What is PVA Cold Water Soluble Films?
PVA polyvinyl alcohol is a water-soluble material. It can be used to make a kind of pollution-free, non-toxic water soluble bag. PVA water soluble films can be dissolved in water, the formation of adhesive liquid can gradually penetrate into the soil, increase the soil group adhesion, permeability and water retention, very suitable for soil transformation. In soil, PVA polymers are easily decomposed by strains and eventually degraded into water and carbon dioxide (H2O and CO2). Due to its complete water solubility and biodegradability, it is truly environmental protection product.
PVA cold water soluble films not only inherit some excellent properties of ordinary plastic films, but also have the characteristics of environmental protection . And they are easy to degradate like paper bags, which can definitely be called the most environmentally friendly bag!
Due to the difference in water dissolution temperature, PVA water soluble films are often divided into cold water water soluble films and hot water soluble films. In this blog, we will discuss some topics about cold water soluble films.
What are the advantages of cold water soluble films?
safe and non-toxic
Water-soluble film is safe and non-toxic, non-irritating, easy to degrade. Dissolved in water, the final degradation products are carbon dioxide and water, which can be excreted by metabolism after absorption by the human body.
Environmental protection and easy to dissolve
Water soluble film is colorless transparent or colored opaque (transmittance adjustable) . And cold water soluble film/bag can completely dissolves in water (5℃-30℃) within 2 minutes . While in water above 30℃, it will completely dissolves within 50 seconds. Therefore, the contents of the films or bags can be quickly released, so that the effective ingredients can play a role quickly. In addition, the solution is neutral after dissolution, and the composition has no pollution to the environment, which is an environmentally friendly product.
Oil resistance and corrosion resistance
Water-soluble film is not dissolved in ost organic solvents (such as benzene, xylene, etc.) and all animal oils, vegetable oils and petroleum hydrocarbons. But it can be dissolved in glycerol, ethylene glycol, amide, triethanolamine and ethanolamine salt and dimethyl maple.
Good antistatic
Water-soluble film is a kind of anti-static film, different from other plastic films, has good anti-static property. In the process of using water-soluble film packaging products, their plasticity will not be reduced because of static electricity.
Good elastic tensile strength
When the thickness of the water-soluble film is 0.03-0.05mm, its tensile strength is 100-300 kg/cm2, elongation is 10-600%, and hardness is less than 10. Because the film has good flexibility, it can be made into various sizes of packaging.
Accurate measurement
Water-soluble film has unique elastic modulus and tensile strength, so that it has a high mechanical automatic packaging performance. So it is suitable for a variety of automatic filling machines, can improve the accuracy of the dose.
Strong heat sealing
Water-soluble packaging film has good heat sealing. Its heat resistance temperature is up to 140℃, suitable for resistance heat sealing and high frequency heat sealing.
Breathable oxygen resistance
Water-soluble film has strong permeability to water and ammonia, but has good barrier property to oxygen, nitrogen, hydrogen and carbon dioxide gas. These characteristics make it possible to maintain the composition and original smell of the packaged product in good condition. Which can well protect the activity of the contents and improve the effective utilization rate of pesticides.
Clear printing
It can print a variety of required color patterns on the water-soluble film through ink, it has good printability.
What are the Usages of the of Cold Water Soluble films ?
Packaging films
The films can be used to pack pesticides, cement additives, pigments, fuels, fertilizers, laundry detergent and so on. Compared to traditional films, PVA Water-soluble filmS can reduce environmental pollution, improve the working environment, but also achieve accurate measurement, reduce waste.
Embroidery interlining films
They can be used as a temporary carrier for computer embroidery and wig production.
Water transfer printing films
The films can be used for the transfer of trademarks and patterns on the shaped surfaces of ceramics, plastics, metals and wood items.
Seed Packaging bags
It is a good way to us water-soluble PVA film to make crop seed packaging bags, when burying them in the soil, the seed packaging bags will dissolve when it meets the water in the soil and is distributed around the seed. Which can improve the water retention of the soil and is conducive to the germination and growth of the seed.
Where to buy cold water soluble films and how to store them?
You can buy cold water soluble films from us. You can custom your cold water soluble films in size , printing , dissolving temperature as per your needs.
And if you don’t use the films temporarily, they should be stored in a dry place and keep them sealt well .
If you need to purchase water soluble films or other eco-friendly products, please contact us. (www.customizepacking.com)
