A low-VOC and highly flame-retardant car trunk carpet and its processing technology

Abstract

The invention discloses a low-VOC high-flame-retardant car trunk carpet and a processing technology thereof. The processing technology comprises the following steps: step 1: cutting a polyethylene terephthalate surface carpet; placing it in a low eutectic solvent of choline chloride and oxalic acid, hot-dipping; transferring it to a dopamine solution, dipping it at room temperature, and obtaining a pre-treated surface carpet; step 2: placing a honeycomb wood fiber board in a flame retardant solution; adding urea, dipping reaction, washing and drying, and obtaining a pre-treated wood fiber board; step 3: attaching the pre-treated surface carpet to both sides of the pre-treated wood fiber board, drying, and wrapping the edges around; spraying a hydrophobic treatment agent on the upper and lower surfaces, secondary drying, and pressing; obtaining a low-VOC high-flame-retardant car trunk carpet. By pre-treating the surface of the polyethylene terephthalate surface carpet, using dopamine as a binder to bond it to a wood board loaded with a flame retardant, a high-strength low-VOC high-flame-retardant car trunk carpet is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior decoration, in particular to a low-VOC and highly flame-retardant automobile luggage compartment carpet and a processing technology thereof. Background Art

[0002] The trunk of a car is generally used to store items, which is equivalent to the storage room of a car. A trunk carpet is usually installed to protect the beauty of the trunk interior and prevent the items in the trunk from sliding. In recent years, with the improvement of the quality of life, people are no longer limited to the performance of cars. The quality requirements for products such as car interiors have increased, including low VOC properties to improve the air environment inside the car; hydrophobicity, which can produce a self-cleaning function and reduce the replacement and cleaning rate; flame retardancy, which can reduce property losses and casualties when a car catches fire.

[0003] Existing car trunk carpets are generally obtained by compounding fiberboard and fabric layers. Among them, the fabric layer mostly uses a polyurethane surface layer, and polymer glue is usually used in the compounding process. Polyurethane or polymer glue usually contains volatile harmful gases, which affect the internal air. Polyethylene terephthalate is a non-toxic and odorless polymer with high fatigue resistance and high abrasion resistance, which can effectively replace the polyurethane surface layer. However, the flame retardancy of pure polyethylene terephthalate is low, and the performance needs to be further improved.

[0004] Therefore, it is of great significance to solve the above problems and prepare a low-VOC and highly flame-retardant car trunk carpet. Summary of the invention

[0005] The object of the present invention is to provide a low-VOC and highly flame-retardant automobile trunk carpet and a processing technology thereof to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0008] Step 1: Cut the polyethylene terephthalate blanket into pieces; place the blanket in a low eutectic solvent of choline chloride and oxalic acid, and perform hot dipping; transfer the blanket to a dopamine solution, and perform dipping at room temperature to obtain a pretreated blanket;

[0009] Step 2: placing the honeycomb wood fiber board in a flame retardant solution; adding urea, impregnating and reacting, washing and drying, and obtaining a pretreated wood fiber board;

[0010] Step 3: Lay the pretreated surface carpet on both sides of the pretreated wood fiberboard, dry it, and wrap it around the edges; spray the hydrophobic treatment agent on the upper surface and the lower surface, dry it for the second time, and press it together; and obtain a low-VOC and highly flame-retardant car trunk carpet.

[0011] More optimally, in step 1, during the hot impregnation process: the temperature is 60-65°C, and the time is 2-3 hours; during the room temperature impregnation process: the temperature is 20-25°C, and the time is 2-3 hours; in step 2, during the impregnation reaction process: the temperature is 100-110°C, and the reaction time is 2-3 hours.

[0012] More optimally, the impregnation ratio of the polyethylene terephthalate blanket to the low eutectic solvent is 1:(20-25).

[0013] More optimally, in the dopamine solution, the solvent is a Tris buffer solution with a pH of 7.5 to 7.8, the concentration of the dopamine solution is 1 to 2 mol / L, and the immersion ratio of the polyethylene terephthalate blanket to the dopamine solution is 1:(10 to 15).

