Flame retardant fabric color difference

1. The dyeing products from different shades of colour and lustre, color has a difference.

Color: (1) the same batch of flame retardant fabric with batch of products. A color number between product box and the box, and parts, between package and package, there is flame retardant fabric color difference between horse and horse.

(2) and the flame retardant fabric color difference: the horse and horse before and after the product of the fact in flame retardant fabric color or have flame retardant fabric color or both the flame retardant fabric color difference. Flame retardant fabric color is one of the common fault and multiple fault dyeing factory, seriously affect the dyeing quality of the finished product.

2. The reason

Fiber of of all kinds of fabric, dyed with different kinds of dyes and process equipment, and have different requirements and characteristics of the dyeing processing, and the causes of fault and the performance is different. Flame retardant fabric color difference on the appearance of performance varied, but investigate its reason, mainly has the following kinds.

(1) : the uneven distribution of dye on the fabric with the first before dye fixation, if uneven distribution in each part of the fabric, after fixation will generate flame retardant fabric color difference. The main cause of this phenomenon is:

1.. Fabric: due to the different fiber performance or pretreatment, boiling, bleaching, silk back not divide evenly, make dye permeability caused by uneven tire before the dye absorption degree of difference.

2.. Suction fluid factors: because of mechanical structure or improper operation, make each part of the fabric with liquid rate, resulting in flame retardant fabric color difference. Roll pressure not divide evenly, add dyestuff is not well and can make fabric absorb dye unevenness.

3.. Preliminary drying factors: a preliminary drying after the pad dyeing liquid, due to the drying rate and degree of inconsistency, cause varying degrees of dye migration, the dyes on the fabric distribution is uneven.

(2) the degree of the dye fixation on the fabric is different: although the dye on the fabric with the first distribution is uniform, but in the process of fixation. Such as the improper control of conditions (such as temperature, time, concentration of dyestuff, etc.), make certain parts of the dyes on the fabric has not been fully solid color, has been removed. In the post-processing soaping to produce flame retardant fabric color difference. Disperse dye, for example, thermosol temperature on both sides or inconsistent, VAT dye partial oxidation reduction or inadequate, such as reactive dyes adverse steaming conditions can cause the fabric before and after around or have a flame retardant fabric color difference.

(3) dye color change: the difference is not caused by uneven distribution of dyes on the fabric. But for some reason cause part of dye on the fabric color change, generally has the following several reasons:

1.. Before dyeing factors: whiteness of semi-product uneven or pH have bigger difference, often cause color difference after dyeing.

2.. Dyeing factors: such as disperse dye thermosol temperature is too high, make some dye color shade walls of dark; The excessive reduction of VAT dye, also can make color difference.

3.. After dyeing factors: after finishing process. High temperature, such as resin finishing, stentering and different PH value on fabric, colored light have different degree of change will cause dye.

Uv protection fabric

In recent years, due to containing halogen compounds such as freon a large amount of emissions, stranded over the earth, is broken down by ultraviolet (uv) formation of active chlorine and ozone chain chemical reactions occur, ruined the ozone in the air is hollow, the ultraviolet radiation to the ground, ultraviolet rays will cause harm to people's skin. According to scientists, predicts that by 2050 the stratosphere ozone would be reduced about 20%, then uv will bring greater harm to human health. As a result, people have developed which has the function of u.v fabric and textiles.

The principle of textile ultraviolet resistance

uv protection fabric, the mechanism has two kinds: absorption and reflection. Ultraviolet screening agent have accordingly absorption agent and reflection agent (or scattering jing) two kinds. Absorption agent and reflection agent can be used alone, also can be a mixture of both.

Uv reflection agent mainly using the reflection and scattering effect of inorganic particles, can have the effect of uv light through. Uv absorber mainly use organic material to absorb ultraviolet light, and energy transformation, in the form of heat or harmless low radiation will release or consume energy. Uv protection textiles with appropriate method processing, whatever the fiber material, can achieve good uv protection effect, and the thickness of the fabric, color and so on factors affect the performance of uv is no longer important.