Source: China Polypropylene Net - Website of China Fiber Net Author: amy69 Date: April 27, 2009 (31) Colored Spot Appearance: The fabric surface shows a large area without color pollution in a specific shape. Causes: 1. Contamination occurs when the fabric is wet and comes into contact with dyed fabrics of different colors, especially if there's a significant color difference. 2. Improper cleaning of machinery during processing or handling. (32) Foam Pollution (Scum Spot) Appearance: Foam residues are attached to the fabric surface, forming large patches or thick strips that appear slightly white after drying. Causes: 1. Excessive foam in the dyeing solution due to improper use of dispersants or additives. 2. High foam levels in reducing solutions, particularly after vat dyeing. 3. Impurities in phenolic coloring liquids that cannot be diazotized may lead to scum formation. (33) Tarring Strining Appearance: During dyeing, dyes clump together, causing dark stripes or short stains on the fabric. Causes: 1. Poor solubility of dyes or high water hardness. 2. Incompatible combinations of dyes and additives, or incorrect timing of addition. (34) Drum Contamination Appearance: Small, spaced contaminants appear on the fabric surface due to unclean cylindrical devices. Causes: 1. Oil stains on cloth guide rollers. 2. Tar-like residue on pressure rollers or loose fibers from the fabric. 3. Sticky oil and dirt on dried cylinders. (35) Chemical Staining Appearance: Discoloration, staining, or deterioration of the fabric surface. Cause: Chemicals not intended for the fabric have infiltrated it. (36) Dyeing Stop Mark Appearance: A 2-10 cm wide mark appears along the weft direction, with darker or lighter color and a watermark-like shape. Causes: Sudden machine stoppage during operation causes dye or reducing liquid to be pressed between rollers. (37) Stain After Packaging Appearance: Dark spots appear on the fabric surface after opening sealed packages. Causes: Condensation inside the package causes dyes or chemicals to move, resulting in spots. (38) Blurred Pattern Appearance Appearance: Printed patterns appear fuzzy due to unclear lines. Causes: Poor engraving of printing cylinders or insufficient scraper pressure. (39) Out-of-Print Appearance Appearance: Multi-color prints are misaligned, leading to deviations or full-face printing. Cause: Incorrect alignment of printing plates during multi-color printing. (40) Out-of-Paste Appearance Appearance: Part or all of the design is missing from the printed fabric. Causes: 1. Printing paste runs out or supply system fails. 2. Pulp pump malfunction in the printing machine. (41) Printing Breaks Appearance: Thin lines in the pattern are interrupted. Causes: 1. Insufficient depth of engraved printing cylinders. 2. High viscosity of the printing paste. (42) Printed Creases Appearance: No pattern is printed on areas where the fabric creases or overlaps. Cause: Fabric creases during printing prevent proper pattern application. (43) Plug Version Appearance Appearance: Small dot-shaped patterns are missing or appear as dots. Causes: Sticky masses in the printing paste block the cylinder. (44) Cross-Color Appearance Appearance: Printed patterns are blurred, with overlapping colors. Causes: 1. Low viscosity of printing paste. 2. Overlapping of two-color pastes. (45) Printing Paste Cylinder Pollution Appearance: White background fabrics show small amounts of contamination. Causes: 1. Poor mirror finish on the printing roller. 