Inflatable floating bridge high-pressure air rib external weaving tube material and preparation method thereof

Abstract

The invention relates to the technical field of fibers, and discloses an inflatable floating bridge high-pressure air rib external weaving tube material and a preparation method thereof. The external weaving pipe material is formed by weaving one or more of polyester composite fibers and basalt fibers; the preparation method comprises the following steps: mixing polyethylene glycol terephthalate, polyethylene resin, polyvinyl benzoate and an antioxidant, spinning, and stretching to obtain the polyester composite fiber. The polyvinyl benzoate improves the compatibility between polyethylene glycol terephthalate and polyethylene, and the composite fiber has very high breaking strength and breaking elongation, and has the strength of polyester fiber and the toughness of polyethylene fiber. The polyester composite fiber and the basalt fiber are blended and woven, and the prepared weaving pipe material has the advantages of high strength, good toughness, excellent wear resistance and the like, and has good practical application in the aspect of external parts of high-pressure air ribs of the inflatable floating bridge.

Description

Technical Field

[0001] This invention relates to the field of fiber technology, specifically to a material and preparation method for the external woven tube of high-pressure air ribs in an inflatable pontoon bridge. Background Technology

[0002] Polyester fiber is a high-performance synthetic polyester fiber with advantages such as high mechanical strength, good high-temperature resistance, and excellent waterproof performance. It can be made into high-performance fiber cloth, braided tubes, and fabrics, and has important applications in concrete, inflatable pontoon bridge components, and clothing fabrics. Although traditional polyester fiber has high strength, its low elongation at break and poor flexibility limit its practical applications.

[0003] Low-density polyethylene (LDPE) fiber is widely used due to its low density, high strength, and good flexibility. Composite fibers made by spinning polyethylene and polyester can combine the advantages of both polyethylene and polyester fibers. Patent CN119800554B discloses an ultrafine polyethylene / polyester composite fiber and its preparation method. Using polyethylene as the outer layer and modified polyester and compatibilizers such as poly(ethylene-co-glycidyl methacrylate)-g-polymethyl methacrylate graft copolymer as the core layer, the resulting composite fiber exhibits excellent properties. However, this patented composite fiber suffers from problems such as low elongation at break and low flexibility. Summary of the Invention

[0004] (a) Technical problems to be solved: To address the shortcomings of existing technologies, this invention provides a material and preparation method for the external woven tube of the high-pressure air rib of an inflatable pontoon bridge, which solves the problem of low strength and toughness of polyester fiber and its woven materials.

[0005] (II) Technical Solution: A method for preparing the external woven tube material for the high-pressure air ribs of an inflatable pontoon bridge: (1) Triethylamine, an 1-en-ol compound, and methyl 4-chloroformylbenzoate were added to dichloromethane in an ice bath. After the reaction, the mixture was filtered, the filtrate was distilled under reduced pressure, washed with water, and the product was recrystallized in ethanol to obtain an alkenyl benzoate. The reaction formula is as follows: .

[0006] (2) Add alkenyl benzoate and azobisisobutyronitrile to toluene, react in a nitrogen atmosphere, wash the product with ethanol after vacuum distillation, and dry to obtain polyvinyl benzoate.

[0007] (3) Polyethylene terephthalate, polyethylene resin, polyvinyl benzoate and antioxidant 1076 are added to a mixer and mixed, and then spun and stretched in a melt spinning machine to obtain polyester composite fiber.

[0008] (4) Using polyester composite fiber as weft yarn and basalt fiber as warp yarn, the material of the external woven tube of the high pressure air rib of the inflatable floating bridge is woven by a weaving machine.

[0009] Preferably, the reaction temperature in (1) is 15-30℃ and the reaction time is 4-7h.

[0010] Preferably, in (1), the amount of triethylamine is 52-56 parts by weight, the amount of 1-en-ol compound is 37-65 parts by weight, and the amount of methyl 4-chloroformylbenzoate is 100 parts by weight.

[0011] Preferably, the 1-ene-ol compound in (1) is 3-buten-1-ol, 4-penten-1-ol, 5-hexen-1-ol, 6-hepten-1-ol or 7-octen-1-ol.

[0012] Preferably, in (2), the amount of vinyl benzoate monomer is 100 parts by weight and the amount of azobisisobutyronitrile is 0.4-0.5 parts by weight.

[0013] Preferably, the reaction temperature in (2) is 65-80℃ and the reaction time is 3-5h.

