Description

1 Introduce

The 150g chestnut plastic bag is a convenient and practical packaging option,with a clever design that meets the storage needs of chestnuts well.It has a moderate capacity,typically holding about 5 kilograms of chestnuts per bag,making it easy to transport and store.The plastic bag has good air permeability and moisture transmission,which can prevent chestnuts from deteriorating due to lack of oxygen and avoid mold growth caused by accumulated moisture.When using it,simply adjust the opening of the bag according to the ambient temperature to effectively extend the shelf life of chestnuts and maintain their freshness and taste.In addition,this type of plastic bag is low in cost,easy to use on a large scale,and convenient for storage and transportation.It is an economical and practical choice for chestnut preservation.

Here we will give a further analysis on this amazing chestnut pouch, and hope you will get a fantastic package for your products.

 

2 Foil Materials

This foil material is a reinforced structure with excellent properties for chestnut packages.It is typically made of polyethylene or non-toxic polyvinyl chloride,which offers good air permeability and moisture transmission.This enables it to effectively regulate the humidity inside the bag,reduce water loss from chestnuts,and prevent mold growth due to excessive humidity.With low cost and easy usage,it is suitable for large-scale applications and facilitates storage and transportation.By properly adjusting the bag opening according to different temperatures,it can significantly extend the shelf life of chestnuts,maintaining their freshness and taste.It is an ideal choice for chestnut storage The foil structure is PET12/PA15/LDPE , with a graphic as below.

Let’s first get a further understanding on each substrate layer material.

PET12, is one of the most commonly used printing substrates in flexible packaging pouches. 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.

PA(polyamide)plastic bags demonstrate exceptional high performance in the plastic packaging field.They possess high strength and wear resistance,capable of withstanding significant weight and friction without easy tearing.Moreover,PA plastic bags have excellent heat resistance and chemical resistance,allowing for usage across a broad temperature range and good tolerance to a variety of chemical substances.They are transparent with a high gloss,and the film is flexible.They also have excellent oxygen barrier properties and puncture resistance,making them suitable for packaging rigid items such as greasy foods and vacuum-packed foods.

LDPE, means low-density polyethylene film, which is the most used inner sealing layer for chestnuts 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 LDPE membrane will be decided against particular application.

3 Properties and Quality Assurance

3.1 Exquisite print quality
The artwork is achieved in gravure printing on our rotogravure print press which can print up to maximum 10 colors. With advanced print techniques and print defects inspection system, we are now outputing fantastic print effects for the customers’ artwork.

You are advised to watch the video below to have a further understanding on the print quality of this 150g bottom gusset for chestnut .

In our manufacturing plant, we take serious measures to achieve high color fidelity and consistency for repeated printed orders, and here we are going to give a basic introduction.

a.  Color Analyzer

This color analyzer is one of the auxiliary tools in our system to achieve the highest standard for color fidelity. The exact Advanced doesn’t just validate the color of CMYK and spot color inks, it can simultaneously measure four M modes to visualize the spectral reflectance of a substrate or ink, measure the concentration of a specific ink, and measure the difference of a substrate or ink over white and over black.

b. Pantone Color Code

Pantone color guide would be so helpful to locate a specific color for the pring service supplier and the customers, especially there is a large area printed in single Pantone color. For many Pantone colors, the accurateness may be influenced by the printer, paper substrate and environmental factors when it is printed onto physical photo paper. We will locate the Pantone Color Code with the customers in their artwork design before the order is put into produce.

c. Physical Printed On Photo Paper

The computer files such as JPG, PDF, PSD, AI etc can not be taken as the guide to determine the color in print produce, as they present the colors through electronic screening devices. And different electronic screens may be set in different parameters by the various manufacturers, which will inevitably interfere with the colore presentation. Artwork can only be a reliable guide when printed on physical substrate, with the most common photo paper applied.
You may read here to understand more about how our company ensures color fidelity and consistency for all our orders.

Measures taken to achieve high color fidelity and consistency in reprints

 

3.2 Excellent Matte Finish Effect

The matte finish effect of this amazing chestnut pouch is achieved by coating a layer of matte lacquer over the outside of the PET substrate layer, with great adhesion and uniformity. The lacquer layer is of great scratch resistance, which avoids the small hidden lines when the foil passes through the rollers during the bag-making process.

