CN115873277B - Preparation method of self-repairing latex labor protection gloves - Google Patents
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Abstract
The invention discloses a preparation method of self-repairing latex labor protection gloves, which is characterized by comprising the following steps: (1) preparation of modified dipping latex; (2) The glove cores are selected to be sleeved on the hand molds, and the glove cores are preheated in an oven at 50-90 ℃ for 15-35 min; (3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature; (4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition; (5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature; (6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 10-30min at 55-75 ℃; (7) After the pre-vulcanization treatment is finished, washing with water at 30-65 ℃ for 20-50min, vulcanizing at 80-130 ℃ for 40-90min after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove. The invention has the advantages that the latex labor protection glove can be repaired in time after being cut or worn, and the service life of the glove is prolonged.
Description
Technical Field
The invention relates to the technical field of functional composite materials, in particular to a preparation method of self-repairing latex labor protection gloves.
Background
In recent years, along with the rapid development of macroscopic economy in China, the rapid development of urbanization is realized. The scale of labor protection articles is also gradually enlarged, and the importance is gradually increased. The latex labor protection glove is used as an important component of labor protection articles, is comfortable to wear after special surface treatment, is different from common gloves, can be used in industries such as families, industry, medical treatment, cosmetology and the like, and is a necessary hand protection article. However, after the labor intensity of the existing latex labor protection gloves is high, holes are always formed locally, so that the latex labor protection gloves are scrapped.
Compared with common rubber gloves, the latex labor protection gloves belong to high-grade products and have relatively high price. Once damaged (such as cutting), the common latex glove loses the protective effect and needs to be discarded, which is a waste of resources and is not economical. At present, the self-repairing preparation of repairable materials by utilizing unsaturated groups and conjugated diene on furan derivatives under ultraviolet light is widely focused in recent years, but no report related to repairable latex labor protection gloves exists.
Disclosure of Invention
The invention aims to provide a self-repairing latex labor protection glove which can be repaired in time after being cut or worn, and the service life of the glove is prolonged.
The technical aim of the invention is realized by the following technical scheme:
the preparation method of the self-repairing latex labor protection glove is characterized by comprising the following steps of:
(1) Preparing modified dipping latex;
(2) The glove cores are selected to be sleeved on the hand molds, and the glove cores are preheated in an oven at 50-90 ℃ for 15-35 min;
(3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 10-30min at 55-75 ℃;
(7) After the pre-vulcanization treatment is finished, washing with water at 30-65 ℃ for 20-50min, vulcanizing at 80-130 ℃ for 40-90min after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
Preferably, the modified dipping latex in the step (1) comprises the following components in parts by mass: 70-80 parts of natural latex, 10-20 parts of kaolin, 2-5 parts of potassium hydroxide, 1-2 parts of titanium pigment, 3-6 parts of vulcanizing agent, 2.5 parts of zinc oxide, 3-5 parts of foaming agent potassium octadecenoate, 8-12 parts of furan derivative, 1-2 parts of hindered phenol antioxidant, 3-5 parts of thickener and the preparation process of modified impregnating latex comprises the following steps: adding kaolin, potassium hydroxide, a vulcanizing agent, zinc oxide, a foaming agent, titanium white, a hindered phenol anti-aging agent and a thickening agent into a natural latex solution, uniformly mixing, slowly adding a furan derivative in a stirring state, and stirring for 3-6 hours at room temperature to obtain the modified dipping latex.
Preferably, the solid content of the natural latex is 40-65%, and the mass percentage of ammonia is 0.65% -0.75%.
Preferably, the vulcanizing agent is one or more combinations of sulfur and 2,2' -methylenebis (4-methyl-6-tert-butylphenol).
Preferably, the thickener is one or more of sodium polyacrylate, cellulose and casein.
Preferably, the furan derivative comprises one or more of 2, 5-furandimethanol and trifuranyl glycol.
Preferably, the hindered phenol antioxidant is one of 2,2' -methylenebis (4-methyl-6-tert-butylphenol) or 2, 6-di-tert-butyl-4-methylphenol.
Preferably, the solidifying agent in (3) is a solution prepared by dissolving calcium chloride or calcium nitrate in methanol, ethanol or water, and the solidifying agent is a solution prepared by dissolving calcium chloride or calcium nitrate in methanol, ethanol or water.
Preferably, the tattooing agent in (5) is a solution prepared by dissolving xylene or glacial acetic acid in ethanol, and the tattooing agent is a solution prepared by dissolving xylene or glacial acetic acid in ethanol.
