Indian Patents. 205738:NOVEL SUBSTRATES AND PROCESS FOR DIRECT PRINTING THAT THE PROVISIONAL SPECIFICATION RELATING TO THIS INVENTION IS FILED WITH THIS APPLICATION

Title of Invention	NOVEL SUBSTRATES AND PROCESS FOR DIRECT PRINTING THAT THE PROVISIONAL SPECIFICATION RELATING TO THIS INVENTION IS FILED WITH THIS APPLICATION
Abstract	1. Substrate for ink jet printing with hydrophobic solvent based inks comprising a meshed member laminated on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns, the ink jet printing with hydrophobic solvent based ink being carried out on the opposite unlaminated side of the meshed member ]

Full Text	FORM 2 THE PATENTS ACT, 1970 (39 of 1970) As amended by the Patents (Amendment) Act, 2005 & The Patents Rules, 2003 As amended by the Patents (Amendment) Rules, 2005 COMPLETE SPECIFICATION (See section 10 and rule 13) TITLE OF THE INVENTION Substrate for ink jet printing with hydrophobic solvent based ink. APPLICANTS Name : Arrow Coated Products Limited Nationality : Indian Company Address : 5D Laxmi Industrial Estate, New Link Road, Andheri West, Mumbai 400053, Maharashtra, India PREAMBLE TO THE DESCRIPTION The following specification particularly describes the nature of this invention and the manner in which it is to be performed: ORIGINAL 894/MUM/2001 GRANTED 22-6-2005 FIELD OF INVENTION This invention relates to a substrate for ink jet printing with hydrophobic solvent based ink. This invention also relates to a process for ink jet printing with hydrophobic solvent based ink on a substrate. PRIOR ART Ink jet printing is carried out with aqueous or solvent based inks. If textile substrates such as woven or non-woven fabrics or cloths or jute or blends thereof which are meshed or perforated by the very nature thereof or non-textile substrates such as plastics sheets which are meshed or perforated, are directly ink jet printed, the ink seeps through the substrates due to the perforations or gaps in such substrates resulting in poor quality printed images besides other disadvantages such as wastage of inks. US Patent No 4,725,849 describes a process for ink jet printing cloth using aqueous inks, wherein prior to printing, the cloth is coated with a layer of water soluble or hydrophilic resin containing solution which is moist and has a viscosity of 1000 - 1500 cp at 25°C. The ink receiving layer absorbs the ink quickly and prevents feathering and seepage of the ink through the perforations or gaps of the substrate. The ink is fixed on the substrate by ironing followed by removing the ink receiving layer with a neutral detergent and drying the printed substrate. The ink receiving layer is formed by dissolving or dispersing one or more polymers in a solvent such as water. The polymers include compounds such as water soluble or hydrophilic resins which may be natural or synthetic, such as albumin, gelatin, casein, starch, cationic starch, gum arabic or sodium alignate or water soluble polyamide, polyacrylamide, polyvinylpyrrolidone, quaternary salts of polyvinylpyrrolidone, polyethyleneimine, polyvinylpyridinium halides, melamine resin, polyurethane, corboxymethylcellulose, polyvinyl alcohol, cation-modified polyvinyl alcohol, water soluble polyester or poly(sodium acrylate). For the purpose of reinforcing the ink receiving material and/or enhancing its adhesion to the substrate there may optionally be used jointly a resin such as latex, polyvinyl formal, polymethylmethacrylate, polyvinyl-butyral, polyacrylonitrile, polyvinyl-chloride, polyvinyl-acetate, phenolic resin, or alkyd resin. Good quality images are reported to have been printed with the above process. Besides, porosity and breathability of the printed substrate is restored due to removal of the ink receiving layer. Because of the ironing step, the process is, however, time consuming and tedious to carry out and it is also energy consuming. US Patent No 6291023 teaches the use of a coating composition on textile substrates so as to improve the quality of printing thereon generally by employing ink jet printing with aqueous inks. The coating composition consisits of a mixture of azetiddinium and guanidine polymers, a copolymer of azetidiniurn and guanidine monomers and a poly ( amino amide) -epichlorohydrin resin. The coating composition continues to remain on the substrates after the printing thereby rendering the substrate non-porous and non-breathable. Besides the coating composition is expensive. OBJECTS OF INVENTION An object of the invention is to provide a substrate for ink jet printing with hydrophbic_Solvent based ink which gives good printed images with breathability to the substrate. Another object of the invention is to provide a process of ink jet printing with hydrophobic solvent based ink on a substrate, which gives good printed images with breathability to the substrate. Another object of the invention is to provide a process of ink jet printing with hydrophobic solvent based ink on a substrate, which is simple, convenient and less time consuming to carry out. Another object of the invention is to provide a process of ink jet printing with hydrophobic solvent based ink on a substrate, which is less energy consuming and is economical. DESCRIPTION OF THE INVENTION According to the invention there is provided a substrate for ink jet printing with hydrophobic solvent based inks comprising a meshed member laminated on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns, the ink jet printing with hydrophobic solvent based ink being carried out on the opposite unlaminated side of the meshed member. The meshed member may be textile materials such as woven or non-woven fabrics or cloths or polyester or jute or hessian or blends thereof. Alternatively, the meshed member may be non - textile materials such as meshed or perforated plastic sheets. The water soluble film may have any thickness that is sufficient to prevent seepage of inks. Preferably, the water soluble film is of 10 to 75 microns in thickness and still preferably between 15 to 50 microns in thickness. According to the invention there is also provided a process for ink jet printing