CN113477429A - Field jet coating system and field jet coating method - Google Patents
Field jet coating system and field jet coating method Download PDFInfo
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- CN113477429A CN113477429A CN202110899193.9A CN202110899193A CN113477429A CN 113477429 A CN113477429 A CN 113477429A CN 202110899193 A CN202110899193 A CN 202110899193A CN 113477429 A CN113477429 A CN 113477429A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/10—Arrangements for supplying power, e.g. charging power
Abstract
The present disclosure relates to a field jet coating system for coating a substrate by means of field jet, the field jet coating system comprising a coating assembly comprising: a coating mechanism spaced apart from the substrate, including a coating agent storage mechanism and a coating agent injection mechanism; a voltage source which forms a voltage field between the coating mechanism and the substrate, the voltage field generating an electric field force to cause the droplets to form a charged mist droplet group and move toward the substrate under the action of the electric field force, the coating agent storage mechanism being configured as a knife beam, the coating agent injection mechanism including a needle pipe part having an air flow passage and a coating agent passage constituted by the needle pipe, the air flow passage being in fluid communication with the air flow supply part, the coating agent passage being in fluid communication with the knife beam, and the coating agent forming droplets under the action of a coating agent supply pressure of the coating agent supply part and/or a negative pressure of the air flow, an air flow supply part, and a coating agent supply part. The present disclosure also relates to a field jet coating method.
Description
Technical Field
The present disclosure relates to the field of substrate coating, and more particularly, to a field jet coating system and a field jet coating method.
Background
Coating is to attach a material or a coating agent with a specific function on the surface of a target substrate to replace the original solid-gas interface of the substrate so as to protect the substrate, or to improve the surface function of the substrate so as to endow the substrate with new functional characteristics, or to directly utilize the surface characteristics of the coating agent coating so as to improve the use value of a final product or facilitate subsequent processing. The coating methods commonly used at present mainly include dip coating, blade coating, slit coating and curtain coating. With the increasing technical requirements of modern products, higher and higher requirements are also put on the coating technology and the coating environment in the coating industry. Precision coating techniques are also continually being innovative and combined to meet the ever-increasing demands of modern industrial manufacturing. The above-mentioned different coating techniques each still suffer from certain drawbacks with respect to the coating technical requirements of high precision, thin coating and integration of multifunctional layers.
Disclosure of Invention
It is an object of the present disclosure to propose a field jet coating system and a field jet coating method which are able to overcome at least one of the drawbacks of the prior art.
A first aspect of the present disclosure relates to a field jet coating system for coating a substrate by means of field jets, characterized in that the field jet coating system comprises a coating assembly comprising:
at least one coating mechanism spaced apart from the substrate, the coating mechanism including a coating agent storage mechanism for storing a coating agent and a coating agent ejection mechanism for ejecting the coating agent in the form of a jet and causing it to form droplets; and
a voltage source configured to create a voltage field between the coating mechanism and the substrate, the voltage field generating an electric field force such that the droplets form a population of charged droplets and move toward the substrate under the influence of the electric field force,
wherein the coating agent storage mechanism is configured as an elongated blade beam, the coating agent injection mechanism includes a needle pipe member having an air flow passage and a coating agent passage constituted by a needle pipe, the air flow passage being in fluid communication with the air flow supply member, the coating agent passage being in fluid communication with the blade beam, the coating agent storage mechanism being configured as an elongated blade beam, the coating agent injection mechanism including an air flow supply member for supplying an air flow, and a coating agent supply member for supplying a coating agent to the needle pipe member via the blade beam, the coating agent injection mechanism forming the liquid droplets under the action of a coating agent supply pressure of the coating agent supply member and/or a negative pressure of the air flow.
The technical effect is that the present disclosure implements a non-contact coating technique that can reduce or avoid friction between the coating head and the substrate in the prior art coating technique, slowing down the penetration rate of the coating agent into the substrate. In addition, the coating amount can be accurately controlled by the flow rate of the metering pump, the energy consumption is low, and the rapid coating of the ultrathin coating can be realized.
In some embodiments, the field jet coating system further comprises a manipulation mechanism configured to move the coating mechanism to adjust a relative position of the ejection orifice of the coating agent ejection mechanism to the substrate or a pointing direction of the ejection orifice of the coating agent ejection mechanism or a distance of the ejection orifice of the coating agent ejection mechanism to the substrate.
In some embodiments, the field jet coating system further comprises a voltage regulation component configured to regulate the output voltage of the voltage source.
In some embodiments, at least one coating mechanism is disposed on only one side of the substrate; or at least one application member is arranged on both sides of the substrate, and the application members on both sides of the substrate are arranged opposite to each other or offset.
In some embodiments, the needle cannula components are arranged on the knife beam at the same spacing from each other.
