What Tests Should You Perform on Spunlace Nonwoven Fabric?

Choosing spunlace nonwoven fabric based only on price, GSM, or appearance can lead to costly problems during production. A fabric roll may look uniform but still have insufficient tensile strength, inconsistent absorbency, excessive linting, or dimensional variations that affect converting efficiency.

For manufacturers of wet wipes, cosmetic wipes, disposable towels, household cleaning products, and industrial wiping materials, systematic testing is an important part of supplier qualification and incoming quality control.

However, not every application requires the same tests. A fabric designed for facial wipes may need careful evaluation of softness, linting, and absorbency, while an industrial wiping material may require greater emphasis on tensile strength, durability, and resistance to tearing.

This guide explains the most important spunlace nonwoven fabric testing procedures, what each test measures, how buyers can interpret the results, and how to choose the right testing methods for their applications.

1. Why Is Spunlace Nonwoven Fabric Testing Important?

Spunlace nonwoven fabric is manufactured by entangling fibers with high-pressure water jets. Common fiber options include viscose, polyester, cotton, lyocell, and various blends.

The final performance depends on fiber characteristics, fiber blending, web formation, hydroentanglement, finishing, drying, and winding. Even when two fabrics have the same nominal basis weight, their strength, softness, absorbency, and surface characteristics may differ.

A structured spunlace quality testing process helps buyers determine whether the fabric meets the requirements of the finished product.

The main objectives are to:

• Verify that the fabric meets the agreed technical specification.

• Identify variation between samples, rolls, or production batches.

• Reduce waste during cutting, folding, rewinding, and converting.

• Confirm that important performance characteristics are suitable for the intended application.

• Establish objective criteria for comparing suppliers.

• Create a documented basis for accepting or rejecting a shipment.

A useful testing program should distinguish between three types of evaluation.

The right testing plan depends on the buyer's application, risk level, specification, and budget. More tests do not automatically mean better quality control. The important point is to test the properties that affect the finished product.

2. Spunlace Nonwoven Fabric Testing Methods at a Glance

Before arranging laboratory tests, buyers should identify the characteristics that matter most.

The following sections explain how these tests work and how buyers should interpret the results.

3. Test 1: Basis Weight or GSM Testing

Basis weight, commonly expressed in grams per square meter (GSM), is one of the most fundamental spunlace fabric testing methods.

GSM indicates the mass of fabric covering one square meter. It influences material consumption, cost, coverage, and, together with other construction characteristics, can affect strength, thickness, and absorbency.

For a converter purchasing fabric by weight but manufacturing products by piece, even a small basis-weight difference can change the number of finished products obtained from a roll.

How to test GSM

The basic procedure is:

1. Take a representative fabric specimen using an accurate cutting method.

2. Measure the specimen area.

3. Weigh the specimen using a suitable calibrated balance.

4. Calculate its mass per unit area.

5. Repeat the measurement at the locations specified in the inspection plan.

6. Compare the results with the agreed specification.

The basic formula is:

GSM = Specimen weight (g) ÷ Specimen area (m²)

For example, a specimen measuring 10 cm × 10 cm has an area of 0.01 m². If the specimen weighs 0.50 g, the calculated basis weight is:

0.50 ÷ 0.01 = 50 GSM.

This is an illustrative calculation, not an actual test result for any supplier.

What equipment is required?

Typical equipment includes:

• A suitable specimen cutter or accurate area-measuring method.

• A calibrated balance with appropriate resolution.

• A flat working surface.

• A record sheet or electronic data collection system.

Where required, specimens should be conditioned according to the selected test method before weighing. Moisture can influence measured mass, particularly for hygroscopic fibers, so conditioning conditions should be consistent.

How should buyers interpret GSM results?

Do not rely only on the average. A roll may have an acceptable average while showing excessive variation across its width.

For example, consider a nominal 50 GSM fabric:

These are hypothetical results. Whether they are acceptable depends on the buyer's agreed tolerance and test method.

For reliable inspection, record individual measurements and review both average basis weight and variation between locations.

