CN113480810A - Modified PVC composite glove and preparation method thereof - Google Patents
Modified PVC composite glove and preparation method thereof Download PDFInfo
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- CN113480810A CN113480810A CN202110628578.1A CN202110628578A CN113480810A CN 113480810 A CN113480810 A CN 113480810A CN 202110628578 A CN202110628578 A CN 202110628578A CN 113480810 A CN113480810 A CN 113480810A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/02—Direct processing of dispersions, e.g. latex, to articles
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D19/00—Gloves
- A41D19/0006—Gloves made of several layers of material
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D19/00—Gloves
- A41D19/0055—Plastic or rubber gloves
- A41D19/0058—Three-dimensional gloves
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/02—Copolymers with acrylonitrile
Abstract
The invention relates to a modified PVC composite glove which comprises the following raw materials in parts by weight: 100 parts of PVC paste resin, 30-50 parts of DOTP plasticizer, 10-15 parts of TBC, 5-10 parts of DOA, 2-5 parts of mixed elastomer, 10-30 parts of liquid nitrile rubber, 10-33 parts of viscosity reducer D8028, 1-2 parts of heat stabilizer and 1-2 parts of color paste. The invention also provides a preparation method of the modified PVC composite glove, the modified PVC composite glove obtained by the formula and the production method can solve the problems of poor paste fluidity, poor hand feeling and elasticity of finished gloves and the like in the manufacturing process of common PVC gloves, and the obtained modified PVC composite glove has the characteristics of low production cost and good hand feeling and elasticity.
Description
Technical Field
The invention relates to the technical field of disposable glove production, in particular to a modified PVC composite glove and a preparation method thereof.
Background
Disposable PVC gloves belong to emerging industries, originate in the United states, and at present, China has become the world's most prominent supply of PVC gloves. The main consumer groups of PVC gloves are concentrated in industrially developed countries such as America, Europe, Japan, etc. With the continuous improvement of domestic consumption level, especially since new crown epidemic outbreaks, public service industries such as banking industry, medical industry, catering industry and the like begin to pay more attention to the important function of wearing gloves, and the consumption of the gloves is in a rapid growth trend.
With the wider and wider use of the PVC gloves, the requirements of consumers on the hand feeling and elasticity of the PVC gloves are higher and higher. The elongation of the PVC gloves produced in the current market is 350 percent, the tensile strength is 11Mpa, and the elasticity is poor under the influence of the characteristics of PVC materials and plasticizers; the butyronitrile gloves have the advantages of good hand feeling and high elasticity, and in addition, the price of raw materials of the butyronitrile gloves is reduced, and the price of the butyronitrile gloves is also reduced, so that people tend to use the butyronitrile gloves more under the condition that the price of the butyronitrile gloves is not similar to that of the PVC gloves, and the market of the PVC gloves faces greater challenges. Therefore, obtaining the hand feeling and elasticity similar to butyronitrile gloves at the price of PVC gloves becomes a problem to be solved in the prior art.
Disclosure of Invention
The invention aims at the problems in the prior art, and one object of the invention is to provide a modified PVC composite glove which solves the problems of poor paste fluidity, poor hand feeling and elasticity of finished gloves and the like in the manufacturing process of common PVC gloves and has the characteristics of low production cost and good hand feeling and elasticity.
The invention also aims to provide a preparation method of the modified PVC composite glove.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a modified PVC composite glove which comprises the following raw materials in parts by weight:
100 portions of PVC paste resin
30-50 parts of DOTP plasticizer
10-15 parts of TBC
5-10 parts of DOA
2-5 parts of mixed elastomer
10-30 parts of liquid nitrile rubber
Viscosity reducer D8028-33 parts
1-2 parts of heat stabilizer
And 1-2 parts of color paste.
