CN113858514A - Production method of butyronitrile latex gloves with stable performance - Google Patents
Production method of butyronitrile latex gloves with stable performance Download PDFInfo
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- CN113858514A CN113858514A CN202111066271.3A CN202111066271A CN113858514A CN 113858514 A CN113858514 A CN 113858514A CN 202111066271 A CN202111066271 A CN 202111066271A CN 113858514 A CN113858514 A CN 113858514A
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- 229920000126 latex Polymers 0.000 title claims abstract description 159
- 239000004816 latex Substances 0.000 title claims abstract description 157
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000007598 dipping method Methods 0.000 claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 15
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 13
- 238000012805 post-processing Methods 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 9
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000460 chlorine Substances 0.000 claims abstract description 6
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000002386 leaching Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 45
- 239000003292 glue Substances 0.000 claims description 35
- 239000006185 dispersion Substances 0.000 claims description 22
- 229920000459 Nitrile rubber Polymers 0.000 claims description 19
- 238000005470 impregnation Methods 0.000 claims description 18
- 150000002825 nitriles Chemical class 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000001802 infusion Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 2
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- 238000000034 method Methods 0.000 abstract description 10
- 230000001502 supplementing effect Effects 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 7
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 6
- 238000000498 ball milling Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
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- 239000002356 single layer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
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- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
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- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 210000001145 finger joint Anatomy 0.000 description 1
- -1 inorganic compound zinc oxide Chemical class 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
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- 239000003208 petroleum Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000012936 vulcanization activator Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/163—Stirring means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1815—Cooling or heating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- 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
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/36—Feeding the material on to the mould, core or other substrate
-
- 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
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/52—Measuring, controlling or regulating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Moulding By Coating Moulds (AREA)
- Gloves (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a production method of butyronitrile latex gloves with stable performance, which improves the production efficiency of the butyronitrile latex gloves, reduces the cost and has stable and reliable production method. The method comprises a ceramic glove mold cleaning unit, a glove mold latex dipping unit, a drying and curling unit, a hot air vulcanizing unit, a glove water cooling and chlorine washing unit, a leaching and water washing unit, a glove demolding unit, a glove post-processing unit and a prevulcanization latex preparation unit for providing latex for the glove mold latex dipping unit, wherein after demolding of the glove, the mold returns to the ceramic glove mold cleaning unit to enter the production process flow for circulation, the glove is inspected and boxed for storage after being processed by the post-processing unit, and a latex dipping tank in the glove mold latex dipping unit is provided with an automatic liquid supplementing and liquid level control system; the pre-vulcanized latex preparation unit is provided with a temperature-controllable functional auxiliary agent grinding and dispersing device for the nitrile-butadiene latex.
Description
Technical Field
The invention relates to a method for producing butyronitrile latex gloves, in particular to a method for producing butyronitrile latex gloves with stable performance.
