Manufacturing method of environment-friendly yoga mat

Abstract

The invention relates to a manufacturing method of an environment-friendly yoga mat. The formula of the yoga mat comprises the following components in parts by weight: 20-22 parts of an EVA material, 3-5 parts of a PE material, 5-7 parts of a TPE material, 15-17 parts of an RPE material, 29-31 parts of barium sulfate, 1-3 parts of a foaming agent, 0.2-0.4 part of zinc oxide, 1-1.5 parts of a cross-linking agent and 3-5 parts of color master batches, the manufacturing method of the environment-friendly yoga mat comprises the following steps of internal mixing, open mixing, sheet discharging, stacking, cutting into blocks, cloth paving, secondary cutting, semi-finished product obtaining and finished product obtaining. The invention has the advantages that the product is convenient to manufacture and good in elasticity, and the hot melt glue which is pollution-free to the environment is adopted for lamination, so that the product is environment-friendly and safe. The manufacturing process is stable, manufacturing is simpler and more convenient, the production cost is low, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of yoga mat production, and particularly to a method for producing an environmentally friendly yoga mat. Background Art

[0002] There is a Chinese invention patent with the application number CN201410845013.9 and the name "An Environmentally Friendly and Odorless Yoga Mat and Its Preparation Process", which discloses a structure. The structure is made of the following raw materials in parts by weight: 70 - 80 parts of TPE elastomer granules, 20 - 30 parts of TA - 800 talcum powder, 1 - 10 parts of AC - 1000 foaming agent, 1 - 5 parts of odorless DCP (dicumyl peroxide), 0.1 - 0.5 parts of ZnO (zinc oxide), 01 - 0.5 parts of ST (zinc stearate), 1 part of R - 103 titanium dioxide, 0.1 - 0.5 parts of modifier, and 1 part of color masterbatch. The invention also discloses a preparation process for an environmentally friendly and odorless yoga mat. The product of the invention has a simple structure, does not use benzene - containing glue for lamination, is odorless and environmentally friendly, and the scraps during production and retired yoga mats are more conducive to recycling, meeting the general trend of energy conservation and environmental protection. The preparation process is simple and easy to implement, can effectively improve production efficiency and reduce production costs. However, its disadvantage is that the formula is not yet reasonable enough, and the elastic effect of the yoga mat is relatively poor. Therefore, its formula and production method still need to be improved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an environmentally friendly yoga mat that is convenient to manufacture and has good elasticity in view of the above - mentioned prior art status.

[0004] The technical solution adopted by the present invention to solve the above - mentioned technical problem is as follows: A method for producing an environmentally friendly yoga mat, characterized in that: the formula composition of this yoga mat is as follows: 20 - 22 parts by weight of EVA material, 3 - 5 parts by weight of PE material, 5 - 7 parts by weight of TPE material, 15 - 17 parts by weight of RPE material, 29 - 31 parts by weight of barium sulfate, 1 - 3 parts by weight of foaming agent, 0.2 - 0.4 parts by weight of zinc oxide, 1 - 1.5 parts by weight of cross - linker, 3 - 5 parts by weight of color masterbatch. The RPE refers to recycled polystyrene. The method for producing the environmentally friendly yoga mat comprises the following steps:

[0005] I. Kneading: Mix the raw materials according to any one of the formulas in Claims 1 to 4 and put them into a kneader at a temperature of 122 - 128 °C for kneading for 10 - 15 minutes;

[0006] II. Open - mill mixing: Put the kneaded mixture into an open - mill mixer at a temperature of 60 - 65 °C for open - mill mixing for 5 - 7 minutes;

[0007] III. Sheet extrusion: Extrude the open - milled mixture in a sheet extruder into a thin sheet layer of a set specification;

[0008] IV. Sprinkle white granular materials that can fuse with the thin sheet layer on the upper surface of the thin sheet layer, then cover it with another thin sheet layer, and repeat the above operation N times to form a multi-layer body with a set thickness. Place the multi-layer body in a mold and press it into an integral block in the mold; N is a natural number greater than or equal to 1.

