There is no unified universal mandatory national standard for the tensile strength and elongation of PP spunbond nonwoven fabric. The core indicators vary significantly with weight and application scenarios, and there are clear testing execution standards. The specific benchmarks are as follows:
1、 Core Test Execution Standards
The industry standard for testing is GB/T 24218.3 or GB/T 3923.1-2013, corresponding to international standards ISO 13934-1 and ASTM D5035. The testing requires taking samples from both the longitudinal (MD) and transverse (CD) directions for testing.
2、 Benchmark indicators for conventional products of different weights
1.15g/㎡ conventional spunbond fabric: longitudinal tensile strength of about 30N/5cm, elongation at break of 90% -100%
2.40g/㎡ ordinary spunbond PP fabric: longitudinal tensile strength of about 85N/5cm, transverse strength of about 72N/5cm, elongation at break of about 25%
3.50g/㎡ conventional spunbond fabric: longitudinal tensile strength can reach 124N/5cm
4.150g/㎡ industrial grade geotextile: The national standard requires a longitudinal fracture strength of ≥ 9.0kN/m
3、 Industry requirements for special scenarios
1. Ordinary conventional PP spunbond non-woven fabric: The elongation at break is generally in the range of 90% -100%, and the ductility is excellent
2. Medical protective scenarios: It is necessary to balance tension and high elongation to avoid clothing tearing during wearing and activities
3. Common problems with inferior products: Some manufacturers excessively add filler masterbatch to increase tensile strength, which can lead to extremely low elongation at break, brittle materials, and easy tearing and damage in actual use. When purchasing, both indicators need to be verified at the same time, not just the tensile strength.
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