Back to results
US 3,998,585 AGranted
Package dyeing method
AssigneesKuraray Co., Ltd., Nippon Sanmo Sensyoku Co., Ltd.
InventorsShinji Tomibe, Michio Arai, Kiyoshi Higashi
Life of this patent
Estimating the term…
Abstract
A batchwise packaging dyeing method is disclosed wherein a loose stock of fiber is charged into a basket carrier of a high temperature, high pressure package dyeing machine. The loose stock of fiber is charged in such a manner that the change rate (a) is 10% or less and is defined as the difference between the open space value before dyeing (E.sub.1) of the fiber layer and the open space value after dyeing (E.sub.2) of the fiber layer.
Claims16
A package dyeing method which comprises:
- a. charging a loose stock of fiber into a basket carrier of a high temperature, high pressure package dyeing machine,
- b. compressing said fiber to form a first fiber layer in such a manner that .epsilon..sub.1, defined as 1-.rho..sub.P1 /.rho. f where .rho..sub.P1 is equal to W/V.sub.1, is within the range of 0.47 and 0.85,
- c. circulating a dyeing liquid through said first layer,
- d. removing the excess dyeing liquid from said carrier to thereby obtain a second fiber layer having a value for .epsilon..sub.2, defined as 1-.rho..sub.P2 /.rho.f where .rho..sub.P2 is equal to w/v.sub.2, such that (a), defined as ##EQU3## has a value of 10% or less, e. washing and rinsing said second layer while in said basket carrier, and wherein .epsilon..sub.1 is the open space value of said first layer, .epsilon..sub.2 is the open space value of said second layer, .rho..sub.p1 is the apparent loading density of said first layer, .rho..sub.P2 is the apparent density of said second layer, .rho.f is the actual density of said fiber, w is the weight of said fiber, v.sub.1 is the apparent volume of said first layer, and V.sub.2 is the apparent volume of said second layer.
1 more element
Dependencies are inferred from the claim text.