PVA water-soluble film, or polyvinyl alcohol film, is a green packaging material that can solve the world’s “white pollution” problem. It has other special properties and is widely used. The market is vast, and it has received wide attention worldwide.
The primary raw material of PVA water-soluble film is polyvinyl alcohol. As a new concept of environmental protection packaging materials, PVA water-soluble film is widely used in water-soluble chemical product packaging bags in Europe, America, Japan, and other countries. For example, it can be used as packaging bags for pesticides, fertilizers, fuels, cleaning agents, water treatment agents, minerals, detergents, concrete additives, photographic chemicals, and garden care chemicals. Furthermore, it can be used as plant seed bags, clothing bags, food and hospital washing bags, and other products inside and outside packaging bags.
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Advantages of PVA water soluble film
1. Safe and non-toxic
Water soluble film is safe, non-toxic, non-irritating, and easy to degrade. After dissolving in water, the final degradation products are carbon dioxide and water, which can be absorbed by the body and excreted through metabolism.
2. Environmental protection and easy-to-dissolve
Water-soluble film is colorless and transparent and can quickly dissolve in water. After dissolving, the contents of the film packaging are released, so the effective ingredients can quickly play a role. Still, after the film is dissolved, the solution is neutral, and its composition is pollution-free to the environment. So, it is an environmentally friendly product.
3. Oil resistance, corrosion resistance
Water-soluble film is insoluble in most organic solvents (such as benzene, xylene, etc.) and all animal oils, vegetable oils, and petroleum hydrocarbons, but soluble in glycerol, ethylene glycol, amide, triethanolamine, as well as ethanolamine salt and dimethyl maple.
4. Anti-static
Water-soluble film is an anti-static film, which is different from other plastic films and has good anti-static performance. So, the water-soluble film packaging products, in the process of use, will not cause the plastic and electrostatic dustproof performance to decline due to static electricity.
5. Elastic tensile strength
Water soluble film thickness 0.03-0.05mm, tensile strength 100-300 kg/cm2, elongation 10-600%, hardness less than Shore hardness 10. Due to the excellent flexibility of the film, it can be made into various sizes of packaging, arbitrary packaging, convenient bag making, and simple processing.
6. Accurate measurement
The unique elastic modulus and tensile strength of the water-soluble film give it a high mechanical automatic packaging performance, suitable for various automatic filling machines, improving the accuracy of the dose.
7. Strong heat sealing
Water-soluble packaging bag has good heat sealing performance, heat resistance temperature up to 140℃, suitable for resistance heat sealing and high-frequency heat sealing.
8. Air permeability and oxygen resistance
Water soluble film has strong permeability to water and ammonia. It has good barrier properties to oxygen, nitrogen, hydrogen, and carbon dioxide gas. These characteristics enable it to maintain the composition and original odor of the packaged product, protect the activity of the contents, and improve the effective utilization rate of pesticides.
9. Clear printing
It can print patterns of various colors on the film’s surface through ink, and the printing adaptability is good.
Application of PVA water-soluble film
1. Agriculture and chemical industry
(1) Inner lining bag for pesticide and chemical products.
The bags and products are dissolved directly in water to avoid direct contact with pesticides and chemical products. Compared with traditional plastic bags, there is no pesticide residue in plastic bags, and the effective use of pesticides or chemicals is realized.
(2) Seed bags.
The seeds are buried in the ground after regular packing, saving valuable seeds and eliminating the busy thinning.
PVA polyvinyl alcohol film is a water-soluble material used as the inner packaging. It is a pollution-free, non-toxic, water-soluble bag. Immediately dissolved in water, it forms a colloidal liquid that can gradually penetrate the soil, increasing the soil group adhesion, air permeability, and water retention. This makes it very suitable for soil reform. PVA polymer is easy to decompose by bacteria in the soil. It eventually degrades into water and carbon dioxide (H2O and CO2). It is a green environmental protection product with complete water solubility and biodegradability.
2. Construction Industry
Cement additive packaging: Due to the water solubility of the packaging bag, people can use the additives directly without opening the packaging. Especially where it needs to add glass and basalt fiber, it cannot only avoid dust flying harmful to the environment. It can also improve its tensile limit strength, which can be increased by 30 ~ 50%. Therefore, using water-soluble bag packaging is the most convenient and reasonable way. Moreover, a small amount of PVA in concrete also increases bond strength.
3. Textile industry
Embroidery, wig, and other fabric carriers: As a carrier, easy to clean.
4. Building materials industry
Release films: They are used as a sizeable artificial marble release film. The artificial marble release film is used in the production process of artificial marble as a release film.
5. Healthcare
Laundry bags for Hospital or Laundry room: Using water-soluble laundry bags, Cleaning personnel do not need to contact contaminated clothing directly to avoid cross-infection.
6. Daily chemical industry
Liquid detergent packaging: Laundry detergent contains highly concentrated cleaning and care ingredients with an extremely low water content. It doesn’t need to be measured. Just one bead easily cleans 6 to 14 dirty clothes. With its convenient use and efficient decontamination ability, laundry detergent quickly became popular, and the market grew steadily.
At present, according to the industry standard of laundry detergent, the active substance content of 15% to 25% in laundry detergent is called ordinary type, 25% to 30% is called concentrated type, more than 30% can be marked with the “concentrated detergent” sign, more than 45% can be marked with the “concentrated +” sign, and the active substance content in laundry beads is generally more than 45%.
As a “third-generation laundry technology,” laundry condensation beads are far more convenient than laundry detergent and powder and have certain cleaning advantages. Their effective cleaning ingredients are generally higher than the national standard laundry detergent formula, and their cleaning strength is better than traditional laundry products. Also, they combine several ingredients into one.
7. Packaging industry
It can used as Supermarket shopping bags and garbage bags;
Because of its good antistatic properties, it is also often used in packaging electronic products.
8. Printing
Water transfer films: After printing on the film, the printing can be transferred to the curved surface.
Classification of PVA water-soluble films
1. Normal temperature water soluble film
- (also known as instant film, cold water soluble film)
Dissolution temperature: 15-30 degrees
Break time: Around 30 s
Complete dissolution time: about 2 minutes
Application: Used for garment embroidery base material, agricultural seed bags, herbicide packaging, cleaning supplies packaging, detergent and other disposable packaging bags.
2. Medium temperature water soluble film
Dissolution temperature: about 45-60 degrees
Break time: Around 20s
Complete dissolution time: about 2 minutes
Uses: infectious medical cloth laundry bag, pet poop bag, etc
3. High temperature water soluble film
Dissolution temperature: above 70 degrees
Cracking time: about 30s
Complete dissolution time: about 3 minutes
Application: supermarket shopping bag, artificial marble release film, etc.
Conclusion
n conclusion, PVA water-soluble films offer many benefits to businesses and individuals. Their enhanced properties, such as water solubility and flexibility, make them attractive for food packaging and other applications. Moreover, they have some health, safety, and convenience benefits.
The essential advantage of PVA water-soluble films is that they are highly biodegradable and non-toxic, making them an environmentally friendly choice. It is also very flexible, allowing various shapes and sizes to meet any need.
Overall, PVA water-soluble films offer many benefits to businesses and individuals. Their enhanced properties make them attractive for food packaging and other applications. They are also environmentally friendly, as they are highly biodegradable and non-toxic. Their solubility and flexibility also make them ideal for a variety of applications. Therefore, whether you are looking for an environmentally friendly packaging option or a reliable solution for medical or industrial applications, PVA water-soluble films are a good choice.
