Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
1998-12-17
2003-04-22
Bell, Mark L. (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Marking
C106S031720, C106S031690, C428S195100
Reexamination Certificate
active
06551392
ABSTRACT:
TECHNICAL FIELD
This invention pertains to a liquid pressure pattern-transferring ink including an alkyd resin as a fundamental ingredient used for transferring and printing appropriate print patterns such as wood grain patterns, marble patterns or other patterns by using a liquid pressure on an objective article (a body to which the print pattern is to be transferred) having a three-dimensional surface such as a curved surface or the like. More particularly, this invention pertains to an improvement on a liquid pressure pattern-transferring ink which is suitably useful for printing print patterns to be transferred on an objective article such as car bodies which tend to be exposed to severe atmospheres such as sunlight, weather and so on. Furthermore, this invention pertains to an improvement on a liquid pressure pattern-transferring ink to be used for printing a print pattern on a surface of an objective article exposed to such severe atmospheres and including an alkyd resin as a fundamental component.
Furthermore, this invention pertains to a pattern-transferring film having a print pattern printed thereon by the liquid pressure pattern-transferring ink, a liquid pressure pattern-transferred article having a predetermined print pattern transferred from the pattern-transferring film by using a liquid pressure and a method of transferring a print pattern on an objective article by using the pattern-transferring film.
TECHNICAL BACKGROUND
A method of transferring onto an objective body or article (a body to which a print pattern is to be transferred ) by using a liquid pressure a print pattern on a pattern-transferring film floated on a liquid surface has been used for printing the print pattern on the objective body having a three-dimensional surface such as a curved surface and so on. The liquid to be used may be typically water and may be a liquid other than the water if it has no trouble for the liquid pressure pattern-transferring operation.
This liquid pressure pattern-transferring method is one in which a liquid-soluble or liquid-swelling pattern-transferring film having a predetermined print pattern of no liquid solution provided thereon is floated on a surface of a liquid flowing within a transferring bath and is made swelled by the liquid and then the objective, body is immersed into the liquid within the transferring bath in a manner faced to the pattern-transferring film and has the print pattern transferred from the pattern-transferring film by using a liquid pressure.
In case that a print pattern should be printed on an objective body to be used in a place such as a building room or a car room where it is never exposed to an outdoor atmosphere, a printing ink is not required to have a weather resistance, but in case that the print pattern should be printed on an objective body such as a car hood or a car panel including a fender or the like exposed to an outdoor atmosphere, the printing ink is required to have a weather resistance so that the color of the transferred pattern neither changes nor fades while it is exposed to the outdoor atmosphere.
In general, the printing ink for printing the print pattern on the pattern-transferring film to be used for the liquid pressure transferring method comprises a resin serving as binder, a plasticizer serving to adjust a hardness of the resin, a pigment serving to provide a color thereto and a solvent serving to solve the resin into a liquid. The print pattern to be used for being transferred under a liquid pressure may be formed by a gravure printing method by using a single or a plurality of inks among yellow, red, blue, white and black inks while they are of a primary color or of a blended color so that a variety of colors appear where dots of the primary or blended color are superposed one on another.
A printing ink of prior art has used a relatively inexpensive pigment having a sharpness of its color and more particularly has a phthalocyanine blue as blue pigment, an anatase type titanium white as white pigment, a carbon black as black pigment, a permanent red as red pigment and a disazo yellow as yellow pigment.
Such a prior art printing ink has no problem when it is used for printing the print pattern on the surface of the indoor objective body by the liquid pressure pattern transferring method, but it is confirmed that when the prior art printing ink is used for printing the print pattern on the surface of the outdoor objective body exposed to severe outdoor atmospheres such as sunlight, weather and so on, the color of the pattern transferred thereon tends to change or fade.
Imagining that the color of the transferred pattern changing or fading was caused by the properties of the pigment in itself of the printing ink, the applicant made a weather resistance test on various metal test pieces having printing inks of various colors daubed by using a sunshine weather meter based on JIS (Japanese Industrial Standard) so as to confirm the weather resistance of the pigments included in the prior art printing inks. As a result, it was confirmed that the colors of the phthalocyanine blue as blue pigment, the anatase type titanium white as white pigment and the carbon black as black pigment neither changed nor faded even in more than 3000 hours, but the color of the permanent red as red pigment and the disazo yellow as yellow pigment changed or faded in about 1000 and 500 hours, respectively. It will be noted that the color of the pattern transferred from the print pattern on the pattern transferring film formed by using the prior art printing ink changed or faded because the pigments had a poor weather resistance.
The outdoor objective article such as a car panel including a car bonnet, a fender and so on is required to have a weather resistance corresponding to a life span of the car. A weather resistance of about 3000 hours determined by a weather resistance test using the sunshine weather meter will be normally enough for the car panel, but with the prior art printing ink used, the entire color of the transferred pattern is unbalanced due to the lower weather resistance of the red and yellow printing inks and as a result, the color of the transferred pattern on the outdoor objective article tends to change or fade.
On the other hand, the print pattern has a design provided as a collective form of dots on the pattern-transferring film by a gravure printing method as aforementioned. If the print pattern thus provided on the pattern-transferring film is in a dry state, then it is required to restore an adhesion property necessary for the pattern-transferring operation by returning from the dry state to an activated state by using an activator composite before it is transferred on the objective body.
In this case, the print pattern is required to have such an extensibility as allows the print pattern to be closely adhered to the objective body along the surface thereof. If a part of the ink of the print pattern is too much dissolved, the design pattern transferred and formed on the objective body tends to be destroyed. Reversely if a part of the printing ink is insufficiently dissolved, the print pattern will be transferred while a lump of ink remains. If the whole ink is excessively dissolved, then an arrangement of ink dots will be broken so that the transferred design pattern will be made blurred. Thus, such phenomena have to be prevented. In the description, the two former phenomena will be referred to as “a disarrangement of the transferred pattern” while the last phenomenon will be referred to as “a blur of the transferred pattern”.
In a liquid pressure pattern-transferring ink of the prior art including an alkyd resin as a fundamental component, the resin ingredient is composed of a short-oil alkyd resin of 2 to 15 weight % having a nitrocellulose of 3 to 20 weight % added thereto, the plasticizer is composed of a dibutyl phthalate of 2 to 7 weight % or the like and the liquid pressure pattern-transferring ink comprises a color pigment of 5 to 40 weight % and a solvent of the residue weight % in addition to the afore
Otaki Nobuyuki
Sugiyama Misao
Yamamoto Kazuhiro
Bell Mark L.
Cubic Co. Ltd.
Faison Veronica F.
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