Preparation formula and preparation method of micro-boron ultralight clay

Abstract

The invention discloses a preparation formula and a preparation method of micro-boron ultralight clay, and the preparation formula of the micro-boron ultralight clay comprises the following components: 50-80 parts of PVA glue solution, 10-15 parts of borax solution, 5-8 parts of pH buffer solution, 10-20 parts of foaming agent and 10-20 parts of bitter agent. By remarkably reducing the migration amount of boron in the finished product, potential health risks caused by long-term contact or mistaken eating of children are fundamentally reduced, the increasingly strict children product safety regulations are further met, the final colored clay product has stronger product competitive advantages, in addition, by adding the pH buffer solution, the product quality is improved, and the product quality is improved. The product can not only protect the delicate skin of children and avoid allergy or irritation, but also prevent the PVA glue solution from hydrolysis or cross-linking reaction under acidic or alkaline conditions, thereby prolonging the storage life of the product and keeping the performance stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of children's educational toy materials, and further relates to a production formula of micro-boron ultra-light clay and a preparation method thereof. BACKGROUND

[0002] At present, soft mud toys such as ultra-light clay, crystal mud and foaming glue are popular in children's handmade and stress-relieving toy markets due to their rich colors and strong plasticity. Such products are usually mainly composed of polyvinyl alcohol, borax, water, foaming agent, colorant and humectant. Based on the reaction of polyvinyl alcohol adhesive and crosslinking agent mainly composed of borax to form a gel structure to realize stretching, shaping and other properties. However, high content of borax is generally used as a crosslinking agent in the prior art, which leads to serious safety hazards in the product. In the national standard "Guidelines for the Use of Key Chemical Substances in Consumer Products" (GB / T 39498-2020), it is clearly stipulated that the migration amount of boron in liquid or sticky toy materials should be ≤300mg / kg, and the addition of boron in food is prohibited. At the same time, boron is also an essential trace element for the human body. Adding borax in food may cause cumulative damage to the human body. Long-term excessive intake of boron has toxic effects on human reproduction, development and endocrine system. At present, some manufacturers use borax to make ultra-light clay, and the migration amount of boron in the ultra-light clay can meet the current detection standard. However, the content of boron cannot be effectively reduced, and the toxicity cannot be eliminated by simple process. Children directly contact the skin during play, or mistakenly eat the residual borax through the mouth, which can easily cause allergies, corneal damage and even acute poisoning. Although some people in the industry have tried to develop boron-free formulas, completely removing borax often leads to a decrease in the viscoelasticity of the product, poor forming property or a shortened shelf life, which makes it difficult to meet the use requirements.

[0003] Therefore, it is urgent to develop a production formula of micro-boron ultra-light clay and a preparation process thereof to solve the technical problems in the prior art. SUMMARY

[0004] In view of the above technical problems, the purpose of the present application is to provide a production formula of micro-boron ultra-light clay, which can solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The present application provides a production formula of micro-boron ultra-light clay, which comprises the following components: PVA glue solution, the component of the PVA glue solution is 50-80 parts; borax solution, the component of the borax solution is 10-15 parts; pH buffer solution, the component of the pH buffer solution is 5-8 parts; foaming agent, the component of the foaming agent is 10-20 parts; The bittering agent has a component of 0.01-0.03 parts.

[0006] In some embodiments, the PVA glue solution has a mass-volume percentage concentration of 5%-11%.

[0007] In some embodiments, the borax solution has a mass-volume percentage concentration of 2%-8%.

[0008] In some embodiments, the foaming agent is any one of a hydrogenated fluorochlorocarbon foaming agent, an expandable microsphere foaming agent, and a hydrogenated fluoralkane foaming agent.

[0009] In some embodiments, the expandable microsphere foaming agent is Expancel, any one of model 461DU, 920DU120.

[0010] In some embodiments, the pH buffer is any one of a BT-8 buffer and a BLUE BUFFER 8 buffer.