[0014] Preferably, in (3), the amount of polyethylene terephthalate is 65-85 parts by weight, the amount of polyethylene resin is 15-35 parts by weight, the amount of polyvinyl benzoate is 2-7 parts by weight, and the amount of antioxidant is 0.1-0.2 parts by weight.

[0015] Preferably, in (3), the temperature of zones 1-3 of the melt spinning machine is 240-280℃, the spinning speed is 600-1200m / min, and the stretching ratio is 3-3.5 times.

[0016] Preferably, in (4), the weft density is 40-55 threads / 10cm and the warp density is 180-240 threads / 10cm.

[0017] (III) Beneficial technical effects of the present invention: Polyethylene terephthalate (PET), polyethylene resin, and polyvinyl benzoate are blended and spun to obtain polyester composite fibers. Polyvinyl benzoate contains polyethylene molecular chains and has a large number of terephthalate groups similar to PET, which allows polyvinyl benzoate to act as a compatibilizer, improving the compatibility between polyethylene terephthalate and polyethylene. The prepared composite fibers have high breaking strength and elongation at break, and can combine the strength of polyester fibers with the toughness of polyethylene fibers.

[0018] This invention involves blending polyester composite fibers and basalt fibers to produce a woven tube material with advantages such as high strength, good toughness, and excellent wear resistance. It has excellent practical applications in the external components of high-pressure air ribs for inflatable floating bridges. Attached Figure Description

[0019] Figure 1 The infrared spectrum is that of the polyvinyl benzoate prepared in Example 1. Detailed Implementation

[0020] The present invention will now be described in further detail. It is worth noting that the following embodiments are only for better explaining the content of the present invention and do not limit the scope of protection of the present invention. Process steps not disclosed in the embodiments are prior art. Example 1:

[0021] (1) In an ice bath, 16.8 g of triethylamine, 15.4 g of 5-hexen-1-ol, and 30 g of methyl 4-chloroformylbenzoate were added to 500 mL of dichloromethane. The mixture was stirred at 20 °C for 6 h. After filtration, the filtrate was distilled under reduced pressure, washed with water, and the product was recrystallized in ethanol to obtain alkenyl benzoate with the following structural formula: .

[0022] (2) Add 50g of alkenyl benzoate and 0.22g of azobisisobutyronitrile to 300mL of toluene, stir and react for 3h at 75℃ under nitrogen atmosphere, wash the product with ethanol after vacuum distillation, and dry to obtain polyvinyl benzoate. Figure 1 2923 cm⁻¹ in the infrared spectrum -1 2852cm -1 The stretching vibration peak of -CH2- in the polyethylene molecular chain, 1724 cm⁻¹. -1 It is the stretching vibration peak of C=O in the ester group, 1533-1449 cm⁻¹ -1 These are characteristic peaks of the benzene ring skeleton.

[0023] (3) Add 850g of polyethylene terephthalate (PET resin powder, particle size 120 mesh, Dongguan Juxinheng Rubber & Plastic Co., Ltd., the same below), 150g of polyethylene resin (model EGF-35B LLDPE, Shandong Ousheng Chemical Co., Ltd., the same below), 20g of polyvinyl benzoate and 1g of antioxidant 1076 to a mixer and mix them. Then spin them in a melt spinning machine. The temperature of zones 1-3 is 240℃, 270℃ and 280℃, and the spinning speed is 600m / min. Stretch the fiber at a ratio of 3.5 times to obtain polyester composite fiber.

[0024] Comparative Example 1: (1) Add 850g of polyethylene terephthalate, 150g of polyethylene resin and 1g of antioxidant 1076 to a mixer and mix them. Then spin them in a melt spinning machine. The temperature of zones 1-3 is 240℃, 270℃ and 280℃, and the spinning speed is 600m / min. Stretch the fiber at a ratio of 3.5 times to obtain polyester composite fiber.

[0025] Comparative Example 2: (1) Add 50g of methyl 4-vinylbenzoate (CAS No. 1076-96-6) and 0.22g of azobisisobutyronitrile to 300mL of toluene. Stir the reaction at 75℃ for 3h under nitrogen atmosphere. After vacuum distillation, wash the product with ethanol and dry to obtain polystyrene methyl benzoate.

[0026] (2) Add 850g of polyethylene terephthalate, 150g of polyethylene resin, 20g of polystyrene methyl ester and 1g of antioxidant 1076 to a mixer and mix them. Then spin them in a melt spinning machine. The temperatures of zones 1-3 are 240℃, 270℃ and 280℃, and the spinning speed is 600m / min. Stretch the fiber at a ratio of 3.5 to obtain polyester composite fiber.