In some embodiments, the needle cannula component includes a central coating agent passage and the needle cannula component includes an air flow passage annularly disposed about the central coating agent passage or a plurality of air holes or slits disposed in a distributed manner about the central coating agent passage, the air holes or slits forming the air flow passage.
In some embodiments, the air flow supplying part is configured as an air pump for generating compressed air.
In some embodiments, the coating agent supply means is configured as a metering pump for dosing the coating agent.
In some embodiments, one pole of the voltage source is connected to the coating mechanism and the other pole of the voltage source is connected to the substrate or the substrate is grounded.
In some embodiments, the voltage of the voltage source is 10-60 kV.
In some embodiments, the field jet coating system has at least one of the following operating parameters:
the distance between the needle tube tip of the needle tube component and the substrate is 0.4-20 cm;
the pressure of the air flow is 0.1-1.0 MPa;
the diameter of the coating agent channel is 0.1-2.5 mm;
the excess of the coating agent channel exceeding the air flow channel is less than or equal to 5 mm.
In some embodiments, a single knife beam or a plurality of knife beams are configured in one coating unit.
In some embodiments, the longitudinal direction of the coating mechanism is transverse to the direction of advancement of the substrate.
In some embodiments, the coating means is provided with a reciprocating device for effecting reciprocating movement of the coating means in the longitudinal direction thereof.
In some embodiments, the reciprocating means comprises a drive motor having a motor gear that meshes with an eccentric gear, the eccentric rotational motion of which is transmitted to the coating mechanism through a link mechanism, so that the eccentric rotational motion of the eccentric gear is converted into the reciprocating movement of the coating mechanism in the longitudinal direction thereof.
In some embodiments, the reciprocating means is designed such that the amount of movement of the coating mechanism is 50mm or less and/or the frequency of reciprocation of the movement of the coating mechanism is 80 times/minute or less.
In some embodiments, the field jet coating system includes a plurality of or a plurality of pairs of coating mechanisms, at least two or at least two pairs of coating mechanisms among the plurality of or the plurality of pairs of coating mechanisms being reciprocally movable in a longitudinal direction thereof by a common reciprocating means or by respective reciprocating means with a predetermined phase difference.
In some embodiments, the field jet coating system comprises a guide assembly configured to guide a substrate through the coating assembly.
Another aspect of the present disclosure relates to a field jet coating method for coating a substrate by field jet, characterized in that the field jet coating method comprises the steps of:
guiding a substrate through a coating assembly comprising a coating mechanism and a voltage source by a guiding system; and is
The substrate is coated by a coating mechanism and a voltage source,
wherein the coating mechanism is spaced apart from the substrate, the coating mechanism includes a coating agent storage mechanism configured as an elongated blade for storing a coating agent, and a coating agent injection mechanism for ejecting the coating agent in the form of a jet and forming the coating agent into droplets, the coating agent injection mechanism includes a needle pipe member having an air flow passage and a coating agent passage constituted by a needle pipe, the air flow passage being in fluid communication with the air flow supply member, and a coating agent supply member for supplying the coating agent to the needle pipe member via the blade,
wherein the voltage source applies a voltage to the coating mechanism such that an electrostatic field is generated between the coating mechanism and the substrate and a voltage is generated on the tip of the needle cannula component,
wherein the coating agent is output from the coating agent channel and formed into droplets by the action of the coating agent supply pressure of the coating agent supply part and/or the negative pressure of the air flow, the droplets are charged by the voltage on the tip of the needle pipe part, and the charged droplets form a charged mist droplet group under the action of an electric field force after being scattered and move toward and adsorb to the substrate, so that the substrate is coated.
In some embodiments, the field jet coating method is carried out by a field jet coating system according to any one of claims 1 to 18.
In some embodiments, the coating agent is a polar liquid.
In some embodiments, the coating agent is a water-soluble liquid, or an aqueous dispersion liquid, or a polar organic liquid.
In some embodiments, the substrate is a fabric, or paper, or plastic sheet, or metal sheet, or rubber carpet tape, or fiberglass film.
In some embodiments, the needle cannula is made of a conductive metal material.
The present disclosure addresses the continuing need for coating technology to be developed in the direction of high precision, thin coatings and multi-functional layer integration, innovatively taking advantage of the characteristics of the atomized jets of coating agents in the gas flow field and/or electrostatic field, enabling systems and methods for coating substrates via field jets.
The above-mentioned features and the features to be mentioned below as well as the features shown in the drawings can be combined with one another as desired, provided that the individual features to be combined are not mutually inconsistent. All technically feasible combinations of features are the technical contents contained in the description.