Preferably, the glove core material in the step (2) is one or a combination of more of spandex, terylene, glass fiber, TC yarn and steel wire.
In summary, the beneficial effects of the invention are as follows: firstly, the furan derivative is added into the dipping latex, so that the furan derivative is uniformly dispersed in the dipping latex, oxidation can be avoided, and the self-repairing property of the furan derivative is ensured. And secondly, the furan derivative can enable the latex labor protection glove to undergo an addition reaction under ultraviolet light through a vinyl group on a natural latex molecular chain and conjugated diene on the furan derivative under the condition of breakage after high-intensity labor, so that a crosslinking reinforced network is formed, the tensile strength of the latex can be improved, cracks in the latex can be spontaneously filled, the crosslinking reinforced network forms a buffer for the latex in a unit area which is being broken, and finally, the latex network repair and the structural integrity self-repair are realized. Finally, an anti-slip layer is formed by a method of dipping furan derivative mucilage after latex is dried, the friction force of the glove is greatly improved, the operation is more flexible, the wear resistance is better after the latex is added, and the insulation performance is better.
Detailed Description
The principles and features of the present invention are described below in connection with the following examples which are provided for the purpose of illustrating the invention and are not intended to limit the scope of the invention. The invention is more specifically described by way of example in the following paragraphs. Advantages and features of the invention will become more apparent from the following description and from the claims.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
The modified impregnating emulsion comprises the following components in parts by mass: 65 parts of natural latex (ammonia content 0.7 percent, solid content 50 percent); 15 parts of kaolin; 3.5 parts of potassium hydroxide; 1.5 parts of titanium dioxide; 4 parts of sulfur; 2.5 parts of zinc oxide; 4 parts of potassium octadecenoate; 4 parts of sodium polyacrylate; 1.5 parts of 2,2' -methylenebis (4-methyl-6-tert-butylphenol); 9.75 parts of 2, 5-furandimethanol.
Coagulant: 10% calcium nitrate in methanol.
And (3) a texture forming agent: 5% acetic acid ethanol solution.
A preparation method of self-repairing latex gloves comprises the following steps:
(1) Preparing modified dipping latex, namely adding kaolin, potassium hydroxide, titanium pigment, sulfur, zinc oxide, potassium octadecenoate, sodium polyacrylate and 2,2' -methylenebis (4-methyl-6-tertiary butyl phenol) into natural latex, uniformly mixing, slowly adding 2, 5-furandimethanol in a stirring state, and stirring for 5 hours at room temperature to obtain modified dipping latex;
(2) A spandex glove core is selected to be sleeved on a hand mould, and is preheated in an oven at 50-90 ℃ for 15-35 min;
(3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 10min at 55 ℃;
(7) After the pre-vulcanization treatment is finished, washing for 20min at 30 ℃, vulcanizing for 40min at 80 ℃ after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
Example 2
The modified impregnating emulsion comprises the following components in parts by mass: 65 parts of natural latex (ammonia content 0.7 percent, solid content 50 percent); 15 parts of kaolin; 3.5 parts of potassium hydroxide; 1.5 parts of titanium dioxide; 4 parts of 2,2' -methylenebis (4-methyl-6-tert-butylphenol); 2.5 parts of zinc oxide; 4 parts of potassium octadecenoate; 4 parts of cellulose; 1.5 parts of 2, 6-di-tert-butyl-4-methylphenol; 9.75 parts of trifuranyl dihydric alcohol.
Coagulant: 10% calcium chloride in methanol.
And (3) a texture forming agent: 5% xylene ethanol solution.
A preparation method of self-repairing latex gloves comprises the following steps:
(1) Preparing modified dipping latex, namely adding kaolin, potassium hydroxide, titanium pigment, 2' -methylenebis (4-methyl-6-tertiary butyl phenol), zinc oxide, potassium octadecenoate, cellulose and 2, 6-di-tertiary butyl-4-methylphenol into a natural latex solution, uniformly mixing, slowly adding trifuranyl dihydric alcohol in a stirring state, and stirring for 5 hours at room temperature to obtain modified dipping latex;
(2) Selecting a terylene glove core to be sleeved on a hand mould, and preheating the glove core in an oven at 70 ℃ for 25min;
(3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 20min at 60 ℃;
(7) After the pre-vulcanization treatment is finished, washing for 40min at 45 ℃, vulcanizing for 65min at 110 ℃ after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
Example 3
The natural impregnating latex comprises the following raw materials in parts by mass: 80 parts of natural latex (ammonia content 0.75 percent, solid content 40 percent); 10 parts of kaolin; 2 parts of potassium hydroxide; 2 parts of titanium dioxide; 3 parts of sulfur; 2.5 parts of zinc oxide; 3 parts of potassium octadecenoate; 3 parts of sodium polyacrylate; 1 part of 2,2' -methylenebis (4-methyl-6-tert-butylphenol); 9.75 parts of 2, 5-furandimethanol.
