Flame-retardant pa foam and method of making and using same

Abstract

The application provides a kind of flame-retardant PA foamed material and its preparation method and application, relate to the technical field of floor material, including the following raw material components: PA6 resin, foaming material, sodium amphibole mineral powder, aluminum nitrate and vermiculite powder, and optional toughening agent, flame-retardant material, stearic acid, lubricant and white oil.The flame-retardant PA foamed material provided by the application can withstand greater pressure and impact force, enhance wear resistance, reduce maintenance and replacement frequency, while the flame-retardant PA foamed material has good flame-retardant and fire-extinguishing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of floor materials, in particular to a flame-retardant PA foaming material, a preparation method thereof and application thereof. BACKGROUND

[0002] Traditional floor materials, such as PVC (polyvinyl chloride) and PP (polypropylene), have been widely used in modern buildings and interior decoration. However, these materials have many shortcomings in performance. PVC floor shows poor flame retardance in practical application. In addition, PVC material has poor biodegradability and is difficult to decompose under natural conditions, which not only aggravates environmental pollution problems, but also is not conducive to the recycling of PVC floor. The surface hardness of PP floor material is insufficient, which affects the use.

[0003] Therefore, the present application is proposed. SUMMARY

[0004] One of the purposes of the present application is to provide a flame-retardant PA foaming material to at least solve one of the technical problems in the prior art. The flame-retardant PA foaming material provided by the present application has strong load-bearing capacity and good flame-retardant performance.

[0005] The second purpose of the present application is to provide a preparation method of the flame-retardant PA foaming material.

[0006] The third purpose of the present application is to provide an application of the flame-retardant PA foaming material or the preparation method of the flame-retardant PA foaming material in the preparation of flame-retardant PA foaming plate.

[0007] In order to achieve the above purposes of the present application, the following technical solutions are adopted:

[0008] In a first aspect, the flame-retardant PA foaming material provided by the present application comprises the following raw material components:

[0009] PA6 resin, foaming material, sodium amphibole mineral powder, aluminum nitrate and vermiculite powder, and optional toughening agent, flame-retardant material, stearic acid, lubricant and white oil.

[0010] Further, the flame-retardant PA foaming material comprises the following raw material components by weight fraction:

[0011] 100 parts of PA6 resin, 2-4 parts of foaming material, 3-5 parts of toughening agent, 10-15 parts of flame-retardant material, 40-50 parts of sodium amphibole mineral powder, 2-3 parts of stearic acid, 1-2 parts of lubricant, 10-15 parts of aluminum nitrate, 15-20 parts of vermiculite powder and 8-10 parts of white oil.

[0012] Further, the flame-retardant PA foaming material comprises the following raw material components by weight fraction:

[0013] 100 parts of PA6 resin, 3 parts of foaming material, 4 parts of toughening agent, 13 parts of flame retardant material, 45 parts of sodium amphibole mineral powder, 2.5 parts of stearic acid, 1.5 parts of lubricant, 13 parts of aluminum nitrate, 18 parts of vermiculite powder and 9 parts of white oil.

[0014] Further, the foaming material comprises at least one of hollow microsphere particles, sodium bicarbonate and AC foaming agent.

[0015] Further, the toughening agent comprises at least one of glass wool and bio-fiber.

[0016] Further, the flame retardant material comprises at least one of volcanic ash ore powder and magnesium oxide.

[0017] Further, the lubricant comprises at least one of PE and paraffin wax.

[0018] In a second aspect, the present application provides a preparation method of the flame-retardant PA foaming material, comprising the following steps:

[0019] The formula amount of PA6 resin, foaming material, toughening agent, flame retardant material, sodium amphibole mineral powder, stearic acid, lubricant, aluminum nitrate, vermiculite powder and white oil are mixed and then extruded to obtain the flame-retardant PA foaming material.

[0020] Further, the mixing temperature is 100-120℃; and the mixing rotation speed is 200-320r / min.

