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Application of three-dimensional printing technology in the three-dimensional printing of textiles

three-dimensional printing inks usually in paper, plastic substrate printed stereo image, there is a common dynamic three-dimensional printing, holographic stereogram printing, fabric three-dimensional printing, widely used in packaging and printing, security printing and textile printing field.This kind of special printing has been in textile printing plays an important role in textile printing, open up new development direction.A look at the following its application.


Application of three-dimensional printing technology in the three-dimensional printing of textiles


Three-dimensional printing is more popular in recent years of the special printing, printing is the simulation of human eyes, spacing, shooting from different angles, the left, right pixel recorded on a photosensitive material, when viewing the left eye, right eye, left see right pixel pixel principle for printing.It can reproduce realistic three-dimensional objects, with a strong sense of.Product image is clear, the level of rich, vivid, profound artistic conception; print gloss, bright color, not easy to fade, because the UV fluorescence printing ink product surface covered with a layer of concavo-convex lenticular grating plate, stereoscopic effect can therefore be directly to watch a panoramic picture.In addition, three-dimensional printing is also widely used in the manufacture of foundry industry printing, such as three-dimensional printing (3DP) technology, can be used in the manufacture of casting ceramic shell and core.With the continuous development of screen printing technology and people in fabric printing such as the novelty requirements increasing, the special printing has been in textile printing plays an important role in textile printing, open up new development direction.


Currently making thick stencil mainly have 3 kinds, each of them has its advantages and disadvantages.Although the emulsion of each coating methods used are slightly different, but must use rapid exposure to compensate the emulsion layer super thick.Rapid exposure of SBQ emulsion or pure photosensitive resin emulsion (liquid or diaphragm) the best selection of diazo or dual curing type.For screen 3D printing, not only to understand the anti-counterfeiting ink printing needs thick stencil, but more importantly, must be familiar with the methods of fabricating thick stencil.Below chats fabric selection and usage of material in three-dimensional printing.


Methods 1 liquid emulsion is the most basic liquid emulsion coating on the screen again, in the printing surface coated screen of 15 ~ 20 times, make the template to achieve the required thickness.Firstly, the first layer of emulsion coating on the screen printing surface, and then dry thoroughly.In order to shorten the drying time, drying room should be equipped with a dehumidifier, the humidity of 40% to 45%.With the end of the first layer of emulsion and after drying, adhesive tape around the same version of special ink printing surface image paste, to a rapid increase in the stencil thickness.Second layers of emulsion coating, drying and then affixed to a layer of adhesive tape.Repeat steps second, 3, until it reaches the stencil thickness required.The advantage of this method is that can operate using familiar techniques.The disadvantage is that the time spent too long (at least a few days), while the emulsion layer thickness is not good control.The most difficult is the result of this coating method of irregular, very possible leakage of the situation on the total number of coating is coated with a good.


2 capillary photoptic manbrane is a rapid manufacturing method of super thick stencil.The capillary photoptic manbrane paste into the screen, the most ideal material is one of the most thick pure photosensitive resin capillary membrane.The capillary 150 μ m has been sold in the market, 200 ~ 250 μ m diaphragm will also be available.


Paste the capillary photoptic manbrane, should first prepare a piece of plate, is less than the net frame size, larger than the image size, thickness of 1mm, the surface should be absolute smoothing.Recommend the use of glass plate, edge and a four angle to the smooth, and to ensure complete contact between the screen and the diaphragm; then put a capillary photoptic manbrane on flat, emulsion up; then the screen into the capillary photoptic manbrane, anti-counterfeiting ink printing down.Along the capillary photoptic manbrane side of a thin layer of liquid emulsion poured onto the screen, and the liquid emulsion dispersed in the entire screen, contact with the capillary photoptic manbrane, will die paste; drying emulsion layer.But be careful, must use liquid emulsion and capillary photoptic manbrane compatible, i.e. liquid emulsion using sensitizers and capillary photographic diaphragm, and has the same basic chemical properties.Most manufacturers are able to provide consistent emulsion emulsions and capillary photographic diaphragm.To increase the stencil thickness, can be the capillary photoptic manbrane / direct emulsion layer after drying, polyester base torn from the diaphragm to paste, another layer of capillary photoptic manbrane on top.