[0009] V. Cutting into blocks: After demolding, cut the integral block into block-shaped bodies with set specifications on a cutting machine.

[0010] VI. Laying cloth: Arrange two block-shaped bodies of the same color and specification butt-jointed front and back and heat-fuse them together to form a connected block. Apply hot melt adhesive to both the upper and lower surfaces of the non-woven fabric that matches the connected block. Then, cover the connected block with the non-woven fabric coated with hot melt adhesive so that the lower surface of the non-woven fabric is bonded to the connected block as a whole.

[0011] VII. Cutting again: Cut the connected block covered with non-woven fabric into block-shaped bodies of the original size with non-woven fabric covering the upper surface at the joints of the block-shaped bodies.

[0012] VIII. Semi-finished product: Stack the block-shaped body without non-woven fabric and the block-shaped body covered with non-woven fabric that match each other up and down, and place them in a mold melted at 80 - 90 °C in the way that the non-woven fabric is sandwiched in the middle. After heat-fusing and bonding for 19 - 21 seconds, take out the sheet to form a semi-finished product.

[0013] IX. Finished product: Cut the semi-finished product into a yoga mat with a set shape on a cutting machine, and thus complete the production process.

[0014] As an improvement, the spreading density of the white granular materials in step IV can be randomly controlled, that is, cover the surface of the thin sheet with a set amount of white granular materials.

[0015] Further improvement, the particle size of the white granular materials is preferably 5 - 6 mm.

[0016] As an improvement, the white granular materials can be selected as white granular materials after the color masterbatch is foamed, or white granular materials made from 5 - 7 parts by weight of EVA material, PE material, TPE material, 3 - 5 parts by weight of RPE material, barium sulfate, foaming agent, cross-linking agent, and color masterbatch through kneading, open rolling, then sheet extrusion and pulverization.

[0017] Further improvement, in the pressing in step IV, the mold temperature can be selected as 165 - 170 °C, and the pressing time is preferably 30 - 45 minutes.

[0018] As a further improvement, the formulation of the yoga mat is as follows: 21 parts by weight of EVA material, 4 parts by weight of PE material, 6 parts by weight of TPE material, 16 parts by weight of RPE material, 30 parts by weight of barium sulfate, 2 parts by weight of foaming agent, 0.3 parts by weight of zinc oxide, 1.3 parts by weight of crosslinking agent, 4 parts by weight of masterbatch. The RPE refers to recycled polystyrene.

[0019] As an improvement, the foaming agent can preferably be azodicarbonamide.

[0020] As an improvement, the crosslinking agent can preferably be dicumyl peroxide.

[0021] Another technical solution adopted by the present invention to solve the above technical problems is as follows: The formulation of this yoga mat is as follows: 20 - 22 parts by weight of EVA material, 3 - 5 parts by weight of PE material, 5 - 7 parts by weight of TPE material, 15 - 17 parts by weight of RPE material, 29 - 31 parts by weight of barium sulfate, 1 - 3 parts by weight of foaming agent, 0.2 - 0.4 parts by weight of zinc oxide, 1 - 1.5 parts by weight of crosslinking agent, 3 - 5 parts by weight of masterbatch. The RPE refers to recycled polystyrene; The manufacturing method of the eco-friendly yoga mat consists of the following steps:

[0022] I. Internal mixing: Mix the raw materials according to any one of the formulations in Claims 1 to 4 and put them into an internal mixer at a temperature of 122 - 128 °C for internal mixing for 10 - 15 minutes;

[0023] II. Open mixing: Put the internally mixed mixture into an open mill at a temperature of 60 - 65 °C for open mixing for 5 - 7 minutes;

[0024] III. Sheet extrusion: Extrude the open - mixed mixture in a sheet extruder into thin sheets of a set specification;

[0025] IV. Sprinkle white granular materials that can be melted with the thin sheet layer on the upper surface of the thin sheet layer, then cover it with another thin sheet layer, and repeat the above operation N times to form a multi - layer body of a set thickness. Put the multi - layer body into a mold and mold it into an integral block in the mold; N is a natural number greater than or equal to 1

[0026] V. Cutting into blocks: After demolding, cut it into block - shaped bodies of a set specification on a cutting machine;

[0027] VI. Semi - finished product: Place two block - shaped bodies of different colors and set specifications on top of each other in a mold at 80 - 90 °C, and after hot - melt bonding for 19 - 21 seconds, extrude the semi - finished product;

[0028] VII. Finished product: Cut the semi - finished product into a yoga mat of a set shape on a cutting machine, and thus complete the manufacturing process.