[0021] Preferably, before the extrusion treatment, the mixed raw material components are cooled to 50-60℃.

[0022] Preferably, the extrusion treatment temperature is 200-280℃.

[0023] In a third aspect, the present application provides an application of the flame-retardant PA foaming material or the preparation method in the preparation of flame-retardant PA foaming board.

[0024] Further, the flame-retardant PA foaming board is prepared by the following method:

[0025] The PA color film and PA wear-resistant layer are sequentially coated outside the flame-retardant PA foaming material, and then UV film coating and punching treatment are sequentially performed to obtain the flame-retardant PA foaming board.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The flame-retardant PA foam material provided by this invention uses PA6 resin as a base material. Polyamide PA is a material with good wear resistance and self-lubrication, low density, and meets the requirements of environmental protection and recyclability. Compared with PVC and PP materials, PA material has strong heat resistance and high strength, enabling this flame-retardant PA foam material to withstand greater pressure and impact, is not easily damaged, and can resist the erosion of chemical substances, maintaining stable performance. The flame-retardant PA foam material provided by this invention incorporates sodium amphibole mineral powder. In the high-temperature environment of the preparation process, the sodium amphibole mineral powder decomposes at high temperature to produce iron oxide, sodium oxide, and silicon dioxide, etc. When encountering a fire, the addition of fire extinguishing water during high-temperature fire suppression causes the decomposition products of the sodium amphibole mineral powder to be generated. In the chemical reaction, iron oxide, sodium oxide, and silicon dioxide react with water to produce sodium hydroxide, iron hydroxide, and silicic acid. Among these, iron hydroxide is stable and produced in small quantities, exhibiting certain fire-resistant properties. Sodium hydroxide reacts with aluminum nitrate in the raw material components to produce endothermic sodium nitrate and flame-retardant aluminum hydroxide. Combined with vermiculite powder in the raw material components, the vermiculite powder expands upon heating, increasing the reaction area and enhancing the flame-retardant area. The synergistic effect of sodium amphibole mineral powder, vermiculite powder, and aluminum nitrate improves the flame-retardant effect of this flame-retardant PA foam material. Silicic acid provides an acidic environment, accelerating the formation of aluminum hydroxide and sodium nitrate. The foaming material in the raw material components forms the foam structure, reduces the material density, and improves thermal and sound insulation properties. Detailed Implementation

[0028] Unless otherwise defined herein, the scientific and technical terms used in conjunction with this invention shall have the meanings commonly understood by one of ordinary skill in the art. The meaning and scope of terms shall be clear; however, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or foreign definitions. In this application, unless otherwise stated, the use of "or" means "and / or". Furthermore, the use of the term "comprising" and other forms is non-limiting.

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The first aspect of this invention provides a flame-retardant PA foam material, comprising the following raw material components:

[0031] PA6 resin, foaming material, sodium amphibole mineral powder, aluminum nitrate and vermiculite powder, and optional toughening agents, flame retardants, stearic acid, lubricants and white oil.