3 thick film making the fastest way to make the thick emulsion layer is as far as possible the use of film thickness.The thickness range of 100 ~ 700 μ M. instead of capillary photoptic manbrane, need a special process.The first choice diaphragm a desired thickness, cutting size 6 ~ larger than the image size template on the 10mm. from the membrane side tore off the plastic protective film, the emulsion side up, on a plate (flat above and the post capillary photoptic manbrane with flat).Will screen the temperature-sensitive ink printing face down, on a flat plate of the diaphragm.And then diluted liquid emulsion, emulsion, with 2 L water allocation.Will dilute liquid from one side of the diaphragm with.The emulsion membrane surface leveling, and uniform coverage.Emulsion brush to excess, will be the same version drying.When the screen completely dry, and then filled without scraping formed bucket coater coating screen liquid emulsion diluted.Again drying screen, thrown away from second layers of plastic protective film on the diaphragm, and prepare the exposure.


4 screen exposure and cleaning the screen exposure, because the emulsion type, thickness, coating technology and exposure equipment will affect the exposure time, no matter what kind of coating method, the exposure time is very difficult to grasp, is easy to appear insufficient exposure and exposure to excessive phenomenon, therefore the conditions can be equipped with a single exposure calibration device.In general, exposure can master: such as the exposure light source is of metal halide lamps 500kW, distance template 16cm, version of coating thickness of 700 μ m, the exposure time should be 7.5 ~ 8min.


Security inks and additives selected 5 ink some ink manufacturers can provide suitable for stereoscopic printing, and some manufacturers have developed a new type of ink production line.But it should be noted, stereoscopic printing ink is not foaming ink, in fact the foaming any visible degree will affect the clarity and three-dimensional effect.Three-dimensional printing ink, the curing temperature in the solidification range standard plastic ink inside (generally 149 ~ 171 ℃), but should be adapted to the curing temperature of super thick ink layer.If ink layer is completely cured, three dimensional printing ink will have a standard plastic ink as good elasticity.


Although 3D printing ink is not common, but plastic printing ink layer of the ink and the common people of the thick with great distinction.If the correct operation, 3D printing image will be subtle levels of bright and clear edge, the edge of the printed fabric surface vertical projection, ink wall is smooth.Due to the use of three-dimensional printing inks are relatively thick, so the best printing speed slower than usual.In order to get better effect, printing stroke should be clean, smooth, shaving two times will make the printing ink rubbed against dirty, although this kind of ink is very thick, the template is very thick, but 3D printing can print print three-dimensional hierarchical image effect is very good.If you want to increase the ink film thickness, the best way is to increase the thickness of the emulsion layer on the screen, not by method two times ink scraping on a screen to increase the ink layer thickness.


6 debug printing three-dimensional printed in full automatic screen printing machine, printing machine debugging is easy, this is because it can well control the net margin, net margin is the key factor in printing.Automatic screen printing machine operation instruction should pay attention to the following several points: ① will screen mounted on the printing machine, network distance to the minimum; the inking speed slightly slower than normal, the constant pressure ink plate.If the ink plate angle adjustable, can be between inking plate and screen angle to the minimum, then the ink coverage in print; the use of scraper 75 ~ 80 ° medium hardness, adjusting the squeegee pressure, so that it can be transferred with the version of the mirror ink to the fabric.Squeegee speed slightly slower than normal, and blade angle; ④ printing three-dimensional parts of the image should be the final printed, printed immediately after the drying.If the first 3D printing ink, printing ink drying of other color, can appear near the three-dimensional printing ink part deformation.


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