Coagulant: 1.5% calcium nitrate in methanol.
And (3) a texture forming agent: 10% acetic acid ethanol solution.
A preparation method of self-repairing latex gloves comprises the following steps:
(1) Preparing modified dipping latex, namely adding kaolin, potassium hydroxide, titanium white, sulfur, zinc oxide, potassium octadecenoate, sodium polyacrylate and 2,2' -methylenebis (4-methyl-6-tert-butylphenol) into a natural latex solution, uniformly mixing, slowly adding 2, 5-furandimethanol in a stirring state, and stirring for 5 hours at room temperature to obtain modified natural dipping latex;
(2) A spandex glove core is selected to be sleeved on a hand mould, and is preheated in an oven at 70 ℃ for 25min;
(3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 20min at 60 ℃;
(7) After the pre-vulcanization treatment is finished, washing for 40min at 45 ℃, vulcanizing for 65min at 110 ℃ after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
Example 4
The natural impregnating latex comprises the following components in parts by mass: 70 parts of natural latex (ammonia content 0.65 percent, solid content 65 percent); 20 parts of kaolin; 5 parts of potassium hydroxide; 1 part of titanium dioxide; 6 parts of sulfur; 2.5 parts of zinc oxide; 5 parts of potassium octadecenoate; sodium polyacrylate 5 parts, 2 parts of 2,2' -methylenebis (4-methyl-6-tert-butylphenol); 9.75 parts of 2, 5-furandimethanol.
Coagulant: 20% calcium nitrate in methanol.
And (3) a texture forming agent: 2% acetic acid ethanol solution.
A preparation method of self-repairing latex gloves comprises the following steps:
(1) Preparing modified dipping latex, namely adding kaolin, potassium hydroxide, titanium white, sulfur, zinc oxide, potassium octadecenoate, sodium polyacrylate and 2,2' -methylenebis (4-methyl-6-tert-butylphenol) into a natural latex solution, uniformly mixing, slowly adding 2, 5-furandimethanol in a stirring state, and stirring for 5 hours at room temperature to obtain modified natural dipping latex;
(2) Selecting a terylene glove core to be sleeved on a hand mould, and preheating the terylene glove core in an oven at 90 ℃ for 35min;
(3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 30min at 75 ℃;
(7) And after the pre-vulcanization treatment is finished, washing for 50min at 65 ℃, vulcanizing for 90min at 130 ℃ after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
Comparative example 1
The impregnating emulsion comprises the following components in parts by mass: 65 parts of natural latex (ammonia content 0.7 percent, solid content 50 percent); 15 parts of kaolin: 3.5 parts of potassium hydroxide; 1.5 parts of titanium dioxide; 4 parts of sulfur; 2.5 parts of zinc oxide; 4 parts of potassium octadecenoate; sodium polyacrylate 4 parts, 2' -methylenebis (4-methyl-6-tert-butylphenol) 1.5 parts.
Coagulant: 10% calcium nitrate in methanol.
And (3) a texture forming agent: 5% acetic acid aqueous solution.
A preparation method of latex gloves comprises the following steps:
(1) Preparing modified dipping latex; adding natural latex into the nitrile latex solution, mixing uniformly, namely kaolin, potassium hydroxide, titanium pigment, sulfur, zinc oxide, potassium octadecenoic acid, sodium polyacrylate and 2,2' -methylenebis (4-methyl-6-tert-butylphenol), and stirring for 5 hours at room temperature to obtain the modified natural dipping latex.