[0014] More optimally, in step 2, the method for preparing the flame retardant solution is: dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 118-125°C, adding phosphoric acid; setting the temperature to 145-155°C, reacting for 1.5-2 hours, and obtaining a flame retardant solution.

[0015] More optimally, the mass ratio of sorbitol, nano zinc oxide, phosphoric acid and urea is 1:0.5:(4-5):(2-3).

[0016] More optimally, in step 3, during the secondary drying process, the temperature is 70-75°C, the vacuum pressure is increased to 0.1 MPa, and the drying time is 3-4 hours; during the pressing process: the pressure is 0.8-1 N / cm 2 ; Temperature is 80-90°C; Laminating time is 30-60 seconds;

[0017] More optimally, the hydrophobic treatment agent uses water as a solvent and contains 0.8 to 1.0 mol / L of ferric sulfate, 160 to 180 mL / L of hexadecyltrimethoxysilane, and 1.8 to 2 mol / L of sodium borate.

[0018] More optimally, the single-side spraying amount of the hydrophobic treatment agent is 2 to 2.5 L / m 2 .

[0019] More optimally, a low-VOC and high-flame-retardant car trunk carpet is prepared by a processing technology of a low-VOC and high-flame-retardant car trunk carpet.

[0020] In the technical scheme, the surface of the polyethylene terephthalate carpet is treated to produce a polar surface; dopamine is then used as a binder to bond it to a wood board loaded with a flame retardant; finally, a hydrophobic treatment agent is used to hydrophobize the surface while strengthening the interface adhesion; thereby, a high-strength, low-VOC, and highly flame-retardant car trunk carpet is prepared.

[0021] In the scheme (1), a low eutectic solvent formed by choline chloride and oxalic acid is used to impregnate the polyethylene terephthalate blanket, causing it to swell and produce chemical reactions on the surface, increasing the surface roughness and polarity, and converting the hydrophobic surface into a hydrophilic surface; then, it is adsorbed on the surface through the impregnation process to act as a binder; wherein, dopamine is not dried after impregnation, but is dried and bonded after being composited with the wood fiberboard. Due to the change in polarity, the polyethylene terephthalate blanket has increased interfacial adhesion. At the same time, dopamine is an environmentally friendly substance. It is used as an interfacial adhesive and has low VOC properties.

[0022] In the (2) scheme, a honeycomb wood cellulose board is used as the middle layer. Its honeycomb pores effectively achieve the effect of shock absorption and noise reduction. It is first placed in a flame retardant solution to form a POC bond with the hydroxyl group of the wood fiber board to effectively load the flame retardant; then, through ionic action, the phosphorous acid anion in the flame retardant and the ammonium ion in the urea form an ionic bond, synergistically improving the flame retardancy and adhesion.

[0023] Among them, the flame retardant is formed by esterification of sorbitol and phosphoric acid; nano zinc oxide is added in the process, and its surface hydroxyl groups are used to generate hydrogen bonding or esterification with the two substances, thereby forming a three-phase flame retardant, further improving the flame retardancy. At the same time, nano zinc oxide can increase the mechanical properties of the bonding interface; in addition, it generally also has the function of an odor absorber.

[0024] (3) In order to promote the interfacial adhesion of the polyethylene terephthalate carpet, a surface modification treatment is performed in step 1; however, if the surface of the car luggage carpet is hydrophilic, it cannot have waterproof properties and has low practicality. Therefore, in the scheme, a hydrophobic treatment agent is sprayed, and the iron ions are chelated with polydopamine formed by self-polymerization, and the low surface energy substance hexadecyltrimethoxysilane is grafted on the surface; thereby, a super-hydrophobic structure is generated on the surface, which has a self-cleaning effect.

[0025] In addition, after spraying the hydrophobic treatment agent, it is dried under a certain pressure so that the sprayed hydrophobic treatment agent can act on the bonding interface, promote the cross-linking of the dopamine bonding layer, and increase the bonding interface performance. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The preparation method of the low eutectic solvent is as follows: choline chloride and oxalic acid are mixed in a molar ratio of 1:2, and the temperature is set to 120° C. and stirred until transparent to obtain a low eutectic solvent.

