Textile Defects Lecture
1)Gasoline Spot
Appearance: mostly occurs in E/R blended chemical fiber fabrics The fabric has oil drop-shaped spots after coloring, which are slightly darker than normal areas. When viewed with a magnifying glass, the tips of the piles in the dark-colored areas of the fabric appear to be tiny beads, and there are more piles than the normal areas.
Cause: This is due to uneven singeing , in the heavily stained areas, the plush was not fully burned out and became a melted mass at the tip, which has strong color absorption, so the color is thicker.
(2) Bumang (Fuzz, Nap)
Appearance: Fabric after coloring and finishing, cloth There is still a slight plush on the surface, which is different from the color of the cloth grain.
Cause: 1). Insufficient singeing, The hairiness on the cloth surface has not been completely burned away. 2). When using a liquid flow coloring machine to color, the jet from the nozzle is too strong.
(3) Inperfect Penetration
Of Dye)
Appearance: After coloring, the cloth surface will appear dark and light. Colorful cloud shape.
Cause: 1). Insufficient desizing and seminal plasma Sufficient, or wax and other substances removed after treatment, and then attached to the fabric. 2). During bath dyeing, the bath ratio is too small and the heating rate is too fast, causing the coloring liquid to gel.
(4) Refined spots
Appearance: During the scouring process, scouring the fallen fabric The non-fibrous material is combined with the scouring agent, mixed with the fluff dropped from the fabric, and adheres to the surface of the fabric. There are irregular flaky yellow marks on the cloth surface. If you scratch it lightly with your fingernail, short lint and debris will fall off.
Cause: 1). The scouring agent is easy to dissolve at normal temperature Condensation. 2). When refining in a refining kettle, the water washing is not sufficient or the washing temperature is low. 3). In continuous refining, there are sediments accumulated in the refining chamber, or there is too much foam in the refining tank and the roller surface is unclean.
(5)�t-indent: 24pt; line-height: 18.9pt; outline: none; resize: none; background: white;”>(17)Instrinsic Luster
Streak)
Appearance: The surface of the non-raised colored fabric. When illuminated directly by the finished line, the color will appear as striped shades or differences in light and shade.
Cause: This is one of the chemical fibers used for dyeing fabrics Physical property problems due to the reflectivity of the fibers in the fabric
, absorbability, permeability, etc., resulting in differences in finish, transparency, whiteness, etc. in viewing. For example, the additives, degree of crystallization, degree of alignment, amorphous state, etc. in chemical fibers will all affect the integrity of the fiber itself.
(18)Fabric Configuration
Streak)
Appearance: non-plain weave colored fabric, according to Due to changes in tissue, the color of the cloth surface may vary from dark to light or light to dark.
Cause: Due to the structure of the fabric, the fabric The distribution of intersection points and the arrangement relationship between warp and weft yarns are different, resulting in different reflectivity and permeability of the fabric to the completed threads.
(19)Spacing Streak
Appearance: in the warp or longitudinal direction of the colored fabric , the difference in color depth in a straight strip.
Cause: The warp yarns of the fabric move during coloring , making the arrangement density of yarns uneven, and the gap between adjacent yarns
The gaps are large and small, creating differences, resulting in visual shallowness and depth.
(20)Carrier Spot
Appearance: polyester fabric colored cloth surface, with Drop-shaped spots of intense dye.
Cause: 1). Normal pressure bath-dyed polyester fabric When the dye is absorbed, spots are formed on the cloth surface due to poor dispersion of the dye guide. 2). The dye-conducting agent that volatilizes during normal pressure dyeing condenses on the top of the machine and drops onto the dyed object.
(21) Warp Stripe, Yarn Texture Streak)
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