Common problems and treatment methods of paint color paste factory
date£º2020-07-03
hits£º4264
Common problems and treatment methods of paint color paste factory
1. The treatment method of the phenomenon of plugging the net in the printing of flat mesh fabrics
Reasons: The density of the manuscript is not enough; the improper process of flat screen plate making; the quality problem of paint color paste.
Treatment method:
Manuscripts are currently produced on a computer. The graphic pattern of the manuscript to the higher the black density, the better the shading effect. If the blackness is not enough, the shading effect is worse, the ultraviolet light is easy to transmit, and it will form a plug net; the gray haze of the manuscript should be low, if the gray haze is high, blocking the ultraviolet light transmission, it needs to increase the exposure time Done, it is easy to cause excessive exposure time and blockage.
Improper development and curing operation of flat screen plate-making will lead to plugging. When developing, it is necessary to think that the ultraviolet light is transmitted from the printing surface of the screen to the printing surface. The printing surface is full of light and can be washed with high pressure water; and the level of light crosslinking of the printing surface is smaller than the printing surface, and the film Significantly tender, should be rinsed with pressureless residual slurry of water during washing to prevent the residual slurry from blocking the mesh. Before curing, stop the second exposure to make the adhesive layer full of light and then apply the curing agent.
When printing in a paint color paste factory, the paste used contains impurities or undissolved particles that clog the mesh, so that the paste cannot be scraped from the mesh during printing, so the paste should be filtered to remove impurities before use. When making the coating adhesive, choose a good quality adhesive and a thickener with good compatibility. The film formation should not be too fast when scraping.
2. The causes of the sharp corners of the pattern becoming rounded and the loss of small dots
As the paste gradually thickens during the printing of the album, making it less mobile, it is necessary to increase the pressure of the squeegee when passing through the mesh to pass through the mesh, but due to the support of the photosensitive glue at the edge of the screen member case, The paint color paste factory prevents the doctor blade from squeezing the paste out of the mesh at any time, so that the slurry particles stay in the mesh to form a film, forming a mesh infarction at the edge of the photosensitive glue.
Treatment method:
(1) Use low mesh, monofilament, thin wire mesh;
(2) The photoresist should not be too thick;
(3) The slurry must maintain a certain fluidity at any time.
3. How to deal with flat screen imprint in fabric printing
Reasons: The color rate of the screen frame is too deep; the frame frame is not properly glued; the viscosity of the color paste is too low.
Approach:
The color acquisition rate of the screen frame joint is too deep, and horizontal joint printing occurs. The opening screen of the paint color paste factory should be correct to prevent stacking at street junctions and large spots on the ground. Under the premise of not affecting the energy of the pattern, it can be considered to intersect and prevent the horizontal straight line stacking of the two ends of the screen.
Use meshes on the fabric surface of the mesh frame, such as window screen, thick nylon mesh and other fabrics for additional posting. Don't post near the screen frame when posting. Select the width of the two ends of the screen frame to leave a little space on the lateral surface between the screen frames. On the basis of not affecting the printing and scratching, prevent the impression of imprint.
The viscosity of the color paste should be moderately distributed, which is beneficial for the fabric to have a uniform paste and smooth spots.
4. The progress of the picture margin from clear to vague
At the beginning of printing, because the fluidity of the paste is better, the doctor blade can cut the paste clean without much force. With the continuous evaporation of water in the glue slurry, the slurry becomes thicker and thicker, and the viscosity becomes larger. It is necessary to increase the size of the doctor blade to clean the remaining slurry. Due to the added strength, the paint color paste factory caused elastic screen deformation of the screen, and the effect of the squeegee was lost. After the screen rebounded, the screen edge of the screen printing surface will be reversed to the paste. In the second time When printing, these pastes will move to the margin of the picture, and the vague appearance of the margin of the picture will occur.
Approach:
(1) Use wire mesh with low elasticity, such as polyester wire mesh;
(2) Increase the tension of the wire mesh;
(3) Reduce the resilience of the wire mesh;
(4) Adjust the viscosity of the slurry at any time.