[0028] Embodiment 1:

[0029] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0030] Step 1: Cut the polyethylene terephthalate blanket, first place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:25, and hot-immerse it at a temperature of 65°C for 2.5 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5, and the concentration of the dopamine solution is 1.5 mol / L), set the immersion ratio to 1:12, and immerse it at a temperature of 25°C for 3 hours, take it out, and obtain a pretreated blanket.

[0031] Step 2: The flame retardant solution is prepared by weighing the materials according to the mass ratio of sorbitol, nano zinc oxide, phosphoric acid and urea of ​​1:0.5:4.5:2.5; dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 120°C, adding phosphoric acid; setting the temperature to 150°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 105°C, adding urea, impregnating and reacting for 2 hours, washing and drying to obtain a pretreated wood fiber board;

[0032] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2.5 hours, wrap the edges around; spray 2L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, at a temperature of 72°C, vacuum pressurize to 0.1MPa, and secondary dry for 3.5 hours; set the pressure to 0.8N / cm 2 ; The temperature is 85°C; The pressing time is 45 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0033] The hydrophobic treatment agent uses water as a solvent and contains 1.0 mol / L of ferric sulfate, 180 mL / L of hexadecyltrimethoxysilane, and 1.8 mol / L of sodium borate.

[0034] Embodiment 2:

[0035] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0036] Step 1: Cut the polyethylene terephthalate blanket, first place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:20, and hot-immerse it at 60°C for 2.5 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5, and the concentration of the dopamine solution is 1 mol / L), set the immersion ratio to 1:10, and immerse it at 20°C for 2 hours, take it out, and obtain a pretreated blanket.

[0037] Step 2: The flame retardant solution is prepared by weighing the materials according to the mass ratio of sorbitol, nano zinc oxide, phosphoric acid and urea of ​​1:0.5:4:2; dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 118°C, adding phosphoric acid; setting the temperature to 150°C, reacting for 1.5 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 100°C, adding urea, impregnating and reacting for 3 hours, washing and drying to obtain a pretreated wood fiber board;

[0038] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2 hours, and wrap the edges around; spray 2L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, pressurize to 0.1MPa under vacuum at 70℃, and dry for 3 hours; set the pressure to 0.8N / cm 2 ; The temperature is 90°C; The pressing time is 30 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0039] The hydrophobic treatment agent uses water as a solvent and contains 0.8 mol / L of ferric sulfate, 160 mL / L of hexadecyltrimethoxysilane, and 1.8 mol / L of sodium borate.

[0040] Embodiment 3:

[0041] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0042] Step 1: Cut the polyethylene terephthalate blanket, first place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:25, and hot-immerse it at a temperature of 60-65° C. for 3 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.8, and the concentration of the dopamine solution is 1-2 mol / L), set the immersion ratio to 1:15, and immerse it at a temperature of 25° C. for 3 hours, take it out, and obtain a pretreated blanket.

[0043] Step 2: The flame retardant solution is prepared by weighing the materials according to the mass ratio of sorbitol, nano zinc oxide, phosphoric acid and urea of ​​1:0.5:5:3; dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 125°C, adding phosphoric acid; setting the temperature to 155°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 110°C, adding urea, impregnating and reacting for 2 hours, washing and drying to obtain a pretreated wood fiber board;

[0044] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 3 hours, and wrap the edges around; spray 2.5L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, pressurize to 0.1MPa under vacuum at 75℃, and dry for 4 hours; set the pressure to 1N / cm 2 ; The temperature is 80°C; The pressing time is 60 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0045] The hydrophobic treatment agent uses water as a solvent and contains 1.0 mol / L of ferric sulfate, 180 mL / L of hexadecyltrimethoxysilane, and 2 mol / L of sodium borate.

[0046] Comparative Example 1:

[0047] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0048] Step 1: Cut the polyethylene terephthalate blanket and perform plasma surface treatment; place it in a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5 and the concentration of the dopamine solution is 1.5 mol / L), set the immersion ratio to 1:12, immerse it at a temperature of 25° C. for 3 hours, take it out, and obtain a pretreated blanket.

