SMS non-woven fabric What is SMS non-woven SMS (English: Spunbond + Meltblown + Spunbond Nonwovens)
Gram weight range: 30-500 g / m2;
Basic width: 1500mm and 2400mm;
Belongs to composite non-woven fabric, it is a composite product of spunbond and meltblown
[Edit this paragraph] The performance is non-toxic and tasteless, highly efficient bacteria isolation. Through special equipment treatment, it can achieve antistatic, anti-alcohol, anti-plasma, water-repellent and water-producing properties.
use:
[Edit this paragraph] Uses 1, medical and health labor protection products such as surgical gowns, surgical caps, protective clothing, hand washing clothes, handbags, etc. 2, sanitation products such as filter non-woven fabrics, oil-absorbing cloths, rags 3, thermal insulation materials and clothing accessories 4. Anti-feather non-woven fabric for anti-down and down
[Edit this paragraph] SMS Industry Standard 1 Scope This standard specifies the product classification, technical requirements, test methods, acceptance rules, packaging and marking requirements for polypropylene spunbond / meltblown / spunbond nonwoven fabrics (hereinafter referred to as SMS) , Transportation and storage.
This standard applies to 10g / m2—> 80g / m2 polypropylene SMS products with polypropylene as the main raw material. 2 Normative reference documents The clauses in the following documents become the clauses of this standard through the reference of this standard. For the cited documents with annotated date, all subsequent amendments (not including errata content) or revisions are not applicable to this standard. However, all parties to agreements based on this standard are encouraged to study whether the latest of these documents can be used version. For the cited documents without date, the latest version applies to this standard.
GB / T 4744 Determination of water permeability of textile fabrics, hydrostatic pressure test GB / T 5453 Textiles, determination of fabric permeability GB / T 6529 Standard atmosphere for humidity control and testing of textiles FZ / T 60003 Determination of mass per unit area of ​​non-woven fabrics FZ / T 64004 Thin-bonded non-woven fabric FZ / T 60005 Non-woven fabrics Determination of breaking strength and breaking elongation 3 Noun term GB / T3291.3 established and the following terms apply to this standard 3.1 Hard block refers to melt droplets Lumps caused by falling.
3.2 Stiff wire refers to a hard wire without drawing.
3.3 Turning the net refers to the phenomenon that the fiber web is seriously uneven due to being hung by foreign objects before being reinforced.
3.4 Folding means that the fiber webs are superimposed together, and after reinforcement, they overlap with Other places.
3.5 Holes with a hole area of ​​4mm2 or more, and those without fibers in the middle are holes.
4 Technical requirements 4.1 Polypropylene chips (with or without raw material requirements)
4.2 Physical properties The physical properties of the product should meet the requirements of Table 1. Table 1 Physical properties require 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 value deviation per unit area% ≤ ± 12%
Longitudinal breaking strength N / 5cm> 18> 23> 28> 35> 40> 50> 54> 67> 81> 90> 100> 108
Longitudinal breaking elongation%> 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 a spunbond layer that is laid horizontally, the breaking strength and elongation indicators are implemented according to the contract or agreement between the supplier and the buyer.
4.3 Appearance quality 4.3.1 The cloth surface is uniform, flat, without obvious creases, broken edges and holes, oil stains, and the package is neat.
4.3.2 The width is in accordance with the contract and agreement. The width deviation is specified in Table 2.
Table 2
Width (mm) Width deviation (mm)
≤800 ± 3
＞ 800 ï¼2ï¼ ï¼‹ 5
4.3.3 Pollution: The product should be dry and clean, free of oil, insects, dust and metal powder.
4.3.4 Hard blocks / stiff wires: not more than 10 at 1000 meters, each area not exceeding 4cm2, and continuous hard blocks / stiff wires are not allowed.
4.3.5 Micropores: refers to the holes on the surface of the product that are similar to the size of a pinhole. For products used for hygiene and medical purposes, micropores are not allowed.
4.3.6 Odour: Abnormal smell is not allowed.
4.3.7 Holes / tearing / cutting: No holes / tearing / cutting are allowed 4.3.8 Net turning / folding: no more than 10 per kilometer less than 5cm wide; more than 5cm wide, No more than 1 per kilometer.
