Textiles: fiber preparation – Working – Fluid or special treatment
Patent
1996-11-07
1998-05-19
Crowder, C. D.
Textiles: fiber preparation
Working
Fluid or special treatment
25055908, 25055919, 2505594, G01N 2100, D01G 3100
Patent
active
057522944
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a system for detection and removal of cotton stickiness and detection of other qualities in real time.
Said system has an electro-optic and computerized unit capable of determining the amount of lint sticking to a roller after the carding process.
The present invention relates also to a method for detection of stickiness severity, its adhesiveness, and number of neps and other lint qualities such as length, width, color, and trash seed coat fragments--by the use of said system.
The present invention relates also to a method for separation and removal of sticky deposits which are present in cotton in the course of the ginning process.
BACKGROUND OF THE INVENTION
Sticky trash neps and seed coat fragments (e.g. particles of braked seeds) cotton are serious problems in the cotton industry, as they tend to clog up the spinning machines during its processing at the spinning mills. As a result, the prices of sticky cotton are reduced causing severe losses to the farmer. In some countries (the so called "sticky countries"), the problem is so widespread that cotton prices are reduced by 30-50%.
The main damage caused by stickiness occurs in cotton mills, during the industrial processing of the yarns, where the sticky particles within the raw material clog the rolling parts of the machines, such as pickers, cards or rollers, and as a result tear the cotton yarns. Cotton heavily contaminated by sticky particles primarily tends to clog the pickers, whereas less contaminated cotton tends to clog the cards and especially the spinning rollers. Cotton heavily contaminated by stickiness, neps and seed coat fragments tend to decrease yarn quality and uniformity and increase waste of cotton.
Other qualities such as length, microneer, total amount of trash, lint maturity, percent of lint above 1", are checked by a traditional technique, but needs dramatic improvement, as the new spinning machines are super high speed operated and need very clean and uniform raw cotton. For this purpose, the industry needs a new detecting system which will reliably check, in real time, the traditional qualities.
Several causes have been proposed to explain cotton stickiness, neps and seed coat fragments: insects. ginning process. of the seeds and incorrectly calibrated gining machines.
A partial solution to the stickiness problem would be improving the pest management against honeydew secreting insects. This is done by pest control, as managed by the farmer. This is in the farmer's financial interest to prevent biologically caused stickiness, especially if the percentage of the contaminated bales is low. Today, the whole batch of bales, not only those contaminate, is suspected of stickiness and are reduced in price.
In an attempt to develop a standardization system for sticky cotton, the international market adopted a calorimetric method for determining sugar tests as an indicator for stickiness. This approach was adopted worldwide after several researchers found some correlation between the amount of sugar content in the lint extraction and the degree of stickiness at the mill.
However, the problem remains the low correlation between the stickiness detection and the stickiness at the mill, for it tends to vary between countries and between seasons. In addition, this approach can not provide a constant standard for stickiness, as the small number of bales which are tested are not statistically reliable.
Another approach was to develop mechanical stickiness testers, for detection of stickiness while cotton is run through a similar card process. Three kinds of testers were developed; one simulated the process of the card (hereinafter called "minicard"), the other simulated the process following the pickers, and the third "finds" the honeydew particles after a heating period (hereinafter called "thermodetector"). The advantage of these machines is that they test some kind of stickiness and not indirect detection of sugar content in the cotton. The disadvantage, however, of these three se
REFERENCES:
patent: 4969234 (1990-11-01), Waeber et al.
patent: 5003670 (1991-04-01), Waeber et al.
patent: 5130559 (1992-07-01), Leifeld
Crowder C. D.
Worrell Jr. Larry D.
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