Preparation method of long-cylinder chemical defense gloves based on modified spent bleaching clay compound

Abstract

The invention discloses a preparation method of long-barrel chemical defense gloves based on a modified spent bleaching clay compound. The preparation method comprises the following steps: S1, purchased industrial spent bleaching clay is subjected to high-temperature sufficient calcination in a muffle furnace, cooled to room temperature, collected and bagged, and dried and stored for later use; s2, taking the dried spent bleaching clay, crushing and scattering by a crusher, stirring and dispersing by using a dispersion liquid to form a suspension, finally adding casein, stirring, and putting into a ball milling tank for ball milling to obtain a modified spent bleaching clay compound; s3, adding the modified spent bleaching clay compound into the raw materials, and mixing and stirring to prepare dipping latex; s4, sleeving the glove core on the hand mold, and carrying out preheating treatment; s5, dipping the preheated glove core in a coagulating agent; s6, pre-vulcanization and high-temperature vulcanization treatment are sequentially carried out; and S7, demolding to obtain the long-cylinder chemical protective gloves. The method has the advantage that the sagging problem of the long-barrel chemical defense latex can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of glove preparation, and in particular to a method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite. Background Art

[0002] As a special type of gloves, the manufacturing process of long-tube chemical protective gloves combines the basic process of nitrile smooth gloves with the processing technology of ultra-fine foaming curing / frosting. Due to the particularity of the process, the latex formula of long-tube chemical protective gloves is prone to slippage, which makes it very easy for long-tube chemical protective gloves to be scrapped during production, which is a major difficulty in the process. Summary of the invention

[0003] The purpose of the present invention is to provide a method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite, so as to improve the sagging problem of the long-tube chemical-resistant latex.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A method for preparing a long-tube chemical-resistant glove based on a modified waste clay composite, characterized in that it comprises the following steps:

[0006] S1, calcining the purchased industrial waste clay in a muffle furnace at high temperature, cooling it to room temperature, collecting it in bags, and drying and storing it for later use;

[0007] S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a dispersion liquid to form a suspension, and finally adding casein, stirring and putting it into a ball mill for ball milling to obtain a modified waste clay composite;

[0008] S3, adding the modified waste clay composite to the raw material and mixing and stirring to prepare an impregnated latex;

[0009] S4, taking the glove core and putting it on the hand mold for preheating;

[0010] S5, dipping the preheated glove core into a coagulant;

[0011] S6, performing pre-vulcanization and high temperature vulcanization treatment in sequence;

[0012] S7, demoulding to obtain the long tube chemical resistant gloves.

[0013] Preferably, the calcination temperature of the industrial waste clay in S1 is 800-1200° C., and the calcination time is 1-3 h.

[0014] Preferably, the dispersion in S2 is a KOH solution with a mass fraction of 5%, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 5-10 hours, and the stirring temperature is 10-40°C.

[0015] Preferably, the amount of casein added to S2 is 5% of the weight of the suspension, the stirring time is 1-3 hours, the spheroidal graphite time is 72-96 hours, and the modified waste clay composite is in a colloidal state.

[0016] Preferably, the impregnated latex in S3 includes the following raw materials by weight: 80-100 parts of nitrile latex, 0.8-1 parts of KOH, 1-3 parts of sulfur, 2-3 parts of zinc oxide, 1-3 parts of accelerator ZDEC, 1-2 parts of surfactant, 1-5 parts of modified waste clay composite, and 1-2 parts of black pigment.

[0017] Preferably, the surfactant is selected from sodium dodecylbenzene sulfonate or sodium dodecyl sulfate.

[0018] Preferably, the preheating temperature in S4 is 60-80°C.

[0019] Preferably, the methanol solution of acetic acid, the coagulant, in S5 has a mass fraction of 1-6%.

