Monolithic polycarbonate - technical specifications, material properties and application
In modern construction are widely used transparent materials are often completely forming the appearance of the buildings.Along with the usual glass was spread and solid polycarbonate properties, and the use of which allows you to create unique constructions.This plastic has excellent technical characteristics, which makes it indispensable in the construction of buildings of different purposes.
- What is a solid polycarbonate
- ratio of solid polycarbonate temperature
- chemical resistance
- mechanical strength of polycarbonate ISO 527
- sheet thickness and specificWeight
- UV resistance
- fire performance
- Environmental parameters
- light transmission
- Resistance to moisture
- Colours panels
- Purpose and scope of the solid polycarbonate
- Complexityinstallation of structures made of reinforced polycarbonate
What is a solid polycarbonate
This material was first produced in the late XIX century as a byproduct in the synthesis of drugs for pain relief.There is a legitimate question: what is a monolithic polycarbonate, and what properties it possesses?It is insoluble in water and many other liquids, the compound of transparency can compete with high-quality silicate glass.
Monolithic polycarbonate specifications, which are at the highest level, belongs to the group of thermoplastics.The most widely used aromatic compounds synthesized from bisphenol A. In turn, the substance obtained by condensation of the relatively inexpensive components of acetone and phenol.This makes it possible to its widespread use in construction and other fields.
consumer polycarbonate monolithic supplied as a sheet material of thickness from 1 to 12 mm in a standard size 205 × 305 mm.By special request panels can be manufactured with different geometric parameters while maintaining the width.This limitation is due to the standard size of the extruder used to make the polymer.
Industrial production of polycarbonate reinforced in accordance with TU 6-19-113-87.This material provides the necessary characteristics for the following: tensile strength, impact strength and resistance to high and low temperatures.Currently nomenclature polycarbonates produced in our country and abroad, consists of dozens of names.
In this list the following grades of this material, different in some properties and characteristics:
- RS-005 and RS-003 refers to polymers of high viscosity, until recently, the PC-1.
- RS-007 medium viscous thermoplastic polycarbonates replaced the PC-2 and PC-LT-10.
- RS-010 material with a low viscosity before the designation PC-LT-12 and PC-3.
- PC-LT-18-m Thermo-stabilized panel, painted in black (until recently, PC-4).
- PK-5 - material specially designed for medical purposes, is used along with imported solid polycarbonate.
- PC-6 - Prices for optical instruments and lighting facilities.
- PC LST-30 - a material filled with silica or silica glass (the same notation LSV PC-30 and PC-NCC).
- PC-M-1 - panel with minimal friction surface.
- PC-M-2 - high resistance to the formation of cracks and excellent fire properties.Currently it has no analogues in the world.
- PC-TS-16-ML - material relating to the highest category of resistance to open flame and high temperatures.The panels are designed for designs with stringent fire safety requirements.
addition to the transparent solid polycarbonate panels industry offers consumers with a low level of light transmission in many colors.
ratio of solid polycarbonate temperature
Indicators resistance polymer panels to the climate conditions determined by the relevant Russian and international standards.Monolithic Polycarbonates has significant frost, allowed its use in the manufacture of outdoor structures.The latter can be used at temperatures up to - 50 ° C in the absence of mechanical stresses at - 40 ° C, this material is able to withstand even the impact.
Heat resistance of most brands of polycarbonates is up to + 120 ° C in individual samples of the figure comes to +150 ° C.As with all materials upon heating the polymer increases in size, the coefficient of thermal expansion is determined by a special technique.For polycarbonate reinforced its value is 6,5 × 10-5 m / ° C, which makes it suitable for the production of especially critical external designs.They successfully work in conditions with significant temperature differences.
Monolithic polycarbonate is a polymer that can effectively resist the destructive environmental factors.The material is inert with respect to many corrosive media, and this it is dependent on the temperature and concentration of substances.
panels feature high chemical resistance with respect to the following compounds:
- organic and inorganic acids and their salts solutions.
- Reducing and oxidizing agents of different kinds.
- alcohols and detergents.
- organic oils and lubricants.
However, some chemical compounds capable of reacting with the polymer, which leads to the gradual destruction of the panels.
For the convenience of the reader information about the resistance of polycarbonate to certain liquids are presented in tabular form:
|Table salt||+||hydrogen peroxide concentration of 30%||+|
|Butyl alcohol||+||Gasoline, diesel fuel and mineral oils||+|
|Ethanol||+||Ammonia|| - |
|Hydrochloric acid, 20%||+||Butyl||-|
|Potassium permanganate, max.conc.10%||+||Alkaline solutions||-|
|"+" sign in the table means the material resistance to prolonged exposure to these substances.|
mechanical strength of polycarbonate ISO 527
panels are characterized by their ability to resist a variety of loads for a significant period of time.Certification polycarbonate in terms of mechanical strength is manufactured in accordance with the requirements of Russian, American and international standards.
The advantages of this material should be mentioned are:
- Tensile strength in bending of the polymer is tested in accordance with ISO 178 and amounts to 95 MPa depending on the grade.
- Modulus This test is in the range 2600 MPa.
- sheet Tensile strength at break when testing according to ISO 527- to 60 MPa.
- modulus similar loads - to 2200 MPa with an elongation of the sample in some cases up to 100%.