with hydrophobic solvent based ink on a substrate comprising first laminating a meshed member on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns so as to form the substrate followed by ink jet printing the substrate with hydrophobic solvent based ink on the opposite unlaminated side thereof and washing and drying the printed substrate. •The meshed substrate is laminated with the water soluble film on one side thereof by any known method such as heat or wet sealing or using water soluble adhesives such as poly vinyl acetate derivatives, acrylic derivatives, guar gum or carboxymethylcellulose or gelatin glues. The water soluble film may be cold or hot water soluble and may be made of acrylic acid polymers, acrylic ester polymers, acrylic acid copolymers, acrylic ester copolymers, polymers of acrylic acids and esters, cross linked polyvinyl alcohols, cross linked cellulose derivatives, ethyl cellulose, nitrocellulose, cellulose butyrate, cellulose acetate butyrate, ethylene vinyl polyalcohol, ethylene vinyl acetate, acrylic emulsion, polyvinylchloride emulsion, polyvinylidene dichloride emulsion, polyvinyl butyral, natural or synthetic waxes, polyurethanes, modified polyvinyl alcohols or silicone based polymers. According to the invention there is also provided printed substrate obtained by the process described above. During printing due to lamination of the meshed member the perforations or gaps in the meshed member are plugged by the water soluble film. Therefore the ink does not flow through the perforations or gaps and result in wastage. At the same time due to the hydrophobic nature of the solvent based ink, it does not get absorbed by the water soluble film thereby facilitating absorption of the entire ink by the meshed member thereby ensuring high quality printed images on the meshed member. Ink jet printing may be carried out on the substrate immediately after lamination or after a storage period. The following experimental examples are illustrative of the invention but not limitative of the scope thereof. Example 1 100% Cotton cloth (10 M x 1 M) was laminated on one side thereof with a water soluble film of 20 microns thickness ( being sold by us under the brand name EC 200 WSF) by heat sealing to from the substrate which was printed on the opposite unlaminated side thereof using an ink jet printer Vutek -USA using a hydrophobic solvent based ink (Vutek of Vutek- USA). The printed substrate was washed with water and dried with a hot air drier. Example 2 100% Cotton cloth (10 M x 1 M) was laminated on one side thereof with a water soluble film of 25 microns thickness ( being sold by us under the brand name EC 250 WSF) by wet sealing to form the substrate which was printed on the opposite unlaminated side thereof using an ink jet printer Vutek -USA using a hydrophobic solvent based ink (Vutek of Vutek -USA). The printed substrate was washed with water and dried with a hot air drier. Example 3 Perforated polyvinyl chloride sheet (5 M x 1M) was laminated on one side thereof with a water soluble film of 15 microns thickness (being sold by us under the brand name EC 150 WSF) using water soluble adhesive (Fevicol of Parekh Industries, Mumbai) to form the substrate which was printed on the opposite unlaminated side thereof using an ink jet printer Vutek -USA using a hydrophobic solvent based ink (Vutek of Vutek- USA). The printed substrate was washed with an aqueous solution of Surf Excel (detergent) of Hindustan Lever Ltd, Mumbai followed by drying with a hot air drier. The density of colours of the printed substrates remained the same before and after the substrates were washed thereby giving fast and high quality printed images. Besides the porosity and breathability of the substrates were restored after the film was washed off. Porosity of the substrates gives transparency to them and adds to the brightness and clarity of the printed images. Breathability of the substrates also gives comfort to the users, say in the forms of printed garments, bedspreads, towels, pillow covers or the like. The process of the invention is simple, easy and convenient to carry out in that the method of fixing the film to the meshed member is easy, simple and convenient to carry out and the process also eliminates the ironing step. Due to elimination of the ironing step the process consumes less energy and is economical. WE; CLAIM : 1. Substrate for ink jet printing with hydrophobic solvent based inks comprising a meshed member laminated on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns, the ink jet printing with hydrophobic solvent based ink being carried out on the opposite unlaminated side of the meshed member. 2. Substrate as claimed in claim 1, wherein the meshed member is textile materials such as woven or non-woven fabrics or cloths or polyester or jute or hessian or blends thereof. 3. Substrate as claimed in claim 1, wherein the meshed member is non -textile materials such as meshed or perforated plastic sheets. 4. Substrate as claimed in any one of claims 1 to 3, wherein the water soluble film is of 10 to 75 microns in thickness. 5. Substrate as claimed in anyone of claims 1 to 3, wherein the water soluble film is of 15 to 50 microns in thickness. 6. A process for ink jet printing with hydrophobic solvent based ink on a substrate comprising first laminating a meshed member on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns so as to form the substrate followed by ink jet printing the substrate with hydrophobic solvent based ink on the opposite unlaminated side thereof and washing and drying the printed substrate. 7. A process as claimed in claim 6, wherein the meshed member is laminated with the water soluble film on one side thereof by heat or wet sealing or by using water soluble adhesives. 8. A process for ink jet printing with hydrophobic solvent based ink on a substrate substantially as herein described particularly with reference to the Examples 1 to 3. 9. Printed substrate obtained by the process as claimed in any one of claims 6 to 8. Dated this 6th day of April 2004 (Jose M A) of Khaitan & Co Agent for the Applicants

