Tomaline pretreatment and polyurethane sponge integrated production process

Abstract

The invention provides a tourmaline pretreatment and polyurethane sponge integrated production process. The process comprises the following steps: firstly, cleaning and drying tourmaline particles, and ball-milling and crushing the tourmaline particles to 1-10 microns; carrying out surface modification on the powder by adopting a silane coupling agent ethanol solution; mixing and dispersing the modified powder and polyol, adding isocyanate, a foaming agent and a catalyst, and uniformly stirring; the mixture is injected into a mold for foaming, and finally curing and post-treatment are performed to obtain the tourmaline polyurethane sponge. The particle size of the tourmaline is successfully reduced to a micron level through a crushing process and a grinding aid, the particles under the scale can effectively exert the health function of the tourmaline, roughness and discomfort caused by direct use of original particles are thoroughly eliminated, meanwhile, the surface is modified, the particles are perfectly embedded in a sponge base body, and the service life of the tourmaline is prolonged. The final product is very soft and flat in touch, and the unevenness and friction feeling existing in the traditional product mixed with large particles are completely avoided.

Description

Technical Field

[0001] This invention relates to the field of sponge production technology, and in particular to an integrated production process of tourmaline stone pretreatment and polyurethane sponge. Background Technology

[0002] Tourmaline polyurethane foam is a composite material that combines natural mineral tourmaline with a polyurethane foam matrix. Existing production processes typically employ physical mixing, where untreated tourmaline particles are directly added to the polyurethane foaming system. The composite material is then prepared through conventional stirring, casting, and curing processes. While this method is simple to operate, the overall process is rather crude and lacks targeted pretreatment of the tourmaline raw material, resulting in discomfort for users.

[0003] Directly blended tourmaline stone particles have a large particle size and low surface activity, resulting in poor compatibility with the polyurethane matrix. They are also prone to sedimentation or agglomeration during foaming, causing uneven dispersion. In addition, unmodified tourmaline stone contains impurities on its surface and has strong hydrophilicity, which can hinder the polymerization reaction of polyurethane. This leads to uneven cell structure and large differences in density distribution inside the sponge, resulting in a rough feel and a noticeable grainy texture when used against the skin, resulting in poor comfort. Furthermore, traditional processes do not perform surface activation treatment on tourmaline stone, making it difficult for its functional components (such as negative ion release capacity) to be effectively utilized. Moreover, it is prone to falling off due to weak bonding during long-term use, thereby reducing the product's durability and health benefits.

[0004] Therefore, in response to the problems mentioned above, this invention proposes an integrated production process for tourmaline stone pretreatment and polyurethane foam. Summary of the Invention

[0005] To overcome the problems of poor dispersibility, low product comfort, and insufficient functional durability of tourmaline stone produced by existing processes, this invention proposes an integrated production process of tourmaline stone pretreatment and polyurethane foam. Through multi-stage crushing, surface modification, and mixing and foaming steps, a uniform and stable composite of tourmaline stone in the foam matrix is ​​achieved, which greatly improves the smoothness, comfort, and functionality of the product.

[0006] The technical solution of this invention is: an integrated production process for tourmaline stone pretreatment and polyurethane foam, comprising the following steps: S1. Place the tourmaline stone particles into the cleaning tank and use deionized water for ultrasonic cleaning. The ultrasonic frequency is 20-40kHz and the cleaning time is 10-30 minutes to remove surface impurities and dust. S2, after cleaning, the tourmaline granules are transferred to a drying oven and dried at 105-115℃ for 2-4 hours to reduce the moisture content to below 0.5%; S3. The dried tourmaline particles are fed into a ball mill at a speed of 200-300 rpm for 1-3 hours to achieve an average particle size of 1-10 μm. S4. The pulverized tourmaline powder is mixed with a silane coupling agent in an ethanol solution. The amount of silane coupling agent is 0.5-2% of the weight of the tourmaline powder, and the concentration of the ethanol solution is 50-70%. After mixing, the mixture is stirred and reacted at 60-80℃ for 1-2 hours. Then, it is filtered and dried to obtain surface-modified tourmaline powder. S5 provides the raw materials required for the production of polyurethane foam, including polyols, isocyanates, foaming agents, catalysts and water. The NCO index of polyols and isocyanates is controlled at 90-110. S6. Add the surface-modified tourmaline powder to the polyol and stir it for 10-20 minutes at 1000-2000 rpm using a high-speed disperser to make the tourmaline uniformly dispersed. Then add isocyanate, foaming agent, catalyst and water in sequence and continue stirring for 2-5 minutes to form a uniform mixture. S7. Pour the mixture into a preheated mold. The mold surface is coated with a release agent. The mixture foams in the mold for 5-10 minutes at a foaming pressure of 0.1-0.5 MPa to form a sponge. S8. Remove the foamed sponge from the mold and place it in a curing furnace. Cure it at 100-120℃ for 1-2 hours, and then cool it to room temperature to obtain tourmaline polyurethane sponge.

