower surfaces is obtained.

[0059] Simulated repair test: Two 250mm long DN1200PN10 PP pipes were used as the modification objects. The two ends of the PP pipes were spliced ​​together. Five turns of 200mm long fiberglass prepreg tape were wrapped around the splice of the PP pipes. A thermoforming mold with an inner diameter of 1202.0mm was then installed and thermo-cured at 120℃ for 100min. After cooling to room temperature, the repaired pipe fitting was obtained by demolding.

[0060] In Example 3, the pressure resistance test of the repaired pipe fitting was performed: no leakage was observed after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was then placed in an aging test chamber for simulated aging, undergoing aging treatment at 85℃ / 80RH% for 1000 hours before a pressure resistance test was conducted; no leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was performed on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Tests," and no abnormalities were observed at a breaking tensile force of 56 kN.

[0061] The difference between Example 4 and Example 1 is that the prepreg accounts for 48.4 wt% of the total mass of the fiberglass prepreg tape. The fiberglass fabric thickness is 0.45 mm, and the basis weight is 420 g / m. 2 The fabric has a satin weave structure, specifically the 3732 plain fiberglass fabric from Jiangxi Dahua Fiberglass Group Co., Ltd.

[0062] Simulated repair test: Two 250mm long DN1200PN10 PP pipes were used as the modification objects. The two ends of the PP pipes were spliced ​​together. Four turns of 200mm long fiberglass prepreg tape were wrapped around the splice of the PP pipes. A thermoforming mold with an inner diameter of 1201.80mm was then installed and thermo-cured at 120℃ for 100min. After cooling to room temperature, the repaired pipe fittings for the test were obtained by demolding.

[0063] In Example 4, the pressure resistance test of the repaired pipe fitting was conducted: no leakage was observed after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was then placed in an aging test chamber for simulated aging, undergoing aging treatment at 85℃ / 80RH% for 1000 hours before a pressure resistance test was performed; no leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was conducted on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Tests," and no abnormalities were observed at a breaking tensile force of 48 kN.

[0064] The difference in the preparation method of a glass fiber prepreg tape is as follows: In step two, release paper is laid at the bottom of the molding mold. The molding mold is 100cm long, 100cm wide, and 0.50mm deep. Glass fiber plain weave fabric 3732 is placed in the molding mold. 447.8g of the prepreg prepared in step one is added to the molding mold. After shaking and flattening, release paper is laid. A pressure plate (100cm long, 100cm wide, and 2.0mm deep) is added to the molding mold and pressed down to a depth of 0.05mm. The mold is then kept at 45℃ for 30 minutes to allow the prepreg to change from a viscous flow state to a gel state. After demolding, a glass fiber prepreg tape with release paper laminated on both the upper and lower surfaces is obtained.

[0065] The difference between Example 5 and Example 1 is that the prepreg is made from the following raw materials in parts by weight: 55 parts bisphenol A type unsaturated polyester resin 3301A, 15 parts phthalic unsaturated polyester resin MERICAN 9016L, 15 parts isophthalic unsaturated polyester resin MERICAN 9516N, 15 parts terephthalic unsaturated polyester resin MERICAN 9505 (East China University of Science and Technology Huachang Polymer Co., Ltd.), 15 parts o-phenylphenoxyethyl acrylate, 5 parts diphenyl 2-hydroxyethyl phosphate, 30 parts bisphenol A glycerol dimethacrylate, 0.9 parts TPU filament with a diameter of 0.30 mm and a length of 1.0 mm, 1.8 parts TPU filament with a diameter of 0.2 mm and a length of 2.5 mm, 3.3 parts TPU filament with a diameter of 0.30 mm and a length of 5.0 mm, 1.6 parts nano-titanium nitride CW-TiN-003 with an average particle size of 700 nm, and 0.6 parts... The following components were prepared: 30 nm average particle size nano-titanium oxynitride CW-TiON-001, 2.0 parts average particle size 50 nm nano-magnesium oxide CW-MgO-001, 22.5 parts average particle size 10 μm synthetic fluorophlogopite powder Y-10, 0.10 parts defoamer BYK-A555, 2.0 parts adhesion promoter H-609, 1.0 part HR-6056 polyester leveling agent, 0.6 parts p-hydroxyanisole MEHQ, 1.6 parts benzoyl peroxide BPO, and 2 parts TMI end-capping crosslinking agent synthesized in Preparation Example 1.

