FYI Tester Instrument

The  dyeing equipment  employed under high temperatures and high pressure is known as an “ HTHP  dyeing machine.” There are some risks associated with using the HTHP dyeing machine. The safety concerns that must be taken into account when using it are briefly described below. Opening and closing the cover The steam valve must first be closed to stop the heat source once any high-temperature, high-pressure dying is complete. The pressure lowering valve must then be opened, and the lid can only be released when the pressure drop below 0 MPa and temperature drop below 85℃ inside the dyeing machine . Under these circumstances, if the lid still won’t open, it’s best to check the instrument first to make sure it won’t break down and fail to accurately display the residual pressure. To avoid hazard, don’t forcefully open the cover. Additionally, even though the fabric feeding machine is operating normally, if the temperature inside the machine has not yet reached 95 °C, do not c...

We have discussed the technical characteristics, classification, and development of domestic jigger dyeing machines  before . Here are eight foreign jigger dyeing machines and information on how to choose the right one for you. Foreign jigger dyeing machine 1. OTTO-PRICKEN from Germany ​ OTTO-PRICKEN normal temperature jigger dyeing machine The machine has a straightforward dyeing tank layout. A specially created spreading device minimizes the number of lanes, which cuts down on the amount of time and water used. Additionally, the jigger’s simple and unique tank design gives it a very flexible production capacity, allowing it to meet the needs of both small and large orders on the same machine. The main determining parameters for dyeing are temperature, tension, speed, time, water level, dosage, and liquor ratio (1:2). In order to guarantee the reproducibility of dyeing outcomes, the OTTO-PRICKEN jigger can adjust and monitor these elements in real time. Equipment performance Drivi...

According to the dyeing method, dyeing machines can be categorized into three groups: dip dyeing machines, jigger dyeing machines, and pad dyeing machines. Additionally, it can be divided into categories based on whether the dyeing process is continuous or intermittent and if the dyeing machine operates at atmospheric pressure or high pressure. ​ The jigger dyeing machine is the focus of this article among the several forms of dyeing equipment. It primarily introduces classification and development, technical features of domestic and foreign brands, and the best options for jigger dyeing machine. ​Definition, classification and development of jigger dyeing machine Definition and history ​ Jigger dyeing machine was initially constructed out of wood or iron as an open-width dyeing tool. It significantly increased fabric dyeing efficiency over the manual workshop-style operation used at the time and decreased labor intensity and dyeing time. In the late 1970s, the machine  constructed...

The five  objective outside factors  that affect the reproducibility of yarn dyeing have been listed before. The seven additional human-generated subjective elements and solutions are discussed below. Subjective elements of yarn dyeing reproducibility issues 1、Winding quality The apparent color depth of the cheese yarn’s dip-dyed color is greatly influenced by the weight ratio of the dye to the material being dyed. In most cases, package dyeing and loading just counts the quantity of bobbins; additional weighing is not necessary. The weight of the loaded yarn is thus determined by the weight of the winding. Therefore, the winding must weigh 100% of all loose packages. 2、Pretreatment ​ The degree of impurity removal during pretreatment, the level of gross efficiency, the degree of whiteness, the pH after washing, and the hydrogen peroxide depuration following bleaching will all have an impact on the dye uptake rate and shade. 3、Selection of dyes Reactive dyes, vat dyes, direct ...

Distinct batches always have a different hue when the same process prescription, process dyeing ingredients, and other variables are used. Poor color reproducibility of colored yarn is primarily due to the inconsistency of dyes used in various dyeing batches. All process variables must be under control for yarn dyeing to be reproducible. This article describes 12 common factors that affect the reproducibility of yarn dyeing. It is very beneficial for textile enterprises or dyeing factories to control product quality. ​What is yarn dyeing reproducibility In intermittent dyeing, the same colored object (yarn) is dyed with the same dyeing ingredient, recipe, and technique, however there is a phenomena of color variation between dyed products in different dyeing batches. This is referred to as poor reproducibility (ie cylinder difference). Causes of poor yarn dyeing repeatabilit The reason for poor color reproducibility is complex. Roughly speaking, yarn, dyeing and chemical materials, pro...

  A cone dyeing machine is also called a package dyeing machine, a  bobbin yarn dyeing machine  or a cheese dyeing machine. When we introduced  package dyeing  before, we mentioned that there was a major flaw when dyeing with a cone dyeing machine. That is, the color difference between the inside and outside of the cheese is relatively large. In this article, we will analyze the causes and prevention methods of the color difference between the inner and outer layers of the cheese yarn. Manifestations of color difference There are two cases of color difference of cone dyeing. The middle yarn and inner yarn have different shades of color. The different shades of color between inner yarn and outer yarn Discrimination method Generally speaking, there are two ways to judge the color difference of the cone dyeing: Visually assess the degree of color difference between the inner and outer layers. Use a small knitting machine to knit the yarn into tubular fabric. That i...

​ HTHP dyeing machine is the abbreviation of high temperature and high pressure dyeing machine. This type of dyeing machine is generally used to dye chemical fiber grey fabrics and yarn products. And it has the characteristics of high color fastness and uniform dyeing. However, the dyeing process requires high temperature and high pressure steam, and the dyeing machine is subjected to high temperature and high pressure, which is dangerous. Cotton fabrics are generally dyed at normal temperature and pressure. Different types of HTHP dyeing machine HTHP beam dyeing machine ​The knitted fabric is wound on a hollow reel warp beam with small holes on the surface, sent into a horizontal cylindrical stainless steel shell, sealed and pressure-dyed, and then processed. The dye liquor is transported by a centrifugal pump and circulates from the inside to the outside or from the outside to the inside to the fabric layer through the warp beam. This type of dyeing machine may create color differenc...