(2) Selecting a glove core to be sleeved on the hand mould, and preheating the glove core in an oven at 70 ℃ for 20min;
(3) Immersing the terylene glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 20min at 60 ℃;
(7) After the pre-vulcanization treatment is finished, washing for 40min at 45 ℃, vulcanizing for 65min at 110 ℃ after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
The self-repairing latex labor gloves prepared and demolded in the above examples 1 to 4 and comparative example 1 were subjected to self-repairing performance test, and the self-repairing performance test steps in the present invention are: the glove is cut off evenly along the middle finger part of the glove, the sections are butted, and after the glove is placed under an ultraviolet lamp for 12 hours, the abrasion resistance, the cutting resistance, the tearing resistance and the puncture resistance are tested according to the GB24541-2019 standard, and the specific properties are shown in the table 1.
Table 1 self-healing Performance test data for the preparation of release gloves for each example and comparative example
The performance prepared in the embodiment 1 of the invention is optimized by various factors, the comprehensive performance is optimal, the product is directly scrapped after the cutting of the comparative example 1, and the abrasion resistance, the cutting resistance, the tearing resistance and the puncture resistance of the embodiments 1, 2, 3 and 4 after the cutting self-repairing are recovered to more than 85 percent of the original values.
According to the invention, the furan derivative is added into the dipped latex, so that the automatic repair of the broken part of the glove is realized by self-repairing the vinyl group on the natural latex molecular chain and the conjugated diene on the furan derivative under ultraviolet light under the condition that the latex labor protection glove is damaged after high-intensity labor, the process is simple, practical and environment-friendly, the service life of the glove is effectively prolonged, and the waste is reduced.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention, and those skilled in the art may make various modifications and equivalents within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the technical solution of the present invention.
Claims (9)
1. The preparation method of the self-repairing latex labor protection glove is characterized by comprising the following steps of:
(1) Adding kaolin, potassium hydroxide, a vulcanizing agent, zinc oxide, a foaming agent, titanium white, a hindered phenol anti-aging agent and a thickening agent into a natural latex solution, uniformly mixing, slowly adding a furan derivative in a stirring state, and stirring at room temperature for 3-6 hours to obtain modified dipping latex, wherein the furan derivative comprises one or more of 2, 5-furandimethanol and trifuranyl dihydric alcohol;
(2) The glove cores are selected to be sleeved on the hand molds, and the glove cores are preheated in an oven at 50-90 ℃ for 15-35 min;
(3) Immersing the glove core into a prefabricated coagulant, and homogenizing and coagulating for 60s at room temperature;
(4) Immersing the glove core into the modified dipping latex prepared in the step (1), and repeating the sizing for 30s twice under the room temperature condition;
(5) Immersing the glove core into a prefabricated texture agent, and repeating the spin coating for 90s twice at room temperature;
(6) After the rubber surface of the surface layer of the glove core is molded, performing pre-vulcanization treatment for 10-30min at 55-75 ℃;
(7) After the pre-vulcanization treatment is finished, washing with water at 30-65 ℃ for 20-50min, vulcanizing at 80-130 ℃ for 40-90min after the completion of the pre-vulcanization treatment, and demolding to obtain the self-repairing latex labor protection glove.
2. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the modified dipping latex in the step (1) comprises the following components in parts by mass: 70-80 parts of natural latex, 10-20 parts of kaolin, 2-5 parts of potassium hydroxide, 1-2 parts of titanium dioxide, 3-6 parts of vulcanizing agent, 2.5 parts of zinc oxide, 3-5 parts of foaming agent potassium octadecenoate, 8-12 parts of furan derivative, 1-2 parts of hindered phenol antioxidant and 3-5 parts of thickener.
3. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the natural latex has a solid content of 40-65% and an ammonia mass percentage of 0.65% -0.75%.
4. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the vulcanizing agent is one or more of sulfur and 2,2' -methylenebis (4-methyl-6-tertiary butyl phenol).
5. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the thickener is one or more of sodium polyacrylate, cellulose and casein.
6. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the hindered phenol antioxidant is one of 2,2' -methylenebis (4-methyl-6-tertiary butyl phenol) or 2, 6-di-tertiary butyl-4-methylphenol.
7. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the solidifying agent in the step (3) is a solution prepared by dissolving calcium chloride or calcium nitrate in methanol, ethanol or water, wherein the mass fraction of the calcium chloride or the calcium nitrate is 1.5-20%.
8. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the grain forming agent in the step (5) is a solution prepared by dissolving dimethylbenzene or glacial acetic acid in ethanol, and the mass fraction of dimethylbenzene or glacial acetic acid is 2% -10%.
9. The method for preparing the self-repairing latex labor protection glove according to claim 1, which is characterized in that: the glove core material in the step (2) is one or a combination of more of spandex, terylene, glass fiber, TC yarn and steel wire.
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