ISO 13938 Activewear Fabric Bursting Strength Test Guide

In 2026, a production line failure costs more than ever before. Seam bursts hurt your profits. Stitches that pop during fitting hurt your profits. Entire batches rejected for quality issues hurt your profits. These are not just small problems. They take a direct hit on your money.

The root cause is typically overlooked in the process of sourcing materials. The issue is the activewear fabric bursting strength is weak. This is particularly relevant for garments that are subjected to great strain, such as leggings and compression tops. The guide contains valuable information about the Bursting Strength Test (ISO 13938). It states how to select the right fabric. In particular, interlock is superior to single jersey for this purpose. It leads to a more durable product and increased profits for the company.

Key Takeaways

• The ISO 13938 bursting strength test simulates how fabric resists pressure from all sides like real-world activewear does.
• Interlock fabric (also known as Double Jersey) is more efficient than single jersey. Simply by offering a far higher bursting strength, it prevents popping seams.
• Interlock is a stable, non-curling fabric suggested by FORALLTEX's D036 for your manufacturing needs. It cuts down on both fabric waste and lead times.
• Emphasizing high-performance fabrics means fewer quality rejections. Thus, the total cost per approved garment is reduced.

What is the Fabric Bursting Strength Test (ISO 13938)?

Activewear fabric experiences simultaneous stress from different angles. The common pull test performs only uniaxial elongation of the fabric. The results do not represent the same conditions. The model of bursting strength tests illustrates physical forces acting on the fabric at the same time.

The steps are straightforward. The fabric is secured over a flexible rubber part. The pressure is then applied through a fluid or air source. This causes the rubber to expand, thereby pushing outward against the fabric.

The pressure it takes to rupture the fabric is recorded in kilopascals (kPa). This value is the bursting strength. Using the ISO 13938 standard ensures that the results in your Tech Pack stay identical. The results can be compared across different suppliers. As pointed out by The fabric bursting strength test procedure, this technique is paramount in determining the characteristics of fabrics under triaxial tension.

Fabric Structure is Non-Negotiable: Why Interlock Outperforms Single Jersey

Your choice of knit structure directly impacts how long garments last. High-stress activewear interlock single jersey hands down.

Single Jersey Weaknesses

Single jersey uses one set of needles. This creates a simple loop structure. On the factory floor, this creates two big problems. First, the structure is weak under stress. Therefore, activewear fabric bursting strength will be lower.

Second, single jersey fabric keeps curling. This curl wastes material. It forces cutting teams to work slower and more carefully. This extends your overall lead time.

Interlock (Double Jersey) Strengths

Interlock fabric is classified as Double Jersey. It is constructed with two sets of needles. This results in two identical sides that are locked together. The structure remains stable.

The stitches that are "locked" together distribute the load more evenly than the ones that are "unlocked" together. This increases the bursting strength significantly. For the production process, the most important thing is that the edges of the fabric rest perfectly flat. This allows the manager to layout and cut interlock far faster than curling single jersey. Less waste, improved yield, and reduced costs all result from this.

The Technical Deep Dive: FORALLTEX D036 Physical Data

The superior performance of interlock fabric is attributed to special choices made in the selection of materials and construction methods.

Craftsmanship & Material Depth

We have constructed the D036 Interlock to be the best in terms of performance, starting from the yarn used. It is made of Nylon 6 which is premium 40D/36F. The 36F filament count is higher and makes it smoother and softer without sacrificing strength. This yarn is further blended with high-end Creora® Elastane that provides excellent stretch and recovery.

Our piece-dyeing procedure guarantees an intense color and consistency between batches. The last finishing process locks in the stability of the fabric. The flat non-curling edges that production teams require for effective cutting and printing are ensured.

Our D036 Nylon Spandex Interlock is the industry's benchmark for high-definition digital print bases. Thanks to the dense "One-Open-One-Close" knitted structure, it has the flatness of a canvas. It, therefore, resists the warping and distortion that occur with less robust materials. This focus on quality is in line with global standards to measure textile durability.

The ROI Calculator: How D036 Saves You Money

Let's look at the true cost beyond the price per kilogram. A cheap low-quality curling single jersey is not a good deals. Its hidden costs are enormous. For a contract of 10,000 pieces, clients are reporting substantial savings.

In the first place; interlock's stable construction provides higher yield. That means you will get more garment pieces for every kg. An enhancement of 3-5% in yield goes directly to your profit. Secondly, the non-curling edges of D036 Nylon Spandex Interlock can save an extra 2-4% of fabric. This fabric normally gets lost to edge trim waste. This also speeds up cutting and shortens your production lead time. Most importantly, quality rejections are avoided by using proven anti-yellowing material such as our D083 Air-Sculpt Fabric hence protecting your profit and sports bras.

FAQ: Your Questions on Activewear Fabric Strength Answered

What is a good bursting strength value for high-performance leggings?

For high-compression, durable activewear, we recommend at least 400 kPa bursting strength. Premium fabrics like our D036 exceed 550 kPa. This offers a big safety margin against seam popping during intense activity.

Can you use a single jersey for activewear?

Yes, but it works best for lower-stress uses like loose-fitting t-shirts. For form-fitting garments that stretch a lot, interlock or other double-knit fabric is much safer and more durable. This prevents bursting.

How does yarn count (e.g., 20D vs 40D) affect bursting strength?

Generally, higher denier (D) yarn like 40D is thicker and stronger than 20D yarn. This helps overall fabric strength, including bursting and wear resistance. The choice depends on the desired balance of durability, weight, and feel.

What is the typical MOQ for custom-dyed interlock fabrics?

At FORALLTEX (Haining Forall Digital Technology Co., Ltd.), our standard Minimum Order Quantity (MOQ) for custom colors is typically around 300-500 kg. This depends on the specific fabric. This allows for efficient dye lots. We can discuss your project needs to find the best solution.

How do I request fabric samples or Strike-offs?

Simply contact our sales team with your Tech Pack or performance requirements. We can provide sample yardage for prototyping and lab-dip Strike-offs for color approval before committing to a bulk order.

Partner with FORALLTEX for Quality That Pays for Itself

Choosing the right fabric is the most important decision in garment making. It's not about cost per meter. It's about the final cost per quality-approved garment. By focusing on high activewear fabric bursting strength with technically better material like our D036 Interlock, you invest in product life, brand reputation, and more efficient, profitable production.

Don't let your next collection suffer from seam failures. Contact FORALLTEX today. Send us your Tech Pack. Let our experts recommend the perfect fabric solution to enhance your product and your profits.