[0011] According to another aspect of the present application, the present application further provides a preparation method of micro-boron ultra-light clay, for preparing the micro-boron ultra-light clay according to any one of the above embodiments, comprising the following steps: S1, configuring a PVA glue solution and a borax solution according to a preset ratio; S2, mixing the PVA glue solution and the borax solution to obtain a clay base; S3, adding a pH buffer to the clay base to adjust the pH to 6-8; S4, adding a foaming agent to the product obtained in step S3 and stirring uniformly; S5, further adding a bittering agent, mixing uniformly to a uniform paste, and performing a curing treatment to obtain the micro-boron ultra-light clay.

[0012] In some embodiments, S6, placing the micro-boron ultra-light clay in a molding device to package and prepare a clay product.

[0013] Compared with the prior art, the micro-boron ultra-light clay provided by the present application has at least the following beneficial effects: 1. The present application significantly reduces the migration amount of boron elements in the finished product, fundamentally reduces the potential health risks of children caused by long-term contact or accidental ingestion, and thus meets the increasingly stringent children's product safety regulations, thereby providing the final clay product with stronger product competitive advantage; 2. The present application adds a pH buffer, which not only protects the delicate skin of children and avoids allergies or irritation, but also prevents the hydrolysis or cross-linking reaction of the PVA glue solution under acidic or alkaline conditions, thereby prolonging the storage life of the product and maintaining stable performance; 3、The present application can effectively prevent children from eating by adding a small amount of bittering agent, and the strong bitter taste makes children spit out immediately after putting it in the mouth, thereby playing an important safety warning role. DETAILED DESCRIPTION The endpoints of the ranges and any values disclosed in the present application are not limited to the precise values recited as the exact dimensions are not critical to the present application. The endpoints of the ranges and any values are to be understood as encompassing values approximating the recited endpoints and values between the recited endpoints as well as the recited endpoints themselves. For values having a range, the endpoints of the ranges are combinable with one another to form new ranges having a value that is the sum or average of the endpoints of the ranges.

[0015] The main raw materials used in the examples and comparative examples and the content of the components thereof are shown as follows: The present application is further described in detail below in conjunction with the examples and comparative examples.

[0016] Examples 1-2 and Comparative Examples 1-4 provide a preparation formula and a preparation method of micro-boron ultra-light clay.

[0017] Example 1 Example 1 provides a preparation formula and a preparation method of micro-boron ultra-light clay. The preparation method of the micro-boron ultra-light clay comprises the following steps: First, PVA glue solution and borax solution are prepared according to a predetermined ratio, wherein the mass-volume percentage concentration of the PVA glue solution is 8%, and the mass-volume percentage concentration of the borax solution is 5%. Then, BT-8 buffer solution, Expancel 461DU expandable microsphere foaming agent and bittering agent are weighed according to the formula. Next, the PVA glue solution and the borax solution are mixed, wherein the specific ratio is that the component of the PVA glue solution is 70 parts, the component of the borax solution is 13 parts, the component of the BT-8 buffer solution is 7 parts, the component of the Expancel 461DU expandable microsphere foaming agent is 15 parts, and the component of the bittering agent is 0.02 parts, to obtain a clay base. The BT-8 buffer solution is added to the clay base to adjust the pH to 7. The expandable microsphere foaming agent is added to the product obtained in step S3 and stirred uniformly. Further, the bittering agent is added and mixed uniformly to a uniform paste. After aging treatment, the micro-boron ultra-light clay is obtained.

