Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China National Textile and Apparel Council.
This standard is under the jurisdiction of the National Technical Committee 209 on Textiles of the Standardization Administration of China (SAC/TC 209).
Meltblown nonwoven fabric
1 Scope
This standard specifies the technical requirements, test method, inspection rules, marking, packaging, transportation and storage of meltblown nonwoven fabric.
This standard is applicable to nonwoven fabric solidified by one or more technologies from fiber web manufactured by meltblown method.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in color
GB/T 4666 Textiles - Fabrics- Determination of width and length
GB/T 5455 Textiles - Burning behaviour - Determination of damaged length, afterglow time and afterflame time of vertically oriented specimens
GB/T 11048 Textiles - Physiological effects - Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test)
GB/T 14295 Air filter
GB/T 24218.1 Textiles - Test methods for nonwovens - Part 1: Determination of mass per unit area
GB/T 24218.2 Textiles - Test methods for nonwovens - Part 2: Determination of thickness
GB/T 24218.3 Textiles - Test methods for nonwovens - Part 3: Determination of tensile strength and elongation (strip method)
GB/T 24218.15 Textiles - Test methods for nonwovens - Part 15: Determination of air permeability
GB/T 26125 Electrical and electronic products - Determination of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers)
GB/T 32610-2016 Technical specification of daily protective mask
FZ/T 01130 Nonwoven - Testing and evaluation for oil absorptive properties
3 Technical requirements
3.1 Inherent quality
3.1.1 Technical requirements of basic items
Inherent quality items are classified into basic items and optional items, and the technical requirements of basic items shall meet those specified in Table 1.
Table 1 Technical requirements of basic items
Item Specification /(g/m2)
10 15 20 30 40 50 60 70 80 90 100 110 120 150
Width deviation /mm -1~+3
Mass deviation rate per unit area /% ±8 ±7 ±5 ±4
Coefficient of mass variation per unit area /% ≤7 ≤6
Tensile strength /N Transverse ≥2 ≥6 ≥10
Longitudinal ≥4 ≥9 ≥15
Transverse and longitudinal elongation /% ≥20
Notes:
1 Specification is expressed by mass per unit area. When the marked specification is between the adjacent two specifications in the table, the appropriate assessment indicator of tensile strength are calculated by interpolation method. Products out of the specification range shall be implemented according to the contract.
2 Calculation equation of interpolation method: , where X is mass per unit area and Y is tensile strength.
3.1.2 Technical requirements of optional items
The optional items for air filtration materials include thickness, filtration efficiency, air permeability, flame retardance and restricted (prohibited) substance; the optional items for thermal insulation materials include thermal resistance and air permeability; the optional items for oil absorption materials include oil absorption time and oil absorption amount. The standard values of optional items are stipulated by the supply and demand contract.
3.2 Appearance quality
The appearance quality shall meet those specified in Table 2.
Table 2 Appearance quality requirements
Item Requirements
Color difference of the same batch /Grade 4~5
Broken hole Not permissible
Pinhole Invisible ≤10 pcs /100cm2
Visible Not permissible
Crystal point Area<1mm2 ≤10 pcs /100cm2
Area≥1mm2 Not permissible
Flying a Not permissible
Foreign matters Not permissible
a Only the meltblown nonwoven fabric used for civil masks are assessed.
Notes:
1 Crystal point refers to the point-like polymer particles on the cloth surface.
2 Flying refer to the fiber blocks or fiber strips formed by solidified flying flocs/flying cottons on the cloth surface with a convex feeling.
4 Test method
4.1 Width deviation
Test method shall comply with GB/T 4666.
4.2 Mass deviation rate per unit area and coefficient of mass variation per unit area
Test method shall comply with GB/T 24218.1.
4.3 Tensile strength and elongation
Test method shall comply with GB/T 24218.3.
4.4 Thickness
Test method shall comply with GB/T 24218.2.
4.5 Filtration efficiency
The filtration efficiency of meltblown nonwoven fabric used in industrial field shall be determined according to GB/T 14295, and that used in the civil mask field shall be determined according to GB/T 32610-2016, Annex A.
Foreword i
1 Scope
2 Normative references
3 Technical requirements
4 Test method
5 Inspection rules
6 Marking, packaging, transportation and storage
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China National Textile and Apparel Council.
