Carpet - Wacker Chemie AG


Carpet

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Superior Chemistry for Carpet Backings

Products based on vinyl acetate-ethylene (VAE) copolymers have always enjoyed a sizable share of the carpet-backing industry. The reason lies in the specific structure of VAE copolymers which allow strength and flexibility to be optimized – these characteristics are especially valuable for carpet backings.

Unique Properties

Like styrene-butadiene (SB) latex, VAE dispersions consist of two building blocks, in this case vinyl acetate, which delivers stiffness, and ethylene, which provides flexibility. By varying the ratio of the two monomers, it is possible to adjust specific application properties, such as hand. The ethylene component in the VINNAPAS® carpet backing dispersion internally plasticizes the products and results in inherently high adhesive strength, which maintains good flexibility, allowing VAE to be used, e.g., as precoat layer and/or secondary coating in tufted carpet applications.

The modern generation of VINNAPAS® VAE copolymer dispersions provides carpets with tuft bind and delamination strength that readily compete with carpets backed with SB latex.

The inherent advantages of VAE ensure that carpet backings have a significantly reduced odor, which is an advantage both during production and in the end product.

A Technology with Many Advantages

VINNAPAS® dispersions based on vinyl acetate-ethylene (VAE) meet all technical requirements made for carpet-backing applications. They are therefore suitable for tufted broadloom carpet and tile production, and for woven and needlefelt applications. In addition, VINNAPAS® VAE dispersions excel in terms of low odor, low emissions and flammability resistance.

General Advantages

  • Hand can be adjusted by varying the ethylene content
  • Good adhesion to a range of fibers commonly used in carpet production
  • Low odor
  • Low emissions
  • Low flammability
  • Reduced smoke

Application Advantages

  • Good tuft bind
  • Good delamination
  • Good cut edge stability
  • Excellent dimensional stability

Processing Advantages

  • Excellent compounding properties
  • Good filler load capacity
  • Excellent foamability
  • Good processability

What VAE Can Do for You in Your Specific Market

Tufted Broadloom Carpet

In tufted broadloom carpet, VINNAPAS® VAE dispersions are used in precoats and secondary coatings for the following technical reasons:

  • Good filler load
  • Good penetration and fiber adhesion (bond strength)
  • Compatibility with formulation additives
  • Good thickener response
  • Good flame-retardant properties

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Tufted Carpet Tiles

In carpet tiles, VINNAPAS® VAE dispersions act as the precoat, where they offer the following advantages:

  • Desired stiffness and durability
  • Good plasticizer resistance
  • Good compatibility with other system components, e.g. PVC, bitumen
  • Low tendency to curl or "dome" after installation

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Woven Carpet

VINNAPAS® VAE dispersions serve as the coating for woven carpets because they confer:

  • Cut-edge stability
  • Dimensional stability
  • Hand/flexibility
  • Tuft bind flame-retardant properties

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