[0029] As an improvement, the spreading density of the white granular material in the fourth step can be randomly controlled, that is, covering the surface of the thin sheet with a set amount of white granular material; the particle size of the white granular material is preferably 5-6 mm; the white granular material can be selected as the white granular material after the color masterbatch is foamed, or the white granular material made from 5-7 parts by weight of EVA material, PE material, TPE material, 3-5 parts by weight of RPE material, barium sulfate, foaming agent, crosslinking agent, and color masterbatch after being kneaded, open-milled, then sheeted and crushed; in the molding in the fourth step, the mold temperature can be selected as 165-170 °C, the molding time is preferably 30-45 minutes, the foaming agent is preferably azodicarbonamide; the crosslinking agent is preferably dicumyl peroxide.

[0030] Compared with the prior art, the advantages of the present invention are that the product formula of the present invention is reasonable, the product has good elasticity, and it is bonded with a hot melt glue that does not pollute the environment, so it is environmentally friendly and safe. Moreover, the manufacturing process of the present invention is stable and simpler and more convenient to manufacture. It not only has a lower production cost, but also has a high production efficiency. Detailed implementation manners

[0031] The present invention will be further described in detail below in conjunction with embodiments.

[0032] Embodiment 1. The manufacturing method of the environmentally friendly yoga mat in this embodiment, the formula composition of this yoga mat is as follows: 20 parts by weight of EVA material, 3 parts by weight of PE material, 5 parts by weight of TPE material, 15 parts by weight of RPE material, 29 parts by weight of barium sulfate, 1 part by weight of foaming agent, 0.2 part by weight of zinc oxide, 1 part by weight of crosslinking agent, 3 parts by weight of color masterbatch, where RPE refers to recycled polystyrene; the manufacturing method of the environmentally friendly yoga mat includes the following steps:

[0033] I. Kneading: Mix the raw materials according to the formula and put them into a kneader at a temperature of 122 °C for kneading for 10 minutes;

[0034] II. Open-milling: Put the kneaded mixture into an open mill at a temperature of 60 °C for open-milling for 5 minutes;

[0035] III. Sheeting: Sheet the open-milled mixture in a sheet extruder into a thin sheet layer of a set specification;

[0036] IV. Spread white granular material that can be melted with the thin sheet layer on the upper surface of the thin sheet layer, then cover another thin sheet layer, and repeat the above operation N times to form a multi-layer body of a set thickness. Put the multi-layer body into a mold and mold it into an integral block in the mold; N is a natural number greater than or equal to 1

[0037] V. Cutting into blocks: After taking out of the mold, cut the integral block into block-shaped bodies of a set specification on a cutting machine;

[0038] VI. Cloth laying: Two block-shaped bodies of the same color and specification are arranged butt-jointed front and back and heat-melted together to form a connected block. The upper and lower surfaces of the non-woven fabric that matches the connected block in specification are coated with hot melt adhesive. Then, the non-woven fabric coated with hot melt adhesive is covered on the connected block, and the lower surface of the non-woven fabric is bonded to the connected block to form an integral body;

[0039] VII. Re-cutting: The connected block covered with non-woven fabric is cut at the joint of the block-shaped bodies into block-shaped bodies of the original size with non-woven fabric covering the upper surface;

[0040] VIII. Semi-finished product: The block-shaped body not covered with non-woven fabric that matches is laminated with the block-shaped body covered with non-woven fabric, and is placed in a mold melted at 80 °C in a manner that the non-woven fabric is sandwiched in the middle. After heat-melting and laminating for 19 seconds, a semi-finished product is obtained by taking out the sheet;

[0041] IX. Finished product: The semi-finished product is cut into a yoga mat of a set shape on a cutting machine, and the manufacturing process is completed.