Wherein: the DOTP (dioctyl terephthalate, molecular formula: C24H38O 4) is a novel environment-friendly plasticizer, can pass through the EU reach regulation, has good compatibility with PVC materials, is not easy to volatilize and migrate, and can improve the extensibility and the flexibility of the gloves.
The environment-friendly plasticizer TBC (tributyl citrate, molecular formula: C18H32O 7) is the safest nontoxic environment-friendly plasticizer recognized by health organizations of various countries, has strong solubility, good paste fluidity, good oil resistance and light resistance, good mildew resistance, good compatibility with polyvinyl chloride paste resin, no toxicity, no odor, good transparency, excellent processability of plastic products plasticized by the plasticizer TBC and good heat seal property.
The plasticizer DOA has excellent low-temperature flexibility and certain photo-thermal stability and water resistance. The initial viscosity of the mixed feed liquid is low, and the viscosity stability is good.
The elastomer is in a liquid form, is a mixture consisting of adipate, phosphate, acrylate and polyalcohol, has the main component of 100 percent of compatibility with PVC paste, reduces the loss of PVC plasticizer caused by migration volatilization and extraction, and can be used as a filling material, so that the PVC gloves have the advantages of reduced cost and excellent rebound resilience, softness and wear resistance.
The liquid nitrile rubber is LR-815MM which is used as a toughening agent for resins such as PVC resin, phenolic resin, epoxy resin and the like, and the low temperature resistance, heat resistance, resilience and softness of the PVC gloves can be improved after the liquid nitrile rubber is added.
The viscosity reducer D80 belongs to saturated alkanes, has a flash point higher than D70, can effectively reduce the viscosity of PVC paste resin emulsion and stabilize the PVC paste resin emulsion for a long time, enhances the plasticizing effect, and enables the finished glove product to have smooth hand feeling.
The heat stabilizer is a liquid calcium-zinc composite stabilizer, can replace toxic stabilizers such as lead-cadmium salts, organic tin and the like, has quite good thermal stability, light stability, transparency and tinting strength, and can effectively prevent the paste resin from decomposing hydrogen chloride gas due to high-temperature heat.
The color paste has low viscosity, easy addition and stable color, passes the Reach standard, and is safe, environment-friendly, light-resistant, weather-resistant, acid-base-resistant, high in coloring strength, strong in covering power and color development, and good in compatibility with polyvinyl chloride and storage stability.
The invention also provides a preparation method of the modified PVC composite glove, which comprises the following steps:
(1) primary burdening: mixing DOTP, TBC, DOA, elastomer and liquid nitrile rubber, stirring, and then sequentially adding PVC paste resin, a calcium-zinc stabilizer and 5-10 parts of viscosity reducer D80;
(2) and (3) filtering: filtering the stirred feed liquid through a 200-mesh sieve;
(3) standing and vacuum defoaming: placing the feed liquid in an environment with the vacuum degree of-0.08-0.1 MPa at 40-45 ℃ for standing and defoaming for 36 h;
(4) secondary burdening: adding 20-30 parts of viscosity reducer into the material obtained in the step (3), and uniformly stirring;
(5) vacuum defoaming: defoaming the material prepared in the step (4) for 1.5h in the environment of the step (3);
(6) primary impregnation: feeding the feed liquid into a dipping tank in a production line, automatically feeding a hand mold on the production line into the dipping tank for material bonding, preheating the palm temperature of the hand mold to 65-70 ℃, and controlling the material temperature to 55-65 ℃;
(7) dripping: the hand mould after primary dipping is rotated continuously, so that the emulsion on the surface of the hand mould is uniformly distributed, the dripping emulsion returns to the dipping tank through the collecting tank, and the aim of controlling the gram weight of the glove to be stable is achieved by adjusting the speed of the dripping section and the viscosity of the feed liquid;
(8) primary plasticizing: moving the dropped hand mold along with the production line into an oven, controlling the temperature of the oven at 230-250 ℃, and plasticizing and molding the emulsion on the hand mold;
(9) and (3) cooling: the temperature of the dipping smoke-locking groove is controlled below 70 ℃ so as to achieve the purpose of reducing the temperature of the hand mould;
(10) secondary impregnation: diluting waterborne polyurethane and softened water according to a certain proportion, adding 8% ammonia water to adjust the pH value to 9-10, filtering by using a 200-mesh sieve, pumping into a PU trough, feeding the hand mold in the step (9) into the PU trough, and dipping at 48-55 ℃;
(11) secondary plasticization: moving the hand mold with the secondary feed liquid into an oven for drying, controlling the temperature of the oven at 140-150 ℃, and taking PU surface drying of the hand mold as a standard;
(12) cooling the curled lip: naturally cooling the hand mold with the dried product from the oven to 70-85 ℃ and then rolling the lip;
(13) and demolding, inspecting and sorting.
