Process and apparatus for the space dyeing of hanks of fibre or yarn
AssigneeBTR Operations NZ Limited
InventorsIan E. Watson, Geoffrey Hodds
Life of this patent
Estimating the term…
Abstract
A process for the space dyeing of yarn (particularly yarn containing at least 10% of natural fibres) suitable for use in carpets, the manufacture of textiles and for hand knitting, involves a series of nozzles across the path of a conveyor carrying transverse hanks of yarn, applying sequential bands of colored dye along the transverse length of the yarn, passing the yarn through a first squeeze head to cause the dye formulation to spread on and penetrate into the yarn, fixing the dye, and passing the yarn between pressure rolls to remove sufficient of the moisture quickly so that no subsequent cross-staining of the yarn occurs. Successive pairs of pressure rolls are preferably used.
Claims7
In a process for the space dyeing of hanks of fibre or yarn containing at least 10% of a natural fibre, which comprises passing said hanks of fibre or yarn through a means for causing dye formulations to be applied in sequential bands of color along the length of said hanks of fibre or yarn, passing said hanks of fibre or yarn through a means whereby said dye formulations are caused to spread on and penetrate into said fibre or yarn, fixing said dye formulations to said fibre or yarn, rinsing said hanks of fibre or yarn, and drying said hanks of fibre or yarn;
- the improvement comprising passing said hanks of fibre or yarn quickly through pressure means after said rinsing, storing said hanks of fibre or yarn, and then carrying out final drying of the hanks of fibre or yarn, the passage of said hanks of fibre or yarn through said pressure means removing moisture so quickly that no subsequent cross-staining of the fibre or yarn occurs during said storing prior to said final drying.
Apparatus for the space dyeing of hanks of fibre or yarn containing at least 10% of a natural fibre, which comprises means for applying dye formulations in sequential bands of color along the length of said hanks of fibre or yarn, means for causing said dye formulations to spread on and penetrate into said fibre or yarn, means for fixing said dye formulation to said fibre or yarn and pressure means capable of removing moisture so quickly that no subsequent cross-staining of the fibre or yarn occurs.
Apparatus for the space dyeing of hanks of fibre or yarn containing at least 10% of a natural fibre, which comprises means passing said hanks of fibre or yarn through a means for causing dye formulations to be applied in sequential bands of color along the length of said hanks of fibre or yarn, means for passing said hanks of fibre or yarn through a means whereby said dye formulations are caused to spread on and penetrate into said fibre or yarn, means for fixing said dye formulations to said fibre or yarn, means for rinsing said hanks of fibre or yarn, and means for drying said hanks of fibre or yarn;
- the improvement comprising means for passing said hanks of fibre or yarn quickly through pressure means after said rinsing, means for storing said hanks of fibre or yarn, and means for then carrying out final drying of the hanks of fibre or yarn, the means for passing said hanks of fibre or yarn through said pressure means being adapted to remove moisture so quickly that no subsequent cross-staining of the fibre or yarn occurs during said storing prior to said final drying.
Dependencies are inferred from the claim text.