Preparation method and process of nitrile gloves

- Jun 19, 2020-

Background technique:


As the precision requirements of high-tech products increase, more and more products are required to be produced, packaged and tested in a dust-free environment. Therefore, operators need to wear special dust-free clothing and accessories to ensure a clean environment. As an important part of dust-free clothing and accessories, gloves are widely used in clean rooms, which can not only protect products and production areas from pollution, but also protect operators from harmful ingredients in the production process. Among them, nitrile gloves have many advantages such as adhesion, good ductility and no proteinogen, and are not sensitive to allergies.


At present, there are many varieties of nitrile gloves. Nitrile gloves are mainly made by impregnating nitrile latex, molding, vulcanization, surface treatment, dust-free cleaning and other processes. They have excellent puncture resistance, chemical resistance, friction resistance and Long-lasting wearability. Chlorine washing is generally required during the removal of the nitrile gloves after molding to remove the tackiness of the glove surface and facilitate the wearing of the gloves. However, this will increase the chlorine content in the nitrile gloves. When the glove is in the specific process operation, the glove will penetrate a small part of the chlorine element, which affects the accuracy of the operation; in addition, the dust particles will adhere to the surface of the nitrile gloves during preparation, and the performance of the product will be treated when the dust particles fall. Big influence, so the cleanliness of nitrile gloves also needs to be strictly controlled.


Technical realization elements:


In view of the shortcomings of the prior art, the object of the present invention is to provide a method for preparing nitrile gloves. The nitrile gloves prepared by this method have low chlorine content and high cleanliness.


To achieve this goal, the present invention adopts the following technical solutions:


A method for preparing nitrile gloves includes the following steps:


1) Preparation of latex materials for nitrile gloves;


2) Acid wash, first wash, alkaline wash and second wash and dry the hand mold;


3) Put the hand model cleaned in step 2) in the chlorine washing solution and wash it with chlorine;


4) Put the hand mold after the chlorine washing in step 3) into the coagulant solution for dipping;


5) Put the hand mold after immersion in step 4) into the latex material of nitrile gloves prepared in step 1);


6) Wash the film after dipping in step 5) with pure water, dry it in DI water and dry it again;


7) After the mold film cleaned in step 6) is demolded, nitrile gloves are prepared.


Nitrile latex is made by copolymerization of butadiene and acrylonitrile emulsion. Because the copolymer molecular chain contains nitrile groups, it has good oil resistance, solvent resistance and chemical resistance. It is used to improve wet gel and vulcanized rubber. The cohesive strength and physical mechanical properties of the nitrile latex are copolymerized by introducing third-party monomers such as carboxyl groups during copolymerization. Commonly used carboxyl monomers include acrylic acid and methacrylic acid. Carboxylic nitrile latex can significantly improve the mechanical stability, oil resistance and aging resistance of the latex.

surgical nitrile glove dipping machine

Compared with the prior art, the beneficial effects of the present invention are: the preparation method of the nitrile gloves of the present invention only performs chlorine washing once, and the chlorine washing is performed before dipping the hand mold, that is, dipping the hand mold Before hand washing the hand model with chlorine, the surface of the nitrile gloves formed after dipping is smooth, which is convenient for wearing and does not stick, and only undergoes chlorine washing once, which greatly reduces the chlorine content of the nitrile gloves and simplifies the processing procedure ; At the same time using DI water cleaning, effectively remove the particles and surface ions on the surface of nitrile gloves, increasing the cleanliness of nitrile gloves.


In addition, the anti-static agent is added to the raw materials for the preparation of nitrile gloves, so that the nitrile gloves have good anti-static performance, which meets the requirements of anti-static gloves in the laboratory.

Technical characteristics:

1. A method for preparing nitrile gloves, characterized in that it includes the following steps:


1) Preparation of latex materials for nitrile gloves;


2) Acid wash, first wash, alkaline wash and second wash and dry the hand mold;


3) Put the hand model cleaned in step 2) in the chlorine washing solution and wash it with chlorine;


4) Put the hand mold after the chlorine washing in step 3) into the coagulant solution for dipping;


5) Put the hand mold after immersion in step 4) into the latex material of nitrile gloves prepared in step 1);


6) Wash the film after dipping in step 5) with pure water, dry it in DI water and dry it again;


7) After the mold film cleaned in step 6) is demolded, nitrile gloves are prepared.


2. The preparation method according to claim 1, wherein in step 3), the chlorine washing solution is chlorine water.


The preparation method according to claim 1, characterized in that, in step 3), the mass concentration of the chlorine washing solution is 2.7 to 3.8%, the number of times of the chlorine washing is one, and the The time is 20~30min.


4. The preparation method according to claim 1, wherein in step 6), the conductivity of DI water is less than 6.6 μs/m, and the resistance value is greater than 15 mΩ.


The preparation method according to claim 4, characterized in that the number of DI water washing is 2 times, and each washing time is 20-30 minutes.


The preparation method according to claim 1, wherein in step 4), the coagulant solution is a calcium nitrate solution or a calcium chloride solution with a mass concentration of 3 to 5%.


The preparation method according to claim 1, characterized in that, in step 1), the raw material of the latex of the nitrile glove comprises 30 to 60 parts of the nitrile latex and 0.5 to 1 part by weight parts Potassium hydroxide, 30-50 parts deionized water, 0.1-2 parts sulfur, 0.5-2 parts zinc oxide, 0.1-0.5 parts accelerator, 1-2 parts antistatic agent, 0.1-0.3 parts Anti-aging agent, 1 to 2 parts of stabilizer, 0.1 to 0.3 parts of titanium dioxide, 1 to 2 parts of defoamer.


8. The preparation method according to claim 1, wherein the chlorine content in the nitrile gloves is less than 900 ppm.

Technical summary

The invention discloses a method for preparing nitrile gloves, which relates to the technical field of nitrile gloves. The preparation method of the nitrile glove of the present invention includes preparing the latex material of the nitrile glove, pickling the hand mold, the first water wash, the alkaline wash, the second water wash, drying, the hand mold chlorine washing, and the hand The steps of immersing the mold in the coagulant solution, dipping the hand mold, cleaning the adhesive film, and releasing the adhesive film. The preparation method of the nitrile glove of the present invention only performs chlorine washing once, and the chlorine washing is performed before dipping the hand mold, that is, the hand mold is first washed with chlorine before dipping the hand mold, so as to form after dipping The surface of the nitrile gloves is smooth, which is convenient to wear and does not stick, and the processing procedure is simplified, which greatly reduces the chlorine content of the nitrile gloves; while using DI water to clean, the particles and surface ions on the surface of the nitrile gloves are effectively removed. Increased the cleanliness of nitrile gloves.