[0032] The flame-retardant PA foaming material provided by the application is a high-efficiency flame-retardant PA foaming plate, which takes PA6 resin as a base material. Polyamide PA is a material with good wear resistance and self-lubricating property, light density, environmental protection and renewable requirements, and high heat resistance compared with PVC and PP materials. PA material has high strength, so that the flame-retardant PA foaming material can withstand greater pressure and impact force and is not easy to be damaged. In addition, the flame-retardant PA foaming material can resist chemical erosion and maintain stable performance. In the flame-retardant PA foaming material provided by the application, sodium amphibole mineral powder (which is rich in sodium and a small amount of magnesium, aluminum and calcium) is added. In the high-temperature environment during preparation, the sodium amphibole mineral powder decomposes into iron oxide, sodium oxide and silicon dioxide at high temperature. When a fire occurs, the addition of fire extinguishing water causes the decomposition products of the sodium amphibole mineral powder to react. Iron oxide, sodium oxide and silicon dioxide react with water to form corresponding sodium hydroxide, iron hydroxide and silicic acid. Among them, iron hydroxide is stable and has a small amount, has certain fire resistance, sodium hydroxide can react with aluminum nitrate in the raw material component to produce heat-absorbing sodium nitrate and aluminum hydroxide with flame-retardant properties. In addition, the raw material component also contains vermiculite powder. The vermiculite powder (expansion temperature is 800-1000℃) expands under heat, enlarges the reaction area and increases the flame-retardant area. Under the synergistic effect of sodium amphibole mineral powder, vermiculite powder and aluminum nitrate, the flame-retardant effect of the flame-retardant PA foaming material is improved. Silicic acid provides an acidic environment to accelerate the formation of aluminum hydroxide and sodium nitrate. The foaming material in the raw material component is used to form a foam structure, reduce the density of the material and improve the heat and sound insulation performance.

[0033] In the flame-retardant PA foaming material provided by the application, the synergistic effect of sodium amphibole mineral powder and aluminum nitrate improves the flame-retardant effect. The addition of sodium amphibole mineral powder reduces the cost of the material. At the same time, the direct addition of oxides such as sodium oxide causes the oxides to react with the evaporated water of the material, which may cause the reaction to be advanced and directly react with the added aluminum nitrate. The reaction is not sufficient, which reduces the generation of flame-retardant substances and affects the flame-retardant effect.

[0034] In the flame-retardant PA foaming material provided by the application, stearic acid is used as an external lubricant, which is mainly used for lubricating the surface of machinery. In addition, the raw material component of the flame-retardant PA foaming material additionally contains a flame-retardant material, which can further improve the flame-retardant performance of the material.

[0035] In some preferred embodiments, the flame-retardant PA foaming material comprises the following raw material components by weight fraction:

[0036] 100 parts of PA6 resin, 2-4 parts of foaming material, 3-5 parts of toughening agent, 10-15 parts of flame-retardant material, 40-50 parts of sodium amphibole mineral powder, 2-3 parts of stearic acid, 1-2 parts of lubricant, 10-15 parts of aluminum nitrate, 15-20 parts of vermiculite powder and 8-10 parts of white oil.

[0037] The flame-retardant PA foamed material includes 2-4 parts of foaming agent, for example, 2 parts, 3 parts, 4 parts, etc.

[0038] The flame-retardant PA foamed material includes 3-5 parts of toughening agent, for example, 3 parts, 4 parts, 5 parts, etc.

[0039] The flame-retardant PA foamed material includes 10-15 parts of flame-retardant material, for example, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0040] The flame-retardant PA foamed material includes 40-50 parts of sodium tremolite mineral powder, for example, 40 parts, 45 parts, 50 parts, etc.

[0041] The flame-retardant PA foamed material includes 2-3 parts of stearic acid, for example, 2 parts, 2.5 parts, 3 parts, etc.

[0042] The flame-retardant PA foamed material includes 1-2 parts of lubricant, for example, 1 part, 1.5 parts, 2 parts, etc.

[0043] The flame-retardant PA foamed material includes 10-15 parts of aluminum nitrate, for example, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0044] The flame-retardant PA foamed material includes 15-20 parts of vermiculite powder, for example, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0045] The flame-retardant PA foamed material includes 8-10 parts of white oil, for example, 8 parts, 9 parts, 10 parts, etc.

[0046] In some preferred embodiments, the foaming agent includes at least one of hollow microsphere particles, sodium bicarbonate and AC foaming agent.

[0047] In some preferred embodiments, the toughening agent includes at least one of glass wool and bio-fiber.

[0048] In the present application, the toughening agent is used to improve the toughness of the material and prevent brittle fracture of the material when subjected to impact or stress.

[0049] In some preferred embodiments, the flame-retardant material includes at least one of volcanic ash ore powder and magnesium oxide.