[0020] Preferably, the pre-vulcanization temperature in S6 is 60-90°C, and the high temperature vulcanization temperature is 105-110°C.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. As an industrial solid waste, waste clay requires factories to spend a certain amount of money to properly handle it. This process not only increases costs, but also cannot directly create profits. By using industrial waste clay through modification and other means, it has a certain utilization value and can solve the problem of latex sagging process of gloves.

[0023] 2. Since industrial waste clay absorbs a large amount of oil and other organic matter, the waste clay is pre-treated by high-temperature calcination to remove the oil and other organic matter, restore its activity to a certain extent, and open the porous structure for modification. The calcined waste clay is post-treated with casein, and the treated colloid is the anti-sagging agent.

[0024] 3. Waste clay has a large specific surface area and surface energy, and can form an effective physical barrier in latex, hindering the free flow of latex on the vertical surface, thereby reducing the sagging phenomenon. The addition of modified waste clay complex, namely waste clay-casein complex, will increase the volume and viscosity of latex, so that the latex can better adhere to the substrate during the construction process and is not easy to flow.

[0025] 4. Anti-sagging agent The waste clay-casein complex has good suspension properties, can be evenly dispersed in latex and maintain long-term stability, prevent latex stratification and precipitation, thereby maintaining the uniformity and consistency of the latex and reducing the risk of sagging.

[0026] 5. The waste clay-casein complex has a certain charge and polar groups, which can absorb polar molecules and ions in latex to form a stable colloidal structure. This colloidal structure plays a role similar to a thixotropic agent in latex, which can reduce the viscosity under shear force and restore the viscosity under static state, which helps to control the fluidity of latex and prevent sagging.

[0027] 6. Waste clay itself does not directly participate in the chemical reaction of latex, but the active groups on its surface may interact with the components in the latex, such as forming hydrogen bonds or van der Waals forces, further enhancing the cohesion and adhesion of the latex and reducing sagging. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described below, and these embodiments do not constitute a limitation of the present invention.

[0029] Example 1

[0030] A method for preparing long-tube chemical-resistant gloves comprises the following steps:

[0031] S3, preparing a dipping latex: the following raw materials are included by weight: 100 parts of nitrile latex, 0.8 parts of KOH, 3 parts of sulfur, 3 parts of zinc oxide, 3 parts of accelerator ZDEC, 1 part of surfactant sodium dodecylbenzene sulfonate, and 1 part of black pigment;

[0032] S4, taking the glove core and putting it on the hand mold, and preheating it, the preheating temperature is 60°C;

[0033] S5, dipping the preheated glove core into a coagulant, a methanol solution of acetic acid, with a mass fraction of 1%;

[0034] S6, pre-vulcanization and high-temperature vulcanization treatment are performed in sequence, the pre-vulcanization temperature is 60°C, and the high-temperature vulcanization temperature is 105°C;

[0035] S7, demoulding to obtain the long tube chemical resistant gloves.

[0036] Example 2

[0037] A method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite comprises the following steps:

[0038] S1, calcining the purchased industrial waste clay in a muffle furnace at a high temperature of 800°C for 3 hours, cooling to room temperature, collecting and bagging, and drying and storing for later use;

[0039] S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a 5% KOH solution to form a suspension, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 10 hours, the stirring temperature is 40°C, and finally adding casein, the amount of casein added is 5% of the weight of the suspension, the stirring time is 1 hour, and after stirring, it is put into a ball mill for ball milling, and the ball milling time is 72 hours to obtain a colloidal modified waste clay composite;

[0040] S3, adding the modified waste clay composite to the raw materials and mixing and stirring to prepare an impregnated latex, wherein the impregnated latex comprises the following raw materials by weight: 100 parts of nitrile latex, 0.8 parts of KOH, 3 parts of sulfur, 3 parts of zinc oxide, 3 parts of accelerator ZDEC, 1 part of surfactant sodium dodecylbenzene sulfonate, 1 part of the modified waste clay composite, and 1 part of black pigment;

[0041] S4, taking the glove core and putting it on the hand mold, and preheating it, the preheating temperature is 60°C;

[0042] S5, dipping the preheated glove core into a coagulant, a methanol solution of acetic acid, with a mass fraction of 1%;

[0043] S6, pre-vulcanization and high-temperature vulcanization treatment are performed in sequence, the pre-vulcanization temperature is 60°C, and the high-temperature vulcanization temperature is 105°C;

[0044] S7, demoulding to obtain the long tube chemical resistant gloves.