- viscosity of the solid polycarbonate during Charly tested according to the procedure for products with a certain depth of the notch is not more than 30 - 40 kJ / m².
- similar figure Izod in the range of 600 to 800 J / m.
sheet polycarbonate is highly resistant to impact.For example, in tests without material cut it remained intact at the maximum load achievable in a laboratory.Especially strong panels are used for the production of protective articles and means to ensure the security of citizens and law enforcement officers.
Polycarbonate monolithic unlike glass is able to flex under normal environmental conditions.This property of the material is widely used in the manufacture of various kinds of curved structures: sheds, fences and the like.This quality is characterized by a bend radius limit, which depends on the sheet thickness.
Detailed information on this subject is presented in the chart:
dependence of the maximum possible bending radius of the thickness of a sheet of solid polycarbonate.
sheet thickness and specific gravity
Industries offers an extensive range of transparent and opaque panels of various colors.Monolithic polycarbonate characteristics that are unique in many respects, has a density of 1200 kg / m3.This is significantly lower than that of window glass that has more than twice the specific gravity.This fact allows you to largely alleviate many constructions while maintaining their mechanical strength at the appropriate level.
Knowledge of such an index, the weight of one square meter of solid polycarbonate is necessary to determine the weight of roofing material during settlement and design work.
Weights 1 m2 of solid polycarbonate will depend on the thickness of the sheet material:
dependence of the weight of 1 m2 of solid polycarbonate sheet thickness
monolithic panels of polycarbonate are selective light transmission.To achieve this effect on the surface of the sheet is applied by extrusion sheeting.The thickness of this layer is sufficient to delay the absorption and emission of the ultraviolet part of the spectrum, with visible and infrared light soft easily penetrates through the barrier.Depending on the type plate protective coating is applied to one or both sides.
used extrusion technology eliminates the possibility of delamination from the substrate due to its interpenetration materials.Another technology panel protection against radiation UF is the use of special additives within the scope of plastic stabilizers.This method of protection of the polymer is more expensive, but its efficacy is much higher.
To protect polycarbonate monolith from damage during storage and transportation, he glued plastic wrap.She indicated brand panel and the side on which the protective coating.The film is taken directly during the installation or after it, otherwise it will be difficult to remove from the panel surface.
Polycarbonate exposed to an open flame, and above a certain temperature begins to melt and is its fire.Upon termination of the external impact of this process spontaneously decays.Panels of a polymeric material have the following features in terms of fire safety:
- resistance to high temperatures and open flames;
- during combustion of smoke minimal;
- combustion products do not differ toxicity;
- measure oxygen index of the material is 28-30%.
monolithic Polycarbonate is classified as self-extinguishing materials.This allows it to be classified as V-1 (B1) on fire safety in accordance with the standards of UL-94 and DIN 4102. In the process of producing the material does not use any fire retardants and other additives.
panels are made of solid polycarbonate pellets by extrusion or injection molding.
life of this material is determined by the following factors:
- quality of raw materials and compliance with technical conditions of production;
- correct installation;
- climatic conditions and exposure to adverse environmental factors.
Different manufacturers declare their use of the material as possible, with a minimum figure is more than 10 years.Studies carried out in specialized laboratories have shown long-term exposure (over 2000 hours), causes a decrease in permeability of the panel less than 10%.This corresponds to approximately 20 years of use of polycarbonate in the desert regions of Arizona and Israel.
As mentioned above, the solid polycarbonate is produced from raw granulate using special equipment with a closed production cycle.The method of manufacturing the panels to minimize negative impacts on the environment.By itself, the material differs chemically inert and does not emit any hazardous substances for humans and animals.
Monolithic polycarbonate ecological characteristics is recommended for use in residential areas.Special brand of panels are made specifically for use in medicine and the pharmaceutical industry.Allows the use of this material in the building to perform external and internal finishes.
Industry produces several types of polycarbonate with different indices of permeability to sunlight and artificial light.By transmittance transparent panels have the following figures from 86 to 89%.Thus the introduction of special additives in the material can change the optical properties of the material and to maximize the absorption of ultraviolet rays of the spectrum.
Other optical performance polycarbonate characterize the degree of its transparency.Thus, yellowness index of the colorless specimens is not more than one unit, and the turbidity is not more than 0.5%.Panels of this polymer does not concede to silica glass, and along with other benefits, they retain their characteristics throughout the entire service life.
Monolithic polycarbonate is not classified materials designed to reduce energy loss through the building envelope constructions.However, the panels have a lower thermal conductivity than conventional window glass.For polycarbonate, said characteristic has a value of 0.2 W / mK, the measurements were made according to the procedure approved by the standard DIN 52612. The window glass also has a greater thermal conductivity.
It should be borne in mind that the insulating properties of the material increases with its thickness.Thus, ceteris paribus solid polycarbonate sheet of 8 mm by 20% more efficient than a similar glass.Another big difference is observed when installing two or more panels with an air gap between them.In recent years, the polymer is increasingly being used in double glazing instead of traditional glass.
balcony glazing monolithic polycarbonate.
Polycarbonate is viscous monolithic internal structure of the plate and by virtue of this feature can effectively absorb sound.From the measurements, the sound insulation for plates with a thickness of 4 mm to 12 ranges from a minimum value of 18 dB and a maximum of 23 dB.It was not clear moments?