[0007] Preferably, after ultrasonic cleaning in step S1, the tourmaline particles are rinsed with deionized water 2-3 times and centrifuged at 2000-3000 rpm for 5-10 minutes. This combination of parameters can efficiently remove residual moisture from the surface and prevent the particles from breaking due to excessive centrifugation, thus saving energy for subsequent drying.

[0008] Preferably, during the ball milling process in step S3, a grinding aid is added. The grinding aid is stearic acid or polyvinyl alcohol, and the amount added is 0.1-0.5% of the weight of tourmaline, which is used to promote grinding and prevent agglomeration.

[0009] It is worth noting that stearic acid is preferred for scenarios where hydrophobic modification is required, while polyvinyl alcohol is suitable for situations where hydrophilicity is maintained. The optimal pulverization efficiency can be achieved when the addition amount is controlled at 0.3%, and excessive additives can be avoided from affecting the activity of tourmaline.

[0010] Preferably, the silane coupling agent in step S4 is γ-aminopropyltriethoxysilane or γ-methacryloyloxypropyltrimethoxysilane, and the drying conditions are drying at 60-80°C for 2-4 hours.

[0011] Preferably, γ-aminopropyltriethoxysilane is suitable for enhancing the interfacial bonding between tourmaline and the polyurethane matrix, while γ-methacryloyloxypropyltrimethoxysilane can improve the dispersion stability of the powder. Vacuum drying at 70°C for 3 hours can completely remove the solvent and avoid the decomposition of the coupling agent.

[0012] Preferably, the polyol in step S5 is a polyether polyol or a polyester polyol, the isocyanate is diphenylmethane diisocyanate or toluene diisocyanate, the foaming agent is water or a physical foaming agent, and the catalyst is an amine catalyst or a tin catalyst.

[0013] Preferably, when the foaming agent in step S5 is water, the amount used is 1-3% of the weight of the polyol; when the foaming agent is a physical foaming agent, dichloromethane or cyclopentane is selected, and the amount used is 5-15% of the weight of the polyol.

[0014] It is worth noting that water is an environmentally friendly and low-cost foaming agent, but its dosage must be strictly controlled to within 2% to prevent the foam cells from being too coarse. Cyclopentane is suitable for applications that require high thermal conductivity, and its dosage is preferably 10% to balance the foaming effect and physical properties.

[0015] Preferably, the tourmaline powder in step S6 is added to the polyol at a weight ratio of 1-10%.

[0016] Preferably, the preheated mold temperature in step S7 is 50-80℃.

[0017] Preferably, after the curing process in step S8, the process further includes cutting, polishing, and cleaning the surface of the sponge to remove residual impurities and adjust its size.

[0018] Preferably, the entire production process, from pretreatment to mixing, is carried out under inert gas protection. The inert gas is nitrogen or argon, and the oxygen concentration is controlled below 100 ppm to prevent oxidation of the tourmaline and maintain its healthy properties.

[0019] The beneficial effects of this invention are: 1. By using a crushing process and grinding aids, the particle size of tourmaline stone has been successfully reduced to the micron level. Particles at this size can effectively exert their health functions and completely eliminate the roughness and discomfort caused by using raw particles directly. At the same time, the surface is modified and perfectly embedded in the sponge matrix, resulting in an extremely soft and smooth feel to the touch of the final product. This completely avoids the unevenness and friction of traditional products with large mixed particles, greatly improving the comfort and close-fitting feel when in contact with the human body.

