Standup screw cap pouches are a large part of the spicy chili sauce packs in the current market. With a flexible combination of various fossil chemical and plant-based film materials, the standup pouch can prevent the chili sauce from moisture and oxygen during transportation and distribution, and be more cost-effective than bottles and jars. As an eco-friendly consideration, VMPET is widely used in the packages for various chili sauces. Moreover, two sides of the standup bags will be printed with creative artwork to satisfy customers’ needs for branding and sale.
As a well-known flexible packaging manufacturer 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 standup screw cap bags that increase product sales and establish a good brand image.
In this post, we will analyze the exact materials of this 100g spicy chili sauce screw cap pouch, hoping it could serve as a reference for your products.
Ok, let’s get into the details of this standup screw cap spout bag.
Packaging Foil Materials
This foil material has a reinforced structure with excellent properties for spicy chili sauce packages. The foil structure is BOPP18/VMPET/LDPE, and the graphic is as below.
It is made of triplex layers, with the outside BOPP film 18 microns working as the print substrate film, VMPET film 12 microns 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 100g spicy chili sauce.
Next, let’s get a deeper understanding of each substrate film material.
BOPP18 Film
BOPP18 film is short for biaxially orientated polypropylene film, which is one of the most common print substrates in flexible packaging.
Biaxially oriented films have many advantages, including:
- Clarity: Biaxially oriented films are of ultra-clarity for printing purposes.
- Strength: They have high tensile properties and improved toughness
- Flexibility: They are more flexible
- Barrier properties: They have improved barrier properties
- Shrinkability: They can be made relatively easily shrinkable
VMPET Film
VMPET film is short for vacuum metalized polyester film, which is achieved under vacuum conditions to deposit a thin layer of aluminum atoms onto the surface of PET (polyester) film substrate, and finally realize a bright metallic film that is also widely used in flexible packaging and standup pouch packages. For this 100 gr chili sauce spout bag, VMPET film can provide enough barrier performance for the product, at a much lower cost than aluminum foil.
LDPE Film
LDPE film is short for low-density polyethylene film, which is the most used inner sealing layer for standing spicy chili sauce 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 property of the LDPE film should be modified to resist the alkaline corrosion of the liquid detergent. Different formulas of detergent liquids may require a particular modification of the low-density polyethylene film. If you need further assistance, you can reach out to us.
The customer artwork is printed reversely on the inner side of the first BOPP film layer in the gravure printing system. 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 BOPP/VMPET/LDPE foil.
Thickness
As you can see in the below picture, the overall thickness of this spout pouch is 0.345 mm, which equals 345 microns for this laminated foil.
Usually, we describe the finished laminate as Glossy BOPP/VMPET/LDPE foil. So, how does this foil structure perform when it is intended for standup spicy chili doy packs? Will it break during the distribution?
Great Standup Effect
This triplex foil laminate BOPP18/VMPET12/LDPE90 is of enough stiffness to provide a good standup profile for 100 grams of chili sauce products. Through the video below, you are going to have an actual understanding on the standup effect.
Please note, BOPP/LDPE foil structure should not be taken to convert standup spout bags, as it may be too soft to present a good standing profile.
Mechanical Property
The spout package will protect the spicy chili sauce 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 spicy chili sauce contaminating the cartons or the floor?
The mechanical property of this standup sachet is the 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 simply, a 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 in the video below, we are going to fill 100ml water into this bag, perform the drop test from 1.6 meters high, 3 times, and check if it breaks.
When the volume goes bigger, there will be higher requirements for the mechanical strength of this spout bag, and we may need to change the foil structure, like PA/VMPET/LDPE for packs around 500ml, NY/LDPE or PET/NY/LDPE for packs around 1000ml.
At present, we are outputting the standup spout pouch with a maximum volume of 5 liters, mainly for restaurant purposes. This 5 litre spout pouch is of excellent bag strength, and you can have a further understanding through the below video to show our drop test.
Ok, You may reach us for further ideas if you have any questions.
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 value of the WVTR and OTR of the most common substrate films in flexible packaging.
Upon experience, the partial packages for spicy chili sauce should be light-shielding to protect the formula work as expected. The main reason is to prevent light from accelerating its oxidation process, causing oil deterioration and loss of flavor. Therefore, it is necessary to ensure that the storage environment of the chili sauce is dark and away from light, can effectively extend its shelf life and maintain its flavor.
Furthermore, the chili sauce product will be kept from oxygen and moisture, 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 chili sauce products.
You can easily find out the typical values of moisture vapor transmission rate and oxygen transmission rate of this multilayer foil BOPP18/VMPET12/LDPE90.
| 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 |
So, some reinforced foil structures are better protections for the freshness and flavors, with some available items listed below.
- PA/VMPET/LDPE
- PET/VMPET/LDPE
- PET/AL/LDPE
You may reach us for further ideas on each foil structure if you need any assistance.
Technical Data Sheet of 100 grams spicy chili sauce screw cap pouch
Here, we attach the specification sheet of this 100 grams spicy chili sauce screw cap pouch based on foil laminate BOPP/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 get a further understanding of this BOPP/VMPET/LDPE laminated foil, you may just 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 juice 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 for current materials, the maximum volume for these recyclable pouches should be control under 250 ml.
Ok, let’s end here, you may reach us if you have any questions, nice day.
