Polymer materials are widely used in the construction of buildings and structures for different purposes.Polycarbonate is a two- or three-layer panel disposed between the longitudinal ribs.The cellular structure provides a high mechanical strength of the sheet with a relatively small specific gravity.To understand and to understand all the technical characteristics of polycarbonate consider its properties and parameters in detail.
- What is polycarbonate
- temperature regimes use polycarbonate
- chemical resistance
- mechanical strength of polycarbonate
- sheet thickness and specific gravity
- resistance polycarbonate UV
- insulation properties of polycarbonate
- fire performance
- resistant to moisture
- Colours panels
- Purpose and scope of the material
- complexity of installation polycarbonate
What is polycarbonate
The cross-section resembles a leaf cell rectangular or triangular shape, hence the name actually comes mat
Industrial production of polycarbonate is carried out with the use of extrusion technology of granular materials.Production is carried out in accordance with the specifications TU-2256-001-54141872-2006.This document is also used as a guide for the certification of the material in our country.
basic parameters and the linear dimensions of the panels should strictly comply with regulations.
structure of polycarbonate with the cross-section can be of two types:
its leaves release with the following structure:
2H - Double layer with cells of rectangular shape.
3X - three-layer structure with a combination of rectangular cells with additional deviated septum.
3H - three-layer sheets with a rectangular structure of cells, producing a thickness of 6, 8, 10 mm.
5W - five-layer sheet with a rectangular structure of cells usually have a thickness of 16 - 20 mm.
5X - five-layer sheet consisting of both the direct and the inclined edges, producing a thickness of 25 mm.
linear dimensions of cellular polycarbonate sheets are shown in the table:
|number of layers (walls)||2H||2H||2H||2H||3X||3H||6H||5X|
|distance between the ribs||mm||6 6||10,5||10,5||25||16||20||20|
|minimum bending radius||m||0,7||0,9||1,2||1,5||2,4||2,4||3,0||Not recommended|
|The proportion of sheet||kg / m2||0,8||1,3||1,5||1,7||2,5||2,8||3,1||3,4|
|length panels||mm|| 6,000 and 12,000 |
(deviation from the nominal size of 1.5 mm for the transparent sheet and 3 mm for color)
allowed the release of panels with other parameters in addition to those specified in the technical specifications agreed with the customer.The thickness of the ribs is determined by the manufacturer, the maximum permissible deviation for the values are set.
temperature regimes use polycarbonate
Polycarbonate has an extremely high resistance to adverse environmental conditions.Operating temperature is directly dependent on the grade of the material, the quality of raw materials and compliance with production technology.For the vast majority of types of panels, this figure ranges from - 40 ° C to + 130 ° C.
Some types of polycarbonate can withstand extremely low temperatures up to - 100 ° C without destroying the structure of the material.When heating or cooling of the material occurs a change in its linear dimensions.The coefficient of linear thermal expansion of the material is 0.0065 mm / m- ° C, determined according to standard DIN 53752. The maximum allowable extension polycarbonate cell should not exceed 3 mm per 1 m, both the length and width of the sheet.As can be seen polycarbonate has a significant thermal expansion, which is why at its installation should be left appropriate clearances.
change in linear dimensions of polycarbonate, depending on the ambient temperature.
panels used for decoration, are exposed to a wide variety of destructive factors.Polycarbonate is highly resistant to most chemical agents and inert compounds.
not recommended sheets in contact with the following materials:
1. mortar and concrete.
2. plasticized PVC.
3. insecticidal aerosols.
4. strong detergents.
5. sealant based on ammonia, alkalis and acetic acid.
6. Halogen and aromatic solvents.
7. methyl alcohol.
Polycarbonate has high chemical resistance to the following compounds:
1. concentrated mineral acids.
2. saline, neutral and acidic reaction.
3. Most of reducing and oxidizing agents.
4. alcohol solution, with the exception of methanol.
When installing the sheets should be used silicone sealants and specially designed sealing elements of EPDM type and analogues.
mechanical strength of polycarbonate panels
through the honeycomb structure capable of withstanding heavy loads.However, the surface of the sheet is exposed to abrasion by prolonged contact with small particles such as sand.Perhaps the formation of scratches on contact with rough materials of sufficient hardness.
The mechanical strength of the polycarbonate is largely dependent on the brand and the structure of the material.