[0066] In Example 5, the pressure resistance test of the repaired pipe fitting was conducted: no leakage was observed after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was then placed in an aging test chamber for simulated aging, undergoing aging treatment at 85℃ / 80RH% for 1000 hours before a pressure resistance test was performed; no leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was conducted on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Tests," and no abnormalities were observed at a breaking tensile force of 56 kN.

[0067] The difference between Comparative Example 1 and Example 1 is that 50 parts of reactive diluent (15 parts of o-phenylphenoxyethyl acrylate, 5 parts of 2-hydroxyethyl acrylate diphenyl phosphate, and 30 parts of bisphenol A glycerol dimethacrylate) were replaced with 50 parts of conventional styrene, while the other components remained unchanged.

[0068] The pressure resistance test of the repaired pipe fitting in Comparative Example 1 showed no leakage after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was placed in an aging test chamber for simulated aging, and after aging at 85℃ / 80RH% for 1000 hours, a pressure resistance test was conducted; no leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was performed on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Test Specification for Axial Tensile Properties," and no abnormalities were observed under a breaking tensile force of 50 kN. Combining Example 1 and Comparative Example 1 with Table 1, it can be seen that replacing styrene with an active diluent composed of 15 parts of o-phenylphenoxyethyl acrylate, 5 parts of diphenyl 2-hydroxyethyl phosphate, and 30 parts of bisphenol A glycerol dimethacrylate gives Example 1 better environmental performance. Furthermore, the flexural strength and compressive strength of Example 1 are similar to those of Comparative Example 1, and Example 1 exhibits better dimensional stability, impact strength, and corrosion resistance.

[0069] The difference between Comparative Example 2 and Example 1 is that 6 parts of TPU filament aggregate (0.9 parts of TPU filament with a diameter of 0.30 mm and a length of 1.0 mm, 1.8 parts of TPU filament with a diameter of 0.2 mm and a length of 2.5 mm, and 3.3 parts of TPU filament with a diameter of 0.30 mm and a length of 5.0 mm) were replaced with 6 parts of BASF 1190A (powder) from Germany, while the other components remained unchanged.

[0070] The pressure resistance test of the repaired pipe fitting in Comparative Example 2 showed no leakage after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was placed in an aging test chamber for simulated aging, and after aging at 85℃ / 80RH% for 1000 hours, a pressure resistance test was conducted; no leakage was observed after 24 hours of operation at 1.5 MPa. A tensile test was performed on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Test Specification for Axial Tensile Properties," and no abnormalities were observed at a breaking tensile force of 47 kN. Combining Example 1 and Comparative Example 2 with Table 1, it can be seen that 0.9 parts of TPU filament with a diameter of 0.30 mm and a length of 1.0 mm, 1.8 parts of TPU filament with a diameter of 0.2 mm and a length of 2.5 mm, and 3.3 parts of TPU filament with a diameter of 0.30 mm and a length of 5.0 mm constitute the TPU filament aggregate, which can better improve the dimensional stability and impact strength of fiber-reinforced plastics.

[0071] The difference between Comparative Example 3 and Example 1 is that the 2 parts of TMI end-capping crosslinking agent in Preparation Example 1 were replaced with 2 parts of 1,3,5-triallyl cyanurate (CAS: 101-37-1, Shandong Xiya Chemical Co., Ltd.).