[0020] 2. This invention thoroughly removes impurities and dust adhering to the surface of tourmaline stone through a multi-stage ultrasonic cleaning and centrifugal dehydration process. This not only avoids the interference of impurities on the subsequent polyurethane reaction, but also improves the purity of the tourmaline stone powder, thereby ensuring the cleanliness and safety of the final product. Attached Figure Description

[0021] Figure 1 The diagram shown is a schematic representation of the preparation process of this invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but 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.

[0023] This invention provides an embodiment: an integrated production process for tourmaline stone pretreatment and polyurethane foam. The main raw materials in this embodiment include: tourmaline ore, which originates from Xinjiang, with an initial particle size of approximately 3-5 mm. Its main chemical components are SiO2 (65-72%), Al2O3 (12-15%), B2O3 (8-10%), and other trace elements, with a negative ion release value ≥800 ions / cc; polyether polyol is selected; diphenylmethane diisocyanate is used as the isocyanate; deionized water is used as the foaming agent; the catalyst is composed of bis(dimethylaminoethyl) ether and stannous octoate; γ-aminopropyltriethoxysilane is used as the surface modifier; other auxiliary materials include anhydrous ethanol, stearic acid used as a grinding aid, nitrogen with a purity of not less than 99.99%, and organosilicon release agent, etc.

[0024] Please see Figure 1 The present invention provides Embodiment 1: This embodiment uses the above-mentioned raw materials. Take 1 kg of tourmaline ore particles and place them in an ultrasonic cleaning tank. Add 5 L of deionized water, start the ultrasonic generator, set the frequency to 30 kHz, and the cleaning time to 20 minutes. After cleaning, drain the wastewater and rinse three times with fresh deionized water. Transfer the cleaned particles to a centrifuge and centrifuge at 2500 rpm for 8 minutes to remove water. This step can effectively remove the mud and impurities attached to the surface.

[0025] The dehydrated tourmaline granules were evenly spread in a drying tray and placed in a forced-air drying oven. The drying temperature was set to 110℃ and the drying time was 3 hours. After drying, a sample was taken to test the moisture content. The moisture content was measured to be 0.3% using a halogen moisture analyzer, which meets the requirements (<0.5%).

[0026] The dried tourmaline granules and stearic acid (added at 0.3% of the tourmaline weight) were placed in a grinding jar, the speed was set to 250 rpm, and the grinding time was 2 hours. After grinding, the particle size distribution of the powder was detected by a laser particle size analyzer. The results showed that D50 was 5.2 μm and D90 was 9.8 μm, which met the expected target.

[0027] Weigh 200g of pulverized tourmaline powder and place it in a 2L reactor. Prepare 600mL of 60% ethanol aqueous solution and add 3g of γ-aminopropyltriethoxysilane (1.5% of the powder weight). After stirring evenly, pour the solution into the reactor and stir and heat at 300rpm. Control the reaction temperature at 70℃ and continue the reaction for 1.5 hours. After the reaction is completed, perform vacuum filtration and transfer the filter cake to a vacuum drying oven. Dry the cake at 70℃ and -0.095MPa for 3 hours to obtain surface-modified tourmaline powder with good flowability.

[0028] Prepare polyurethane foam raw materials according to the formulation shown in Table 1. First, add 5% of the total weight of polyol with surface-modified tourmaline powder to polyether polyol. Use a high-speed disperser with a cooling jacket and stir at 1500 rpm for 15 minutes under the condition of circulating cooling water at 15℃ to make the powder uniformly dispersed and form a stable suspension slurry. Then, add water, bis(dimethylaminoethyl) ether catalyst and stannous octoate catalyst in sequence and continue stirring for 2 minutes. Finally, quickly add diphenylmethane diisocyanate and stir at high speed at 2000 rpm for 3 minutes to form a uniform mixture slurry. The mixing temperature is maintained at 25±2℃ throughout the process.

