Industrial two-layer fabric

An industrial two-layer fabric comprising:

• an upper side fabric comprising upper side warps and upper side wefts that are woven with the upper side warps;
• and
• a lower side fabric comprising lower side warps and lower side wefts that are woven with the lower side warps;
• the upper side fabric and the lower side fabric are interwoven with a warp binding yarn or a weft binding yarn and thereby form an inner space between the upper side fabric and the lower side fabric;
• wherein:
• the upper side wefts include at least one of a primary upper side weft and a secondary upper side weft,
• a number of the upper side warps passing under the primary upper side weft is larger than a number of the upper side warps passing on the primary upper side weft so that the primary upper side weft forms a longer crimp on an upper surface of the upper side fabric than a crimp in the inner space,
• a number of the upper side warps passing on the secondary upper side weft is larger than a number of the upper side warps passing under the secondary upper side weft so that the secondary upper side weft forms a longer crimp in the inner space than a crimp on the upper surface;
• and
• the lower side wefts include a primary lower side weft and a secondary lower side weft,
• a number of the lower side warps passing over the primary lower side weft is larger than a number of the lower side warps passing under the secondary lower side weft so that the primary lower side weft forms a long crimp on a lower surface of the lower side fabric than a crimp in the inner space,
• a number of the lower side warps passing under the secondary lower side weft is larger than a number of the lower side warps passing over the secondary lower side weft so that the secondary lower side weft forms a longer crimp in the inner space than a crimp on the lower surface.