Background
With the rapid development of the economic society, people continuously pursue high-quality living standard, which makes high-tech products emerge endlessly. People have higher and higher precision requirements on high-tech products, and many products need to be tested and produced in a clean room. The gloves are particularly important as protective articles, so that the precision of products in the production process can be ensured, and the safety of production personnel can be protected. The common types of gloves are numerous and mainly include: leather gloves, cloth gloves, special gloves and latex gloves. Among them, latex gloves are increasingly playing an important role in glove articles due to their great number of applications in the fields of medical treatment, food, beauty, electronics, and photovoltaics, taking advantage of abrasion resistance, puncture resistance, and anti-slip, etc., and it is reported that about 600 hundred million latex gloves are consumed worldwide every year. The nitrile rubber is a copolymer polymerized by acrylonitrile and butadiene monomers, and is produced by adopting a low-temperature emulsion polymerization method. Because the molecular chain of the nitrile rubber has cyano, the nitrile rubber has stronger polarity and excellent oil resistance. The nitrile rubber has good heat resistance and can be used for a long time at the temperature of 120 ℃. The nitrile rubber also has good mechanical property and resistance to chemicals such as benzene, petroleum-based oils, non-polar solvents and the like, so that the nitrile rubber is very suitable for being used in the field of scientific research. The nitrile rubber can be classified into ultra-high, medium-low and low acrylonitrile rubber according to the content of Acrylonitrile (ACN). With the increase of the content of acrylonitrile, the polarity of the nitrile rubber is enhanced, the interaction force among chains is increased, the flexibility of the chains is reduced, the content of double bonds in the molecular chains is reduced, the oil resistance, the air tightness and the wear resistance of the nitrile rubber are improved, and the processability and the cold resistance are reduced. Therefore, the nitrile rubber has the advantages of good chemical corrosion resistance, organic solvent resistance and the like due to the fact that the nitrile rubber contains strongly polar acrylonitrile units, and is widely applied to the field of daily protective gloves. Meanwhile, in rubber latex gloves, nitrile latex gloves are gradually replacing natural latex gloves, because the cost for producing the natural latex gloves is high and the natural latex contains protein, so that allergy of partial people is easily caused. The nitrile rubber latex gloves are nontoxic, harmless, durable, little in damage to human skin and good in adhesion, and can be widely applied to the fields of electronic, chemical, food and other factories, hospitals, scientific researches and the like. The existing production method mainly comprises a ceramic glove mold cleaning unit, a glove mold latex dipping unit, a drying and curling unit, a hot air vulcanization unit, a glove water cooling and chlorine washing unit, a leaching and washing unit, a glove demolding unit, a glove post-treatment unit and the like, wherein the mold of the glove after demolding returns to the ceramic glove mold cleaning unit to enter the production process circulation, the glove mold latex dipping unit is also connected with a prevulcanization latex preparation unit to provide latex for the latex dipping, and the glove after-treatment unit is used for treating the glove and then can be boxed, inspected and warehoused.
In the existing production process flow, each unit may affect the production stability, production efficiency and product quality, and there are many problems to be solved urgently, wherein the structure of the dipping tank of the glove mold dipping latex unit and the auxiliary grinding and dispersing device of the prevulcanization latex preparation unit have a large impact on the performance stability of the glove product, and at present, the following problems also exist:
latex dipping unit of glove mold: in the actual production process, the liquid level of the latex in the dipping tank of the latex dipping unit of the glove mold has great influence on the subsequent curling link, and the liquid level of the latex gradually drops as the latex in the dipping tank is repeatedly taken away by the mold. When the latex liquid level is lower than a certain height, a series of quality problems (such as insufficient curling and the like) occur to the latex gloves. The traditional solution is to arrange a specially-assigned person to record the liquid level condition of the latex and control the scale of a valve for injecting the latex into a dipping tank, and the problems generated in the production process mainly comprise: a large amount of hands are needed to maintain the operation of the gum dipping tank of the production line, and the cost of the people is high; the latex liquid level height is controlled only by a manual mode, and the stability of the quality of the latex gloves in continuous production cannot be ensured; the latex glove quality problem caused by the fluctuation of the latex liquid level in the rubber feeding process needs to be developed and developed, so that the automatic liquid supplementing and liquid level control system of the dipping tank of the latex dipping unit of the glove mold is required to automatically control the latex liquid level position, keep the latex emulsion in a relatively stable state, and finally improve the stability of the latex product quality.
