Method and apparatus for pre-treatment of non continuous textiles
A method and apparatus for treating textiles and textile materials prior to dyeing said textiles or textile materials includes the steps of loading a textile substrate into a vessel and saturating the textile substrate therein with pre-treatment chemicals are described. The impregnated textile substrate and excess process solution are transferred into a hydraulic press having a flexible bladder. The press squeezes the textile substrate uniformly to remove the excess solution which is captured and recycled for reuse. The squeezed, impregnated textile substrate is stored in airtight containers to allow dyesite formation. The textile substrate is then neutralized, washed, and dried and as thus pre-treated can be dyed in an ecologically sustainable, energy-efficient, and economical process. The method and apparatus ensure uniform moisture pick-up and distribution of the chemical(s) throughout the textile substrate.
1. A method of pre-treating textiles in advance of a dyeing process, comprising the steps of:
(a) loading a textile substrate into a vessel;
(b) saturating the textile substrate with pre-treatment chemicals in the vessel, wherein the pre-treatment chemicals include an alkaline catalyst;
(c) unloading the pre-treated textile substrate from the vessel;
(d) loading the textile substrate unloaded in step c into a mould included in a hydraulic press;
(e) extracting the pre-treatment chemicals from the textile substrate in the mould;
(f) unloading the textile substrate from the mould via a porous conveyer belt integrated into the hydraulic press; and
(g) recirculating the extracted pre-treatment chemicals from the hydraulic press back to the vessel.
2. A method according to claim 1 wherein the textile substrate is a non-continuous textile made of cellulosic material; and
the textile substrate unloaded in step (f) is stored in the absence of air for a period to allow the pre-treatment chemicals to fully develop the desired dye sites on the cellulosic molecules of the textile material.
3. A method according to claim 2 wherein the textile substrate stored for said period is loaded into a neutralizer/wash module and neutralized, washed, and then dried.
4. A method according to claim 1 wherein the textile substrate is made of fibers or yarn.
5. A method according to claim 1 wherein the pre-treatment chemicals is extracted from the textile substrate until the textile substrate reaches a predetermined moisture content level.
6. A method according to claim 5 wherein the predetermined moisture content level is between 65% and 140% by weight.
7. A method according to claim 1 , additionally comprising the step of:
(h) curing the textile substrate in the absence of air by applying heat.
8. A method according to claim 7 wherein the curing occurs in a vacuum or in an atmosphere of inert gas.
9. A method according to claim 1 wherein the force from a ram included in the hydraulic press is evenly applied across the entire textile substrate, the ram is configured to distribute the pre-treatment chemicals evenly throughout the textile substrate.