CN111745876A - Preparation method of waterproof and anti-seepage latex gloves - Google Patents
Preparation method of waterproof and anti-seepage latex gloves Download PDFInfo
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- CN111745876A CN111745876A CN202010644402.0A CN202010644402A CN111745876A CN 111745876 A CN111745876 A CN 111745876A CN 202010644402 A CN202010644402 A CN 202010644402A CN 111745876 A CN111745876 A CN 111745876A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/14—Dipping a core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/20—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. moulding inserts or for coating articles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
- C08L7/02—Latex
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
- B29L2031/4842—Outerwear
- B29L2031/4864—Gloves
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Gloves (AREA)
Abstract
The invention provides a preparation method of waterproof and anti-seepage latex gloves, which comprises the following steps; (1) soaking in hot water; (2) soaking a coagulant; (3) drying; (4) latex dipping; (5) leaching; (6) secondary latex dipping; (7) drying; (8) curling; (9) demolding; (10) film covering; (11) detecting and repairing; (12) loading; (13) vulcanizing; (14) water treatment for 30-60 min; (15) checking air tightness; (16) and (5) drying. Compared with the prior art, the invention has the beneficial effects that the permeability coefficient, the air tightness, the mechanical property, the hot air aging resistance, the sulfuric acid solution resistance and the sodium hydroxide solution resistance are all excellent, and the requirements of related units can be met. The invention particularly provides a method for manufacturing the latex gloves which are waterproof and have chemical penetration, are soft, are matched with the hand curves in shape and are convenient and comfortable to wear.
Description
Technical Field
The application relates to a waterproof, airtight and chemical-resistant glove, belongs to the field of rubber gloves, and particularly relates to a preparation method of a latex glove.
Background
The original industrial or work gloves, mostly made of leather, such as pigskin or cowhide, are hard, not conducive to bending of the fingers of the worker, and are used in places where finger flexibility is required.
With the great development of manufacturing processes and materials, particularly the development of rubber and composite materials, more and more new varieties are discovered. Industrial or work gloves can be classified into rubber, steel wire, leather-textured, and knitted-wire work gloves according to the material of the gloves. The rubber gloves have the advantages of corrosion resistance, insulation and method; the leather gloves are wear-resistant and scald-proof, so that the leather gloves are generally used for the loading and unloading processes of light workers, and the knitted gloves are also the most common ones and are mainly used in the industries of environmental sanitation buildings and the like.
The butyl rubber is an important synthetic rubber, has the characteristics of heat resistance, low temperature resistance, high air tightness and the like, and the butyl latex retains the characteristics of the butyl rubber and is easy to be matched with other latex for use. The mole fraction of isoprene contained in the molecular structure of the rubber in the butyl latex is 1.5% -2%, the unsaturation degree in the molecule is extremely low, and the chemical inertia is high, so that the mechanical stability and the low-temperature stability are both excellent. Has good compatibility with other latex and natural latex, styrene-butadiene latex, neoprene latex, nitrile latex, etc. Fillers and colorants are readily dispersed in the gum.
The butyl rubber dairy product has good aging resistance, ozone resistance, weather resistance and chemical resistance, and the butyl rubber film has good air tightness, but low tearing strength and tensile strength. The rubber can be used as dipped products such as gas-tight gloves and other gas-tight products, can be used for preparing cord thread gumming, protective clothing, anticorrosive coatings, packaging coatings, non-woven fabrics, gas-tight gloves and the like by adopting dipping and coating processes, and can also be widely applied to the manufacture of gloves, rubber tubes, medical rubber plugs, tire gas-tight layers and adhesive products.
The properties of butyl latex also greatly affect the performance of the glove. The existing rubber gloves are not ideal in air permeability, protective performance and corrosion resistance, and cannot meet the labor protection requirements in special fields. However, butyl latex is unstable, difficult to form a film, difficult to process, poor in film forming stability and other process problems, the existing traditional processing process and equipment are difficult to meet the requirements of glove product performance, the application of butyl latex is less, and in order to overcome the problems, the excellent performance of butyl latex is more widely applied. In conclusion, the invention adopts the technical means of butyl latex or the combination of butyl latex and other latex to improve the original production process and make up the defects of the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a process for preparing gloves by taking butyl latex as a main polymer material.