[0029] Table 1 Polyurethane Foaming Raw Materials

[0030] The mixed slurry is quickly poured into a preheated aluminum alloy mold at 60°C. The mold is then immediately closed. The slurry foams freely inside the mold and fills the cavity. The foaming time is about 7 minutes, and the pressure inside the mold is about 0.3 MPa. The mold temperature is maintained at 60°C. After 10 minutes, the mold is opened and the sponge is removed. The removed sponge is immediately transferred to a curing oven and cured at 110°C for 1.5 hours. After curing, the sponge is allowed to cool naturally to room temperature.

[0031] Place the cured sponge block on a cutting machine and cut it into the required size (e.g., 400mm×400mm×50mm pads). The cutting accuracy is controlled within ±0.5mm. Then, lightly sand the surface with 800-grit sandpaper to remove parting lines and burrs. Finally, use compressed air at a pressure of 0.6MPa to blow away the surface and use a vacuum cleaner to remove residual powder and debris to obtain the final tourmaline stone polyurethane health sponge product.

[0032] This invention provides Embodiment 2: This embodiment uses the above-mentioned raw materials. Take 1 kg of tourmaline ore particles and place them in an ultrasonic cleaning tank. Add 5 L of deionized water, start the ultrasonic generator, set the frequency to 30 kHz, and the cleaning time to 20 minutes. After cleaning, drain the wastewater and rinse three times with fresh deionized water. Transfer the cleaned particles to a centrifuge and centrifuge at 2500 rpm for 8 minutes to remove water. This step can effectively remove the mud and impurities attached to the surface.

[0033] The dehydrated tourmaline granules were evenly spread in a drying tray and placed in a forced-air drying oven. The drying temperature was set to 110℃ and the drying time was 3 hours. After drying, a sample was taken to test the moisture content. The moisture content was measured to be 0.3% using a halogen moisture analyzer, which meets the requirements (<0.5%).

[0034] The dried tourmaline granules and stearic acid (added at 0.3% of the tourmaline weight) were placed in a grinding jar, the speed was set to 250 rpm, and the grinding time was 2 hours. After grinding, the particle size distribution of the powder was detected by a laser particle size analyzer. The results showed that D50 was 5.2 μm and D90 was 9.8 μm, which met the expected target.

[0035] Weigh 200g of pulverized tourmaline powder and place it in a 2L reactor. Prepare 600mL of 60% ethanol aqueous solution and add 4g of γ-methacryloyloxypropyltrimethoxysilane (2.0% of the powder weight). After stirring evenly, pour the solution into the reactor and stir and heat at 300rpm. Control the reaction temperature at 70℃ and continue the reaction for 1.5 hours. After the reaction is completed, perform vacuum filtration and transfer the filter cake to a vacuum drying oven. Dry the cake at 70℃ and -0.095MPa for 3 hours to obtain surface-modified tourmaline powder with good flowability.

[0036] Prepare polyurethane foam raw materials according to the formulation shown in Table 2. First, add 10% of the total weight of polyol with surface-modified tourmaline powder to polyether polyol. Use a high-speed disperser with a cooling jacket and stir at 1500 rpm for 15 minutes under the condition of circulating cooling water at 15℃ to make the powder uniformly dispersed and form a stable suspension slurry. Then, add water, cyclopentane, bis(dimethylaminoethyl) ether catalyst and stannous octoate catalyst in sequence and continue stirring for 2 minutes. Finally, quickly add diphenylmethane diisocyanate and stir at high speed at 2000 rpm for 3 minutes to form a uniform slurry. The mixing temperature is maintained at 25±2℃ throughout the process.

[0037] Table 2 Polyurethane Foaming Raw Materials

[0038] The mixed slurry is quickly poured into a preheated aluminum alloy mold at 60°C. The mold is then immediately closed. The slurry foams freely within the mold and fills the cavity. The foaming time is approximately 7 minutes, and the pressure inside the mold is approximately 0.25 MPa. The mold temperature is maintained at 60°C. After 10 minutes, the mold is opened and the sponge is removed. The removed sponge is immediately transferred to a curing oven and cured at 100°C for 2.0 hours. After curing, the sponge is allowed to cool naturally to room temperature.