[0049] Step 2: The flame retardant solution is prepared by weighing the materials according to the mass ratio of sorbitol, nano zinc oxide, phosphoric acid and urea of ​​1:0.5:4.5:2.5; dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 120°C, adding phosphoric acid; setting the temperature to 150°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 105°C, adding urea, impregnating and reacting for 2 hours, washing and drying to obtain a pretreated wood fiber board;

[0050] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2.5 hours, wrap the edges around; spray 2L / m on one side. 2, spray the hydrophobic treatment agent on the upper and lower surfaces, at a temperature of 72°C, vacuum pressurize to 0.1MPa, and secondary dry for 3.5 hours; set the pressure to 0.8N / cm 2 ; The temperature is 85°C; The pressing time is 45 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0051] The hydrophobic treatment agent uses water as a solvent and contains 1.0 mol / L of ferric sulfate, 180 mL / L of hexadecyltrimethoxysilane, and 1.8 mol / L of sodium borate.

[0052] Comparative Example 2:

[0053] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0054] Step 1: Cut the polyethylene terephthalate blanket, first place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:25, and hot-immerse it at a temperature of 65°C for 2.5 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5, and the concentration of the dopamine solution is 1.5 mol / L), set the immersion ratio to 1:12, and immerse it at a temperature of 25°C for 3 hours, take it out, and obtain a pretreated blanket.

[0055] Step 2: The flame retardant solution is prepared by weighing substances according to a mass ratio of sorbitol, phosphoric acid and urea of ​​1:4.5:2.5; dispersing sorbitol in N,N-dimethylformamide, setting the temperature to 120°C, adding phosphoric acid; setting the temperature to 150°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 105°C, adding urea, immersing and reacting for 2 hours, washing and drying to obtain a pretreated wood fiber board;

[0056] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2.5 hours, wrap the edges around; spray 2L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, at a temperature of 72°C, vacuum pressurize to 0.1MPa, and secondary dry for 3.5 hours; set the pressure to 0.8N / cm 2 ; The temperature is 85°C; The pressing time is 45 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0057] The hydrophobic treatment agent uses water as a solvent and contains 1.0 mol / L of ferric sulfate, 180 mL / L of hexadecyltrimethoxysilane, and 1.8 mol / L of sodium borate.

[0058] Comparative Example 3:

[0059] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0060] Step 1: Cut the polyethylene terephthalate blanket, first place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:25, and hot-immerse it at a temperature of 65°C for 2.5 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5, and the concentration of the dopamine solution is 1.5 mol / L), set the immersion ratio to 1:12, and immerse it at a temperature of 25°C for 3 hours, take it out, and obtain a pretreated blanket.

[0061] Step 2: The flame retardant solution is prepared by weighing substances according to a mass ratio of sorbitol, nano zinc oxide, phosphoric acid, and urea of ​​1:0.5:4.5:2.5; dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 120°C, and adding phosphoric acid; setting the temperature to 150°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; shaking and immersing for 2 hours, washing and drying, and obtaining a pretreated wood fiber board;

[0062] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2.5 hours, wrap the edges around; spray 2L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, at a temperature of 72°C, vacuum pressurize to 0.1MPa, and secondary dry for 3.5 hours; set the pressure to 0.8N / cm 2 ; The temperature is 85°C; The pressing time is 45 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0063] The hydrophobic treatment agent uses water as a solvent and contains 1.0 mol / L of ferric sulfate, 180 mL / L of hexadecyltrimethoxysilane, and 1.8 mol / L of sodium borate.

[0064] Comparative Example 4:

[0065] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0066] Step 1: Cut the polyethylene terephthalate blanket, place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:25, and hot-immerse it at 65°C for 2.5 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5 and a concentration of 1.5 mol / L), set the immersion ratio to 1:12, and immerse it at 25°C for 3 hours, take it out, and obtain a pretreated blanket. Polyethylene terephthalate blanket and low eutectic solvent).