Prevulcanised latex preparation unit: the preparation process of the nitrile rubber gloves mainly adopts the vulcanization molding of nitrile rubber latex, and because an inorganic compound zinc oxide is required to be used as a vulcanization activator in a nitrile rubber latex formula system, organic compounds such as a vulcanization accelerator, an anti-aging agent and the like are also required to be used; in addition, it is also possible to use organic dispersants, inorganic pigments, and the like. Therefore, the multicomponent compounds and their performance differences (organic and inorganic compounds, density, particle size, etc.) in the formula system of the nitrile latex lead to the most basic condition that when they are mixed to prepare the functional assistant aqueous dispersion for nitrile latex, the assistant particle size is reduced and uniformly dispersed by special equipment to achieve the purpose of uniform mixing, and the mixing time is also desired to be as short as possible to improve the production efficiency. In the prior art, a stainless steel stirring ball mill in a pre-vulcanized latex preparation unit mainly comprises a stainless steel single-layer stirring ball mill shell, a screen, metal balls, traditional stirring blades, a motor and a thermometer. In the process of preparing the functional assistant aqueous dispersion for nitrile latex by using a stainless steel single-layer stirring ball mill, the mixing time is as long as 6 hours due to the absence of temperature control and a corresponding cooling system. The longer mixing time brings the temperature of the mixed liquid to rise, and the temperature of the mixed liquid is often over 50 ℃ and even 60 ℃; higher temperatures cause some organic adjuvants to agglomerate, affecting later use and final product quality. Therefore, a functional auxiliary agent grinding and dispersing device for the temperature-controllable nitrile latex in a pre-vulcanized latex preparation unit needs to be developed to solve the problems in the prior art.
Therefore, a production method of nitrile latex gloves with stable performance needs to be developed aiming at the problems and the defects of the two units, so that the production stability, the production efficiency and the product quality are improved.
Disclosure of Invention
The invention aims to solve the problems and the defects in the prior art, provides the production method of the butyronitrile latex gloves with stable performance, realizes the efficient and stable production of the functional assistant dispersion liquid for the butyronitrile latex, shortens the ball milling time from the original 6 hours to 3 hours, further improves the production efficiency and reduces the cost; the latex liquid level position of the dipping tank is automatically controlled, the stability of the quality of the latex product is finally improved, and the production method is reliable.
The invention is realized by the following technical scheme:
the invention relates to a production method of butyronitrile latex gloves with stable performance, which comprises a ceramic glove mold cleaning unit, a glove mold latex dipping unit, a drying and curling unit, a hot air vulcanization unit, a glove water cooling and chlorine washing unit, a leaching and water washing unit, a glove demolding unit, a glove post-processing unit and a pre-vulcanized latex preparation unit for providing latex for the glove mold latex dipping unit, wherein the mold returns to the ceramic glove mold cleaning unit after the glove is demolded to enter the production process flow for circulation, the glove is processed by the post-processing unit and then is inspected and boxed for storage, the glove mold latex dipping tank in the glove mold latex dipping unit is provided with an automatic fluid infusion and liquid level control system, the glove mold latex dipping tank comprises a latex dipping tank, a latex inlet pipeline for conveying latex to the latex dipping tank, a centrifugal pump, a latex storage tank and a filter screen, and the two latex inlet ports of the latex inlet pipeline for conveying latex to the dipping tank are arranged, the liquid level meter is provided with an upper sensor and a lower sensor which are positioned in the impregnation tank, the upper sensor is fixed at a fifth part of the height from the bottom of the impregnation tank, the lower sensor is fixed at a fourth part of the height from the bottom of the impregnation tank, eight baffles are arranged in the impregnation tank, wherein the No. 3 baffle and the No. 8 baffle are respectively positioned above the two glue inlets and fixed at a seventh height from the left side and the right side of the bottom of the impregnation tank, the lengths of the No. 3 baffle and the No. 8 baffle are respectively one fourth of the length of the impregnation tank, the No. 1 baffle and the No. 2 baffle are respectively fixed at six seventh height and three seventh height from the left side of the bottom of the impregnation tank, the No. 4 baffle and the No. 6 baffle are respectively fixed at six seventh height and three seventh height from the right side of the bottom of the impregnation tank, and the lengths of the No. 1 baffle, the No. 2 baffle, the No. 4 baffle and the No. 6 baffle are respectively one seventh of the length of the impregnation tank, an upper sensor and a lower sensor of the liquid level meter are fixed between a No. 4 baffle and a No. 6 baffle, a No. 5 baffle is fixed on the side surface of the No. 4 baffle and extends downwards to be flush with the upper sensor, the length of the No. 5 baffle is the same as the width of the No. 4 baffle, a No. 7 baffle is fixed on the side surface of the No. 6 baffle and extends upwards to be flush with the lower sensor, and the length of the No. 7 baffle is the same as the width of the No. 6 baffle; the pre-vulcanized latex preparation unit is provided with a temperature-controllable nitrile latex functional auxiliary agent grinding and dispersing device, which comprises a stirring ball mill shell, a screen, metal balls, stirring blades, a motor and a temperature control device, wherein the stirring ball mill shell is of a hollow jacket double-layer structure, the hollow jacket is connected with a circulating water temperature automatic control system through a pipeline, a set of blades are respectively added at two ends of a fixing plate of each stirring blade, the two sets of blades are arranged at the outermost edge of the fixing plate of each stirring blade, and the structural design of the two sets of blades is parallel to a stirring shaft of each stirring blade.