4. Test 2: Tensile Strength Testing

Tensile strength testing measures the force required to break a fabric specimen when it is pulled under controlled conditions.

It is especially important for spunlace materials that pass through high-speed converting equipment or must withstand pulling, folding, dispensing, or handling.

A fabric that meets the GSM requirement may still tear too easily if its fiber structure or entanglement is unsuitable for the intended application.

Machine direction and cross direction

Spunlace fabric should generally be evaluated in two directions when tensile performance matters.

• Machine direction (MD): The direction in which the fabric moves during production.

• Cross direction (CD): The direction across the width of the fabric.

The results can differ because fabric structure and fiber orientation may not be identical in both directions.

How to perform a tensile test

A typical procedure includes:

1. Prepare specimens with the dimensions required by the selected test method.

2. Condition specimens as required by the method.

3. Mount the specimen in a tensile testing machine.

4. Apply force at the specified rate.

5. Record the maximum force before rupture.

6. Repeat using the required number of specimens.

7. Report the results separately for MD and CD.

Commonly used standards for nonwoven tensile testing include the relevant parts of the ISO 9073 series. Other methods may be appropriate depending on the buyer's requirements. The exact method should be stated in the specification because specimen dimensions and test conditions affect the results.

What should buyers check?

• Tensile strength in MD.

• Tensile strength in CD.

• Variation between specimens.

• Break behavior and unusual results.

• Elongation, if important to converting performance.

• Wet tensile strength, where required for wet-use products.

A result reported only as “30 N tensile strength” is incomplete without the test direction, specimen dimensions, method, and acceptance requirement.

For example, a wet-wipe manufacturer may need a fabric that can be unwound, cut, folded, and dispensed without tearing. In this case, the required strength should be based on actual converting and use conditions rather than a generic industry value.

5. Test 3: Wet Tensile Strength Testing

Dry tensile strength does not always predict the performance of spunlace fabric after it becomes wet.

For wet wipes, the fabric may be saturated with water, lotion, or another formulation before it is used. Liquid exposure can affect fiber interactions and the mechanical behavior of the fabric.

Wet tensile strength testing evaluates the fabric's resistance to breaking after a defined wetting procedure.

How wet tensile testing works

The test should specify:

• The liquid used for wetting.

• The amount of liquid or wetting procedure.

• The exposure time.

• The time between wetting and testing.

• Specimen dimensions.

• Test direction.

• Tensile test method.

• Number of specimens.

• Acceptance criteria.

A buyer should not compare two wet tensile results if the samples were prepared differently or exposed to different liquids for different periods.

Why this test matters

Wet tensile testing may be important for:

• Wet wipes that must remain intact during dispensing.

• Cleaning wipes exposed to water or cleaning solutions.

• Disposable towels intended for wet handling.

• Other products where strength after liquid exposure affects usability.

Wet tensile strength should not be treated as proof of flushability, dispersibility, biodegradability, or environmental safety. These are separate performance claims that require appropriate evidence.

6. Test 4: Elongation at Break

Elongation at break measures how much a specimen extends before it ruptures during a tensile test.

It is often reported as a percentage of the original gauge length.

The basic formula is:

Elongation (%) = Extension at break ÷ Original gauge length × 100

For example, if a specimen with an original gauge length of 100 mm extends by 30 mm before breaking, its elongation is 30%.

This is an illustrative calculation.

Why elongation matters

A fabric with adequate tensile strength may still behave differently during converting depending on how much it stretches under load.

Elongation testing can help buyers understand:

• How the fabric responds to pulling.

• Whether stretching may affect cutting or folding accuracy.

• How the material behaves during unwinding.

• Whether MD and CD performance differ significantly.

Higher elongation is not automatically better. The preferred result depends on the converting equipment and the finished product's design.

For example, a process requiring dimensional stability may benefit from controlled, consistent elongation rather than the highest possible stretch.

7. Test 5: Absorbency and Absorption Rate

Absorbency is a key functional property for many spunlace products, particularly wet wipes, facial wipes, disposable towels, and cleaning materials.

However, absorbency is not a single universal measurement. Different tests evaluate different aspects of liquid uptake.