Full Text

FORM 2
THE PATENTS ACT, 1970 (39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2005
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
Substrate for ink jet printing with hydrophobic solvent based ink.
APPLICANTS
Name : Arrow Coated Products Limited
Nationality : Indian Company
Address : 5D Laxmi Industrial Estate, New Link Road,
Andheri West, Mumbai 400053,
Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

ORIGINAL
894/MUM/2001

GRANTED
22-6-2005

FIELD OF INVENTION
This invention relates to a substrate for ink jet printing with hydrophobic
solvent based ink.
This invention also relates to a process for ink jet printing with hydrophobic solvent based ink on a substrate.
PRIOR ART
Ink jet printing is carried out with aqueous or solvent based inks. If textile substrates such as woven or non-woven fabrics or cloths or jute or blends thereof which are meshed or perforated by the very nature thereof or non-textile substrates such as plastics sheets which are meshed or perforated, are directly ink jet printed, the ink seeps through the substrates due to the perforations or gaps in such substrates resulting in poor quality printed images besides other disadvantages such as wastage of inks.
US Patent No 4,725,849 describes a process for ink jet printing cloth using aqueous inks, wherein prior to printing, the cloth is coated with a layer of water soluble or hydrophilic resin containing solution which is moist and has
a viscosity of 1000 - 1500 cp at 25°C. The ink receiving layer absorbs the

ink quickly and prevents feathering and seepage of the ink through the perforations or gaps of the substrate. The ink is fixed on the substrate by ironing followed by removing the ink receiving layer with a neutral detergent and drying the printed substrate.
The ink receiving layer is formed by dissolving or dispersing one or more polymers in a solvent such as water. The polymers include compounds such as water soluble or hydrophilic resins which may be natural or synthetic, such as albumin, gelatin, casein, starch, cationic starch, gum arabic or sodium alignate or water soluble polyamide, polyacrylamide, polyvinylpyrrolidone, quaternary salts of polyvinylpyrrolidone, polyethyleneimine, polyvinylpyridinium halides, melamine resin, polyurethane, corboxymethylcellulose, polyvinyl alcohol, cation-modified polyvinyl alcohol, water soluble polyester or poly(sodium acrylate). For the purpose of reinforcing the ink receiving material and/or enhancing its adhesion to the substrate there may optionally be used jointly a resin such as latex, polyvinyl formal, polymethylmethacrylate, polyvinyl-butyral, polyacrylonitrile, polyvinyl-chloride, polyvinyl-acetate, phenolic resin, or alkyd resin.