[0042] In step IV, the spreading density of the white granular material is randomly controlled, that is, a set amount of white granular material is spread over the surface of the thin sheet. The particle size of the white granular material is 5 mm. The white granular material is the white granular material after the color masterbatch is foamed, or the white granular material formed by mixing 5 parts by weight of EVA material, PE material, and TPE material, 3 parts by weight of RPE material, barium sulfate, foaming agent, cross-linking agent, and color masterbatch, followed by internal mixing, open mixing, sheet taking out, and pulverization. In the molding in step IV, the mold temperature is 165 °C and the molding time is 30 minutes. The RPE refers to recycled polystyrene. The foaming agent is azodicarbonamide. The cross-linking agent is dicumyl peroxide.

[0043] Example 2. The manufacturing method of the environmentally friendly yoga mat in this example. The formula composition of this yoga mat is as follows: 21 parts by weight of EVA material, 4 parts by weight of PE material, 6 parts by weight of TPE material, 16 parts by weight of RPE material, 30 parts by weight of barium sulfate, 2 parts by weight of foaming agent, 0.3 parts by weight of zinc oxide, 1.25 parts by weight of cross-linking agent, and 4 parts by weight of color masterbatch. The RPE refers to recycled polystyrene. The manufacturing method of the environmentally friendly yoga mat includes the following steps:

[0044] I. Internal mixing: The raw materials according to the formula are mixed and put into an internal mixer at a temperature of 125 °C for internal mixing for 13 minutes;

[0045] II. Open mixing: The mixture after internal mixing is put into an open mixer at a temperature of 62 °C for open mixing for 6 minutes;

[0046] III. Sheet taking out: The mixture after open mixing is taken out into a thin sheet layer of a set specification on a sheet taking out machine;

[0047] IV. Sprinkle white granular materials that can fuse with the thin sheet layer on the upper surface of the thin sheet layer, then cover it with another thin sheet layer, and repeat the above operation N times to form a multi-layer body with a set thickness. Place the multi-layer body into a mold and press it into an integral block in the mold;

[0048] V. Cutting into blocks: After demolding, cut the integral block into block-shaped bodies with set specifications on a cutting machine;

[0049] VI. Laying cloth: Arrange two block-shaped bodies of the same color and specification butt-jointed front and back and fuse them together by heat to form a connected block. Apply hot melt adhesive to both the upper and lower surfaces of the non-woven fabric that matches the connected block. Then, cover the connected block with the non-woven fabric coated with hot melt adhesive so that the lower surface of the non-woven fabric is bonded to the connected block as a whole;

[0050] VII. Cutting again: Cut the connected block covered with non-woven fabric into block-shaped bodies with the upper surface covered with non-woven fabric of the original size at the joints of the block-shaped bodies;

[0051] VIII. Semi-finished product: Fit the block-shaped body without non-woven fabric and the block-shaped body covered with non-woven fabric that match each other up and down, and place them in a mold melted at 85°C in the way that the non-woven fabric is sandwiched in the middle. After hot melt bonding for 20 seconds, take out the sheet to form a semi-finished product;

[0052] IX. Finished product: Cut the semi-finished product into a yoga mat with a set shape on a cutting machine, and thus complete the production process.

[0053] The spreading density of the white granular materials in the step IV is randomly controlled, that is, cover the surface of the thin sheet with a set amount of white granular materials. The particle size of the white granular materials is 5.5 mm. The white granular materials are white particles after the color masterbatch is foamed, or white granular materials formed by mixing 6 parts by weight of EVA material, PE material, and TPE material, 4 parts by weight of RPE material, barium sulfate, foaming agent, cross-linking agent, and color masterbatch, followed by internal mixing, open mixing, sheet extrusion, and pulverization. In the molding in the step IV, the mold temperature is 168°C and the molding time is 40 minutes. The RPE refers to recycled polystyrene. The foaming agent is azodicarbonamide. The cross-linking agent is dicumyl peroxide.