[0018] Example 2 Example 2 provides a preparation formula and a preparation method of micro-boron ultra-light clay. The preparation method of the micro-boron ultra-light clay comprises the following steps: First, configure PVA glue liquid and borax liquid according to a preset ratio, wherein the mass-volume percentage concentration of the PVA glue liquid is 8%, and the mass-volume percentage concentration of the borax liquid is 5%; then, take 920DU120 buffer, hydrogenated fluorochlorocarbon foaming agent and bittering agent according to the formula; then, mix the PVA glue liquid and the borax liquid, wherein the specific ratio is that the component of the PVA glue liquid is 70 parts, the component of the borax liquid is 13 parts, the component of the BT-8 buffer is 7 parts, the component of the hydrogenated fluorochlorocarbon foaming agent is 15 parts, and the component of the bittering agent is 0.02 parts, to obtain a clay base; add the 920DU120 buffer to the clay base to adjust the pH to 7; add the expandable microsphere foaming agent to the product obtained in step S3 and stir uniformly; further add the bittering agent and mix uniformly to a uniform paste; after aging treatment, a micro-boron ultra-light clay is obtained.

[0019] Comparative Example 1 Comparative Example 1 provides a preparation formula of a micro-boron ultra-light clay and a preparation method thereof. The preparation method of the micro-boron ultra-light clay comprises the following steps: First, configure PVA glue liquid and borax liquid according to a preset ratio, wherein the mass-volume percentage concentration of the PVA glue liquid is 8%, and the mass-volume percentage concentration of the borax liquid is 11%; then, take BT-8 buffer, Expancel461DU expandable microsphere foaming agent and bittering agent according to the formula; then, mix the PVA glue liquid and the borax liquid, wherein the specific ratio is that the component of the PVA glue liquid is 70 parts, the component of the borax liquid is 13 parts, the component of the BT-8 buffer is 7 parts, the component of the Expancel461DU expandable microsphere foaming agent is 15 parts, and the component of the bittering agent is 0.02 parts, to obtain a clay base; add the BT-8 buffer to the clay base to adjust the pH to 7; add the expandable microsphere foaming agent to the product obtained in step S3 and stir uniformly; further add the bittering agent and mix uniformly to a uniform paste; after aging treatment, a micro-boron ultra-light clay is obtained.

[0020] Comparative Example 2 Comparative Example 2 provides a preparation formula of a micro-boron ultra-light clay and a preparation method thereof. The preparation method of the micro-boron ultra-light clay comprises the following steps: First, configure PVA glue liquid and borax liquid according to a preset ratio, wherein the mass-volume percentage concentration of the PVA glue liquid is 8%, and the mass-volume percentage concentration of the borax liquid is 5%; then, take BT-8 buffer, Expancel 461DU expandable microsphere foaming agent and bittering agent according to a formula; then, mix the PVA glue liquid and the borax liquid, wherein the specific ratio is that the component of the PVA glue liquid is 40 parts, the component of the borax liquid is 25 parts, the component of the BT-8 buffer is 7 parts, the component of the expandable microsphere foaming agent is 15 parts, and the component of the bittering agent is 0.02 parts, to obtain a clay base; add the BT-8 buffer to the clay base to adjust the pH to 7; add the expandable microsphere foaming agent to the product obtained in step S3 and stir uniformly; further add the bittering agent and mix uniformly to a uniform paste; after aging treatment, a micro-boron ultra-light clay is obtained.

[0021] Comparative Example 3 Comparative Example 3 provides a formula for making a micro-boron ultra-light clay and a preparation method thereof. The preparation method of the micro-boron ultra-light clay comprises the following steps: First, configure PVA glue liquid and borax liquid according to a preset ratio, wherein the mass-volume percentage concentration of the PVA glue liquid is 8%, and the mass-volume percentage concentration of the borax liquid is 5%; then, take Expancel 461DU expandable microsphere foaming agent and bittering agent according to a formula; then, mix the PVA glue liquid and the borax liquid, wherein the specific ratio is that the component of the PVA glue liquid is 70 parts, the component of the borax liquid is 13 parts, the component of the expandable microsphere foaming agent is 15 parts, and the component of the bittering agent is 0.02 parts, to obtain a clay base; add the expandable microsphere foaming agent to the product obtained in step S3 and stir uniformly; further add the bittering agent and mix uniformly to a uniform paste; after aging treatment, a micro-boron ultra-light clay is obtained.