Drawings
The disclosure is further explained below with the aid of exemplary embodiments with reference to the schematic drawings. Wherein:
FIG. 1 is a schematic view of a vertical field jet coating system according to a first embodiment of the present disclosure, wherein the coating mechanism is disposed opposite each other on both sides of the substrate,
figure 2 is a schematic view of a horizontal field jet coating system according to a second embodiment of the present disclosure,
figure 3 is a block diagram of the arrangement of one of the coating mechanisms of the coating assembly of figures 1 and 2,
figure 4A is a schematic perspective view of a needle cannula assembly according to one embodiment,
figure 4B is a schematic perspective view of a needle cannula assembly in accordance with another embodiment,
figure 4C is a cross-sectional view of the needle cannula assembly of figures 4A and 4B,
figures 5A through 5F are cross-sectional views of needle cannula components according to other embodiments,
figures 6 and 7 are schematic top and side views of shuttles for two adjacent coating mechanisms of a coating assembly,
FIGS. 8a and 8b are respectively an electron microscope image of the microstructure of the under-coated coating film obtained in application example 1 and an electron microscope image of the microstructure of the over-coated coating film,
FIG. 9 is an electron micrograph of the microstructure of the coating film obtained in application example 2,
FIG. 10 is a schematic view of a vertical field jet coating system according to a third embodiment of the present disclosure, wherein the coating mechanisms are positioned offset from each other on both sides of the substrate.
Detailed Description
Fig. 1 is a schematic view of a vertical field jet coating system according to the present disclosure having a first embodiment.
The field jet coating system includes a guide assembly 10 and a coating assembly 100. The guide assembly 10 is configured for guiding the substrate 1 through the coating assembly 100. The substrate 1 may be, for example, a fabric, or paper, or a plastic film/sheet, or a metal film/sheet, or a rubber mat tape, or a fiberglass film. In the embodiment shown in fig. 1, the coating assembly 100 is provided with a plurality of coating mechanisms 110, each coating mechanism 110 being configured to extend horizontally and overlap each other in the vertical direction. In this embodiment, the substrate 1 may be moved in a vertical direction past the coating assembly 100. The coating means 110 may be arranged in pairs opposite each other on both sides of the substrate 1, for example, 4 pairs of oppositely arranged coating means 110 are shown in fig. 1. The coating means 110 can also be arranged offset to one another on both sides of the substrate 1, see the embodiment shown in fig. 10. Of course, the present disclosure is not limited thereto, and any other number of one or more pairs of coating mechanisms 110 may be provided, and the coating mechanisms 110 may also be provided on only one side of the substrate 1. By providing a plurality or pairs of coating means 110, on the one hand a uniform and sufficient spraying of the coating agent can be achieved and, on the other hand, individual control of the individual coating means 110 can be facilitated.
The coating mechanism 110 includes a coating agent storage mechanism 111 for storing a coating agent and a coating agent ejection mechanism for ejecting the coating agent in the form of a jet and causing it to form droplets. The longitudinal direction of the coating means 110 may be transverse, in particular perpendicular, to the advancing direction of the substrate 1. Here, "transverse" may mean that the longitudinal direction of the application means 110 is at an angle to the advancing direction of the substrate 1, for example, the angle may range from 45 DEG or less, preferably 30 DEG or less, particularly preferably 20 DEG or less, or that the longitudinal direction of the application means 110 is substantially perpendicular to the advancing direction of the substrate 1. The coating agent storage mechanism 111 may be configured as a knife beam, which may be elongated. The coating agent reservoir 111 embodied as a knife beam can be embodied continuously as shown in fig. 3, i.e. a single coating agent reservoir 111 is embodied in one coating mechanism 110. In some embodiments, a plurality of coating agent storage mechanisms 111 can also be configured in one coating mechanism 110, and these coating agent storage mechanisms 111 can be arranged side by side, for example. In the case where a plurality of coating agent storage mechanisms are configured, individual control of the respective coating agent storage mechanisms can be achieved. Thereby, different coating agents can be supplied to the respective coating agent storage mechanisms.
The coating agent ejection mechanism may include a needle pipe part 113 and an air flow supply part 114 for supplying air flow. The needle pipe member 113 may have an air flow passage 32 and a coating agent passage 31 constituted by a needle pipe. The needle tube may be of a conductive metal material. The airflow passage 32 may be in fluid communication with an airflow supply component 114. The coating agent channel 31 may be in fluid communication with the coating agent storage mechanism 111. Referring to fig. 3, a plurality of needle pipe members 113 may be arranged on one coating agent storage mechanism 111 at the same interval from each other (e.g., side by side). The spacing between adjacent needle cannula parts 113 may be 5-50mm, such as 10-40mm or 20-30 mm. The needle pipe members 113 may be arranged in a single row on the coating agent storage mechanism 111. The needle pipe members 113 may also be arranged in a plurality of rows on the coating agent storage mechanism 111. In the case where one single or a plurality of coating agent storage mechanisms 111 are configured in one coating mechanism 110, the number of needle tube members 113 in a single row may be 5 to 100, for example, 8 to 16. The air flow supplying part 114 may be, for example, configured as an air pump for generating compressed air. Each of the needle cannula parts 113 may be in fluid communication with a different associated gas flow supply part 114 or jointly with the same gas flow supply part 114. Gas flow supply assembly 114 and/or needle assembly 113 may be equipped with a gas pressure regulating device that may regulate the gas pressure of the gas flow generated by gas flow supply assembly 114 and/or regulate the gas pressure of the gas flow delivered to needle assembly 113.