[0054] Example III. The manufacturing method of the environmentally friendly yoga mat in this example. The formula composition of this yoga mat is as follows: 22 parts by weight of EVA material, 5 parts by weight of PE material, 7 parts by weight of TPE material, 17 parts by weight of RPE material, 31 parts by weight of barium sulfate, 3 parts by weight of foaming agent, 0.4 parts by weight of zinc oxide, 1.5 parts by weight of cross-linking agent, and 5 parts by weight of color masterbatch. The RPE refers to recycled polystyrene; The manufacturing method of the environmentally friendly yoga mat includes the following steps:

[0055] I. Kneading: Mix the raw materials according to the formula and put them into a kneader at a temperature of 128°C for 15 minutes of kneading.

[0056] II. Open mill: Put the kneaded mixture into an open mill at a temperature of 65°C for 7 minutes of open milling.

[0057] III. Sheet extrusion: Extrude the mixture after open milling into thin sheets of a set specification on a sheet extruder.

[0058] IV. Sprinkle white granular materials that can melt with the thin sheet layer on the upper surface of the thin sheet layer, then cover it with another thin sheet layer, and repeat the above operation N times to form a multi-layer body of a set thickness. Put the multi-layer body into a mold and press it into an integral block in the mold.

[0059] V. Cutting into blocks: After demolding, cut the integral block into blocks of a set specification on a cutting machine.

[0060] VI. Cloth laying: Arrange two blocks of the same color and specification butt-jointed front and back and melt them together to form a connected block. Coat the upper and lower surfaces of the non-woven fabric matching the connected block with hot melt adhesive. Then, cover the connected block with the coated non-woven fabric so that the lower surface of the non-woven fabric is bonded to the connected block as a whole.

[0061] VII. Cutting again: Cut the connected block with the non-woven fabric laid on it into blocks of the original size with the non-woven fabric covering the upper surface at the connection of the blocks.

[0062] VIII. Semi-finished product: Stack the block without the non-woven fabric covering and the block with the non-woven fabric covering that are matched up and down, and place them in a mold melted at 90°C in the way that the non-woven fabric is sandwiched in the middle. After 21 seconds of hot melt bonding, extrude it into a semi-finished product.

[0063] IX. Finished product: Cut the semi-finished product into a yoga mat of a set shape on a cutting machine, and thus complete the production process.

[0064] In step IV, the spreading density of the white granular materials is randomly controlled, that is, just cover the surface of the thin sheet with a set amount of white granular materials. The particle size of the white granular materials is 6 mm. The white granular materials are white particles after the color masterbatch is foamed, or white granular materials formed by mixing 7 parts by weight of EVA material, PE material, TPE material, RPE material, barium sulfate, foaming agent, cross-linking agent, and color masterbatch, followed by kneading, open milling, sheet extrusion, and pulverization. In the press molding in step IV, the mold temperature is 170°C and the press molding time is 45 minutes. The RPE refers to recycled polystyrene. The foaming agent is azodicarbonamide. The cross-linking agent is dicumyl peroxide.

[0065] Example 4. Another manufacturing method of the environmentally friendly yoga mat in this example. The formula composition of this yoga mat is as follows: 20 parts by weight of EVA material, 3 parts by weight of PE material, 5 parts by weight of TPE material, 15 parts by weight of RPE material, 29 parts by weight of barium sulfate, 1 part by weight of foaming agent, 0.2 part by weight of zinc oxide, 1 part by weight of crosslinking agent, 3 - 5 parts by weight of masterbatch. The RPE refers to recycled polystyrene. The manufacturing method of the environmentally friendly yoga mat consists of the following steps:

[0066] 1. Kneading: Mix the raw materials according to the formula and put them into a kneader at a temperature of 122 °C for kneading for 10 minutes;

[0067] 2. Open mill: Put the kneaded mixture into an open mill at a temperature of 60 °C for open milling for 5 minutes;

[0068] 3. Sheet extrusion: Extrude the open - milled mixture in a sheet extruder into thin sheets of a set specification;