A buyer may need to measure:

• How much liquid the fabric absorbs.

• How quickly the liquid is absorbed.

• How evenly liquid spreads through the material.

• How much liquid remains after a defined draining procedure.

• How well the fabric retains liquid under pressure, if relevant.

Mass-based absorption ratio

One way to express liquid uptake is to calculate the mass of absorbed liquid relative to the dry fabric mass.

Absorption ratio = (Wet mass − Dry mass) ÷ Dry mass

Suppose a specimen weighs 1.0 g when dry and 5.0 g after the agreed absorption procedure.

Absorption ratio = (5.0 − 1.0) ÷ 1.0 = 4.0 g/g.

Under those assumed conditions, the specimen has taken up 4.0 g of liquid per gram of dry fabric.

This is an illustrative result, not a recommended target for all spunlace materials.

How to conduct an absorbency test

A controlled test should define:

1. Specimen dimensions and initial conditioning.

2. The liquid used.

3. Liquid temperature, where relevant.

4. The immersion or contact procedure.

5. The absorption time.

6. The drainage or removal procedure.

7. The time before weighing.

8. The calculation method.

9. The acceptance criteria.

These details are important because changes in immersion time or drainage can produce different results even when the fabric is identical.

Absorbency versus absorption speed

A fabric may absorb a large amount of liquid but take longer to become fully wetted. Another fabric may wet quickly but retain less liquid.

Therefore, buyers should select the measurement that corresponds to their finished product's requirements.

For a fast-use cleaning wipe, rapid wetting may matter. For a product designed to hold a larger amount of lotion, total liquid uptake and retention may deserve more attention.

8. Test 6: Thickness Measurement

Thickness measures the distance between the two surfaces of a fabric under specified testing conditions.

It is relevant to products where bulk, cushioning, handling, or roll volume matters. However, thickness should not be used as a substitute for GSM, tensile strength, or absorbency.

Two fabrics with identical basis weight can have different thicknesses because of differences in fiber type, web structure, entanglement, and finishing.

How thickness is measured

A typical thickness test uses a suitable thickness gauge or instrument that applies a defined pressure to the specimen.

The reported result depends on several factors:

• Applied pressure.

• Contact area.

• Specimen conditioning.

• Number and location of measurements.

• Instrument accuracy.

• Whether the fabric is compressed or allowed to recover.

Because nonwoven fabrics can be compressible, results obtained using different pressures may not be directly comparable.

Thickness testing checklist

• Use the agreed test method.

• Check instrument calibration.

• Measure multiple representative locations.

• Record individual readings and the average.

• Compare results with the specified range.

• Investigate unusual variation across the fabric width.

Thickness is especially useful when a buyer needs to control fabric bulk, roll diameter, or compatibility with downstream equipment.

9. Test 7: Linting and Fiber-Shedding Evaluation

Linting refers to the release of fibers or particles from a material during handling, rubbing, wiping, or other use conditions.

It can be important for cosmetic wipes, polishing materials, precision cleaning, and applications where loose fibers may affect the finished product or the surface being cleaned.

However, there is no single simple visual test that proves a fabric is lint-free.

How to evaluate linting

A suitable procedure may involve controlled contact, rubbing, or another defined action followed by collection or assessment of released fibers or particles.

The method should identify:

• Contact material or surface.

• Applied force or pressure, where relevant.

• Number of rubbing cycles or duration.

• Specimen dimensions.

• Environmental conditions, if important.

• Collection and measurement procedure.

• Reporting units and acceptance limits.

The test should represent the intended application as closely as practical.

For example, a material used for polishing a sensitive surface may require a different linting assessment from a general household cleaning wipe.

What buyers should avoid

Do not accept claims such as “zero lint” or “lint-free” without understanding how they were evaluated. A supplier's general statement does not replace an agreed method and measurable acceptance criteria.

Where linting is critical, compare samples under the same test conditions and, if necessary, use a qualified laboratory.

10. Test 8: Softness and Surface Feel

Softness can strongly influence user experience in facial wipes, personal-care wipes, cosmetic products, and disposable towels.