[0039] Place the cured sponge block on a cutting machine and cut it into the required size (e.g., 400mm×400mm×50mm pads). The cutting accuracy is controlled within ±0.5mm. Then, lightly sand the surface with 800-grit sandpaper to remove parting lines and burrs. Finally, use compressed air at a pressure of 0.6MPa to blow away the surface and use a vacuum cleaner to remove residual powder and debris to obtain the final tourmaline stone polyurethane health sponge product.

[0040] At room temperature, it can stably release far-infrared rays with a wavelength of 4-14 micrometers. This wavelength is similar to the far-infrared rays emitted by the human body itself and is known as "life light wave." It has strong penetrability and can be absorbed by human skin and subcutaneous tissue. After being absorbed, it is converted into gentle heat energy, which can help raise the local skin temperature, promote blood circulation and metabolism, and relieve stiffness and soreness caused by cold or poor circulation.

[0041] Comparative Example 1 provided by the present invention: This comparative example compares the tourmaline polyurethane foam products prepared in the two embodiments above with the control group. Control group 1 is a regular polyurethane foam without any tourmaline, and its formula is the same as the basic formula of embodiment 1 minus the tourmaline component. Control group 2 is a foam prepared by directly adding 5% of raw tourmaline particles without any pretreatment (i.e., without cleaning, crushing, or surface modification) on the basis of control group 1.

[0042] Referring to Table 3, it can be seen that the density and hardness of all samples with added tourmaline are on the same order of magnitude as those in control group 1, indicating that the addition of tourmaline did not negatively affect the basic physical structure of the sponge. The minor differences in parameters between Examples 1 and 2 mainly stem from adjustments to the amount of tourmaline added, the type of foaming agent, and its dosage.

[0043] The lowest tensile strength of control group 2 was 82 kPa, and the elongation at break decreased significantly by 155%. This indicates that the coarse, large-particle tourmaline stone has extremely poor compatibility with the polyurethane matrix, forming obvious stress concentration points in the matrix, which become structural defects in the material and severely weaken its mechanical properties. In contrast, the tensile strengths of Examples 1 and 2 are higher than those of control group 1 (ordinary sponge), with Example 1 reaching 110 kPa. This shows that the micron-sized tourmaline stone powder, after being finely pretreated by this invention, forms a strong interfacial bond with the polyurethane molecular chains through the bridging effect of the silane coupling agent, playing a positive reinforcing and filling role rather than a destructive role. The maintenance of the elongation at break also shows that the composite material has not lost its flexibility while obtaining higher strength.

[0044] The lowest rebound rate of control group 2 was 38%, and the highest compression set was 12.0%, indicating that it had high energy dissipation, was prone to plastic deformation, and was prone to collapse after a period of use. The performance of Examples 1 and 2 was very close to that of control group 1, indicating that the modified tourmaline powder was uniformly dispersed in the cell network and effectively participated in the construction of the elastic structure, ensuring the excellent rebound performance and fatigue resistance of the sponge, and indicating a longer service life.

[0045] Table 3 Results of Physical and Mechanical Performance Tests

[0046] Measure functionality: Referring to Table 4, it can be seen that control group 1 releases almost no negative ions, and although control group 2 releases 450 ions / cc, proving the efficacy of tourmaline stone, it is far from reaching its potential. In contrast, all embodiments of the present invention release more than 1800 ions / cc of negative ions.

[0047] The product in Comparison Group 2 had an extremely rough texture and a strong grainy feel. It caused a noticeable stinging sensation when used close to the skin, and a large number of particles would fall off when the surface was lightly patted. It could not meet the requirements for daily use at all. In contrast, the products in Examples 1 and 2 completely solved this problem. Their surface texture was no different from that of Comparison Group 1. They were soft, flat and smooth, and received high scores in subjective evaluation. More importantly, almost no particles were detected falling off.