[0050] In some preferred embodiments, the lubricant includes at least one of PE and paraffin wax.

[0051] In the present application, the lubricant is mainly aimed at lubrication between material molecular chains; white oil can soften the plate and reduce the brittleness of the substrate.

[0052] The second aspect of the present application provides a preparation method of the flame-retardant PA foaming material, comprising the following steps:

[0053] The formula amount of PA6 resin, foaming material, toughening agent, flame-retardant material, sodium amphibole mineral powder, stearic acid, lubricant, aluminum nitrate, vermiculite powder and white oil are mixed and then subjected to extrusion treatment to obtain the flame-retardant PA foaming material.

[0054] In some preferred embodiments, the temperature of the mixing is 100-120℃, for example, it can be 110℃, 115℃, 120℃, etc.; and the rotating speed of the mixing is 200-320r / min, for example, it can be 200r / min, 250r / min, 300r / min, 320r / min, etc.

[0055] In the present application, the mixing material of the raw material components is subjected to hot mixing by using a high-speed mixer, so as to promote the subsequent plasticization to be more complete.

[0056] Preferably, the mixed raw material components are cooled to 50-60℃ before the extrusion treatment, for example, it can be 50℃, 55℃, 60℃, etc.

[0057] Preferably, the temperature of the extrusion treatment is 200-280℃, for example, it can be 200℃, 250℃, 280℃, etc.

[0058] In the present application, the extrusion treatment is performed by using a double-screw extruder, which creates a high-temperature environment for the sodium amphibole, so that it is subjected to thermal decomposition (the products are iron oxide, sodium oxide and silicon dioxide, etc.), and when the high-temperature fire is extinguished, the iron oxide, sodium oxide and silicon dioxide react with water to generate corresponding sodium hydroxide, iron hydroxide and silicic acid, the sodium hydroxide can react with aluminum nitrate to produce heat-absorbing sodium nitrate (sodium nitrate can absorb heat when it meets water, so as to reduce the surface temperature) and good fireproofing aluminum hydroxide, so as to enhance the fire extinguishing effect and quickly achieve the fire extinguishing effect, and under the synergistic effect of the thermal expansion of the vermiculite powder, the chemical reaction area is enlarged, and the flame-retardant area and the flame-retardant effect are increased.

[0059] The preparation method of the flame-retardant PA foaming material provided by the present application uses polyamide PA as a base material and uses an extruder to extrude and manufacture a plate.

[0060] The third aspect of the present application provides an application of the flame-retardant PA foaming material or the preparation method in the preparation of flame-retardant PA foaming plate.

[0061] In the present application, the flame-retardant PA foamed board can be a board such as a floor, which replaces the current common way of directly adding magnesium hydroxide and other flame-retardant substances. Excessive addition of magnesium hydroxide and other flame-retardant substances will cause the physical properties of the board to deteriorate. The flame-retardant PA foamed board provided by the present application increases vermiculite powder that expands when exposed to high temperatures. When exposed to high temperatures in a fire, the vermiculite powder increases the flame-retardant area. In addition, under the synergistic cooperation and joint action of the sodium amphibole mineral powder, the vermiculite powder, and the aluminum nitrate, the flame-retardant effect of the flame-retardant PA foamed material is improved.

[0062] The flame-retardant PA foamed board provided by the present application has the following characteristics and advantages:

[0063] 1. The flame-retardant PA foamed board has strong load-bearing capacity. Compared with the limited load-bearing capacity of traditional floors, the flame-retardant PA foamed board can withstand greater pressure and impact force, enhance wear resistance, and reduce maintenance and replacement frequency.

[0064] 2. The flame-retardant PA foamed board has strong resistance to chemical substances. Traditional floors can be damaged when they come into contact with chemical reagents. The flame-retardant PA foamed board can be laid in places such as laboratories and chemical plants.

[0065] 3. The flame-retardant PA foamed board can effectively prevent moisture and water, and reduce the generation of static electricity.