[0027] Comparative Example 3: (1) In an ice bath, 16.8 g of triethylamine, 15.4 g of 5-hexen-1-ol, and 21.2 g of benzoyl chloride were added to 500 mL of dichloromethane. The mixture was stirred at 20 °C for 6 h. After filtration, the filtrate was distilled under reduced pressure, washed with water, and the product was recrystallized in ethanol to obtain an alkenyl benzoate with the following structural formula: .

[0028] (2) Add 50g of alkenyl benzoate and 0.22g of azobisisobutyronitrile to 300mL of toluene, stir and react for 3h at 75℃ under nitrogen atmosphere, wash the product with ethanol after vacuum distillation, and dry to obtain polyvinyl benzoate.

[0029] (3) Add 850g polyethylene terephthalate, 150g polyethylene resin, 20g polyvinyl benzoate and 1g antioxidant 1076 into a mixer and mix them. Then spin them in a melt spinning machine. The temperature of zones 1-3 is 240℃, 270℃ and 280℃, and the spinning speed is 600m / min. Stretch the fiber at a ratio of 3.5 times to obtain polyester composite fiber.

[0030] Comparative Example 4: (1) Add 850g of polyethylene terephthalate, 150g of polyethylene resin, 20g of maleic anhydride grafted polyethylene (model NE062E ADMER, Suzhou Lutuo Materials Co., Ltd.), and 1g of antioxidant 1076 to a mixer and mix them. Then, spin the mixture in a melt spinning machine. The temperatures in zones 1-3 are 240℃, 270℃, and 280℃, and the spinning speed is 600m / min. Stretch the fiber at a ratio of 3.5 to obtain polyester composite fiber. Example 2:

[0031] (1) In an ice bath, 16.3g of triethylamine, 19.5g of 7-octen-1-ol and 30g of methyl 4-chloroformylbenzoate were added to 500mL of dichloromethane. The mixture was stirred at 15℃ for 7h. After filtration, the filtrate was distilled under reduced pressure. After washing with water, the product was recrystallized in ethanol to obtain alkenyl benzoate.

[0032] (2) Add 50g of alkenyl benzoate and 0.25g of azobisisobutyronitrile to 400mL of toluene. Stir the reaction at 80℃ for 3h under nitrogen atmosphere. After vacuum distillation, wash the product with ethanol and dry to obtain polyvinyl benzoate.

[0033] (3) Add 750g polyethylene terephthalate, 250g polyethylene resin, 40g polyvinyl benzoate and 2g antioxidant 1076 into a mixer and mix them. Then spin them in a melt spinning machine. The temperatures of zones 1-3 are 240℃, 270℃ and 275℃, and the spinning speed is 1200m / min. Stretch the fiber at a ratio of 3 times to obtain polyester composite fiber. Example 3:

[0034] (1) In an ice bath, 15.6 g of triethylamine, 11.1 g of 3-buten-1-ol and 30 g of methyl 4-chloroformylbenzoate were added to 400 mL of dichloromethane. The mixture was stirred at 30 °C for 4 h. After filtration, the filtrate was distilled under reduced pressure. After washing with water, the product was recrystallized in ethanol to obtain alkenyl benzoate.

[0035] (2) Add 50g of alkenyl benzoate and 0.2g of azobisisobutyronitrile to 400mL of toluene, stir and react for 5h at 65℃ under nitrogen atmosphere, wash the product with ethanol after vacuum distillation, and dry to obtain polyvinyl benzoate.

[0036] (3) Add 650g polyethylene terephthalate, 350g polyethylene resin, 70g polyvinyl benzoate and 2g antioxidant 1076 to a mixer and mix them. Then spin them in a melt spinning machine. The temperatures of zones 1-3 are 240℃, 270℃ and 275℃, and the spinning speed is 800m / min. Stretch the fiber at a ratio of 3.5 to obtain polyester composite fiber.

[0037] The tensile properties of polyester composite fibers were tested according to GB / T 14337-2022. The test results are shown in Table 1.

[0038] Table 1 Tensile properties of polyester composite fibers

[0039] Comparative Example 1 involved blending polyethylene terephthalate (PET) and polyethylene into fibers. Because these two are thermodynamically incompatible, the composite exhibited low breaking strength and elongation at break. In each example, polyvinyl benzoate was added. Polyvinyl benzoate contains polyethylene molecular chains and a large number of terephthalate groups similar to PET, allowing it to act as a compatibilizer and improve the compatibility between PET and polyethylene. The resulting composite fiber combines the strength of polyester fibers with the toughness of polyethylene fibers, exhibiting high breaking strength and elongation at break.