1. The treatment method of the phenomenon of plugging the net in the printing of flat mesh fabrics
Reasons: The density of the manuscript is not enough; the improper process of flat screen plate making; the quality problem of paint color paste.
Treatment method:
Manuscripts are currently produced on a computer. The graphic pattern of the manuscript to the higher the black density, the better the shading effect. If the blackness is not enough, the shading effect is worse, the ultraviolet light is easy to transmit, and it will form a plug net; the gray haze of the manuscript should be low, if the gray haze is high, blocking the ultraviolet light transmission, it needs to increase the exposure time Done, it is easy to cause excessive exposure time and blockage.
Improper development and curing operation of flat screen plate-making will lead to plugging. When developing, it is necessary to think that the ultraviolet light is transmitted from the printing surface of the screen to the printing surface. The printing surface is full of light and can be washed with high pressure water; and the level of light crosslinking of the printing surface is smaller than the printing surface, and the film Significantly tender, should be rinsed with pressureless residual slurry of water during washing to prevent the residual slurry from blocking the mesh. Before curing, stop the second exposure to make the adhesive layer full of light and then apply the curing agent.
When printing in a paint color paste factory, the paste used contains impurities or undissolved particles that clog the mesh, so that the paste cannot be scraped from the mesh during printing, so the paste should be filtered to remove impurities before use. When making the coating adhesive, choose a good quality adhesive and a thickener with good compatibility. The film formation should not be too fast when scraping.
2. The causes of the sharp corners of the pattern becoming rounded and the loss of small dots
As the paste gradually thickens during the printing of the album, making it less mobile, it is necessary to increase the pressure of the squeegee when passing through the mesh to pass through the mesh, but due to the support of the photosensitive glue at the edge of the screen member case, The paint color paste factory prevents the doctor blade from squeezing the paste out of the mesh at any time, so that the slurry particles stay in the mesh to form a film, forming a mesh infarction at the edge of the photosensitive glue.
Treatment method:
(1) Use low mesh, monofilament, thin wire mesh;
(2) The photoresist should not be too thick;
(3) The slurry must maintain a certain fluidity at any time.
3. How to deal with flat screen imprint in fabric printing
Reasons: The color rate of the screen frame is too deep; the frame frame is not properly glued; the viscosity of the color paste is too low.
Approach:
The color acquisition rate of the screen frame joint is too deep, and horizontal joint printing occurs. The opening screen of the paint color paste factory should be correct to prevent stacking at street junctions and large spots on the ground. Under the premise of not affecting the energy of the pattern, it can be considered to intersect and prevent the horizontal straight line stacking of the two ends of the screen.
Use meshes on the fabric surface of the mesh frame, such as window screen, thick nylon mesh and other fabrics for additional posting. Don't post near the screen frame when posting. Select the width of the two ends of the screen frame to leave a little space on the lateral surface between the screen frames. On the basis of not affecting the printing and scratching, prevent the impression of imprint.
The viscosity of the color paste should be moderately distributed, which is beneficial for the fabric to have a uniform paste and smooth spots.
4. The progress of the picture margin from clear to vague
At the beginning of printing, because the fluidity of the paste is better, the doctor blade can cut the paste clean without much force. With the continuous evaporation of water in the glue slurry, the slurry becomes thicker and thicker, and the viscosity becomes larger. It is necessary to increase the size of the doctor blade to clean the remaining slurry. Due to the added strength, the paint color paste factory caused elastic screen deformation of the screen, and the effect of the squeegee was lost. After the screen rebounded, the screen edge of the screen printing surface will be reversed to the paste. In the second time When printing, these pastes will move to the margin of the picture, and the vague appearance of the margin of the picture will occur.
Approach:
(1) Use wire mesh with low elasticity, such as polyester wire mesh;
(2) Increase the tension of the wire mesh;
(3) Reduce the resilience of the wire mesh;
(4) Adjust the viscosity of the slurry at any time.
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