[0066] 4. The flame-retardant PA foamed board adds flame-retardant materials such as volcanic ash mineral powder and white oil to make the board soft, reduce brittleness, and improve the flame-retardant effect.

[0067] 5. The flame-retardant PA foamed board has high wear resistance and toughness, and is impact-resistant, high-temperature-resistant, flame-retardant, and moisture-resistant, making up for the shortcomings of traditional PVC system floor physical properties.

[0068] 6. In terms of environmental protection and sustainability, the flame-retardant PA foamed board can be recycled and reused, reducing environmental pollution and resource waste, and having low VOC emissions, meeting environmental protection requirements.

[0069] In some preferred embodiments, the flame-retardant PA foamed board is prepared by the following method:

[0070] The PA color film and the PA wear-resistant layer are sequentially coated outside the flame-retardant PA foamed material, and then UV film coating and punching processing are sequentially performed to obtain the flame-retardant PA foamed board.

[0071] In the present application, foaming is achieved by adjusting the formula. The flame-retardant PA foamed material is first extruded, and then the PA color film and the PA wear-resistant layer are calendared to adjust the thickness to obtain the foamed board.

[0072] Further, the preparation process of the flame-retardant PA foamed board specifically includes the following steps:

[0073] (1) Take the corresponding weight parts of each raw material, put it into a high-speed mixer, mix and stir each raw material uniformly, stir at a speed of 200-320 r / min, and raise the temperature to 100-120℃;

[0074] (2) When the temperature of the material in the high-speed mixer reaches the setting temperature of the high-speed mixer, start the cold mixer, and unload the material in the high-speed mixer to the cold mixer. When the temperature of the material in the cold mixer drops to 50-60℃, unload the material in the cold mixer to the storage tank for standby;

[0075] (3) The mixed material after cold mixing is sent into a double-screw extruder for extrusion. The temperature of the extrusion barrel is controlled at 200-280℃, and the flame-retardant PA foaming material is prepared by extruding through a foaming die;

[0076] (4) Adjust the roller speed and roller distance of the calender roll, adjust the composite PA foaming base sheet to the required thickness, online hot bond the prepared PA foaming base material with PA color film and PA wear-resistant layer, and then cut to obtain a large plate.

[0077] (5) UV coating: select appropriate UV paint to coat the product obtained in step (4);

[0078] (6) Punching: the floor is punched into corresponding specification floor;

[0079] (7) Grooving: grooves for floor assembly are formed on the four sides of the floor.

[0080] (8) Packaging.

[0081] The application will be further described below by examples. Unless otherwise specified, the materials in the examples are prepared according to the existing method or directly purchased from the market.

[0082] Example 1

[0083] The example provides a flame-retardant PA foaming material, which comprises the following raw material components in parts by weight:

[0084] 100 parts of PA6 resin, 3 parts of foaming material (2 parts of hollow microsphere particles and 1 part of AC foaming agent), 4 parts of toughening agent (2 parts of glass wool and 2 parts of biological fiber), 13 parts of flame-retardant material (7 parts of volcanic ash ore powder and 6 parts of magnesium oxide), 45 parts of sodium amphibole mineral powder, 2.5 parts of stearic acid, 1.5 parts of lubricant (1 part of PE and 0.5 part of paraffin), 13 parts of aluminum nitrate, 18 parts of vermiculite powder and 9 parts of white oil.

[0085] Example 2

[0086] The example provides a flame-retardant PA foaming material, which comprises the following raw material components in parts by weight:

[0087] 100 parts of PA6 resin, 2 parts of foaming material (1 part of hollow microsphere particles and 1 part of AC foaming agent), 5 parts of toughening agent (3 parts of glass wool and 2 parts of bio-fiber), 10 parts of flame-retardant material (5 parts of volcanic ash ore powder and 5 parts of magnesium oxide), 50 parts of sodium amphibole mineral powder, 2 parts of stearic acid, 2 parts of lubricant (1 part of PE and 1 part of paraffin), 10 parts of aluminum nitrate, 20 parts of vermiculite powder and 8 parts of white oil.