The production method of the nitrile latex gloves with stable performance has the further technical scheme that the automatic circulating water temperature control system consists of a reservoir, a heat-sensitive probe, a temperature control switch, a filter and a water pump, wherein the water pump is connected with the reservoir through a pipeline and is connected with a water inlet at the lower end of a hollow jacket of a shell of the stirring ball mill through the filter and the pipeline, a water outlet is formed in the upper end of the other side of the hollow jacket of the shell of the stirring ball mill and is connected with the reservoir through a pipeline, and the temperature control switch is connected with the heat-sensitive probe for measuring the temperature of the functional auxiliary agent water dispersion liquid in the ball mill and is also connected with the water pump.
The production method of the nitrile latex gloves with stable performance, provided by the invention, has the further technical scheme that the temperature of the functional auxiliary agent aqueous dispersion in the ball mill is controlled to be 25-30 ℃.
The production method of the nitrile latex gloves with stable performance, provided by the invention, has the further technical scheme that the width and the thickness of the eight baffles are respectively four fifths of the width and one fifteenth of the height of the dipping groove; the diameter of the tail end of the glue inlet pipeline is 150 mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a production method of butyronitrile latex gloves with stable performance, which comprises the following process flows:
the temperature-controllable nitrile latex grinding and dispersing device for the nitrile latex of the pre-vulcanized latex preparation unit has the following beneficial effects: firstly, a stainless steel single-layer (without a jacket) ball mill shell is changed into a stainless steel double-layer (hollow jacket) shell, and the heat exchange is increased by utilizing the larger contact area of the inner layer of the ball mill shell and a circulating water system in the hollow jacket, so that the heat generated in the process of preparing the functional aid water dispersion liquid is effectively removed, the temperature of the functional aid water dispersion liquid is greatly reduced, and the production efficiency is improved. Secondly, a jacket circulating water temperature automatic control system is added: a thermosensitive probe for measuring the temperature of the functional assistant water dispersion liquid in the ball mill is connected with a circulating water switch to realize automatic control and keep the temperature between 25 and 30 ℃. When the temperature of the dispersion liquid in the ball mill rises to 30 ℃, the jacket circulating water cooling system is automatically opened; when the temperature of the dispersion liquid in the ball mill is reduced to 25 ℃, the jacket circulating water cooling system is automatically closed. The automatic control system for the circulating water temperature of the jacket can effectively control the temperature of the dispersion liquid in the ball mill and stabilize the quality of the functional auxiliary agent water dispersion liquid. Improving the structure of the stirring blade of the ball mill: under the action of the existing multiple groups of stirring blades, the dispersion liquid in the ball mill mainly generates radial flow. On the basis, a group of special blade structures are additionally arranged at two ends of a plurality of groups of stirring blade fixing plates, the special stirring blades are positioned at the outermost edges of the blade fixing plates, the blade structures are designed to be parallel to the stirring shaft, and the axial flow of the functional auxiliary agent water dispersion liquid is increased during the action of the stirring blades. The improved stirring blades simultaneously realize the parallel radial flow and axial flow of the dispersion liquid during ball milling, effectively improve the mixing effect and reduce the ball milling time. In conclusion, the efficient and stable production of the functional aid dispersion liquid for the nitrile rubber latex is realized by improving the ball milling equipment in three aspects, the ball milling time is shortened from the original 6 hours to 3 hours, and the product quality is correspondingly improved in the later period.