During the test panel showed the following results:
|Deformationrelative when the tensile strength||%||6||80|
|relative deformation upon reaching the yield point||%||100||-|
|Viscosity shock||kJ / mm||65||40|
|deformation of elastic||kJ / mm2||35||-|
|Indicators Brinell hardness||MPa||110||-|
Check polycarbonate in terms of strength is carried out in accordance with ISO 9001: 9002.The manufacturer guarantees the performance for at least five years provided that proper installation and use of sheets of special fasteners.
sheet thickness and specific gravity
production technology enables the manufacture of polycarbonate of different sizes.Currently, industry produces a panel with a thickness of 4, 6, 8, 10, 16, 20 and 25 mm with different internal structure of the panel.Density polycarbonate amounts to 1.2 kg / m 3, determined according to the measurement method stipulated by the standard DIN 53479.
panels for this parameter depends on the thickness of the panel, as well as the number of layers and the step of ribs and their sectional area.
for most common brands of polycarbonate data are shown in the table:
|sheet thickness, mm||4||6||8||10||16||16||16||20||25|
|number of walls||2||2||2||2||3||3||6||6||5|
|Step ribs mm||6||6||10,5||10,5||25||16||20||20||20|
|Specific weight, kg / m-||0,8||1,3||1,5||1,7||2,5||2,8||2,8||3,1||3,4|
resistance polycarbonate UV
Features polycarbonate are able to provide reliable protectionfrom the cruel light in the UV range.To achieve this effect, in the production process on the surface of the sheet coextrusion layer applied to special stabilizing coating.This technology provides a guaranteed minimum lifetime of the material for 10 years.
This protective coating delamination during use does not occur because fusion of the polymer to the substrate.When installing the sheet should carefully examine the labeling and correctly align it.Cover to protect against UV radiation should be paid out.The light transmittance of the panel depends on its color and for unpainted sheet active component is from 83% to 90%.Transparent colored panels passed not more than 65%, the polycarbonate is excellent scatters light passed therethrough.
insulation properties of polycarbonate
Polycarbonate has a very decent insulating properties.Moreover, the heat resistance of the material is achieved not only due to the fact that the air contained inside it, but also because the material has a higher thermal resistance than PMMA or glass of the same thickness.The heat transfer coefficient, which describes the thermal insulation properties of the material depends on the thickness and structure of the sheet.He is in the range of 4.1 W / (m² · K) (4 mm) to 1.4 W / (m² · K) (32 mm).Polycarbonate is the most appropriate material where you need to combine transparency and high thermal insulation.That is why this has become such a popular material in the production of greenhouses.
industrial greenhouses made of polycarbonate.
Polycarbonate is resistant to high temperature stress.This material is classified as B1, which is characterized as a European classification of self-extinguishing and flame-retardant.When burning polycarbonate does not emit gases toxic and dangerous to humans and animals.
Under the influence of heat and open flames is the destruction of the structure and the formation of through-holes.Material is significantly reduced in size and removed from the heat source.The appearance of holes ensures removal of the products of combustion of the fire and excessive heat.
Manufacturers polycarbonate guarantee the preservation of the basic technical characteristics of the material on the service life of 10 years, subject to the rules of installation and maintenance.The outer surface of the sheet has a special coating that protects against ultraviolet radiation.Damage it considerably shortens the life of the panel and leading to its premature failure.
In places where there is a risk of mechanical damage polkarbonata should use sheets with a minimum thickness of 16 mm.When installing the panels is taken into account the need to avoid contact with materials, long-term effects of which contributes to their destruction.
polycarbonate honeycomb structure contributes to a low acoustic permeability material.The panels have a strong insulation of the property, which directly depend on the type of sheet and its internal structure.Multi-layer polycarbonate 16mm thick and provides a fading sound waves in the range 10-21 dB.
resistant to moisture
This sheet does not pass and do not absorb moisture, which makes it indispensable during roofing work.The main difficulty in co-polycarbonate water is its penetration into the panel.Its removal without dismantling the structures practically impossible.
Prolonged exposure to moisture in the cells can cause flowering and its gradual destruction.
In order to prevent such developments in the process of installation should only be used with special bolts sealing elements.Edges veneered polycarbonate strap.The easiest way to clean the cell - blowing with compressed air from a cylinder or compressor.
edge protection against moisture is used: 1. - a special adhesive tape, 2 - a special profile, which hopes top glued tape.
cellular polycarbonate are supplied to the market in a transparent and colored versions.
Manufacturers offer a consumer panel in the following colors:
There is also a fully opaque version of silvery panels.Light transmission polycarbonate depends on its thickness and its internal structure.For the light transmittance of the transparent material is from 86% to 4 mm plate, 82% for the 16 mm material.Colouring material is in the array, which helps preserve the color throughout the product life.
Purpose and scope of the material
Polycarbonate is mainly used in construction for the construction of roofing and walling.It was not clear moments?