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Radiation-cured coatings

A radiation curing and coating technology, applied in coatings, devices for coating liquid on the surface, discharge tubes, etc., can solve the problems of increased uniformity and poor risk of damage along the coating, and achieve the goal of preventing delamination Effect

Active Publication Date: 2011-08-24
凯姆梵克有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The risk of being damaged when unrolled is further exacerbated by poor uniformity along the coating

Method used

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  • Radiation-cured coatings
  • Radiation-cured coatings
  • Radiation-cured coatings

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0056] In this example, curing was performed using a flat-panel magnetron low-pressure plasma source consisting of an Edwards 75mm flat-panel magnetron and an MDX DC power supply; the acrylate transport source was located between the plasma source and the substrate in the process volume, and This transport leaves the plasma source towards the substrate. The acrylate used was tripropylene glycol diacrylate TRPGDA. For deposition and curing, the substrate is static. A heated single-hole precursor transfer tube as Figure 5a , the way of 5b is arranged before the source towards the substrate. The tube was heated for 8 minutes using a variable heating power supply (pulse space modulation, 10% duty cycle) at 200 watts at 240 volts. Cathode uses 6x10 -2 mbar residual ambient air at 200mA operated in constant current mode. 8 ml of material was delivered in 3 seconds and the resulting substrate was coated with cured acrylate with very good adhesion.

example 2

[0058] In this example, using two double-plate magnetrons, the plasma is Figure 6 way to transfer between them. Power is supplied by a DC magnetron power supply unit. The PID-controlled heated tube had an inner baffle, and the precursor TRPGDA was delivered to the heated tube on the opposite side of the moving sheet. A 30 mm slot machined in the tube towards the moving sheet provides the output precursor bundle. With over 200 watts of DC power on the two 2 inch diameter cathodes, these were placed 60 mm above the 150 mm coating drum carrying the moving sheet. In Argon 2x10 -20.2 ml precursor was transported in 1.5 min through a 20 mm slot positioned 50 mm away from the sheet at a pressure of mbar and at a 20 mm diameter heated transfer tube fitted in the 25 mm space between the cathodes Grooves, these precursors are aligned to intersect a large proportion of the electron flux at the substrate surface from the two cathodes. The substrate was coated at 30 meters per minute...

example 3

[0060] In this example, use Figure 5a and 5b installation. The plasma source was a 4 inch sputter cathode with a very weak magnetic field and a 6 inch (oversized) reaction plate. The precursor source consisted of a heated precursor delivery tube (3 / 4 inch diameter) with a 4 mm exit hole in front of the 6 inch cathode surface and was centrally mounted with the exit hole facing the sheet 20 mm below the cathode, the precursor The volume source is 30 mm from the sheet surface and uses a 3x10 -1 Oxygen / nitrogen atmosphere at mbar. The cathode was run at 150 watts and the tube was heated to 260°C as the liquid acrylate was transported 4 inches away from the 4 mm tube outlet and 180° opposite the exit hole. The acrylate was delivered through the metering needle valve and the resulting coating was a well cured acrylate deposit with excellent adhesion and good uniformity in the machine and cross directions.

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Abstract

A process for coating a substrate comprising condensing a radiation curable material on a substrate and curing it using an electron flux 6' with energy between 6.5eV and 300eV. The electron flux 6' is directed at the substrate (2) either simultaneously or sequentially with delivery of the curable material (5'). Curing is preferably initiated spatially and temporally concurrently with delivery of the material to the substrate. The electron flux is preferably generated using a low pressure gas plasma source with a driving voltage negative relative to the local voltage conditions. The low pressure gas plasma (6') is preferably magnetically enhanced and, for example, incorporates a magnetron.

Description

technical field [0001] The present invention relates to a coated substrate and an apparatus and process for coating the substrate. Background technique [0002] Films with enhanced barrier properties to oxygen or other gases or odors, or to water vapour, are produced by depositing alternating layers of cured polymers and metals or compounds onto a web substrate using processes such as vacuum deposition. These films are used for packaging oxygen- or moisture-sensitive foods, encapsulating gas- or moisture-sensitive components, and a variety of other functional applications requiring barrier properties. Films have also been fabricated with enhanced holographic effects, isotropic light scattering or color shifting by depositing alternating transparent or translucent layers of cured polymer and metal onto sheet substrates. [0003] It is known to use vacuum deposition to deposit cured polymer layers onto sheet substrates. However, existing continuous processes for vacuum conde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/06B05D7/24B05D7/04H01J37/077
CPCB05D1/60B05D3/147B05D1/62B05D3/068H01J2237/316B05D2252/02B05D7/04H01J37/077B05D2350/60
Inventor J·托品D·安东尼
Owner 凯姆梵克有限公司
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