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TECHNICAL DATA

This page is dedicated to the mechanical, physical, electrical and fire resistance technical data of GRP profiles, as well as the size tolerances related to the ASTM D3917 standard generally applied to thermosetting resin profiles.
The Top Glass internal laboratory is equipped to perform mechanical, fire-resistance and dielectric tests on finish profiles in addition to the acceptance testing of incoming raw materials. We thus ensure compliance to the highest standards in product quality and traceability.
These tests are important because they ensure compliance with product technical requirements and international standards.
Our qualified technicians determine the main mechanical characteristics such as resilience and resistance to traction, flexion, compression, shearing, and fatigue as well as performing all the dimensional examinations.
In addition to mechanical testing, we use other equipment to run electrical tests, such as measurement of the breakdown voltage to derive an estimate of electrical insulation properties, liquid penetration testing and resistance tracing.

Mechanical properties

PROPERTY
TEST METHOD
UNIT
STANDARD
POLYESTER
SELF EXTINGUISHING
POLYESTER
SELF EXTINGUISHING
ACRYLIC
TENSILE STRENGTH LW ASTM D638 MPa 400 400 300
TENSILE MODULUS LW ASTM D638 GPa 26 26 22
TENSILE STRENGTH CW ASTM D638 MPa 30 30 20
TENSILE MODULUS CW ASTM D638 GPa 8 8 7
FLEXURAL STRENGTH LW AST MD790 MPa 400 400 300
FLEXURAL MODULUS LW EN 13706 (su vasta scala) GPa 25 25 21
FLEXURAL STRENGTH CW ASTM D790 MPa 70 70 60
FLEXURAL MODULUS CW ASTM D790 GPa 7 7 6
COMPRESSIVE STRENGTH LW ASTM D695 MPa 220 220 160
COMPRESSIVE MODULUS LW ASTM D695 GPa 18 18 15
COMPRESSIVE STRENGTH CW ASTM D695 MPa 70 70 55
COMPRESSIVE MODULUS CW ASTM D695 GPa 7 7 6
IN PLANE SHEAR STRENGTH LW ASTM D2344 MPa 30 30 20
SHEAR MODULUS LW EN 13706 (full scale) GPa 3 3 2,4
IMPACT STRENGTH (CHARPY) ISO 179 kJ/m2 170 170 140
BEARING STRENGTH LW ASTM D953 MPa 170 170 130
BEARING STRENGTH CW ASTM D953 MPa 70 70 50
POISSON'S RATIO LW ASTM D3039 --- 0,28 0,28 ----
POISSON'S RATIO CW ASTM D3039 --- 0,12 0,12 ----

Physical properties

PROPERTY
TEST METHOD
UNIT
STANDARD
POLYESTER
SELF EXTINGUISHING
POLYESTER
SELF EXTINGUISHING
ACRYLIC
BARCOL HARDNESS ASTM D2583 °B 45 45 50
SPECIFIC WEIGHT ASTM D792 g/cm3 1,8 1,8 2
GLASS CONTENT BY WEIGHT ISO 1172 % 58 58 48
WATER ABSORPTION ISO 62 % 0,4 0,4 0,4
COEFFICIENT OF THERMAL EXPANSION ISO 11359-2 K-1 11X10-6 11X10-6 9x10-6  
THERMAL CONDUCTIVITY EN 12667 EN 12664 W/mK 0,3 0,3 0,35
TOXICITY INDEX CEI 2037 part 2 / ----  <2  <1

Electrical properties

PROPERTY
TEST METHOD
UNIT
STANDARD
POLYESTER
SELF EXTINGUISHING
POLYESTER
SELF EXTINGUISHING
ACRYLIC
DIELECTRIC STRENGTH ASTM D149 kV/mm 5 5 10
DIELECTRIC CONSTANT AT 50 HZ ASTM D150 --- 5 5 5
LOSS FACTOR AT 50 HZ ASTM D7028 --- 0,05 0,05 0,2
SURFACE RESISTIVITY EN 61340 1012 1012 1012
COMPARATIVE TRACKING INDEX EN 60112 V ---- ---- CTI 600

VALUES REFER TO GLASSFIBRE REINFORCED PROFILES (Continuous Filament Mat/Roving)IN MATRIX POLYESTER - ACRYLIC PROFILES WITH THICKNESS OVER 3 mm
CW = crosswise - LW = lengthwise

Tolerance for mechanical properties refers to longitudinal direction: ± 10%
The data provided is accurate. However, Top Glass does not assume any liability as to its use.

