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Development of Spunlace Wound Dressings Using Bamboo Fibres

Investigators: Dr. K. P. Chellamani, Mr. R. S. Vignesh Balaji and Mr. J. Sathish

Summary

The primary function of wound dressings is to protect the wounded site from contamination and further injuries.The wound dressings that adhere to the wound have a considerable influence on the way and time of wound healing and also upon the psyche and general feeling of patients.

SITRA has attempted to develop wound dressings using spunlace nonwoven fabrics. SITRA has selected 100% polyester spunlace fabrics for wound contact layer and back layer of the wound dressings. 100% bamboo spunlace was used as an absorbing layer (between wound contact layer and back layer) in the dressing. Original bamboo fibres (bamboo fibres extracted through mechanical means) have strong anti-bacterial and germicidal effect and hence, they are ideally suitable for making wound dressings. The bamboo fibres are also eco-friendly and bio-degradable.

Infected wounds tend to generate a large amount of exudate and also emit unpleasant odor. The wounds that emit repulsive odour affect the social interaction of patients thereby causing psychological problems such as depression. In order to avoid this, deodorizing wound dressings are preferred. Activated carbon is known to be efficient in adsorbing odorous / volatile micro-organisms from the wounds. Hence, one layer of the activated carbon (between back layer and absorbing layer) is also included in the construction of wound dressing made at SITRA.

Major accomplishments

  • SITRA has developed Spunlace Nonwoven Wound Dressings (SSWD) and their performance was compared with that of the commercially available wound dressings (CWD).
  • The tensile strength and elongation of the SSWD are higher than that of the CWD by 35% and 1.36% (absolute values) respectively.
  • The SSWD with a single absorbing layer has 8% higher air permeability value than that of the CWD.
  • Water vapour transmission of the SSWD is much higher as compared to the CWD and water sorption ability is also better for the SSWD.¬†
  • The SSWD exhibits higher wicking as compared to the CWD to the tune of 15% to 45%. It also exhibits excellent antibacterial activity against both gram positive and gram negative bacteria.
  • The SSWD has better odor absorbing capacity from the wounds as compared to the CWD. The extent of wound healing provided by the SSWD is also better.

Research Reports/Publications: Available at SITRA