Lubricants slip additives

Removal of surface acting substances from plastics, e.g. lubricants, slip additives, such as stearamide, stearates, anti-static agents. 

Parkin [CasChem] Hydioxystearates or acetoxystearates wax modifier, emollient, mold release, lubricant, slip additive. 

Chem. Descrip. Multifunctional modified siloxane Uses W/o emulsifier base oil for metalworking fluids dispersant for aq. and org. systems release agent fabric softeners/fiber finishing film-former in lubricants, slip additives, release agents... 

Slip additives act at the surface of a polymer film or article to reduce the friction between it and another surface. In a variety of plastics, such as polyolefins, polystyrene, and polyvinyl chloride, fatty-acid amides are applied as slip additives. Fatty-acid amides, such as oleamide, stearamide, erucamide, and oleyl palmitamide, are added to plastic formulations where they gradually tend to bloom to the surface, imparting useful properties including lubrication, prevention of films sticking together, and reduction of static charge. 

Three theories were proposed to explain wall-slip (a) adhesive failure at the wall, (b) cohesive failure within the material as a result of disentanglement of chains in the bulk and chains absorbed on the wall, and (c) the creation of a lubricating surface layer at the wall either by a stress-induced transition, or by a lubricating additive. If the polymer contains low molecular weight components or slip-additives, their diffusion to the wall will create a thin lubricating layer at the wall, generating apparent slip. 

Additive used for thermoplastic applications requiring lubrication, slip and anti-blocking properties. Commonly used in polyethylene and polypropylene films, as a lubricant in polyvinyl chloride, mold release agent, dyestuff dispersant for printing inks and surface coatings, and a blending agent for polyamide resins. 

Use Slip additives for PVC and polyolefin resin films, antistatic and antifogging agent for clear plastic wraps, and as internal lubricants. 

Surface treatment can also affect the amount of bloom or surface migration of various active surface agents (lubricants, slip and antislip additives, etc.) and either subsequent migration into a product by surface abrasion or chemical removal, solubility, etc. 

Any additive is a potential source of change to the overall processability from pellet feed to melt rheology. The not uncommon operator comment that one particular color always runs well and another always causes problems is more likely to be fact than superstition. Many products are colored by using masterbatches. whilst extruded products may contain antiblock and slip additives. Injection moldings may contain lubricants to aid mold release or provide product lubrication, e,g., bottle caps. In many cases such nias-terbatches contain low-viscosity polymer waxes to promote additive dispersion (particularly pigments) and masterbatch distribution throughout the natural polymer. There are in fact many additives, including fillers, flame retardants, and antioxidants, that can influence processability. 

Given the low surface friction characteristics they impart, mold-release additives are related to slip additives used in extrusion, discussed in the next chapter. Some overlap with the migratory flow-enhancing lubricants mentioned above. Mold-release agents are typically based on one or more of the following chemistries ... 

There are migrating slip additives that are not of this two part structure. One additive is perfluoro-polyether (PFPE) synthetic oil marketed by DuPont under the trademark Fluoroguard , which is an internal lubricant that imparts improved wear and... 

Slip additives are incorporated directly into the polymer during the extrusion process. They work by migrating to the surface as the polymer cools, forming a solid lubricating layer at the surface, lowering the friction or reducing adhesion between contacting polymer surfaces and the polymer and other materials. 

Processing aids are typically surface-active agents that are added by the plastics converters/transformers to improve throughput and alter the surface properties of the finished article. Additives in this class include lubricants, slip agents, antiblocks, and mold-release agents (see Release Agents). 

Slip additives are used with packaging plastics such as polyolefins, polystyrene and PVC to impart lubrication, prevent films (such as cling-film) from sticking together and to reduce static charges. They are usually surfactants such as fatty add amides which have the desired rate of blooming to the polymer surface where their action is needed. 

Acrawax C Prilled or Beaded is an effective lubricant, processing aid, slip additive and pigment disperssuit aid for most polymers Including ABS, PVC, polypropylene, nylon, acetal, polyethylene and thermoplastic polyester. 

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