[0072] In Comparative Example 3, the pressure resistance test of the repaired pipe fitting showed no leakage after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was placed in an aging test chamber for simulated aging, and after aging at 85℃ / 80RH% for 1000 hours, a pressure resistance test was conducted. No leakage was observed after 24 hours of operation at 1.5 MPa. Tensile testing was performed on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Properties". The repaired pipe fitting showed no abnormalities at a breaking tensile force of 45 kN, but its brittleness increased significantly, making it more susceptible to tensile failure.

[0073] Based on Examples 1-2 and Comparative Example 3, and in conjunction with Table 1, it can be seen that, compared with the conventional crosslinking agent - 1,3,5-triallyl cyanurate, the self-made TMI end-capping crosslinking agent used in this invention has both soft and hard segments, which can better improve the dimensional stability, impact strength, and corrosion resistance of fiber-reinforced plastics.

[0074] The difference between Comparative Example 4 and Example 1 is that 26.7 parts of the filler composition (1.6 parts of nano-titanium nitride CW-TiN-003 with an average particle size of 700 nm, 0.6 parts of nano-titanium oxynitride CW-TiON-001 with an average particle size of 30 nm, 2.0 parts of nano-magnesium oxide CW-MgO-001 with an average particle size of 50 nm, and 22.5 parts of synthetic fluorophlogopite powder Y-10 with an average particle size of 10 μm) were replaced with 26.7 parts of ultrafine calcium carbonate ML-CaCO3-WO5 (Zhejiang Manli Nanotechnology Co., Ltd.).

[0075] Pressure resistance test of the repaired pipe fitting in Comparative Example 4: No leakage after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was placed in an aging test chamber for simulated aging. After aging at 85℃ / 80RH% for 1000 hours, a pressure resistance test was conducted. No leakage was observed after 24 hours of operation at 1.0 MPa, but leakage occurred after 24 hours of operation at 1.5 MPa. The filler system provided in this invention can improve the quality of pipe repair. Tensile testing was performed on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Test". The repaired pipe fitting showed no abnormalities at a breaking tensile force of 42 kN, but its mechanical properties decreased significantly, making it more susceptible to tensile failure.

[0076] As can be seen from Example 1 and Comparative Example 4, and Table 1, the filler composition of the present invention can improve the mechanical properties, dimensional stability, impact strength, and chemical corrosion resistance of fiber-reinforced plastics.

[0077] The difference between Comparative Example 5 and Example 1 is that the prepreg was made from the following parts by weight of raw materials: 100 parts of phthalic unsaturated polyester resin MERICAN 9016L, 50 parts of styrene, 6 parts of BASF 1190A (powder), 26.7 parts of ultrafine calcium carbonate ML-CaCO3-WO5 (Zhejiang Manli Nanotechnology Co., Ltd.), 0.10 parts of defoamer BYK-A555, 2.0 parts of adhesion promoter-KH792 (CAS: 1760-24-3, Nanjing Chemical Reagent Co., Ltd.), 1.0 part of HR-6056 polyester leveling agent, 0.6 parts of p-hydroxyanisole MEHQ, 1.6 parts of benzoyl peroxide BPO, and 2 parts of 1,3,5-triallyl cyanurate.

