Ultra-light foamed cotton and its preparation method and application

Abstract

The present invention relates to an ultralight foamed cotton and a preparation method and application thereof, comprising the following raw materials in parts: 25-50 parts of EPDM rubber 3092, 80-100 parts of mixed material B, 5.2-6.5 parts of sulfur powder as a vulcanizing agent, 3.2-4.5 parts of a vulcanizing aid, 6-8 parts of a foaming agent, 10-12 parts of zinc oxide, 1-5 parts of a peroxide vulcanizing agent, and 10-20 parts of an activating agent; the mixed material B comprises 80 parts of a mixed powder A, 80-100 parts of EPDM rubber 3092, 10-20 parts of a fumed silica, and 20-30 parts of a borane coupling agent; the mixed powder A comprises 80 parts of EPDM2470C, 15-25 parts of a maleic anhydride isobutylene polymer, and 20-30 parts of a styrene maleic anhydride polymer. The ultralight foamed cotton of the present application is ultralight, and the density can be realized at 100kg / m 3 The weight is reduced by 45%, making outdoor equipment easier to carry and meeting the lightweight needs of industries such as diving and water rescue.

Description

Technical Field

[0001] The invention relates to the technical field of foaming materials, in particular to ultra-light foam cotton and a preparation method and application thereof. Background Art

[0002] Ethylene propylene diene monomer (EPDM) is a terpolymer of ethylene, propylene and non-conjugated diene. The most important characteristic of EPDM is its excellent resistance to oxidation, ozone and corrosion. Over the years, many high-molecular materials with good comprehensive performance have been obtained by means of blending, copolymerization, filling, grafting, reinforcement and molecular compounding. The performance of EPDM has also been greatly improved through modification, thus expanding the application range of EPDM.

[0003] The main base material of diving suits, water rescue boats, etc. is chloroprene rubber closed-cell foam material. The density of this kind of chloroprene rubber closed-cell foam material is usually 180kg / m 3 As mentioned above, the diving suit is too heavy, which does not provide a good wearing experience for divers. In addition, the thickness of a diving suit is usually around 5mm. If the thickness is reduced further, it will be difficult for divers to maintain their body temperature. In addition, the diving suit has poor wear resistance and is prone to holes and damage.

[0004] Moreover, in the automotive field, the main base material of sealing and shock-absorbing foam is EPDM foam material. However, the density of EPDM foam material currently used in the automotive field is usually 130kg / m 3 The above factors make it difficult to optimize the overall weight of the car, which is not suitable for new energy development indicators. Therefore, the density of EPDM rubber needs to be improved.

[0005] In view of the fact that the above-mentioned EPDM rubber has the problem of high density in various fields, this case came into being. Summary of the invention

[0006] The present invention provides an ultra-light foam cotton and a preparation method and application thereof, so as to solve the problem that the above-mentioned EPDM rubber has a relatively high density in various fields.

[0007] The present invention adopts the following technical solution:

[0008] An ultra-light foamed cotton, comprising the following raw materials in parts:

[0009]

[0010] The mixed material B comprises 80 parts of mixed powder A, 80-100 parts of EPDM rubber 3092, 10-20 parts of fumed silica, and 20-30 parts of borane coupling agent;

[0011] The mixed powder A comprises 80 parts of EPDM2470C, 15-25 parts of maleic anhydride isobutylene polymer, and 20-30 parts of styrene maleic anhydride polymer.

[0012] Furthermore, the preparation method of the mixed powder A is as follows:

[0013] 80 parts of the EPDM rubber EPDM2470C, 15-25 parts of the maleic anhydride isobutylene polymer, and 20-30 parts of the styrene maleic anhydride polymer were stirred in a planetary stirring cylinder at 30 revolutions per minute for 30 minutes and allowed to stand for 24 hours to obtain a mixed powder A.

[0014] Furthermore, the preparation method of the mixed powder B is as follows:

[0015] 80 parts of the mixed powder A, 80-100 parts of the EPDM rubber 3092, 10-20 parts of the fumed silica, and 20-30 parts of the borane coupling agent are put into an internal mixer, and the upper top bolt is pressed down to two-thirds of the displacement distance. After a period of reaction, all the internal mixer upper top bolts are pressed down, pressurized, raised, and turned over; the internal mixer upper top bolt is pressed down again, raised, and the upper top bolt is pressed down 6-8 times to knead; during the kneading process, cooling water is continuously added to cool down, and the material is dumped when the material temperature in the internal mixer chamber reaches 100-120°C to obtain internal mixer rubber; the internal mixer rubber is put into a mixing machine, and cooling water is continuously passed through the rollers of the mixing machine to control the thickness of the rollers, if it is too thin, cool down, split, and stand to obtain a mixed rubber material B.