[0048] Table 4 Functional and Comfort Results

[0049] The sample from Example 1 underwent 5000 consecutive compression fatigue tests to simulate long-term use. After the test, the negative ion release was measured again. The results showed that the release could still be maintained at more than 90% of the initial value (approximately 1665 ions / cc). This indicates that the present invention not only endows the sponge with powerful health functions, but also ensures the long-term effectiveness of these functions, avoiding rapid performance degradation caused by filler shedding, and meeting the high durability requirements of commercial products.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An integrated production process for tourmaline stone pretreatment and polyurethane foam, characterized in that, Includes the following steps: S1. Place the tourmaline stone particles into the cleaning tank and use deionized water for ultrasonic cleaning. The ultrasonic frequency is 20-40kHz and the cleaning time is 10-30 minutes to remove surface impurities and dust. S2, after cleaning, the tourmaline granules are transferred to a drying oven and dried at 105-115℃ for 2-4 hours to reduce the moisture content to below 0.5%; S3. The dried tourmaline particles are fed into a ball mill at a speed of 200-300 rpm for 1-3 hours to achieve an average particle size of 1-10 μm. S4. The pulverized tourmaline powder is mixed with a silane coupling agent in an ethanol solution. The amount of silane coupling agent is 0.5-2% of the weight of the tourmaline powder, and the concentration of the ethanol solution is 50-70%. After mixing, the mixture is stirred and reacted at 60-80℃ for 1-2 hours. Then, it is filtered and dried to obtain surface-modified tourmaline powder. S5 provides the raw materials required for the production of polyurethane foam, including polyols, isocyanates, foaming agents, catalysts and water. The NCO index of polyols and isocyanates is controlled at 90-110. S6. Add the surface-modified tourmaline powder to the polyol and stir it for 10-20 minutes at 1000-2000 rpm using a high-speed disperser to make the tourmaline uniformly dispersed. Then add isocyanate, foaming agent, catalyst and water in sequence and continue stirring for 2-5 minutes to form a uniform mixture. S7. Pour the mixture into a preheated mold. The mold surface is coated with a release agent. The mixture foams in the mold for 5-10 minutes at a foaming pressure of 0.1-0.5 MPa to form a sponge. S8. Remove the foamed sponge from the mold and place it in a curing furnace. Cure it at 100-120℃ for 1-2 hours, and then cool it to room temperature to obtain tourmaline polyurethane sponge.

2. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: After ultrasonic cleaning in step S1, the tourmaline particles are rinsed with deionized water 2-3 times and centrifuged at 2000-3000 rpm for 5-10 minutes to remove water.

3. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: In step S3, when the ball mill is used for pulverizing, a grinding aid is added. The grinding aid is stearic acid or polyvinyl alcohol, and the amount added is 0.1-0.5% of the weight of tourmaline.

4. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: The silane coupling agent in step S4 is γ-aminopropyltriethoxysilane or γ-methacryloyloxypropyltrimethoxysilane, and the drying conditions are drying at 60-80°C for 2-4 hours.

5. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: In step S5, the polyol is a polyether polyol or a polyester polyol, the isocyanate is diphenylmethane diisocyanate or toluene diisocyanate, the foaming agent is water or a physical foaming agent, and the catalyst is an amine catalyst or a tin catalyst.

6. The integrated production process of tourmaline stone pretreatment and polyurethane sponge according to claim 5, characterized in that: When the foaming agent in step S5 is water, the amount used is 1-3% of the weight of the polyol. When the foaming agent is a physical foaming agent, dichloromethane or cyclopentane is selected, and the amount used is 5-15% of the weight of the polyol.

7. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: In step S6, the tourmaline powder is added to the polyol at a weight ratio of 1-10%.

8. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: The preheated mold temperature in step S7 is 50-80℃.

9. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: After the curing process in step S8, the process also includes cutting, polishing, and cleaning the surface of the sponge to remove residual impurities and adjust its size.

10. The integrated production process of tourmaline stone pretreatment and polyurethane foam according to claim 1, characterized in that: Throughout the entire production process, tourmaline stone is processed and mixed under inert gas protection, with nitrogen or argon as the inert gas and the oxygen concentration controlled below 100 ppm to prevent oxidation and maintain its healthy properties.

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