How to measure the shrinkage rate of Interlock Knit Fabric?

Measuring the shrinkage rate of interlock knit fabric is a crucial aspect of quality control in the textile industry. As a supplier of interlock knit fabric, I understand the significance of providing accurate information about shrinkage to our customers. In this blog post, I will share some insights on how to measure the shrinkage rate of interlock knit fabric effectively.

Understanding Interlock Knit Fabric

Interlock knit fabric is a double-knit fabric that has a smooth, flat surface on both sides. It is known for its durability, stretchability, and excellent drape. This type of fabric is commonly used in the production of T-shirts, underwear, sportswear, and other clothing items. The unique structure of interlock knit fabric gives it certain properties that can affect its shrinkage behavior.

Factors Affecting Shrinkage

Before we delve into the measurement process, it's important to understand the factors that can cause shrinkage in interlock knit fabric. These factors include:

• Fiber Type: Different fibers have different shrinkage characteristics. For example, natural fibers like cotton tend to shrink more than synthetic fibers like polyester.
• Weave and Knit Structure: The way the fabric is woven or knitted can also influence its shrinkage. Interlock knit fabric, with its double-knit structure, may have different shrinkage properties compared to single-knit fabrics.
• Finishing Processes: Chemical treatments and finishing processes applied to the fabric can affect its shrinkage. For instance, fabrics that have been pre-shrunk or treated with anti-shrink agents will have lower shrinkage rates.
• Washing and Drying Conditions: The way the fabric is washed and dried can have a significant impact on its shrinkage. High temperatures, harsh detergents, and aggressive drying methods can all cause the fabric to shrink.

Measuring the Shrinkage Rate

To measure the shrinkage rate of interlock knit fabric, you will need the following materials:

• A sample of the interlock knit fabric
• A ruler or measuring tape
• A washing machine
• A dryer
• A flat surface

Here are the steps to measure the shrinkage rate:

1. Prepare the Fabric Sample: Cut a sample of the interlock knit fabric that is at least 10 inches by 10 inches. Make sure the sample is representative of the entire fabric roll.
2. Measure the Initial Dimensions: Use a ruler or measuring tape to measure the length and width of the fabric sample. Record these measurements accurately.
3. Wash the Fabric Sample: Place the fabric sample in the washing machine and use a mild detergent. Set the washing machine to a gentle cycle and use cold water. Avoid using fabric softeners or bleach.
4. Dry the Fabric Sample: After washing, remove the fabric sample from the washing machine and gently squeeze out any excess water. Do not wring the fabric. Place the fabric sample in the dryer and set it to a low heat setting. Remove the fabric sample from the dryer as soon as it is dry.
5. Measure the Final Dimensions: Once the fabric sample is dry, lay it flat on a surface and use a ruler or measuring tape to measure the length and width again. Record these measurements.
6. Calculate the Shrinkage Rate: To calculate the shrinkage rate, use the following formula:
   Shrinkage Rate (%) = [(Initial Dimension - Final Dimension) / Initial Dimension] x 100
   Calculate the shrinkage rate for both the length and width of the fabric sample. Then, take the average of these two rates to get the overall shrinkage rate of the fabric.

Tips for Accurate Measurement

To ensure accurate measurement of the shrinkage rate, here are some tips to keep in mind:

• Use a Representative Sample: Make sure the fabric sample you use is representative of the entire fabric roll. Cut the sample from different parts of the roll to account for any variations in shrinkage.
• Follow Standard Washing and Drying Procedures: Use the same washing and drying conditions for all fabric samples to ensure consistency. Follow the manufacturer's instructions for washing and drying the fabric.
• Allow the Fabric to Relax: After washing and drying, allow the fabric to relax for at least 24 hours before measuring the final dimensions. This will give the fabric time to fully recover from the washing and drying process.
• Repeat the Measurement: To increase the accuracy of the measurement, repeat the process at least three times and take the average of the shrinkage rates.

Importance of Measuring Shrinkage

Measuring the shrinkage rate of interlock knit fabric is important for several reasons:

• Quality Control: By measuring the shrinkage rate, you can ensure that the fabric meets the quality standards of your customers. This helps to prevent customer complaints and returns.
• Product Development: Understanding the shrinkage behavior of the fabric can help you in the product development process. You can choose the right fibers, weave, and finishing processes to minimize shrinkage and improve the quality of your products.
• Customer Satisfaction: Providing accurate information about the shrinkage rate of the fabric to your customers can help them make informed decisions when purchasing your products. This can lead to increased customer satisfaction and loyalty.

Conclusion

Measuring the shrinkage rate of interlock knit fabric is an essential part of quality control in the textile industry. By following the steps outlined in this blog post and using the tips provided, you can accurately measure the shrinkage rate of your interlock knit fabric. This will help you to ensure the quality of your products, improve customer satisfaction, and stay competitive in the market.

If you are interested in purchasing Cationic Interlock Knit Fabric or other types of interlock knit fabric, please feel free to contact us for more information. We are a leading supplier of high-quality interlock knit fabric and would be happy to discuss your requirements and provide you with a quote.

References

• ASTM D2259 - Standard Test Method for Dimensional Changes of Knit Fabrics After Home Laundering
• AATCC Test Method 135 - Dimensional Changes of Fabrics After Home Laundering