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The present invention relates to a method for manufacturing rubber gloves containing Nano silver, and more specifically, by uniformly dispersing colloidal silver particles in a solution of natural rubber latex for the manufacture of rubber gloves. , which is characterized by excellent antibacterial and deodorizing properties. It involves a method of manufacturing rubber gloves containing silver nanoparticles.
This invention is distinguished by uniformly dispersed silver particles in rubber gloves by mixing colloidal silver by adding polyvinyl pinolidon with excellent dispersibility to silver nanoparticles in a solution of natural rubber latex. . That’s an advantage it offers. can produce latex gloves with effective antibacterial and deodorizing properties as well as exhibiting excellent rubber properties.
DESCRIPTION
Production method of rubber gloves containing Nano silver
1 is a process diagram of the method for manufacturing rubber gloves containing silver nanoparticles according to the present invention.
The present invention relates to a method for manufacturing rubber gloves containing silver nanoparticles, and more specifically, by uniformly dispersing colloidal Nano silver in a solution of natural rubber latex for the manufacture of rubber gloves. , which is characterized by excellent antibacterial and deodorizing properties. It involves a method of manufacturing rubber gloves containing silver nanoparticles.
In general, when housewives wear rubber gloves, the sweat from their hands is not discharged to the outside of the rubber gloves, and since air does not pass through them, not only eczema is caused by mold. inside rubber gloves caused. In case of continuous use, the inside of the rubber glove will produce an odor.
As a result, several patents have been filed to address these issues, United States Patent Publication No. 3,740.262 of these patents for removing moisture inside latex gloves and transmitting ability to breathe through powder through surgical gloves. to solve the problem and Publication of Korean Extended Patent No. 2000-13781 relating to rubber gloves provided with antibacterial function by adding organic acid zinc to polyurethane rubber gloves dispersed in water, or the organic acid zinc itself is irritating to the skin.
It is a harmful substance and the rubber gloves of Korean Patent Publication No. 186936 have the function of anti-bacterial by containing chitosan powder in latex gloves and rubber gloves of the Patent Publication of Korea No. 2004-96930 containing silver nanoparticles in rubber gloves. Although patents have been granted for antibacterial properties, since chitosan powder particles or silver nanoparticles, which are film-forming agents, cannot be mixed in a viscous natural rubber latex solution, the particles cannot be uniformly distributed in molded rubber gloves.
Therefore, the present invention solves the above problems by mixing a dispersant in a solution of natural rubber latex to produce rubber gloves, uniformly dispersing colloidal silver particles with sizes from 1 to 100 nm, the silver particles represents the invention to provide a method of manufacturing rubber gloves containing Nano silver, which feature molded rubber gloves with excellent antibacterial and deodorizing properties.
Hereafter, this invention will be described in detail.
Latex gloves containing Nano silver of the present invention are prepared by conventional methods, such as the manufacturing process shown in Fig.
i) dry the mold in brine with salinity of 12 to 18 degrees for 5 to 15 seconds and then dry (primary brine process);
ii) soak the brine mold from the primary mold into latex for 10 to 30 seconds and then dry (primary latex dipping process);
iii) soak the mold in brine with a salinity of 10 to 20 degrees for 5 to 20 seconds and then dry (secondary brine process);
iv) immerse the mold in second brine for 10 to 50 seconds and dry (secondary latex dipping process);
v) vulcanizing and drying rubber gloves dislodged from the mold (vulcanization drying step);
vi) washing rubber gloves with a mixed acid solution in which water, hydrochloric acid and hydrochloric acid are mixed in a weight ratio of 1,000 to 5 to 2 (acid washing procedure);
vii) acid-washed latex gloves with an alkaline solution mixed with water and caustic soda in a weight ratio of 1,000 to 2 (alkaline washing procedure);
viii) silicone oil softener treatment after water washing and drying (softener treatment step);
Latex gloves containing Nano silver are prepared.
The present invention is generally through first brine step, first latex dipping step, second brine dipping step, second latex dipping step, vulcanization drying step, acid washing step, alkaline washing step and curing agent step. soft then wash. In the production method of rubber gloves produced by the phosphorus process,
Primary natural rubber latex used in the process of soaking primary latex is prepared by mixing 93.5 to 95.3% by weight of natural rubber latex, 4.5 to 6.0% by weight of sulfur. , 0.2 to 0.5% by weight of watercolor powder,
The secondary natural rubber latex used in the secondary latex soaking process is homogeneously mixed with 90.0 to 93.3% by weight of natural rubber latex, 4.5 to 6.0% by weight of sulfur. , 2.0 to 4.0% by weight of dispersant and 0.2 to 0. there.
