Uniformly foamed yoga mat and preparation method thereof

Abstract

The invention relates to the technical field of yoga mat production, in particular to a uniformly foamed yoga mat and a preparation method thereof, polyvinyl chloride resin is used as a main component, and polyformaldehyde resin and polymethyl methacrylate resin are added as reinforcing components; the wear resistance, the elasticity, the heat resistance, the cold resistance and the corrosion resistance of the traditional PVC yoga mat can be improved; moreover, aiming at the mixed raw material of the polyvinyl chloride resin, the polyformaldehyde resin and the polymethyl methacrylate resin, three foaming agents with different decomposition temperatures, namely toluenesulfonyl hydrazide, di (benzenesulfonyl hydrazide) ether and p-toluenesulfonyl semicarbazide, are added, and three stages are set in the foaming stage, so that the foaming performance of the polyvinyl chloride resin, the polyformaldehyde resin and the polymethyl methacrylate resin is improved. Different foaming temperatures and foaming time are controlled in each stage, so that the mixed raw materials can be foamed more sufficiently, the foaming of the foaming materials is ensured to be more uniform, and the quality of the yoga mat is improved.

Description

Technical Field

[0001] The invention relates to the technical field of yoga mat production, and in particular to a uniformly foamed yoga mat and a preparation method thereof. Background Art

[0002] With the development of economy and the improvement of people's living standards, yoga has become one of the fashionable sports in today's society. Long-term yoga practice can prevent diseases, effectively regulate the nervous system and endocrine system, and improve human health. When doing yoga, you should use a yoga mat, which can effectively reduce the pain of contact between the human body and the ground. In addition to being soft and having good resilience, the yoga mat should also have good anti-slip performance, toughness and mechanical properties. At present, most yoga mats are made of PVC materials, which are mainly mixed with PVC, plasticizers, foaming agents and fillers such as calcium carbonate, and then foamed and molded.

[0003] However, PVC materials are brittle and have poor mechanical properties, especially poor anti-slip and resilience. The existing yoga mat product formula usually adds other resins for cross-linking and compounding, such as adding polypropylene resin, polyoxymethylene resin and other resins to improve its brittleness. During the foaming production process, the other resins added have poor compatibility due to the large difference in chemical properties between other resins and PVC. In addition, it is difficult to ensure the foaming effect of a single foaming agent for compound plastics, resulting in uneven distribution of the size, position and number of bubbles during the plastic foaming process, resulting in poor quality of the yoga mat, and in severe cases, it is even unusable. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a uniformly foamed yoga mat and a preparation method thereof to solve the above-mentioned problems.

[0005] A uniformly foamed yoga mat, comprising the following components in parts by weight:

[0006] 50-70 parts of polyvinyl chloride resin, 15-20 parts of polyoxymethylene resin, 5-10 parts of polymethyl methacrylate resin, 1-5 parts of cross-linking agent, 1-3 parts of foaming component, 1-4 parts of lubricating component, 1-2 parts of antibacterial agent;

[0007] The English abbreviation of polyvinyl chloride resin is PVC, with a specific gravity of 1.38 g / cm3, a molding shrinkage rate of 0.6-1.5%, and a molding temperature of 160-190°C. PVC resin is brittle and has poor mechanical properties, especially poor anti-slip and resilience. Yoga mats made of PVC resin alone have insufficient anti-slip and resilience.

[0008] To this end, the present application is compounded by adding polyformaldehyde resin and polymethyl methacrylate resin, wherein the English abbreviation of polyformaldehyde resin is POM, the specific gravity is 1.41-1.43 g / cubic centimeter, the molding shrinkage rate is 1.2-3.0%; the molding temperature is 170-200°C; POM resin has good comprehensive performance, high strength and stiffness, good wear resistance, low water absorption, and good dimensional stability. Adding POM resin to the formula can improve the wear resistance and elasticity of the PVC yoga mat; the English abbreviation of polymethyl methacrylate resin is PMMA, the specific gravity is 1.18 g / cubic centimeter, the molding shrinkage rate is 0.5-0.7%, and the molding temperature is 160-230°C; PMMA resin has excellent transparency, high strength, certain heat and cold resistance, corrosion resistance, and good insulation; adding PMMA resin to the formula can improve the heat and cold resistance and corrosion resistance of the PVC yoga mat.