[0022] Comparative Example 4 Comparative Example 4 provides a formula for making a micro-boron ultra-light clay and a preparation method thereof. The preparation method of the micro-boron ultra-light clay comprises the following steps: First, configure PVA glue liquid and borax liquid according to a preset ratio, wherein the mass-volume percentage concentration of the PVA glue liquid is 8%, and the mass-volume percentage concentration of the borax liquid is 5%; then, take BT-8 buffer and Expancel 461DU expandable microsphere foaming agent according to a formula; then, mix the PVA glue liquid and the borax liquid, wherein the specific ratio is that the component of the PVA glue liquid is 70 parts, the component of the borax liquid is 13 parts, the component of the BT-8 buffer is 7 parts, and the component of the expandable microsphere foaming agent is 15 parts, to obtain a clay base; add the BT-8 buffer to the clay base to adjust the pH to 7; add the expandable microsphere foaming agent to the product obtained in step S3 and stir uniformly; mix uniformly to a uniform paste; after aging treatment, a micro-boron ultra-light clay is obtained.

[0023] Performance detection The microboron ultra-light clay prepared in Examples 1-2 and Comparative Examples 1-4 was detected for molding time, toxicity, bitterness and tensile strength, wherein the toxicity was judged by detecting the boron migration amount in the sample, specifically by checking the heavy metal interception rate, and the results are shown in Table 1.

[0024] Table 1

[0025] As can be seen from Table 1, in Examples 1-2, the comprehensive performance of Example 1 is the most balanced, and the sample prepared in Examples 1-2 has more excellent comprehensive performance compared to Comparative Examples 1, 2, 3 and 4, so it can be seen that reasonable raw material parameters and reasonable process parameters can bring better comprehensive performance to the clay product.

[0026] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A formula for making micro-boron ultra-light clay, characterized in that, Comprising the following components: PVA glue solution, the component of the PVA glue solution is 50-80 parts; borax solution, the component of the borax solution is 10-15 parts; pH buffer solution, the component of the pH buffer solution is 5-8 parts; foaming agent, the component of the foaming agent is 10-20 parts; bittering agent, the component of the bittering agent is 0.01-0.03 parts.

2. The production formula of micro-boron ultra-light clay according to claim 1, wherein the mass-volume percentage concentration of the PVA glue solution is 5%-11%.

3. The production formula of micro-boron ultra-light clay according to claim 1, wherein the mass-volume percentage concentration of the borax solution is 2%-8%.

4. The production formula of micro-boron ultra-light clay according to claim 3, wherein the foaming agent is any one of hydrogenated fluorochlorocarbon foaming agent, expandable microsphere foaming agent, and hydrogenated fluoralkane foaming agent.

5. The production formula of micro-boron ultra-light clay according to any one of claims 1-4, wherein the expandable microsphere foaming agent is Expancel, any one of model 461DU, 920DU120.

6. The production formula of micro-boron ultra-light clay according to claim 5, wherein the pH buffer solution is any one of BT-8 buffer solution and BLUEBUFFER8 buffer solution. Comprising the following steps: S1, configuring PVA glue solution and borax solution according to a predetermined ratio; S2, mixing the PVA glue solution and the borax solution to obtain clay base material; S3, adding pH buffer solution to the clay base material to adjust the pH to 6-8; S4, adding foaming agent to the product obtained in step S3 and stirring uniformly; 7. A method for preparing a micro-boron ultra-lightweight clay for use in the preparation of a micro-boron ultra-lightweight clay according to claims 1-6, characterized in that, S5, further adding bittering agent, mixing uniformly to uniform paste, and then performing aging treatment to obtain micro-boron ultra-light clay. Further comprising: S6, placing the micro-boron ultra-light clay in a molding device to encapsulate and obtain clay product. ​ ​ ​ 8. The method for preparing microboron ultralight clay according to claim 7, characterized in that, ​ ​

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