Water soluble film is simple but effective, and requires a lot of precise detail to produce exactly what is needed. It has to hold up during storage, filling/packing, and then dissolve properly in water. Failure to match specifications can result in ruptured packing, inadequate or slow dissolving, and wasted material.
Finding the right water soluble film manufacturer is an important choice for companies using this type of product. There are many factors to consider besides film thickness and price. Production quality, dissolving conditions, strength, storage requirements and technical support are all integral parts of the specification.
Where Water-Soluble Film Can Be Beneficial
Water-soluble film is created to either dissolve or break down when in contact with water under specific conditions. It can be beneficial for products that require dosing or reduced manual handling. Some of the common benefits are:
- Easy portion control – A measured amount of the product can be placed inside the film
- Less direct handling – Manual contact with the product itself is reduced
- Reduced usage of other packaging – In certain cases, the film can replace conventional wrapping or containers
- Simpler product use – In some cases, an entire dose can be placed into water rather than opening and measuring the product
A Simple Example of How the Film Is Used
For instance, a measured amount of a product can be placed into a small pouch made of water soluble film. Instead of pouring the product into water, the pouch is placed into the water and dissolves.
However, it is important to keep in mind that water-soluble film is not suitable for all products.
Factors to Consider When Choosing a Manufacturer
There are several factors that companies should consider before choosing a manufacturer for a custom water-soluble film pouch, bag or wrapping.
Share Complete Application Details
It is vital to describe the application in detail. Information regarding the product to be placed in the package, methods of filling, sealing, storage conditions and use by the consumer are all vital to choosing the right material.
Important Performance Questions to Ask
Several specific questions should be asked to a potential supplier, including:
- Dissolving conditions – Water soluble film will behave differently in cold, warm and hot water. Ask for conditions under which the film will begin to dissolve and then fully dissolve
- Film strength – Thinner film means less material, but it also means less strength. Make sure the film is suitable for your filling and sealing equipment, as well as the weight of the product inside the package
- Storage conditions – Many water-soluble materials are sensitive to moisture. Ask for recommended storage conditions including temperatures and humidity before placing a substantial order
Reviewing Technical Specifications
These are just some of the questions that should be asked to shortlist reliable suppliers. Technical specifications can be found on many websites, including www.watersolubleplastics.com .
Comparing Suppliers – Key Questions
When comparing potential suppliers, it is recommended to ask the following questions:
- What grade of water soluble film would be best for my application?
- What temperature water is required to dissolve the film?
- How should the rolls of film be stored?
- Can I have samples tested before larger orders are placed?
- What method of sealing is most suitable?
- Are there options for different width, thickness and roll lengths?
- What technical documentation can I receive?
Why Sample Testing Matters
Testing a sample is always a good idea. A small trial production can highlight potential issues before a full product run. Sometimes, it is cheaper to pay extra for a high quality, durable film with good dissolving characteristics than face large losses due to machine downtime, faulty packing, loss of product and customer complaints.
Key Takeaways
- Match film grade to the product, equipment, and water temperature
- Always test samples before investing in full scale production
- Ask specific questions about storage, sealing, strength and dissolving
- Compare technical specifications and not just the price
- Pay close attention to moisture sensitivity and other potential risks
Making a Better Choice When Selecting a Supplier
A reliable supplier will invest time and effort to find the best specification for a given application, rather than provide generic information. Start by giving detailed information on the proposed application and how the finished product will be produced, including filling methods, sealing, storage conditions and transportation. Wherever possible, request samples and test them under real production conditions. Pay attention to strength, sealing performance, moisture resistance and dissolving characteristics. Comparing specifications at the beginning of the process will ensure fewer problems during production and will also save time and money in the long run.