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CN-122013521-A - High-strength high-weather-resistance long-fiber polyester base fabric and preparation method thereof

CN122013521ACN 122013521 ACN122013521 ACN 122013521ACN-122013521-A

Abstract

The invention belongs to the technical field of textile material preparation, and particularly relates to a high-strength high-weather-resistance long-fiber polyester base fabric and a preparation method thereof, wherein the preparation method of the high-strength high-weather-resistance long-fiber polyester base fabric comprises the following steps of crystallization drying, melt extrusion, spinning drafting, needling reinforcement, hot rolling and gum dipping, the high-strength high-weather-resistance long-fiber polyester base fabric prepared by the method has the viscosity creep amount of 0.30-0.35mm, the bonding firmness of a product is strong, the elongation is 57-65%, the longitudinal tensile strength is 655-685N/5cm, the transverse tensile strength is 539-570N/5cm, the mechanical property of the base fabric is excellent, the yellowing degree delta YI of an ultraviolet aging test is 1.5-1.6, and the weather resistance of the product is strong.

Inventors

  • ZHANG XIAOMING

Assignees

  • 山东鸿泰新材料有限公司

Dates

Publication Date
20260512
Application Date
20260122

Claims (10)

  1. 1. The preparation method is characterized by comprising the following steps of crystallization drying, melt extrusion, spinning drafting, needling reinforcement, hot rolling and gum dipping; the gum dipping method comprises the steps of preparing composite starch and gum dipping and drying; The preparation method of the composite starch comprises the steps of adding polyethylene glycol diglycidyl ether and 3, 3-dithiodipropionic dihydrazide into a container, controlling the temperature of the container to be 55-65 ℃, reacting for 1.5-2 hours under nitrogen, obtaining a composite modifier after the reaction is finished, slowly adding corn starch into deionized water, stirring while adding, controlling the stirring speed to be 100-120r/min, heating the container to 75-85 ℃, keeping stirring during the period, continuously preserving heat for gelatinization for 30-40min after the system is in a uniform transparent paste, sieving after gelatinization is finished, obtaining filtered starch paste, adding the filtered starch paste and a catalyst into the composite modifier, controlling the temperature of the container to be 85-95 ℃, and obtaining the composite starch after the reaction is finished through washing, precipitation, filtration and drying.
  2. 2. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, The catalyst is tetrabutylammonium bromide; The sieved screen is 100 meshes; The mass ratio of the polyethylene glycol diglycidyl ether to the 3, 3-dithiodipropionic dihydrazide is 1:1.5-2.5; the mass ratio of the corn starch to the deionized water is 10:45-55; the mass ratio of the filtered starch paste to the catalyst to the composite modifier is 55-65:0.05:1.5-2.
  3. 3. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, The crystallization and drying method comprises the steps of placing a fiber-grade semi-dull polyester slice in a crystallization bed, controlling the equipment temperature to be 175-185 ℃, crystallizing for 10-20min, placing the product in a container after crystallization is finished, and drying for 5-7h at 165-175 ℃ to obtain the dried polyester slice after drying is finished.
  4. 4. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, The melt extrusion method comprises the steps of mixing the dried polyester chips with weather-resistant additives and dispersing agents, adding the mixture into an extruder after uniform mixing, controlling the temperature of each heating area of a screw extruder to be 260-305 ℃, filtering the extruded melt after extrusion, controlling the pressure of a filtering instrument to be 6.5-12Mpa, and obtaining the filtered melt after filtration; The weather-resistant additive is HALS, and the dispersing agent is zinc stearate; The mass ratio of the dried polyester chips to the weather-resistant additive to the dispersing agent is 80-85:0.5-1:1-2.
  5. 5. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, The spinning drafting method comprises the steps of placing filtered melt into a spinning machine, spraying the melt through a spinneret plate to form primary fiber filaments, controlling the initial pressure of a spinning component to be 15-25Mpa, controlling the temperature of a heating medium of a spinning system to be 280-305 ℃, cooling the primary fiber by adopting side blowing, controlling the temperature of the side blowing to be 18-26 ℃, the relative humidity to be 60-65%, the static pressure of an air duct to be 400-600Pa, the wind speed to be 0.3-0.8m/s, carrying out air draft on the cooled primary fiber by using an air draft device, controlling the air draft pressure to be 0.3-1.0Mpa, and obtaining the drafted filament bundle after the draft is finished.
  6. 6. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, The needling reinforcement method comprises the steps of mechanically dividing the drawn tows, placing the tows into a yarn swinging device, controlling the frequency of the yarn swinging device to be 400-800n/min, controlling the swing to be 35-65mm, obtaining the swinging tows, uniformly laying the swinging tows on a net curtain to form a fiber net, controlling the technological speed of the net forming machine to be 5-15m/min, controlling the temperature of a pre-pressing roller to be 100-160 ℃, controlling the air speed of the net absorbing wind to be 2-10m/min, performing needling reinforcement on the fiber net, controlling the needling density of a needling machine to be 3000-5000 needles/m, the needling frequency to be 800-1500 times/min, the needling stroke to be 20-40mm, the needling depth to be 3-10mm, and the needling density to be 23-36 needles/cm & lt 2 & gt, and obtaining the semi-finished cloth after needling.
  7. 7. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, The hot rolling method comprises the steps of carrying out unit mesh heat setting on the needled semi-finished fabric at 150-180 ℃, after setting, putting the set semi-finished fabric into a hot rolling mill, controlling the temperature of a hot rolling press roller to be 180-200 ℃ and the pressure to be 50-60bar, and obtaining the hot rolled tire base fabric after hot rolling.
  8. 8. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 1, which is characterized in that, Adding deionized water, composite starch, a water-soluble polymer ultraviolet absorbent and an initiator into a reaction container, stirring uniformly to obtain composite glue, raising the temperature of the reaction container to 65-75 ℃, immersing the hot-rolled tyre base cloth into the composite glue for 30-50min, carrying out mould penetrating pre-drying on the impregnated tyre base cloth after the immersion is finished, controlling the pre-drying temperature to 120-160 ℃, the pre-drying time to 20-30min, carrying out mould penetrating drying after the pre-drying is finished, controlling the drying temperature to 190-230 ℃ and the drying time to 10-20min, and obtaining the finished product of the high-strength high-weather-resistance long-fiber polyester tyre base cloth after the drying is finished.
  9. 9. The method for preparing the high-strength high-weather-resistance long-fiber polyester base fabric according to claim 8, which is characterized in that, The mass ratio of the deionized water to the composite starch to the water-soluble polymer ultraviolet absorbent to the initiator is 81-88:8-12:4-6:0.1-0.3; The water-soluble macromolecule ultraviolet absorbent is 2, 4-dihydroxybenzophenone; The initiator is ammonium persulfate.
  10. 10. A high strength high weatherability long fiber polyester base fabric made by the method of any one of claims 1-9.

