For steel and aluminum coils, surface quality is not just an aesthetic issue; it can affect product value, processing, and customer satisfaction. Friction, dust, pressure, humidity, and contact with various surfaces may occur during loading, storing, and transportation of coils. Any scratches or abrasions may turn into real troubles.
It is here that Steel Mill Kraft Paper will be able to play the role of protection packaging. Properly chosen and applied, it serves as a barrier for the metal surface from any contact. Shittla Paper Global concentrates on paper solutions that take into account the needs of industrial packaging.
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Where Does Surface Damage Actually Begin?
A metal coil will be subject to numerous factors that can cause damage to the surface before it gets to its final destination. As the metal coil goes through coiling, slitting, lifting, stacking, wrapping, and transport, the surfaces may come into contact with:
- Direct contact with other metal surfaces
- Friction while being moved
- Pressure from the packing and stacking process
- Accumulation of dust and dirt
- Rough handling when being loaded and unloaded
- Moisture and changes in environment
- Contact with strapping, machines, and other packing materials
The problem here is not only to cover the coil. The packaging material should provide a barrier between the surface of the metal and the source of abrasion.
The Protective Layer Between Metal and External Contact
One of the roles of the Steel Mill Kraft Paper is to serve as a physical barrier between the surface of the coil and the surroundings.
If the paper is wrapped in the appropriate manner, either between or around metal surfaces, then it would help reduce the friction between surfaces by ensuring that there is no direct contact while handling or transporting. However, this does not mean that the metal becomes scratch-proof from using the paper; instead, it adds one more layer to the existing protection process.
Strength Matters When Packaging Heavy Coils
Protective paper should stay intact throughout the processes of wrapping, handling, storage, and transportation of the product. Weak paper might break while wrapping the product and leave some sections of the metal surface uncovered.
The specifications for the Steel Mill Kraft Paper are as follows: GSM of 45, bulk of 1.15 – 1.18 cc/gm, and burst factor of 30 ± 2. Such characteristics are helpful in considering the suitability of paper for use in industrial packaging.
Paper that has appropriate physical strength might help ensure uninterrupted wrapping of the surface to be protected.
Smoothness Helps Reduce Unwanted Surface Interaction
Paper surface properties have their importance too. The specification provided suggests a smoothness of 160–200 ml/min. The smoothness is an important factor when the paper is put in contact with the surface of a finished metal, since the surface properties of paper may affect the interaction of both materials in motion.
As for the coil packaging, the idea is to choose a paper that will cover the metal uniformly without adding any rough surfaces or loose particles that may cause trouble. Nevertheless, the actual performance will depend on many other factors too.
Moisture Protection Starts With Understanding Absorption
There are also issues other than scratches associated with storing and transporting the coils. Moisture can be another factor affecting metal items, especially where packaging is subjected to humid conditions or condensation.
The specifications document mentions the Cobb rating of 30–35 g/m². This is an assessment of the water absorbability of the paper carried out in certain laboratory conditions, and the results are indicated in grams per square metre.
This doesn’t indicate the absolute waterproofing of the paper. Instead, the rating allows for determining how the paper behaves with regard to water, and if it is suitable for the particular application.
In the case of moisture-sensitive coils, the whole packaging concept should be devised considering the storage conditions, transportation time, humidity, and other factors.
Consistent Paper Performance Supports Safer Handling
One of the other key considerations is consistency. According to the specification sheet, the paper has a breaking length of 7,000-7,500 metres in MD and 2,700-3,000 metres in CD, in addition to a brightness value of 77-78% and porosity of 60-70 ml/minute.
These specifications help industrial buyers assess the paper’s physical and structural properties, rather than selecting packaging material based only on GSM or cost. In the case of coil packaging, consistency of the paper makes the process easier and more predictable.
Which Coil Industries Can Use This Protection?
Steel Mill Kraft Paper may be used wherever there is an application that requires separation and protection of steel/aluminium coils, sheets, and other metal surfaces. Some possible industries that might use the product include:
BALCO, Jindal Aluminium, Hindalco, NALCO, SAIL, TSDPL, Fortran Steel, KISCO Steels, Asiamet Steel Industries, and Panchdeep Metal Corporation. The particular type of paper must always be chosen based on the coil type, surface finish, packaging equipment, and requirements for protection.
A Practical Solution to a Costly Packaging Problem
The basic reason behind creating Steel Mill Kraft Paper is very simple: to provide a safe barrier between metallic surfaces and their surroundings while being transported, packed, and stored.
Its value lies in a combination of various characteristics rather than in one particular specification only. GSM, bulk, burst strength, breaking length, smoothness, porosity, and water absorptiveness help us comprehend the behavior of our paper in an industrial packaging environment.
At Shittla Paper Global, we understand that successful industrial packaging starts from comprehending the problem that needs to be solved. If the problem is about scratches, abrasion, contact with the surface, dus,t or damage caused by handling, then the right kraft paper can become an integral part of the protection solution.