[0045] Example 3

[0046] A method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite comprises the following steps:

[0047] S1, calcining the purchased industrial waste clay in a muffle furnace at a high temperature of 1000°C for 2 hours, cooling to room temperature, collecting and bagging, and drying and storing for later use;

[0048] S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a 5% KOH solution to form a suspension, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 7 hours, the stirring temperature is 20°C, and finally adding casein, the amount of casein added is 5% of the weight of the suspension, the stirring time is 2 hours, and after stirring, it is put into a ball mill for ball milling, and the ball milling time is 82 hours to obtain a colloidal modified waste clay composite;

[0049] S3, adding the modified waste clay composite to the raw materials and mixing and stirring to prepare an impregnated latex, wherein the impregnated latex comprises the following raw materials by weight: 90 parts of nitrile latex, 0.9 parts of KOH, 2 parts of sulfur, 2 parts of zinc oxide, 2 parts of accelerator ZDEC, 2 parts of surfactant sodium dodecylbenzene sulfonate, 2 parts of modified waste clay composite, and 1 part of black pigment;

[0050] S4, taking the glove core and putting it on the hand mold, and preheating it, the preheating temperature is 70°C;

[0051] S5, dipping the preheated glove core into a coagulant, which is a methanol solution of acetic acid with a mass fraction of 2%;

[0052] S6, pre-vulcanization and high-temperature vulcanization treatment are performed in sequence, the pre-vulcanization temperature is 70°C, and the high-temperature vulcanization temperature is 107°C;

[0053] S7, demoulding to obtain the long tube chemical resistant gloves.

[0054] Example 4

[0055] A method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite comprises the following steps:

[0056] S1, calcining the purchased industrial waste clay in a muffle furnace at a high temperature of 1000°C for 2 hours, cooling to room temperature, collecting and bagging, and drying and storing for later use;

[0057] S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a 5% KOH solution to form a suspension, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 7 hours, the stirring temperature is 20°C, and finally adding casein, the amount of casein added is 5% of the weight of the suspension, the stirring time is 2 hours, and after stirring, it is put into a ball mill for ball milling, and the ball milling time is 82 hours to obtain a colloidal modified waste clay composite;

[0058] S3, adding the modified waste clay composite to the raw materials and mixing and stirring to prepare an impregnated latex, wherein the impregnated latex comprises the following raw materials by weight: 90 parts of nitrile latex, 0.9 parts of KOH, 2 parts of sulfur, 2 parts of zinc oxide, 2 parts of accelerator ZDEC, 2 parts of surfactant sodium dodecyl sulfate, 3 parts of the modified waste clay composite, and 1 part of black pigment;

[0059] S4, taking the glove core and putting it on the hand mold, and preheating it, the preheating temperature is 70°C;

[0060] S5, dipping the preheated glove core into a coagulant, which is a methanol solution of acetic acid with a mass fraction of 2%;

[0061] S6, pre-vulcanization and high-temperature vulcanization treatment are performed in sequence, the pre-vulcanization temperature is 70°C, and the high-temperature vulcanization temperature is 107°C;

[0062] S7, demoulding to obtain the long tube chemical resistant gloves.

