Unmodified polypropylene fibre has been used for carpets (more particularly needlefelt
floor coverings) for many years, but because it cannot easily be dyed or printed mass coloration methods have been used. This led to the development of modified
polypropylene fibres which could be coloured using disperse, acid or special chelating
dyes. For carpet printing and space dyeing a nickel-modified polypropylene has been
used.
This can be printed with special disperse dyes which contain chelating groups that form a complex with the nickel contained in the fibre. This fibre type is still used for space dyeing. Forms of polypropylene that can be dyed with acid dyes have recently been introduced for printing, but problems still arise in achieving good levels of both light fastness and wet fastness.
Despite these difficulties polypropylene is taking a greater share of the carpet fibre market (Table 4.10) and at the moment most of the fibre used is either masspigmented or undyed (being used as an intermingled yarn or fibre blend together with nylon, which can be dyed by conventional methods). The main reasons for the gain in market share of this fibre are its low cost and good all-round performance, together with the fact that larger firms can install relatively cheap fibre-spinning plant and produce the required carpet yarns in-house.
Polypropylene |
This can be printed with special disperse dyes which contain chelating groups that form a complex with the nickel contained in the fibre. This fibre type is still used for space dyeing. Forms of polypropylene that can be dyed with acid dyes have recently been introduced for printing, but problems still arise in achieving good levels of both light fastness and wet fastness.
Despite these difficulties polypropylene is taking a greater share of the carpet fibre market (Table 4.10) and at the moment most of the fibre used is either masspigmented or undyed (being used as an intermingled yarn or fibre blend together with nylon, which can be dyed by conventional methods). The main reasons for the gain in market share of this fibre are its low cost and good all-round performance, together with the fact that larger firms can install relatively cheap fibre-spinning plant and produce the required carpet yarns in-house.
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