[0009] Furthermore, the foaming component of the present application is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide in a mass ratio of (10-15):(3-5):1.

[0010] When p-Toluenesulfonylhydrazide is heated to above 105℃, it gradually decomposes from the molten state and releases nitrogen. The standard gas emission is 120ml / g. It hydrolyzes in hot water to produce sulfonic acid and decomposes nitrogen. It has no hygroscopic deliquescence phenomenon at room temperature and has relatively stable chemical properties.

[0011] The decomposition temperature of di(benzenesulfonylhydrazide)ether in the resin is 120-140°C. After decomposition, nitrogen and water vapor are released, and the standard gas emission is 120ml / g.

[0012] The decomposition temperature of p-toluenesulfonyl semicarbazide in the resin is 200-220°C, and nitrogen and carbon dioxide are released after decomposition;

[0013] The present application sets three foaming agents with different decomposition temperatures, and cooperates with the three-stage foaming of the subsequent foaming machine. In the first foaming stage (100-110°C), p-toluenesulfonyl hydrazide starts to foam the molten polyvinyl chloride resin. Since other components have not reached the predetermined melting temperature, the foaming is hindered under the pressure of other components, thereby forming a large number of small-aperture bubble holes (aperture of about 0.1-0.3 mm); then enters the second foaming stage (150-170°C), di(benzenesulfonyl hydrazide) ether starts to foam the molten polyvinyl chloride resin and polyoxymethylene resin, and since polymethyl methacrylate resin Before the resin reaches the predetermined melting temperature, its foaming is hindered under the pressure of the polymethyl methacrylate resin and other components, but the resistance is small, so a large number of medium-sized bubble holes (pore diameter is about 0.5-0.7mm) are formed; finally, it enters the third foaming stage (190-210°C), the polymethyl methacrylate resin melts, and the toluenesulfonylamino urea begins to foam. Under the combination of other foaming agents, the foaming amount is greater, and the bubble holes formed are larger (pore diameter is about 1-2mm); through such synergistic effect, the pore size distribution of the prepared yoga mat is more uniform, and the resilience is better.

[0014] Specifically, the yoga mat is made of the following components in parts by weight:

[0015] 60-65 parts of polyvinyl chloride resin, 15-18 parts of polyoxymethylene resin, 5-7 parts of polymethyl methacrylate resin, 3-5 parts of cross-linking agent, 1-2 parts of foaming component, 1-3 parts of lubricating component, and 1.5 parts of antibacterial agent;

[0016] The foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether and p-toluenesulfonyl semicarbazide in a mass ratio of (10-12):(3-4):1.

[0017] Specifically, the yoga mat is made of the following components in parts by weight:

[0018] 65 parts of polyvinyl chloride resin, 15 parts of polyoxymethylene resin, 5 parts of polymethyl methacrylate resin, 4 parts of cross-linking agent, 2 parts of foaming component, 2 parts of lubricating component, 1.5 parts of antibacterial agent;

[0019] The foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether and p-toluenesulfonyl semicarbazide in a mass ratio of 10:3:1.

[0020] Specifically, the lubricant is selected from at least two of stearic acid, microcrystalline wax, polyethylene wax, and low molecular weight polypropylene. By adding the lubricant, under the action of the lubricant, the mixed material has better fluidity and stronger lubricity, thereby achieving a more uniform foaming effect.

[0021] Specifically, the antibacterial agent is composed of an inorganic antibacterial agent and a natural antibacterial agent in a weight ratio of (30-50): 1. The inorganic antibacterial agent and the natural antibacterial agent are compounded to have an antibacterial effect on a variety of bacteria, thereby improving the antibacterial effect of the yoga mat.

[0022] Specifically, the inorganic antibacterial agent is selected from at least one of zinc oxide powder, titanium dioxide powder, zirconium phosphate, calcium phosphate, and activated carbon fiber.

[0023] Specifically, the natural antibacterial agent is tea polyphenols.