The invention has the beneficial effects that: the TBC facilitates liquid nitrile rubber 815 mixing; the liquid elastomer improves the plasticizing effect of DOTP; the liquid nitrile rubber 815 can enhance the hand feeling of the gloves, the modified PVC composite gloves obtained by the formula and the production method can solve the problems of poor paste fluidity, poor hand feeling and elasticity of finished gloves and the like in the manufacturing process of common PVC gloves, and the obtained modified PVC composite gloves have the characteristics of low production cost and good hand feeling and elasticity.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying specific embodiments, in which some, but not all embodiments of the invention are shown. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments disclosed herein are intended to be within the scope of the present invention.
The invention provides a modified PVC composite glove which comprises the following raw materials in parts by weight:
100 portions of PVC paste resin
30-50 parts of DOTP plasticizer
10-15 parts of TBC
5-10 parts of DOA
2-5 parts of mixed elastomer
10-30 parts of liquid nitrile rubber
Viscosity reducer D8028-33 parts
1-2 parts of heat stabilizer
1-2 parts of color paste
The invention also provides a preparation method of the modified PVC composite glove, which comprises the following steps:
(1) mixing and stirring DOTP, TBC, DOA, an elastomer and liquid nitrile-butadiene rubber, and then sequentially adding PVC paste resin, a calcium-zinc stabilizer and 5-10 parts of a viscosity reducer D80;
(2) and (3) filtering: filtering the stirred feed liquid through a 200-mesh sieve;
(3) standing and vacuum defoaming: placing the feed liquid in an environment with the vacuum degree of-0.08-0.1 MPa at 40-45 ℃ for standing and defoaming for 36 h;
(4) secondary burdening: adding 20-30 parts of viscosity reducer into the material obtained in the step (3), and uniformly stirring;
(5) vacuum defoaming: defoaming the material prepared in the step (4) for 1.5h in the environment of the step (3);
(6) primary impregnation: feeding the feed liquid into a dipping tank in a production line, automatically feeding a hand mold on the production line into the dipping tank for material bonding, preheating the palm temperature of the hand mold to 65-70 ℃, and controlling the material temperature to 55-65 ℃;
(7) dripping: the hand mould after primary dipping is rotated continuously, so that the emulsion on the surface of the hand mould is uniformly distributed, the dripping emulsion returns to the dipping tank through the collecting tank, and the aim of controlling the gram weight of the glove to be stable is achieved by adjusting the speed of the dripping section and the viscosity of the feed liquid;
(8) primary plasticizing: moving the dropped hand mold along with the production line into an oven, controlling the temperature of the oven at 230-250 ℃, and plasticizing and molding the emulsion on the hand mold;
(9) and (3) cooling: the temperature of the dipping smoke-locking groove is controlled below 70 ℃ so as to achieve the purpose of reducing the temperature of the hand mould;
(10) secondary impregnation: diluting the waterborne polyurethane and the softened water according to a certain proportion, adding 8% ammonia water to adjust the PH to 9-10, filtering by using a 200-mesh sieve, and pumping into a PU trough. The hand mold in the step (9) enters a PU trough, and is soaked at the temperature of 48-55 ℃;
(11) secondary plasticization: moving the hand mold with the secondary feed liquid into an oven for drying, controlling the temperature of the oven at 140-150 ℃, and taking PU surface drying of the hand mold as a standard;
(12) cooling the curled lip: naturally cooling the hand mold with the dried product from the oven to 70-85 ℃ and then rolling the lip;
(13) and demolding, inspecting and sorting.
