Introduction

When purchasing raw materials for diapers, sanitary napkins, adult incontinence products, underpads or other disposable hygiene products, buyers often receive a Technical Data Sheet (TDS) from their suppliers.

A TDS may contain many technical terms, numbers, units and test methods. For experienced engineers, these specifications are familiar. For purchasing teams, brand owners and new buyers, however, it can be difficult to understand which numbers really matter.

A TDS is more than a technical document. It provides a common reference for buyers and suppliers when discussing material specifications, product performance and application requirements.

This guide explains how to read a hygiene raw material TDS, which specifications deserve attention, how to compare different suppliers and what buyers should confirm before placing a bulk order.

1. What Is a Technical Data Sheet (TDS)?

1.1 What Information Does a TDS Provide?

A Technical Data Sheet is a document that describes the technical characteristics of a specific raw material or product grade.

Depending on the material, a TDS may include:

· Product name and grade

· Material composition

· GSM or basis weight

· Thickness

· Width and dimensions

· Physical properties

· Mechanical properties

· Absorption or fluid-handling performance

· Breathability or barrier performance

· Color and appearance

· Recommended applications

· Test methods

· Specification ranges

The exact information depends on the material.

For example, a nonwoven TDS may focus on GSM, thickness, tensile strength, elongation and liquid handling performance. A PE film TDS may include thickness, tensile properties, breathability and water resistance. A SAP TDS may focus more on absorption-related performance and particle size.

Therefore, buyers should not expect every raw material to use the same set of specifications.

1.2 Why Is a TDS Important for Hygiene Raw Material Buyers?

A TDS helps buyers understand exactly what they are purchasing.

Two suppliers may both offer “hygienic nonwoven” or “diaper-grade SAP,” but their actual specifications may be different.

Without technical specifications, buyers may compare products mainly by:

· Price

· Product name

· Appearance

· Supplier description

This can create problems later.

A lower-priced material may have a different GSM, performance level, width, strength or processing characteristic.

Reading the TDS allows buyers to make a more meaningful comparison between different materials and suppliers.

2. Key Specifications Buyers Should Check

2.1 Material Type and Grade

The first thing to check is the exact material type and grade.

For example, nonwoven materials can differ according to:

· Raw polymer or fiber type

· Manufacturing process

· Hydrophilic or hydrophobic treatment

· Softness

· Strength

· Intended application

SAP can also be supplied in different grades with different absorption-related characteristics.

The product name alone is not enough.

Buyers should confirm the exact grade and intended application before comparing quotations.

2.2 GSM, Thickness and Dimensions

GSM means grams per square meter and is commonly used for nonwoven fabrics, films and other sheet materials.

For many hygiene materials, GSM directly affects material consumption and product construction.

Buyers should also check:

· Thickness

· Width

· Roll length

· Roll diameter, when relevant

· Core size

· Weight per roll

These specifications are especially important because the material must match the buyer's production equipment.

A material can have good technical performance but still be unsuitable if its dimensions do not match the production line.

2.3 Physical Properties

Physical properties describe characteristics that can affect handling and production performance.

Depending on the material, these may include:

· Tensile strength

· Elongation

· Thickness

· Density

· Moisture

· Particle size

· Surface characteristics

For nonwoven materials, machine direction (MD) and cross direction (CD) properties may be listed separately.

This is important because the material may behave differently in different directions during high-speed production.

2.4 Functional Performance

Functional specifications are often the most important part of a hygiene raw material TDS.

For absorbent materials, buyers may need to consider absorption-related performance.

For liquid-handling nonwovens, relevant properties may include fluid acquisition, strike-through and rewet performance.

For breathable PE film, buyers may focus on breathability and barrier-related performance.

The key point is that buyers should connect the TDS specification with the final product function.

A number is meaningful only when you understand what role it plays in the finished hygiene product.

2.5 Application and Processing Requirements

A good TDS should also help buyers understand where the material is intended to be used.

For example, a material may be designed for:

· Baby diapers

· Adult incontinence products

· Sanitary napkins

· Panty liners

· Underpads

· Other disposable hygiene products

Some materials may also have specific processing requirements.

Before placing an order, buyers should confirm whether the material is compatible with their production equipment, speed and product design.

3. How to Understand TDS Values

3.1 Typical Values vs. Specification Limits

One of the most important things to understand is that not every number on a TDS has the same meaning.

A supplier may provide a typical value, while another specification may represent a required limit.

For example:

GSM: 25 ± 2 gsm

This indicates a target value of 25 gsm with an acceptable variation defined by the supplier.

By contrast:

Tensile Strength: ≥ 30 N/5 cm

means the result should meet or exceed the specified minimum.

Buyers should understand whether each number represents a target, typical production result, minimum requirement or maximum limit.

3.2 Minimum and Maximum Values

Some specifications are given as a range.

For example:

Width: 100–120 mm

or:

Moisture: ≤ 5%

These two formats have different meanings.

A range defines an acceptable interval, while “≤” or “≥” establishes a limit.

When comparing suppliers, buyers should make sure they are comparing equivalent specification formats.