[0024] Specifically, the crosslinking agent is selected from at least one of divinylbenzene, diisocyanate, and N,N-methylenebisacrylamide.

[0025] A method for preparing a yoga mat comprises the following steps:

[0026] S1 Internal Mixing: Mix polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, crosslinking agent, foaming component, lubricating component and antibacterial agent according to the proportion, mix them evenly and add them into the internal mixer for mixing;

[0027] S2: adding the material obtained in step S1 into an open mill, and then adding the foaming component for open refining;

[0028] S3 slicing: adding the material obtained in step S2 into a slicer for slicing;

[0029] S4 foaming: sending the sheet obtained in step S3 into a foaming machine for three-stage foaming, wherein the foaming temperature in the first stage is set at 100-110°C and the foaming time is 20-30min; the foaming temperature in the second stage is set at 150-170°C and the foaming time is 10-15min; the foaming temperature in the third stage is set at 190-210°C and the foaming time is 5-8min; and a foamed material is obtained;

[0030] S5 Cutting: Cut the foamed material to obtain a yoga mat.

[0031] Specifically, the internal mixing temperature of the internal mixer is 130-150° C., and the internal mixing time is 30-50 min; the open mixing temperature of the open mixing mill is 60-70° C., and the open mixing time is 20-30 min.

[0032] Beneficial effects of the present invention:

[0033] The present invention discloses a uniformly foamed yoga mat and a preparation method thereof. The polyvinyl chloride resin is used as a main component, and polyoxymethylene resin and polymethyl methacrylate resin are added as reinforcing components. The polyoxymethylene resin has good wear resistance and elasticity, and can improve the wear resistance and elasticity of a traditional PVC yoga mat. The polymethyl methacrylate resin has good heat resistance, cold resistance and corrosion resistance, and can improve the heat resistance, cold resistance and corrosion resistance of a traditional PVC yoga mat.

[0034] Moreover, for the mixed raw materials of polyvinyl chloride resin, polyoxymethylene resin and polymethyl methacrylate resin, by adding three foaming agents with different decomposition temperatures, namely toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether and p-toluenesulfonylamino urea, and setting three stages in the foaming stage, each stage controls a different foaming temperature and foaming time, the mixed raw materials can be foamed more fully, ensuring that the foaming of the foam material is more uniform, and improving the quality of the yoga mat. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic cross-sectional structure diagram of a yoga mat according to Embodiment 1;

[0036] The accompanying drawing is marked as: yoga mat 10. DETAILED DESCRIPTION

[0037] The present invention provides a uniformly foamed yoga mat and a preparation method thereof. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Example 1

[0039] This embodiment discloses a uniformly foamed yoga mat comprising the following components in parts by weight:

[0040] 65 parts of polyvinyl chloride resin, 15 parts of polyoxymethylene resin, 5 parts of polymethyl methacrylate resin, 4 parts of divinylbenzene, 2 parts of foaming component, 1 part of stearic acid, 1 part of microcrystalline wax, and 1.5 parts of antibacterial agent; wherein the foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide in a mass ratio of 10:3:1; the antibacterial agent is composed of zinc oxide powder and tea polyphenols in a weight ratio of (30-50):1.

[0041] This embodiment also discloses a method for preparing a yoga mat, comprising the following steps:

[0042] S0 material preparation: according to the above ratio, weigh polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline paraffin, p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, p-toluenesulfonyl semicarbazide, zinc oxide powder, and tea polyphenols for later use;

[0043] S1 internal mixing: polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline wax, zinc oxide powder and tea polyphenols are uniformly mixed and added into an internal mixer for mixing. The internal mixing temperature of the internal mixer is 130-150°C and the mixing time is 30-50min.

[0044] S2: adding the material obtained in step S1 to an open mill, and then adding p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide for open refining, the refining temperature of the open mill is 60-70° C., and the refining time is 20-30 min;

[0045] S3 slicing: adding the material obtained in step S2 into a slicer for slicing;

[0046] S4 foaming: sending the sheet obtained in step S3 into a foaming machine for three-stage foaming, wherein the foaming temperature in the first stage is set at 100-110°C and the foaming time is 20-30min; the foaming temperature in the second stage is set at 150-170°C and the foaming time is 10-15min; the foaming temperature in the third stage is set at 190-210°C and the foaming time is 5-8min; and a foamed material is obtained;

[0047] S5 cutting: Cut the foamed material to obtain Figure 1 The yoga mat 10 shown;

[0048] S6 test, performing a performance test on the yoga mat obtained in step S3, and the test results are recorded in the following Table 1.

