Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
1998-11-20
2002-08-20
Jagannathan, Vasu (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C523S160000, C524S039000, C428S914000
Reexamination Certificate
active
06437023
ABSTRACT:
DESCRIPTION
A liquid pressure pattern-transferring ink, a liquid pressure pattern-transferring film, a liquid pressure pattern-transferred article and a method of transferring a print pattern on an objective body under a liquid pressure
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. 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 the 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.
The print pattern has a design provided as a collective form of dots on the pattern-transferring film by a gravure printing method. If the print pattern thus provided on the pattern-transferring film is in a dry state, then it is required to restore an adhesive 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 general, the liquid pressure pattern-transferring ink comprises a resin ingredient serving as a binder of ink and being to become a print coat base layer, a pigment to take charge of color of the ink and a plasticizer to adjust a hardness of the resin when the ink is swelled or dried.
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 remaining weight % in addition to the aforementioned ingredients.
The nitrocellulose serves to adjust a hardness of the resin ingredient so as to increase its hardness, but since the hardness of the resin in itself is relatively high, the print pattern disadvantageously fails to be transferred while it is smoothly extended due to a shortage of the extensibility of the ink. With the print pattern being fully not extended, it cannot be closely adhered to the objective body along the surface thereof, which causes the portion of the print pattern to be not adhered thereto so that a pinhole or pinholes are formed therein.
As aforementioned, the dry ink which forms the print pattern provided on the pattern-transferring film retrieves its adhesive property by being dissolved by an activator. The present applicant has proposed an activator composite having a fundamental ingredient of alkyd resin suitably used for dissolving the dry ink on the pattern-transferring film having the print pattern printed thereon by the printing ink having a fundamental ingredient of alkyd (see JP8-238897 or Japanese Patent Application Laying Open No. 238,897/1996). This activator composite comprises a resin ingredient having an alkyd resin as a fundamental component, a solvent and a plasticizer and the resin ingredient is composed of a short-oil alkyd resin having a cellulose acetate butyrate (cellulose acetobutyrate) added thereto.
The cellulose acetate butyrate in this activator composite is softer than the nitrocellulose which is one of the ingredients of the aforementioned ink, but harder than the short-oil alkyd resin which is another resin ingredient of the ink and serves to activate the dry ink so as to provide to the ink a full softness enough to extend the print pattern on the pattern-transferring film following a surface of fine roughness of the objective body while maintaining a hardness of certain degree and an apparent dryness of the alkyd resin even though the ink in itself is short of extensibility. In addition thereto, the cellulose acetate butyrate of the activator composite has a lower hygroscopicity and therefore serves to prevent a coated film of the print pattern transferred onto the objective body from being floated off or removed out of the surface of the objective body due to bubbles because of no absorption of water by the printing ink. Thus, the activator composite including the cellulose acetate butyrate can reduce the disarrangement of the transferred pattern due to the partial dissolution of the ink or the shortage of the dissolution of the ink when the dry ink is treated by the activator and also can reduce the floating off of the coated film due to bubbles. As noted from the foregoing, this activator composite can suitably activate the print pattern on the pattern-transferring film.
However, even though such an activator is used, a plain transferred pattern cannot be sometimes obtained because the disarrangement of the print pattern due to the partial dissolution of the printing ink or the shortage of dissolution of the printing ink cannot be fully prevented and also because there occurs the phenomenon of the transferred pattern being blurred due to the original state of the ink dots broken by the excessive dissolution of the printing ink. Especially, the excessive dissolution of the printing ink occurs when too much amount of the activator composite is coated and is caused to lose a sharpness (clearness) of the pattern transferred to the objective body. Thus, it will be noted that the amount of the activator composite to be coated should not be excessive in view of the sharpness of the transferred pattern.
The activator essentially serves to swell the dry printing ink and restore the adhesive property thereof. Thus, it is difficult to prevent the disarrangement of the transferred pattern due to the partial dissolutio
Otaki Nobuyuki
Sugiyama Misao
Yamamoto Kazuhiro
Cubic Co. Ltd.
Jagannathan Vasu
Pearne & Gordon LLP
Shosho Callie E.
LandOfFree
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