TR201810615A2 - Transfer Printing Process to Natural Leather - Google Patents

Abstract

The invention relates to a transfer printing method which enables the transfer of the image consisting of pictures, letters, words, phrases, photographs, logos or patterns to the transfer foil and from said transfer foil to the natural skin, the preparation of the natural leather (10), the binder of the natural leather (10) and the temperature. application of the active adhesive (20), the printing (30) of the image (letter, word, word group, photo, logo and pattern), ie the image of the polyester using a digital latex printing machine (30) and ink composition containing pigment and latex particles. printing on the single-layer transfer foil 40 consisting of film and transferring the surface of the transfer foil 40 from the surface of the transfer foil 50 to the surface of the binded natural leather 10 with pictures, letters, words, phrases, photographs, logos or patterns. characterized in that the transfer comprises the process steps.

Description

DESCRIPTION Natural Leather Transfer Printing Process Technical Area An invention consists of a picture, letter, word, phrase, photograph, logo or pattern. the resulting image is first transferred to the transfer foil and from the said transfer foil. It is related to the transfer printing method that allows it to be transferred to the natural leather. Prior Art When we examine today's general printing techniques, it is like natural leather. flexible and uneven surfaces, surface appearance such as patterns or shapes two main headings are the printing methods applied with the aim of adding visual features. We can name it below. One of these printing methods is direct printing. The other is the transfer printing method.

The direct printing method is used to create patterns, colors on many material surfaces today. In order to provide many visual features such as shape, number, picture. is used. This printing method is to give a pattern to the surface to be printed. Based on the direct transfer of coloring chemicals used for is based on. Techniques in the application of this method, rotogravure printing with analog printing techniques such as printing technique, flexo printing technique, offset printing technique. as digital printing techniques such as inkjet printing technique, laser printing technique is diversified.

It can be printed on the surfaces by applying the direct printing technique. common properties of materials are determined by a certain molding or shaping method. they are measured. In detail, printing with direct printing technique printing machines that can print, the materials they print in two different forms They can print using the classification states. These are respectively; oppression Roll-to-roll, which can print the material to be made rolled into rolls. printers capable of printing and industrial, such as square or rectangular in shapes and sizes that can be printed in large quantities and in the form of layers. are sheet printing machines that can print on materials.

Printing on material with an irregular structure, such as natural leather It is quite difficult to do. Natural leather does not have a definite shape. every skin differs in size and shape. This physical condition of natural skin, It makes it difficult to press by applying direct pressure technique to the skin surface. Natural due to the formal condition of the skin layer and the existing printing techniques. This situation, which is negative for the machines that print using different printing machines that use direct printing technique in recent years to developed. However, printing on the natural leather surface by direct printing method The difficulties in the use of these machines, which were developed with the aim of making machine speeds meet the needs of industrial production. has difficulty in answering. Apart from speed and production difficulties, it is a very important The other negative is the color caused by the printing surface in the direct printing technique. vitality losses.

The permeable nature of the skin surface means that the ink transferred to the skin surface causes it to be absorbed by the surface. From the skin surface into the skin penetrating ink is a negative condition for the formation of vivid colors on the surface. constitutes. This situation, besides the loss of color on the skin surface, the image that is desired to be created on the leather surface by intermingling the colors. also cause quality problems.

As a result of all these negativities mentioned, in the natural leather printing industry The method that has been accepted and used for many years is the transfer printing technique. has been. Transfer printing technique, printing materials used for transfer providing the speed and quantities to meet industrial printing needs. It provides the advantage of working on machines and is compared with direct printing technique. It is preferred because it provides more vivid colors and clear patterns on the leather surface. is being done.

Transfer printing technique is the desired application to the surface of the final product. any pattern, shape or number has previously been transferred to another carrier material. printing and transferring from the printed material to the final product by various methods method to do. Today, intaglio, offset, digital inkjet and digital laser Many analog and digital printing machines using printing techniques, transfer printing used in the method. Today, with the transfer printing method, textile, surface printing works in many sectors such as advertising, household goods and furniture industry is being done.

In the printing industry, for printing on many materials The transfer printing technique used has also been used in the natural leather printing industry for many years. is used. Non-standardized dimensions of natural leather and surface features require the use of the transfer printing method.

In the transfer printing method, printing on a larger surface than the skin surface can be done. The material that will transfer the print to the final surface It is called transfer film, paper or foil according to its raw material. Transfer films It can be rolled or layered in specified dimensions. It's natural in this way The pressure is transferred perfectly to the entire surface of the leather.

