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Read the SGS heat dimensional stability report for our Flexible Stone. Tested at 80°C, the X and Y direction shrinkage is only 0.06% and 0.03%, ensuring seamless and crack-free Facade Retrofit installations.
1. Report Overview
This article presents the official SGS test report (Report No. GZIN2511002042CM02-1_EN) evaluating the dimensional stability of our Flexible Stone after exposure to heat. Conducted by SGS-CSTC Standards Technical Services Co., Ltd., the test confirms that our material exhibits negligible shrinkage after being subjected to high temperatures. This outstanding stability is a critical benchmark in Flexible Stone Engineering, ensuring that the material will not warp, crack, or pull apart at the seams when exposed to intense sunlight in Facade Retrofit applications.
2. Data Analysis: The Science of Heat Stability
According to the test results, after being heated at 80°C for 6 hours, the Flexible Stone demonstrated exceptional dimensional stability:
- X Direction (Longitudinal): 0.06% shrinkage
- Y Direction (Transverse): 0.03% shrinkage
Engineering Value for Facade Retrofit:
- Flawless Seamless Installation: In Facade Retrofit, achieving a seamless finish is highly desirable but requires materials with absolute thermal stability. With a shrinkage rate of less than 0.1% (far below the national standard requirement of ≤0.25%), our Flexible Stone guarantees that panel joints will not open up or deform under extreme heat.
- No Warping or Blistering: The client’s requirement confirmed no stickiness, swelling, or deformation on the surface. This ensures the aesthetic integrity of the exterior wall remains intact, even during scorching summers.
3. Test Methodology
The SGS evaluation was conducted strictly under the Chinese national standard GB/T 4085-2015 (Section 6.5) and specific client requirements.
- Test Standard: GB/T 4085-2015 Section 6.5
- Test Condition: The specimen was placed in an 80°C environment for 6 hours, then cooled down at 23°C and 50% RH for 24 hours.
- Test Result: X-Direction: 0.06%; Y-Direction: 0.03%.
- Conclusion: Pass (Meeting the standard requirement of ≤0.25%, with no surface stickiness, swelling, or deformation).
Note: The test report explicitly states that it is intended for internal quality control and R&D. For official bidding or compliance verification, the specific SGS report number (GZIN2511002042CM02-1_EN) should be referenced.
4. FAQ
Q1: What does “Dimensional Stability after Exposure to Heat” actually test?
A: This test measures how much a material shrinks or expands when subjected to high temperatures. In real-world applications, poor dimensional stability leads to panels warping, curling at the edges, or separating at the joints.
Q2: Why is a 0.06% shrinkage rate important for Facade Retrofit?
A: A 0.06% shrinkage rate means that for a 1-meter long panel, the deformation is only 0.6 mm. This ultra-low variation ensures that Flexible Stone panels can be installed with seamless joints (密拼) without the risk of gaps opening up or the material peeling off under prolonged exposure to sunlight.
Q3: Does the 80°C test simulate real-world conditions?
A: Yes. Exterior walls, especially in hot climates or dark-colored facades exposed to direct sunlight, can easily reach surface temperatures of 60°C to 80°C. This test proves our Flexible Stone can withstand the most extreme summer conditions without blistering or deforming.
Q4: Is this test related to the flexibility of the material?
A: Yes. The reason Flexible Stone has such high dimensional stability without cracking is due to its unique inorganic composite structure and flexibility. When the material expands or contracts slightly due to heat, its flexible nature absorbs the stress, preventing the rigid cracks that occur in ceramic tiles or natural stone.