The glove mold latex dipping unit has the following beneficial effects that the dipping groove is provided with an automatic liquid supplementing and liquid level control system: a single glue inlet above the dipping tank is changed into double glue inlets at the bottom of the dipping tank, the double glue inlets are respectively positioned at the left side and the right side of the bottom of the dipping tank, and a baffle plate is fixed above the glue inlets, so that the fluctuation of the latex liquid level generated in the glue inlet process is effectively eliminated, and the stability of the latex glove quality is improved. An automatic liquid supplementing and liquid level control system is added: the liquid level meter is connected with the centrifugal pump in the rubber inlet pipeline, so that the liquid level of the rubber latex is automatically controlled within a reasonable range, the curling process is stabilized, the automatic production is realized, and the production cost is reduced. Eight baffles are additionally arranged on the left side and the right side inside the dipping tank, so that the fluctuation of the latex liquid level caused by the hand mould in the latex dipping process and the latex inlet in the latex feeding process is reduced, the reliability of the measurement data of the liquid level meter is improved, and the stability of the latex glove quality is further ensured.
Drawings
FIG. 1 is a process flow diagram of the production method of nitrile latex gloves with stable performance
FIG. 2 is a schematic structural diagram of a temperature-controllable functional additive grinding and dispersing device for nitrile latex of a pre-vulcanized latex preparation unit.
In fig. 2: 2-1 is a hollow jacket double-layer stirring ball mill shell, 2-2 is a screen, 2-3 is a metal ball, 2-4 is a stirring blade, 2-5 is a water storage tank, 2-6 is a motor, 2-7 is a heat-sensitive probe, 2-8 is a temperature control switch, 2-9 is a filter, 2-10 is a water pump, 2-11 is the ground, and 2-12 is a concrete layer.
FIG. 3 is a schematic structural view of an automatic fluid infusion and liquid level control system configured in a dipping tank of the glove mold dipping latex unit.
In fig. 3: 3-1 is a hand mould transmission guide rail, 3-2 is a hand mould, 3-3 is a glue dipping tank, 3-4 is a No. 1 baffle, 3-5 is a No. 2 baffle, 3-6 is a No. 3 baffle, 3-7 is a glue inlet pipeline, 3-8 is latex liquid, 3-9 is a No. 8 baffle, 3-10 is a No. 7 baffle, 3-11 is a No. 6 baffle, 3-12 is a centrifugal pump, 3-13 is a latex storage tank, 3-14 is a filter screen, 3-15 is a liquid level meter, 3-16 is a lower sensor, 3-17 is an upper sensor, 3-18 is a No. 4 baffle, and 3-19 is a No. 5 baffle.
Detailed Description
The invention is further explained with reference to the drawings.
