|
|
Vinyl windows and doors are madefrom a blend of PolyVinyl ChlorideResin (PVC) and a select blend of addi-tives.This mixture, commonly referred to as “compound”, is critical to achiev-ing the desired processing of the window and door profiles during extrusion and fabrication and imparting long term weatherability to the finished product.
PVC (PolyVinyl Chloride)
PVC is created from a mixture of petro-leum by-products and salt. Base stocks of ethylene and chlorine are combined in a polymerization process that results in a powdery substance that makes up approximately 85% of the “compound”.
In its purest form, PVC is susceptible to heat and therefore requires the addition of micro ingredients that supply the proper weatherability, impact resistance and durability that is required in vinyl window and door systems.
Stabilizers
Heat stabilizers are added to the PVC to prevent material degradation through the extrusion process. The weatherabili-ty of the end product is also increased allowing the window and doors to with-stand the effects of solar heating. A product that lacks sufficient amounts of heat stabilizers will become weak when exposed to the hot rays of the summer-time sun resulting in poor window oper-ation or a total unit failure.
Processing Aids
This ingredient influences the melting and fusing of the material through the extrusion process. They impart an elas-tic “toughness” to the material and cre-ate a uniform melt strength throughout the profile. Without a processing aid, the resulting vinyl window product would be more susceptible to failure due to lack of inherent strength
Impact Modifiers
These improve the impact properties of the vinyl profiles by reducing brittleness and increasing pliability of the end product. Without the impact modifiers, the vinyl material used in the fabrication of windows and doors would be unable to withstand the harsh effects of the processes used in fabrication and suscep-tible to cracking or breaking during installation and operation.
Lubricants
Lubricants affect the flow of the plastic through the steel dies during the extru-sion process. The lubricants allow the surface of the end product to be smooth and shiny, providing an added aesthetic appeal to every window.
Fillers
A filler generally consists of a fine pow-der of calcium carbonate. This ingredi-ent
influences several properties of the final product including impact strength,
elasticity, shrinkage and material cost.
Light Stabilizers
These are added to prevent fading and chalking. Fading is caused by ultra vio-let light from the sun and results in a dull finished surface. Chalking is when a white residue forms on the surface of the window caused by the release of tita-nium dioxide from within the profile.
Eventually, white streaks will form when rain washes this powder across a build-ing surface. By adding a light stabilizer, the amount of titanium dioxide can be reduced in the compound preventing the unwanted leaching.
Titanium Oxide
TiO2 is the primary pigment in vinyl formulations. It gives vinyl its brilliant white color and makes the product opaque. TiO2 also aids in the reflection of UV rays preventing heat build up within the profile and protecting the window from solar fading.
|
|
Acabas de entrar en la página principal de mi web. Aquí podrás encontrar diversas secciones interesantes que espero mejorar e incrementar con el tiempo..
|
|
Acabas de entrar en la página principal de mi web. Aquí podrás encontrar diversas secciones interesantes que espero mejorar e incrementar con el tiempo..
|
|
Acabas de entrar en la página principal de mi web. Aquí podrás encontrar diversas secciones interesantes que espero mejorar e incrementar con el tiempo..
|
|
|
|
Acabas de entrar en la página principal de mi web. Aquí podrás encontrar diversas secciones interesantes que espero mejorar e incrementar con el tiempo..
|
|
Acabas de entrar en la página principal de mi web. Aquí podrás encontrar diversas secciones interesantes que espero mejorar e incrementar con el tiempo..
|
|
|