The present invention will be described below with reference to specific examples.
Example 1
The modified PVC composite glove described in this embodiment is specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
30 parts of DOTP plasticizer
TBC 15 parts
DOA 10 parts
Elastomer 5 parts
30 portions of liquid butyronitrile rubber
Viscosity reducer D8028 parts
1 part of heat stabilizer
And 1 part of color paste.
The production process comprises the following steps:
(1) mixing and stirring DOTP, TBC, DOA, an elastomer and liquid nitrile-butadiene rubber, and then sequentially adding PVC paste resin, a calcium-zinc stabilizer and 8 parts of a viscosity reducer D80 to obtain a primary ingredient;
(2) and (3) filtering: filtering the stirred feed liquid through a 200-mesh sieve;
(3) standing and vacuum defoaming: placing the feed liquid in an environment with the temperature of 40-45 ℃ and the vacuum degree of-0.08 MPa for standing and defoaming for 36 h;
(4) secondary burdening: adding 20 parts of viscosity reducer D80 into the material prepared in the step (3), and uniformly stirring;
(5) vacuum defoaming: defoaming the ingredients prepared in the step (4) for 1.5h in the environment of the step (3);
(6) primary impregnation: feeding the feed liquid into a dipping tank in a production line, automatically feeding a hand mold on the production line into the dipping tank for material bonding, preheating the palm temperature of the hand mold to 65 ℃, and keeping the material temperature at 55 ℃;
(7) dripping: the hand mould after one-time dipping is rotated continuously to make the emulsion on the surface of the hand mould uniform. Returning the emulsion dripped from the dripping section to the dipping tank through a collecting tank, and achieving the purpose of controlling the weight of the gloves to be stable through adjusting the speed of the dripping section and the viscosity of the feed liquid;
(8) primary plasticizing: the hand mould after dripping moves into an oven along with the production line, the temperature of the oven is controlled at 230 ℃, baking is carried out for 6 min, and the emulsion on the hand mould is plasticized and formed;
(9) secondary impregnation: controlling the temperature of the dipping smoke locking groove to be 65 ℃;
(10) and (3) dipping for three times: diluting waterborne polyurethane and softened water according to a certain proportion, adding 8% ammonia water to adjust the pH value to 9.5, filtering by a 200-mesh sieve, pumping into a PU trough, then putting the hand mould in the step (9) into the PU trough, and dipping at 48 ℃;
(11) secondary plasticization: moving the hand mold of the formed product with the secondary feed liquid into an oven for drying, and controlling the temperature of the oven at 140 ℃;
(12) cooling the curled lip: naturally cooling the hand mold with the dried product from the oven to 85 ℃ for lip curling;
(13) and demolding, inspecting and sorting.
The physical properties of the modified PVC composite glove prepared in this example were tested, and 4 samples were taken, and the test results are shown in table 1.
Table 1 example 1 results of performance testing
Example 2
The modified PVC composite glove described in this embodiment is specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
50 parts of DOTP plasticizer
TBC10 parts
DOA 5 parts
Elastomer 5 parts
30 portions of liquid butyronitrile rubber
Viscosity reducer D8028 parts
2 parts of heat stabilizer
And 2 parts of color paste.