Unlike GSM or tensile strength, softness is not always represented by a single measurement. It can involve bending behavior, surface friction, compressibility, flexibility, and human tactile perception.

Practical softness evaluation

For many purchasing projects, the first step is to compare samples against an approved reference.

Use a consistent procedure:

1. Keep the approved reference sample under suitable storage conditions.

2. Compare the reference and new samples under similar conditions.

3. Use the same evaluators and assessment criteria.

4. Record differences in surface feel, flexibility, and perceived roughness.

5. If required, select an appropriate instrumental method for more objective comparison.

An instrumental result should be interpreted according to the method used. One softness-related measurement may not fully represent how consumers perceive the finished product.

For repeat orders, retaining an approved sample is particularly useful because it provides a physical reference for future production.

11. Test 9: Visual Appearance and Surface Uniformity

Visual inspection is a basic part of spunlace nonwoven fabric testing. It can reveal visible defects that may affect converting efficiency or finished-product appearance.

Inspectors should look for:

• Holes and tears.

• Stains or contamination.

• Unusual streaks or bands.

• Severe variations in surface density.

• Excessive wrinkles or creases.

• Uneven edges.

• Visible foreign particles.

• Color variation.

• Surface damage.

• Unacceptable winding defects.

The inspection conditions should be reasonably consistent. Lighting, background, viewing distance, and inspection speed can influence whether defects are detected.

For large orders, the buyer should define the inspection scope and the criteria for critical, major, and minor defects.

Not every visible variation is necessarily a defect. Acceptance depends on the product specification and whether the variation affects performance or appearance.

For products with strict visual requirements, an approved visual reference can reduce disagreement between the buyer and supplier.

12. Test 10: Fiber Composition Verification

Fiber composition can affect absorbency, strength, softness, cost, and product labeling.

Spunlace fabric may use viscose, polyester, cotton, lyocell, or blends. Buyers should verify that the supplied material matches the composition stated in the order.

How to verify fiber composition

A practical verification process may include:

• Reviewing the supplier's technical data sheet.

• Checking the product specification and batch documentation.

• Confirming whether the stated composition is a target or a controlled requirement.

• Requesting suitable laboratory testing when composition is critical.

• Verifying supporting documentation for special material claims.

Visual inspection and hand-feel assessment alone are not reliable ways to confirm exact fiber percentages.

If a buyer requires a specific composition, such as a defined viscose/polyester blend or 100% cotton, that requirement should be stated clearly in the purchase order. Any tolerance or verification method should be agreed in advance.

Claims involving recycled content, biodegradable materials, or other special attributes also require appropriate evidence. A fiber name alone does not establish the environmental performance of the finished product.

13. Test 11: Width, Roll Weight, Length, and Winding

Laboratory tests do not cover every issue that can affect production. Roll dimensions and winding quality should also be verified before the fabric is approved.

A fabric that meets GSM and tensile requirements may still cause problems if the width is unsuitable for the converting machine or the roll is poorly wound.

Roll inspection items

The purchase agreement should state whether quantity is controlled by weight, length, area, or another measure. Buyers should not assume that the roll diameter alone establishes the exact fabric length.

For high-volume converters, roll configuration can be as important as the laboratory test results because poor winding or dimensional variation may lead to downtime and material waste.

14. Test 12: Packaging and Shipment Condition

Packaging inspection verifies that the fabric is adequately protected during storage and transportation.

This is especially important for international shipments where goods may experience multiple handling stages, long transit times, and changing environmental conditions.

Packaging inspection items

• Outer packaging is intact.

• Inner protection is suitable for the agreed application.

• No visible water damage or contamination is present.

• Roll ends and edges are protected as specified.

• Product labels match the purchase order.

• Batch or roll identification is available where required.

• Net weight or length information is correct.

• Carton, pallet, and shipping marks match the agreed requirements.

• Required inspection reports and shipping documents are available.

Packaging inspection cannot establish the fabric's mechanical or functional performance, but it can identify problems that may compromise the condition of the delivered goods.