This standard is under the jurisdiction of the National Technical Committee 209 on Textiles of the Standardization Administration of China (SAC/TC 209).
Meltblown nonwoven fabric
1 Scope
This standard specifies the technical requirements, test method, inspection rules, marking, packaging, transportation and storage of meltblown nonwoven fabric.
This standard is applicable to nonwoven fabric solidified by one or more technologies from fiber web manufactured by meltblown method.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in color
GB/T 4666 Textiles - Fabrics- Determination of width and length
GB/T 5455 Textiles - Burning behaviour - Determination of damaged length, afterglow time and afterflame time of vertically oriented specimens
GB/T 11048 Textiles - Physiological effects - Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test)
GB/T 14295 Air filter
GB/T 24218.1 Textiles - Test methods for nonwovens - Part 1: Determination of mass per unit area
GB/T 24218.2 Textiles - Test methods for nonwovens - Part 2: Determination of thickness
GB/T 24218.3 Textiles - Test methods for nonwovens - Part 3: Determination of tensile strength and elongation (strip method)
GB/T 24218.15 Textiles - Test methods for nonwovens - Part 15: Determination of air permeability
GB/T 26125 Electrical and electronic products - Determination of six regulated substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers)
GB/T 32610-2016 Technical specification of daily protective mask
FZ/T 01130 Nonwoven - Testing and evaluation for oil absorptive properties
3 Technical requirements
3.1 Inherent quality
3.1.1 Technical requirements of basic items
Inherent quality items are classified into basic items and optional items, and the technical requirements of basic items shall meet those specified in Table 1.
Table 1 Technical requirements of basic items
Item Specification /(g/m2)
10 15 20 30 40 50 60 70 80 90 100 110 120 150
Width deviation /mm -1~+3
Mass deviation rate per unit area /% ±8 ±7 ±5 ±4
Coefficient of mass variation per unit area /% ≤7 ≤6
Tensile strength /N Transverse ≥2 ≥6 ≥10
Longitudinal ≥4 ≥9 ≥15
Transverse and longitudinal elongation /% ≥20
Notes:
1 Specification is expressed by mass per unit area. When the marked specification is between the adjacent two specifications in the table, the appropriate assessment indicator of tensile strength are calculated by interpolation method. Products out of the specification range shall be implemented according to the contract.
2 Calculation equation of interpolation method: , where X is mass per unit area and Y is tensile strength.
3.1.2 Technical requirements of optional items
The optional items for air filtration materials include thickness, filtration efficiency, air permeability, flame retardance and restricted (prohibited) substance; the optional items for thermal insulation materials include thermal resistance and air permeability; the optional items for oil absorption materials include oil absorption time and oil absorption amount. The standard values of optional items are stipulated by the supply and demand contract.
3.2 Appearance quality
The appearance quality shall meet those specified in Table 2.
Table 2 Appearance quality requirements
Item Requirements
Color difference of the same batch /Grade 4~5
Broken hole Not permissible
Pinhole Invisible ≤10 pcs /100cm2
Visible Not permissible
Crystal point Area<1mm2 ≤10 pcs /100cm2
Area≥1mm2 Not permissible
Flying a Not permissible
Foreign matters Not permissible
a Only the meltblown nonwoven fabric used for civil masks are assessed.
Notes:
1 Crystal point refers to the point-like polymer particles on the cloth surface.
2 Flying refer to the fiber blocks or fiber strips formed by solidified flying flocs/flying cottons on the cloth surface with a convex feeling.
4 Test method
4.1 Width deviation
Test method shall comply with GB/T 4666.
4.2 Mass deviation rate per unit area and coefficient of mass variation per unit area
Test method shall comply with GB/T 24218.1.
4.3 Tensile strength and elongation
Test method shall comply with GB/T 24218.3.
4.4 Thickness
Test method shall comply with GB/T 24218.2.
4.5 Filtration efficiency
The filtration efficiency of meltblown nonwoven fabric used in industrial field shall be determined according to GB/T 14295, and that used in the civil mask field shall be determined according to GB/T 32610-2016, Annex A.
Contents of FZ/T 64078-2019
Foreword i
1 Scope
2 Normative references
3 Technical requirements
4 Test method
5 Inspection rules
6 Marking, packaging, transportation and storage