[0063] Example 5

[0064] A method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite comprises the following steps:

[0065] S1, calcining the purchased industrial waste clay in a muffle furnace at a high temperature of 1000°C for 2 hours, cooling to room temperature, collecting and bagging, and drying and storing for later use;

[0066] S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a 5% KOH solution to form a suspension, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 7 hours, the stirring temperature is 20°C, and finally adding casein, the amount of casein added is 5% of the weight of the suspension, the stirring time is 2 hours, and after stirring, it is put into a ball mill for ball milling, and the ball milling time is 82 hours to obtain a colloidal modified waste clay composite;

[0067] S3, adding the modified waste clay compound to the raw materials and mixing and stirring to prepare an impregnated latex, wherein the impregnated latex comprises the following raw materials by weight: 90 parts of nitrile latex, 0.9 parts of KOH, 2 parts of sulfur, 2 parts of zinc oxide, 2 parts of accelerator ZDEC, 2 parts of surfactant sodium dodecyl sulfate, 4 parts of the modified waste clay compound, and 1 part of black pigment;

[0068] S4, taking the glove core and putting it on the hand mold, and preheating it, the preheating temperature is 70°C;

[0069] S5, dipping the preheated glove core into a coagulant, which is a methanol solution of acetic acid with a mass fraction of 4%;

[0070] S6, pre-vulcanization and high-temperature vulcanization treatment are performed in sequence, the pre-vulcanization temperature is 70°C, and the high-temperature vulcanization temperature is 107°C;

[0071] S7, demoulding to obtain the long tube chemical resistant gloves.

[0072] Example 6

[0073] A method for preparing long-tube chemical-resistant gloves based on a modified waste clay composite comprises the following steps:

[0074] S1, calcining the purchased industrial waste clay in a muffle furnace at a high temperature of 1200°C for 3 hours, cooling to room temperature, collecting and bagging, and drying and storing for later use;

[0075] S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a 5% KOH solution to form a suspension, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 10 hours, the stirring temperature is 10°C, and finally adding casein, the amount of casein added is 5% of the weight of the suspension, the stirring time is 1-3 hours, and after stirring, it is placed in a ball mill for ball milling, and the ball milling time is 72 hours to obtain a colloidal modified waste clay composite;

[0076] S3, adding the modified waste clay composite to the raw materials and mixing and stirring to prepare an impregnated latex, wherein the impregnated latex comprises the following raw materials by weight: 100 parts of nitrile latex, 1 part of KOH, 3 parts of sulfur, 3 parts of zinc oxide, 3 parts of accelerator ZDEC, 2 parts of surfactant sodium dodecyl sulfate, 5 parts of the modified waste clay composite, and 2 parts of black pigment;

[0077] S4, taking the glove core and putting it on the hand mold, and preheating it, the preheating temperature is 80°C;

[0078] S5, dipping the preheated glove core into a coagulant, which is a methanol solution of acetic acid with a mass fraction of 6%;

[0079] S6, performing pre-vulcanization and high-temperature vulcanization treatments in sequence, the pre-vulcanization temperature is 90°C, and the high-temperature vulcanization temperature is 110°C;

[0080] S7, demoulding to obtain the long tube chemical resistant gloves.

[0081] The long tube chemical protective gloves prepared in the above Examples 1 to 6 were subjected to performance tests. The glove mechanical properties (abrasion resistance, puncture resistance, tearing resistance, and cutting resistance) were measured using the EN388 test method. The glove sag resistance was tested with reference to GB9264-88 Test Method for Relative Sagging of Paints. The specific test results are shown in Table 1.

[0082] Table 1 Performance test results of various embodiments

[0083] Wear-resistant puncture Tear Cutting Sagging Example 1 Level 4 Level 1 Level 1 X Tear-shaped accumulation Example 2 Level 4 Level 1 Level 1 X Slight accumulation at the bottom Example 3 Level 4 Level 1 Level 1 X Basically no sagging Example 4 Level 4 Level 1 Level 1 X No sag Example 5 Level 4 Level 1 Level 1 X No sag Example 6 Level 4 Level 1 Level 1 X No sag

[0084] It can be seen from the above experimental data that the treatment method provided by the present invention can effectively improve the anti-sagging performance of the long-tube chemical protective gloves, and at the same time, the modified waste clay composite has no effect on the mechanical properties of the long-tube chemical protective gloves.