The coating agent injection mechanism may further include a coating agent supply part 115 for supplying the coating agent to the needle pipe part 113 via the blade beam. The coating agent supply means 115 may, for example, be configured as a metering pump for feeding the coating agent, in particular dosing the coating agent. The coating agent supply part 115 may be disposed on the coating agent storage mechanism 111, for example. The coating agent supply part 115 may be configured to supply the coating agent to the needle pipe part 113 by pressing.
The coating agent may be formed into droplets by the coating agent supply pressure or pump pressure of the coating agent supply part 115 and/or the negative pressure of the air flow.
In addition to the coating mechanism 110, the coating assembly 100 further comprises a voltage source 120, the voltage source 120 being configured to create a voltage field between the coating mechanism 110 and the substrate 1, the voltage field generating an electric force such that the droplets form a population 2 of charged droplets under the influence of the electric force and move towards the substrate 1. Specifically, in the voltage current, the voltage field generates a force to the charges (or charged particles) therein, and the magnitude of the force can be given by the formula F ═ qE (q is the charged amount, and E is the electric field strength). When a high voltage is applied to the coating agent when the coating agent flows out from the coating agent passage 31, the coating agent droplets are broken into fine particles by electrostatic force, and a spray phenomenon occurs to form the charged mist droplet group 2.
The individual coating units 110 can be electrically connected to different associated voltage sources 120, or jointly to the same voltage source 120. In the process of research and development, the inventor of the application finds a series of parameters influencing the coating effect, and analyzes and optimizes the parameters. For example, the inventors of the present application found that the application of voltage has a great influence on the charge-to-mass ratio of the coating agent in the field jet coating process. For field jet coating of coating agents, the charge-to-mass ratio of the coating agent generally tends to increase and then decrease as the applied voltage increases. When the charge-to-mass ratio is increased, the repulsive force between droplets is increased, and the coating agent coverage of the single-needle-tube jet flow is wider. In addition, the application of voltage also has a significant effect on the coating agent drop pattern, the number of drops and the size. Thus, in the present application, the voltage of the voltage source 120 is selected to be 10-60kV, such as 20-50kV or 30-40 kV.
One pole (i.e., positive or negative) of the voltage source 120 may be connected to the coating mechanism 110 and the other pole (i.e., negative or positive) of the voltage source 120 may be connected to the substrate 1 or the substrate 1 may be grounded, for example, through a turning roll for transporting the substrate 1. The coating assembly 100 may also include a voltage regulation component configured to regulate the output voltage of the voltage source 120. The coating assembly 100 may further include a manipulating mechanism provided for moving the coating mechanism to adjust a relative position of the coating agent spraying mechanism, particularly, an ejection port of the needle pipe part 113 of the coating agent spraying mechanism, to the substrate 1 or a direction of the ejection port of the coating agent spraying mechanism or a distance from the ejection port of the coating agent spraying mechanism to the substrate 1. The actuating mechanism may for example comprise a motor for providing a driving force and an actuating member for imparting a translational and/or rotational movement to the coating mechanism. In the shut-down state, in particular in the inactive state of the actuating device, the main direction of the jet of the coating agent injection device, in particular of the outlet orifice of the needle member 113 of the coating agent injection device, can be essentially perpendicular to the surface plane of the substrate 1 or can also be at an angle to the surface plane of the substrate 1, for example at 75 °, preferably at 60 °, particularly preferably at 45 °. This inclination angle is particularly suitable in the case of the horizontal arrangement described below, for preventing the liquid flow from passing back into the ejection orifice of the coating agent ejection mechanism to interfere with the ejection of the liquid droplets.
Here, the coating agent is discharged from the coating agent passage 31 and formed into droplets by the coating agent supply pressure or pump pressure of the coating agent supply part 115 and/or the negative pressure of the air flow, the droplets are charged by the voltage at the tip of the needle pipe part 113, the charged droplets are broken by the interaction of the secondary air flow formed by the air flow, the electrostatic field, and the surface charge of the droplets, and the broken droplets are formed into a charged mist droplet group 2 by the electric field force and moved toward the substrate 1 and adsorbed onto the substrate 1, so that the substrate 1 is coated.
The coating mechanisms 110 may use the same or different coating agents, the flow rate of the coating agents of the coating mechanisms 110 may be controlled using the same voltage/air pressure or different voltage/air pressure, and the same angle between the needle pipe part 113 and the substrate 1 or different angles between the needle pipe part 113 and the substrate 1 may be used.
