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Digital thermal binder and powder printing

A thermal printing head, digital printing technology, applied in printing, ink transfer from original manuscript, copying/marking method, etc., can solve the problems of hours-consuming, low productivity of 3D printing machine, not too transparent, etc., and achieve cost saving Effect

Active Publication Date: 2015-11-04
CERALOC INNOVATION AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: they are not very transparent and the decorative pattern is covered with a layer of gray which interferes with the printed pattern
3D printing machines have very low productivity and the build of even small objects can take hours
[0105] Known methods are not suitable for producing high-quality multicolor images on building panels and especially on floor panels where UV-resistant pigments have to be used and where the image has to be incorporated into the wear-resistant surface floor paneling

Method used

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  • Digital thermal binder and powder printing
  • Digital thermal binder and powder printing
  • Digital thermal binder and powder printing

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0288] Example 1 - Dry Fiber Based Ink

[0289] The dry ink powder was prepared by mixing 20% ​​by weight spray-dried melamine formaldehyde resin particles, 20% dark brown pigment and 60% pine wood fibers (average length about 0.2mm and thickness about 0.05mm) have to. The mixture was applied as a 1 mm thick layer on the steel belt by means of a spreading device. Thereafter the powder mixture is heated and moisture is applied by steam from deionized water. The mixture is dried by hot air, resulting in a hard and stable powder-based surface layer with a semi-cured melamine binder. The dry layer was removed from the belt by scraping and the dry wood particles coated with pigment and melamine resin were ground and sieved into dry ink colorants of a size similar to that of individual wood fibers. A dry ink comprising a colorant is obtained with a wood fiber body and a surface covered by pigment bound to the fibers by a semi-cured melamine resin.

example 2

[0290] Example 2 - Digital Printing Using Thermal Printheads

[0291] A high density fiber (HDF) core of 8 mm was sprayed with small droplets of deionized water and contained 300 g / m of wood fibers, melamine particles, brown pigments and alumina particles 2The powder mixture is applied to the HDF core board by spreading equipment. The mixture was again sprayed with deionized water containing a release agent and dried by infrared lamps to obtain a hard stable, partially semi-cured powder-based surface bonded to the HDF core and having a beige base color. Panels with a stable powder surface are placed on a conveyor belt and moved under a digital Kyocera piezoelectric print head. Dry ink as described above in Example 1, comprising a darker brown than the basic beige powder-based surface, in a second step utilizing a dry ink application station comprising a hopper and a 5 cm diameter rotating and oscillating engraved roller To be sprinkled over the entire powder-based surface. ...

Embodiment

[0293] 1. A method of forming a digital print (P) on a surface (2), wherein said method comprises the steps of:

[0294] - applying a colorant (7) to said surface (2);

[0295] - bonding a portion of said colorant to said surface (2) with a binder (11); and

[0296] • Removal of unbound colorant (7) from said surface (2) such that a digital print (P) is formed by said bound colorant (7).

[0297] 2. The method as in embodiment 1, wherein the colorant (7) comprises a pigment (12) mixed with the binder (11).

[0298] 3. The method as in embodiment 1 or 2, wherein the binder (11) comprises a thermosetting resin.

[0299] 4. The method according to any one of the preceding embodiments, wherein the binder (11) comprises a thermoplastic resin.

[0300] 5. The method according to any one of the preceding embodiments, wherein the binder (11) is a powder.

[0301] 6. The method as claimed in any one of the preceding embodiments, wherein the surface (2) is a paper layer or a foil. ...

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Abstract

The disclosure relates to a method of forming a digital print on a surface (2) by applying powder of dry ink (15) including colourants (7) on the surface, bonding a part of the dry ink (15) powder to the surface(2) by a digital heating print head (80) such that the digital print is formed by the bonded dry ink colourants (7) and removing non- bonded dry ink (15) from the surface (2).

Description

technical field [0001] The present invention relates generally to the field of digitally formed decorative surfaces for building panels such as floor and wall panels. The present invention relates to a method for applying and combining powder-based colorants on a surface to form a digital print. [0002] Application field [0003] Embodiments of the invention are particularly suitable for application in floors which may be formed from floor panels comprising a core or body, a decorative layer and a preferably transparent wear resistant structural layer above the decorative layer. Preferred examples are traditional laminate floors, powder based floors, wooden floors, plastic based LVT floors and ceramic tiles. Therefore, the following description of the technology, the problems of the known technology and the objects and features of the invention will be directed, as non-limiting examples, mainly to this field of application and in particular to floors like conventional lamin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/398B41J2/32B41M5/025
CPCB41J2/475B41M5/398
Inventor D·佩尔万T·佩尔万
Owner CERALOC INNOVATION AB
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