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What is "Raising" - Definition & Explanation
Last Updated on: 18-Jan-2023 (1 year, 1 month, 10 days ago)
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The Raising Process: Enhancing Fabric One Fiber at a Time


The Raising Process in Textiles: An In-Depth Look

The Origin and Evolution of the Raising Process

Raising is a finishing process in the textile industry aimed at enhancing the warmth, softness, and insulating properties of fabric. This process can be traced back to as early as the 14th century, when teasel plant burrs were used to raise the fibers in cloth. With the Industrial Revolution in the 18th century, mechanical raising machines were introduced, greatly improving efficiency and quality. Modern technologies, including infrared heaters and high-speed brushes, have further advanced the process, allowing greater precision and uniformity.

Types of Raising

  • Single-Sided Raising: Only one side of the fabric is raised.
  • Double-Sided Raising: Both sides of the fabric are raised.
  • Multiple Raising: The fabric undergoes the raising process more than once for increased fluffiness.
  • Random Raising: The raising process is carried out in an uncontrolled manner to create a unique, irregular finish.
  • Precision Raising: The raising process is controlled to produce a highly uniform finish.

Tips for the Raising Process

  • Choosing the right kind of brush according to fabric type and desired effect is crucial.
  • Controlling speed and pressure during the process can affect the uniformity and quality of the raised fabric.
  • Pre-shrinking the fabric before raising can help in preventing further shrinkage and deformation.
  • After the raising process, the fabric should be properly sheared and singed to remove excess or loose fibers.
  • Maintaining the machine properly and regular cleaning can help in achieving a better finish and prolong machine life.

International Manufacturers and Users of the Raising Process

  • Lafer S.p.A.: An Italian company known for producing high-quality textile finishing machinery, including raising machines. They have been at the forefront of technological advancements in the field, providing equipment to textile industries worldwide.
  • Mario Crosta Srl: Another Italian leader in the textile machinery sector, Mario Crosta offers a variety of raising machines for different materials and requirements.
  • T. Rowe Price: A renowned American investment firm, T. Rowe Price has invested significantly in textile machinery industries, including those producing raising machines.
  • North Face: An American outdoor recreation product company, North Face frequently uses fabrics that have undergone the raising process in its clothing lines.
  • Pendleton Woolen Mills: A family-owned, American textile manufacturing company, Pendleton produces a variety of wool products that utilize the raising process to enhance their warmth and comfort.

Applications of the Raising Process

  • Fleece Fabric: The raising process helps in creating a soft, fluffy texture on one or both sides of the fabric, increasing its insulating properties.
  • Flannel: Raising is used to give flannel its characteristic nap and softness.
  • Upholstery: The process is also used in creating upholstery fabrics with a soft touch and luxury feel.
  • Blankets and Bedding: The raised fibers increase the fabric's ability to retain heat, making it ideal for blankets and bedding.

Conclusion

The raising process plays a significant role in the textile industry, creating fabrics that are not only aesthetically pleasing but also functional. Its ability to enhance the feel and insulating properties of fabric makes it a popular choice for various applications, from clothing to home dcor. With advancements in technology and machinery, the process continues to evolve, offering new possibilities in the world of textiles.


Raising
Raising is a textile finishing process that involves brushing a fabric to raise the fibers on its surface. This creates a soft, fuzzy texture and enhances the fabric's insulating properties. The process can be applied to various types of fabrics, including wool, cotton, and synthetics, and is commonly used in the production of blankets, upholstery, and clothing.

The raising process involves passing a fabric over a series of rollers that contain metal teeth or brushes. As the fabric moves over the rollers, the teeth or brushes agitate the fibers on the surface of the fabric, causing them to stand up. This creates a fuzzy surface on the fabric, which is then sheared to a uniform height. The result is a soft, plush texture that feels warm and cozy to the touch.

Raising can be done in various degrees of intensity, depending on the desired outcome. A light raising produces a subtle texture, while heavy raising creates a deep, fluffy nap. Additionally, different types of brushes or rollers can be used to create specific textures or patterns on the fabric's surface.

There are several benefits to raising fabric. Firstly, it increases the fabric's insulating properties by trapping air between the raised fibers, making it a popular choice for blankets, winter wear, and home decor. Additionally, raising can improve the fabric's durability by reducing pilling, which is the formation of small balls of fiber on the surface of the fabric. Raising also enhances the appearance of the fabric, giving it a soft, luxurious texture that is visually appealing.

Raising is a popular finishing technique in the textile industry, and many manufacturers use it to add value to their products. Woolrich, a U.S.-based clothing and outdoor gear manufacturer, is known for using raising in its wool blankets and clothing. Pendleton, another U.S.-based woolen mill, also utilizes raising in its blankets and apparel. In Europe, companies like Loro Piana and Vitale Barberis Canonico use raising to create luxurious wool fabrics for high-end fashion brands.

In addition to traditional wool fabrics, raising is also used on cotton and synthetic fabrics. Hanes, a U.S.-based clothing manufacturer, uses raising in its fleece garments, which are popular for their softness and warmth. Restoration Hardware, a home furnishings retailer, utilizes raising in its plush velvet upholstery fabrics.

While raising is a popular finishing technique, it does have some drawbacks. The process can cause shrinkage in some fabrics, especially those that are not pre-shrunk. Additionally, raising can cause the fabric to shed, which can be a problem for people with allergies. However, many manufacturers have developed techniques to mitigate these issues, such as pre-shrinking fabrics or using anti-pilling treatments.

In conclusion, raising is a textile finishing process that involves brushing a fabric to raise the fibers on its surface. It creates a soft, plush texture that is visually appealing and enhances the fabric's insulating properties. Raising can be done in various degrees of intensity, and different types of brushes or rollers can be used to create specific textures or patterns. Many manufacturers use raising to add value to their products, and it is a popular finishing technique in the textile industry. However, it does have some drawbacks, such as the potential for shrinkage and shedding. Overall, raising is a versatile technique that can be used to enhance the look and feel of various types of fabrics.
Raising
The production of a layer of protruding fibres on the surface of fabrics by brushing, teazling or rubbing.

NOTE:

The fabric, in open width, is passed between rotating rollers covered with teazles, fine wires, carborundum, etc., whereby the surface fibres are lifted or broken to give the required effect.
Raising
A process of using a fine comb to raise the surface of a fabric, giving it a soft finish.

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