Example 1
As shown in the figure, the production method of the nitrile latex gloves with stable performance comprises a ceramic glove mold cleaning unit, a glove mold latex dipping unit, a drying and curling unit, a hot air vulcanization unit, a glove water cooling and chlorine washing unit, a leaching and water washing unit, a glove demolding unit, a glove post-processing unit and a pre-vulcanized latex preparation unit for providing latex for the latex dipping of the glove mold latex dipping unit, wherein the mold returns to the ceramic glove mold cleaning unit after the glove is demolded to enter the production process flow for circulation, the glove is inspected and boxed for storage after being processed by the post-processing unit, the latex dipping tank of the glove mold latex dipping unit is provided with an automatic fluid infusion and liquid level control system and comprises a latex dipping tank, a latex inlet pipeline for conveying latex to the latex dipping tank, a centrifugal pump, a latex storage tank and a filter screen, the number of the two latex inlet ports of the latex inlet pipeline for conveying latex to the latex tank is two, are respectively positioned at one sixth of the left edge and the right edge of the bottom of the dipping tank; a liquid level meter is arranged outside the glue dipping tank and is in control connection with the centrifugal pump, the liquid level meter is provided with an upper sensor and a lower sensor which are positioned in the glue dipping tank, the upper sensor is fixed at five parts of the height from the bottom of the glue dipping tank, and the lower sensor is fixed at four parts of the height from the bottom of the glue dipping tank; eight baffles are arranged in the glue dipping tank, wherein the No. 3 baffle and the No. 8 baffle are respectively positioned above the two glue inlets and are fixed at the one-seventh height from the left side and the right side of the bottom of the glue dipping tank, the lengths of the No. 3 baffle and the No. 8 baffle are both one fourth of the length of the glue dipping tank, the No. 1 baffle and the No. 2 baffle are respectively fixed at the six-seventh height and the three-seventh height from the left side of the bottom of the glue dipping tank, the No. 4 baffle and the No. 6 baffle are respectively fixed at the six-seventh height and the three-seventh height from the right side of the bottom of the glue dipping tank, the lengths of the No. 1 baffle, the No. 2 baffle, the No. 4 baffle and the No. 6 baffle are all one-seventh of the length of the glue dipping tank, the upper sensor and the lower sensor of the liquid level meter are fixed between the No. 4 baffle and the No. 6 baffle, the No. 5 baffle is fixed at the side of the No. 4 baffle and extends downwards to be flush with the upper sensor, the No. 4 baffle is as wide as the No. 7 baffle is fixed at the side of the lower sensor, the length of the No. 7 baffle is the same as the width of the No. 6 baffle, and the width and the thickness of the eight baffles are respectively four fifths of the width of the dipping tank and one fifteenth of the height of the dipping tank; the diameter of the tail end of the glue inlet pipeline is 150 mm. The pre-vulcanized latex preparation unit is provided with a temperature-controllable functional auxiliary agent grinding and dispersing device for nitrile-butadiene latex, and the device comprises a ball mill shell, a screen, metal balls, stirring blades, a motor and a temperature control device, wherein the stirring ball mill shell is of a hollow jacket double-layer structure, and the hollow jacket is connected with a circulating water temperature automatic control system through a pipeline; two ends of a fixing plate of the stirring blade are respectively provided with a group of blades, the two groups of blades are positioned at the edge of the outermost end of the fixing plate of the stirring blade, and the two groups of blades are structurally designed to be parallel to a stirring shaft of the stirring blade; the automatic circulating water temperature control system consists of a reservoir, a thermosensitive probe, a temperature control switch, a filter and a water pump, wherein the water pump is connected with the reservoir through a pipeline and is connected with a water inlet at the lower end of a hollow jacket of the shell of the stirring ball mill through the filter and the pipeline; the temperature control switch is connected with a thermosensitive probe for measuring the temperature of the functional auxiliary agent aqueous dispersion in the ball mill and is also connected with a water pump; the temperature of the functional assistant water dispersion liquid in the ball mill is controlled between 25 ℃ and 30 ℃.