The production process comprises the following steps:
(1) mixing and stirring DOTP, TBC, DOA, an elastomer and liquid nitrile-butadiene rubber, and then sequentially adding PVC paste resin, a calcium-zinc stabilizer and 7 parts of a viscosity reducer D80 to obtain a primary ingredient;
(2) and (3) filtering: filtering the stirred feed liquid through a 200-mesh sieve;
(3) standing and vacuum defoaming: placing the feed liquid in an environment with the temperature of 40-45 ℃ and the vacuum degree of-0.08 MPa for standing and defoaming for 36 h;
(4) secondary burdening: adding 21 parts of viscosity reducer D80 into the material prepared in the step (3), and uniformly stirring;
(5) vacuum defoaming: defoaming the ingredients prepared in the step (4) for 1.5h in the environment of the step (3);
(6) primary impregnation: feeding the feed liquid into a dipping tank in a production line, automatically feeding a hand mold on the production line into the dipping tank for material bonding, preheating the palm temperature of the hand mold to 65 ℃, and keeping the material temperature at 55 ℃;
(7) dripping: the hand mould after one-time dipping is rotated continuously to make the emulsion on the surface of the hand mould uniform. Returning the emulsion dripped from the dripping section to the dipping tank through a collecting tank, and achieving the purpose of controlling the weight of the gloves to be stable through adjusting the speed of the dripping section and the viscosity of the feed liquid;
(8) primary plasticizing: the hand mould after dripping moves into an oven along with the production line, the temperature of the oven is controlled at 230 ℃, baking is carried out for 6 min, and the emulsion on the hand mould is plasticized and formed;
(9) secondary impregnation: controlling the temperature of the dipping smoke locking groove to be 65 ℃;
(10) and (3) dipping for three times: diluting the waterborne polyurethane and the softened water according to a certain proportion, adding 8% ammonia water to adjust the PH to 9.5,200 meshes, filtering, pumping into a PU trough, putting the hand mould obtained in the step (9) into the PU trough, and dipping at 48 ℃;
(11) secondary plasticization: moving the hand mold of the formed product with the secondary feed liquid into an oven for drying, and controlling the temperature of the oven at 140 ℃;
(12) cooling the curled lip: naturally cooling the hand mold with the dried product from the oven to 85 ℃ for lip curling;
(13) and demolding, inspecting and sorting.
The physical properties of the modified PVC composite glove prepared in this example were tested, 4 samples were taken, and the test results are shown in table 2.
Table 2 example 2 results of performance testing
Example 3
The modified PVC composite glove described in this embodiment is specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
50 parts of DOTP plasticizer
TBC10 parts
DOA 10 parts
Elastomer 5 parts
30 portions of liquid butyronitrile rubber
Viscosity reducer D8033 parts
1.2 parts of heat stabilizer
And 1 part of color paste.
The production process comprises the following steps:
(1) mixing and stirring DOTP, TBC, DOA, an elastomer and liquid nitrile-butadiene rubber, and then sequentially adding PVC paste resin, a calcium-zinc stabilizer and 10 parts of a viscosity reducer D80 to obtain a primary ingredient;
(2) and (3) filtering: filtering the stirred feed liquid through a 200-mesh sieve;
(3) standing and vacuum defoaming: placing the feed liquid in an environment with the temperature of 40-45 ℃ and the vacuum degree of-0.08 MPa for standing and defoaming for 36 h;
(4) secondary burdening: adding 23 parts of viscosity reducer D80 into the material prepared in the step (3), and uniformly stirring;
(5) vacuum defoaming: defoaming the ingredients prepared in the step (4) for 1.5h in the environment of the step (3);
(6) primary impregnation: feeding the feed liquid into a dipping tank in a production line, automatically feeding a hand mold on the production line into the dipping tank for material bonding, preheating the palm temperature of the hand mold to 65 ℃, and keeping the material temperature at 55 ℃;
(7) dripping: the hand mould after one-time dipping is rotated continuously to make the emulsion on the surface of the hand mould uniform. Returning the emulsion dripped from the dripping section to the dipping tank through a collecting tank, and achieving the purpose of controlling the weight of the gloves to be stable through adjusting the speed of the dripping section and the viscosity of the feed liquid;
(8) primary plasticizing: the hand mould after dripping moves into an oven along with the production line, the temperature of the oven is controlled at 230 ℃, baking is carried out for 6 min, and the emulsion on the hand mould is plasticized and formed;
(9) secondary impregnation: controlling the temperature of the dipping smoke locking groove to be 65 ℃;
(10) and (3) dipping for three times: diluting the waterborne polyurethane and the softened water according to a certain proportion, adding 8% ammonia water to adjust the PH to 9.5,200 meshes, filtering, pumping into a PU trough, putting the hand mould obtained in the step (9) into the PU trough, and dipping at 48 ℃;
(11) secondary plasticization: moving the hand mold of the formed product with the secondary feed liquid into an oven for drying, and controlling the temperature of the oven at 140 ℃;
(12) cooling the curled lip: naturally cooling the hand mold with the dried product from the oven to 85 ℃ for lip curling;
(13) and demolding, inspecting and sorting.