The waterproof and impermeable latex gloves of the invention have stricter requirements on production process parameters. Dipping latex for three times, drying at low temperature, wherein the dipping temperature and the drying temperature need to be strictly controlled, if the hot water temperature is not proper, the defects of hot water bubbles and the like can be easily caused on the surface of the rubber film, and if the drying temperature is over-temperature, obvious high-temperature bubbles which cannot be repaired can be left on the surface of the glove.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of waterproof and anti-seepage latex gloves comprises the following steps:
(1) soaking in hot water: preheating a production model of the glove in water with the temperature of 60-80 ℃ for 60-80 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant;
(3) and (3) drying: the production model is dried after being soaked in the coagulant;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking in hot water of 50-60 deg.C for 30-120 min;
(6) secondary latex dipping: dipping the production model in latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at the drying temperature of 50-100 ℃ for 60-180 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at the temperature of 100 ℃ and 150 ℃ for 50-180 minutes;
(14) water treatment: after the glove is vulcanized, washing the glove with water at the temperature of 60-75 ℃ for 30-60 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at 70-90 ℃.
Preferably, the drying temperature of the step (3) is 55-80 ℃, and the drying time is 20-80 minutes.
Preferably, the composite latex adopted in the step (4) is prepared from the following raw materials in parts by weight: 30-100 parts of mixed latex of natural latex and butyl latex, 0.1-5 parts of potassium hydroxide and 1-30 parts of dispersoid.
Preferably, the mixed latex of the natural latex and the butyl latex is prepared from the following latices in mass ratio: natural latex/butyl latex 90-10/10-90.
Preferably, the dispersion is prepared from the following raw materials in parts by mass: casein: 0.5-10; sulfur: 0.5 to 4; accelerator (b): 0.5 to 5,; zinc oxide: 0.5 to 8; an anti-aging agent: 0.1 to 5; pigment: 0 to 1; 0.1-1 part of potassium hydroxide; water glass: 0 to 1; thickening agent: 0 to 10; inorganic filler: 0 to 30; sodium carboxymethylcellulose: 0-1 part of water and 10-50 parts of water.
Preferably, the coagulant in the step (2) is a calcium chloride solution, and the calcium chloride solution is prepared from 20-25 parts of calcium chloride and 100 parts of water.
The processing method of the invention is suitable for preparing butyl latex gloves, the processing technology of the prior art is not suitable for producing butyl latex, and the butyl latex gloves produced have better performance due to the selection of various conditions in the invention. The natural latex and the butyl latex are used according to a certain proportion, so that the using effect is better.
Compared with the prior art, the glove manufactured by adopting the process has the following beneficial effects:
1. airtightness: no air leakage is generated under the pressure of 12kPa +/-1 kPa for 10-15 seconds;
2. mechanical properties: the tensile strength of the glove is more than or equal to 12 MPa; the elongation at break is more than or equal to 500 percent;
3. hot air aging resistance: under the conditions of 70 ℃ and 72h of aging time, the glove rubber surface is not sticky, delaminated and cracked, and the tensile strength is not less than 11 MPa;
4. sulfuric acid solution resistance: after the glove is soaked in a sulfuric acid solution with the temperature of 70 ℃ and the concentration of 68% for 10 hours, the glove rubber surface is not sticky, delaminated and cracked, and the tensile strength is not less than 11 MPa;
5. sodium hydroxide solution resistance: after the glove is soaked in 40 percent sodium hydroxide solution at the temperature of 70 ℃ for 10 hours, the glove rubber surface is not sticky, delaminated and cracked, and the tensile strength is not less than 11 MPa.
Detailed Description
Example 1
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: mixed latex 100 of natural latex and butyl latex, potassium hydroxide 5, dispersion 30.
The mixed latex is composed of the following raw materials in parts by mass: natural latex/butyl latex 90/10;
the dispersion is prepared from the following raw materials in percentage by mass: casein: 0.5; sulfur: 4; accelerator (b): 0.5; zinc oxide: 0.5; an anti-aging agent: 0.1; 0.1 part of potassium hydroxide; water glass: 1; thickening agent: 10; and (3) water 50.
A waterproof and anti-seepage latex glove is prepared by the following steps:
(1) soaking in hot water: preheating a production model of the glove in water at 60 ℃ for 60 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant; the coagulant is a calcium chloride solution made from 25 parts of calcium chloride and 100 parts of water.
(3) And (3) drying: the produced model is soaked in a coagulant and then dried at 55 ℃ for 20 minutes;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking in hot water at 60 deg.C for 30 min;
(6) secondary latex dipping: dipping the production model in the composite latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at 100 ℃ for 60 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at 150 ℃ for 50 minutes;
(14) water treatment: after the glove is vulcanized, washing the glove with water at 75 ℃ for 30 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at a temperature of 70 ℃.