[0088] Example 3

[0089] The example provides a flame-retardant PA foaming material, which comprises the following raw material components in parts by weight:

[0090] 100 parts of PA6 resin, 4 parts of foaming material (2 parts of hollow microsphere particles and 2 parts of AC foaming agent), 3 parts of toughening agent (2 parts of glass wool and 1 part of bio-fiber), 15 parts of flame-retardant material (8 parts of volcanic ash ore powder and 7 parts of magnesium oxide), 40 parts of sodium amphibole mineral powder, 3 parts of stearic acid, 1 part of lubricant (0.5 part of PE and 0.5 part of paraffin), 15 parts of aluminum nitrate, 15 parts of vermiculite powder and 10 parts of white oil.

[0091] Example 4

[0092] The example provides a flame-retardant PA foaming material, which is different from example 1 in that:

[0093] The sodium amphibole mineral powder is 51 parts, the aluminum nitrate is 9 parts, the vermiculite powder is 21 parts, and the remaining components are consistent with example 1.

[0094] Example 5

[0095] The example provides a flame-retardant PA foaming material, which is different from example 1 in that:

[0096] The sodium amphibole mineral powder is 39 parts, the aluminum nitrate is 16 parts, the vermiculite powder is 14 parts, and the remaining components are consistent with example 1.

[0097] Examples 6-10

[0098] Examples 6-10 provide a preparation method of a flame-retardant PA foaming material, which is prepared by using the raw material components of the flame-retardant PA foaming materials of examples 1-5 respectively, and comprises the following steps:

[0099] (1) The raw materials of the flame-retardant PA foaming materials of examples 1-5 are weighed respectively and put into a high-speed mixer, and the raw materials are mixed and stirred uniformly at a stirring speed of 260 r / min, and the temperature is raised to 110℃;

[0100] (2) When the temperature of the mixture reaches 110°C, the high-speed mixer is started and the mixture is discharged into the cold mixer. When the temperature of the mixture drops to 55°C, the mixture in the cold mixer is discharged into the storage tank for standby;

[0101] (3) The mixture in the cold mixer is sent into the double-screw extruder for extrusion. The temperature of the extrusion barrel is controlled at 240°C. The flame-retardant PA foaming material is prepared by extrusion through the foaming die.

[0102] Example 11

[0103] The example provides a preparation method of a flame-retardant PA foaming material. The flame-retardant PA foaming material raw material components in Example 1 are used for preparation. The method comprises the following steps:

[0104] (1) The flame-retardant PA foaming material raw materials in Example 1 are weighed and put into a high-speed mixer. The mixture is stirred at a speed of 200 r / min. The temperature is raised to 120°C. The raw materials are mixed and stirred uniformly.

[0105] (2) When the temperature of the mixture reaches 110°C, the high-speed mixer is started and the mixture is discharged into the cold mixer. When the temperature of the mixture drops to 55°C, the mixture in the cold mixer is discharged into the storage tank for standby;

[0106] (3) The mixture in the cold mixer is sent into the double-screw extruder for extrusion. The temperature of the extrusion barrel is controlled at 240°C. The flame-retardant PA foaming material is prepared by extrusion through the foaming die.

[0107] Example 12

[0108] The example provides a preparation method of a flame-retardant PA foaming material. The flame-retardant PA foaming material raw material components in Example 1 are used for preparation. The method comprises the following steps:

[0109] (1) The flame-retardant PA foaming material raw materials in Example 1 are weighed and put into a high-speed mixer. The mixture is stirred at a speed of 200 r / min. The temperature is raised to 120°C. The raw materials are mixed and stirred uniformly.