[0078] A method for preparing a glass fiber prepreg tape includes the following steps: Step 1: The preparation method of the prepreg is as follows: 100 parts of phthalic unsaturated polyester resin MERICAN 9016L, 50 parts of styrene, and 0.6 parts of p-hydroxyanisole MEHQ are placed in a reactor and mixed and stirred at 240 rpm for 8 minutes under nitrogen protection. Then, 6 parts of BASF 1190A (powder), 26.7 parts of ultrafine calcium carbonate ML-CaCO3-WO5, 0.10 parts of defoamer BYK-A555, 2.0 parts of adhesion promoter-KH792, and 1.0 part of HR-6056 polyester leveling agent are added and mixed and stirred at 240 rpm for 15 minutes under nitrogen protection. Then, vacuum defoaming treatment for 30 minutes was performed, nitrogen was introduced to restore normal pressure, the temperature was adjusted to 0℃ in an ice-water bath, 1.6 parts of benzoyl peroxide BPO and 2 parts of 1,3,5-triallyl cyanurate synthesized in Preparation Example 1 were added, and the mixture was stirred at 240 rpm for 8 minutes under nitrogen protection. The prepreg was then discharged. Step 2: Lay release paper at the bottom of the molding mold. The molding mold is 100cm long, 100cm wide, and 0.50mm deep. Place the high-strength HS glass fiber yarn fabric SWV220B-90b in the molding mold, add 161.3g of the prepreg prepared in Step 1 into the molding mold, shake and flatten it, then lay the release paper. Cover the molding mold with a pressure plate (100cm long, 100cm wide, and 2.0mm deep), pressing down to a depth of 0.29mm. Keep it at 45℃ for 40 minutes to allow the prepreg to change from a viscous flow state to a gel state. Demold to obtain a glass fiber prepreg tape with release paper on both the upper and lower surfaces.

[0079] In Comparative Example 5, the pressure resistance test of the repaired pipe fitting showed no leakage after 24 hours of operation at 1.5 MPa. The repaired pipe fitting was then placed in an aging test chamber for simulated aging. After aging at 85℃ / 80% RH for 1000 hours, a pressure resistance test was conducted. Leakage occurred after 24 hours of operation at 1.5 MPa. A tensile test was performed on the repaired pipe fitting according to SJJ / TSI-ZJ-08-15 "Specification for Axial Tensile Performance Test". The repaired pipe fitting showed no abnormalities at a breaking tensile force of 38 kN, but its mechanical properties decreased significantly, making it more susceptible to tensile failure.

[0080] As can be seen from Example 1 and Comparative Example 5, and Table 1, compared with existing fiber-reinforced plastics, the fiber-reinforced plastic of the present invention has better mechanical properties, dimensional stability, impact strength, and corrosion resistance. When used for trenchless repair of plastic pipes, it can effectively extend the service life of the pipes and reduce maintenance costs.

[0081] Performance testing: 1. The bending strength of the fiber-reinforced plastics prepared using the glass fiber prepreg tapes in Examples 1-5 and Comparative Examples 1-5 was determined according to the three-point bending test method in GB / T 1449-2005 "Test Method for Bending Properties of Fiber Reinforced Plastics". The test speed was set to 2.0 mm / min.

[0082] 2. The impact strength of the glass fiber reinforced thermosetting materials prepared using glass fiber prepreg tapes in Examples 1-5 and Comparative Examples 1-5 was determined according to GB / T 1451-2005 "Test Method for Impact Toughness of Fiber Reinforced Plastics in Simply Supported Beams". The sample preparation complied with the requirements of 4.1.1 in GB / T 1446-2005.

[0083] 3. The Barcol hardness of the fiber-reinforced plastics prepared using the glass fiber prepreg tapes in Examples 1-5 and Comparative Examples 1-5 was determined according to GB / T 3854-2005 "Barcol Hardness Test Method for Reinforced Plastics". Five groups of test samples were used, and the average value was taken as the Barcol hardness of the fiber-reinforced plastic.

[0084] 4. The longitudinal tensile strength of the fiber-reinforced plastics prepared using the glass fiber prepreg tapes in Examples 1-5 and Comparative Examples 1-5 was determined according to GB / T 1040.4-2006 "Determination of tensile properties of plastics - Part 4: Test conditions for isotropic and orthotropic fiber-reinforced composites". The sample width was 25 mm and the length was 300 mm.

[0085] 5. The curing shrinkage of the fiber-reinforced plastics prepared using the glass fiber prepreg tapes in Examples 1-5 and Comparative Examples 1-5 was tested according to GB / T 24148.9-2014 "Plastics Unsaturated Polyester Resins (UP-R) Part 9: Determination of Total Volume Shrinkage".

