grodex Cold Paste Chemical Free - Starch Based Pasting Powder

grodex Cold Paste Chemical Free

grodex CP/NU is a pure starch based product made without caustic or any other chemical.

It gives very fast drying, guaranted moisture resistance in any weather/climatic condition, improves B/S, C/S substantially to allow corrugator to maintain very high B/S & C/S. even with lower gramage or lower B/F Papers.

No Marking on virgin papers is guaranted. It is food/pharma grade glue which guarantees no fungus & no pin rusting. Suitable for deep refrigeration & exports.


MOLECULAR WEIGHT 504.438 g/mol
APPLICATION Cold Process Pasting in Corrugated paper Board Industry
BASE Maize Starch (Vegetable Base) 100% ECO Friendly.
VISCOSITY On Ford Cup No. 4, 1: 4 water mixing ratio Viscosity 40 to 45 seconds, at solids 20%
WATER SOLUBILITY 99% water soluble.
PH 6 to 6.7
SHELF LIFE Shelf Life of Powder is 12 months from the date of manufacturing.
POT LIFE Pot Life of liquid Gum is 120 hours if kept hygienically.
Do Not Add any Chemical The product has been given anti fungus treatment in the manufacturing process itself and therefore actual users are requested not to add any Anti Fungus Chemicals to it. Such addition may reduce viscosity and Pin Adhesion of the gum
Drying & Plasticization Moisture Regain etc

This is chemical free neutral pH Moisture Resistance Powder Adhesives as grodex gum is free Caustic free & its Film gets Plasticize on complete Drying & Prevents Moisture to Revain & this not only increase BS and PS of Box but Maintains it for every most of the Adhesives available in the market are Caustic Soda base.

Therefore boxes made of Caustic gum will have tendency to catch moisture even though dried completely in the manufacturing process. Such boxes are likely to catch moisture under following circumstances -

  • 1.If Boxes are kept in Deep Fridge where humidity rises.
  • 2.If Boxes are kept uncovered in rainy conditions.
  • 3.In High seas/containers (Exports) where humidity goes too high.

Addition of moisture after actual packing of final finished goods in it,will cause lower compression. Boxes are likely to collapse resulting in damage to packed finished goods in it.

If box regains moisture, it may cause fungus growth on the surface of the box, as humid surface creates conjugal atmosphere for fungus growth.

To avoid this problem you can use Dextrin based neutral gum powders which do not catch moisture on complete drying,in any weather conditions.

We also certify that we have not added any chemical, of any kind, acid or alkali in the said product before, at the time and even after manufacturing process. This is just a combination of Highest Quality Starch, roasted at different temperatures in different stages, to make it water-soluble and to develop viscosity.


All above information is based on findings in our laboratory and results may vary at the actual floor level at the time of its consumption, depending upon hardness of water, heat and humidity in the atmosphere, cleanliness of the gum vessel, gum trey and gum roller.

How To Make

First take entire 4 units of water in a vessel mounted by High speed stirrer. Start stirrer and add gradual flow of cold pasting powder. Do not put entire 1 unit of powder at a time to avoid lumps formation. After putting 1 unit of pasting powder in to the water, make sure that there is no lumps formation and entire powder has been dissolved in to water.

You will get a dark golden brown solution from it. Continue stirring for at least 15 minutes to ensure highest solubility and maximum solid percentage. Ensure viscosity on B-4 cup as 30 to 35 seconds. Check Solids. It has to be 20%.


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Frequently Asked Questions

Corrugated paper box is used mainly for shipping / transportation and storage of variety of items for their strength and durability. In the process of making box mainly paper and gum adhesives are major players which determine strength of the box. More moisture in the box will cause lower compression strength of the box. Lower compression causes collapse of stacked boxes and thus damage to the goods packed inside.

So control of moisture in corrugated box means controlling moisture in paper and in gum adhesives used in box making.

1.Controlled moisture in paper.

The major component of paper, cellulose fiber, is hygroscopic in nature and therefore tends to absorb moisture from a damp or humid atmosphere or release moisture in dry atmosphere. When paper gains moisture corrugated box loses its bursting strength (BS) and compression strength (CS) and when it loses moisture corrugated box develops the cracking or board breaking problem.

To avoid this cracking of corrugated sheets use of sprayer to spray water onto base paper, changing of machine speed and adjustment of the flexible paper-lead roller to cut preheat area are required. Avoid exposure of paper reels in open sun heat which will bring down paper moisture substantially to cause cracking of corrugated sheets at the end.

To overcome excess moisture in corrugated board use of correct paper cob, changing machine speed, use of preheaters etc. are some of the solutions.

2. Moisture control through gum adhesives

Gum adhesives play major role in avoiding excess moisture in corrugated box. Type and quality of starch used in adhesives, type of fillers used, modifications to starch and chemicals used in the gum adhesives are major players in causing excess moisture in corrugated board.

a) Gel temperature of gum is important in automated plants and in single face. High pin adhesion at low temperature gives complete dry liners and board. If gum fails to get gelatinized immediately when it reaches heaters at the set speed of machine, it fails to develop stronger bond adhesion and develops the tendency of gaining moisture from atmosphere in later stage even after complete drying.

b) Type of starch used and specific modification to starch to develop moisture resistance are very important factors. Usually hydrolysis of starch with the use of acid and then use of strong alkali to get viscous gum is a common product which is available in the market. These type of adhesives are bound to gain moisture in damp atmosphere and humid climatic conditions. Special modification treatment to high quality starch to develop moisture resistance is required.

c) Different fillers are used in gum adhesive making to bring down cost and make our adhesives cheaper in the market of competition. Very low cost fillers such as different flours, clay, Urea etc. are used which pay no role in gum quality than reducing price substantially. Flour, clay or urea are more of hygroscopic in nature and cause more and more moisture gain whenever gets opportunity.

d) Chemicals used in gum adhesives such as Sodium Hydroxide (caustic soda) is highly hygroscopic and not only absorbs moisture but carbon dioxide, sulfur dioxide in the air. It is also highly deliquescent and absorbs moisture to form an aqueous solution. More moisture means lesser bursting and compression strength which results in collapse of stacked boxes.

Grodex Moisture Resistant Powder adhesives are made of finest quality of different types of starch. A unique modification process with the state of art technology develops complete moisture resistance in adhesives. These products are not only Sodium Hydroxide (caustic soda) free but no other chemical is used in it make it eco and worker friendly. These are proved adhesives for moisture resistance all over the world over past several years for guaranteed moisture resistance and control in corrugated paper board industry. Use of these adhesives will solve not only your moisture problems but will provide you totally new thinking line of grabbing huge hidden profits from your box in a very competitive market.

Powder Adhesives For Corrugated Paper Boards