[0110] (2) When the temperature of the mixture reaches 110°C, the high-speed mixer is started and the mixture is discharged into the cold mixer. When the temperature of the mixture drops to 55°C, the mixture in the cold mixer is discharged into the storage tank for standby;

[0111] (3) The mixture in the cold mixer is sent into the double-screw extruder for extrusion. The temperature of the extrusion barrel is controlled at 240°C. The flame-retardant PA foaming material is prepared by extrusion through the foaming die.

[0112] Application Examples 1-7

[0113] Application Example 1-7 provides a method for preparing a flame-retardant PA foamed board, which is prepared by using the flame-retardant PA foamed material prepared in Examples 6-12, respectively, and comprises the following steps:

[0114] (a) Adjust the roller speed and roller distance of the calender roller, and respectively adjust the flame-retardant PA foamed material prepared in Examples 6-12 to the required thickness, and then on-line hot bond the prepared PA foamed substrate with PA color film and PA wear-resistant layer, and then obtain a large plate by fixed-length cutting.

[0115] (b) UV film coating: select appropriate UV paint (specifically, smoke-proof and oil-proof paint) to perform UV film coating on the product obtained in step (a);

[0116] (c) Punching: punch the floor into corresponding specification floor;

[0117] (d) Grooving: groove the four faces of the floor for floor assembly.

[0118] (e) Packaging.

[0119] Comparative Example 1

[0120] This comparative example provides a flame-retardant PA foamed material, which is different from Example 1 in that the sodium amphibole mineral powder and aluminum nitrate are not contained in the components, and the portion of the flame-retardant material is increased to 71 parts.

[0121] Comparative Example 2

[0122] This comparative example provides a flame-retardant PA foamed material, which is different from Example 1 in that the vermiculite powder is not contained in the components, and the portion of the flame-retardant material is increased to 31 parts.

[0123] Comparative Example 3

[0124] This comparative example provides a flame-retardant PA foamed material, which is different from Example 1 in that the sodium amphibole mineral powder is not contained in the components, and 45 parts of sodium oxide is added.

[0125] Comparative Example 4

[0126] This comparative example provides a flame-retardant PA foamed material, which is different from Example 1 in that the PA6 resin is replaced by PVC material.

[0127] Comparative Example 5

[0128] This comparative example provides a flame-retardant PA foamed material, which is different from Example 1 in that the PA6 resin is replaced by PP material.

[0129] Comparative Examples 6-10

[0130] The present comparative example provides a preparation method of a flame-retardant PA foamed material, which is prepared by using the flame-retardant PA foamed material raw material components of Comparative Examples 1-6, and the preparation method is consistent with that of Example 10.

[0131] Comparative Application Examples 1-5

[0132] Comparative Application Examples 1-5 provide a preparation method of a flame-retardant PA foamed plate, which is prepared by using the flame-retardant PA foamed materials prepared in Comparative Examples 6-10, and the preparation method is consistent with that of Application Example 1.

[0133] Test Examples

[0134] Test samples: The flame-retardant PA foamed plates prepared in Application Examples 1-7 and the flame-retardant PA foamed plates prepared in Comparative Application Examples 1-5.

[0135] Test method:

[0136] Flame-retardant performance detection: The vertical combustion test of the PA foamed sample is carried out by using a CZF II type vertical combustion instrument. The sample size is 125.0 mm x 13.0 mm x 3.0 mm, and the test standard is GB / T2408-2008. According to the combustion time of the sample and the ignition of the absorbent cotton, it is classified as V 0, V 1, V 2, and NR.

[0137] Neutral salt spray test: Dissolve chemically pure sodium chloride in distilled water to prepare a 5%±0.1% salt solution with a pH value of 6.5-7.2. The test box atomizes the salt solution, and the test sample is at an angle of 15-30° with the vertical surface, so that the test sample is continuously exposed to salt spray for a test period of 168 h. After the test is completed, the sample is naturally dried in the room for 30 min, then the residual salt spray is gently washed off with clean water, and the appearance of the sample is observed.