3.3 Excellent Dimension Stability

There is an increasing requirement for the dimension stability of the chestnut pouch when the  packers are going to improve the production efficiency with high-speed filling lines. We get quite a good understanding on this ,and are doing our job to narrow the tolerance of the dimensions for each order produced in our long-term supply. Usually for the 150g chestnuts, the tolerance should be controlled within +-2%, which can run well on most of the high-speed filling machineries in the market.

3.4 Delicate Bag Making

The bag is achieved with delicate details, which can create a perfect impression for the consumers when they pass by the products, and cause them a purchase. Some customers do like to buy a product out of its gorgeous profile.

3.5 High Barrier Performance

As explained previously, this foil laminate is finalized with a layer of thin aluminum metal sheet, which is of the best barrier performance against oxygen and moisture vapor. Usually, the chestnuts should be well protected to keep the original flavor and fragrance for a prolonged period, to enable the chestnuts enjoyed by the end consumers.

3.6 Fantastic Standup Effect

The bottom of this 150g chestnut pouch is much like a box when the chestnuts are filled, and that will make the package well stand up on the goods shelf, good for branding and sale.

3.7 Great Mechanical Strength

This reinforced laminated foil can greatly protect chestnuts ranging from 100g to 150g volume.
We perform various inspections and tests to check the mechanical strength of the finished pouch, like drop tests, hard sudden strikes, anti-pressure tests
Tensile Strength
Sealing Strength
Anti-puncture Strength
Burst Impact Strength
Anti-pressure Property

3.8  Easy Filling of chestnuts
A large opening can be achieved on the block bottom chestnut bag, which enables the easy and fast filling of chestnuts into the pouch.

4 Quality Control Measures

Serious quality control measures have been taken in our manufacturing plant, to ensure each order is finished meeting the requirements of particular customers. With more than ten years of working experience in this field, we finalize this QC manual standard, to make sure each order is produced following the correct procedure.
Here, please allow us to guide you further into our QC system.

4.1 Manufacturing Traceback

We apply a strict recording system to document the manufacturing details, such as environmental conditions, craftsmanship parameters, production facility conditions, etc, which allows us to trace back whenever there is a problem.

4.2 QC Test Report Against Each Order

There will be a QC test report issued against each order produced, with the core items evaluated in it.  It is highly appreciated by our customers.

4.3 Print Inspection

In our manufacturing plant, the print inspection is always taken and done in a serious way, as we will never allow the customer artwork to be achieved in a way that deteriorate their business. On our gravure print press, there is in-line inspection system which can eliminate more than 98% of the defects in the printing process.

You may check how it works on our control panel.

There is also a supplementary off-line inspection equipment, to allow us to do the print inspection again whenever it seems necessary.

4.4 Airtight Property Test

The finished chestnut bag should be completely airtight, to get the products well-protected from oxygen and moisture in the environment.

In actual operation, we will pick up 1 bag every 1,000 pcs, and perform the test following the procedure in our QC manual.

 

4.5 Drop Test
Drop test should be considered as a very reliable way to check if the chestnut bag strength is enough to meet the various conditions, as it copies the way when the products falls off the good shelves, and the finished bag will suffer great sudden shock. In our daily QC work, We perform drop test against each order, of course, the standard for this drop test should be decided against customer needs.

Here, we are going to drop the filled chestnut pouch from 1.6m high, for 5 times.

 

4.6 Hard Sudden Strikes on inflated chestnut pouch

Hard sudden strikes should be taken as a more fierce test method than drop test, as it causes much higher force on inflated packages.

 

4.7 Anti-Pressure Test

Pressure-resistance test is another effective method to decide if the final package will serve as great protection for the products, especially liquid products, like household detergent liquids, and windshield washer fluids. For chestnuts bags, we will perform the anti-pressure test in our daily QC work, to ensure each order is finished with great mechanical strength.
The leakage or breakage of the chestnut bag will surely be a disaster, either for the distributor or the manufacturer.  We will never expect this thing happens in our customer’s business.
Sometimes, for easier and fast operation, we may just get one person to stand on the well-sealed and inflated chestnut bag, to check if there is any burst of them.

