Weilan Packaging

Weilan Packaging From concept to delivery of tailor-made, Weilan provides high quality flexible packaging solutions f

🔍 𝗪𝗵𝗮𝘁 𝗗𝗼𝗲𝘀 “𝗖𝗼𝗿𝗼𝗻𝗮 𝗧𝗿𝗲𝗮𝘁𝗲𝗱” 𝗠𝗲𝗮𝗻 𝗶𝗻 𝗙𝗹𝗲𝘅𝗶𝗯𝗹𝗲 𝗣𝗮𝗰𝗸𝗮𝗴𝗶𝗻𝗴?⚡ Corona treatment is a surface treatment used on plastic films ...
11/10/2026

🔍 𝗪𝗵𝗮𝘁 𝗗𝗼𝗲𝘀 “𝗖𝗼𝗿𝗼𝗻𝗮 𝗧𝗿𝗲𝗮𝘁𝗲𝗱” 𝗠𝗲𝗮𝗻 𝗶𝗻 𝗙𝗹𝗲𝘅𝗶𝗯𝗹𝗲 𝗣𝗮𝗰𝗸𝗮𝗴𝗶𝗻𝗴?

⚡ Corona treatment is a surface treatment used on plastic films such as BOPP, PE and PET.

It increases the films surface energy, helping inks, adhesives and coatings wet the surface more effectively and achieve better bonding.

⚠️ 𝗕𝘂𝘁 𝗵𝗲𝗿𝗲𝘀 𝘀𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁: 𝗻𝗼𝘁 𝗯𝗼𝘁𝗵 𝘀𝗶𝗱𝗲𝘀 𝗼𝗳 𝗮 𝗳𝗶𝗹𝗺 𝗮𝗿𝗲 𝗻𝗲𝗰𝗲𝘀𝘀𝗮𝗿𝗶𝗹𝘆 𝗰𝗼𝗿𝗼𝗻𝗮 𝘁𝗿𝗲𝗮𝘁𝗲𝗱.

For materials such as BOPP and VMBOPP, its essential to confirm which side has been treated and whether its suitable for printing or lamination.

📏 𝗪𝗵𝗮𝘁 𝗮𝗯𝗼𝘂𝘁 𝗱𝘆𝗻𝗲 𝗹𝗲𝘃𝗲𝗹𝘀?

Surface energy is commonly expressed in dynes/cm. The appropriate level depends on the material, ink or adhesive system, and the intended application.

⏳ 𝗢𝗻𝗲 𝗺𝗼𝗿𝗲 𝘁𝗵𝗶𝗻𝗴: 𝗰𝗼𝗿𝗼𝗻𝗮 𝘁𝗿𝗲𝗮𝘁𝗺𝗲𝗻𝘁 𝗰𝗮𝗻 𝗱𝗲𝗰𝗿𝗲𝗮𝘀𝗲 𝗼𝘃𝗲𝗿 𝘁𝗶𝗺𝗲.

Storage conditions, handling and the time elapsed since treatment can all affect the films surface energy.

💡 So, when discussing a film specification, dont just ask, “Is it corona treated?”

𝗔𝗹𝘀𝗼 𝗮𝘀𝗸:
✓ Which side is treated?
✓ What is the target dyne level?
✓ Is the treated side intended for printing or lamination?
✓ When was the treatment performed?

These small details can make a big difference in printing quality, lamination adhesion and overall packaging performance.

𝗪𝗵𝘆 𝗱𝗼𝗲𝘀 𝘁𝗵𝗲 𝗳𝗶𝗹𝗹𝗶𝗻𝗴 𝗺𝗮𝗰𝗵𝗶𝗻𝗲 𝗺𝗮𝘁𝘁𝗲𝗿 𝘄𝗵𝗲𝗻 𝗱𝗲𝘀𝗶𝗴𝗻𝗶𝗻𝗴 𝗮 𝗯𝗮𝗴?When we talk about bag design, the first things that usually co...
09/10/2026

𝗪𝗵𝘆 𝗱𝗼𝗲𝘀 𝘁𝗵𝗲 𝗳𝗶𝗹𝗹𝗶𝗻𝗴 𝗺𝗮𝗰𝗵𝗶𝗻𝗲 𝗺𝗮𝘁𝘁𝗲𝗿 𝘄𝗵𝗲𝗻 𝗱𝗲𝘀𝗶𝗴𝗻𝗶𝗻𝗴 𝗮 𝗯𝗮𝗴?

When we talk about bag design, the first things that usually come to mind are the product, capacity, material and appearance.

But there is another factor that can have a surprisingly big impact:

👉 𝗛𝗼𝘄 𝘄𝗶𝗹𝗹 𝘁𝗵𝗲 𝗯𝗮𝗴 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗯𝗲 𝗳𝗶𝗹𝗹𝗲𝗱?

A bag is not designed only to hold the product.
It 𝗮𝗹𝘀𝗼 𝗻𝗲𝗲𝗱𝘀 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝘁𝗵𝗲 𝗺𝗮𝗰𝗵𝗶𝗻𝗲 𝘁𝗵𝗮𝘁 𝗳𝗶𝗹𝗹𝘀, 𝗵𝗮𝗻𝗱𝗹𝗲𝘀 𝗮𝗻𝗱 𝘀𝗲𝗮𝗹𝘀 𝗶𝘁. ⚙️

Different filling machines and filling methods can have different requirements for:

🔹 Bag opening and mouth design
🔹 Clamping and handling areas
🔹 Side gusset and overall bag width
🔹 Zipper, handle or spout positioning
🔹 Sealing area and sealing method
🔹 Filling speed and machine movement

The product itself matters too. 📦

Density, particle size, shape and flowability can all affect how the product enters the bag and how much volume the bag actually needs.

For example, two products with the same net weight may require very different bag dimensions simply because their density and filling behavior are different.

This is why, when a customer asks us to recommend a bag size, 𝘄𝗲 𝗱𝗼𝗻’𝘁 𝗹𝗼𝗼𝗸 𝗮𝘁 𝘁𝗵𝗲 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘄𝗲𝗶𝗴𝗵𝘁 alone.

We want to understand the whole filling process:

🔍 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗯𝗲𝗶𝗻𝗴 𝗳𝗶𝗹𝗹𝗲𝗱?
⚖️ 𝗛𝗼𝘄 𝗺𝘂𝗰𝗵?
📦 𝗪𝗵𝗮𝘁 𝗶𝘀 𝘁𝗵𝗲 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗹𝗶𝗸𝗲?
⚙️ 𝗪𝗵𝗶𝗰𝗵 𝗳𝗶𝗹𝗹𝗶𝗻𝗴 𝗺𝗮𝗰𝗵𝗶𝗻𝗲 𝘄𝗶𝗹𝗹 𝗯𝗲 𝘂𝘀𝗲𝗱?
🔧 𝗔𝗻𝗱 𝗵𝗼𝘄 𝗱𝗼𝗲𝘀 𝘁𝗵𝗲 𝗺𝗮𝗰𝗵𝗶𝗻𝗲 𝗵𝗮𝗻𝗱𝗹𝗲 𝗮𝗻𝗱 𝘀𝗲𝗮𝗹 𝘁𝗵𝗲 𝗯𝗮𝗴?

Because a bag can look perfect on a drawing and still be difficult to run on a real production line.

That’s an important part of packaging design that is sometimes overlooked. 👀

𝗚𝗼𝗼𝗱 𝗯𝗮𝗴 𝗱𝗲𝘀𝗶𝗴𝗻 𝗶𝘀 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗮𝗯𝗼𝘂𝘁 𝗺𝗮𝗸𝗶𝗻𝗴 𝘁𝗵𝗲 𝗿𝗶𝗴𝗵𝘁 bag.It’s 𝗮𝗯𝗼𝘂𝘁 𝗺𝗮𝗸𝗶𝗻𝗴 𝘁𝗵𝗲 𝗿𝗶𝗴𝗵𝘁 𝗯𝗮𝗴 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗔𝗡𝗗 𝘁𝗵𝗲 𝗺𝗮𝗰𝗵𝗶𝗻𝗲. 🤝

That’s why 𝗧𝗛𝗘 𝗥𝗜𝗚𝗛𝗧 𝗕𝗔𝗚 𝗗𝗘𝗦𝗜𝗚𝗡 𝗦𝗧𝗔𝗥𝗧𝗦 𝗪𝗜𝗧𝗛 𝗧𝗛𝗘 𝗥𝗜𝗚𝗛𝗧 𝗤𝗨𝗘𝗦𝗧𝗜𝗢𝗡𝗦. 💡

𝗪𝗵𝘆 𝗱𝗼 𝗿𝗲𝘁𝗼𝗿𝘁 𝗽𝗼𝘂𝗰𝗵𝗲𝘀 𝘀𝗼𝗺𝗲𝘁𝗶𝗺𝗲𝘀 𝗱𝗲𝗹𝗮𝗺𝗶𝗻𝗮𝘁𝗲 𝗮𝗳𝘁𝗲𝗿 𝗿𝗲𝘁𝗼𝗿𝘁?This is a problem we come across quite often when working with r...
05/10/2026

𝗪𝗵𝘆 𝗱𝗼 𝗿𝗲𝘁𝗼𝗿𝘁 𝗽𝗼𝘂𝗰𝗵𝗲𝘀 𝘀𝗼𝗺𝗲𝘁𝗶𝗺𝗲𝘀 𝗱𝗲𝗹𝗮𝗺𝗶𝗻𝗮𝘁𝗲 𝗮𝗳𝘁𝗲𝗿 𝗿𝗲𝘁𝗼𝗿𝘁?

This is a problem we come across quite often when working with retort packaging.

And in many cases, it’s not simply because “the adhesive is not good enough.”

Retort puts much more stress on a flexible package than normal packaging does. High temperature, moisture, pressure and long processing times can all affect the performance of the laminated structure.

From what we see in practice, there are several things that need to work together:

🌡️ 𝗥𝗲𝘁𝗼𝗿𝘁 𝘁𝗲𝗺𝗽𝗲𝗿𝗮𝘁𝘂𝗿𝗲 & 𝘁𝗶𝗺𝗲
121°C for 30 minutes is very different from 126°C for 80 minutes.

🧪 𝗔𝗱𝗵𝗲𝘀𝗶𝘃𝗲 𝘀𝘆𝘀𝘁𝗲𝗺
The adhesive needs to be suitable for the actual retort conditions, not just normal dry-food applications.

⏳ 𝗖𝘂𝗿𝗶𝗻𝗴
The lamination needs enough time and the right conditions to fully cure before retort.

🧱 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹 𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲
PET, AL, PA, RCPP and other layers each behave differently under high-temperature retort conditions.

⚙️ 𝗧𝗵𝗲 𝗮𝗰𝘁𝘂𝗮𝗹 𝗿𝗲𝘁𝗼𝗿𝘁 𝗽𝗿𝗼𝗰𝗲𝘀𝘀
The same pouch structure can perform differently depending on the product being filled and retort process.

That’s why when a customer tells us, “The pouch delaminated after retort,” we don’t look at just one layer.

We look at the 𝘄𝗵𝗼𝗹𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 — 𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲, 𝗮𝗱𝗵𝗲𝘀𝗶𝘃𝗲, 𝗰𝘂𝗿𝗶𝗻𝗴 𝗮𝗻𝗱 𝗿𝗲𝘁𝗼𝗿𝘁 𝗽𝗿𝗼𝗰𝗲𝘀𝘀.

In retort packaging, 𝗲𝘃𝗲𝗿𝘆 𝗹𝗮𝘆𝗲𝗿 𝗵𝗮𝘀 𝗮 𝗷𝗼𝗯. 𝗔𝗻𝗱 𝗲𝘃𝗲𝗿𝘆 𝗱𝗲𝘁𝗮𝗶𝗹 𝗺𝗮𝘁𝘁𝗲𝗿𝘀.

This is one of those packaging problems where 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗿𝗲𝗮𝗹𝗹𝘆 𝗺𝗮𝗸𝗲𝘀 𝗮 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝗰𝗲.

🐾 How do you choose packaging for 10kg+ pet food?When the bag gets bigger, packaging becomes a very different game.For a...
23/09/2026

🐾 How do you choose packaging for 10kg+ pet food?

When the bag gets bigger, packaging becomes a very different game.

For a small pet food pouch, packaging performance is important.

But when we move to 10kg, 15kg or even larger pet food bags, the requirements become much more demanding.

The question is no longer simply:

“What material should we use?”

It becomes:

“Can the bag survive the journey?”

From filling to sealing, palletizing, transportation, warehousing and finally reaching the consumer, the bag goes through many stages.

💪 Mechanical strength matters.

For large-format pet food bags, we need to consider:

🔹 Puncture resistance
🔹 Tear resistance
🔹 Drop resistance
🔹 Bottom strength
🔹 Seal integrity
🔹 Handle performance

A bag may look perfect on the production line, but that doesn’t necessarily mean it will perform well during transportation and handling.

📦 Structure & thickness

For heavier bags, the structure should be designed around the actual application, not simply the product weight.

Materials such as PA/BOPA (Nylon) can provide additional mechanical strength and puncture resistance.

But the right structure and thickness also depend on:

🔹 Product weight
🔹 Bag format
🔹 Filling process
🔹 Transportation conditions
🔹 Customer’s packing equipment

There is no single “standard” structure for every 10kg or 15kg bag.

🏗️ Bottom construction

For 10kg+ bags, the bottom carries a significant part of the load.

It can directly affect:

🔹 Load-bearing performance
🔹 Bag stability
🔹 Drop resistance
🔹 Palletizing performance

⚙️ The filling line matters too.

The same packaging structure may perform differently depending on filling equipment, filling speed, sealing conditions and product characteristics.

Packaging needs to work with the production process, not just on paper.

♻️ And what about sustainability?

Many brands are looking at Mono-PE, Mono-PP and other recyclable structures.

But for 10kg+ pet food packaging, recyclability cannot be considered separately from mechanical performance.

The challenge is to balance:

Recyclability + Mechanical Performance + Product Protection + Cost

The goal is not simply to make the bag recyclable.

The goal is to make it recyclable while still performing in the real world.

🐾 For large-format pet food packaging, I believe we should start with the product and its journey, rather than simply starting with a material.

Product → Filling → Sealing → Palletizing → Transportation → Warehouse → Consumer

Packaging is not just about holding the product.

It’s about making sure the product arrives safely.

♻️ Recyclability vs. Packaging Performance: How Should We Choose?“Can we make this package recyclable?” is becoming a co...
18/09/2026

♻️ Recyclability vs. Packaging Performance: How Should We Choose?

“Can we make this package recyclable?” is becoming a common question in flexible packaging.

But there is a more important one:

“Can it be recyclable while still delivering the performance the product needs?”

Packaging is not simply a material. It is a protection system. 🛡️

Depending on the application, it may need:

🔹 Oxygen & moisture barrier
🔹 Light & aroma protection
🔹 Puncture & tear resistance
🔹 Seal integrity
🔹 Drop & compression strength
🔹 Shelf life

The balance is different for every product.

🍵 Tea is a good example.

PET / AL / PE has long been used because aluminium foil provides excellent oxygen, moisture and light protection.

Today, customers are exploring MDOPE / EVOH / PE and other mono-material structures to improve recyclability. ♻️

But these may not deliver the same barrier performance as aluminium foil.

Instead of asking, “Can we replace aluminium?”, we should ask:

“What barrier level does this product need for its intended shelf life?”

☕ Coffee presents a similar trade-off.

Oxygen, moisture and aroma are critical. A more recyclable structure is not necessarily the right solution if it compromises shelf life or product quality.

🐾 Pet food is different again.

For 10 kg, 15 kg or heavier bags, mechanical performance becomes critical:

💪 Puncture resistance
💪 Bottom strength
💪 Seal integrity
💪 Drop resistance
💪 Handle performance

A recyclable structure still needs to survive the real world.

🇪🇺 PPWR will make this discussion even more important.
As brands evaluate Mono-PE, Mono-PP, EVOH and MDO structures, recyclability, barrier, mechanical strength, shelf life and cost need to be considered together.

So how should we choose?

Start with the product, not the material.

Ask:

1️⃣ What shelf life is required?
2️⃣ What OTR and WVTR levels are necessary?
3️⃣ What mechanical strength is needed?
4️⃣ What are the filling and sealing conditions?
5️⃣ What regulatory requirements apply?

Only then should we compare PET / AL / PE, PET / ALOX / PE, PET / EVOH / PE, MDOPE / EVOH / PE and Mono-PE / Mono-PP.

There is no universal “best” material.

The right choice is the structure that fits the specific application.

⚖️ The goal is to balance:

Performance + Recyclability + Product Protection + Cost

As packaging suppliers, our responsibility is not simply to say, “This material is recyclable.”

We should explain what it can do, what may change, and what needs to be tested.

🌱 Sustainability should not mean choosing between environmental responsibility and packaging performance.

The real goal is to optimize both.

♻️ Recyclability should not replace packaging performance. It should be engineered together with it.

That, in my view, is where the next generation of flexible packaging needs to go.

hashtag hashtag hashtag hashtag hashtag hashtag hashtag hashtag

29/08/2026

Sometimes, a small act of kindness reminds us what it means to be human. ❤️🐾

In 2016, something remarkable happened in Almaty, Kazakhstan.

A dog had fallen into the Sairan Reservoir and was unable to climb back up the steep concrete wall. A young man went down to rescue the dog, but soon found himself trapped as well.

Then something beautiful happened.

A group of strangers stopped.

They joined hands and formed a human chain, carefully making their way down the steep slope. One person held onto another, and another held onto the next ----- until they finally reached the man and the frightened dog.

Together, they pulled them both to safety.

No one asked who owned the dog.
No one asked whether it was worth the risk.
They simply saw a life that needed help ----- and they helped.

Almost ten years later, in March 2026, this moment was turned into a public art installation in Almaty, permanently capturing those people reaching out to one another.

But to me, the most powerful part of this story isn't the sculpture.

It's the dog.

Because sometimes animals remind us of something we, as humans, can easily forget:

Kindness doesn't need a reason.
Compassion doesn't need a language.
And love doesn't always need words.

That little dog didn't know those people's names.
It didn't know where they came from.
It didn't know whether they had anything in common.

It only knew that someone came to help.

And perhaps that's one of the most beautiful things about the relationship between humans and animals.

They don't judge us by our job, our wealth, our background, or our status.

They simply respond to kindness with trust.

Maybe that's why stories like this stay with us.

Because in a world that can sometimes feel divided, a group of strangers reaching out to save a dog reminds us that we are still capable of coming together for something that cannot repay us.

Sometimes, being human is simply about reaching out your hand.

And sometimes, that hand is all another life needs. ❤️🐶

Be kind.
Help when you can.
And never underestimate the difference one small act of compassion can make.

16/08/2026

Mono-material Packaging: The Future Direction of Sustainable Pet Food Packaging

The packaging industry is moving toward a more sustainable future, and mono-material packaging is becoming one of the key solutions.

So, what is mono-material packaging?

Unlike traditional flexible packaging structures such as PET/PE or PET/AL/PE, which combine different materials, mono-material packaging is mainly made from a single polymer family, such as PE or PP. By simplifying the material structure, these packages are easier to sort and recycle within existing recycling streams.

Typical mono-material solutions include:

• PE-based structures: MDOPE/PE, BOPE/PE, and high-barrier PE solutions
• PP-based structures: BOPP/CPP and other PP mono-material structures

For pet food packaging, especially dry pet food bags, PE-based mono-material solutions are becoming increasingly popular because they can provide excellent flexibility, sealing performance, durability, and improved recyclability.

This trend is also closely connected with the European PPWR (Packaging and Packaging Waste Regulation), which is driving the packaging industry toward more recyclable-by-design solutions. Brand owners and retailers are actively looking for packaging that can reduce material complexity while maintaining product protection.

However, sustainability does not mean simply changing the material. A successful packaging solution must balance recyclability with real performance requirements, including oxygen barrier, moisture protection, mechanical strength, and shelf-life performance.

As a flexible packaging manufacturer, we continue to develop mono-material solutions for pet food, food, and other industries ---- helping our customers move toward a more sustainable packaging future without compromising quality.

25/07/2026

Happy Employees Create Happy Products

At our company, we have always believed that only happy employees can create products that make customers happy.

Packaging is not just about materials, machines, and production processes. Behind every pouch and every bag, there are people who carefully check details, solve problems, and put their responsibility and passion into every step of the work.

A positive working environment inspires creativity, teamwork, and a stronger sense of ownership. When employees feel respected, valued, and motivated, they naturally pay more attention to quality and service — because they are not just making products, they are creating trust with our customers.

For us, taking care of our team is also a way of taking care of our customers.

A happy team brings positive energy to the factory.
Positive energy creates better products.
Better products build stronger partnerships.

We believe that behind every successful customer experience, there is always a happy team working together. ☺☺☺

20/07/2026

Backed by comprehensive certifications, our products are exported worldwide, supporting diverse international trade partnerships. ☺☺

18/07/2026

Saturday shipment in progress. 🚛🚛🚛

While many people are enjoying the weekend, our warehouse team is busy loading containers to keep our customers' supply chains moving. 💪💪💪

We know that on-time delivery is just as important as product quality. Whether it's a weekday or a Saturday, we're committed to meeting shipping schedules and delivering reliable flexible packaging to customers around the world. ☺☺☺

A big thank you to our production and logistics team for their dedication and hard work. 🙏🙏🙏

Every shipment reflects our promise: Quality packed. Delivered on time.

Address

龙港市
Wenzhou
325800

Telephone

+8657759966052

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