Ingredient in glue pest

pest - http://en.wikipedia.org/wiki/Pest_(organism)

paste - http://en.wikipedia.org/wiki/Paste

_{Slaps head with palm of hand.} PASTE!!!!!!!!!!!!!!!!!!

Thanks, JohnDG!

Oh, what was the question?

Use hot glue (heatpest?) I know you might have a problem with supply were you are but I think you would be better off with this kind of adhesion. That's what I would use for cartons any way. Good luck, Ky.

hi sandeep,

apparently, you are using 2 types of paste (glue) in 2 processes (machine and hand) on the same material (carton).

the blackening you are observing in hand glued cartons can be from the dirt and dust in the area where the glue is applied, or it can also be due to handling after the glue was applied, among other things. did this blackening happen only recently? if so, try to find out what changes were made in the work area, in the glue, in the process, etc. you might be able to pinpoint where the problem is coming from.

if the blackening has been observed for a long time already, and you're saying the other paste from the machine has no blackening problem, maybe you should be consistent and use the same paste for the hand process.

HTH!

- langyaw

Great answer biorami.

Humidity if uncontrolled is a major contributor, as well.

Please see the entry for stachybotris in the following:

http://concreteproducts.com/mag/concrete_arresting_mold/

(I realize you are not talking about concrete... but this is very informative site on mold.)

milo

Thank you sir

what do you mean by brounish hand?

I think that fungicide or copper oxychloride will solve the problem.

If your hand glue is having alcoholic spirit odour and looks brownish it should be rosin based or phenol formaldehyde based. These resin will harden on exposure to light and air and gets oxidized and harden, which is an inherent property of such resins.

The simplest way id to keep the lid closed, use opaque black containers to avoid light exposure. This also prevent the solvent evaporation.

The other remedy is to add antioxidants like small amounts of chlorinated solvents like Di chloro ethylene, TCE, CCl4 etc, which will inhibit oxidation of resin and hardening.

Make an effective choice.

Sandeep,

To help you better on the decision making part to identify the nature of the hand glue you are using please check with the following.

Take pure water in glass tumblers.

1] Add few drops of the hand glue and mix it to water present in the glass.

*If the gum readily solublizes or dissolves well it is an indication that it is of natural water solubletype. The preservatives suggested should work. Such bacterial decay and loss of viscosity are factual and can not be totally avoided.

*iF the gum disperses with turbidity and smells like almond it could be rosin based glue in solvent. Keep it air tight and use back non transparent containers. Even avoid using iron/ metal rods for handling. You may add minor quantities of chlorinated solvents suggested to avoid hardening.

* If he glue floats with globules formation, it could be Phenol Formaldehyde based resin in solvent . Check for spirit odours. Here again same close and light proof care with small amounts of chlorinated solvents should work.

* One more simple check list is add drops of glue on white paper, subject it to open air sunlight and observe and report behaviour. It could be a simple common sense proof to verify the suggestions.

Regards.

Dear S.udhayamarthandan, If you are in India I can send you sample of paste. Please give me your address or contact details if possible.

Dear Sandeep,

I am based at INDIA in Tamilnadu. You are most welcome to contact me with your details at the following e mail ID- ankaizent@yahoo.co.in . It will be my plearure if my knowledge can help you to overcome your problems.

Regards

S.Udhayamarthandan

"You can use PVA based glues like PIDILITE which are solvent resin admixtures"

this is what I basically meant in Post #5. OP should observe consistency in using glue / paste material in their 2 processes (manual & machine) since it is being applied to the same material, i.e., carton.

GA, anyway.

Langyaw,

Greetings. How is your Black Algae problem status? Thank you for the evaluation. Shall meet again and again.

Regards.

Dear Sir,

What is the meaning of PVA based ?

PVA means two interlinked organic glue base thickeners.

1]Poly Vinyl Acetate- this is the basic ingredient of white adhesive pastes.Like the one you are using for machine glue.

2] Poly Vinyl Alcohol- Urea like globules which on addition to warm /hot water yields transparent jelly like glue, which can also be used as a water soluble adhesive.

1] Ploy Vinyl Acetate pastes are readily available from vast manufacturers and the resin mixed products are a bit costly but are superior adhesives.

2] Poly Vinyl Alcohol globules are readily available in various temperature grades like PVA-G17,117,170 etc,. the higher the suffix number more temperature is required for glue conversion. The usual concentration is around 12% powder for 100 ml of warm / hot water.

You may try out your choice based on adhesion strength required.