Natural latex used in primary and secondary natural latex solutions using stabilized natural rubber latex from 0.04 to 0.08% weight based on high latex natural rubber.
The natural rubber latex used in the present invention is given priority in the case of the primary natural rubber latex solution from 93.5 to 95.3% by weight, the secondary natural rubber latex solution having from 90.0 to 93.3% by weight. When the use content of primary and secondary natural rubber latex is less than the lower limit of the above-mentioned usage content, respectively, due to the lack of content, softness is accompanied by a decrease in physical properties such as tensile strength and elongation, which are inherent to the properties of rubber. If the induction potential is lowered and the upper limit of the amount used is exceeded, the potential for mold will be reduced by excessive use of natural rubber latex and there may be concerns that the physical properties of rubber is reduced.
In the above sulfur, as a vulcanizing agent for vulcanizing natural rubber latex, the best used content is 4.5 to 6.0% by mass, but if the content is less than 4.5% by mass, it is not. enough vulcanization. If it exceeds 6.0% by weight, the rubber becomes stiffer because it is over-vulcanized and the inherent physical properties of elastic rubber are reduced.
In addition, water colorants or titanium dioxide are colorants added to color rubber gloves, their content is preferably 0.2 to 0.5% by weight. Colorants are not defined as the absolute amount of the amount added, but as colorants can give a suitable color within the range of the amount used. In addition, the aqueous colorant may be used in the present invention without special limitations, and may be used as a colorant to match the desired color of the consumer.
Dispersant is to evenly disperse colloidal silver added to the secondary natural latex solution, the best amount is 2.0 to 4.0 wt%. When their content is less than 2.0% by mass, the dispersion is reduced, leading to colloidal silver particles not evenly dispersed in the natural rubber latex solution and even when the content exceeds 4.0%. mass, the dispersion is not particularly improved. Since the dispersant can be used in the present invention, it is preferable to use polyvinylpyrrolidone.
In the present invention, colloidal silver is a colloidal state in which the Nano silver are in a colloidal state, and serves to improve the antibacterial and deodorizing properties, and the size of the silver particles has an important influence. to dispersibility. The sizes of colloidal silver particles used in the present invention are preferably from 1 to 100 nm. When the colloidal silver particle size is less than 1 nm, the dispersion force increases, but the cost of nanoparticles increases, so the economic efficiency is low. When the colloidal silver particles are larger than 100 nm, the mixing with the latex is unstable and the dispersion is uneven. Be lowered. In addition, the amount of Nano silver added to the secondary natural latex solution is preferably between 20 and 100 ppm. When the amount of colloidal silver particles is less than 20 ppm, the antibacterial activity will decrease. Although the colloidal silver content increased, the antibacterial activity was no longer improved, and the physical properties of rubber gloves were reduced.
And since the stabilizer is an unstable state, where natural rubber latex is a heterogeneous suspension in which a mixture of polymers and water is mixed, it stabilizes to alkali by adjusting the pH of the latex. natural latex solution, which helps to prevent the solidification of the natural latex solution. As for their content, their best use is 0.04 to 0.08% by weight. If the amount is less than 0.04% by weight, the natural rubber latex solution may not be alkaline enough, which can cause the solution to solidify. If the amount is more than 0.08% by mass, the natural latex solution may have too high a pH. There is a risk of losing the inherent viscosity of the solution. As an alkalizing agent that can be used in accordance with the present invention, potassium hydroxide takes precedence.
In the following, the invention will be detailed by examples.
(Example 1 to 3)
Primary natural rubber latex is processed by mixing 1000 kg of natural rubber latex containing 0.5 kg of potassium hydroxide, 50 kg of sulfur, 3.5 kg of water-based blue pigment (ss-610, material industry). garden material).
Secondary natural rubber latex is homogenized with 1000 kg of natural rubber latex containing 0.5 kg of potassium hydroxide, 50 kg of sulfur, 30 kg of polyvinylpynolidone and 3.5 kg of titanium dioxide, the particle size is 20 nm. 50 ppm colloidal silver (Korea Bio Plus Co., Ltd.) was added, and then prepared by homogenizing mixing.
Using primary and secondary natural rubber latex pretreated in conventional rubber gloves containing nano-silver according to conventional methods, three types were sampled.
