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Double-faced fallen curtain coating technology and application and device thereof

A film device, double-sided technology, applied in the direction of spray device, liquid spray device, film, etc., can solve the problems of poor adaptability, low coating efficiency, inability to adjust the angle of the substrate, etc., to improve efficiency, quantitative accurate and uniform coating , the effect of strong adaptability

Active Publication Date: 2018-05-18
BEIJING ORIGIN WATER FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing curtain coating methods are mostly single-sided coating, and the coating efficiency is low
In addition, the coated curtains are all vertically coated, and the substrate is perpendicular to the curtain, so the angle of the substrate cannot be adjusted during coating, and the adaptability is poor

Method used

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  • Double-faced fallen curtain coating technology and application and device thereof
  • Double-faced fallen curtain coating technology and application and device thereof
  • Double-faced fallen curtain coating technology and application and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a double-sided curtain coating process, the substrate used is a corrugated polyester non-woven fabric, and the coating material is a polymer solution (polyvinylidene fluoride / dimethyl Formamide (DMF), the coating material is placed in the feeding tank 11, heated to 40-80°C to form a coating liquid, the viscosity of the coating liquid is 5000-80000cps. The angle between the base material to be coated and the horizontal plane described in this embodiment is 90°, and two groups of spraying units are arranged horizontally, such as figure 1 As shown, the distance between the discharge slits 15 of the two groups of coating units is 4 mm. The distance between the discharge slits 15 of the two groups of coating units is not limited thereto, and can be adjusted according to the spraying speed of the coating liquid, and can be 2-40 mm, preferably 4-20 mm.

[0062] The corrugated polyester non-woven fabric substrate is placed in the unwinding mechanism 21...

Embodiment 2

[0066] This embodiment provides a double-sided curtain coating process. The substrate used is polyester non-woven fabric, and the coating material is a polymer solution (polyvinylidene fluoride / dimethylacetamide) for preparing ultra-microfiltration membranes. DMAc), the coating material is placed in the feeding tank 11 and heated to 40-80° C. to form a coating liquid, the viscosity of which is 5000-80000 cps. The angle between the substrate to be coated and the horizontal plane in this embodiment is 60°, two groups of spraying units are relatively arranged on both sides of the substrate, and perpendicular to the surface of the substrate, the two groups of spraying units It is 30° to the horizontal, and the distance between the discharge slits 15 of the two groups of coating units is 4 mm. see figure 2 , which is a schematic structural diagram of the device used in the double-sided curtain coating process of this embodiment.

[0067] Arrange the substrate polyester non-woven...

Embodiment 3

[0070]This embodiment provides a double-sided curtain coating process. The substrate used is polyester non-woven fabric, and the coating material is a polymer solution (polyvinylidene fluoride / N-methylpyrrolidone) for preparing ultra-microfiltration membranes. NMP), the coating material is placed in the feeding tank 11, heated to 40-80°C to form a coating liquid, the viscosity of the coating liquid is 5000-80000cps. In this embodiment, the angle between the substrate to be coated and the horizontal plane is 45°, two groups of spraying units are relatively arranged on both sides of the substrate, and perpendicular to the surface of the substrate, the two groups of spraying units It is 45° to the horizontal, and the distance between the discharge slits 15 of the two groups of coating units is 4 mm. see image 3 , which is a schematic structural diagram of the device used in the double-sided curtain coating process of this embodiment.

[0071] Arrange the substrate polyester no...

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Abstract

The invention relates to the technical field of curtain type coating, in particular to a double-faced fallen curtain coating technology and application and device thereof. According to the double-faced fallen curtain coating technology, coating liquid is jetted on the surfaces of double faces of a base material, and the curtains formed by the coating liquid are perpendicular to the surfaces of thebase material; and the jetting speed of the coating liquid on one face of the base material is 2-500 m / min, the jetting speed of the coating liquid on the other face of the base material is 2-500 m / min, the moving speed of the base material is 2-500 m / min, and the jetting distance between the double faces of the base material is 2-40 mm. The double-faced fallen curtain coating technology is mainly applied to preparation of separating membranes, coating is conducted on the double faces of the base material correspondingly, the jetting speed of the coating liquid on the two sides of the base material is regulated correspondingly, stable coating is achieved by being matched with the coating distance, and thus coating in different thicknesses can be achieved on the two sides of the base material according to practical demands. Coating in different inclination angles can be achieved on the base material by regulating and controlling the jetting speeds and being matched with the coating distance.

Description

technical field [0001] The invention relates to the technical field of curtain coating, in particular to a double-sided curtain coating process and its application and device. Background technique [0002] Existing coating technology applied to separation membranes in the water treatment industry is mostly single-sided scraper coating. The principle of scraper coating is relatively simple. Excess paint is scraped off. However, the doctor blade coating method has high requirements on the substrate, and is not suitable for coating on rough surface substrates; the coating surface has poor uniformity and uneven thickness, which affects the performance stability and service life of the film; and The viscosity of the coating solution is limited. The use of high-viscosity coating solution has obvious defects such as pinholes and craters. The use of low-viscosity coating solution has serious penetration, and it is easy to penetrate the substrate and affect the performance of the fi...

Claims

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Application Information

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IPC IPC(8): B05B9/04B05B12/08B05B12/12B05B13/02B01D67/00
CPCB01D67/0002B01D2323/26B05B9/0403B05B12/08B05B12/084B05B12/085B05B12/122B05B12/124B05B13/0278
Inventor 陈亦力冯春磊丑树人徐航代攀
Owner BEIJING ORIGIN WATER FILM TECH
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