[0040] Comparative Example 2 uses polystyrene methyl methacrylate, which has a polystyrene molecular chain and poor compatibility with polyethylene. To improve the compatibility between polyethylene terephthalate and polyethylene, the composite fiber has lower breaking strength and elongation at break than in Example 1.

[0041] The alkenyl benzoate and polyvinyl benzoate of Comparative Example 3 have fewer benzoate groups, and their compatibilizing effect on polyethylene terephthalate and polyethylene is lower than that of polyvinyl benzoate of Example 1. The breaking strength and breaking elongation of the composite fiber are lower than those of Example 1.

[0042] Comparative Example 4 used conventional maleic anhydride-grafted polyethylene as a compatibilizer, and the composite fiber's breaking strength and elongation at break were also lower than those of Example 1.

[0043] The present invention also provides the following embodiments: Example 4: Polyester composite fiber (prepared in Example 1) was used as the weft yarn and basalt fiber as the warp yarn. The yarn was woven into shape by a weaving machine with a weft density of 43 threads / 10cm and a warp density of 218 threads / 10cm to obtain the external woven tube material for the high-pressure air rib of the inflatable pontoon bridge.

[0044] Example 5: Polyester composite fiber (prepared in Example 2) was used as the weft yarn and basalt fiber as the warp yarn. The material was woven into shape by a weaving machine with a weft density of 48 threads / 10cm and a warp density of 185 threads / 10cm to obtain the external woven tube material for the high-pressure air rib of the inflatable pontoon bridge.

[0045] Example 6: Polyester composite fiber (prepared in Example 3) was used as the weft yarn and basalt fiber as the warp yarn. The yarn was woven into shape by a weaving machine with a weft density of 54 threads / 10cm and a warp density of 232 threads / 10cm to obtain the external woven tube material for the high-pressure air rib of the inflatable pontoon bridge.

[0046] By blending polyester composite fibers with basalt fibers, a high-strength, tough, and wear-resistant external woven tube material for high-pressure air ribs of inflatable pontoons can be prepared.

[0047] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An air supported pontoon high pressure air rib outer woven tube material characterized by, The outer woven tube material is woven from one or more of polyester composite fiber, basalt fiber; The polyester composite fiber comprises 65-85 parts by weight of polyethylene terephthalate, 15-35 parts by weight of polyvinyl resin, 2-7 parts by weight of polyvinyl benzoate and 0.1-0.2 parts by weight of antioxidant; The polyester composite fiber is prepared by the following method: (1) adding alkenyl benzoate, azobisisobutyronitrile into toluene, and performing reaction in nitrogen atmosphere, washing the product after distillation under reduced pressure, and drying to obtain polyvinyl benzoate; (2) adding polyethylene terephthalate, polyvinyl resin, polyvinyl benzoate and antioxidant into a mixer, and then performing spinning and stretching in a melt spinning machine to obtain the polyester composite fiber.

2. The pneumatic float bridge high pressure air rib outer woven tube material of claim 1, wherein, The temperature in the reaction of (1) is 65-80℃, and the reaction time is 3-5h.

3. The pneumatic float bridge high pressure air rib outer woven tube material of claim 1, wherein, The amount of vinyl benzoate monomer in (1) is 100 parts by weight, and the amount of azobisisobutyronitrile is 0.4-0.5 parts by weight.

4. The pneumatic float bridge high pressure air rib outer woven tube material of claim 3, wherein, The preparation method of the alkenyl benzoate is: adding triethylamine, alken-1-ol compound and 4-chloroformyl methyl benzoate into dichloromethane in an ice bath, and performing reaction at 15-30℃ for 4-7h, filtering, distilling the filtrate under reduced pressure, washing with water, and recrystallizing the product to obtain the alkenyl benzoate.

5. The pneumatic float bridge high pressure air rib outer woven tube material of claim 4, wherein, The amount of triethylamine is 52-56 parts by weight, the amount of alken-1-ol compound is 37-65 parts by weight, and the amount of 4-chloroformyl methyl benzoate is 100 parts by weight.

6. The pneumatic float bridge high pressure air rib outer woven tube material of claim 5, wherein, The alken-1-ol compound is 3-butene-1-ol, 4-pentene-1-ol, 5-hexene-1-ol, 6-heptene-1-ol or 7-octene-1-ol.

7. The pneumatic float bridge high pressure air rib outer woven tube material of claim 1, wherein, The temperature of the melt spinning machine in (2) is 240-280℃ in zone 1-3, the spinning speed is 600-1200m / min, and the stretching ratio is 3-3.5 times.

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