For products with special cleanliness or regulatory requirements, packaging and handling conditions should be aligned with the applicable requirements rather than relying on general packaging practices.

15. Which Spunlace Tests Should You Choose for Your Application?

A good testing plan prioritizes properties according to the finished product's requirements.

The following table provides a starting point. It is not a universal test specification; buyers should adjust it to their application and risk level.

For medical and regulated applications, general fabric tests are only one part of qualification. A material passing tensile or absorbency tests does not automatically establish sterility, biocompatibility, medical-grade status, or compliance with a particular regulation.

16. How to Build a Practical Spunlace Quality Testing Plan

Testing is most effective when the buyer and supplier agree on the requirements before production begins.

A practical plan can be organized into five stages.

Stage 1: Define the specification

Identify the intended application, fiber composition, GSM, width, roll configuration, and performance requirements. Specify the test methods and acceptance criteria for each controlled characteristic.

Avoid vague requirements such as “high strength” or “good absorbency.” Define how those properties will be measured.

Stage 2: Approve a sample

Evaluate a representative sample using the tests that matter to the finished product. Retain the approved sample and record its specifications.

If the sample is used for a trial run, evaluate its behavior on the actual converting equipment where possible.

Stage 3: Verify production consistency

For repeat or high-volume orders, establish appropriate production controls and batch records. Depending on the risk, buyers may request test reports, inspect representative rolls, or arrange independent inspection.

Stage 4: Inspect before shipment

Select rolls according to the agreed sampling plan. Conduct visual, dimensional, and laboratory checks as required. Record actual results rather than reporting only that the material “passed.”

Stage 5: Review delivery performance

After receiving the material, record any issues found during converting or use. Share relevant evidence with the supplier and determine whether the cause relates to material properties, handling, storage, or processing conditions.

Over time, this feedback can help buyers improve specifications and focus testing resources on the characteristics most likely to affect production.

17. How to Compare Results From Different Suppliers

Testing is particularly valuable when comparing two or more suppliers.

However, a comparison is meaningful only when the samples are evaluated using consistent conditions.

For a fair comparison:

1. Request samples with the same target fiber composition and GSM.

2. Confirm that the samples are representative of the products being quoted.

3. Use the same test methods and specimen preparation.

4. Compare MD and CD tensile strength separately.

5. Evaluate absorbency using the same liquid and procedure.

6. Compare visual appearance and softness against the same reference.

7. Review roll dimensions, packaging, and documentation.

8. Consider test variation rather than focusing only on the best individual result.

9. Assess whether the material performs adequately on the intended equipment.

10. Compare total production cost, including waste and downtime risk, rather than purchase price alone.

Example: Comparing two hypothetical suppliers

Suppose a buyer is evaluating two nominally 50 GSM spunlace fabrics for wet wipes.

This example illustrates a comparison process, not actual supplier performance data.

Even when both suppliers quote the same GSM, the buyer should not make a final decision until the missing information has been resolved and the relevant tests are comparable.

A supplier with a lower price may not provide the lower total cost if the fabric causes more waste, slower production, or a higher rejection rate.

18. Common Mistakes in Spunlace Fabric Testing

Mistake 1: Testing GSM but ignoring functional properties

GSM confirms mass per area, not complete fabric performance.

Better approach: Add tensile, absorbency, or other application-specific tests when those properties affect the finished product.

Mistake 2: Comparing test results without checking the methods

Different specimen dimensions, conditioning conditions, or procedures can produce results that are not directly comparable.

Better approach: Specify the test method and conditions in advance.

Mistake 3: Using one specimen to represent a whole shipment

A single specimen may not capture variation across the roll or between rolls.

Better approach: Establish a representative sampling plan based on lot size and product risk.

Mistake 4: Treating softness as a fully objective measurement

Hand-feel assessments can be useful but are influenced by individual perception.

Better approach: Use an approved reference sample and consider instrumental evaluation where necessary.

Mistake 5: Assuming dry strength guarantees wet performance

Some products are used after being saturated with liquid.

Better approach: Specify wet tensile testing when wet handling strength matters.