[0138] Hardness detection: The plate is cut into test samples for testing by using a LX-D type hardness tester with a range of 70-90.

[0139] The test results are shown in Table 1.

[0140] Table 1

[0141]

[0142]

[0143] From the data in Table 1, it can be found that the PA foamed floor prepared in application examples 1-7 has certain flame retardancy, but the flame retardant effect of application example 1 is the best, and the corrosion resistance is stronger, the product of application example 1-5 will generate smaller melt drops, which shows that the flame retardant effect is poor; and in the comparative application examples, sodium oxide is directly added or PA is replaced, the flame retardant effect is greatly reduced, which shows that in the combination of PA resin and nanoscale flash stone and other flame retardant materials in the application, too much flame retardant material itself is not needed, nanoscale flash stone and vermiculite play a key role in chemical reaction to improve the flame retardant effect; in the salt spray test and surface hardness, the addition of PA resin can improve the chemical corrosion resistance and surface hardness of the floor, the effects of the pvc and pp formulations in comparative application examples 4 and 5 are poor; in the application, the filling of nanoscale flash stone not only reduces the cost, but also reduces the amount of direct flame retardant, and achieves the purpose of high-efficiency flame retardation under the condition of reducing the cost.

[0144] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flame-retardant PA foamed material, characterized by, The raw material components include: PA6 resin, foaming material, sodium amphibole mineral powder, aluminum nitrate and vermiculite powder, and optionally toughening agent, flame retardant material, stearic acid, lubricant and white oil; 100 parts of PA6 resin, 2-4 parts of foaming material, 3-5 parts of toughening agent, 10-15 parts of flame retardant material, 40-50 parts of sodium amphibole mineral powder, 2-3 parts of stearic acid, 1-2 parts of lubricant, 10-15 parts of aluminum nitrate, 15-20 parts of vermiculite powder and 8-10 parts of white oil; The flame retardant material includes at least one of volcanic ash ore powder and magnesium oxide; The lubricant includes at least one of PE and paraffin wax.

2. The flame-retardant PA foamed material according to claim 1, characterized in that, The raw material components include: 100 parts of PA6 resin, 3 parts of foaming material, 4 parts of toughening agent, 13 parts of flame retardant material, 45 parts of sodium amphibole mineral powder, 2.5 parts of stearic acid, 1.5 parts of lubricant, 13 parts of aluminum nitrate, 18 parts of vermiculite powder and 9 parts of white oil.

3. The flame retardant PA foamed material according to claim 1, characterized in that, The foaming material includes at least one of hollow microsphere particles, sodium bicarbonate and AC foaming agent; The toughening agent includes at least one of glass wool and bio-fiber.

4. Process for the production of flame-retardant PA foams according to any one of claims 1 to 3, characterized in that, The method includes the following steps: The formula amount of PA6 resin, foaming material, toughening agent, flame retardant material, sodium amphibole mineral powder, stearic acid, lubricant, aluminum nitrate, vermiculite powder and white oil are mixed and then subjected to extrusion treatment to obtain the flame retardant PA foaming material.

5. The process for the preparation of flame retarded PA foams according to claim 4, characterized in that, The mixing temperature is 100-120℃; the mixing rotation speed is 200-320r / min.

6. The process for preparing a flame-retardant PA foamed material according to claim 4, characterized in that, Before the extrusion treatment, the mixed raw material components are cooled to 50-60℃.

7. The process for preparing a flame-retardant PA foamed material according to claim 4, characterized in that, The extrusion treatment temperature is 200-280℃.

8. Use of the flame retardant PA foaming material according to any one of claims 1-3 in the preparation of a flame retardant PA foaming board.

9. Use according to claim 8, characterized in that, The flame retardant PA foaming board is prepared by the following method: A PA color film and a PA wear-resistant layer are sequentially coated on the flame retardant PA foaming material, and then UV film coating and punching treatment are sequentially performed to obtain the flame retardant PA foaming board.

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