We have our own laboratory for common testing items, and two cooperated labs for regularly authoritative inspection. All extruded plastic profiles are in line with the Chinese standard and the European Standard, for KAXITE series, the performance is rather higher than the standard value.

Due to the great progress and high performance, we were invited as the earliest member of the Chinese National Standard Committee, after years of development, we became the leader of the Chinese National Standard Committee (for revising of GB/T 23615.1-2009).

For the constructional plastic profiles, we do the production and experiment in accordance with the standards below:

  • GB/T 23615.1-2009 Accessorial material for architectural aluminum alloy profiles -- Part 1: Thermal barrier strip of polyamide
  • EN 14024-2004 Metal profiles with thermal barrier -- Mechanical performance Requirement, proof and tests for assessment
  • YS/T 437-2008 Aluminium profiles moment of inertia calculation methods and computing software requirements
  • JG/T 174-2005 Thermal barrier strips for construction industry
  • GB 5237.6 -2012 Wrought aluminium alloy extruded profiles for architecture -- Part 6: Thermal barrier profiles
  • GB/T 8478-2008 Aluminium windows and doors
  • GB/T 8484-2008 Graduation and test for thermal insulating properties of doors and windows
  • JG 175-2011 Insulating aluminum alloy profiles with thermal barrier for buildings

Authoritative Test

Dimension Test

Ash Test

Mechanical Performance

-30℃ Weatherability
Actually, the Chinese standard GB/T 23615.1-2009 has more testing items than the European standard. According to all of these, we can do the experiment items like below:
No. Testing Item Unit National Standard GB/T23615.1-2009 KAXITE Technical Standard
1 Ash(fiberglass) % 25±2 25~27
2 Appearance Quality
surface of smooth, flat, uniform color, no defects that'll effect the usage surface of smooth, flat, uniform color, no defects that'll effect the usage
3 Density g/cm3 1.30±0.05 1.30~1.35
4 Linear expansion coefficient K-1 (2.3-3.5)*10-5 (2.5-3.5)*10-5
5 Vicat softening temperature ≥230 ≥238
6 Deformation temperature for loading 0.45MPa ≥240 ≥250
7 Stress via nail shaft
No cracks around the orifice No cracks around the orifice
8 Shore hardness D 80±5 80~85
9 Unnothed impact strength KJ/m² ≥35 ≥50
10 Longitudinal tensile eigenvalues in room temperature Mpa ≥80 ≥80
11 Elastic modulus Mpa ≥4500 ≥4700
12 Elongation at break % ≥2.5 ≥2.8
13 Transverse tensile eigenvalues in room temperature Mpa ≥70a 80a
14 Transverse tensile eigenvalues in high temperature 90℃ Mpa ≥45a 52a
15 Transverse tensile eigenvalues in low temperature -30℃ Mpa ≥80a 90a
16 Water resistance Test (Transverse tensile eigenvalues) Mpa ≥35a 45a
17 Heat aging test (Transverse tensile eigenvalues) Mpa ≥50a 70a