Barrier foil made itself indispensable to the package. Barrier foil bags are one of the important components of sunflower seed packages on the market. The quad seal pouch is achieved with the bottom part gusseted into the pouch, which can hold more product. Furthermore, the quad seal pouch will support the pouch on the goods shelves.
Packages are required to preserve sunflower seeds. Based on a flexible combination of various polymer film materials, the foil materials can provide excellent barrier properties against sunlight, moisture, and oxygen.
As you can see, a creative artwork design can be printed on all sides of the quad seal pouch, including all the information for branding and sale, which makes the final package more attractive to consumers.
As a well-known flexible converter located in Qingdao, China, we are utilizing the packaging film materials in the market, listed below.
- fossil chemical polymer films
- Aluminum foil metal sheet
- vacuum metalized film materials
- Ceramic film substrates
- plant-based biopolymer materials
- biodegradable film materials
- compostable substrate films
- Fully recyclable substrate films
We are dedicated to producing standup paper bags that can boost the branding and sale of sunflower seed products for our customers and intend to be a long-term reliable supply under our QC system.
In this post, we will analyze the exact foil materials of this 300-gram sunflower seeds paper standup bag, hoping it helps you decide on the perfect package.
Packaging Foil Materials
As you can easily find out through the below picture, the foil structure is made of 3 layers, and we named it Kraft Paper 60gsm/VMPET12/LDPE40.
With the outside Kraft paper film working as the print substrate film, the middle supportive and barrier layer is Kraft paper film and VMPET film, the LDPE film working as the inner sealing layer.
- Kraft paper, with 60 grams per square meter, works as the outside and supportive layer, which is also considered as an eco-friendly material.
- VMPET film, with the most common thickness of 12 microns, works as the main barrier layer in this foil laminate.
- LDPE film, with thickness adjustable against the requirements of the final package, works as the inner sealing layer.
Kraft Paper Film
Kraft paper is one of the most commonly used materials to increase the eco-friendliness and sustainability of the packages.
Brown kraft paper is a heavy-duty, durable, and tear-resistant paper that is usually brown and made from wood pulp. It’s known for its natural wood fibers and textures and has an earthy, rugged look. Kraft paper is versatile and ideal for a variety of packaging.
VMPET Film
VMPET is one of the most common used aluminum metalized film in the flexible packaging field. It has high barrier performance against moisture vapor and oxygen which provides protection for product. The barrier performance will enable your products well protected from the factory to the consumer’s hand in a fine way.
VMPET film plays an important role in the packaging, meeting a variety of packaging needs and extending the shelf life of products.
LDPE Film
LDPE means low-density polyethylene film, which is the most used inner sealing layer for bags. It is able to provide enough sealing strength and airtight properties for the final packages.
LDPE is nontoxic, non-contaminating, and has a high degree of break resistance. It’s also lightweight, corrosion resistant, and has good chemical and impact resistance.
LDPE is a thermoplastic polymer that is a member of the polyethylene family of plastics. It is known for its flexibility, toughness, transparency, and corrosion resistance.
LDPE is also lightweight, easy to fabricate, and has good chemical and impact resistance.
So, how does this foil structure perform when intended for a paper standup bag containing sunflower seeds? Will it break during transit?
Hanging Hole
The hanging hole design allows the packaging bag can be hung on the shelf, especially in supermarkets, which can maximize the use of limited shelf space and facilitate the placement of more goods.
The hanging hole allows the bag to be easily hung on the hook or string, which is suitable for various occasions, such as supermarket shelves, display shelves, etc
Excellent Mechanical Property
The side gusset bag will protect the sunflower seeds product during filling, transit, and distribution. Under the emergency circumstances of unexpected shock in delivery or packages falling off the goods shelf, paper standup bags will never be allowed to break.
We put the mechanical properties of this 300g sunflower seeds paper standup bag on our top priority in our manufacturing plant. Serious measures are taken in our QC system, to assure each order is finalized with the expected result.
Also, a drop test of a filled package is one of the reliable ways to check if the package may burst under sudden sharp forces.
Barrier Performance
Usually, the barrier performance of a multi-material laminate is evaluated by WVTR (short for water vapor transmission rate) and OTR (Oxygen Transmission Rate). The table below shows the typical values of the WVTR and OTR of the most common substrate films in flexible packaging.
Based on our experience, Kraft/VMPET/LDPE foil laminate will be able to meet most of the requirements for sunflower seed bags.
We for the bag In the above picture, we are producing for our Chinese customers. It is fully opaque and keeps the product in a fine situation even under daylight conditions or a humid environment.
Furthermore, this laminated foil is evaluated using WVTR (short for water vapor transmission rate) and OTR (Oxygen Transmission Rate) are evaluated for this laminated foil, with typical values listed in the table below.
| Item | Standard | Unit | Typical Value |
| Water Vapor Transimission Rate | ASTM E 96 | g/m2/24hr | 0.85 |
| Oxygen Transmission Rate | ASTM D 372-99 | cc/m2/24hr | 1.2 |
Technical Data Sheet of 300g sunflower seeds bag
Here, we attach the specification sheet of the 300g sunflower seeds paper standup bag based on film material Kraft Paper/VMPET/LDPE.
More tests are included in this specification sheet with items available listed as below.
- Yield (grams per square meter)
- Tensile Strength (Mpa)
- Elongation Rate (%)
- Coefficient of friction, short as COF
- Solvents Left (mg/m2 )
- Sealing Strength (N/15mm)
- Sealing Conditions
- Bond Strength (N/15mm)
- Burst Strength (J)
- Anti-Puncture ability (N)
- Drop Test Ability (cm)
- Anti-pressure ability (kgs)
- Water Vapor Transmission Rate (g/m2/24hr)
- Oxygen Transmission Rate (cc/m2/24hr)
You can read more about this Kraft Paper/VMPET/LDPE laminated foil, you can read it here.
More Sustainable Materials Options
Along with the increasing burden of fossil-chemical polymer materials discarded into our environment, there is an unprecedented demand for sustainable packages, leading to a more eco-friendly business activity. Upon the recent investigation of the sunflower seeds market, more and more consumers are more likely to purchase a product that acts toward environmental sustainability.
Here, we will share some trending sustainable packages for the sunflower seeds market.
Compostable Packaging Materials
The compostable packages are based on plant-based fibers like cellulose, or bio-mass like corn starch, cassava, or sugarcane. The resins derived from these resources are usually named bio-polymer, which can break down into inorganic elements under the functions of algae, bacteria, and other microorganisms.https://youtu.be/ffKZjrxDPrs
We have developed several compostable foil materials that can be intended for sunflower seeds, as shown in the list below.
- Cellulose/Metallized Cellulose/PLA+PBAT Film
- Metallized Paper/Cellulose/VMPET/PLA+PBAT Film
- Kraft Paper/Metallized Cellulose/PLA+PBAT Film
Fully Recyclable Mono Materials
Compared with the high cost of compostable foil materials, fully recyclable materials sachets, and rolls are flooding the market for lightweight product packages in the market at much lower prices.
Along with the improvement of barrier performance of PE film materials, their foil laminate can be enabled with a fine property to keep the sunflower seeds from moisture. A layer of PVA coating is applied over the surface of LDPE and HDPE film to enhance the moisture barrier. EVOH can be included in the biaxially orientated film, which is usually called BOPE in the flexible packaging industry, to largely improve the oxygen barrier performance.
Contemporarily, we have developed some bags based on single resin film materials, that can be found in good application for sunflower seeds. We will provide further analysis in future posts.
Finally. Just reach us if you have any questions. Have a nice day!
