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Is polyvinyl alcohol harmful?

Is polyvinyl alcohol harmful?

After more than 40 years of development, China's polyvinyl alcohol PVA industry has become the world's largest PVA producer, with technical routes such as petroleum ethylene method, natural gas acetylene method and calcium carbide acetylene method. Do you know polyvinyl alcohol? Have you ever worried about its safety? This article will introduce its safety and storage issues in detail.


(1) The meaning of polyvinyl alcohol

Polyvinyl alcohol (also known as PVA, PVOH or PVAI) is a synthetic polymer that is composed of many molecules strung together. It begins with the life of ethylene (ethylene), which is a natural gas hormone released by plants that can promote fruit ripening. In this case, ethylene is artificially synthesized (but with the same properties), and then converted into vinyl acetate by a chemical reaction with oxygen and acetic acid (known as the diluted form of vinegar), then polymerized (combined to form repeating molecules) and then When dissolved in alcohol, it becomes a water-soluble polymer.

From reinforcing textile yarns and making paper more grease resistant to making children's play mud and contact lens lubricant (yes, it is safe enough to get into your eyes), polyvinyl alcohol has many uses. We use it to create water-soluble, single-size pod packaging that can hold dishwashers, oxygenates and washing powders, and more.

 

(2) Distinguish between polyvinyl alcohol and polyvinyl acetate

Polyvinyl alcohol is sometimes confused with polyvinyl acetate (also known as PVA or PVAc-wood glue). It is a common mistake because sometimes the same acronym is used. Polyvinyl alcohol is sometimes considered to be related to polyvinyl chloride (also known as polyvinyl chloride-toxic plastic). What we want to show is that even though they both contain the term "polyvinyl" and are all types of polymers, they are indeed very different substances.

Polyvinyl alcohol = non-toxic, biodegradable polymer

Polyvinyl acetate = rubber-like polymer, usually used as glue

Polyvinyl chloride = toxic plastic polymer, usually containing phthalates and heavy metals

In addition to PVA, our company also provides PVB related products.

 

(3) Is polyvinyl alcohol dangerous?

Inhalation and ingestion of polyvinyl alcohol are harmful to the body and irritating to the eyes. Polyvinyl alcohol is a kind of explosive dangerous goods. Flammable and irritating. Its powder and air can form an explosive mixture. When it reaches a certain concentration, it will explode when it encounters sparks. Thermal decomposition will also produce flammable gas.

If it comes in contact with the skin, please quickly remove contaminated clothing and rinse with running water.

If your eyes come into contact with polyvinyl alcohol, please lift your eyelids immediately and rinse with running water or normal saline. Seek medical attention. If you accidentally inhale it, please drag it away from the scene to a place with fresh air. If breathing is difficult, give oxygen and seek medical advice promptly. Please drink plenty of warm water if accidentally swallowed to induce vomiting. Seek medical attention.

Therefore, use explosion-proof ventilation systems and equipment to store polyvinyl alcohol. Avoid generating dust. Avoid contact with oxidants. Store in a cool, ventilated warehouse. Keep away polyvinyl alcohol from fire and heat sources. should be kept away from oxidizer, do not store together. Equipped with the appropriate variety and quantity of fire equipment. The polyvinyl alcohol storage area should be equipped with suitable materials to contain the leakage. When handling, load and unload with care to prevent damage to packaging and containers. Equipped with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment.

 

 

 


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