The guide assembly 10 may include a first tenter dividing roll 11, a first tension roll 13, a skew opposite side device 14, a traction device 15, a second tension roll 16, and a second tenter dividing roll 17, which are sequentially disposed in the traveling direction of the substrate 1. A first turning roll 12 may be disposed downstream of the first stenter wire roll 11 such that the substrate 1 is deflected by about 90 ° by the first turning roll 12. A second turning roll 18 may be disposed downstream of the second stenter wire roll 17 such that the substrate 1 travels vertically upward after passing through the second turning roll 18. The substrate 1 is finally diverted away from the coating assembly 100 by a third diverting roller 19. A plurality of turning rolls may be provided in the traveling path of the substrate 1 so that the substrate 1 is appropriately deflected, so that the entire apparatus can be compactly designed. The guide assembly 10 may have more or less turning rollers as the actual need arises.
Fig. 2 is a schematic view of a horizontal field jet coating system according to the present disclosure having a second embodiment. The second embodiment differs from the first embodiment mainly in that the individual coating means 110 provided in the coating assembly 100 extend vertically and follow one another one after the other in the horizontal direction, so that the substrate 11 moves past the coating assembly 100 in the horizontal direction. In other respects, reference may be made to the description of the first embodiment with respect to fig. 1.
Fig. 3 is a view showing the arrangement of one of the coating mechanisms 110 of the coating module 100 of fig. 1 and 2. The coating mechanism 110 has a coating agent storage mechanism 111 configured as a knife beam arranged perpendicular to the traveling direction of the substrate 1. The width of the coating agent storage means 111 may substantially correspond to the width of the substrate 1. On the coating agent storage mechanism 111, an array of 10 needle members 113 is exemplarily arranged, which may be evenly distributed over the width of the coating agent storage mechanism 111.
FIG. 4A is a schematic perspective view of a needle cannula component 113 according to one embodiment, and FIG. 4C is a cross-sectional view of the needle cannula component 113 according to FIG. 4A. The needle pipe member 113 includes a central coating agent passage 31 and an air flow passage 32 annularly disposed around the coating agent passage 31. The annular air flow channel 32 can be connected to a suitable air flow supply 114 (see fig. 1), which air flow supply 114 can generate compressed air, which constitutes the air flow. The pressure of the gas stream may be in the range 0.1 to 1.0MPa, for example 0.2 to 0.8MPa or 0.3 to 0.6 MPa. The coating agent passage 31 or needle may extend beyond the gas flow passage 32, typically by less than or equal to 5mm, for example by about 3 mm. The diameter of the coating agent passage 31 or the inner diameter of the needle pipe part 113 may be 0.1-2.5mm, for example 0.3-2.0mm or 0.5-1.5 mm. The distance of the needle tip of the needle cannula part 113 from the substrate 1 may be 0.4-20cm, such as 1-18mm or 2-10mm, such as about 5mm or 6 mm.
FIG. 4B is a schematic perspective view of a needle cannula component 113 in accordance with another embodiment. The needle pipe member 113 shown in fig. 4B differs from the needle pipe member 113 shown in fig. 4A mainly in that the end face of the needle pipe member 113 is flush, i.e., the air flow passage 32 and the coating agent passage 31 end flush in the same plane. The cross-sectional view shown in FIG. 4C may also be applied to the needle cannula part 113 shown in FIG. 4B.
Fig. 5A to 5F are cross-sectional views of the needle pipe member 113 according to other embodiments.
In the embodiment shown in fig. 5A, the needle tubing part 113 may have a circular cross-section. The needle pipe member 113 may have a central coating agent passage 31 (or needle pipe) and eight air holes uniformly distributed around the coating agent passage 31, the air holes respectively constituting the air flow passages 32.
In the embodiment shown in fig. 5B, the needle tubing part 113 may have a hexagonal cross-section. The needle pipe member 113 may have a central coating agent passage 31 (or needle pipe) and six air holes uniformly distributed around the coating agent passage 31, the air holes respectively constituting the air flow passages 32.
In the embodiment shown in fig. 5C, the needle tubing part 113 may have a square cross-section. The needle pipe member 113 may have a central coating agent passage 31 (or needle pipe) and four air holes uniformly distributed around the coating agent passage 31, the air holes respectively constituting the air flow passages 32.
In the embodiment shown in fig. 5D, the needle tubing part 113 may have a circular cross-section. The needle member 113 may have a central dye passage 31 (or needle) and three rectangular slits 32 uniformly distributed around the dye passage 31, the slits 32 respectively constituting the air flow passages 32. The three rectangular slits 32 may intersect in their extension to form a regular triangle.