[0069] 4. Sprinkle white granular materials that can fuse with the thin sheet layer on the upper surface of the thin sheet layer, then cover it with another thin sheet layer, and repeat the above operation N times to form a multi - layer body of a set thickness. Put the multi - layer body into a mold and mold it into an integral block in the mold;

[0070] 5. Cutting into blocks: After demolding, cut it into block - shaped bodies of a set specification on a cutting machine;

[0071] 6. Semi - finished product: Place two block - shaped bodies of different colors and set specifications on top of each other in a mold at 80 °C, and after hot - melt bonding for 19 seconds, extrude the semi - finished product;

[0072] 7. Finished product: Cut the semi - finished product into a yoga mat of a set shape on a cutting machine, and thus complete the manufacturing process.

[0073] The spreading density of the white granular materials in step 4 can be randomly controlled, that is, cover the surface of the thin sheet with a set amount of white granular materials. The particle size of the white granular materials is 5 mm. The white granular materials are white granular materials after the masterbatch foams, or white granular materials formed by kneading, open - milling, then sheet - extruding, and pulverizing 5 parts by weight of EVA material, PE material, TPE material, RPE material, barium sulfate, foaming agent, crosslinking agent, and masterbatch. In the molding in step 4, the mold temperature is 165 °C and the molding time is 30 minutes. The foaming agent is azodicarbonamide. The crosslinking agent is dicumyl peroxide.

[0074] Example 5. Another manufacturing method of the eco-friendly yoga mat in this example. The formula composition of this yoga mat is as follows: 21 parts by weight of EVA material, 4 parts by weight of PE material, 6 parts by weight of TPE material, 16 parts by weight of RPE material, 30 parts by weight of barium sulfate, 2 parts by weight of foaming agent, 0.3 parts by weight of zinc oxide, 1.25 parts by weight of crosslinking agent, and 4 parts by weight of masterbatch. The RPE refers to recycled polystyrene. The manufacturing method of the eco-friendly yoga mat consists of the following steps:

[0075] 1. Kneading: Mix the raw materials according to the formula and put them into a kneader at a temperature of 125°C for kneading for 13 minutes;

[0076] 2. Open rolling: Put the kneaded mixture into an open rolling mill at a temperature of 62°C for open rolling for 6 minutes;

[0077] 3. Sheet extrusion: Extrude the open-rolled mixture in a sheet extruder into thin sheets of a set specification;

[0078] 4. Sprinkle white granular materials that can be melted with the thin sheet layer on the upper surface of the thin sheet layer, and then cover it with another thin sheet layer. Repeat the above operation N times to form a multi-layer body of a set thickness. Put the multi-layer body into a mold and mold it into an integral block in the mold;

[0079] 5. Cutting into blocks: After demolding, cut it into block-shaped bodies of a set specification on a cutting machine;

[0080] 6. Semi-finished product: Place two block-shaped bodies of different colors and set specifications on top of each other in a mold at 85°C. After hot melt bonding for 20 seconds, extrude the semi-finished product;

[0081] 7. Finished product: Cut the semi-finished product into a yoga mat of a set shape on a cutting machine, and the manufacturing process is completed.

[0082] The spreading density of the white granular materials in step 4 can be randomly controlled, that is, spread a set amount of white granular materials to cover the surface of the thin sheet. The particle size of the white granular materials is 5.5 mm. The white granular materials are white granular materials after the masterbatch is foamed, or white granular materials formed by kneading, open rolling, then sheet extrusion and pulverization of 6 parts by weight of EVA material, PE material, TPE material, RPE material, barium sulfate, foaming agent, crosslinking agent, and 4 parts by weight of masterbatch. In the molding in step 4, the mold temperature is 168°C and the molding time is 40 minutes. The foaming agent is azodicarbonamide. The crosslinking agent is dicumyl peroxide.