Example 2
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: mixed latex 100 of natural latex and butyl latex, potassium hydroxide 0.1, dispersion 1.
The mixed latex is composed of the following raw materials in parts by mass: natural latex/butyl latex 10/90;
the dispersion is prepared from the following raw materials in percentage by mass: casein: 10; sulfur: 0.5; accelerator (b): 5,; zinc oxide: 8; an anti-aging agent: 5; pigment: 1; 1 part of potassium hydroxide; inorganic filler: 30, of a nitrogen-containing gas; sodium carboxymethylcellulose: 1, water 10.
A waterproof and anti-seepage latex glove is prepared by the following steps:
(1) soaking in hot water: preheating a production model of the glove in water at 80 ℃ for 80 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant; the coagulant is a calcium chloride solution, and the calcium chloride solution is prepared from 20 parts of calcium chloride and 100 parts of water.
(3) And (3) drying: the produced model is soaked in a coagulant and then dried at 80 ℃, and the drying time is 80 minutes;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking in hot water at 50 deg.C for 120 min;
(6) secondary latex dipping: dipping the production model in the composite latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at 50 ℃ for 180 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at 150 ℃ for 50 minutes;
(14) water treatment: after the gloves are vulcanized, washing the gloves with water at 60 ℃ for 60 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at 90 ℃.
Example 3
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: mixed latex 60 of natural latex and butyl latex, potassium hydroxide 2, dispersion 15.
The mixed latex is composed of the following raw materials in parts by mass: natural latex/butyl latex 40/40;
the dispersion is prepared from the following raw materials in percentage by mass: casein: 4; sulfur: 2; accelerator (b): 0.5,; zinc oxide: 4; an anti-aging agent: 0.1; pigment: 1; 0.5 of potassium hydroxide; water glass: 0.9; thickening agent: 1; inorganic filler: 15; sodium carboxymethylcellulose: 0.5 and 30 parts of water.
A waterproof and anti-seepage latex glove is prepared by the following steps:
(1) soaking in hot water: preheating a production model of the glove in water at 70 ℃ for 70 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant; the coagulant is a calcium chloride solution made from 24 parts of calcium chloride and 100 parts of water.
(3) And (3) drying: the produced model is soaked in a coagulant and then dried at 60 ℃, and the drying time is 60 minutes;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking the latex in hot water at 55 ℃ for 60 minutes;
(6) secondary latex dipping: dipping the production model in the composite latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at 70 ℃ for 60 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at 120 ℃ for 120 minutes;
(14) water treatment: after the glove is vulcanized, washing the glove with water at 70 ℃ for 40 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at 80 ℃.
Example 4
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: mixed latex of natural latex and butyl latex 80, potassium hydroxide 4, dispersion 20.
The mixed latex is composed of the following raw materials in parts by mass: natural latex/butyl latex 30/80;
the dispersion is prepared from the following raw materials in percentage by mass: casein: 8; sulfur: 3; accelerator (b): 4,; zinc oxide: 2; an anti-aging agent: 2; pigment: 0.5; 0.6 of potassium hydroxide; water glass: 0.2; thickening agent: 4; inorganic filler: 20; sodium carboxymethylcellulose: 0.5 and 30 parts of water.
A waterproof and anti-seepage latex glove is prepared by the following steps:
(1) soaking in hot water: preheating a production model of the glove in water at 65 ℃ for 75 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant; the coagulant is a calcium chloride solution made from 21 parts of calcium chloride and 100 parts of water.
(3) And (3) drying: soaking the produced model with coagulant, and drying at 65 ℃ for 70 minutes;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking the latex in hot water at 55 ℃ for 100 minutes;
(6) secondary latex dipping: dipping the production model in the composite latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at the drying temperature of 80 ℃ for 70 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at 120 ℃ for 100 minutes;
(14) water treatment: after the gloves are vulcanized, washing the gloves with water at 60 ℃ for 30 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at 85 ℃.
Example 5
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: mixed latex 50 of natural latex and butyl latex, potassium hydroxide 4, dispersion 10.
The mixed latex is composed of the following raw materials in parts by mass: natural latex/butyl latex 80/20;
the dispersion is prepared from the following raw materials in percentage by mass: casein: 4; sulfur: 1.5; accelerator (b): 3.5,; zinc oxide: 2; an anti-aging agent: 2; pigment: 0.4; 0.2 parts of potassium hydroxide; water glass: 0.6; thickening agent: 3; inorganic filler: 25; sodium carboxymethylcellulose: 0.2 and 40 parts of water.
