Sealrust VCI ® Poly Products: Technical Information

“VCI” stands for “Volatile Corrosion Inhibitor”. When metal items are packed in “VCI Packaging Material”, the chemicals volatilise in the surrounding environment and form a protective Invisible Molecular Layer on the Surface of the Metal. This protective layer works as a barrier between metal surface and Corrosion-Causing Materials like Moisture, Oxygen, Dirt, Salt etc and thus Prevent them from Depositing on the Metal.

While Selecting VCI Poly Packaging Material, it is advisable to get technical information about VCI Plastics Packaging Material.

“Sealrust VCI® Poly Products” to be Used for Primary Packaging

For optimum protection from corrosion, VCI Poly Material should be used for Primary Packaging at the time of production of the metal parts, and it should not be used in combination with any other option of corrosion protection.

VCI Molecules Evaporate to Settle on the Metal Surface to form an invisible thin film to protect the metal from corrosive substances. If VCI Material is combined with any other type of rust preventive material, VCI active agent may not fully cover the object material by forming invisible film on it, thereby making such area vulnerable to corrosion.

Similarly, VCI active chemicals will not have any opportunity to form invisible protective micro film on metal surface if VCI material is used as secondary packaging material and other types of protective methods are used for primer packaging.

However, for maximum and long-term protection under worst climatic conditions, Same VCI Material Should be Used for primary as well as secondary packaging.

Advantages of “VCI Poly Products” over “VCI Paper”

“VCI Poly Material” has Many Advantages over traditional “VCI Paper Products” while being used as a packaging medium, for protection of metal surface from corrosion and rust. Some of the main advantages are as follows:

  •  In addition to providing Corrosion Inhibitor Properties, “VCI Poly” acts as Very Powerful Effective Moisture Barrier, which is not the case with Paper. In fact, Paper Absorbs Moisture, which results into Corrosion.

  • “VCI Poly Bags, Tubing and Sheets” are Transparent, and, hence, packed products can be identified without opening the package. These benefits are not available with “Paper Bags”.

  • “VCI Poly Bags Tubings and Sheets” are Dimensionally Stable, can be folded and are available in custom sizes and colours. Hence, “VCI Plastic Packaging” is suitable for all types and all sizes of metal products.
Difference between “VCI Poly” and “VCI Paper Products”

There are many benefits of using “VCI Polyethene Packing Material” as compared to “VCI Paper Products”. “VCI Paper” is manufactured by coating of “VCI Chemical” on Paper, while “VCI Poly Products” are produced by extrusion process using “VCI Ingredients” and “Master Batch”.

Thus, in “Poly Material” there is Uniform Distribution of “VCI Chemical” thereby giving more effective performance compared to “VCI Paper”.

“Poly Products” can be sealed as to form a safe and protective enclosure around the object. “Paper Bags” have to sealed using some adhesive, which itself may become source of corrosion due to Presence of Moisture in “Paper”.

“Paper” Absorbs Moisture and Humidity and, thus, becomes non-effective in course of time, which is not possible with “Plastics”.

“Poly Film” has much more superior Tear Strength than “Paper”.

Life span of Sealrust VCI® Poly Bags & Wrappers

Life span and effectiveness of “VCI Products” depends upon many factors such as packaging methods, transit & shipping conditions, metal parts to be protected and to what extent Guidelines for using VCI Products are followed.

Life of Sealrust VCI® Poly Products is considered to be Three Years in an Ambient Temperature.

This estimation is based on Salt Spray Test conducted in the laboratory as per ASTM B-117 for 1,000 Hours.

Effect of thickness of “Sealrust VCI® Plastics Products”

Effectiveness of “VCI Plastics Bags & Wrappers” remains almost the same, irrespective of the thickness of “Poly Products”. However, “Thicker Plastic Film” offers greater resistance to moisture transmission as compared to “Thinner Films”.

Hence, for better protection against corrosion, the thickness of the “Poly Film” should be selected from 400 to 800 gauge, depending upon duration of protection required.

Can “VCI active agent” be seen, smelt or felt?

“VCI agents” are neither visible nor capable being felt. As far as “smell” is concerned, it will, by and large, depend upon the nature of “active agents” used in “VCI product formulation” by the manufacturer.

Nature of “smell” or its intensity, does not give any indication about the presence of “active agent” or its effectiveness, in any “VCI Poly Product”.

Effect of colour variation in “VCI Plastic Packing Material”?

“Colour variation” inherent in the “VCI Poly Material”, in no way, affects its quality, performance or effectiveness. Similarly, nature of “smell” or its intensity, does not give any indication about the presence of greater or lesser dose of “active agents” or its effectiveness, in any particular “VCI Product”.

Sealrust VCI® Poly Material is manufactured in natural, golden yellow colour and royal blue colour, depending upon individual packaging requirements.

Appropriate method of closing “VCI Poly Bags”

Normally, “VCI Products” do not require airtight packing in order to work effectively. However, “VCI Products” Must be Enclosed Properly, so that air or moisture do not enter in the “VCI Bag” from the opened side of the bag.

Due to packaging constraints, if “VCI Poly Bags” are not sealed, then the metal parts should be Completely Wrapped or Enclosed, with “VCI Packaging Material”.

Difference between “Mono-extruded VCI Film” & “Co-extruded Film”

“Co-extruded VCI Film” contains “VCI Formulation”, which is chemical-blend of several ingredients, only on one side of the poly material, whereas “Mono-extruded VCI Film” contains “VCI Formulation” on both the sides of the plastics. That is why, studies have indicated that VCI Film Made by Mono-extrusion Process Shows Better Corrosion Protection Ability and has longer protection life cycle as compared to co-extruded material.

Sealrust VCI® Poly Film is manufactured by mono-extrusion process, by using superior VCI Technology and VCI Chemical Formulation, for long-term protection from corrosion.

Effectiveness of “Salt Spray Test”

“Salt Spray Tests” and “Humidity Tests” Provide Only Guidelines about effectiveness of “VCI Products”. Performance of “VCI Products” depends upon many factors such as storage, transportation and shipping conditions, surrounding temperature, humidity, and presence of Salt/Sulphur in the atmosphere. It is, therefore, necessary to Conduct Field Testing of VCI Products before deciding about its effectiveness and performance.

Recycling of Sealrust VCI® Poly Products

Scrap of Sealrust VCI® Poly Material can be Reprocessed, without any difficulty, into commercial (second) grade film, like reprocessing of any other polythene material. However, such reprocessed bags or sheets, should not be used again for “VCI applications” under any circumstances. The additives and master batch used during “VCI Plastic Material” cannot be recovered from the scrap of “VCI Material” during the recycling process.

“Sealrust VCI® Poly Products” are meant for “Industrial Use”

Sealrust VCI® Poly Products, manufactured and sold by Modi Poly, are meant for Industrial Use Only.

Useful Information about "Sealrust VCI® Anti-Corrosive Poly Products"
Range, Description & Availability of "Sealrust VCI® Poly Products"
Online Enquiry
Scroll to Top