[0083] Example 6. Another manufacturing method of the environmentally friendly yoga mat in this example. The formula composition of this yoga mat is as follows: 22 parts by weight of EVA material, 5 parts by weight of PE material, 7 parts by weight of TPE material, 17 parts by weight of RPE material, 31 parts by weight of barium sulfate, 3 parts by weight of foaming agent, 0.4 parts by weight of zinc oxide, 1.5 parts by weight of crosslinking agent, 5 parts by weight of masterbatch. The RPE refers to recycled polystyrene. The manufacturing method of the environmentally friendly yoga mat consists of the following steps:

[0084] I. Internal mixing: Mix the raw materials according to the formula and put them into an internal mixer at a temperature of 128 °C for internal mixing for 15 minutes;

[0085] II. Open mill mixing: Put the internally mixed mixture into an open mill at a temperature of 65 °C for open mill mixing for 7 minutes;

[0086] III. Sheet extrusion: Extrude the open mill mixed mixture in a sheet extruder into thin sheets of a set specification;

[0087] IV. Sprinkle white granular materials that can be melted with the thin sheet layer on the upper surface of the thin sheet layer, then cover it with another thin sheet layer, and repeat the above operation N times to form a multi-layer body of a set thickness. Put the multi-layer body into a mold and mold it into an integral block in the mold;

[0088] V. Cutting into blocks: After demolding, cut it into block-shaped bodies of a set specification on a cutting machine;

[0089] VI. Semi-finished product: Place two block-shaped bodies of different colors and set specifications on top of each other in a mold at 90 °C, and after hot melt bonding for 21 seconds, extrude the semi-finished product;

[0090] VII. Finished product: Cut the semi-finished product into a yoga mat of a set shape on a cutting machine, and thus complete the manufacturing process.

[0091] The spreading density of the white granular materials in the step IV can be randomly controlled, that is, just cover the surface of the thin sheet with a set amount of white granular materials; the particle size of the white granular materials is 6 mm; the white granular materials are white granular materials after the masterbatch is foamed, or white granular materials formed by mixing 7 parts by weight of EVA material, PE material, TPE material, RPE material, barium sulfate, foaming agent, crosslinking agent, and masterbatch through internal mixing, open mill mixing, then sheet extrusion and pulverization; in the molding in the step IV, the mold temperature is 170 °C and the molding time is 45 minutes. The foaming agent is azodicarbonamide; the crosslinking agent is dicumyl peroxide.

Claims

1. A method for making an environmentally friendly yoga mat, characterized in that: The formula of the yoga mat is as follows: 20-22 parts by weight of EVA material, 3-5 parts by weight of PE material, 5-7 parts by weight of TPE material, 15-17 parts by weight of RPE material, 29-31 parts by weight of barium sulfate, 1-3 parts by weight of foaming agent, 0.2-0.4 parts by weight of zinc oxide, 1-1.5 parts by weight of cross-linking agent, and 3-5 parts by weight of masterbatch, wherein the RPE refers to recycled step ethylene; the method for making the environmentally friendly yoga mat comprises the following steps:

1. Internal Mixing: Mix the raw materials according to the formula and put them into an internal mixer at a temperature of 122-128℃ for 10-15 minutes; 2. Open refining: put the mixed material into an open refining mill at a temperature of 60-65°C and refining for 5-7 minutes; 3. Slicing: Slice the mixed material after milling into thin sheets of set specifications in the slicing machine; Fourth, white granular material that can be melted with the thin sheet layer is spread on the upper surface of the thin sheet layer, and then covered with another thin sheet layer, and the above operation is repeated N times to form a multi-layer body with a set layer degree, and the multi-layer body is placed in a mold and molded into an integral block in the mold; the N is a natural number greater than or equal to 1.

5. Cutting into blocks: After demoulding, the whole block is cut into blocks of set specifications on a cutting machine; 6. Spreading: Arrange two blocks of the same color and specification front and back and heat-melt them together to form a conjoined block. Apply hot-melt adhesive on the upper and lower surfaces of the non-woven fabric that matches the conjoined block. Then, cover the conjoined block with the non-woven fabric coated with hot-melt adhesive so that the lower surface of the non-woven fabric is bonded to the conjoined block as a whole.

