5 Common Uses of Polyurethane (PU) Sheets

PU sheets—polyurethane sheets—are used in wig making to create smooth, skin-like areas where hair can be attached or where adhesive can be applied. They are commonly called thin skin, poly skin, or PU material.

Common uses of PU sheets

1. Creating realistic scalp or parting areas A thin, semi-transparent PU sheet can be used at the crown, part, or hairline to imitate the appearance of scalp. Hair is typically injected, punched, or ventilated into the material. (Product Reference: Poly Skin Sheet)

2. Making adhesive tabs and perimeter strips PU strips are often sewn, bonded, or incorporated around the perimeter of a wig or topper. Wig tape and liquid adhesive stick more securely to PU than to lace or mesh. (Product Reference:Tape Skin Pad and TPU-340)

3. Reinforcing the wig foundation PU may be added around the temples, nape, ear tabs, or other high-stress areas. This strengthens the base and helps prevent lace or mesh from stretching or tearing.

4. Creating skin-top wigs and toppers

For a skin-top design, hair is inserted through the PU so the roots appear to emerge directly from the scalp. The underside may be sealed to secure the hair. (Product Reference: Silk Base Foundation)

5. Making stationary faux parts

A thicker PU sheet can be used to create a fixed part that stays in one position. This is helpful when the hairstyle does not need free parting. (Product Reference: PU Sheet 0.8mm)

Hair-attachment methods

Depending on the PU thickness and type, hair may be attached by:

• Hair injection: Hair is mechanically inserted and secured inside the PU.(Product Reference: (Slide and Punch Needle)

  
  

• Hand punching: Small groups of hair are pushed through the material with a specialized injection needle. (Product Reference: F-100 needle)

  
  

• Ventilation: Hair is hand-knotted through suitable thin PU or reinforced openings.(Product Reference: German or Asian Ventilating Needles)

  
  

• Embedding or sealing: Hair is positioned in liquid polyurethane and sealed between layers. (Product Reference: Wig Poly or Poly340)

  
  

PU thickness matters

• Ultra-thin PU: Offers the most realistic appearance but is delicate and may have a shorter lifespan.

  
  

  Medium PU: Provides a balance of realism, flexibility, and durability.

  
  

• Thicker PU: Works well for adhesive tabs, reinforced edges, and fixed faux parts, but may look less natural in exposed areas.

  
  

For example, a 0.06 mm skin sheet may be suitable for thin scalp-effect areas, glue tabs, hand punching, or hair injection. A 0.8 mm PU sheet is generally sturdier and may work better for stationary faux parts or areas where the hair will be injected.

Remember that PU is less breathable than lace, so many wig makers combine it with lace, monofilament, or mesh to provide both a realistic appearance and better ventilation. (Product Reference: Smooth Mono or Swiss Lace)

How have you used polyurethane sheets for your wig making project? We'd love to hear from you!

If you have any questions, do not hesitate to contact us!

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