4.8 Laboratory Tests

Laboratory tests are essential to keep us updated with the intrinsic properties of the foil materials which are not visible to the human eyes. It is crucial for gaining a thorough understanding of the data about the production of our bags. The craftsmanship can be improved bit by bit to pursue premium quality bags based on thorough analysis and application of these data. You may check more of these tests in the Technical Data Sheet part of this post.

4.9 Third-party Inspection

Third-party inspection is available for all our orders on agreed standards or regulations.

5 Human Food Safety

All the film materials, inks, adhesives, and solvents used to convert into kinds of food bags and packaging materials will comply with the regulations for human food safety. The below graphic shows the mass spectra in migration tests on these multilayer flexible pouches these are in direct contact with foods.

Through the below link, you will be able to study the certificates on each of the materials adapted in our factory.

Human Food Safety

6 Package Dimension and Filled Level

Nevertheless, the customer needs to locate a fine dimension for his expected packages, and we will be of the best assistance in locating the fine options for our customers.
For this 150g chestnut bag, we are going to fill 150g of chestnuts into the pouch and see the final filled level.

 

7 More Sustainable Options

With the increasing burden on plastic pollution, more and more manufacturers are now seeking more sustainable packages, like compostable film materials, recyclable mono materials packages, and plant-based materials packages. They all prove to be more eco-friendly and sustainable than the traditional plastic films which are usually derived from fossil chemicals, and very difficult to recycle and break down in the environment.
Here, we are going to share some of the trending sustainable packages for the chestnut market.
7.1 Compostable film material packages

Thanks to the fast development of plant-based film materials, we can present the multi-layer standup pouch and roll foils in full compostable and biodegradable options.

The compostable substrate films we adapt to convert the multi-layer flexible pouches are listed below.
BOPLA Film
PLA+PBAT Film
Kraft Paper
Metallized Paper
Cellulose Film
Metallized Cellulose Paper
PBS Film
PVDC Coated Cellulose Film
Metallized BOPLA Membrane
We are now achieving multilayer compostable foil materials based on extrusion coating lamination, solvent-free lamination and dry lamination, and then convert into various types of flexible pouches against customers’ requirements.
Some of the common compostable foil structures are listed below.
Kraft Paper/PLA+PBAT Membrane
Kraft Paper/BOPLA Membrane
Cellulose/PLA+PBAT Membrane
Kraft Paper/PBS Foil Membrane
Metallized Paper/PLA+PBAT Membrane
BOPLA/PLA+PBAT Membrane
Cellulose/Metallized Cellulose/PLA+PBAT Membrane
Kraft Paper/Metallized Cellulose/PLA+PBAT Membrane
Cellulose/Metallized Paper/PLA+PBAT Membrane
Kraft Paper/Cellulose/PLA+PBAT Membrane
Kraft Paper/Cellulose/PBS Membrane
Metallized Paper/Cellulose/PLA+PBAT Membrane
Here, we are going to introduce the main performance of these compostable materials pouches.
a. Compostable
All the film materials we adapt are certificated compostable, under home or industrial conditions, complying with the standards EN 13432 or ASTM 6400.

The films will present different biodegradation behaviors under different conditions, such as industrial composting facilities, home and garden conditions, and nature soil conditions.

In most cases, industrial composting will be able to achieve a faster biodegradation of the compostable film materials than other composting progress, as it is able to provide better conditions.

Some manufacturers would like to have a better biodegradation behaviors of their own compostable packages under nature soil conditions, as in most cases, the abandoned package may not be recycled into human composting facilities.

You may read here to have a better understanding of the break-down progress of our compostable foil laminated materials under the nature condition in Qingdao, Shandong, North China conditions.

The biodegrading process of compostable film materials buried in nature soil

b. High-barrier performance pouches
Through vacuum metallization, PVDC coating, and AlOx/SiOx depositing, the compostable films can be achieved with better barrier performance, such as water vapor transmission rate (short as WVTR) and Oxygen Transmission Rate (short as OTR). Later on, we will combine several layers of the barrier film and convert into laminate foil, with an improved barrier property for finished packages.odles, or soup products.

In below table, we are going to share some barrier data of the most common foil laminates tested on our Mocon permeation tester.