[0049] Example 2

[0050] This embodiment discloses a uniformly foamed yoga mat comprising the following components in parts by weight:

[0051] 60 parts of polyvinyl chloride resin, 20 parts of polyoxymethylene resin, 5 parts of polymethyl methacrylate resin, 4 parts of divinylbenzene, 2 parts of foaming component, 1 part of stearic acid, 1 part of microcrystalline wax, and 1.5 parts of antibacterial agent; wherein the foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide in a mass ratio of 10:3:1; the antibacterial agent is composed of zinc oxide powder and tea polyphenols in a weight ratio of (30-50):1.

[0052] This embodiment also discloses a method for preparing a yoga mat, comprising the following steps:

[0053] S0 material preparation: according to the above ratio, weigh polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline paraffin, p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, p-toluenesulfonyl semicarbazide, zinc oxide powder, and tea polyphenols for later use;

[0054] S1 internal mixing: polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline wax, zinc oxide powder and tea polyphenols are uniformly mixed and added into an internal mixer for mixing. The internal mixing temperature of the internal mixer is 130-150°C and the mixing time is 30-50min.

[0055] S2: adding the material obtained in step S1 to an open mill, and then adding p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide for open refining, the refining temperature of the open mill is 60-70° C., and the refining time is 20-30 min;

[0056] S3 slicing: adding the material obtained in step S2 into a slicer for slicing;

[0057] S4 foaming: sending the sheet obtained in step S3 into a foaming machine for three-stage foaming, wherein the foaming temperature in the first stage is set at 100-110°C and the foaming time is 20-30min; the foaming temperature in the second stage is set at 150-170°C and the foaming time is 10-15min; the foaming temperature in the third stage is set at 190-210°C and the foaming time is 5-8min; and a foamed material is obtained;

[0058] S5 cutting: cutting the foamed material to obtain a yoga mat;

[0059] S6 test, performing a performance test on the yoga mat obtained in step S3, and the test results are recorded in the following Table 1.

[0060] Example 3

[0061] This embodiment discloses a uniformly foamed yoga mat comprising the following components in parts by weight:

[0062] 60 parts of polyvinyl chloride resin, 15 parts of polyoxymethylene resin, 10 parts of polymethyl methacrylate resin, 4 parts of divinylbenzene, 2 parts of foaming component, 1 part of stearic acid, 1 part of microcrystalline wax, and 1.5 parts of antibacterial agent; wherein the foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide in a mass ratio of 10:3:1; the antibacterial agent is composed of zinc oxide powder and tea polyphenols in a weight ratio of (30-50):1.

[0063] This embodiment also discloses a method for preparing a yoga mat, comprising the following steps:

[0064] S0 material preparation: according to the above ratio, weigh polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline paraffin, p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, p-toluenesulfonyl semicarbazide, zinc oxide powder, and tea polyphenols for later use;

[0065] S1 internal mixing: polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline wax, zinc oxide powder and tea polyphenols are uniformly mixed and added into an internal mixer for mixing. The internal mixing temperature of the internal mixer is 130-150°C and the mixing time is 30-50min.

[0066] S2: adding the material obtained in step S1 to an open mill, and then adding p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether, and p-toluenesulfonyl semicarbazide for open refining, the refining temperature of the open mill is 60-70° C., and the refining time is 20-30 min;

[0067] S3 slicing: adding the material obtained in step S2 into a slicer for slicing;

[0068] S4 foaming: sending the sheet obtained in step S3 into a foaming machine for three-stage foaming, wherein the foaming temperature in the first stage is set at 100-110°C and the foaming time is 20-30min; the foaming temperature in the second stage is set at 150-170°C and the foaming time is 10-15min; the foaming temperature in the third stage is set at 190-210°C and the foaming time is 5-8min; and a foamed material is obtained;

[0069] S5 cutting: cutting the foamed material to obtain a yoga mat;

[0070] S6 test, performing a performance test on the yoga mat obtained in step S3, and the test results are recorded in the following Table 1.

