La description
Why to use slip agents ?
Due to a high coefficient of friction, polyolefin films tend either
to adhere to themselves or to the production equipment during film
processing.
Slip additives modify the surface properties of polyolefin films
and reduce the film to film friction (e.g. on a roll) and the
friction between the film and other surfaces with which they come
into contact.Â
Slip agents therefore:
- facilitate increased line speed in the manufacturing
processÂ
- enhance packaging machine operations due to reduced CoF
(coefficient of friction) values
You will find out what are the principles of action, what types of
slip additives are commonly used for polyolefins and what is their
structure and finally, how friction between films or between film
and production/packaging equipment can be reduced. To help you to
find the right slip agent for your desired application, we are
offering practical recommendations.
Principle of action
Slip Effect is a term used to describe the sliding of parallel film
surfaces over each other or the sliding of film surfaces over
substrates. Slip agents - such as stearamide, oleamide and
erucamide - are added to polyethylene (PE) or polypropylene (PP)
films during the extrusion process to decrease friction - both
film-to-film friction and that between the film and production
equipment - in order to increase the output of the line and to
improve packaging line operations. Slip effect is measured as CoF
(Coefficient of Friction).Â
Decreased CoF is a result of the migration of slip additive to the
film surface due to the defined incompatibility of the slip
additive with the polymer. The migration speed of slip agent to the
surface is largely decided by the additive's chain length
(compatibility with the polymer) and the crystallinity of the
polymer. The larger the slip agent (more carbon atoms) the more
compatible it is with the polymer and the slower it migrates. So
oleamides migrate faster than erucamides.Â
Erucamides are more heat stable than oleamides, more resistant to
oxidation and create fewer volatiles during processing. This means
that erucamides are more suitable for higher processing
temperatures and processes with high output, which will result in
high quality final products. Structurally, PE is less crystalline
than PP, so encourages faster migration of the slip
additive.Â
Due to the migration of the slip agent to the surface of the
polyolefins, primary amides are not only used as slip agents for
polyolefin films but are also recommended for use as demoulding
agents in injection moulding applications.
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| Pays: |
Vietnam |
| N ° de modèle: |
-
|
| Prix FOB: |
(Negotiable)
Obtenir le dernier prix
|
| Localité: |
- |
| Prix de commande minimale: |
- |
| Commande minimale: |
1000 Kilogram |
| Packaging Detail: |
Packaging is packaged in quantities 25kgs PP woven |
| Heure de livraison: |
15 - 30 |
| Capacité de Fournir: |
20000 Kilogram per Week |
| Payment Type: |
T/T |
| Groupe de produits : |
- |