Mistake 6: Testing properties unrelated to the actual application

A long laboratory report does not necessarily mean the material is suitable for the buyer's product.

Better approach: Start with the intended application and select tests based on real performance requirements.

Mistake 7: Setting acceptance limits after testing

Changing the criteria after receiving the results can create disputes and undermine supplier accountability.

Better approach: Agree on the specifications, methods, and acceptance rules before production.

19. Frequently Asked Questions About Spunlace Nonwoven Fabric Testing

1. What is the most important test for spunlace nonwoven fabric?

GSM is a common starting point, but there is no single test that establishes overall quality. Buyers often need to combine GSM, tensile strength, visual inspection, and application-specific tests such as absorbency or linting.

2. Which standards are used for spunlace nonwoven fabric testing?

Relevant parts of the ISO 9073 series cover several nonwoven test methods, including basis weight, thickness, and tensile properties. Other standards or application-specific procedures may be appropriate. Buyers should confirm the exact standard and edition with their testing laboratory and specify it in the purchase agreement.

3. How do I test spunlace fabric GSM?

Cut or prepare a specimen with a known area, weigh it using a suitable calibrated balance, and divide its mass in grams by its area in square meters. Take representative samples and compare individual results with the agreed tolerance.

4. Why should tensile strength be tested in both directions?

MD and CD tensile strength can differ because of fabric structure and fiber orientation. Testing both directions helps identify weaknesses that could affect slitting, folding, dispensing, and other converting operations.

5. Is wet tensile testing necessary for all spunlace fabrics?

No. It is particularly relevant when the material must maintain strength after liquid exposure, such as in many wet-wipe applications. The need for testing should be based on the product's intended use.

6. How is spunlace fabric absorbency measured?

Absorbency can be evaluated through a defined liquid-uptake procedure. The method should specify the liquid, specimen preparation, exposure time, drainage procedure, and calculation. Results should only be compared when the test conditions are consistent.

7. Can I measure softness with a simple hand test?

Hand-feel comparison can be useful during initial sample evaluation, especially when an approved reference is available. However, it is subjective and should not be treated as a precise quantitative measurement.

8. What is the difference between GSM and thickness?

GSM measures mass per unit area, while thickness measures the distance between the fabric surfaces under specified conditions. Two fabrics with the same GSM can have different thicknesses.

9. How many samples should be tested?

The number depends on the shipment size, product risk, supplier history, and agreed sampling plan. The plan should specify the number of rolls, the number of specimens, and the acceptance criteria before inspection.

10. Should I use an independent laboratory?

An independent laboratory can be useful when test results are disputed, the property is critical, or an objective comparison between suppliers is needed. The laboratory should use a suitable method and report the test conditions clearly.

11. Does passing fabric tests mean the finished wipes are compliant?

No. Fabric testing evaluates specified material characteristics. Finished-product compliance may require additional testing, documentation, manufacturing controls, or regulatory assessment depending on the application and destination market.

12. How can testing reduce my purchasing costs?

Testing can identify unsuitable materials before large-scale production or shipment. This can reduce waste, converting downtime, rejected products, and disputes. The value comes from preventing avoidable problems, not simply from performing more tests.

Conclusion

The right spunlace fabric testing methods help buyers evaluate material consistency, verify supplier claims, and reduce avoidable production problems.

Start with the core properties: GSM, tensile strength in MD and CD, visual appearance, and dimensional consistency. Add wet tensile strength, absorbency, linting, softness, thickness, or fiber-composition verification according to the intended application.

Most importantly, use consistent test methods, representative samples, written acceptance criteria, and traceable records. This makes supplier comparisons more objective and gives both parties a clearer basis for quality decisions.

If you are sourcing spunlace nonwoven fabric for wet wipes, cosmetic products, disposable towels, or industrial applications, prepare a specification that explains how the material will be used and which properties must be controlled.

MINGYU supplies nonwoven fabric for a range of converting applications. Contact the team with your target GSM, fiber composition, fabric width, roll requirements, and intended use to discuss a suitable product specification and sample evaluation process.