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 2017 version and the European Standard, further more our KAXITE series polyamide thermal insulation strips support OEM for performance.
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 23615.1-2017).
For the constructional plastic profiles, we do the production and experiment in accordance with the standards below:
Authoritative Test |
Dimension Test |
Ash Test | ![]() Mechanical Performance | ![]() -30℃ Weatherability |
Apart from the shapes of polyamide thermal break which can be tested directly, the custoimzed special shapes can't be tested directly, so we take specimen from the polyamide profiles and do the testing.
Specimen Design |
CNC Machining |
Specimens Off | ![]() Testing | ![]() Datas Out |
Actually, the Chinese standard GB/T 23615.1-2017 has more testing items than the European standard. Further more, we can realize extremely high performance values for customers. According to all of these, we can do the experiment items like below:
Performance table of PA66 GF25 Building material -- heat insulation strip
No. | Characteristic | Size of Thermal Break | GB/T 23615.1-2017 | KAXITE Customize |
1 | Density | (1.30±0.05)g/cm3 | 1.25~1.45 | |
2 | DSC melting peak temperature | ≥255℃ | ≥255℃ | |
3 | Stress cracking by shaft nail | No crack at orifice | No crack at orifice | |
4 | Shao hardness HD | 80±5 | 80±10 | |
5 | Low temperature notched impact strength(-30℃±2℃) | ≥50kJ/m2 | ≥50kJ/m2 | |
6 | Room temperature longitudinal tensile eigenvalue(23℃±2℃) | ≥90MPa | ≥100MPa | |
7 | Room temperature longitudinal tensile elongation | ≥3% | ≥3% | |
8 | Room temperature longitudinal tensile modulus of elasticity | ≥4500MPa | ≥5500MPa | |
9 | Transverse tensile eigenvalue in room temperature (23℃±2℃) | I type(Width<20mm) | ≥90MPa | 80~140MPa |
10 | I type(Width≥20mm) | ≥80MPa | ||
11 | special shape | ≥25MPa | ||
12 | Transverse tensile eigenvalue in high temperature(90℃±2℃) | I type(Width<20mm) | ≥55MPa | |
13 | I type(Width≥20mm) | ≥45MPa | ||
14 | special shape | ≥20MPa | ||
15 | Transverse tensile eigenvalue in low temperature(-30℃±2℃) | I type(Width<20mm) | ≥90MPa | |
16 | I type(Width≥20mm) | ≥80MPa | ||
17 | special shape | ≥25MPa | ||
18 | Transverse tensile eigenvalue (Hydrolytic resistance, boiling for 4h or keep in 23℃ water for 1000h) | I type(Width<20mm) | ≥85MPa | |
19 | I type(Width≥20mm) | ≥75MPa | ||
20 | special shape | ≥22MPa | ||
21 | Transverse tensile eigenvalue (Thermal aging properties, 140℃ for 1000h) | I type(Width<20mm) | ≥60MPa | |
22 | I type(Width≥20mm) | ≥55MPa | ||
23 | special shape | ≥20MPa | ||
24 | Typical value of thermal conductivity | Heat flow metering method | 0.30W/(m·K) | 0.30W/(m·K) |
25 | Linear coefficient of expansion | 2.3×10-5K-1~3.5×10-5K-1 | 2.3×10-5K-1~3.5×10-5K-1 | |
26 | Fiberglass Content | - | 0~70% | |
27 | FLAMMABILITY (UL94) | - | V0/5VA |