The physical properties of the modified PVC composite glove prepared in this example were tested, 4 samples were taken, and the test results are shown in table 3.
Table 3 example 3 results of performance testing
Example 4:
the modified PVC composite glove described in this embodiment is specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
50 parts of DOTP plasticizer
TBC10 parts
DOA 10 parts
Elastomer 5 parts
20 portions of liquid butyronitrile rubber
Viscosity reducer D8033 parts
1.2 parts of heat stabilizer
And 1 part of color paste.
The procedure is as in example 3, except that the amount of the liquid nitrile rubber used in step (1) is reduced from 30 parts to 20 parts.
The physical properties of the modified PVC composite glove prepared in this example were tested, 4 samples were taken, and the test results are shown in table 4.
Table 4 example 4 results of performance testing
Example 5:
the modified PVC composite glove described in this embodiment is specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
50 parts of DOTP plasticizer
TBC10 parts
DOA 10 parts
Elastomer 5 parts
10 portions of liquid butyronitrile rubber
Viscosity reducer D8033 parts
1.2 parts of heat stabilizer
And 1 part of color paste.
The procedure is as in example 3, except that the amount of the liquid nitrile rubber used in step (1) is reduced from 30 parts to 10 parts.
The physical properties of the modified PVC composite glove prepared in this example were tested, 4 samples were taken, and the test results are shown in table 5.
Table 5 example 5 results of performance testing
Example 6:
the modified PVC composite glove described in this embodiment is specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
50 parts of DOTP plasticizer
TBC10 parts
DOA 10 parts
Elastomer 5 parts
Viscosity reducer D8033 parts
1.2 parts of heat stabilizer
And 1 part of color paste.
The procedure is as in example 3, except that the amount of the liquid nitrile rubber used in step (1) is reduced from 30 parts to 0 part.
The physical properties of the modified PVC composite glove prepared in this example were tested, 4 samples were taken, and the test results are shown in table 6.
Table 6 example 6 results of performance testing
Comparative example 1:
the common PVC gloves are specifically composed of the following raw materials in parts by mass:
100 portions of PVC paste resin
50 parts of DOTP plasticizer
DOA 10 parts
Viscosity reducer D8033 parts
1.2 parts of heat stabilizer
And 1 part of color paste.
The production process is the same as the first embodiment except that the materials are prepared in the step (1): sequentially mixing and stirring DOTP, TBC, DOA, PVC paste resin, 10 parts of viscosity reducer D80, a heat stabilizer and color paste to obtain a primary ingredient.