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Dimensional tolerances

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SHAPE AND THICKNESS DIMENSIONAL TOLERANCES

A = ± 4% of specified dimension (but not more than 2.39 mm) (see note)

B (wall thickness -open shape) = ± 10% of specified dimension - if the calculated tolerance is less than 0,25 mm the thickness tolerance shall be ± 0,25 mm (see note)

B (flat profiles up to 304.8 till 1981.2 mm) = ± 15% of specified dimension to 3.175 mm thickness - if the calculated tolerance is less than 0,25 mm the thickness tolerance shall be ± 0,25 mm

B (Flat Sheets up to 304.8 till 1981.2 mm) = ± 10% of specified dimension up 3.175 mm thickness but not exceeding ± 1.27 mm max

C (wall thickness - close shape) = ± 20% of specified dimension - if the calculated tolerance is less than 0,25 mm the thickness tolerance shall be ± 0,25 mm (see note)

Note: APPLICABLE TO SHAPES THAT CAN BE INSCRIBED IN A 914.4 mm MAX DIAMETER CIRCLE

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STRAIGHTNESS

Rods and square, hexagonal, and octagonal bars – all dimensions:
D = 2.5 mm/m, measured without taking into account the profile weight
Rectangular bars up to 38.07 mm width and to 2.38 mm thickness, included:
D = 4.17 mm/m, measured without taking into account the profile weight
Rectangular bars up to 38.07 mm width and over 2.38 mm thickness:
D = 3.33 mm/m, measured without taking into account the profile weight
Rectangular bars over 38.07 mm width and all thicknesses:
D = 3.33 mm/m, measured without taking into account the profile weight
Open shapes, all dimensions:
D = 4.17 mm/m, measured without taking into account the profile weight
Closed shapes, all dimensions:
D = 2.5 mm/m,
Flat SheetD = 2.5 mm/m,

Measured when weight of pultrusion minimizes the deviation by contact with flat surface

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TWIST

LENGTHS OVER 6 m ARE NOT CONSIDERED IN THIS STANDARD
BARS and OPEN SHAPES :
All dimensions and thickness: permitted Y = 3.28°/m twist up to 6. m in length
CLOSED SHAPES:
All dimensions and thicknesses : permitted Y = 3.28°/m twist up to 6 m in length, but not more than 7° total
THE MEASUREMENT MUST BE DONE KEEPING ONE SIDE OF THE PROFILE WELL FIXED ON A FLAT SURFACE AND MEASURING THE ANGLE DEVIATION ON THE OPPOSITE SIDE WHEN THE PROFILE WEIGHT MINIMIZES THE TWIST.
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FLATNESS (FLAT SURFACES)

STANDARD BARS, SOLID SHAPES, SEMIHOLLOW SHAPES, AND FLAT SHEET
Width till 25.4 mm
PERMITTED A VERTICAL DEVIATION OF 0.2 mm x W (mm)
Width up to 25.4 mm
PERMITTED A VERTICAL DEVIATION OF 0.008 mm x W (mm) FOR ALL DIMENSIONS IN TERMS OF THICKNESS
IF "W" = 120 mm, THE VERTICAL DEVIATION "D" IS: 0.008 x120 = 0.96 mm
FLAT SHEETS
PERMITTED A VERTICAL DEVIATION OF 0.008 mm x W (mm) 6.35 mm max.

FOR ALL DIMENSIONS IN TERMS THICKNESS

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ANGULARITY

Leg thickness up to 19.02 mm included ± 2° THE STANDARD DOES NOT APPLY TO THICKNESS OVER 19.02 mm

SQUARENESS OF END CUT

Profiles over 50.8 mm in diameter or width: ± 1°
Profiles 50. 8 mm inclusive and under in diameter or width: ± 2°

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