IV. Flowering V. knife line (white bar) 1 The dyeing material is not completely soluble, and impurities, knife lifting, and filter slurry are mixed during operation; 2 After lifting the knife is still in: This is because the viscosity of the paste is too large, sticking to the knife edge, should be used to increase the slurry or modified to the plasma hole, so that the slurry unimpeded! Six. Color difference Sportwear Fabric,Sportswear Fabric Nylon,Sportswear Fabric Spandex,Sport Wear Fabrics Textiles Shaoxing Moying Textitle Co.,Ltd , https://www.moyingtextile.com
One, not allowed to spend
1. Analysis of the cause The flower is not allowed to account for more than 40% of the printed silk fabric, mainly due to the two aspects of the process and the machine, followed by the operational problems of each process.
2. Process development (1) Printing process before reviewing drafts: For some flowering difficulties, overprinting may occur with the third color and the color-transmitting pattern. The anti-drainage process should be used. This is a kind of Effective solution.
(2) Arrangement of flower nets For flower nets that require flowers, high demands should not be placed too far, and it is better to print a small area pattern first, and then print a large area pattern to reduce the inaccurate flowers caused by fabric shrinkage. , In the actual production, according to the need to turn the net, rearrange.
(3) The plate-making process did not correctly analyze the characteristics of the pattern in the process of drawing the black-and-white film. However, the line that was used to borrow the line used the line, or the line was too large or too small. When printed, it was prone to misalignment, dew or whiteness. Overprinting, so in the drawing should pay attention to the analysis of the pattern structure characteristics, should be carefully considered the flower of the high demand, the rational use of borrowing, sub-line.
3. Operational Skills (1) Nickel net selection and net making The same pattern of circular net perimeter must be uniform.
The recirculation work must be serious.
Rotary nets have large heads that are difficult to distinguish when used. Should pay attention to the size of the diameter of the two round nets, when the head must be used to take a squeegee peace accounted for strict screening, can not be biased.
(1) Fabric preparation When the right and left sides and the middle pair of flowers are inconsistent or the left and right flowers are inconsistent, the reason is mostly due to the unevenness of the dryness of the grey fabric . The large area pattern is the front, most of which are caused by fabric shrinkage, and the fabric can be pre-shrinked. Solve to increase the stability of the fabric when printing.
(2) The use of patch glue is not uniform on the rubber blanket, and poor patching ability has a great influence on the printing.
If there is misalignment on one side or flashing on the flower, it is necessary to consider whether it will be invalid due to prolonged use of the patch glue, and replace or add new glue.
(3) Incoming and out of cloth tension In and out of the fabric tension is uneven, the fabric shrinks unevenly on the blanket, most of the left and right are not allowed to spend, too loose, too tight will affect: too loose → fabric running Slower than the speed of the network, the need to lower the flower; too tight, the cloth speed faster than the speed, the need to increase the flower. Adjust the tension according to the actual situation.
(4) In the production of pulp surface, the surface of the pulp is unstable, and the flashing of the flower will occur at a high or low level. If the pulp surface is too high or too low, it will affect the flowers in the border: the pulp surface is too high, the flower network is heavy, and the flower pattern is low. Flowers need to be raised; otherwise, they are lowered.
(5) Severe changes in pressure pressure on both sides or scraper steam leakage will cause left, right, and right sides of the blade pressure to be uneven; it will also cause difficulties in flowering. Pressing cars to increase, flowers are low, the need to increase the flower; pressure to reduce, the opposite is true.
(6) Operation specification: Before the drive, the flower device shall be reset according to regulations.
Two. Color
Traction pulp refers to the outline of some patterns of "long hair" or "hairiness." In actual production, there are forward drag, backward drag, front drag, and back drag.
1. Frontal pulping means that there is too much pulp deposited on the front side of the fabric. It does not penetrate into the interior of the fabric. It can reduce the amount of pulp to be fed, or it can be pressurized after the coloring of the flower nets. A light-free net can scratch the flowers. Causes the promotion of slurry penetration.
2. The backside slurry indicates that the slurry penetrates too much on the back side, generally reducing the pressure, thickening the color paste to reduce the amount of pulp on the back of the fabric, and also to slow down the speed so that the slurry can be dried in the drying room and reduce dragging. Chance.
3. Drag forwards and backwards to indicate that the tension of the cloth is not suitable: when the cloth is dragged forward, the blanket will tighten the tension, and if it is backward, the tension will be loosened.
Three. Cloth effect: color transfer, scale class (uneven, not only)
1. There is too much slurry on the front of the fabric and it cannot seep inside
2. To overcome the color transmission method 1 Reduce the pressure and reduce the amount of slurry.
2 Pressurize a smooth, opaque mesh before the color paste is transferred. If it is too close, it can be turned.
3 The color paste to be transferred can be recycled.
4 Increase the permeability of semi-finished products and keep the same width.
5 The color paste is thinned to increase permeability. (20 to 30 dapam)
3. Measure of fish scales to overcome 1. Use double force to increase the scraper while reducing the amount of slurry.
2 The viscosity of the color paste is appropriately thinned to increase the amount of slurry.
3 increase the semi-finished product permeability, padding 10g/l penetrant (process: printing semi-finished product padding penetrant or softener drying - printing)
The reasons for flowering in large areas: dye properties, the quality of grey cloths, and the permeability of semi-finished products.
1. Dye performance The compatibility of dyes with large difference in color is very easy to appear when the flower is dyed, and the dye paste is unstable, easy to gather, agglomerate; cause the dye solubility is poor, will precipitate out after placement, resulting in uneven flowering and color.
Solution:
1 Select dyes with similar dye transfer when used for color matching;
2 When the colorant is prepared, the dyestuff is fully dissolved and ready for use, avoiding long-term placement and ensuring consistency of the colorant concentration so as to avoid condensation of the dyestuff.
3 In order to reduce the dye migration, the color paste should be thick.
4 It is possible to press a glossy net after a large area pattern to reduce the residual color paste on the fabric surface and reduce the dye migration.
2. Gray cloth quality and semi-finished product permeability 1 The quality of the grey cloth is bad, the grid pattern is serious, and the cloth surface is uneven.
2 too much penetration of semi-finished products, fabric suction too much, the colorant is easy to infiltrate, the dye is easy to swim, resulting in hair, generally through the sizing (padded 50 g / l of 6% of alginic acid raw material paste to improve.
Color paste is the main reason for removing the squeegee:
Wide, large areas are easy to produce edge color: pre-print fabric pH value is not uniform, to the moisture rate is different, can be solved by washing. After the printing, it must be promptly ventilated, so that the temperature in the fabric side is the same, and the color difference during steaming (baking) is reduced. When choosing a dye, pay attention to whether it is sensitive to moisture and whether the compatibility in spelling is the same.
1. The chromatic aberration in the edge is generally due to the lack of rigidity of the blade, and the middle is softer than the middle and deep sides; it can be solved by changing the blade, or increasing the number of double blades, adjusting the blade angle and controlling the blade height in the edge.
Semi-finished edge caused by the color, you can solve the semi-finished product repair.
2. The color difference between before and after is due to the semi-finished product process instability (such as the PH value before and after the difference is greater), the color change ratio of the printing and squeegee sampling or the process parameters in the driving process change, etc. The measure is that each process must be in accordance with the specification operation!
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