[0086] 6. The flexural strength retention rate Q of the fiber-reinforced plastics prepared using the glass fiber prepreg tapes in Examples 1-5 and Comparative Examples 1-5 was tested according to GB / T 3857-2017 "Test Method for Chemical Resistance of Glass Fiber Reinforced Thermosetting Plastics".

[0087] Table 1: Test parameters of fiber-reinforced plastics in Examples 1-5 and Comparative Examples 1-5 Furthermore, the fiberglass prepreg tape in Examples 1-5 can be used in the manufacture of water supply pipes. Specifically, a high-strength water supply pipe prepared using fiberglass prepreg tape includes a plastic inner tube, a PET film laminated to the outer wall of the plastic inner tube, and a CIPP repair outer layer formed by thermosetting the aforementioned fiberglass prepreg tape onto the PET film. The plastic inner tube is a PP plastic inner tube with an outer diameter of 32 mm and a wall thickness of 3.6 mm. The outer wall of the PP plastic inner tube is corona treated to form a corona layer. Then, a PET film with a film thickness of 150 μm is laminated to the corona layer of the PP plastic inner tube by hot pressing. Before use, the PET film undergoes surface modification treatment. The surface of the PET film facing away from the plastic inner tube is treated with low-temperature plasma to form an interface modification layer. The low-temperature plasma treatment parameters are: nitrogen as the plasma source, temperature 4°C, and treatment time 15 min. An aminosilane modified solution was coated onto the surface of the PET film's interface modification layer, followed by drying and heat curing to form an aminosilane active crosslinking layer. The aminosilane modified solution was a 5 wt% KH550 ethanol aqueous solution with an anhydrous ethanol to water mass ratio of 9:1. Glacial acetic acid was added to adjust the pH of the KH550 ethanol aqueous solution to 4.0. The coating amount was 15 g / m³. 2The drying temperature is 80℃, the drying time is 60 min, the curing temperature is 120℃, and the curing treatment is 15 min, which forms an aminosilane active crosslinking layer on the surface of the interface modification layer of the PET film. Finally, the cut glass fiber prepreg tape is wrapped around the outer wall of the PP plastic inner tube of the hot-pressed composite PET film, and a thermoforming mold is installed. It is then heat-cured at 120℃ for 45 min, cooled to room temperature, and demolded. This heat-cured CIPP hardened repair layer forms on the outer wall of the PP plastic inner tube of the hot-pressed composite PET film. The CIPP repair outer layer is composited with the aminosilane active crosslinking layer of the PET film, which can improve the interfacial adhesion stability between the CIPP repair outer layer and the PET film, thereby improving the service life, weather resistance, and mechanical properties of the prepared high-strength water supply pipe.

[0088] In summary, the fiberglass prepreg tape of this invention is used for trenchless repair of plastic pipes. The repair outer layer formed by the thermosetting of the fiberglass prepreg tape has good dimensional stability, impact strength, corrosion resistance, and adhesion stability, which can effectively extend the service life of plastic pipes and reduce pipe maintenance costs. Furthermore, the fiberglass prepreg tape of this invention can be used to produce water supply pipes, which exhibit excellent mechanical properties, adhesion stability, dimensional stability, impact strength, corrosion resistance, and weather resistance.

[0089] It should be noted that this specific embodiment is merely an explanation of the technical solution of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A glass fiber prepreg tape, characterized in that: The product includes a prepreg and a fiberglass fabric, wherein the prepreg accounts for 30-50 wt% of the total mass of the fiberglass prepreg tape; the prepreg is made from the following raw materials in parts by weight: 100-120 parts of unsaturated polyester composition, 40-60 parts of reactive diluent, 5-10 parts of TPU filament aggregate, 20-40 parts of filler composition, 0.05-0.20 parts of defoamer, 0.5-2.5 parts of adhesion promoter, 0.6-1.2 parts of leveling agent, 0.4-0.8 parts of polymerization inhibitor, 1-2 parts of thermal initiator, and 1-5 parts of TMI end-capping crosslinking agent.