[0067] Step 2: The flame retardant solution is prepared by weighing materials according to a mass ratio of nano zinc oxide, phosphoric acid and urea of ​​0.5:4.5:2.5; dispersing nano zinc oxide in N,N-dimethylformamide, setting the temperature to 120°C, adding phosphoric acid; setting the temperature to 150°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 105°C, adding urea, immersing and reacting for 2 hours, washing and drying to obtain a pretreated wood fiber board;

[0068] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2.5 hours, wrap the edges around; spray 2L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, at a temperature of 72°C, vacuum pressurize to 0.1MPa, and secondary dry for 3.5 hours; set the pressure to 0.8N / cm 2 ; The temperature is 85°C; The pressing time is 45 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0069] The hydrophobic treatment agent uses water as a solvent and contains 1.0 mol / L of ferric sulfate, 180 mL / L of hexadecyltrimethoxysilane, and 1.8 mol / L of sodium borate.

[0070] Comparative Example 5:

[0071] A processing technology for a low-VOC and highly flame-retardant car trunk carpet comprises the following steps:

[0072] Step 1: Cut the polyethylene terephthalate blanket, place it in a low eutectic solvent of choline chloride and oxalic acid, set the immersion ratio to 1:25, and hot-immerse it at 65°C for 2.5 hours; transfer it to a dopamine solution (the solvent is a Tris buffer solution with a pH of 7.5 and a concentration of 1.5 mol / L), set the immersion ratio to 1:12, and immerse it at 25°C for 3 hours, take it out, and obtain a pretreated blanket. Polyethylene terephthalate blanket and low eutectic solvent).

[0073] Step 2: The flame retardant solution is prepared by weighing the materials according to the mass ratio of sorbitol, nano zinc oxide, phosphoric acid and urea of ​​1:0.5:4.5:2.5; dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 120°C, adding phosphoric acid; setting the temperature to 150°C, reacting for 2 hours to obtain a flame retardant solution; placing a honeycomb wood fiber board in the flame retardant solution; setting the temperature to 105°C, adding urea, impregnating and reacting for 2 hours, washing and drying to obtain a pretreated wood fiber board;

[0074] Step 3: Lay the pretreated wood fiberboard on both sides with the pretreated surface blanket, set the temperature to 80℃ and dry for 2.5 hours, wrap the edges around; spray 2L / m on one side. 2 , spray the hydrophobic treatment agent on the upper and lower surfaces, at a temperature of 72°C, vacuum pressurize to 0.1MPa, and secondary dry for 3.5 hours; set the pressure to 0.8N / cm 2 ; The temperature is 85°C; The pressing time is 45 seconds; A low VOC and highly flame-retardant car trunk carpet is obtained.

[0075] The hydrophobic treatment agent uses water as a solvent and contains 180 mL / L of hexadecyltrimethoxysilane and 1.8 mol / L of sodium borate.

[0076] Experiment 1: The low-VOC and high-flame-retardant car trunk carpets prepared in the examples and comparative examples were tested for mechanical strength and flame retardancy, and the obtained data are shown below:

[0077] Example tensile strength LOI Example tensile strength LOI Example 1 545N 36.1 Comparative Example 2 525N 34.2 Example 2 540N 36.0 Comparative Example 3 578N 31.1 Example 3 542N 36.0 Comparative Example 4 475N 29.8 Comparative Example 1 514N 35.4 Comparative Example 5 528N 35.1

[0078] Conclusion: From the data in the table, it can be seen that in Examples 1 to 3, the prepared car trunk carpet has high flame retardancy and good mechanical properties. Comparing Example 1 with Comparative Examples 1 to 5, it can be seen that in Comparative Example 1, due to the replacement of plasma modification, the bonding strength is reduced, thereby reducing the mechanical properties, and the flame retardant properties are slightly reduced. In Comparative Example 2, due to the lack of the addition of nano zinc oxide, the interface rigidity of the bonding layer is reduced, and it has flame retardancy, and the lack of addition reduces the flame retardancy. In Comparative Example 3, urea treatment was not used, which significantly reduced the flame retardancy, but increased the mechanical properties, because the alkaline treatment will react strongly with phosphoric acid and cause certain damage to the lignin board. In Comparative Example 4, due to the lack of the addition of sorbitol, the flame retardancy and mechanical properties are significantly reduced, because sorbitol can effectively increase the synergistic flame retardancy of phosphoric acid-urea; at the same time, it buffers the damage to lignin. In Comparative Example 5, due to the lack of the addition of iron sulfate, the cross-linking of polydopamine is reduced, and the secondary bonding interface enhancement effect is not played, which reduces the mechanical properties.

