What is SMS Nonwoven Fabric?

HUATAO LOVER NONWOVEN FABRIC CO.,LTD

SMS Nonwovens What is SMS Nonwoven SMS (English: Spunbond + Meltblown + Spunbond Nonwovens)
Weight range: 30-500 g/m2;
Basic width: 1500mm and 2400mm;
It belongs to composite nonwovens, it is a spunbond and meltblown composite product
performance non-toxic and odorless, efficient isolation of bacteria. Through special treatment of equipment, it can achieve antistatic, anti-alcoholic, anti-plasma, water repellent and water-producing properties.
use:
Uses 1, medical and health protection products such as surgical clothing, surgical caps, protective clothing, hand-washing clothing, handbags, etc. 2, sanitation products such as filter non-woven fabrics, oil-absorbing cloth, rags 3, insulation materials and clothing accessories 4, anti-feather anti-feather non-woven fabric
SMS industry standards 1 Scope This standard specifies the polypropylene spunbond / meltblown / spunbond composite nonwoven (hereinafter referred to as SMS) product classification, technical requirements, test methods, acceptance rules, packaging and marking requirements , transportation and storage.
This standard applies to 10g/m2 -> 80g/m2 polypropylene SMS products based on polypropylene as the main raw material. 2 Normative references The clauses in the following documents have become the standard clauses through the reference of this standard. For the referenced documents during the period of annotation, all subsequent amendments (not including errata content) or revisions do not apply to this standard. However, the parties that have reached an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. version. The latest version of any referenced document that does not cover the period is applicable to this standard.
GB/T 4744 Determination of water impermeability for textile fabrics, hydrostatic test GB/T 5453 textiles, determination of fabrics' breathability GB/T 6529 for the conditioning of textiles and standard test atmosphere FZ/T 60003 Determination of mass per unit area of nonwoven fabrics FZ/T 64004 Thin bonding non-woven fabrics FZ/T 60005 Non-woven fabrics Determination of breaking strength and elongation at break 3 Terms Glossary GB/T3291.3 established and the following terms apply to this standard 3.1 Lump refers to melt drop Falling hard blocks.
3.2 Stiffness refers to unstretched hard filaments.
3.3 Turnover means that the product has been severely inhomogeneous due to being hung by foreign objects before being reinforced.
3.4 Folding refers to the superimposition of fiber webs, which, after reinforcement, are different from other places.
3.5 Holes with a hole area of 4mm2 or more, with no holes in the middle.
4 Technical requirements 4.1 Polypropylene chips (whether raw materials are required)
4.2 Physical properties The physical properties of the product are to comply with the requirements of Table 1. Table 1 Physical performance requirements Mass per unit area g/m2 11-13 >13-17 >17-21 >21-25 >25-30 >30-35 >35- 40 >40-50 >50-60 >60-70 >70-80 >80
Mass deviation rate per unit area: % ≤±6%, ≤±4%
Single-unit deviation per unit area % ≤±12%
Longitudinal breaking strength N/5cm >18 >23 >28 >35 >40 >50 >54 >67 >81 >90 >100 >108
Longitudinal elongation at break % >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30
Transverse breaking strength N/5cm >9 >11 >14 >18 >22 >28 >32 >38 >45 >55 >60 >65
Transverse elongation at break % >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30 >30
Anti hydrostatic pressure mmH2O >80 >110 >130 >150 >200 >220 >250 >280 >300 >300 >300 >300
Air permeability l/m2/s >1100 >900 >800 >700 >600 >400 >250 >200 >150 >125 >125 >100
Note: For SMS products with horizontally laid webs for the spunbond layer, the breaking strength and elongation specifications are to be fulfilled in accordance with the contract or agreement between supply and demand.
4.3 Appearance quality 4.3.1 The cloth surface is uniform, flat, without obvious creases, broken edges, oil stains and neat packages.
4.3.2 Width According to the contract and agreement. The width deviation is specified in Table 2.
Table 2
Width (mm) Width deviation (mm)
≤800 ±3
>800 -2-+5
4.3.3 Contamination: The product should be dry, clean, free of oil, insects, dust, metal powder, etc.
4.3.4 lump/stiffness: no more than 10 in 1000 meters, no more than 4cm2 in each area, and no continuous block/stiffness is allowed.
4.3.5 Micro-holes: Refers to holes on the surface of the product that resemble the size of a pinhole. For products used for hygiene and medical purposes, micro-holes are not allowed.