[0071] Comparative Example 1

[0072] Comparative Example 1 discloses a uniformly foamed yoga mat comprising the following components in parts by weight:

[0073] 65 parts of polyvinyl chloride resin, 15 parts of polyoxymethylene resin, 5 parts of polymethyl methacrylate resin, 4 parts of divinylbenzene, 2 parts of p-toluenesulfonyl hydrazide, 1 part of stearic acid, 1 part of microcrystalline wax, and 1.5 parts of antibacterial agent; wherein the antibacterial agent is composed of zinc oxide powder and tea polyphenols in a weight ratio of (30-50):1.

[0074] This embodiment also discloses a method for preparing a yoga mat, comprising the following steps:

[0075] S0 material preparation: according to the above ratio, weigh polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline paraffin, p-toluenesulfonyl hydrazide, zinc oxide powder, and tea polyphenols for later use;

[0076] S1 internal mixing: polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, divinylbenzene, stearic acid, microcrystalline wax, zinc oxide powder and tea polyphenols are uniformly mixed and added into an internal mixer for mixing. The internal mixing temperature of the internal mixer is 130-150°C and the mixing time is 30-50min.

[0077] S2: adding the material obtained in step S1 to an open mill, and then adding p-toluenesulfonyl hydrazide for open milling, the open milling temperature is 60-70° C., and the open milling time is 20-30 min;

[0078] S3 slicing: adding the material obtained in step S2 into a slicer for slicing;

[0079] S4 foaming: sending the sheet obtained in step S3 into a foaming machine for foaming at a foaming temperature of 100-110° C. for a foaming time of 50 min to obtain a foamed material;

[0080] S5 cutting: cutting the foamed material to obtain a yoga mat;

[0081] S6 test, performing a performance test on the yoga mat obtained in step S3, and the test results are recorded in the following Table 1.

[0082] Comparative Example 2

[0083] Comparative Example 2 discloses a uniformly foamed yoga mat comprising the following components in parts by weight:

[0084] 85 parts of polyvinyl chloride resin, 2 parts of p-toluenesulfonyl hydrazide, 1 part of stearic acid, 1 part of microcrystalline wax, and 1.5 parts of antibacterial agent; wherein the antibacterial agent is composed of zinc oxide powder and tea polyphenols in a weight ratio of (30-50):1.

[0085] This embodiment also discloses a method for preparing a yoga mat, comprising the following steps:

[0086] S0 Preparation: Weigh polyvinyl chloride resin, stearic acid, microcrystalline paraffin, p-toluenesulfonyl hydrazide, zinc oxide powder, and tea polyphenols according to the above ratio for later use;

[0087] S1 internal mixing: polyvinyl chloride resin stearic acid, microcrystalline wax, zinc oxide powder and tea polyphenols are mixed evenly and added into an internal mixer for mixing. The internal mixing temperature of the internal mixer is 130-150°C and the mixing time is 30-50min.

[0088] S2: adding the material obtained in step S1 to an open mill, and then adding p-toluenesulfonyl hydrazide for open milling, the open milling temperature is 60-70° C., and the open milling time is 20-30 min;

[0089] S3 slicing: adding the material obtained in step S2 into a slicer for slicing;

[0090] S4 foaming: sending the sheet obtained in step S3 into a foaming machine for foaming at a foaming temperature of 100-110° C. for a foaming time of 50 min to obtain a foamed material;

[0091] S5 cutting: cutting the foamed material to obtain a yoga mat;

[0092] S6 test, performing a performance test on the yoga mat obtained in step S3, and the test results are recorded in the following Table 1.