Biodegradable Foil Laminate	WVTR (g/m2/24hr)	OTR (cc/m2/24hr)
BOPLA40/PLA+PBAT60	62.2	267
Cellulose30/PLA+PBAT60	131.5	5.6
Kraft Paper45g /PLA+PBAT60	44	742
Kraft Paper45g/BOPLA40	41	380
Metallized Paper69g/PLA+PBAT40	27	127
Cellulose30/Metallized Cellulose20/PLA+PBAT60	23	0.16
Cellulose30/Metallized Cellulose20/BOPLA40	25	0.12
Metallized Paper 69g/Cellulose30/PLA+PBAT60	5.6	1.12
Kraft45g/Metallized Cellulose20/PLA+PBAT60	26	0.22
Cellulose30/Kraft45g/PLA+PBAT60	19	117.2
Cellulose30/Metallized Paper69g/PLA+PBAT60	8.9	1.1

c. Alkaline Resistant

We put a certain amount of bleaching powder into the compostable pouches with various foil structures, and place them in an environment of 40~45 Celsius degree, to accelerate the aging process of the compostable pouches.

The test result proves the compostable pouches will be fine for packing alkaline products, like household detergent powder, and hand wash cubes.

However, it is not ok for household liquid detergent and other liquid cleaning chemicals.

You may watch the video below for further knowledge on it.

d. Frozen Treatment
The compostable pouches can be well intended for frozen treatment for some food products, and the mechanical property of the frozen pouch still works well as good protection for the products during the transportation and distribution process.

You may watch the video below to study the test in our office.

e. Vacuum Packages
The compostable pouches can be intended for the vacuum packages for products, like milk powder, nutrition products, etc.

f. Hot Filling up to 100 Celsius Degree
The compostable pouch will be fine for the hot filling process, which may work well for juice products.
Watch the video below to learn our test.

g. Microwave Oven Treatment
The compostable doypack can be well intended for microwave oven treatment, such as melting the candle wax, etc.
Please note, there should not be metalized film layer in the compostable pouch when it is intended for this microwave treatment purpose.

You may read here for better understanding on the compostable plant-based film materials packaging.

Compostable Plant-film Materials Pouch Packaging

7.2 Mono Materials Recyclable Pouch Packages

Mono meterials pouch packages are truly recyclable, as they can be easily processed into plastic granules which can be used again for other applications. However, for the traditional multilayer laminates, take PET/LDPE for example, it is difficult to process, as PET and LDPE are quite different materials, and can not be melted under the same conditions. That’s why momo materials pouch packages are becoming so widely popular in the packaging field, and highly reputed in the consumer market.
At present, mono-materials pouches are divided into Polyethylene channels and Polypropylene channels, with polyethylene channels much more popular, as they can be converted into kinds of standup pouch packages with relatively high performance.
Here we list the film materials that can be well intended for mono-materials recyclable pouch packages.
MDOPE Film
BOPE Film
APE Film
LDPE Film
LLDPE Film
CPE Film
ABOPP Film
CPP Film
VMCPP Film
VMBOPP Film
EVOH-LDPE Film
HDPE Film
Various foil laminates can be achieved based on the above film materials with different properties, which are intended to meet the particular requirements for specific products. Some of the common mono-material foil laminates are listed below.
MDOPE/APE
MDOPE/LDPE
MDOPE/EVOH-LDPE
MDOPE/HDPE/APE
MDOPE/BOPE/APE
BOPE/APE
BOPP/CPP
BOPP/VMCPP
ABOPP/VMCPP
From our experience, mono-materials pouches can be well intended for spices powder products.
You may have a further understanding of the recyclable mono materials and pouches here, and just reach us if you have any questions.

8 Reliable filling machinery to fill products into this bottom gusset chestnut pouch

Our bags are produced for running on the high-speed filling lines, which maximize the production efficiency for the chestnuts. Of course, you will have to find a reliable filling machinery to do this job.

9 About the manufacturer

Qingdao Tongli Packaging has devoted itself to the manufacture of quality chestnut bags for more than 10 years, with long-term customers around the world. You may just rely on us if you would like to get a sustainable and reliable supply for your chestnut packages.