[0016] Furthermore, the foaming peroxide curing agent is 1,4-di-tert-butylperoxyisopropylbenzene.

[0017] Furthermore, the above-mentioned foaming agent is the foaming agent azodicarbonamide.

[0018] Furthermore, the above-mentioned vulcanization aid is N-cyclohexyl-2-benzothiazole sulfenamide.

[0019] Furthermore, the above-mentioned active agent is selected from one or more of stearic acid and fatty acids.

[0020] A method for preparing ultralight foam cotton comprises the following steps:

[0021] Step 1, 5.2-6.5 parts of sulfur powder, a vulcanizing agent, 3.2-4.5 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 6-8 parts of a foaming agent, 10-12 parts of zinc oxide, 1-5 parts of a peroxide vulcanizer, and 10-20 parts of an activator are put into a mixing chamber, and the upper top bolt is not pressed down, and the mixture is stirred for a period of time, and then 80-100 parts of a mixed material B and 25-50 parts of EPDM rubber 3092 are put into the mixing chamber, and after the first pressurization for a period of time, the upper top bolt is raised and turned over; after the upper top bolt is pressed down again for a period of time, the upper top bolt is raised, and the upper top bolt is pressed down 6-8 times, and the upper top bolt is raised for kneading; during the kneading process, cooling water is continuously added to cool down, and the material is poured when the mixed material reaches 110° C. to obtain a mixed rubber;

[0022] Step 2, putting the above-mentioned mixed rubber into an open mill, continuously passing cooling water through the rollers of the open mill, setting the parameters of the rollers, the blanking thickness after the first rolling is 4 mm, the blanking thickness after the second rolling is 1.5 mm, cooling and cooling after the second rolling, dividing, standing for 24 hours, to obtain a mixture, the temperature of the mixture is 40° C.-60° C.;

[0023] Step 3, the mixture with a temperature of 40°C-60°C is put into the calender again, the rollers of the calender are continuously passed with cooling water, the rolling thickness parameter of the rollers is set to 0.8mm, the mixture is calendered with a thickness of 0.8mm, and left to cool for 24 hours to obtain a rubber compound with a material temperature below 30°C;

[0024] Step 4, putting the above-mentioned mixed rubber into an open mill, controlling the temperature at 70° C.-75° C., and mixing the raw materials of each component further and preheating the temperature to obtain a preheated material;

[0025] Step 5, putting the preheated material into an extruder for extrusion molding, cutting, and standing to cool for 24 hours to obtain a film, the film temperature of which is lower than 50° C.;

[0026] Step 6: Put the above film into the vulcanizer, and the oil pressure parameter is 1500±30kg / cm 2 The temperature parameter in the mold is 120℃-135℃, the rubber is vulcanized for 60-80min, the temperature is lowered and the pressure is released to obtain a primary vulcanized foam material;

[0027] Step 7: transfer the above-mentioned primary vulcanized foaming material into the foaming machine for further foaming, and set the oil pressure parameter to 50±5kg / cm 2 The temperature parameter in the mold is 150℃-165℃, the secondary foaming is carried out for 50-60min, the temperature is lowered and the pressure is released to obtain the secondary foaming material.

[0028] An application of ultralight foam cotton, comprising a foam product, wherein the foam product is made of the ultralight foam cotton material according to claim 1.

[0029] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following advantages:

[0030] 1. The ultra-light foam cotton of this application is ultra-light, and the density can reach 100kg / m 3 The weight is reduced by 45%, making outdoor equipment lighter to carry. When worn, it reduces exercise load and body energy consumption, making it easier to maintain physical strength and significantly improving movement flexibility. The ultra-light foam used in diving, sailing, sports and other fields can be 51"*83" and 51"*130" in size, reducing the seams of finished garments and improving the overall appearance quality of the finished product, which can meet the lightweight needs of diving, water rescue and other industries.