Description

High-strength high-weather-resistance long-fiber polyester base fabric and preparation method thereof Technical Field The invention belongs to the technical field of textile material preparation, and particularly relates to a high-strength high-weather-resistance long-fiber polyester base fabric and a preparation method thereof. Background The polyester is used as an important synthetic fiber material, and two products of long fiber and short fiber can be obtained through different production processes, wherein the polyester long fiber has wide application in the fields of textile, building, automobiles and the like by virtue of the advantages of light weight, high strength, corrosion resistance and the like, and the polyester short fiber is one of the current mainstream engineering plastics because of good dispersibility and high cost effectiveness, and is mostly used in the scenes of plastic products, carpets, water treatment filters and the like. In the field of base fabrics of tires, early products are mostly prepared by adopting a short fiber carding and needling consolidation process, but the binding force among short fibers is weaker, local damage is easy to occur under the action of repeated stress, the service life of the base fabrics is greatly shortened, the later maintenance cost is increased, the industry gradually turns to the research and development of the base fabrics of long fiber polyester tires in order to break through the performance bottleneck, the middle links of cutting, carding and the like in the production of the short fibers are omitted by adopting a polyester slice direct spinning net forming technology in part of the process, the production flow is shortened, the production efficiency is improved, the fiber damage is reduced, the long fibers are kept in a more complete form and have stronger mechanical continuity, the binding force among the fibers and the overall structural stability are further enhanced, and the base fabrics of the tires are improved in the core performances of stretch resistance, tearing resistance, abrasion resistance and the like. The gum dipping process is critical to the performance optimization of the base cloth, the starch gum dipping is an economic and efficient pretreatment method in the existing long-fiber base cloth preparation technology, the strength of the base cloth can be effectively improved, the processing life of the base cloth is prolonged, specifically, a layer of protective paste film is formed on the surface of the fiber by starch gum solution through dipping and drying processes, the film body can firmly coat and adhere each fiber, and reduce the slippage and friction loss of the fiber when being stressed, thereby obviously improving the constant load elongation, tear resistance and fatigue resistance of the base cloth and improving the dimensional stability, wear resistance and weather resistance of the base cloth, but the starch gum dipping has the advantages and the corresponding disadvantages, The starch material is easy to break under the action of high temperature, damp heat or repeated stress, so that the weather resistance and durability of the adhesive layer are insufficient, the integral strength performance of the polyester tire is reduced, and the polyester tire is difficult to adapt to long-term use in severe environments such as outdoor, building and the like. Patent CN117604774a discloses a hydrophobic polyester base fabric, a preparation method and a waterproof coiled material, the method mainly prepares a modified corn starch layer by using a combination reaction of corn starch, a hydrophobic modifier and hydrophobic silica, the obtained polyester base fabric has strong hydrophobicity, the waterproof performance of the polyester base fabric is enhanced, but the method reduces the combination firmness with fibers in the dipping process, so that the durability and strength of the polyester base fabric are reduced. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides the preparation method of the high-strength high-weather-resistance long-fiber polyester base fabric, which can ensure that the long-fiber polyester base fabric has good strength and gum dipping effect. In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the preparation process of high strength and weather resistance long fiber polyester base fabric includes the steps of crystallization drying, smelting extrusion, spinning drafting, needling to strengthen, hot rolling and dipping. The crystallization and drying method comprises the steps of placing a fiber-grade semi-dull polyester slice in a crystallization bed, controlling the equipment temperature to be 175-185 ℃, crystallizing for 10-20min, placing the product in a container after crystallization is finished, and drying for 5-7h at 165-175 ℃ to obtain the dried polyester slice after drying is finished. The melt