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Serhat Plastic Industry

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FREQUENTLY ASKED QUESTIONS

What is PVC?
PVC, "viny", (Polyvinyl Chloride) is a shortened version of the technical term and is a type of polymer produced in petrochemical plants with petrol (or natural gas) and salt, with the formula (CH2-CH2). This polymer, after being blended with other additional materials, is formed at very high temperatures and becomes plastic and may be used. PVC, is one of the rare thermoplastics which contains and chloride atom in it's polymer chain. Because it contains chloride, PVC can only catch flame only at high heat and will quickly burn out on it's own. At very high heat PVC can be broken down thermally very easily and will release corrosive hydrochloric acid gas. PVC, compare to other polymer, can be combined with a higher number and more variety of additional materials. SA a result, the cost of PVC plastic products are relatively lower; it allows a general and multi-purpose use. After polyethylene, PVC is the most widely-used type of polymer.


Where is PVC used?
PVC can be found in the construction sector (window frames, doors, shutters, water and waste pipes, wall-floor and ceiling coatings), the packaging sector (saran wrap film, corks for lid-interiors, bottles, and bags), various medical procedures (blood bags, serum tubes, surgical gloves and heart catheters), electrics-electronics production (high-voltage isolators, optic-fiber case envelopes), uses in the automotive field (glass piping/wiper systems, paneling, and floor mats), various other consumer products (toys, various sports equipment, covers, fake leather and shoes, even credit cards), basically it is used in virtually every part of out lives.
Is PVC environmentally-friendly?
1-PVC waste, like paper and glass waste, may be recycled (vinyl glass casings or other plastic products may be asses during certain stages of manufacture and can be re-used, in fact when brought to a fiber form it can even be used in the textile industry,

2-With the use of PVC in window casings, wainscoting and door manufacturing, the "timber substitution" lowers the cutting of trees and helps maintain the protection of forests. In this regard, PVC is "environmentally friendly", and "has taken on the task of protecting the environment".

3-PVC, just like all plastics, is light-weight. PVC is much lighter than timber. On the other hand if PVC is mixed with Aluminum of equal volume, PVC becomes nearly twice as light.

4-Another environmental addition of using PVC window casings, is the because of the good isolation it maintains, is that it saves on energy and lowers the output of various emission gases such as carbon dioxide, which are harmful to the environment. Energy consumption drop 30-50% when PVC material are used. The drop in energy consumed, also means relative drops in environmental pollution, and it opens the way for less gas emission and ash and more saved economically.
Does PVC cause cancer?
Information on this issue must be presented as (1) VC monomer and (2) additional material added.

VC monomer:
PVC, is made by polymerization of Vinyl Chloride (VC for short) produced in the first stages with petrol and salt. For approximately 20 years, it has been known that exposure to VC above a certain dose paves the way for a certain type of liver cancer. Because of this, in factories producing VC, in the gaseous areas no more than 2ppm's (2 parts per million) of VC are allowed. This amount, in more recent years, has been lowered to 1 ppm for safety purposes. It should still be noted, as a result of the advancing technology in this day and age, that all of the PVC factories in the world, are operated under controlled and closed systems, and are monitored constantly through advanced monitoring systems and there is no way contact or leakage of VC to the outside environment, it is not even a possibility. Thus, according to reports of the World Health Organization, there has not been any health problem found as a result of VC in any country since 1978. However, there is one matter that should be paid attention: if during the production of PVC, the polymerization process from VC is not done carefully, a certain amount of VC can be left behind in the produced PVC. With all rights, in the mind of the public one of the matters that causes the most anxiety is the possibility of the amount of VC left in PVC. However as it is in our day, after the polymerization process is painstakingly applied, the PVC which is acquired as a result is still run through a steam-vacuum and all of the possible risks are eliminated. The PVC which has gone through these process, will not cause any health problem whatsoever in terms of VC. It is still necessary for casing manufacturers to regularly monitor the amounts of VC found in the PVC they use.

Additional materials added:
PVC, before it is turned into casing for example, is added an "impact modifier" to improve durability, some (generally Barium, Cadmium, Tin and Lead based heavy-metal salts) "stabilizers and pigments" (generally Titanium based) to improve resistibility to heat and light; also additives an lubricants, "various additives materials" (for example, calcium carbonate coated in stearik acid), are used to improve the flow of operations. There is no special application applied to the surface of the PVC casing; however, to acquire special surface colors (for example, wood) some acrylic coats are applied to the surface. As it is already known, heavy metals and salts such as lead, are dangerous to the skin when deposited. In regards to the additives mentioned, especially lead which draws attention for being poisonous, these have been used in casing production since the 1970's and no side-effects have been reported to this day. On the contrary, PVC pipes which have been manufactured with lead compounds up to designated levels, are allowed for use in even our drinking water systems. PVC with the additive Cadmium, a known carcinogen, is known to be used as window casings, even in European Community countries which are extremely sensitive in the application of PVC. The casings have been said not to be toxic by the American Food and Drug Administration (FDA), and tin and zinc additives, which are used to improve the durability, are also included in this.
In short, all of the additives used in PVC, within the applied limits, have no side effects whatsoever on human health.
Do PVC doors and windows cause odors?
PVC windows and doors, are in solid form and are not expected to release any gas in room temperature. However, PVC window casings, where they are mounted, have been known to release and odor and cause some anxiety in this regard. As is with all new products, PVC casings, due to production and shipping and other similar reasons, may have picked up some odors although these are short-term. PVC casings, according to test results, are "exceptional" in regards to not leaking air and water; thus, any odor which is said to have occurred after assembly, as a result of this exceptional "leakage protection", cannot leak to the outside as it can with timber products and can in turn become stronger over time. For window with PVC casings, to open them from time to time and allow the room to air out is without a doubt a good idea.
How to clean and make maintance of PVC windows?
PVC windows and doors, are in solid form and are not expected to release any gas in room temperature. However, PVC window casings, where they are mounted, have been known to release and odor and cause some anxiety in this regard. As is with all new products, PVC casings, due to production and shipping and other similar reasons, may have picked up some odors although these are short-term. PVC casings, according to test results, are "exceptional" in regards to not leaking air and water; thus, any odor which is said to have occurred after assembly, as a result of this exceptional "leakage protection", cannot leak to the outside as it can with timber products and can in turn become stronger over time. For window with PVC casings, to open them from time to time and allow the room to air out is without a doubt a good idea.
How are PVC windows cleaned and maintained?
Plaster and paint renovations may be made after mounting PVC windows. If the protective tape is not removed, heat and sunlight may cause the tape to meld to the surface of the casing, so it is recommended that the tape be removed in cool weather. If the opposite is the case, it may be better to apply an oil that has been heated to 55ºC, let it rest for 4-5 hours, and then try removing the tape.

Paint and plaster that are stuck to the casings, should be carefully cleaned, but not scraped, immediately. It should be noted that detergents used to clean casings should not be too grainy, the liquid or cream should be preferred.

Contact with metallic liquids or soaps should be avoided. The PVC system should not be cleaned with solvents or bleach.

To avoid precipitation on the surface of construction elements:
1-The room temperature should be around 20-22ºC.
2- Areas such as the bathroom-restroom where water is frequently used should be aired-out by opening a window.
3- Steam produced while cooked should be aired-out with a stove aspirator.
4- Should be aired-out at least 4-5 times a day.
Source: www.pakpen.com.tr

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