2. The fiberglass prepreg tape according to claim 1, characterized in that: The fiberglass fabric has a thickness of 0.18-0.50 mm and a weight of 180-500 g / m². 2 The weave structure is plain weave, twill weave, or satin weave.

3. The fiberglass prepreg tape according to claim 1, characterized in that: The unsaturated polyester composition is formulated by compounding bisphenol A type unsaturated polyester resin and / or terephthalic type unsaturated polyester resin with at least one of isophthalic type unsaturated polyester resin and orthophthalic type unsaturated polyester resin.

4. The fiberglass prepreg tape according to claim 3, characterized in that: The unsaturated polyester composition comprises the following raw materials in weight percentages: 50-70% bisphenol A type unsaturated polyester resin, 10-25% orthophthalic type unsaturated polyester resin, and the balance being isophthalic type unsaturated polyester resin.

5. The fiberglass prepreg tape according to claim 1, characterized in that: The reactive diluent is one or more of o-phenylphenoxyethyl acrylate, 2-hydroxyethyl methacrylate diphenyl phosphate, bisphenol A glycerol dimethacrylate, and bisphenol A ethoxy acid diacrylate.

6. The fiberglass prepreg tape according to claim 4, characterized in that: The reactive diluent is composed of the following raw materials in weight percentage: 10-25% o-phenylphenoxyethyl acrylate, 50-70% bisphenol A glycerol dimethacrylate, and the balance being diphenyl methacrylate-2-hydroxyethyl phosphate.

7. The fiberglass prepreg tape according to claim 1, characterized in that: The TPU filament aggregate is composed of the following raw materials in the following mass percentages: 10-30% TPU filaments with a diameter of 0.10-38 mm and a length of 1.0±0.1 mm, 15-35% TPU filaments with a diameter of 0.10-38 mm and a length of 2.5±0.25 mm, and the balance being TPU filaments with a diameter of 0.10-38 mm and a length of 5.0±0.5 mm.

8. The fiberglass prepreg tape according to claim 1, characterized in that: The TMI end-capping crosslinking agent is mainly prepared by phthalic anhydride polyester polyol and 3-isopropyl-dimethylbenzyl isocyanate TMI in a molar ratio of 1.00:(0.99-1.00); the hydroxyl value of the phthalic anhydride polyester polyol is 160-460 mgKOH / g.

9. A glass fiber prepreg tape according to claim 1, characterized in that: The filler composition comprises the following raw materials in parts by weight: 1.5-3.0 parts of anti-yellowing agent, 0.4-1.0 parts of antibacterial agent, 0.5-3.0 parts of thixotropic agent, and 15-30 parts of synthetic fluorophlogopite powder; wherein the anti-yellowing agent is at least one of nano-titanium nitride and hindered amine light stabilizer; wherein the antibacterial agent is at least one of nano-titanium oxynitride and nano-titanium dioxide; and wherein the thixotropic agent is at least one of nano-magnesium oxide and nano-fumed silica.

10. A high-strength water supply pipe prepared using the fiberglass prepreg tape according to any one of claims 1-9, characterized in that: The high-strength water supply pipe includes a plastic inner tube, a PET film laminated to the outer wall of the plastic inner tube, and a CIPP repair outer layer formed on the PET film by thermosetting the glass fiber prepreg tape as described in any one of claims 1-9; a corona layer is formed on the outer wall of the plastic inner tube, and the PET film is laminated to the corona layer on the plastic outer wall by hot pressing or hot melt adhesive; an interface modification layer is formed on the surface of the PET film facing away from the plastic inner tube by low-temperature plasma treatment; an aminosilane active crosslinking layer is formed on the surface of the interface modification layer by scraping or spin coating with an aminosilane modification liquid, followed by drying and thermosetting; the CIPP repair outer layer is laminated to the aminosilane active crosslinking layer of the PET film.

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