4.3.6 Odor: No abnormal odor is allowed.
4.3.7 Holes/Tears/Cutting: No holes/tears/cuts are allowed 4.3.8 Folding/folding: no more than 10 per kilometer less than 5cm wide; greater than 5cm wide, No more than 1 per km.
4.3.9 Wrinkles: Continuous wrinkles are not allowed.
4.4.10 Unreinforced area: It is not allowed to have more than 5 connected pressure point defects.
4.4.11 Appearance of the roll: It should be clean and tidy, with no bad edges and visible spots.
4.4.12 Splices: Diapers/sheets and feminine hygiene napkins. The number of splices per roll must not exceed 1 per 1000 m.
5 Test methods 5.1 Appearance test Under adequate light, use a normal sensory test and measure with a ruler or steel ruler with an accuracy of 1 mm.
5.2. Inspection of physical properties 5.2.1 Determination of mass per unit area According to the provisions of FZ/T 60003-1991.
5.2.2 Determination of breaking strength and elongation according to FZ/T 60005-1991 regulations.
5.2.3 Determination of antistatic hydrostatic pressure According to the provisions of GB/T 4744-1997.
5.2.4 Determination of air permeability According to the provisions of GB/T 5453-1997, select 20cm2 test head, set a pressure difference of 100Pa, use l/m2/s measurement units.
5.2.5 Select one of the following methods according to the contract or agreement to determine the width.
5.2.5.1 Measure the width of the roll with a steel tape measure to the width of the roll, accurate to 1mm,
5.2.5.2 Unwinding The fabric should be loosened, at least 5m away from the head of the roll, and measure at least 5 webs with the tape measure to the nearest 1mm. Calculate the average (reserve the integer number) as the width of the rollover.
6. Inspection Rules 6.1 The quality, strength, elongation, hydrostatic pressure, air permeability, and width of square meters in the project's technical requirements shall be the factory inspection items. The products shall be inspected by the inspection department of the production plant and shall be accompanied by qualified products. The certificate can be shipped from the factory.
6.2 In batches, each batch of product must be composed of the same raw material ratio, process conditions, and specifications for continuous production.
6.3 Sampling requirements Each batch of products shall be in accordance with 7.3 of FZ/T64004-93. The length of the sample taken for physical performance shall be 3m long and shall be cut and calibrated at a distance of more than 1m from the head. Record the sampling period, production team, and product specifications.
6.4 Evaluation of Inspection Results The lowest level of the assessment item in the technical requirements shall be determined as the grade of the batch of products, the physical and mechanical properties shall be determined in batches, the appearance quality shall be determined by volume evaluation, etc. If the physical and mechanical performance test results do not meet the requirements, they may be doubled. Samples are sampled and the retest of the project is carried out to determine the final result of the retest.
6.5 Acceptance rules 6.5.1 The manufacturer shall perform acceptance inspection within 1 month after delivery according to the quality inspection. If not, he shall receive the goods according to the delivery party inspection result.
6.5.2 At the time of acceptance, the physical and mechanical performance test shall randomly sample the samples according to 10% of the delivery quantity in the batch of products, and shall not be less than 2 rolls. Each volume shall be tested in accordance with the provisions of Chapter 6. The average value of each roll test shall be The final result. Appearance inspection shall be retested at 20% of the delivery volume from the batch of products, and shall not be less than 5 rolls. Under the illumination of 400-600LX, the roll-to-roll inspection shall be carried out on a roll-by-roll basis. If the non-compliance rate exceeds 8%, then The batch of products is reduced by one level.
6.5.3 When there is objection to the quality of the product, it may be submitted to the arbitration inspection agency for re-inspection. The result of the re-inspection shall be the final result. The cost of re-inspection shall be borne by the responsible party.
7 Packaging, marking, transport and storage 7.1 Packaging Packaging materials use plastic film or shrink film.
7.2 The label should be filled in clearly and neatly. The contents should include: manufacturer name, product name, implementation standard number, standard preparation number, production batch number, product specification (gram weight, width, length and color, etc.), theory Roll weight, roll number, quality grade mark; label color can be set according to need.
7.3 Transport should be protected from light, water, moisture, pollution, damage, and extrusion. It is forbidden to leave the roll from a height.
7.4 Storage Storage should be stored in a ventilated, dry, dark, clean warehouse.