[0031] 2. The ultra-light foam cotton of the present application has good resilience, is not easy to wrinkle or produce creases when folded and stacked during daily storage, or unfolded for transportation, and can be quickly flattened when unfolded at the fold line; has strong resistance to flexion during movement and bending, and is more comfortable and smooth to wear.

[0032] 3. The ultra-light foam cotton of this application is ultra-light, and the density can reach 100kg / m 3 The weight is reduced by 30%, which reduces kinetic energy consumption; parts are not easily deformed or wrinkled during punching and die-cutting, and the parts are more precise; the ultra-light foam used in parts such as automotive electronics and new energy, low-altitude aircraft, etc. can be 1*2 meters in size, which is a good combination of lightweight and physical properties. DETAILED DESCRIPTION

[0033] Embodiment 1:

[0034] An ultra-light foamed cotton, comprising the following raw materials in parts:

[0035]

[0036] The mixed material B comprises 80 parts of mixed powder A, 80 parts of EPDM rubber 3092, 10 parts of fumed silica, and 20 parts of borane coupling agent;

[0037] The mixed powder A comprises 80 parts of EPDM2470C, 15 parts of maleic anhydride isobutylene polymer, and 20 parts of styrene maleic anhydride polymer.

[0038] The preparation method of the mixed powder A is as follows: 80 parts of the EPDM rubber EPDM2470C, 15 parts of the maleic anhydride isobutylene polymer, and 20 parts of the styrene maleic anhydride polymer are stirred in a planetary stirring cylinder at 30 revolutions per minute for 30 minutes, and allowed to stand for 24 hours to obtain the mixed powder A.

[0039] The preparation method of the mixed powder B is as follows:

[0040] 80 parts of the mixed powder A, 80 parts of the EPDM rubber 3092, 10 parts of the fumed silica and 20 parts of the borane coupling agent are put into an internal mixer, and the upper top bolt is pressed down by two-thirds of the displacement distance. After a period of reaction, all the upper top bolts of the internal mixer are pressed down, pressurized, raised and turned over; the upper top bolt of the internal mixer is pressed down again, raised, and the upper top bolt is pressed down and kneaded 6-8 times repeatedly; during the kneading process, cooling water is continuously added to cool down, and the material is dumped when the material temperature in the internal mixer reaches 100°C to obtain a mixed rubber; the mixed rubber is put into a mixing machine, and cooling water is continuously passed through the rollers of the mixing machine to control the thickness of the rollers, if it is too thin, the temperature is reduced, the material is divided and allowed to stand to obtain a mixed rubber B.

[0041] The foaming peroxide vulcanizing agent is 1,4-di-tert-butyl peroxyisopropylbenzene. The foaming agent is azodicarbonamide. The vulcanizing aid is N-cyclohexyl-2-benzothiazole sulfenamide. The activating agent is stearic acid and fatty acid.

[0042] A method for preparing ultralight foam cotton comprises the following steps:

[0043] Step 1, 5.2 parts of sulfur powder, a vulcanizing agent, 3.2 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 6 parts of a foaming agent, 10 parts of zinc oxide, 1 part of a peroxide vulcanizing agent, and 10 parts of an activator are put into a mixing chamber, and the upper top bolt is not pressed down, and stirred for a period of time, and then 120 parts of a mixed material B and 25 parts of EPDM rubber 3092 are added. After the first pressurization for a period of time, the upper top bolt is raised and turned over; after the upper top bolt is pressed down again for a period of time, the upper top bolt is raised, and the upper top bolt is pressed down 6-8 times, and the upper top bolt is raised for kneading; during the kneading process, cooling water is continuously added to cool down, and the material is poured when the mixed material reaches 110° C. to obtain a mixed rubber;

[0044] Step 2, putting the above-mentioned mixed rubber into an open mill, continuously passing cooling water through the rollers of the open mill, setting the parameters of the rollers, the thickness of the first rolling is 4 mm, the thickness of the second rolling is 1.5 mm, cooling and cooling after the second rolling, dividing, and standing for 24 hours to obtain a mixture, the temperature of the mixture is 40° C.;

[0045] Step 3, the mixture at a temperature of 40° C. is put into the calender again, the rollers of the calender are continuously passed with cooling water, the rolling thickness parameter of the rollers is set to 0.8 mm, the mixture is calendered to a thickness of 0.8 mm, and left to stand for 24 hours to cool to obtain a mixed rubber, the material temperature of which is lower than 30° C.;