In the embodiment shown in fig. 5E, the needle tubing part 113 may have a circular cross-section. The needle member 113 may have a central dye passage 31 (or needle) and four arcuate slits 32 uniformly distributed around the dye passage 31, the slits 32 respectively forming the gas flow passages 32. The four arcuate slits 32 may intersect in their extension to form a circle concentric with the central dye channel 31.
In the embodiment shown in fig. 5F, the needle tubing part 113 may have a square cross-section. The needle member 113 may have a central dye passage 31 (or needle) and four rectangular slits 32 uniformly distributed around the dye passage 31, the slits 32 respectively constituting the gas flow passages 32. The four rectangular slits 32 may intersect in their extension to form a square.
Fig. 6 and 7 are schematic top and side views of shuttles for two adjacent coating mechanisms 110 of a coating assembly. All of the coating means 110 or a part of the coating means 110 of the coating assembly may be reciprocatingly movable, which may be provided with common or respective reciprocatingly movable means. As shown in fig. 6 and 7, two adjacent coating units 110 are provided with a common reciprocating device so that the two adjacent coating units 110 can reciprocate in the longitudinal direction thereof in opposition to each other. The reciprocating means may comprise a drive motor 23, for example a variable frequency motor. The driving motor 23 may have a motor gear 24, the motor gear 24 may be engaged with an eccentric gear 25, and the eccentric rotational motion of the eccentric gear 25 may be transmitted to two adjacent coating mechanisms 110 through a link mechanism, so that the eccentric rotational motion of the eccentric gear 25 may be converted into respective reciprocating movements of the two adjacent coating mechanisms 110 in the longitudinal direction thereof. The linkage mechanism may include a link 26 fixed to the eccentric gear 25, the link 26 may be connected to a swing arm 27, and the swing arm 27 may be connected to a coating mechanism connecting arm 28. The amount of movement of two adjacent coating means 110 can be selected, for example, to be 50mm or less, for example 40mm or less. The frequency of the reciprocation of the movement of two adjacent coating means 110 can be selected, for example, to be ≦ 80 times/min, for example ≦ 60 times/min.
The present disclosure is further illustrated by the following non-limiting application examples, but it should be noted that these application examples should not be construed as limiting the present disclosure.
Application example 1: to the application of a field jet coating system as shown in fig. 1, 2 or 10 to a PET film by field jet to single-side double coating, i.e., coating two superposed coatings on one side of the PET film, the bottom coating as a release layer and the top coating as an ink-bearing layer. To this end, two sets of coating mechanisms on one side of the field jet coating system can participate in the coating, one of which performs the bottom coating and the other performs the top coating, wherein,
the matrix is as follows: a PET film;
the coating agents used for the substrate bottom coating are: the coating agent composition described in patent CN200710040431.0 example 1, namely, an acrylic coating agent composition as a barrier layer, wherein the composition comprises, by total weight of the composition: 25% of acrylic resin; 20% of ethyl acetate and 50% of dimethylformamide; dioctyl phthalate was 4.5%; and 0.5% of gas phase cinnamon dioxide.
The coating agents used for coating the substrate surface layer are as follows: the coating agent composition described in patent CN200710040431.0 example 2, namely, an acrylic coating agent composition as an ink-bearing layer, wherein the coating agent composition comprises, based on the total weight of the composition: 7% of acrylic monomer and 14.5% of butyl acrylate monomer; 18.6 percent of ethylene lipidated dextrin; 6% of sorbitan monooleate; 1% of sodium pyrrolidone carboxylate; 49100.5% of sulfosuccinate; 0.5 percent of potassium persulfate; 0.001% of N-methylolacrylamide; 0.15 percent of sodium sulfite; and the balance to 100% distilled water.
The coating parameters include: the voltage of the power supply was 20kV, the distance between the tip of the needle tube and the substrate was 5cm, and the vehicle speed, i.e., the substrate feed speed, was 30 m/min.
After coating, the substrate is dried by hot air at 80 ℃ to obtain a finished product.
The microstructure of each coating layer can be seen by microscopy, with particular reference to fig. 8a and 8 b.
Application example 2: to the application of a field jet coating system as shown in fig. 2 to single-side single-layer coating of gravure paper by field jet, i.e. coating one coating layer on one side of the gravure paper. To this end, a single-sided set of coating mechanisms of the field jet coating system can participate in the coating, wherein,
the matrix is as follows: gravure printing paper;
the coating agents used for coating the substrate were: the coating agent composition described in example 1 of patent CN200510111764.9, which comprises the following components in percentage by weight:
the copolymer of butadiene and styrene is 45 percent; 45 percent of the monomer comprises 70 percent of butadiene monomer, 30 percent of styrene monomer,
the content of the glycerol is 5 percent,
20 percent of superfine heavy calcium carbonate,
FOAMA Ster-340 in German Hangao is 8 percent,
the water content was 22%.
