Epidemic Prevention and Control | Besides 84, these disinfectants may also be used in the daily work of the laundry and dyeing industry
Release Time:
2020-02-17 14:21
Source:
Recently, the disinfection and protection process for resuming work and entering a certain industrial park in Suzhou was captured by a First Financial reporter on Douyin. Its smooth and standardized safety operation left a very deep impression. As the epidemic prevention and control situation becomes increasingly severe, disinfection and sterilization are becoming a daily routine for the general public. So, for the laundry and dyeing industry, how should disinfection and sterilization be properly carried out? Today, the editor will take everyone to understand the disinfectants that may be used in laundry and dyeing work, hoping to provide some reference for industry colleagues.
Daily work in the laundry and dyeing industry
Commonly used disinfectants
Chlorine-containing disinfectants
The main component of 84 disinfectant solution is sodium hypochlorite (NaClO). Because it has both bleaching and disinfecting functions, it has been widely and long-term used by colleagues in the laundry and dyeing industry, especially favored in the field of household clothing washing. Since there has been a special report on 84 disinfectant solution before, this article will not elaborate further. For more information about 84 disinfectant solution, please refer to the February 6 content on the Laundry Vision public account, access path: Laundry Vision homepage - China Laundry - Supply and Demand Information - Today's Hot Topics.
It needs to be emphasized again that everyone must carefully read the instructions for using 84 disinfectant solution and operate safely according to the correct methods and procedures. It should be used cautiously for "wool, silk, and colored" clothing care, as it can easily cause damage to clothing color and fabric!
2. Chlorine Tablets Disinfectant
English name TCCA, this product is a white powder or granule, has a chlorine irritating smell, slightly soluble in water, and easily soluble in acetone.
Main uses: This product is a highly effective organic chlorine disinfectant with an effective chlorine content of over 90%. It features rapid and slow-release effects. As a new type of efficient disinfectant and bleaching agent, it has a wide range of applications and has no adverse effects on the human body. It is commonly used in dry cleaning and bleaching, especially suitable for hospitals, nursing environments, and particularly for bleaching and sterilizing white cotton fabrics.
3. Sodium Dichloroisocyanurate
After dissolving in water, it produces hypochlorous acid with microbicidal activity and can be used as an excellent bleaching and disinfecting agent to kill microorganisms.
Main uses: Sodium dichloroisocyanurate is used in daily chemicals and the textile industry as an additive in dry bleaching agents, bleaching laundry powders, scouring powders, dishwashing liquids, and other detergents, playing a role in bleaching and sterilization. When washing woolen clothes, it can interact with the protein molecules in the wool scale layer, breaking some bonds in the wool protein molecules, thereby preventing shrinkage and pilling.
Convenient to use, requires a small amount, does not harm humans or animals, and does not pollute the environment. These advantages have made sodium dichloroisocyanurate a mainstream bactericide.
4. Calcium Hypochlorite (Ca(ClO)₂)
White powder with a strong chlorine odor. Its solution is a yellow-green translucent liquid.
Main uses: bleaching pulp in the paper industry and bleaching cotton, hemp, and silk fiber fabrics in the textile industry. Also used for sterilization and disinfection of drinking water in urban and rural areas, swimming pool water, etc. Can be used as a wool anti-shrink agent and deodorizer.
Health hazards: The dust of this product irritates the eye conjunctiva and respiratory tract and can cause tooth damage. Skin contact can cause moderate to severe skin damage.
5. Trichloroisocyanuric Acid
An organic compound, white crystalline powder or granular solid, with a strong chlorine gas irritating smell. It is a very strong oxidizer and chlorinating agent.
Contains up to 90% active chlorine. Used as a bleaching agent in the printing and dyeing industry, suitable for bleaching cotton, hemp, wool, synthetic fibers, and blended fibers. It can be a replacement for bleaching powder and bleaching essence. In addition to being widely used as a disinfectant and bactericide, it also has extensive applications in industrial production.
Active oxygen disinfectants
1. Hydrogen Peroxide
The Chinese name is hydrogen peroxide. The aqueous solution is a colorless transparent liquid with a faint special odor. Pure hydrogen peroxide is a pale blue oily liquid. It can mix with water, ethanol, or ether in any proportion. Insoluble in benzene and petroleum ether.
Main uses: It has oxidizing or reducing effects under different conditions and can be used as an oxidant, bleaching agent, disinfectant, and dechlorinating agent. In the laundry and dyeing industry, the usage method should be determined based on the equipment used, bleaching method, fabric thickness, desizing and scouring conditions, and bath ratio.
To minimize fiber damage, a low concentration is preferred. To achieve higher whiteness, measures should be taken during scouring. The use of hydrogen peroxide is related to concentration, time, and temperature. The bleaching effect on fabric increases with the decomposition rate of hydrogen peroxide on the fabric. The "controlled hydrogen peroxide bleaching process" with alkaline stabilizers can achieve good fabric whiteness and impurity removal without causing significant fiber damage. Hydrogen peroxide generally also has strong disinfecting and sterilizing functions.
