Standup pouches are a large part of the packs for juice products in the current market. With a flexible combination of various polymer and biopolymer film materials, the standup juice pouch can protect the juice product during the distribution, and be more cost-effective. Furthermore, a creative artwork design can be printed on all sides of the standup 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 making the best use of the 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 stand-up juice bags that increase product sales. In this post, we will analyze the exact foil materials of this 230 ml juice stand-up bag, which assists this Cameroon juice manufacturer in greater success in their market.
With a refined package dimension, this stand-up screw cap bag accommodates 230 ml juice liquids with an excellent filled level. It can present an excellent standing profile for the product on the goods shelves, and you are advised to have a straight understanding through the video below.
Ok, let’s get into the details of this standup screw cap spout bag.
Packaging Foil Materials
The figure below shows the composition structure of this laminated foil material which is used to convert this standup juice bag.
It is made of triplex layers, with the outside PET film working as the print substrate film, the second PET film working as the middle reinforced layer, and finally, the LDPE film working as the inner sealing layer.
Next, let’s get into a deeper understanding on each substrate film materials.
PET Film
PET Film, is one of the most commonly used printing substrates in flexible packaging sachets. With great optical clarity, high gloss, good chemical resistance, stable mechanical strength, excellent dimensional stability, and great printability, it can present the customer artwork print in great quality, and also provide great mechanical strength to the final package.
The most commonly used thickness of PET film applied in the flexible packaging industry is 12 microns, which equals 0.48 gauge. So whenever you see PET12 or 0.48 g PET, you will know they mean the same thing.
LDPE Film
LDPE, means low-density polyethylene film, which is the most used inner sealing layer for standing juice bags. LDPE is also lightweight, easy to fabricate, and has good chemical and impact resistance. LDPE is recyclable and reusable, making it a popular alternative to traditional plastic. LDPE is nontoxic, non-contaminating, and has a high degree of break resistance. Most importantly, LDPE membrane can be modified against the requirement of specific products, and finalize the package with great seal strength and protection. The thickness of the LDPE membrane film will be decided against the particular application.
The customer artwork is printed reversely on the inner side of the first PET film layer in the gravure printing system. Then, these 3 layers are bonded together into a finished laminated foil material under the dry lamination or solvent-free lamination process.
Usually, we describe the finished laminate as PET12/PET12/LDPE foil. So, how does this foil structure perform when it is intended for stand-up juice bags? Will it break during the transit?
Great Standup Effect
PET film is of great stiffness, which makes it suitable for creating a good straight-standing effect for the stand-up bags. For some low-volume packages less than 500 ml, even PET12/LDPE foil laminate can create enough standing effect for most products. So, when there is an extra PET film layer applied in the middle of this foil laminate, the stiffness of this finished foil will be able to present stand-up profile.
Of course, the thickness of a finished foil influences the stand-up effect of this juice bag after being filled. The thickness of the LDPE film used in this foil laminate is 80 microns, with the overall thickness of this PET12/PET12/LDPE laminated foil around 105 microns.
The video below shows well the stand-up effect of this 230 ml juice stand-up sachet.
Mechanical Property
The spout package will protect the juice product during filling, transit, and distribution. Under the emergency circumstances of unexpected shock in delivery or packages falling off the goods shelf, the spout package will never be allowed to break. Can you ever imagine the leaked juice contaminating the cartons or the floor?
We put the mechanical property of this 230 ml juice stand-up sachet 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.
To put it simple, drop test of a filled package is one of the most reliable ways to check if the package may burst under sudden sharp forces.
Here, we are going to fill 230 ml water into this bag, and perform the drop test from 1.6 meters high, for 3 times, and check if it breaks.
Of course, two layer structure PET/LDPE can also be intended for 230 ml juice spout sachet. Some customers may just choose this PET/LDPE foil bag with a relative lower cost. However, the triplex foil laminate PET12/PET12/LDPE is able to present reinforced mechanical property than the two layer structure. You may reach us for a further analyze on the cost if you need.
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 juice product will be kept away from these two elements to stay fresh as long as possible. However, please keep in mind that, the barrier property of this laminated foil is just a part of the measures taken to ensure the shelf life of juice products. The below table shows the typical value of the WVTR and OTR of this triplex foil laminate PET12/PET12/LDPE.
| Item | Standard | Unit | Typical Value |
| Water Vapor Transimission Rate | ASTM E 96 | g/m2/24hr | 12.6 |
| Oxygen Transmission Rate | ASTM D 372-99 | cc/m2/24hr | 8.5 |
It is easy for the customers to understand this foil laminate is not of excellent barrier performance, as there is not any high barrier film layer in this foil structure. For some customers who have higher requirements for the flavors and freshness of their juice products, a foil laminate with higher barrier properties is inevitably needed.
In most cases, a layer of vacuum-metallized film, or aluminum foil or clear AlOx Coated polyester film is going to be included in the multi-layer foil materials. Through the below table, you can easily find out the typical values of moisture vapor transmission rate and oxygen transmission rate of common substrate film materials.
so, some reinforced foil structures are better protections for the freshness and flavors of juice products, with some available items listed as below.
You may reach us for further ideas on each foil structure if you need any assistance.
Technical Data Sheet of 200ml juice standing bag
Here, we attach the specification sheet of this 200ml juice standup sachet based on foil laminate PET12/PET12/LDPE80.
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 get a further understanding of this PET12/PET12/LDPE laminated foil, you may just read 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 juice market, more and more consumers are more likely to purchase a product that acts toward environmental sustainability.
Compostable Packaging Materials
Compostable packaging materials are very similar to biodegradable materials. In most cases, people may do not get a clear understanding on the difference between compostable and biodegradable. Generally speaking, the compostable materials are based on biodegradable materials and when they break down, they will not cause harmful elements to the environment.
As to the materials used in our factory, the customers can just consider biodegradable equal to compostable.
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.
Premium-quality compostable stand-up sachets and rolls are produced in our plant, which are intended to meet the particular requirements of every product. You may reach us for further ideas if you are interested in compostable packaging materials.
Fully Recyclable Mono Materials
Compared with the high cost of compostable foil materials, actually fully recyclable materials sachets and rolls are flooding the market for lightweight products 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.
Now, the mono-materials recyclable spout sachet can be well intended for juice from 50~250 ml, with the barrier performance as good as traditional metalized film spout doy-pack. That’s good enough for the packages of juice products.
Of course, you are welcome to reach us when you have any questions regarding juice pouches. Nice day.