Example 2
As shown in the figure, the production method of the nitrile latex gloves with stable performance comprises a ceramic glove mold cleaning unit, a glove mold latex dipping unit, a drying and curling unit, a hot air vulcanization unit, a glove water cooling and chlorine washing unit, a leaching and water washing unit, a glove demolding unit, a glove post-processing unit and a pre-vulcanized latex preparation unit for providing latex for the latex dipping of the glove mold latex dipping unit, wherein the mold returns to the ceramic glove mold cleaning unit after the glove is demolded to enter the production process flow for circulation, the glove is inspected and boxed for storage after being processed by the post-processing unit, the latex dipping tank of the glove mold latex dipping unit is provided with an automatic fluid infusion and liquid level control system and comprises a latex dipping tank, a latex inlet pipeline for conveying latex to the latex dipping tank, a centrifugal pump, a latex storage tank and a filter screen, the number of the two latex inlet ports of the latex inlet pipeline for conveying latex to the latex tank is two, are respectively positioned at one sixth of the left edge and the right edge of the bottom of the dipping tank; a liquid level meter is arranged outside the glue dipping tank and is in control connection with the centrifugal pump, the liquid level meter is provided with an upper sensor and a lower sensor which are positioned in the glue dipping tank, the upper sensor is fixed at five parts of the height from the bottom of the glue dipping tank, and the lower sensor is fixed at four parts of the height from the bottom of the glue dipping tank; eight baffles are arranged in the glue dipping tank, wherein the No. 3 baffle and the No. 8 baffle are respectively positioned above the two glue inlets and are fixed at the one-seventh height from the left side and the right side of the bottom of the glue dipping tank, the lengths of the No. 3 baffle and the No. 8 baffle are both one fourth of the length of the glue dipping tank, the No. 1 baffle and the No. 2 baffle are respectively fixed at the six-seventh height and the three-seventh height from the left side of the bottom of the glue dipping tank, the No. 4 baffle and the No. 6 baffle are respectively fixed at the six-seventh height and the three-seventh height from the right side of the bottom of the glue dipping tank, the lengths of the No. 1 baffle, the No. 2 baffle, the No. 4 baffle and the No. 6 baffle are all one-seventh of the length of the glue dipping tank, the upper sensor and the lower sensor of the liquid level meter are fixed between the No. 4 baffle and the No. 6 baffle, the No. 5 baffle is fixed at the side of the No. 4 baffle and extends downwards to be flush with the upper sensor, the No. 4 baffle is as wide as the No. 7 baffle is fixed at the side of the lower sensor, the length of the No. 7 baffle is the same as the width of the No. 6 baffle, and the width and the thickness of the eight baffles are respectively four fifths of the width of the dipping tank and one fifteenth of the height of the dipping tank; the diameter of the tail end of the glue inlet pipeline is 150 mm. The pre-vulcanized latex preparation unit is provided with a temperature-controllable functional auxiliary agent grinding and dispersing device for nitrile-butadiene latex, and the device comprises a ball mill shell, a screen, metal balls, stirring blades, a motor and a temperature control device, wherein the stirring ball mill shell is of a hollow jacket double-layer structure, and the hollow jacket is connected with a circulating water temperature automatic control system through a pipeline; two ends of a fixing plate of the stirring blade are respectively provided with a group of blades, the two groups of blades are positioned at the edge of the outermost end of the fixing plate of the stirring blade, and the two groups of blades are structurally designed to be parallel to a stirring shaft of the stirring blade; the automatic circulating water temperature control system consists of a reservoir, a thermosensitive probe, a temperature control switch, a filter and a water pump, wherein the water pump is connected with the reservoir through a pipeline and is connected with a water inlet at the lower end of a hollow jacket of the shell of the stirring ball mill through the filter and the pipeline; the temperature control switch is connected with a thermosensitive probe for measuring the temperature of the functional auxiliary agent aqueous dispersion in the ball mill and is also connected with a water pump; the temperature of the functional assistant water dispersion liquid in the ball mill is controlled between 25 ℃ and 30 ℃. The ceramic glove mold cleaning unit is sequentially provided with a pickling tank, a first rinsing tank, an alkaline washing tank, a disc brush cleaning device and a second rinsing tank, an ultrasonic cleaning tank is arranged between the alkaline washing tank and the disc brush cleaning device, and a cleaning agent (anhydrous sodium metaphosphate or anhydrous sodium metasilicate) is combined to further clean the ceramic hand mold, so that the cleaning efficiency of the surface of the hand mold and finger joints is greatly improved; the ultrasonic cleaning tank is added, the use amount of acid and alkali in the early-stage acid cleaning and alkali cleaning processes can be reduced, the service cycle of the ceramic hand model is prolonged, and the cost of post-stage washing wastewater treatment is reduced.