[0046] Step 4, putting the above-mentioned mixed rubber into an open mill, controlling the temperature at 70° C., and mixing the raw materials of each component further and preheating the temperature to obtain a preheated material;

[0047] Step 5, putting the preheated material into an extruder for extrusion molding, cutting, and standing to cool for 24 hours to obtain a film, the film temperature of which is lower than 50° C.;

[0048] Step 6: Put the above film into the vulcanizer, and the oil pressure parameter is 1470kg / cm 2 The temperature parameter in the mold is 120°C, the rubber is vulcanized for 60 minutes, the temperature is lowered, and the pressure is released to obtain a primary vulcanized foam material;

[0049] Step 7: transfer the above-mentioned primary vulcanized foaming material into the foaming machine for further foaming, and set the oil pressure parameter to 45kg / cm 2 The temperature parameter in the mold is 150℃, the secondary foaming is carried out for 50 minutes, the temperature is lowered and the pressure is released to obtain the secondary foaming material.

[0050] An application of ultralight foam cotton comprises a foam product. The ultralight foam product is a diving suit, which is made of ultralight foam cotton material.

[0051] The ultra-light foam cotton of this application is subjected to performance tests, as follows:

[0052]

[0053] It can be seen from the data in the above table that the ultra-light foam of the present application is not easy to wrinkle or crease, has strong resistance to flexion during movement and bending, and is superior to CR foam and closed-cell EPDM foam.

[0054] Embodiment 2:

[0055] An ultra-light foamed cotton, comprising the following raw materials in parts:

[0056]

[0057] The mixed material B comprises 80 parts of mixed powder A, 100 parts of EPDM rubber 3092, 20 parts of fumed silica, and 30 parts of borane coupling agent;

[0058] The mixed powder A comprises 80 parts of EPDM2470C, 25 parts of maleic anhydride isobutylene polymer, and 30 parts of styrene maleic anhydride polymer.

[0059] The preparation method of the mixed powder A is as follows:

[0060] 80 parts of the EPDM rubber EPDM2470C, 25 parts of the maleic anhydride isobutylene polymer, and 30 parts of the styrene maleic anhydride polymer were stirred in a planetary stirring cylinder at 30 revolutions per minute for 30 minutes and allowed to stand for 24 hours to obtain a mixed powder A.

[0061] The preparation method of the mixed powder B is as follows:

[0062] 80 parts of the mixed powder A, 80 parts of the EPDM rubber 3092, 20 parts of the fumed silica and 30 parts of the borane coupling agent are put into an internal mixer, and the upper top bolt is pressed down to two-thirds of the displacement distance. After a period of reaction, all the upper top bolts of the internal mixer are pressed down, pressurized, raised and turned over; the upper top bolt of the internal mixer is pressed down again, raised, and the step of pressing down the upper top bolt and kneading is repeated 6-8 times; during the kneading process, cooling water is continuously added to cool down, and the material is dumped when the material temperature in the internal mixer reaches 120°C to obtain internal rubber; the internal rubber is put into a mixing machine, and cooling water is continuously passed through the rollers of the mixing machine to control the thickness of the rollers, if it is too thin, the temperature is reduced, the material is divided and allowed to stand to obtain a mixed rubber material B.

[0063] The foaming peroxide vulcanizing agent is 1,4-di-tert-butyl peroxyisopropylbenzene. The foaming agent is azodicarbonamide. The vulcanizing aid is N-cyclohexyl-2-benzothiazole sulfenamide. The activating agent is stearic acid.

[0064] A method for preparing ultralight foam cotton comprises the following steps:

[0065] Step 1, 6.5 parts of sulfur powder, a vulcanizing agent, 4.5 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 8 parts of a foaming agent, 12 parts of zinc oxide, 5 parts of a peroxide vulcanizer, and 20 parts of an activator are put into a mixing chamber, and the upper top bolt is not pressed down, and the mixture is stirred for a period of time, and then 150 parts of a mixed material B and 50 parts of EPDM rubber 3092 are put into the mixing chamber, and after the first pressurization for a period of time, the upper top bolt is raised and turned over; after the upper top bolt is pressed down again for a period of time, the upper top bolt is raised, and the upper top bolt is pressed down and raised for 6-8 times repeatedly, and the kneading step of kneading is repeated; during the kneading process, cooling water is continuously added to cool down, and the material is poured when the mixed material reaches 110° C. to obtain a mixed rubber;