[0079] Experiment 2: The low-VOC and highly flame-retardant car trunk carpet prepared in Example 1 was subjected to a surface hydrophobicity test and a VOC gas level evaluation.

[0080] Conclusion: The surface contact angle of water is 152°; the VOC gas level is evaluated as 0 (odorless).

[0081] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A processing technology for low VOC and highly flame-retardant car trunk carpet, characterized by: The following steps are involved: Step 1: Cut the polyethylene terephthalate blanket into pieces; place the blanket in a low eutectic solvent of choline chloride and oxalic acid, and hot-dip it; transfer the blanket to a dopamine solution, and dip it at room temperature to obtain a pretreated blanket; Step 2: placing the honeycomb wood fiber board in a flame retardant solution; adding urea, impregnating and reacting, washing and drying to obtain a pretreated wood fiber board; Step 3: Lay the pretreated surface carpet on both sides of the pretreated wood fiberboard, dry it, and wrap it around the edges; spray the hydrophobic treatment agent on the upper surface and the lower surface, dry it for the second time, and press it together; and obtain a low-VOC and highly flame-retardant car trunk carpet.

2. The processing technology of a low-VOC and highly flame-retardant car trunk carpet according to claim 1, characterized in that: In step 1, during the hot impregnation process: the temperature is 60-65°C, and the time is 2-3 hours; during the room temperature impregnation process: the temperature is 20-25°C, and the time is 2-3 hours; in step 2, during the impregnation reaction process: the temperature is 100-110°C, and the reaction time is 2-3 hours.

3. The processing technology of a low VOC and highly flame-retardant car trunk carpet according to claim 1, characterized in that: The impregnation ratio of the polyethylene terephthalate blanket to the low eutectic solvent is 1:(20-25).

4. The processing technology of a low-VOC and highly flame-retardant car trunk carpet according to claim 1, characterized in that: In the dopamine solution, the solvent is a Tris buffer solution with a pH of 7.5 to 7.8, the concentration of the dopamine solution is 1 to 2 mol / L, and the impregnation ratio of the polyethylene terephthalate blanket to the dopamine solution is 1:(10 to 15).

5. The processing technology of a low VOC and highly flame-retardant car trunk carpet according to claim 1, characterized in that: In step 2, the flame retardant solution is prepared by dispersing sorbitol and nano zinc oxide in N,N-dimethylformamide, setting the temperature to 118-125° C., adding phosphoric acid; setting the temperature to 145-155° C., reacting for 1.5-2 hours, and obtaining a flame retardant solution.

6. The processing technology of a low-VOC and highly flame-retardant car trunk carpet according to claim 5, characterized in that: The mass ratio of the sorbitol, nano zinc oxide, phosphoric acid and urea is 1:0.5:(4-5):(2-3).

7. The processing technology of a low VOC and highly flame-retardant car trunk carpet according to claim 1, characterized in that: In step 3, during the secondary drying process, the temperature is 70-75°C, the vacuum pressure is increased to 0.1MPa, and the drying time is 3-4 hours; during the pressing process: the pressure is 0.8-1N / cm 2 ; The temperature is 80-90°C; The pressing time is 30-60 seconds.

8. The processing technology of the low VOC and highly flame-retardant car trunk carpet according to claim 7 is characterized in that: The hydrophobic treatment agent uses water as a solvent and contains 0.8 to 1.0 mol / L of ferric sulfate, 160 to 180 mL / L of hexadecyltrimethoxysilane, and 1.8 to 2 mol / L of sodium borate.

9. The processing technology of a low VOC and highly flame-retardant car trunk carpet according to claim 1, characterized in that: The single-side spraying amount of the hydrophobic treatment agent is 2 to 2.5 L / m 2 . 10 . A low-VOC and high-flame-retardant car trunk carpet prepared according to the processing technology of a low-VOC and high-flame-retardant car trunk carpet according to any one of claims 1 to 9.