2. Scraper not in good contact or not sharpened. (46) Scraper Stain Appearance Appearance: A single-colored streak appears along the warp or length of the fabric. Causes: Agglomerations in the printing paste press against the scraper. (47) Printing Thread Appearance Appearance: Thin lines appear on non-printed areas of the fabric. Causes: Poor engraving or damage to the printing cylinder edge. (48) Printing Trails Appearance: Dots on the fabric leave dragging marks along the length. Causes: Heavy paste, uneven tension, or buildup on the scraper. (49) Printing Jump Knife Appearance: Wavy color changes along the fabric length. Cause: Improper blade installation or pressure. (50) Bad Plate Jointing Appearance: Continuous patterns are not aligned at plate joints. Causes: Poor plate making or inaccurate spacing. (51) Base Fabric Seam Pollution Appearance: Blurry pattern traces appear across the fabric width. Causes: Seams of the base fabric absorb more moisture, causing diffusion of printed paste. (52) Printing Stop Mark Appearance: A 5–15 cm wide color blend appears across the fabric width. Causes: Printing machine stops, and the roller remains pressed on the fabric. (53) Water Rolling Marks Appearance: Lighter colored spots appear on dyed or printed fabrics. Causes: Water droplets combine with dyes, changing color permanently. (54) Hair Color Spots Appearance: Light, irregular flaky spots appear after hair color treatment. Causes: 1. Improper ratio of dye base and color liquid. 2. High drying temperature. 3. Incomplete dissolution of reducing agents. 4. Air trapped in steam box. 5. Uneven temperature in steam box. 6. Incomplete oxidation of dye. 7. Exposure to sunlight before hair color. (55) Resin Spots Appearance: Shiny, hard resin spots appear on the fabric surface. Causes: Resin does not dissolve evenly, sticking to the fabric. (56) Surface Resin Appearance: Resin floats on the fabric surface, leaving scratches. Cause: Excessive resin absorption and high drying temperature. (57) Wool Balls Appearance: Wool balls appear on the fabric surface, common in wool or polyester blends. Causes: Excessive hairiness before resin processing or lack of anti-pilling agents. (58) Split Yarn Appearance: One row of loops in weft-knitted fabric becomes flat. Cause: Incorrect feeding direction during setting or resin processing. (59) Shiny Surface Appearance: Fabric surface is too flat and shiny, common in synthetic knits. Cause: Excessive tension during resin processing. (60) Uneven Cloth Appearance: Fabric has unevenness when laid flat, common in weft-woven fabrics. Causes: Poor molding or resin processing causing uneven shrinkage. (61) Poor Elasticity Appearance: Knitted fabric doesn’t return to original shape after stretching. Causes: Poor crimp fastness or excessive heat during processing. (62) Paper-Like Texture Appearance: Fabric feels stiff and paper-like. Cause: Low shrinkage rate of chemical fibers during processing. 4. Defects Related to Oils and Handling (1) Oil Warp (2) Oil Weft (3) Oil Yarn (4) Oil Stains (5) Water Stains (6) Friction Marks (Chafe Mark) (7) Holes (8) Creases (9) Uneven Hair (10) Hair Removal (11) Ripple (1) Oil Warp: A section of warp yarn is contaminated with grease. Causes: Mechanical lubricant used during weaving. (2) Oil Weft: A section of weft yarn is contaminated with grease. Causes: Lubricant used during weaving. (3) Oil Yarn: A section of yarn in a knitted fabric is oily. Cause: Contaminated during winding or transport. (4) Oil Stains: Embryo or finished cloth has oil stains. Causes: Splashing of lubricating oil during production. (5) Water Stains: Fabric has water marks after being immersed. Causes: Water exposure or washing. (6) Chafe Mark: Gloss, color, or structure differences caused by friction. Causes: Friction during processing or machine slippage. (7) Holes: Fabric has holes from cut warp or weft yarns. Cause: Sharp objects during transport. (8) Creases: Fabric has fold marks that disappear under tension. Causes: Improper folding or pressure during processing. (9) Uneven Hair: Tufts or loops are uneven in raised fabrics. Causes: Uneven tension or improper shearing. (10) Hair Removal: Tufts fall off easily. Cause: Poor fabric structure or low clamping force. (11) Ripple: Fabric has wavy texture due to uneven yarn density. Causes: Improper dyeing or machine settings.
Hyauronic Acid Pen,Laser Hair Remove Machine,Dr Pen,Tattoo Remover Carbon Peeling Machine,Face Massager Face Neck Beauty Machine
WEIYE TECHNOLOGY CO.,LTD , https://www.radiassero.com