[0066] Step 2, putting the above-mentioned mixed rubber into an open mill, continuously passing cooling water through the rollers of the open mill, setting the parameters of the rollers, the thickness of the first rolling is 4 mm, the thickness of the second rolling is 1.5 mm, cooling and cooling after the second rolling, dividing, standing for 24 hours, to obtain a mixture, the temperature of the mixture is 60° C.;

[0067] Step 3, the mixture at a temperature of 60° C. is put into the calender again, the rollers of the calender are continuously passed with cooling water, the rolling thickness parameter of the rollers is set to 0.8 mm, the mixture is calendered to a thickness of 0.8 mm, and left to stand for 24 hours to cool to obtain a mixed rubber, the material temperature of which is lower than 30° C.;

[0068] Step 4, putting the above-mentioned mixed rubber into an open mill, controlling the temperature at 75° C., and mixing the raw materials of each component further and preheating them to obtain a preheated material;

[0069] Step 5, putting the preheated material into an extruder for extrusion molding, cutting, and standing to cool for 24 hours to obtain a film, the film temperature of which is lower than 50° C.;

[0070] Step 6: Put the above film into the vulcanizer, and the oil pressure parameter is 1530kg / cm 2 The temperature parameter in the mold is 135°C, the rubber is vulcanized for 80 minutes, the temperature is lowered, and the pressure is released to obtain a primary vulcanized foam material;

[0071] Step 7: transfer the above-mentioned primary vulcanized foaming material into the foaming machine for further foaming, and set the oil pressure parameter to 55kg / cm 2 The temperature parameter in the mold is 165℃, the secondary foaming is carried out for 60 minutes, the temperature is lowered and the pressure is released to obtain the secondary foaming material.

[0072] An application of ultralight foam cotton includes foam products. The ultralight foam products are automobile parts and diving suits, which are made of ultralight foam cotton material.

[0073] The ultra-light foam cotton of this application is subjected to performance tests, as follows:

[0074]

[0075] It can be seen from the data in the above table that the ultra-light foam of the present application is not easy to wrinkle, has high elongation, is not easy to deform or wrinkle when punching and die-cutting as parts, the parts are more precise, and the performance is better than that of closed-cell EPDM foam.

[0076] Embodiment 3:

[0077] An ultra-light foamed cotton, comprising the following raw materials in parts:

[0078]

[0079] The mixed material B comprises 80 parts of mixed powder A, 90 parts of EPDM rubber 3092, 15 parts of fumed silica, and 25 parts of borane coupling agent;

[0080] The mixed powder A comprises 80 parts of EPDM2470C, 20 parts of maleic anhydride isobutylene polymer, and 25 parts of styrene maleic anhydride polymer.

[0081] The preparation method of the mixed powder A is as follows: 80 parts of the EPDM rubber EPDM2470C, 20 parts of the maleic anhydride isobutylene polymer, and 25 parts of the styrene maleic anhydride polymer are stirred in a planetary stirring cylinder at 30 revolutions per minute for 30 minutes, and allowed to stand for 24 hours to obtain the mixed powder A.

[0082] The preparation method of the mixed powder B is as follows: 80 parts of the mixed powder A, 90 parts of the EPDM rubber 3092, 15 parts of the fumed silica, and 25 parts of the borane coupling agent are put into an internal mixer, and the upper top bolt is pressed down by two-thirds of the displacement distance. After a period of reaction, all the upper top bolts of the internal mixer are pressed down, pressurized, raised, and turned over; the upper top bolt of the internal mixer is pressed down again, and the upper top bolt is raised, and the step of pressing down the upper top bolt and kneading is repeated 6-8 times; during the kneading process, cooling water is continuously added to cool down, and the material is turned down when the material temperature in the internal mixer chamber reaches 120°C to obtain a mixed rubber; the mixed rubber is put into a mixing machine, and cooling water is continuously passed through the rollers of the mixing machine to control the thickness of the rollers, if it is too thin, the temperature is reduced, the material is divided, and the material is left to stand to obtain a mixed rubber B.