A waterproof and anti-seepage latex glove is prepared by the following steps:
(1) soaking in hot water: preheating a production model of the glove in water at 75 ℃ for 65 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant; the coagulant is calcium chloride solution and is prepared from 22 parts of calcium chloride and 100 parts of water.
(3) And (3) drying: soaking the produced model with coagulant, and drying at 65 ℃ for 70 minutes;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking the latex in hot water at 55 ℃ for 80 minutes;
(6) secondary latex dipping: dipping the production model in the composite latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at 90 ℃ for 75 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at 130 ℃ for 50 minutes;
(14) water treatment: after the gloves are vulcanized, washing the gloves with water at 60 ℃ for 80 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at 85 ℃.
Comparative example 1
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: natural latex 80
The dispersion is prepared from the following raw materials in percentage by mass: casein: 8; sulfur: 3; accelerator (b): 4; zinc oxide: 2; an anti-aging agent: 2; pigment: 0.5; 0.6 of potassium hydroxide; water glass: 0.2; thickening agent: 4; inorganic filler: 20; sodium carboxymethylcellulose: 0.5 and 30 parts of water.
The preparation was carried out according to the procedure of example 4 of the present invention.
Comparative example 2
The waterproof and impermeable latex glove is prepared from the following raw materials in parts by mass: butyl latex 80
The dispersion is prepared from the following raw materials in percentage by mass: casein: 8; sulfur: 3; accelerator (b): 4; zinc oxide: 2; an anti-aging agent: 2; pigment: 0.5; 0.6 of potassium hydroxide; water glass: 0.2; thickening agent: 4; inorganic filler: 20; sodium carboxymethylcellulose: 0.5 and 30 parts of water.
The preparation was carried out according to the procedure of example 4 of the present invention.
Comparative example 3
1) Configuration: a mixed latex was prepared according to the formulation of example 4
2) And (3) vulcanization: stirring the prepared mixed latex, and sequentially adding casein: 8; sulfur: 3; accelerator (b): 4,; zinc oxide: 2; an anti-aging agent: 2; pigment: 0.5; 0.6 of potassium hydroxide; water glass: 0.2; thickening agent: 4; inorganic filler: 20; sodium carboxymethylcellulose: 0.5, vulcanization is carried out with water 30, temperature: 20-50 ℃, time: 24-48 hours;
3) refining: after the process requirements are obtained in the step 2), defoaming, color mixing, gloss regulating, temperature regulating, standing, curing and filtering are carried out for later use;
4) molding: the glove model is firstly cleaned by soaking in acid and alkali clean water, the cleaned hand model is soaked in hot water at the temperature of 80-95 ℃ for heating, then soaked in a coagulant and dried, and then soaked in glue, and the soaked hand model enters a vulcanizing tank for drying, vulcanizing, molding and demolding;
5) after demolding, the gloves enter a drying box for sulfur supplement and shaping to obtain qualified synthetic gloves;
6) and (5) entering a testing and packaging workshop, testing, packaging and warehousing.
The physical and mechanical properties of the gloves prepared in examples 1-3 were measured and the results are shown in Table 1:
TABLE 1 Performance test Table
As can be seen from the table above, compared with comparative example 1, the air tightness of the gloves prepared by using butyl latex and natural latex in a compounding way is greatly improved, and the retention rate after hot air and acid-base treatment is obviously improved; compared with the comparative example 2, the gloves prepared by using the butyl latex and the natural latex in a composite way have the advantages that the tensile strength and the elongation at break by hand are obviously improved, and the retention rate is kept unchanged after airtight, hot air and acid-base treatment, namely the comprehensive physical property is improved; 3) example 4 shows the improvement in the airtightness of the glove, the retention of tensile strength after hot air aging, and the retention of tensile strength after acid and alkali treatment, compared with comparative example 3. Therefore, the formula and the preparation process of the invention can improve various performances of the latex gloves, and are more suitable for use.