3.3 Tolerance and Acceptable Variation

Manufacturing processes naturally have some variation.

For example, a material with a target GSM may not measure exactly the same at every point or in every production batch.

This is why tolerances are important.

Buyers should pay attention to whether the supplier specifies:

· Target value

· Tolerance

· Minimum value

· Maximum value

· Standard range

Understanding tolerance can help prevent misunderstandings between the buyer and supplier during incoming inspection.

3.4 Test Methods and Conditions

A technical number is difficult to compare if the test method is different.

For example, two suppliers may both provide a tensile strength value, but if they use different testing methods or test conditions, the results may not be directly comparable.

A professional TDS may therefore include:

· Test method

· Testing standard

· Test conditions

· Unit of measurement

When comparing two materials, buyers should check not only the result but also how the result was obtained.

4. TDS vs. COA: What Is the Difference?

4.1 What Is a TDS?

A TDS describes the technical characteristics of a product or material grade.

It is generally used to explain what the product is designed to achieve and what specifications buyers can expect.

A TDS can be used during:

· Product selection

· Supplier comparison

· Sample evaluation

· Technical discussions

· Production planning

4.2 What Is a COA?

COA stands for Certificate of Analysis.

A COA is normally associated with a specific production batch or lot and reports the actual test results for that batch.

In simple terms:

TDS = What the material is specified to be

COA = What a particular batch was tested to be

The two documents therefore serve different purposes.

4.3 Why Buyers May Need Both

A TDS can help a buyer decide whether a material is suitable.

A COA can help verify the characteristics of a specific shipment or production batch.

For regular bulk purchasing, having both documents can provide a clearer connection between the agreed product specification and the actual delivered material.

5. What Should Buyers Check Before Ordering Samples?

Before requesting samples, buyers should first define their basic technical requirements.

A useful checklist includes:

1. Application

What product will the material be used for?

2. Production equipment

What machine and production process will be used?

3. Dimensions

What GSM, width, thickness or roll specifications are required?

4. Performance

What technical performance does the finished product require?

5. Quality requirements

Are there specific limits for strength, moisture, absorption or other properties?

6. Certifications

Does the material need to meet specific customer, market or product requirements?

7. Packaging

What roll size, packing method and labeling requirements are needed?

The more clearly these requirements are defined before sampling, the easier it becomes to compare suppliers.

6. Common Mistakes When Reading a Raw Material TDS

6.1 Comparing Prices Without Comparing Specifications

One of the most common mistakes is comparing suppliers only by price.

For example, Supplier A may offer a lower price, but the material may have a different GSM, grade or performance level.

A lower price does not necessarily mean a lower total cost.

Buyers should first make sure that the materials being compared have comparable specifications.

6.2 Looking at One Performance Parameter Only

Another mistake is focusing on a single number.

For example, when evaluating an absorbent material, buyers should not assume that one absorption value represents the entire performance of the finished product.

The final performance can depend on multiple materials and how they work together.

The same principle applies to nonwoven, PE film and other hygiene materials.

6.3 Ignoring Test Methods

A number without its test method may not tell the complete story.

When comparing two suppliers, always check whether the same or comparable test method was used.

If the methods are different, ask the supplier for clarification before making a purchasing decision.

6.4 Assuming Every Material With the Same Name Is Equivalent

“Nonwoven,” “SAP,” “PE film” and other product names describe broad material categories.

They do not necessarily describe identical products.

Different grades can have different:

· Performance

· GSM

· Thickness

· Strength

· Processing characteristics

· Applications

This is why the complete specification should be reviewed instead of relying only on the product name.

7. A Practical TDS Checklist for Hygiene Raw Material Buyers

Before approving a raw material, buyers can use the following checklist:

Product Information

· Product name

· Product grade

· Material type

· Intended application

Physical Specifications

· GSM

· Thickness

· Width

· Length or roll specifications

· Color

· Appearance

Performance

· Key functional properties

· Minimum or maximum values

· Typical values

· Required tolerances

Testing

· Test methods

· Testing standards

· Units

· Testing conditions

Production Compatibility

· Machine compatibility

· Processing requirements

· Recommended application

· Packaging and roll specifications

Quality Documentation

· TDS

· COA, when applicable

· Sample test results

· Relevant certifications

Using this checklist can make supplier comparison much more systematic.

Instead of asking only, “What is your price?”, buyers can ask:

“What are the exact specifications of the material, and how do they compare with our production requirements?”

That question can lead to a much more productive technical discussion.

8. Conclusion

A Technical Data Sheet is one of the most useful documents for buyers sourcing hygiene raw materials.

It provides a technical foundation for comparing materials, evaluating samples and communicating requirements with suppliers.

However, buyers should not simply look for the highest number on a TDS. The right material depends on the complete specification, intended application, production process and final product requirements.

For materials such as nonwoven, SAP, fluff pulp, PE film and other hygiene components, understanding the TDS can help buyers make more informed decisions and reduce the risk of choosing a material that does not match their production needs.

For hygiene manufacturers and procurement teams, the goal is not simply to find a material with a good-looking specification sheet. The goal is to find a consistent material with specifications that match the actual product and production requirements.