[0083] The foaming peroxide vulcanizing agent is 1,4-di-tert-butyl peroxyisopropylbenzene. The foaming agent is azodicarbonamide. The vulcanizing aid is N-cyclohexyl-2-benzothiazole sulfenamide. The activating agent is fatty acid.

[0084] A method for preparing ultralight foam cotton comprises the following steps:

[0085] Step 1, 5.5 parts of sulfur powder, a vulcanizing agent, 3.5 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 7 parts of a foaming agent, 11 parts of zinc oxide, 3 parts of a peroxide vulcanizer, and 15 parts of an activator are put into a mixing chamber, and the upper top bolt is not pressed down, and stirred for a period of time, and then 90 parts of a mixed material B and 30 parts of EPDM rubber 3092 are added. After the first pressurization for a period of time, the upper top bolt is raised and turned over; after the upper top bolt is pressed down again for a period of time, the upper top bolt is raised, and the upper top bolt is pressed down 6-8 times, and the upper top bolt is raised for kneading; during the kneading process, cooling water is continuously added to cool down, and the material is poured when the mixed material reaches 110° C. to obtain a mixed rubber;

[0086] Step 2, putting the above-mentioned mixed rubber into an open mill, continuously passing cooling water through the rollers of the open mill, setting the parameters of the rollers, the thickness of the first rolling is 4 mm, the thickness of the second rolling is 1.5 mm, cooling and cooling after the second rolling, dividing, standing for 24 hours, to obtain a mixture, the temperature of the mixture is 40° C.-60° C.;

[0087] Step 3, the mixture at a temperature of 60° C. is put into the calender again, the rollers of the calender are continuously passed with cooling water, the rolling thickness parameter of the rollers is set to 0.8 mm, the mixture is calendered to a thickness of 0.8 mm, and left to stand for 24 hours to cool to obtain a mixed rubber, the material temperature of which is lower than 30° C.;

[0088] Step 4, putting the above-mentioned mixed rubber into an open mill, controlling the temperature at 75° C., and mixing the raw materials of each component further and preheating them to obtain a preheated material;

[0089] Step 5, putting the preheated material into an extruder for extrusion molding, cutting, and standing to cool for 24 hours to obtain a film, the film temperature of which is lower than 50° C.;

[0090] Step 6: Put the above film into the vulcanizer, and the oil pressure parameter is 1500kg / cm 2 The temperature parameter in the mold is 135°C, the rubber is vulcanized for 80 minutes, the temperature is lowered, and the pressure is released to obtain a primary vulcanized foam material;

[0091] Step 7: transfer the above-mentioned primary vulcanized foaming material into the foaming machine for further foaming, and set the oil pressure parameter to 50kg / cm 2 The temperature parameter in the mold is 150℃, the secondary foaming is carried out for 60 minutes, the temperature is lowered and the pressure is released to obtain the secondary foaming material.

[0092] An ultralight foam product is a water rescue boat, and the water rescue boat is made of the ultralight foam cotton material prepared by the ultralight foam cotton preparation method.

[0093] The ultra-light foam cotton of this application is subjected to performance tests, as follows:

[0094]

[0095] It can be seen from the data in the above table that the ultra-light foam cotton of the present application is not easy to wrinkle and has high elongation, which can meet the lightweight needs of industries such as diving and water rescue.

[0096] In addition, the ultra-light foamed product of the present application can be applied to sports goods, diving suits, sailing suits, surfing suits, water sports, electronics, automobiles, new energy, and low-altitude aircraft, but is not limited to the above fields.

[0097] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. An ultra-light foam, characterized in that: The following ingredients are included in parts: The mixed material B comprises 80 parts of mixed powder A, 80-100 parts of EPDM rubber 3092, 10-20 parts of fumed silica, and 20-30 parts of borane coupling agent; The mixed powder A comprises 80 parts of EPDM2470C, 15-25 parts of maleic anhydride isobutylene polymer, and 20-30 parts of styrene maleic anhydride polymer.

2. The ultra-light foam according to claim 1, characterized in that: The preparation method of the mixed powder A is: 80 parts of the EPDM rubber EPDM2470C, 15-25 parts of the maleic anhydride isobutylene polymer, and 20-30 parts of the styrene maleic anhydride polymer were stirred in a planetary stirring cylinder at 30 revolutions per minute for 30 minutes, and allowed to stand for 24 hours to obtain a mixed powder A.