[0093] Table 1:

[0094]

[0095] Referring to the test results in Table 1 above, compared with Comparative Examples 1 to 2, the tensile strength and C-type tear strength of Examples 1 to 3 did not decrease significantly; compared with Comparative Example 1, Examples 1 to 3 used three foaming agents with different decomposition temperatures, and the foaming stage was set in three stages, the pore size distribution was wider, and the pore size uniformity was better; compared with Comparative Example 2, Examples 1 to 3 used polyvinyl chloride resin as the main component, and added polyoxymethylene resin and polymethyl methacrylate resin as reinforcing components, while Comparative Example 2 only used polyvinyl chloride resin as the main component, and the friction coefficient and resilience were improved.

[0096] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A uniformly foamed yoga mat, characterized in that: The yoga mat comprises the following components in parts by weight: 50-70 parts of polyvinyl chloride resin, 15-20 parts of polyoxymethylene resin, 5-10 parts of polymethyl methacrylate resin, 1-5 parts of cross-linking agent, 1-3 parts of foaming component, 1-4 parts of lubricating component, 1-2 parts of antibacterial agent; The foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether and p-toluenesulfonyl semicarbazide in a mass ratio of (10-15):(3-5):

1.

2. A uniformly foamed yoga mat according to claim 1, characterized in that: The yoga mat comprises the following components in parts by weight: 60-65 parts of polyvinyl chloride resin, 15-18 parts of polyoxymethylene resin, 5-7 parts of polymethyl methacrylate resin, 3-5 parts of cross-linking agent, 1-2 parts of foaming component, 1-3 parts of lubricating component, and 1.5 parts of antibacterial agent; The foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether and p-toluenesulfonyl semicarbazide in a mass ratio of (10-12):(3-4):

1.

3. A uniformly foamed yoga mat according to claim 2, characterized in that: The yoga mat comprises the following components in parts by weight: 65 parts of polyvinyl chloride resin, 15 parts of polyoxymethylene resin, 5 parts of polymethyl methacrylate resin, 4 parts of cross-linking agent, 2 parts of foaming component, 2 parts of lubricating component, 1.5 parts of antibacterial agent; The foaming component is composed of p-toluenesulfonyl hydrazide, di(benzenesulfonyl hydrazide) ether and p-toluenesulfonyl semicarbazide in a mass ratio of 10:3:

1.

4. The uniformly foamed yoga mat according to claim 1, characterized in that: The lubricant is selected from at least two of stearic acid, microcrystalline wax, polyethylene wax, and low molecular weight polypropylene.

5. The uniformly foamed yoga mat according to claim 1, characterized in that: The antibacterial agent is composed of an inorganic antibacterial agent and a natural antibacterial agent in a weight ratio of (30-50):

1.

6. A uniformly foamed yoga mat according to claim 6, characterized in that: The inorganic antibacterial agent is selected from at least one of zinc oxide powder, titanium dioxide powder, zirconium phosphate, calcium phosphate and activated carbon fiber.

7. A uniformly foamed yoga mat according to claim 6, characterized in that: The natural antibacterial agent is tea polyphenols.

8. The uniformly foamed yoga mat according to claim 6, characterized in that: The crosslinking agent is selected from at least one of divinylbenzene, diisocyanate, and N,N-methylenebisacrylamide.

9. A method for preparing a yoga mat as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1 Internal Mixing: Mix polyvinyl chloride resin, polyoxymethylene resin, polymethyl methacrylate resin, crosslinking agent, foaming component, lubricating component and antibacterial agent according to the proportion, mix them evenly and add them into the internal mixer for mixing; S2: adding the material obtained in step S1 into an open mill, and then adding the foaming component for open refining; S3 slicing: adding the material obtained in step S2 into a slicer for slicing; S4 foaming: sending the sheet obtained in step S3 into a foaming machine for three-stage foaming, wherein the foaming temperature in the first stage is set at 100-110°C and the foaming time is 20-30min; the foaming temperature in the second stage is set at 150-170°C and the foaming time is 10-15min; the foaming temperature in the third stage is set at 190-210°C and the foaming time is 5-8min; and a foamed material is obtained; S5 Cutting: Cut the foamed material to obtain a yoga mat.

10. The method for preparing a yoga mat according to claim 9, characterized in that: The internal mixing temperature of the internal mixer is 130-150° C., and the internal mixing time is 30-50 min; the open mixing temperature of the open mixing mill is 60-70° C., and the open mixing time is 20-30 min.

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