7. Cutting again: Cut the connected blocks covered with non-woven fabrics at the connection points of the blocks into blocks of original size with the upper surfaces covered with non-woven fabrics; 8. Semi-finished products: The matching block without non-woven fabric and the block covered with non-woven fabric are laminated together, and the non-woven fabric is placed in a mold hot-melted at 80-90℃ in a way that the non-woven fabric is sandwiched in the middle. After hot-melt lamination for 19-21 seconds, the semi-finished product is produced; 9. Finished product: The semi-finished product is cut into a yoga mat of a set shape on a cutting machine, and the production process is completed.

2. The method according to claim 1, characterized in that: The spreading density of the white granular material in step 4 is randomly controlled, that is, a set amount of white granular material is spread all over the surface of the sheet.

3. The method according to claim 2, characterized in that: The particle size of the white granular material is 5-6 mm.

4. The method according to claim 3, characterized in that: The white granular material is white granular material after the masterbatch is foamed, or is white granular material made by mixing 5 to 7 parts by weight of EVA material, PE material, TPE material, RPE material, barium sulfate, foaming agent, crosslinking agent, and masterbatch 3 to 5 parts through internal mixing, open mixing, sheeting, and crushing.

5. The method according to claim 4, characterized in that: In the molding process in step 4, the mold temperature is 165-170° C., and the molding time is 30-45 minutes.

6. The method according to any one of claims 1 to 5, characterized in that: The yoga mat (1) has the following formula composition: 21 parts by weight of EVA material, 4 parts by weight of PE material, 6 parts by weight of TPE material, 16 parts by weight of RPE material, 30 parts by weight of barium sulfate, 2 parts by weight of foaming agent, 0.3 parts by weight of zinc oxide, 1.3 parts by weight of cross-linking agent, and 4 parts by weight of masterbatch, wherein the RPE refers to recycled polyethylene.

7. The method according to claim 6, characterized in that: The foaming agent is azodicarbonamide.

8. The method according to claim 7, characterized in that: The cross-linking agent is dicumyl peroxide.

9. A method for making an environmentally friendly yoga mat, characterized in that: The formula of the yoga mat is as follows: 20-22 parts by weight of EVA material, 3-5 parts by weight of PE material, 5-7 parts by weight of TPE material, 15-17 parts by weight of RPE material, 29-31 parts by weight of barium sulfate, 1-3 parts by weight of foaming agent, 0.2-0.4 parts by weight of zinc oxide, 1-1.5 parts by weight of cross-linking agent, and 3-5 parts by weight of masterbatch, wherein the RPE refers to recycled step ethylene; the method for making the environmentally friendly yoga mat comprises the following steps:

1. Internal Mixing: Mix the raw materials according to the formula and put them into an internal mixer at a temperature of 122-128℃ for 10-15 minutes; 2. Open refining: put the mixed material into an open refining mill at a temperature of 60-65°C and refining for 5-7 minutes; 3. Slicing: Slice the mixed material after milling into slices of set specifications in the slicer; Fourth, spread white granular material that can be melted with the thin layer on the upper surface of the thin layer, and then cover it with another thin layer. Repeat the above operation N times to form a multi-layer body with a set layer degree. Put the multi-layer body into a mold and mold it into an integral block in the mold; 5. Cutting into blocks: After leaving the mold, cut into blocks of set specifications on the cutting machine; 6. Semi-finished product: Place two blocks of different colors and set specifications in a mold at 80-90℃, and hot-melt them for 19-21 seconds to produce a semi-finished product.

7. Finished product: The semi-finished product is cut into a yoga mat of a set shape on a cutting machine, and the production process is completed.

10. The manufacturing method according to claim 9, characterized in that: The spreading density of the white granular material in the step 4 can be randomly controlled, that is, a set amount of white granular material can be spread all over the surface of the sheet; the particle size of the white granular material is 5-6mm; the white granular material is white granular material after foaming the masterbatch, or is white granular material obtained by mixing 5-7 parts by weight of EVA material, PE material, TPE material, RPE material, barium sulfate, foaming agent, cross-linking agent, and masterbatch 3-5, and then discharging and crushing the mixture; in the molding in the step 4, the mold temperature is 165-170°C, the molding time is 30-45 minutes, the foaming agent is azodicarbonamide; and the cross-linking agent is diisopropylbenzene peroxide.