Poly spunbond/meltblown/spunbond composite nonwoven (industry trial standard)
1 range
This standard specifies the product classification, technical requirements, test methods, acceptance rules, packaging and marking requirements, transportation and storage of polypropylene spunbond/meltblown/spunbond composite nonwovens (hereinafter referred to as SMS).
This standard applies to 10g/m 2 —>80g/m 2 polypropylene SMS products based on polypropylene.
2 normative references
The terms in the following documents become the terms of this standard by reference to this standard. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents are available. . For undated references, the latest edition applies to this standard.
GB/T 4744 textile fabric water resistance test, hydrostatic test
GB/T 5453 textiles, fabric permeability determination
Standard atmosphere for humidity control and test of GB/T 6529 textiles
Determination of the mass per unit area of ​​FZ/T 60003 nonwoven fabric
FZ/T 64004 thin bonding non-woven fabric
Determination of breaking strength and elongation at break of FZ/T 60005 nonwoven fabric
3 noun terms
 The following terms established in GB/T3291.3 apply to this standard.
3.1 Hard block
Refers to the hard block caused by melt dripping.
3.2 stiffening
Refers to the unstretched hard thread.
3.3 Turning the net
It refers to the phenomenon that the product is seriously uneven due to the foreign matter being hung before the product is reinforced.
3.4 folding
It refers to the superposition of fiber webs together, after consolidation, different superpositions with other places.
3.5 Holes
Holes with an area of ​​4 mm 2 or more, and no fibers in the middle are holes.
4 technical requirements
4.1 Polypropylene chips (required for raw materials)
4.2 Physical properties
The physical properties of the product shall comply with the requirements of Table 1.
Quality 0 291.3 Table 1 Physical performance requirements
Quality per unit area | g/m 2 | 11-13 | >13-17 | >17-21 | >21-25 | >25-30 | >30-35 | >35-40 | >40-50 | >50-60 | >60-70 | >70-80 | >80 |
Unit area quality deviation rate: | % | ≤±6%, | ≤±4%, | ||||||||||
Single value deviation per unit area | % | ≤±12% | |||||||||||
Longitudinal breaking strength | N/5cm | >18 | >23 | ||||||||||
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