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CN-122013531-A - Halogen-free flame-retardant polyester non-woven fabric for automotive interiors and preparation method thereof

CN122013531ACN 122013531 ACN122013531 ACN 122013531ACN-122013531-A

Abstract

The invention discloses a halogen-free flame-retardant polyester non-woven fabric for automotive interiors and a preparation method thereof, and relates to the technical field of non-woven fabrics. The preparation method comprises the steps of reacting hydroxyl-terminated polydimethylsiloxane with diisocyanate to generate polyurethane prepolymer, reacting with flame-retardant modified polyvinyl alcohol to obtain polyvinyl alcohol modified polyurethane emulsion through emulsification, wrapping filler with polydopamine, carrying out surface modification through a silane coupling agent KH-550 to obtain flame-retardant filler, dispersing the polyvinyl alcohol modified polyurethane emulsion and the flame-retardant filler in deionized water to obtain impregnating material, and impregnating the polyester non-woven fabric to obtain the halogen-free flame-retardant polyester non-woven fabric. According to the invention, through the design of the impregnating material, the prepared halogen-free flame-retardant polyester non-woven fabric has excellent flame retardant property and durability, and is suitable for the field of automotive interior materials.

Inventors

  • LI RONGLIAN
  • LU ENLIAN
  • ZHAI CHUANMEI
  • SONG JUN

Assignees

  • 淮安瑞联汽车科技有限公司

Dates

Publication Date
20260512
Application Date
20260206

Claims (10)

  1. 1. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for the automotive interior is characterized by comprising the following steps of: (1) Mixing hydroxyl-terminated polydimethylsiloxane, diisocyanate and a catalyst, reacting, adding a hydrophilic chain extender, and continuing the reaction; Adding polyvinyl alcohol into polyurethane prepolymer to react, adding triethylamine to neutralize, pouring into deionized water to emulsify under high-speed stirring to obtain polyvinyl alcohol modified polyurethane emulsion; (2) Mixing polyvinyl alcohol modified polyurethane emulsion, flame-retardant filler and deionized water to obtain an impregnating material; (3) Immersing the terylene non-woven fabric in the impregnating material for 15-30min, taking out, and drying and curing to obtain the halogen-free flame-retardant terylene non-woven fabric.
  2. 2. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for the automotive trim, which is characterized in that in the step (1), the polyvinyl alcohol is subjected to flame-retardant modification, and the specific process is that [ (6-oxo-6H-dibenzo [ c, e ] [1,2] oxaphosphorin-6-yl) methyl ] succinic acid, polyvinyl alcohol and catalyst p-toluenesulfonic acid are added into dimethyl sulfoxide, and after the reaction, the polyvinyl alcohol subjected to flame-retardant modification is obtained through precipitation, washing and drying.
  3. 3. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for automotive interiors, which is characterized in that the mass ratio of polyvinyl alcohol to [ (6-oxo-6H-dibenzo [ c, e ] [1,2] oxaphosphorinane-6-yl) methyl ] succinic acid to catalyst p-toluenesulfonic acid is 1 (0.25-0.5) (0.001-0.003).
  4. 4. The method for preparing the halogen-free flame-retardant polyester non-woven fabric for automotive interiors, which is characterized in that the proportion of the polyvinyl alcohol to the dimethyl sulfoxide is 1g (10-20) mL.
  5. 5. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for automotive interiors, which is characterized in that in the step (1), the polyvinyl alcohol modified polyurethane emulsion comprises, by mass, 90-100 parts of hydroxyl-terminated polydimethylsiloxane, 45-50 parts of diisocyanate, 3-5 parts of a catalyst, 8-10 parts of a hydrophilic chain extender, 90-100 parts of acetone, 350-400 parts of deionized water, 20-40 parts of polyvinyl alcohol and 6-8 parts of triethylamine.
  6. 6. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for the automotive trim, which is disclosed in claim 1, is characterized in that in the step (2), the flame-retardant filler is prepared by adding dopamine hydrochloride and filler into Tris-HCl buffer solution, performing ultrasonic treatment, stirring reaction, vacuum filtration, washing and drying to obtain polydopamine-coated filler, adding polydopamine-coated filler and silane coupling agent KH-550 into ethanol aqueous solution, and performing ultrasonic dispersion, stirring reaction, centrifugation, washing and drying to obtain the flame-retardant filler.
  7. 7. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for the automotive interior according to claim 1, wherein in the step (2), the mass ratio of the polyvinyl alcohol modified polyurethane emulsion to the flame-retardant filler is 1 (0.1-0.3).
  8. 8. The method of claim 1, wherein in the step (2), the solid content of the impregnating material is 15-25%.
  9. 9. The preparation method of the halogen-free flame-retardant polyester non-woven fabric for the automotive interiors, which is disclosed in claim 1, is characterized in that in the step (3), the drying process condition is that the temperature is 80-100 ℃ and the time is 80-100min, and the curing process condition is that the temperature is 120-150 ℃ and the time is 10-30min.
  10. 10. A halogen-free flame-retardant polyester non-woven fabric for automotive interiors, which is characterized by being prepared by the preparation method according to any one of claims 1-9.