Good quality images are reported to have been printed with the above process. Besides, porosity and breathability of the printed substrate is restored due to removal of the ink receiving layer. Because of the ironing step, the process is, however, time consuming and tedious to carry out and it is also energy consuming.
US Patent No 6291023 teaches the use of a coating composition on textile substrates so as to improve the quality of printing thereon generally by employing ink jet printing with aqueous inks. The coating composition consisits of a mixture of azetiddinium and guanidine polymers, a copolymer of azetidiniurn and guanidine monomers and a poly ( amino amide) -epichlorohydrin resin. The coating composition continues to remain on the substrates after the printing thereby rendering the substrate non-porous and non-breathable. Besides the coating composition is expensive.
OBJECTS OF INVENTION
An object of the invention is to provide a substrate for ink jet printing with hydrophbic_Solvent based ink which gives good printed images with breathability to the substrate.

Another object of the invention is to provide a process of ink jet printing with hydrophobic solvent based ink on a substrate, which gives good printed images with breathability to the substrate.
Another object of the invention is to provide a process of ink jet printing with hydrophobic solvent based ink on a substrate, which is simple, convenient and less time consuming to carry out.
Another object of the invention is to provide a process of ink jet printing with hydrophobic solvent based ink on a substrate, which is less energy consuming and is economical.
DESCRIPTION OF THE INVENTION
According to the invention there is provided a substrate for ink jet printing with hydrophobic solvent based inks comprising a meshed member laminated on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns, the ink jet printing with hydrophobic solvent based ink being carried out on the opposite unlaminated side of the meshed member.

The meshed member may be textile materials such as woven or non-woven fabrics or cloths or polyester or jute or hessian or blends thereof. Alternatively, the meshed member may be non - textile materials such as meshed or perforated plastic sheets.
The water soluble film may have any thickness that is sufficient to prevent seepage of inks. Preferably, the water soluble film is of 10 to 75 microns in thickness and still preferably between 15 to 50 microns in thickness.
According to the invention there is also provided a process for ink jet printing with hydrophobic solvent based ink on a substrate comprising first laminating a meshed member on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns so as to form the substrate followed by ink jet printing the substrate with hydrophobic solvent based ink on the opposite unlaminated side thereof and washing and drying the printed substrate.
•The meshed substrate is laminated with the water soluble film on one side thereof by any known method such as heat or wet sealing or using water

soluble adhesives such as poly vinyl acetate derivatives, acrylic derivatives, guar gum or carboxymethylcellulose or gelatin glues.
The water soluble film may be cold or hot water soluble and may be made of acrylic acid polymers, acrylic ester polymers, acrylic acid copolymers, acrylic ester copolymers, polymers of acrylic acids and esters, cross linked polyvinyl alcohols, cross linked cellulose derivatives, ethyl cellulose, nitrocellulose, cellulose butyrate, cellulose acetate butyrate, ethylene vinyl polyalcohol, ethylene vinyl acetate, acrylic emulsion, polyvinylchloride emulsion, polyvinylidene dichloride emulsion, polyvinyl butyral, natural or synthetic waxes, polyurethanes, modified polyvinyl alcohols or silicone based polymers.
According to the invention there is also provided printed substrate obtained by the process described above.
During printing due to lamination of the meshed member the perforations or gaps in the meshed member are plugged by the water soluble film. Therefore the ink does not flow through the perforations or gaps and result in wastage.
At the same time due to the hydrophobic nature of the solvent based ink, it

does not get absorbed by the water soluble film thereby facilitating absorption of the entire ink by the meshed member thereby ensuring high quality printed images on the meshed member.
Ink jet printing may be carried out on the substrate immediately after lamination or after a storage period.
The following experimental examples are illustrative of the invention but not limitative of the scope thereof.
Example 1 100% Cotton cloth (10 M x 1 M) was laminated on one side thereof with a water soluble film of 20 microns thickness ( being sold by us under the brand name EC 200 WSF) by heat sealing to from the substrate which was printed on the opposite unlaminated side thereof using an ink jet printer Vutek -USA using a hydrophobic solvent based ink (Vutek of Vutek- USA). The printed substrate was washed with water and dried with a hot air drier.

Example 2 100% Cotton cloth (10 M x 1 M) was laminated on one side thereof with a water soluble film of 25 microns thickness ( being sold by us under the brand name EC 250 WSF) by wet sealing to form the substrate which was printed on the opposite unlaminated side thereof using an ink jet printer Vutek -USA using a hydrophobic solvent based ink (Vutek of Vutek -USA). The printed substrate was washed with water and dried with a hot air drier.
Example 3 Perforated polyvinyl chloride sheet (5 M x 1M) was laminated on one side thereof with a water soluble film of 15 microns thickness (being sold by us under the brand name EC 150 WSF) using water soluble adhesive (Fevicol of Parekh Industries, Mumbai) to form the substrate which was printed on the opposite unlaminated side thereof using an ink jet printer Vutek -USA using a hydrophobic solvent based ink (Vutek of Vutek- USA). The printed substrate was washed with an aqueous solution of Surf Excel (detergent) of Hindustan Lever Ltd, Mumbai followed by drying with a hot air drier.