(Comparison examples from 1 to 3)
Comparative examples 1 to 3 were prepared using the same method as the primary and secondary natural rubber latex solutions prepared in examples 1 to 3, but with polyvinylpynolidon as the dispersing agent. canopy was added to the secondary natural rubber latex solution. It is prepared by adding the same amount of colloidal silver when it is not present.
Then, using the above prepared primary and secondary natural rubber latex, after preparing rubber gloves containing silver nanoparticles according to the usual method, three types were taken as samples.
The results of measuring the antibacterial and deodorizing capabilities as well as the rubber properties of Examples 1 to 3 and Comparative Examples 1 to 3 prepared as described above are presented in Table 1 below.
| Classify | Example | Contrasting example | |||||
| 1 | 2 | 3 | 1 | 2 | 3 | ||
| Antibacterial activity (%) | E.coli | 99.92 | 99.93 | 99.92 | 84.37 | 84.53 | 78.45 |
| Staphylococcus aureus | 99.93 | 99.94 | 99.91 | 82.98 | 83.49 | 79.62 | |
| Deodorizing power | 0 | 0 | 0 | 1 | 2 | 2 | |
| Tensile (N / m) | 5,903 | 5,872 | 5,897 | 4,871 | 4,892 | 4,886 | |
| elongation (%) | 621.5 | 618.7 | 623.2 | 498.7 | 489.9 | 493.5 | |
(Measurement method)
1) Antimicrobial assessment: Escherichia coli, Staphylococcus aureus
Incubate E. coli and Staphylococcus in a common incubator at 35 °C. for 16-20 h, dilute the culture solution 20,000 times with sterile phosphate buffer, and add 1 ml to the samples cut to length 2 cm x 2 cm, and then at 25°C. Remove after 24 h of storage. The cells were then incubated again for 48 h in sterile agar and irradiated with agar plate culture (35°C, 2 day culture) to measure the number of viable cells. And the sterilization rate (%) is calculated according to the following formula.
Sterilization rate (%) = [(number of viable bacteria after -24 hours of diluent storage) / number of live bacteria of diluent] × 100
2) Deodorization ability: The inside of rubber gloves used for 30 days, soaked in 40 ± 5 hot water for 2 hours a day, included 5 healthy people with normal sense of smell by direct sensory method and many odors detected detected by each judge detected. Apply a scent level.
| Odors | Classification of the ability to perceive odors | Explanation |
| 0 | Odourless | Can’t be perceived with the sense of smell |
| 1 | Smell detection | I don’t know what it smells like, but I can feel it |
| 2 | Medium smell | The extent to which you can tell what smells |
| 3 | Strong smell | The odor state is strong enough to be easily detected |
3) Tensile strength and elongation: According to KS M 6782. The test piece used test piece number 4 of KS M 6782, and extracted | is collected and used on the smooth surface of the hand of a glove.
Tensile Strength LB = FB / B
Where L B: Tensile Strength (N/m)
F B: Maximum load (N)
B: butterfly of test piece (cm)
Elongation E B = (L 1 -L0) / L0
Where E B: Elongation (%)
L 1: Scale distance (mm)
L 0: Distance between the scales of the cutting plane (mm)
As shown in [Table 1], both Illustrative and Comparative examples have been shown to affect antibacterial and deodorizing capabilities because silver nanoparticles are contained in latex gloves, but namely Examples 1 to 3 The addition of polyvinylpinolidon as a dispersant results in the silver nanoparticles being uniformly dispersed in the rubber gloves, thus having superior antibacterial and deodorizing effects compared to Example compared comparison 1 to 3. On the other hand, the comparative examples are worse in antibacterial and deodorizing properties than the examples due to the uneven distribution of the silver nanoparticles in the latex gloves because the dispersant is not added. when mixing colloidal silver with natural rubber latex. It is thought that this is because the particles are aggregated and contained in a particular part.
In addition, Examples 1 to 3 were found to have excellent tensile strength and elongation, which are general properties of rubber, compared with Comparison Examples 1 to 3, which are uniformly distributed in the glove. rubber hand as described above. Seems to be due.
According to this invention, by adding polyvinylpinolidon with excellent dispersibility to colloidal silver to a solution of natural rubber latex, silver nanoparticles are mixed so that the latex gloves are uniformly contained within the latex gloves. It is an advantage to be able to produce latex gloves that can exhibit excellent antibacterial and deodorizing performance, as well as excellent rubber properties.
Source: Patent KR100665719B1