[0085] The waste clay in the present invention is an industrial solid waste, which requires factories to use a certain cost to properly treat. This process not only increases costs but also cannot directly create profits. The industrial waste clay is modified to have a certain utilization value, and the problem of latex sagging process of gloves can be solved at the same time.

[0086] Industrial waste clay absorbs a large amount of oil and other organic matter. Through high-temperature calcination of the waste clay before treatment, the oil and other organic matter are removed to restore its activity to a certain extent. At the same time, the porous structure is opened for modification. The calcined waste clay is post-treated with casein, and the treated colloid is the anti-sagging agent.

[0087] Waste clay has a large specific surface area and surface energy, and can form an effective physical barrier in latex, hindering the free flow of latex on the vertical surface, thereby reducing the sagging phenomenon. The addition of modified waste clay complex, namely waste clay-casein complex, will increase the volume and viscosity of the latex, so that the latex can better adhere to the substrate during the construction process and is not easy to flow.

[0088] The anti-sagging agent waste clay-casein complex has good suspension properties, can be evenly dispersed in latex and maintain long-term stability, prevent latex stratification and precipitation, thereby maintaining the uniformity and consistency of the latex and reducing the risk of sagging.

[0089] The waste clay-casein complex has certain charges and polar groups, which can absorb polar molecules and ions in latex to form a stable colloidal structure. This colloidal structure plays a role similar to a thixotropic agent in latex, which can reduce viscosity under shear force and restore viscosity under static state, which helps to control the fluidity of latex and prevent sagging.

[0090] Waste clay itself does not directly participate in the chemical reaction of latex, but the active groups on its surface may interact with the components in the latex, such as forming hydrogen bonds or van der Waals forces, further enhancing the cohesion and adhesion of the latex and reducing sagging.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a long-tube chemical-resistant glove based on a modified waste clay composite, characterized in that: The steps include: S1, calcining the purchased industrial waste clay in a muffle furnace at high temperature, cooling it to room temperature, collecting it in bags, and drying and storing it for later use; S2, taking the dried waste clay and crushing it with a crusher, and then stirring and dispersing it with a dispersion liquid to form a suspension, and finally adding casein, stirring and putting it into a ball mill for ball milling to obtain a modified waste clay composite; S3, adding the modified waste clay composite to the raw material and mixing and stirring to prepare an impregnated latex; S4, taking the glove core and putting it on the hand mold for preheating; S5, dipping the preheated glove core into a coagulant; S6, performing pre-vulcanization and high temperature vulcanization treatment in sequence; S7, demoulding to obtain the long tube chemical resistant gloves.

2. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The calcination temperature of the industrial waste clay in S1 is 800-1200° C., and the calcination time is 1-3 hours.

3. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The dispersion in S2 is a KOH solution with a mass fraction of 5%, the solid-liquid ratio of the waste clay to the dispersion is 1:5, the stirring time is 5-10h, and the stirring temperature is 10-40°C.

4. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The amount of casein added to the S2 is 5% of the weight of the suspension, the stirring time is 1-3 hours, the spheroidal graphite time is 72-96 hours, and the modified waste clay composite is in a colloidal state.

5. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The impregnated latex in S3 includes the following raw materials by weight: 80-100 parts of nitrile latex, 0.8-1 parts of KOH, 1-3 parts of sulfur, 2-3 parts of zinc oxide, 1-3 parts of accelerator ZDEC, 1-2 parts of surfactant, 1-5 parts of modified waste clay composite, and 1-2 parts of black pigment.

6. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 5, characterized in that: The surfactant is selected from sodium dodecylbenzene sulfonate or sodium dodecyl sulfate.

7. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The preheating temperature in S4 is 60-80°C.

8. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The methanol solution of acetic acid, a coagulant in S5, has a mass fraction of 1-6%.

9. The method for preparing a long-tube chemical-resistant gloves based on a modified waste clay composite according to claim 1, characterized in that: The pre-vulcanization temperature in S6 is 60-90°C, and the high temperature vulcanization temperature is 105-110°C.