The density of colours of the printed substrates remained the same before and after the substrates were washed thereby giving fast and high quality printed images. Besides the porosity and breathability of the substrates were restored after the film was washed off. Porosity of the substrates gives transparency to them and adds to the brightness and clarity of the printed images. Breathability of the substrates also gives comfort to the users, say in the forms of printed garments, bedspreads, towels, pillow covers or the like. The process of the invention is simple, easy and convenient to carry out in that the method of fixing the film to the meshed member is easy, simple and convenient to carry out and the process also eliminates the ironing step. Due to elimination of the ironing step the process consumes less energy and is economical.

WE; CLAIM :
1. Substrate for ink jet printing with hydrophobic solvent based inks
comprising a meshed member laminated on one side thereof with a
water soluble film having a thickness in the range of 5 to 100
microns, the ink jet printing with hydrophobic solvent based ink being
carried out on the opposite unlaminated side of the meshed member.
2. Substrate as claimed in claim 1, wherein the meshed member is textile materials such as woven or non-woven fabrics or cloths or polyester or jute or hessian or blends thereof.
3. Substrate as claimed in claim 1, wherein the meshed member is non -textile materials such as meshed or perforated plastic sheets.
4. Substrate as claimed in any one of claims 1 to 3, wherein the water soluble film is of 10 to 75 microns in thickness.
5. Substrate as claimed in anyone of claims 1 to 3, wherein the water soluble film is of 15 to 50 microns in thickness.

6. A process for ink jet printing with hydrophobic solvent based ink on a substrate comprising first laminating a meshed member on one side thereof with a water soluble film having a thickness in the range of 5 to 100 microns so as to form the substrate followed by ink jet printing the substrate with hydrophobic solvent based ink on the opposite unlaminated side thereof and washing and drying the printed substrate.
7. A process as claimed in claim 6, wherein the meshed member is laminated with the water soluble film on one side thereof by heat or wet sealing or by using water soluble adhesives.
8. A process for ink jet printing with hydrophobic solvent based ink on a substrate substantially as herein described particularly with reference to the Examples 1 to 3.
9. Printed substrate obtained by the process as claimed in any one of claims 6 to 8.
Dated this 6th day of April 2004
(Jose M A)
of Khaitan & Co
Agent for the Applicants

Documents:

894-mum-2002-cancelled pages(22-06-2005).pdf

894-mum-2002-claims(granted)-(22-06-2005).doc

894-mum-2002-claims(granted)-(22-06-2005).pdf

894-mum-2002-correspondence(ipo)-(12-2-2007).pdf

894-mum-2002-correspondence1(11-10-2002).pdf

894-mum-2002-correspondence2(05-02-2007).pdf

894-mum-2002-form 1(11-10-2002).pdf

894-mum-2002-form 13(12-01-2004).pdf

894-mum-2002-form 19(15-04-2004).pdf

894-mum-2002-form 2(granted)-(22-06-2005).doc

894-mum-2002-form 2(granted)-(22-06-2005).pdf

894-mum-2002-form 3(11-10-2002).pdf

894-mum-2002-form 4(12-01-2004).pdf

894-mum-2002-form 5(06-04-2004).pdf

894-mum-2002-power of authority(11-10-2002).pdf

« Previous Patent

Next Patent »

Patent Number

205738

Indian Patent Application Number

894/MUM/2002

PG Journal Number

43/2008

Publication Date

24-Oct-2008

Grant Date

09-Apr-2007

Date of Filing

11-Oct-2002

Name of Patentee

ARROW COATED PRODUCTS LTD.

Applicant Address

5 D LAXMI INDUSTRIAL ESTATE, NEW LINK ROAD, ANDHERI WEST, MUMBAI,

Inventors:

#	Inventor's Name	Inventor's Address
1	SHILPAN PRAVIN PATEL	A-303, SUMAN APTS., III CROSS LANE, LOKHANDWALA COMPLEX, ANDHERI (WEST), MUMBAI - 400 053,

PCT International Classification Number

D06P 5/30

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA