Ningbo Sure Paper Co., Ltd.

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Ningbo Sure Paper Co., Ltd.

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Sure Paper supplies food packaging paper solutions from China, including PE coated cupstock, greaseproof paper, baking paper and custom paper cup fans for global B2B customers.

20/09/2026

THE PAPER MET THE SPEC. DID IT MEET THE MACHINE?

GSM ✓
Cobb ✓
Stiffness ✓
Barrier ✓

Everything looks right on paper.

But the machine sees something the TDS cannot:

tension
heat
pressure
speed
forming
sealing

A specification measures the paper at rest.

Production measures how the whole material system behaves under stress.

That is why the most expensive problem is not always a failed specification.

Sometimes it is a paper that passes QC—

but quietly creates:

more adjustment
slower speed
more waste
more rejects

When that happens, don’t immediately change the GSM or blame the paper.

Ask:

Where did the performance first change?

SPEC → MACHINE → GOOD UNITS

Because converters don’t make specifications.

They make finished packages.

18/09/2026

WHERE DID THE GREASE ACTUALLY GET THROUGH?

You see a grease stain.

The first reaction is often:

“We need a higher KIT.”

Maybe.

But first, look at where the grease started.

Was it the:

flat area?
fold?
crease?
cut edge?

Because a stain tells you there is a problem.

The failure point tells you where to start looking.

Before increasing the specification, find the weak point first.

FIND THE FAILURE → THEN CHANGE THE PAPER.

17/09/2026

Same paper. Same GSM. Different grain direction.

And sometimes — a very different cup.
MD/CD orientation can affect:
✓ Cup wall stiffness
✓ Rim curling
✓ Forming stability
✓ Dimensional consistency

So if a cup feels too soft or forming is unstable, don’t immediately increase the GSM.
Check the grain direction first.
Paper performance is not only about GSM.
It is about how the whole material works during production.

16/09/2026

THE CHEAPER REEL CAN COST MORE.
Two papers may have different prices per ton.
But what happens after they reach the machine?
More waste?
More downtime?
More rejected pieces?
Then the lower paper price may not mean the lower real cost.
**Don’t compare only USD/MT.
Compare cost per good unit.**

15/09/2026

THE COA SAID PASS.

THE MACHINE SAID NO.

Curl?
Poor feeding?
Unstable sealing?

Before blaming the reel, check:

Moisture.
Storage.
Coating.
Machine settings.

Because passing QC does not always mean stable converting.

Find the variable before you change the paper.

14/09/2026

SOFT CUP? DON’T ADD GSM TOO QUICKLY.

A heavier board may help.

But the problem may also be:

bulk
moisture
coating
forming
cup geometry

Before increasing GSM, find out:

Where is the stiffness being lost?

Because the converter doesn’t sell GSM.

The converter sells a cup that has to hold its shape.

13/09/2026

The KIT test passed. Are you finished testing?

Not if the paper still has to be converted.

A greaseproof paper may meet the required KIT level — but the converter should still look at:

✔ folding / creasing
✔ printing
✔ moisture
✔ machine behavior
✔ hot-food contact
✔ reel consistency

Because KIT measures one part of grease resistance.

The finished package has to prove that the whole material system works.

A better qualification route is:

KIT Test → Converting Trial → Finished Package → Commercial Production

Don’t qualify only the number. Qualify the application.

11/09/2026

BRING US YOUR FAILED CUP, NOT JUST YOUR GSM.

“250 gsm + 18 PE” is useful.

But it does not explain why the cup failed.

Maybe the seal becomes unstable at higher speed.

Maybe the wall loses stiffness after filling.

Maybe the reel starts curling after storage.

Maybe two papers with the same GSM behave differently on the same machine.

So before changing GSM or adding more PE, look at the actual failure.

Check the whole system:

**Paper structure

Moisture
Stiffness
Coating
Machine settings
Container design**

Because:

**The specification tells you what you bought.

The failed cup tells you what you need to fix.**

For converters, the better question is not only:

“What GSM should I use?”

It is:

“What does my production process actually need?”

What causes more trouble on your line — sealing, curl, soft walls or forming instability?

10/09/2026

Non-stick performance is not just about adding more silicone.

Also check:

✔ coating uniformity
✔ curing and adhesion
✔ base-paper moisture
✔ heat exposure
✔ release behavior
✔ curl and handling
✔ commercial-batch consistency

Because:

The coating is only one part of the result.

09/09/2026

Paper curling? Don’t blame the reel too quickly.

Curl can come from the paper itself — but also from what happens before and during converting.

Things worth checking include:

✔ moisture profile
✔ one-side PE or coating balance
✔ printing / coating / drying conditions
✔ warehouse humidity
✔ temperature differences
✔ moisture absorption after the reel is opened

So instead of asking only:

“Is the paper defective?”

ask:

When did the curl start?
Where did it start?
What changed before it happened?

Curl is a symptom.

The real job is finding the variable behind it.

For converters: what do you normally check first when a reel starts curling?

Address

ROOM 8-1-2, HONGTAI DIBIAO BUILDING B, NO. 55 HAIYAN NORTH Road, YINZHOU DISTRICT
Ningbo
315000

Telephone

+8617855832384

Website

https://www.surepaperpak.com/, https://www.sure-paper.com/

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