Claims (6)
1. A preparation method of waterproof and anti-seepage latex gloves is characterized by comprising the following steps:
(1) soaking in hot water: preheating a production model of the glove in water with the temperature of 60-80 ℃ for 60-80 seconds;
(2) soaking a coagulant: preheating the production model and then soaking a coagulant;
(3) and (3) drying: the production model is dried after being soaked in the coagulant;
(4) latex dipping: dipping the production model in the composite latex;
(5) leaching: soaking in hot water of 50-60 deg.C for 30-120 min;
(6) secondary latex dipping: dipping the production model in the composite latex again;
(7) and (3) drying: drying the glue film in a long drying cabinet at the drying temperature of 50-100 ℃ for 60-180 minutes;
(8) edge curling: for convenience of wearing and safety, a side with the diameter of 5-10mm is rolled up from the cuff edge of the glove;
(9) demolding: removing the glove from the production model;
(10) film covering: sleeving the product on a vulcanization model with the same specification as the production model;
(11) detection and repair: carrying out appearance inspection on the product, finding out slight defects and repairing the defects;
(12) loading: loading the repaired semi-finished product on a vulcanizing vehicle for vulcanizing;
(13) and (3) vulcanization: vulcanizing the glove at the temperature of 100 ℃ and 150 ℃ for 50-180 minutes;
(14) water treatment: after the glove is vulcanized, washing the glove with water at the temperature of 60-75 ℃ for 30-60 minutes;
(15) and (3) checking air tightness: performing inflation inspection on the gloves, detecting whether the gloves leak air or not, and removing the gloves with air leakage;
(16) and (3) drying: the airtight gloves were dried in a drying drum until the gloves were completely dried at 70-90 ℃.
2. The method for preparing waterproof and impermeable latex gloves according to claim 1, wherein the drying temperature in step (3) is 55-80 ℃ and the drying time is 20-80 minutes.
3. The method for preparing the waterproof and impermeable latex gloves according to claim 1 is characterized in that the composite latex adopted in the step (4) is prepared from the following raw materials in parts by weight: 30-100 parts of mixed latex of natural latex and butyl latex, 0.1-5 parts of potassium hydroxide and 1-30 parts of dispersoid.
4. The method for preparing waterproof and impermeable latex gloves according to claim 3, wherein the mixed latex of the natural latex and the butyl latex is prepared from the following latex in parts by mass: natural latex/butyl latex 90-10/10-90.
5. The method for preparing the waterproof and impermeable latex glove according to claim 3, wherein the dispersion is prepared from the following raw materials in parts by mass: casein: 0.5-10; sulfur: 0.5 to 4; accelerator (b): 0.5 to 5,; zinc oxide: 0.5 to 8; an anti-aging agent: 0.1 to 5; pigment: 0 to 1; 0.1-1 part of potassium hydroxide; water glass: 0 to 1; thickening agent: 0 to 10; inorganic filler: 0 to 30; sodium carboxymethylcellulose: 0-1 part of water and 10-50 parts of water.
6. The method for preparing waterproof and impermeable latex gloves according to claim 1, wherein the coagulant in step (2) is calcium chloride solution, and the calcium chloride solution is prepared from 20-25 parts of calcium chloride and 100 parts of water.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861593A (en) * | 2021-11-19 | 2021-12-31 | 广州市栢盛新材料科技有限公司 | Disposable gloves |
| CN114248385A (en) * | 2021-12-15 | 2022-03-29 | 张家港思淇科技有限公司 | Production process of gum dipping gloves |
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| EP0378380A1 (en) * | 1989-01-11 | 1990-07-18 | Ortho Pharmaceutical (Canada) Ltd | Natural rubber latex film with improved tear resistance |
| JP2005082720A (en) * | 2003-09-09 | 2005-03-31 | Sumitomo Rubber Ind Ltd | Rubber latex composition and rubber product made thereof |
| CN101752019A (en) * | 2008-12-16 | 2010-06-23 | 西南科技大学 | Production for radiation protection gloves |
| CN109503963A (en) * | 2018-11-02 | 2019-03-22 | 广州双乳胶制品有限公司 | A kind of preparation method of butyl latex and preparation method thereof and the gloves with its preparation |
| CN111040206A (en) * | 2019-12-30 | 2020-04-21 | 南京润京乳胶制品有限公司 | Preparation method of medical gloves made of mixed latex |
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| EP0378380A1 (en) * | 1989-01-11 | 1990-07-18 | Ortho Pharmaceutical (Canada) Ltd | Natural rubber latex film with improved tear resistance |
| JP2005082720A (en) * | 2003-09-09 | 2005-03-31 | Sumitomo Rubber Ind Ltd | Rubber latex composition and rubber product made thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113861593A (en) * | 2021-11-19 | 2021-12-31 | 广州市栢盛新材料科技有限公司 | Disposable gloves |
| CN114248385A (en) * | 2021-12-15 | 2022-03-29 | 张家港思淇科技有限公司 | Production process of gum dipping gloves |
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