3. The ultra-light foam according to claim 2, characterized in that: The preparation method of the mixed powder B is: 80 parts of the mixed powder A, 80-100 parts of the EPDM rubber 3092, 10-20 parts of the fumed silica, and 20-30 parts of the borane coupling agent are put into an internal mixer, and the upper top bolt is pressed down by two-thirds of the displacement distance. After a period of reaction, all the internal mixer upper top bolts are pressed down, pressurized, raised, and turned over; the internal mixer upper top bolt is pressed down again, raised, and the upper top bolt is pressed down for 6-8 times; during the kneading process, cooling water is continuously added to cool down, and the material is dumped when the material temperature in the internal mixer chamber reaches 100-120° C. to obtain internal mixer rubber; the internal mixer rubber is put into a mixing machine, and cooling water is continuously passed through the rollers of the mixing machine to control the thickness of the rollers, if it is too thin, the temperature is reduced, the material is divided, and the material is allowed to stand to obtain a mixed rubber material B.

4. The ultra-light foam cotton according to claim 3, characterized in that: The foaming peroxide curing agent is 2,4-di-tert-butyl peroxide isopropylbenzene.

5. The ultra-light foam cotton according to claim 3, characterized in that: The foaming agent is azodicarbonamide.

6. The ultra-light foam cotton according to claim 3, characterized in that: The vulcanization aid is N-cyclohexyl-2-benzothiazole sulfenamide.

7. The ultra-light foam cotton according to claim 3, characterized in that: The active agent is selected from one or more of stearic acid and fatty acids.

8. The method for preparing ultralight foam cotton according to claim 1, characterized in that: The steps include: Step 1, 5.2-6.5 parts of sulfur powder, a vulcanizing agent, 3.2-4.5 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 6-8 parts of a foaming agent, 10-12 parts of zinc oxide, 1-5 parts of a peroxide vulcanizer, and 10-20 parts of an activator are put into a mixing chamber, and the upper top bolt is not pressed down, and the mixture is stirred for a period of time, and then 80-100 parts of a mixed material B and 25-50 parts of EPDM rubber 3092 are put into the mixing chamber, and after the first pressurization for a period of time, the upper top bolt is raised and turned over; after the upper top bolt is pressed down again for a period of time, the upper top bolt is raised, and the upper top bolt is pressed down 6-8 times, and the upper top bolt is raised for kneading; during the kneading process, cooling water is continuously added to cool down, and the material is poured when the mixed material reaches 110° C. to obtain a mixed rubber; Step 2, putting the above-mentioned mixed rubber into an open mill, continuously passing cooling water through the rollers of the open mill, setting the parameters of the rollers, the thickness of the first rolling is 4 mm, the thickness of the second rolling is 1.5 mm, cooling and cooling after the second rolling, dividing, standing for 24 hours, to obtain a mixture, the temperature of the mixture is 40° C.-60° C.; Step 3, the mixture with a temperature of 40°C-60°C is put into the calender again, the rollers of the calender are continuously passed with cooling water, the rolling thickness parameter of the rollers is set to 0.8mm, the mixture is calendered with a thickness of 0.8mm, and left to cool for 24 hours to obtain a rubber compound with a material temperature below 30°C; Step 4, putting the above-mentioned mixed rubber into an open mill, controlling the temperature at 70° C.-75° C., and mixing the raw materials of each component further and preheating the temperature to obtain a preheated material; Step 5, putting the preheated material into an extruder for extrusion molding, cutting, and standing to cool for 24 hours to obtain a film, the film temperature of which is lower than 50° C.; Step 6: Put the above film into the vulcanizer, and the oil pressure parameter is 1500±30kg / cm 2 The temperature parameter in the mold is 120℃-135℃, the rubber is vulcanized for 60-80min, the temperature is lowered and the pressure is released to obtain a primary vulcanized foam material; Step 7: transfer the above-mentioned primary vulcanized foaming material into the foaming machine for further foaming, and set the oil pressure parameter to 50±5kg / cm 2 The temperature parameter in the mold is 150℃-165℃, the secondary foaming is carried out for 50-60min, the temperature is lowered and the pressure is released to obtain the secondary foaming material.

9. The use of the ultra-light foam cotton according to claim 1, comprising a foam product, characterized in that: The foamed product is made of the ultra-light foamed cotton material according to claim 1.

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