4.3.9 Wrinkle: Continuous dead wrinkles are not allowed.
4.4.10 Unreinforced area: No more than 5 connected pressure points are allowed to be defective.
4.4.11 Appearance of cloth roll: It should be clean and tidy, without rotten edges and visible defects.
4.4.12 Joints: For diapers / sheets and women's sanitary napkins, the number of joints per cloth roll is not allowed to exceed 1 per 1000 meters.
5 Test methods 5.1 Inspection of appearance Under sufficient light, use normal sensory inspection and measure with a ruler or steel ruler with an accuracy of 1 mm.
5.2. Inspection of physical properties 5.2.1 The determination of mass per unit area is in accordance with FZ / T 60003-1991.
5.2.2 The determination of breaking strength and elongation is in accordance with FZ / T 60005-1991.
5.2.3 The determination of resistance to hydrostatic pressure shall be in accordance with GB / T 4744-1997.
5.2.4 Determination of air permeability According to the provisions of GB / T 5453-1997, a 20cm2 test head is selected, a pressure difference of 100Pa is set, and a unit of measurement of l / m2 / s is selected.
5.2.5 Choose one of the following methods to determine the width according to the contract or agreement.
5.2.5.1 The width of the roll measured with a steel tape measure is the width of the roll change, accurate to 1mm,
5.2.5.2 Unwinding makes the fabric slack. At least 5m away from the winding head, the width is measured at least 5 places with a rigid tape measure, accurate to 1mm. Calculate the average value (retain integer digits) as the width of rewinding.
6. Inspection rules 6.1 The quality, strength, elongation, hydrostatic pressure, air permeability and width of the square meters in the technical requirements of the inspection items are the factory inspection items. The product should be qualified by the inspection department of the manufacturer and attached with the product qualification The certificate can leave the factory.
6.2 It is stipulated in batches that each batch of products must be composed of continuously produced products with the same raw material ratio, process conditions and specifications.
6.3 Sampling requirements Each batch of products is in accordance with 7.3 of FZ / T64004-93.The samples for physical properties are drawn 3m long and cut away from the roll head more than 1m and the direction is marked.
6.4 The evaluation of the test results is determined by the lowest item in the technical requirements as the grade of the batch of products. The physical and mechanical properties are judged by the batch and the appearance quality is judged by the volume. If the physical and mechanical performance test results do not meet the requirements, they can be doubled. Sampling samples, re-test the project, based on the final results of the re-test as the basis for judgment.
6.5 Acceptance rules 6.5.1 According to the quality inspection by the manufacturer, within one month of delivery, the consignee should conduct acceptance. If it is not accepted, the goods shall be received according to the inspection results of the consignor.
6.5.2 At the time of acceptance, the physical and mechanical performance test randomly selects samples from the batch of products according to 10% of the delivery volume, not less than 2 rolls. Each roll is tested in accordance with the provisions of Chapter 6, and the average value of the test of each roll is Final result: Appearance inspection is re-inspected from the batch of products at 20% of the delivery volume, not less than 5 rolls, under 400-600LX illumination, roll-to-roll rewind inspection, if the non-conformity rate exceeds 8%, then The batch of products is correspondingly lowered by one grade.
6.5.3 If there is any objection to the product quality, the arbitration inspection agency may be referred to the re-inspection, and the re-inspection result shall be the final result, and the re-inspection fee shall be borne by the responsible party.
7 Packaging, marking, transportation and storage 7.1 Packaging and packaging materials are made of plastic film or shrink film.
7.2 Labels Labels should be filled clearly and neatly. The content should include: manufacturer name, product name, executive standard number, standard record number, production batch number, product specifications (square meter weight, width, roll length and color, etc.), theory Volume weight, volume number, quality grade mark; label color can be determined according to need.
7.3 Transport should be protected from light, water, moisture, pollution, breakage, and extrusion, and it is strictly forbidden to drop the cloth roll from a high place.
7.4 Storage and storage should be placed in a ventilated, dry, dark and clean warehouse.
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