The coating parameters include: the voltage of the power supply was 60kV, the distance between the tip of the needle tube and the substrate was 5cm, and the vehicle speed, i.e., the substrate feed speed, was 30 m/min.
After coating, the substrate is dried by hot air at 80 ℃ to obtain a finished product.
The microstructure of each coating layer can be seen by microscopy, with particular reference to fig. 9.
Application example 3: relates to the application of a field jet coating system as shown in fig. 1 or fig. 10 to double-sided single-layer coating of nylon cloth by field jet, i.e. to coat one coating layer on each side of the nylon cloth. For this purpose, a set of coating units on both sides of the field jet coating system can participate in the coating, wherein,
the matrix is as follows: NYLON TAFFETA (NYLON TAFFETA);
the coating agents used for coating the substrate were: the Henscman (Huntsman) three-proofing additive comprises the following components in percentage by weight:
5g/L
PBN；
2g/L of 60% acetic acid;
60g/L
R3；
2g/L
EXTENDER XAN。
the coating parameters include: the voltage of the power supply was 50kV, the distance between the tip of the needle tube and the substrate was 15cm, and the vehicle speed, i.e., the substrate feed speed, was 10 m/min.
After coating, the substrate is dried by hot air at 150 ℃ to obtain a finished product.
The nylon yarn fabric coated on the double surfaces is tested according to the AATCC 22-2017 textile water repellency test spraying method, and the water repellency of the nylon yarn fabric can still reach 100 minutes after 30 times of washing.
It is noted that the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and "comprising," and other similar terms, when used in this specification, specify the presence of stated operations, elements, and/or components, but do not preclude the presence or addition of one or more other operations, elements, components, and/or groups thereof. The term "and/or" as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, like reference numerals refer to like elements throughout.
The thickness of elements in the figures may be exaggerated for clarity. It will be further understood that if an element is referred to as being "on," "coupled to" or "connected to" another element, it can be directly on, coupled or connected to the other element or intervening elements may be present. Conversely, if the expressions "directly on … …", "directly coupled with … …", and "directly connected with … …" are used herein, then there are no intervening elements present. Other words used to describe the relationship between elements, such as "between … …" and "directly between … …", "attached" and "directly attached", "adjacent" and "directly adjacent", etc., should be similarly interpreted.
Terms such as "top," "bottom," "above," "below," "over," "under," and the like, may be used herein to describe one element, layer or region's relationship to another element, layer or region as illustrated in the figures. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the figures.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element could be termed a second element without departing from the teachings of the disclosed concept.
It is also contemplated that all of the exemplary embodiments disclosed herein may be combined with each other as desired.
Finally, it is pointed out that the above-described embodiments are only intended for the understanding of the present disclosure and do not limit the scope of protection of the present disclosure. It will be apparent to those skilled in the art that modifications may be made in the foregoing embodiments without departing from the scope of the disclosure.
Claims (10)
1. A field jet coating system for coating a substrate by means of field jet, characterized in that the field jet coating system comprises a coating assembly comprising:
at least one coating mechanism spaced apart from the substrate, the coating mechanism including a coating agent storage mechanism for storing a coating agent and a coating agent ejection mechanism for ejecting the coating agent in the form of a jet and causing it to form droplets; and
a voltage source configured to create a voltage field between the coating mechanism and the substrate, the voltage field generating an electric field force such that the droplets form a population of charged droplets and move toward the substrate under the influence of the electric field force,
wherein the coating agent storage mechanism is configured as an elongated blade beam, the coating agent injection mechanism includes a needle pipe member having an air flow passage and a coating agent passage constituted by a needle pipe, the air flow passage being in fluid communication with the air flow supply member, the coating agent passage being in fluid communication with the blade beam, the coating agent storage mechanism being configured as an elongated blade beam, the coating agent injection mechanism including an air flow supply member for supplying an air flow, and a coating agent supply member for supplying a coating agent to the needle pipe member via the blade beam, the coating agent injection mechanism forming the liquid droplets under the action of a coating agent supply pressure of the coating agent supply member and/or a negative pressure of the air flow.
2. The field jet coating system of claim 1, further comprising a manipulation mechanism configured to move the coating mechanism to adjust a relative position of the ejection orifice of the coating agent ejection mechanism to the substrate or a pointing direction of the ejection orifice of the coating agent ejection mechanism or a distance from the ejection orifice of the coating agent ejection mechanism to the substrate.
3. The field jet coating system of claim 1, further comprising a voltage regulation component configured to regulate an output voltage of a voltage source.
4. The field jet coating system of claim 1, wherein at least one coating mechanism is disposed on only one side of the substrate; or at least one application member is arranged on both sides of the substrate, and the application members on both sides of the substrate are arranged opposite to each other or offset.
5. The field jet coating system of claim 1, wherein the needle tubing components are arranged on the knife beam at equal intervals from each other.
