U.S. Film Connaught developed a new polyvinyl alcohol water-soluble film M-8900

China Packaging Network compiled: MonoSol, LLC USA's newly developed water-soluble polyvinyl alcohol (PVOH) film M-8900, suitable for packaging a range of products including acidic and strong alkaline chemicals. Previously water-soluble polyvinyl alcohol (PVOH) films were not suitable for low pH products. Now the M-8900 overcomes this difficulty, allowing such products to also have water soluble film sizing and thicknesses from 111⁄42. To 3 mil (thousandths of an inch). It also provides stability due to boron compounds.

MonoSol, LLC USA is a leading global manufacturer of specialty water-soluble packaging films. There are many different types of packaging products. MonoSol is certified to ISO 9001:2000. Here are a few common questions about water soluble films:

1. Why are there many varieties of packaging film?

To cope with the packaging of many different types of products, MONOSOL's packaging film also uses different formulations and components, such as PVOH resin, plasticizers and so on. Products with different compatible properties, after proper testing, must have one (or more) film suitable for your product.

2. Is PVOH film biodegradable?

can. It has been found that more than 50 microorganisms (bacteria, yeasts, and molds) can be degraded in PVOH, which is present in fertilizers, soils, and waste water. PVOH membranes will be quickly degraded and digested by active microorganisms in wastewater after they are dissolved. The traditional wastewater treatment process will contain slime that uses active microbes that are degraded by suitable polyvinyl alcohol.

3. How does humidity affect the PVOH film?

Polyvinyl alcohol is produced using a water-absorbing polymer and plasticizer, so it is hydrophilic - PVOH film absorbs moisture in moist air and releases moisture in dry air; when the water content is higher The bigger the film is, the more gradually the film loses its tensile strength, it becomes more and more soft, the elasticity gets better and better, and the greater the extension performance, so the coefficient of friction of the film will increase. Under these conditions, the machine It will be difficult to work. Therefore, it is very necessary to control the environmental conditions during production.

4. Can PVOH film be printed?

can. PVOH membranes can use water-soluble or solvent-based inks and use conventional printing methods without surface treatment; most packaging requires water-soluble properties, so water-soluble inks are the preferred choice. Because it can dissolve and disperse quickly. GREENSOL's "WS Easy Print" series is a low-cost flexographic printing product that can be used on vertical packaging machines to easily print PVOH films.

5. Can water-soluble film pack liquids?

can. Polyvinyl alcohol is almost insoluble in all organic solvents, other organic liquids, and mineral oils, but moisture and plasticizers are pulled out of liquid formulations (resulting in brittleness). Some organic solvents can cause membrane variations or even insolubles. The compatibility test should be performed first. Although water is the best solvent for PVOH, PVOH film can be used to package liquid formulations with very low water content. A very small proportion of water is effective in maintaining the elasticity of the film.

6. When the PVOH film dissolves in water, what form does it have and eventually disappears completely?

When the membrane dissolves, it breaks down into the smallest unit of invisible polymer chains, which are swallowed up by microorganisms in the water, and decomposes them into carbon dioxide and water. The PVOH polymer is completely biodegraded.

Water-soluble film packaging has many advantages: environmental protection, safety, no harmful substances after decomposition, thorough resolution of waste packaging problems, convenience, safe application, avoiding direct exposure of users to harmful substances, reducing storage and transportation costs, and accurately Measure the amount or weight required to prevent waste; packaging highly concentrated liquids can reduce the inventory area of ​​goods and increase the use rate of warehouses; and it is an effective marketing method.

Water-soluble film is suitable for packaging pesticides, gardening chemicals, seeds, dyeing raw materials, toilet cleaners, sewage treatment agents, mineral additives, detergents, disinfectants, concrete additives, chemical agents for photographic printing, etc.

Water-soluble film has many unique properties: environmental protection and biodegradable, rapid dissolution in water, higher expansion strength than plastic, anti-wear, tear and puncture resistance, non-toxic, anti-solvent, barrier odor, resistance Static electricity, excellent sealing performance, printability, cold crack resistance, etc.

Source of information: pack.cn