Hazard: This product is an oxidizer and highly irritating. Inhalation of its vapor or mist strongly irritates the respiratory tract. Direct eye contact with the liquid can cause irreversible damage or even blindness. Oral poisoning symptoms include abdominal pain, chest pain, difficulty breathing, vomiting, temporary motor and sensory disorders, and elevated body temperature. Some cases show visual impairment, epileptic-like convulsions, and mild paralysis. Long-term exposure can cause contact dermatitis.
2. Peracetic Acid
Also known as peroxyacetic acid, it is a colorless liquid disinfectant with a strong irritating odor. It is soluble in water, ethanol, ether, and sulfuric acid.
Main uses: Used for bleaching, as a catalyst, oxidizer, and epoxidation agent, and also as a disinfectant. Mostly used for indoor space disinfection. When disinfecting clothes and bedding, peracetic acid is generally diluted and heated, applied by fumigation, and the environment should have good ventilation.
Hazard: This product is flammable, explosive, strongly corrosive, and highly irritating, causing burns to the human body. It strongly irritates eyes, skin, mucous membranes, and the upper respiratory tract. Inhalation can cause inflammation, edema, and spasms of the throat and bronchi, chemical pneumonia, and pulmonary edema. Contact can cause burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.
3. Sodium Percarbonate
Sodium percarbonate is a strong oxidizer. It appears as white crystals or crystalline powder and releases oxygen when exposed to moisture.
Main uses: Sodium percarbonate is commonly used as an additive in laundry detergents and as the main chemical component in color bleach powders in the dyeing industry. It mainly serves as a bleaching agent and oxidizer with bactericidal functions. It is also used as a detergent, cleaning agent, and bactericide in chemical, papermaking, textile, dyeing, food, pharmaceutical, and sanitation sectors.
When combined with other effective detergent additives, sodium percarbonate can produce high-efficiency detergents or color bleach laundry powders. The production of low-phosphorus or phosphorus-free laundry powders can also be enhanced by adding sodium percarbonate, promoting products toward high-end, non-toxic, and multifunctional directions.
Alcohol-based Disinfectants
The most commonly used are ethanol (commonly known as alcohol) and isopropanol. They coagulate proteins, causing microbial death. They are medium-level disinfectants that kill bacterial vegetative cells and destroy most lipophilic viruses, such as herpes simplex virus, hepatitis B virus, and human immunodeficiency virus.
Main uses: Commonly used at 75% concentration, mainly for hand skin disinfection. It can be used for personal hygiene protection of workers in the washing and dyeing industry during work.
Iodine-containing Disinfectants
Including tincture of iodine and povidone-iodine, they can kill bacterial vegetative cells, fungi, and some viruses. They are used for skin and mucous membrane disinfection, commonly used in hospitals for surgical hand disinfection, and are also suitable for daily protection of washing and dyeing industry workers.
Proper Use Precautions for Disinfectants
1. Since disinfectants are chemical hazardous substances, they should not be overused. During use, strict adherence to instructions and operation procedures is required. Most disinfectants have strong oxidizing ability and can irritate or damage skin and mucous membranes and corrode items at high concentrations. Long-term and excessive use can cause microorganisms to develop resistance, greatly reducing sterilization effectiveness.
2. For indoor sterilization and disinfection, choose a certain concentration of peracetic acid or hydrogen peroxide spray disinfection, or use ozone air disinfectors. Ensure good ventilation during disinfection.
3. Before using disinfectants, thoroughly remove organic matter such as garbage residues, secretions, shed skin, and other dirt from the environment. Organic matter harbors many pathogenic microorganisms that consume or neutralize the active ingredients of disinfectants, reducing their effective concentration against pathogens.
4. To prevent pathogenic bacteria from developing resistance, disinfectants should be rotated.
5. Operators using disinfectants should have personal protection awareness, strengthen hand cleaning and disinfection, wash hands with running water, and use quick hand disinfectants when necessary. Preventive disinfection workers should use level one protection, choosing disposable surgical masks, work clothes, and disposable rubber (or nitrile) gloves.
6. Disinfectants have certain toxicity and irritancy; personal protection should be observed during preparation and use. Disinfectants are also corrosive; after disinfection, wipe with clean water to prevent damage to items.
7. Disinfectants used must be products produced by regular enterprises that comply with relevant Chinese regulations and must be used within the validity period. All disinfectant production requires a health permit issued by provincial administrative departments and a health permit document issued by the Ministry of Health.
8. When purchasing disinfectants, pay attention to whether the label indicates the following:
(1) Product health permit number, formatted as Wei Xiao Zi (year) No. XXXX or Wei Xiao Jin Zi (year) No. XXXX;
(2) Name and address of the manufacturing enterprise;
(3) Manufacturing enterprise health permit number (except imported products), formatted as (province, autonomous region, or municipality abbreviation) Wei Xiao Zheng Zi (year of issue) No. XXXX;
⑷ Name of the country or region of origin (excluding domestic products);
⑸ Main active ingredients and their content;
⑹ Production date and expiration date;
⑺ Scope of use and usage method.
Source materials of this article: ① Baidu Encyclopedia
② Douyin
③ Hotel Linen Network
④ Dalian Youbang Laundry Co., Ltd.
Compiled and reported by "China Laundry"
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