Claims (4)
1. A production method of butyronitrile latex gloves with stable performance comprises a ceramic glove mold cleaning unit, a glove mold latex dipping unit, a drying and curling unit, a hot air vulcanization unit, a glove water cooling and chlorine washing unit, a leaching and water washing unit, a glove demolding unit, a glove post-processing unit and a pre-vulcanized latex preparation unit for providing latex for the glove mold latex dipping unit, wherein the mold returns to the ceramic glove mold cleaning unit after the glove is demolded to enter a production process flow for circulation, the glove is processed by the post-processing unit and then is inspected, boxed and warehoused, the production method is characterized in that the glove mold latex dipping tank in the glove mold latex dipping unit is provided with an automatic fluid infusion and liquid level control system, the glove mold latex dipping tank comprises a latex tank, a latex inlet pipeline for conveying latex to the latex tank, a centrifugal pump, a latex storage tank and a filter screen, the number of the two latex inlet ports of the latex inlet pipeline for conveying latex to the latex tank is two, the liquid level meter is provided with an upper sensor and a lower sensor which are positioned in the impregnation tank, the upper sensor is fixed at a fifth part of the height from the bottom of the impregnation tank, the lower sensor is fixed at a fourth part of the height from the bottom of the impregnation tank, eight baffles are arranged in the impregnation tank, wherein the No. 3 baffle and the No. 8 baffle are respectively positioned above the two glue inlets and fixed at a seventh height from the left side and the right side of the bottom of the impregnation tank, the lengths of the No. 3 baffle and the No. 8 baffle are respectively one fourth of the length of the impregnation tank, the No. 1 baffle and the No. 2 baffle are respectively fixed at six seventh height and three seventh height from the left side of the bottom of the impregnation tank, the No. 4 baffle and the No. 6 baffle are respectively fixed at six seventh height and three seventh height from the right side of the bottom of the impregnation tank, and the lengths of the No. 1 baffle, the No. 2 baffle, the No. 4 baffle and the No. 6 baffle are respectively one seventh of the length of the impregnation tank, an upper sensor and a lower sensor of the liquid level meter are fixed between a No. 4 baffle and a No. 6 baffle, a No. 5 baffle is fixed on the side surface of the No. 4 baffle and extends downwards to be flush with the upper sensor, the length of the No. 5 baffle is the same as the width of the No. 4 baffle, a No. 7 baffle is fixed on the side surface of the No. 6 baffle and extends upwards to be flush with the lower sensor, and the length of the No. 7 baffle is the same as the width of the No. 6 baffle; the pre-vulcanized latex preparation unit is provided with a temperature-controllable nitrile latex functional auxiliary agent grinding and dispersing device, which comprises a stirring ball mill shell, a screen, metal balls, stirring blades, a motor and a temperature control device, wherein the stirring ball mill shell is of a hollow jacket double-layer structure, the hollow jacket is connected with a circulating water temperature automatic control system through a pipeline, a set of blades are respectively added at two ends of a fixing plate of each stirring blade, the two sets of blades are arranged at the outermost edge of the fixing plate of each stirring blade, and the structural design of the two sets of blades is parallel to a stirring shaft of each stirring blade.
2. The method for producing nitrile rubber latex gloves with stable performance according to claim 1, wherein the automatic circulating water temperature control system comprises a water reservoir, a heat-sensitive probe, a temperature-controlled switch, a filter and a water pump, the water pump is connected with the water reservoir through a pipeline and is connected with a water inlet at the lower end of a hollow jacket of the shell of the stirring ball mill through the filter and the pipeline, a water outlet is arranged at the upper end of the other side of the hollow jacket of the shell of the stirring ball mill and is connected with the water reservoir through a pipeline, and the temperature-controlled switch is connected with the heat-sensitive probe for measuring the temperature of the functional auxiliary agent aqueous dispersion in the ball mill and is also connected with the water pump.
3. The method for producing nitrile rubber latex gloves with stable performance as claimed in claim 1, wherein the temperature of the aqueous dispersion of functional additives in the ball mill is controlled between 25 ℃ and 30 ℃.
4. The method for producing nitrile rubber latex gloves with stable performance as claimed in claim 1, wherein the width and thickness of the eight baffles are respectively four fifths of the width of the dipping tank and one fifteenth of the height of the dipping tank; the diameter of the tail end of the glue inlet pipeline is 150 mm.
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