Table 7 comparative example 1 performance test results
As can be seen from the comparison of tables 1,2,3,4,5, 6:
under the condition that other plasticizers and elastomers are the same, the addition part of the liquid nitrile rubber is reduced, and the tensile strength and the elongation of the glove are reduced;
as can be seen from comparison of tables 6 and 7:
under the condition that other plasticizers are the same, the tensile strength and the elongation of the glove can be improved by adding the elastomer;
as can be seen from a comparison of tables 1-7: the tensile strength and the elongation of the glove can be obviously improved by adding the elastomer and the liquid butyronitrile rubber.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the intention of all modifications, equivalents, improvements, and equivalents falling within the spirit and scope of the invention.
Claims (6)
1. A modified PVC composite glove is characterized in that: the composite material comprises the following raw materials in parts by weight:
100 portions of PVC paste resin
30-50 parts of DOTP plasticizer
10-15 parts of TBC
5-10 parts of DOA
2-5 parts of mixed elastomer
10-30 parts of liquid nitrile rubber
Viscosity reducer D8028-33 parts
1-2 parts of heat stabilizer
And 1-2 parts of color paste.
2. The modified PVC composite glove of claim 1, wherein: the mixed elastomer is in liquid form and is a mixture consisting of adipate, phosphate, acrylate and polyol.
3. The modified PVC composite glove of claim 1, wherein: the liquid nitrile rubber is LR-815 MM.
4. The modified PVC composite glove of claim 1, wherein: the heat stabilizer is a liquid calcium-zinc composite stabilizer.
5. The method of making a modified PVC composite glove according to any one of claims 1-4, wherein: comprises the following steps:
(1) primary burdening: mixing DOTP, TBC, DOA, elastomer and liquid nitrile rubber, stirring, and then sequentially adding PVC paste resin, a calcium-zinc stabilizer and 5-10 parts of viscosity reducer D80;
(2) and (3) filtering: filtering the stirred feed liquid through a 200-mesh sieve;
(3) standing and vacuum defoaming: placing the feed liquid in a vacuum environment, standing and defoaming for 36 h;
(4) secondary burdening: adding 20-30 parts of viscosity reducer into the material obtained in the step (3), and uniformly stirring;
(5) vacuum defoaming: defoaming the material prepared in the step (4) for 1.5h in the environment of the step (3);
(6) primary impregnation: feeding the feed liquid into a dipping tank in a production line, automatically feeding a hand mold on the production line into the dipping tank for material bonding, preheating the palm temperature of the hand mold to 65-70 ℃, and controlling the material temperature to 55-65 ℃;
(7) dripping: the hand mould after primary dipping is rotated continuously, so that the emulsion on the surface of the hand mould is uniformly distributed, the dripping emulsion returns to the dipping tank through the collecting tank, and the aim of controlling the gram weight of the glove to be stable is achieved by adjusting the speed of the dripping section and the viscosity of the feed liquid;
(8) primary plasticizing: moving the dropped hand mold along with the production line into an oven, controlling the temperature of the oven at 230-250 ℃, and plasticizing and molding the emulsion on the hand mold;
(9) and (3) cooling: the temperature of the dipping smoke-locking groove is controlled below 70 ℃ so as to achieve the purpose of reducing the temperature of the hand mould;
(10) secondary impregnation: diluting waterborne polyurethane and softened water according to a certain proportion, adding 8% ammonia water to adjust the pH value to 9-10, filtering by using a 200-mesh sieve, and pumping into a PU trough; the hand mold in the step (9) enters a PU trough, and is soaked at the temperature of 48-55 ℃;
(11) secondary plasticization: moving the hand mold with the secondary feed liquid into an oven for drying, controlling the temperature of the oven at 140-150 ℃, and taking PU surface drying of the hand mold as a standard;
(12) cooling the curled lip: naturally cooling the hand mold with the dried product from the oven to 70-85 ℃ and then rolling the lip;
(13) and demolding, inspecting and sorting.
6. The method for preparing modified PVC composite gloves according to claim 5, wherein: the vacuum environment in the step 4 is at the temperature of 40-45 ℃ and the vacuum degree of-0.08-0.1 MPa.
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