6. The field jet coating system of claim 1, wherein said needle cannula component comprises a central coating agent passage and said needle cannula component comprises a gas flow passage annularly disposed about said central coating agent passage or a plurality of gas holes or slots disposed in a distributed manner about said central coating agent passage, said gas holes or slots forming a gas flow passage.
7. The field jet coating system of claim 1, wherein the air flow supply component is configured as an air pump for generating compressed air.
8. The field jet coating system of claim 1, wherein the coating agent supply component is configured as a metering pump for dosing the coating agent.
9. The field jet coating system of claim 1, wherein one pole of the voltage source is connected to the coating mechanism and the other pole of the voltage source is connected to the substrate or the substrate is grounded.
10. The field jet coating system of claim 1, wherein the voltage of the voltage source is 10-60 kV.
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| CN202110899193.9A CN113477429A (en) | 2021-08-06 | 2021-08-06 | Field jet coating system and field jet coating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011398A1 (en) * | 2021-08-06 | 2023-02-09 | 长胜纺织科技发展(上海)有限公司 | Method for dyeing fabric by means of field jet and system for dyeing fabric by means of field jet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1209653A (en) * | 1968-07-02 | 1970-10-21 | Air O Static Inc | Apparatus for electrostatic spray coating |
| US3645447A (en) * | 1968-12-31 | 1972-02-29 | Electrogasdynamics | Electrostatic paint spray system |
| US20120321818A1 (en) * | 2011-06-20 | 2012-12-20 | Umino Yuji | Method and device for forming piezoelectric/pryoelectric film |
| CN105188952A (en) * | 2013-03-11 | 2015-12-23 | 卡莱流体技术有限公司 | System and method of producing a coating with an electrostatic spray |
| CN105473234A (en) * | 2013-08-13 | 2016-04-06 | 萨姆斯技术公司 | Sprayer for a liquid coating product and spraying facility comprising such a sprayer |
| CN108097487A (en) * | 2018-02-12 | 2018-06-01 | 安徽江淮汽车集团股份有限公司 | A kind of powder coatings system |
| CN108940629A (en) * | 2018-07-13 | 2018-12-07 | 武汉理工大学 | Fine machine is electrostatically sprayed process unit |
| WO2020198322A1 (en) * | 2019-03-25 | 2020-10-01 | Carlisle Fluid Technologies, Inc. | Electrostatic coating system and method |
-
2021
- 2021-08-06 CN CN202110899193.9A patent/CN113477429A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1209653A (en) * | 1968-07-02 | 1970-10-21 | Air O Static Inc | Apparatus for electrostatic spray coating |
| US3645447A (en) * | 1968-12-31 | 1972-02-29 | Electrogasdynamics | Electrostatic paint spray system |
| US20120321818A1 (en) * | 2011-06-20 | 2012-12-20 | Umino Yuji | Method and device for forming piezoelectric/pryoelectric film |
| CN105188952A (en) * | 2013-03-11 | 2015-12-23 | 卡莱流体技术有限公司 | System and method of producing a coating with an electrostatic spray |
| CN105473234A (en) * | 2013-08-13 | 2016-04-06 | 萨姆斯技术公司 | Sprayer for a liquid coating product and spraying facility comprising such a sprayer |
| CN108097487A (en) * | 2018-02-12 | 2018-06-01 | 安徽江淮汽车集团股份有限公司 | A kind of powder coatings system |
| CN108940629A (en) * | 2018-07-13 | 2018-12-07 | 武汉理工大学 | Fine machine is electrostatically sprayed process unit |
| WO2020198322A1 (en) * | 2019-03-25 | 2020-10-01 | Carlisle Fluid Technologies, Inc. | Electrostatic coating system and method |
Non-Patent Citations (2)
| Title |
|---|
| （英）A.H.勒菲沃，（英）D.R.鲍拉尔著: "《燃气涡轮发动机燃烧》", 30 June 2016 * |
| 解恩泽，王广铨，邵福林主编: "《化工技术人员综合知识手册》", 30 September 1990 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011398A1 (en) * | 2021-08-06 | 2023-02-09 | 长胜纺织科技发展(上海)有限公司 | Method for dyeing fabric by means of field jet and system for dyeing fabric by means of field jet |
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Effective date of registration: 20211216 Address after: 201613 area B, building 2, 318 Lianyang Road, Songjiang District, Shanghai Applicant after: NEWTECH TEXTILE TECHNOLOGY DEVELOPMENT (SHANGHAI) Co.,Ltd. Address before: 201613 area B, building 2, 318 Lianyang Road, Songjiang District, Shanghai Applicant before: NEWTECH TEXTILE TECHNOLOGY DEVELOPMENT (SHANGHAI) Co.,Ltd. Applicant before: Zhong Bowen |
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