Vinyl coating is a plastic exterior coating for the house, used for weather decoration and weather, imitating wooden planks, boards and battens or shakes, and used as a substitute for other materials such as aluminum or fiber cement. It is an engineering product, manufactured mainly from polyvinyl chloride (PVC) resins. In the UK and New Zealand a similar material is known as uPVC weatherboarding.
About 80 percent of the weight is PVC resin, with the remaining 20 percent being the material that gives color, opacity, gloss, impact resistance, flexibility, and endurance. This is the most commonly installed exterior coating for residential construction in the United States and Canada.
Video Vinyl siding
History
The vinyl coating was introduced to the exterior market in the late 1950s as a substitute for aluminum wall coatings. It was first produced by an independent owned manufacturing plant called Crane Plastics in Columbus, Ohio. This process is initially carried out by mono-extrusion, a process of forming a profile from one material to a desired shape and size. At that time, color mixing was done manually.
This initial process makes it difficult to produce and install consistent and quality products. Beginning in the 1970s, the industry changed its formulation to improve product production speed, impact resistance, and various colors. In the next decade, vinyl siding continues to be steady in popularity largely due to its durability, flexibility, and ease of maintenance.
Maps Vinyl siding
Modern creation
Today, vinyl siding is produced by co-extrusion. Two PVC layers are set in a continuous extrusion process; the top layer is a weatherproof and durable material, which comprises up to 25% of the thickness of the siding. The capstock may include about 10% titanium dioxide, depending on the color, which is the pigment and provides resistance to damage from UV rays. The vinyl wall coverings exposed to the sun will begin to fade with time. However, the level of fading is slower with vinyl than most other cladding. Most manufacturers offer a 50-year guarantee that their products will not fade during that time period. In the past darker colors tend to fade more than the lighter, but advances in technology and materials can mean this is no longer the case.
The lower layer, known as the substrate, is typically about 15% of limestone soils (most of which are calcium carbonate). Limestone reduces costs, and also balances titanium dioxide, keeping both extrusion streams equally fluid during manufacturing. A small amount of tin mercaptan or butadiene is added as a stabilizer to chemically bind any hydrochloric acid released to the PVC material as the limiting age. Lubricants are also added to assist in the manufacturing process.
Product specifications and variables
Vinyl wall coatings can be observed in a wide range of product qualities realized in substantial thickness differences and durable durability. The thickness may vary from 0.035 "in a cheaper siding product to.052" in the highest grade product that varies from manufacturer to manufacturer. Today, the commonly used thin vinyl layer is 0.40 ", and is known as the" builder class. "Vinyl products can vary in thickness even in one manufacturer to 0.010" thickness through various product lines offered ranging from base to premium. product-upgrade. The thicker vinyl products, usually realized at a higher, more rigid cost that can add to the aesthetic appeal and look of installed, inherently flexible products and also add to life and durability. The thicker values ​​of vinyl coating may, according to some, indicate more resistance to the most common complaints about vinyl siding - the tendency to crack in very cold weather when being hit or hit by hard objects while others feel that Thinner products can allow more 'flexibility before cracking' and are the subject of debate. However, on the "This Old House" website, statements about thickness and crack resistance are debatable. They claim to know the test results that show the chemical makeup has a greater effect on the impact resistance than the thickness.
Chemical formulas can also vary from manufacturer to manufacturer which may affect life expectancy as a formula and may be the manufacturing process can be one of the most important in terms of product quality and durability. One important finding is the UV "coating", which is used by some manufacturers applied to the surface of the product filtering the UV spectral rays from the sun that would otherwise lower PVC faster.
Vinyl wallcoverings are made with their own partial locking or locking system coupled with 'loose' nails tying the product to the outer wall. This locking system can be either rolled or extruded keys depending on the manufacturing process, one of which has its own design considerations. This locking system, either extruded or rolled has a lock down that locks into either the initial piece or to the top of the panel key below. The top lock is then 'loosely' nailed to hold the panel against the wall. These loose spikes allow buoys created by expansion and contraction of various temperatures and weather conditions. With well-designed mounting, and proper installation of 'proper loose polish', coatings can be easily extended, down, entered and exited, and left and right without any restrictions. Vinyl siding, by its nature, will tend to expand and contract more with extreme temperatures than other common types of cladding.
Environmental aspects
The vinyl coating has a chlorine base, making it slow to burn and fireproof. All organic materials (that is, anything that contains carbon) will burn, but the higher the temperature the material must reach before it burns, the safer it is. PVC will not light, even from another fire, until it reaches about 730 ° F (387 ° C) and will not ignite itself until approximately 850 ° F (454 ° C). The ignition temperature is significantly higher than that of common framing wood, which burns from fire at 500 ° F (260 ° C) and self-ignites at 770 ° F (410 ° C). In addition, ASTM D2863 tests indicate that the rigid PVC Barrier Oxygen Index means that it needs very high amounts of oxygen to burn and stay on. Rigid PVC (vinyl coating) will not independently maintain air combustion with normal oxygen concentration (about 21 percent) - making it easier to quench it.
Concern by the Organization
Due to its thin profile, vinyl siding may be more likely to flare due to exterior flame; for example, the National Institute of Standards and Technology found that, in tests involving vinyl-wrapped structures at close range, the observed fires spread between two vinyl-clad test structures located six feet apart in less than five minutes. In addition, vinyl siding can release toxic fumes on fire, especially dioxin, and smoke containing high amounts of hydrochloric acid. It's not just an environmental issue, but the smoke can be dangerous for firefighters and the people around it, and the toxic fumes released can increase the chance of death by inhaling smoke for anyone caught in a burning structure.
The National Association of Home Builders (NAHB) recommends the use of building materials that require "no additional resources to complete on site applications" for green home builders as they reduce waste and materials used. Installing vinyl coatings does not involve paints, stains, or falling asleep and therefore fulfills this NAHB requirement. Although vinyl siding actually requires falling asleep to seal the seams in which the J coating (the edges of the sliding lines slide into) fills the windows and doors.
The Environmental Building News validates the issues raised by Greenpeace and says it is not the only organization with environmental and health concerns about vinyl. They emphasize the risk of additives such as DEHP plasticizers.
The position of the International Fire Association, which represents firefighters in the US and Canada is: "Due to its intrinsic dangers, we support efforts to identify and use non-risk alternative building materials to fire fighters, build occupants or communities."
Health Problem
PVC used in vinyl siding was used to be manufactured in open vats until 1971, when angiosarcoma, a rare liver cancer, was traced to vinyl chloride exposure among PVC workers, and the limits of strict workplace exposure stipulated by the Occupational Safety and Health Administration. This change requires that all barrels be sealed, leading to greater capital costs and concentration in the number of producers.
References
Source of the article : Wikipedia
0 Comments