Description

Halogen-free flame-retardant polyester non-woven fabric for automotive interiors and preparation method thereof Technical Field The invention relates to the technical field of non-woven fabrics, in particular to a halogen-free flame-retardant polyester non-woven fabric for automotive interiors and a preparation method thereof. Background With the rapid development of the automotive industry and the increasing consumer demand for safety, environmental protection and comfort of automobiles, the functionality of automotive interior materials has become a focus of attention. Wherein, the flame retardant property is one of key indexes for guaranteeing the life safety of drivers and passengers. The terylene nonwoven fabric is widely applied to parts such as base cloth, sound insulation pad, ceiling and the like of automotive interior due to the advantages of low cost, easy processing, good mechanical property and the like. However, the terylene nonwoven fabric has the defects that 1, the terylene nonwoven fabric is used as a thermoplastic polymer, the Limiting Oxygen Index (LOI) is low, the flammable and molten drop phenomenon is serious, and the potential fire hazard is large, 2, the traditional halogen flame retardant (such as bromine system and chlorine system) has high flame retardant efficiency, but generates a large amount of toxic and corrosive smoke and gas during combustion, and causes secondary hazard to personnel escape and environment, and the use of the terylene nonwoven fabric is being limited by increasingly strict international environmental regulations. Therefore, in order to solve the problems, the invention provides a halogen-free flame-retardant polyester non-woven fabric for automobile interior decoration and a preparation method thereof. Disclosure of Invention The invention aims to provide a halogen-free flame-retardant polyester non-woven fabric for automotive interiors and a preparation method thereof, so as to solve the problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: the preparation method of the halogen-free flame-retardant polyester non-woven fabric for the automotive interior comprises the following steps: (1) Mixing hydroxyl-terminated polydimethylsiloxane, diisocyanate and a catalyst, reacting, adding a hydrophilic chain extender, and continuing the reaction; Adding polyvinyl alcohol into polyurethane prepolymer to react, adding triethylamine to neutralize, pouring into deionized water to emulsify under high-speed stirring to obtain polyvinyl alcohol modified polyurethane emulsion; (2) Mixing polyvinyl alcohol modified polyurethane emulsion, flame-retardant filler and deionized water to obtain an impregnating material; (3) Immersing the terylene non-woven fabric in the impregnating material for 15-30min, taking out, and drying and curing to obtain the halogen-free flame-retardant terylene non-woven fabric. Further, in the step (1), the polyvinyl alcohol is subjected to flame-retardant modification, and the specific process is that [ (6-oxo-6H-dibenzo [ c, e ] [1,2] oxaphosphorin-6-yl) methyl ] succinic acid (DDP), the polyvinyl alcohol and a catalyst p-toluenesulfonic acid are added into dimethyl sulfoxide, and after the reaction, the polyvinyl alcohol subjected to flame-retardant modification is obtained through precipitation, washing and drying; the mass ratio of polyvinyl alcohol to DDP to catalyst p-toluenesulfonic acid is 1 (0.25-0.5) (0.001-0.003); The proportion of the polyvinyl alcohol to the dimethyl sulfoxide is 1g (10-20) mL; The technological conditions of the reaction are that the reaction is carried out for 6 to 10 hours under the protection of nitrogen and at the temperature of 110 to 120 ℃, and the generated water is continuously removed through a water separator during the reaction to push the reaction balance. Further, in the step (1), the polyvinyl alcohol modified polyurethane emulsion comprises the following components, by mass, 90-100 parts of hydroxyl-terminated polydimethylsiloxane, 45-50 parts of diisocyanate, 3-5 parts of a catalyst, 8-10 parts of a hydrophilic chain extender, 90-100 parts of acetone, 350-400 parts of deionized water, 20-40 parts of polyvinyl alcohol and 6-8 parts of triethylamine; the diisocyanate is one of diphenylmethane diisocyanate, ‌ isophorone diisocyanate and ‌ hexamethylene diisocyanate; The catalyst is dibutyl tin dilaurate; the hydrophilic chain extender is one of ‌ dimethylolpropionic acid and ‌ dimethylolbutyric acid. ‌ A Further, in the step (2), the flame-retardant filler is prepared by adding dopamine hydrochloride and filler into Tris-HCl buffer solution, performing ultrasonic treatment, stirring reaction, vacuum filtration, washing and drying to obtain polydopamine-coated filler, adding polydopamine-coated filler and silane coupling agent KH-550 into ethanol aqueous solution, and performing ultrasonic dispersion, stirring reaction, centrifu