Paper bags are one of the indispensable and important components of roasted sunflower seed bags on the market. Compared to the flat pouch, Doypack is achieved with the bottom part gusseted into the pouch, which can be able to hold more product. Furthermore, the bottom gusset is going to support the pouch to stand up on the goods shelves.
Roasted sunflower seeds for preservation have higher requirements. If want roasted sunflower seeds to extend their shelf life, the bag’s air tightness and tightness performance requirements are higher. Based on a flexible combination of various polymer film materials, the foil materials can provide excellent barrier properties, protecting the roasted sunflower seeds from air, moisture, and light.
Besides, a creative artwork design can be printed on all sides of the standup packaging, 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 making the best use of 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 devoted to creating story-telling around seal standup bags for roasted sunflower seeds that increase product sales and establish a good brand image.
In this post, we will analyze the exact foil materials of this 110g roasted sunflower seeds paper standup bag, hoping it could serve as a reference for your products.
Now, let’s get into the details of this roasted sunflower seeds paper standup bag film material.
Packaging Foil Materials
This film material is a reinforced structure with excellent properties for sauce packages. The foil structure is Matte BOPP/Kraft Paper/VMPET/LDPE. The below graphic shows foil materials.
The film material of roasted sunflower seeds paper standup bag is made for four layers, with the outside Matte BOPP film working as the print substrate film, Kraft paper and VMPET film working as the middle supportive and barrier layer, and finally, the LDPE film working as the inner sealing layer. The thickness of the LDPE film should be adjusted to suit the requirements of 110g roasted sunflower seeds paper standup bag.
Next, We will talk further about each substrate film material.
Matte BOPP Film
Matte BOPP is a polymer film with a matte finish that absorbs light instead of reflecting it. With matte finish effect on the outside,
Matte BOPP film is widely used to improve visual effects and add a fashionable touch to the packaging. Matte BOPP film not only biaxially oriented films very clear, but they have also improved barrier properties
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 in color 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 can be used for a variety of purposes
VMPET Film
VMPET is the most commonly used aluminum metalized film in the flexible packaging field. It has high barrier performance against moisture vapor and oxygen. The barrier performance will enable your products well protected from the roaster warehouse to the consumer’s hand in a fine way.
LDPET 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 it is intended for roasted sunflower seeds paper standup bag? Will it break during the transit?
Great Standup Effect
With the supportive middle layer of Kraft/VMPET film, this fourfold foil laminate is stiff enough to create a good standup effect for the package up to 110g. As you can learn from the video below, the square bottom sachet presents a great standing profile for a 110g roasted sunflower seeds paper standup bag.
Please note, BOPP/LDPE foil structure should not be taken to a paper standup bag, as it may be too soft to present a good standing profile.
Mechanical Property
The paper standup bag will protect the roasted 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. You don’t want toasted sunflower seeds spilled on a cardboard box or the ground.
We put the mechanical properties of this 110g roasted 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.
Through the below video, you may learn the anti puncture strength test for foil laminate PET-Kraft paper45gsm-VMPET-LDPE Thick 110mic.
Also, a drop test of a filled package is one of the ways to check if the package may burst under sudden sharp forces.
As the adhesion of the aluminum metalized layer to the polyester film is low, the peel strength of this fourfold foil Matte BOPP/Kraft/VMPET/LDPE is not so strong as the plastic laminates, such as Kraft Paper/Metallized Cellulose/LDPE or Kraft Paper/Metallized Cellulose/PLA+PBAT. So, MatteBOPP/Kraft/VMPET/LDPE foil may be not strong enough for packages with a volume higher than 500ml.
Moreover, the adhesion of the aluminum metalized layer to the polyester film is low, printing on kraft paper will affect the exquisite degree of printing.
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 below table shows the typical values of the WVTR and OTR of the most common substrate films in flexible packaging.
Roasted sunflower seeds for preservation have higher requirements. If want roasted sunflower seeds to extend their shelf life, the bag’s air tightness and tightness performance requirements are higher, which increases the requirements of barrier performance of this foil material. Based on our experience, MatteBOPP/Kraft/VMPET/LDPE foil laminate will be able to meet most of the requirements for roasted sunflower seed bags.
In the above picture, we are producing for our roasted sunflower seeds customers, which is fully opaque and keeps the product in a fine situation even under daylight conditions or a humid environment.
Furthermore, WVTR (short for water vapor transmission rate) and OTR (Oxygen Transmission Rate) are evaluated for this laminated foil, with typical values listed in the below table.
| 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 |
WVTR and VTR Typical Values of PET/VMPET/LDPE
Furthermore, some reinforced foil structures are better packages to keep the freshness and flavors, with some available items listed below.
- BOPP/AL/LDPE
- PET/VMPET/LDPE
- PET/Kraft/VMPET/LDPE
- Kraft Paper/Metallized Cellulose/PLA+PBAT
We will always come to assist whenever you need help with this product.
Technical Data Sheet of 110g roasted sunflower seeds bag
Here, we attach the specification sheet of the 110g roasted sunflower seeds paper standup bag based on film material PET/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)
If you want to learn more about this BOPP/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 which leads to a more eco-friendly activity of the business. Upon the recent investigation of the chilli sauce market, more and more consumers are more likely to purchase a product that acts toward environmental sustainability.
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.
At present, we have developed several compostable foil materials that can be intended for chilli sauce, with list as below.
- Cellulose/Metallized Cellulose/PLA+PBAT Film
- Cellulose/Metallized Cellulose/PBS 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. Mono materials packages mean each layer of the multi-layer foil is made of the same resin, which can be easily processed in the human recycling system and reused for other applications. This recyclable materials sachet largely reduces the rate of plastic polymer film packages ending in landfills.
Nowadays, we have developed some spout pouches based on single resin film materials, that can be found good application for chilli sauce products. Limited to the mechanical strength of current materials, the maximum volume for these recyclable pouches should be controlled under 250 ml.
That all. If you have any questions regarding chilli sauce pouches, please reach us. Have a good time.