The process of transferring the print from the printed transfer foil to the natural leather surface pressing which applies heat over a certain degree from sheet or roll to roll done on machines. Presses that perform the transfer process as a layer are layer presses, Transfer presses that perform roll-to-roll transfer are calender presses. is named. Leather tanning in tanneries before pressing The ability to take the pressure from the transfer foil on the natural leathers that have been processed Thermal glue is applied in spraying machines. natural skin surface The pre-drying process of the applied glue is carried out in heat tunnels. preliminary preparation It is ready for the natural leather transfer process.

Print transfer from roll-to-roll transfer foils to natural leather surface machines that provide a certain speed with an amplitude of 90-140 degrees Celsius they work. With the printed side of the pre-prepared leather surface transfer foil two cylinders that apply a certain amount of heat and pressure to be joined is passed through. At this time, the adhesion of the glue on the heat applied leather surface feature is activated. Adhesion feature activated on the natural leather surface The glue holds the printed pattern on the surface of the transfer foil. With each other transfer foil and natural the leather passes over the cooling rollers at the end of the machine.

Cooling rollers are used to make the thermal glue lose its stickiness. Increasing the efficiency of the transfer process by shortening the time to reach low temperatures is provided. Combined with the transfer foil after the cooling rollers and The natural leather, which cools the surface, is separated from the transfer foil by hand. Thus, The pattern on the transfer foil was transferred to the natural leather surface and the transfer process was carried out. it will be terminated.

Transfer foils currently used in the natural leather printing process Some of the rotogravure printing technique that prints patterns, pictures or numbers on the surface there are downsides. For example, the patterns of the rotogravure printing technique Its preparation requires high cost and time. Every new edition to be made is new Requires molds. According to the characteristics of the printing, the number of these patterns is generally 4 (CMYK colors) often range from 1 to 8. These costs are minimal. affects printing habits. Miniinum of a pattern resulting from mold costs printing patterns can be tens of thousands of meters. Transfer printing on the natural leather surface It has been seen in the companies over time that it is necessary to buy more than their needs. Printed transfer foils become inactive without doing anything. Of course this status means wasted product.

Transfer foils currently used in the natural leather printing process Preparation of molds needed for printing on rotogravure machines Since it takes time, proof prints and samples to be prepared also take a certain time. requires. This situation causes temporal problems in the product approval process. it causes.

With the developing technology, especially in the field of advertising and printing The digital printing machines that have started to be used have also been used in the leather industry in recent years. has been put into use. Especially used in the field of natural leather printing. Transfer foils used for transfer printing method are produced with digital printing machines. has become printable. Digital machines die compared to analog presses they don't need it. Since they can print without a mold, they are free from mold costs. they save money. In very low quantities as mold cost is saved It even brings ease of printing. Don't put pressure on your need does not necessitate it. Ease of printing in lower quantities, printing leads to increased diversity. Purchase of the diversified final product to the end user brings convenience. The ease of purchase brought about increases the consumption amount of the product. It is a helpful factor.

In addition, digital printers are more likely to be compared to analogue printers. sample can be prepared much more quickly. Approval process of quickly prepared samples shortens and this helps to switch to the production process more quickly.

However, one of the most important advantages of digital printing machines and an increase in print quality. Picture clarity and color transitions analog printing It is far superior to the machines. Print with different drop sizes The advantage of playing with the features of digital printing machines, analog printing It is one of the most important advantages compared to the machines.

Transfer printing used in the field of natural leather printing today digital printing machines used in the state of the art solvent are printing machines that use inks. Solvent digital printing machines they get their name from the ink they use when printing.

Ink types used in digital printing machines, advertising and In the printing industry, there are 3 types as Solvent, UV and Latex. Solvent based Machines that use ink are called solvent digital printing machines. Solvent digital printing machines, with chemicals carrying ecological content in the coming years Along with the development of formulated inks, it is also called eco-Solvent. is diversified. UV inks are inks that are cured by ultraviolet light. UV Printing machines that use ink are called UV digital printing machines.

The latex-containing ink composition is water-based. in the latex group They are called by this name because they use connectors. Latex based ink Latex digital presses to digital presses using composition is named.

In the last few years, natural leather used in transfer printing digital printing using solvent and eco-solvent printing ink on transfer foils Printing was started with the machines. Thus, a small number of prints can be made. In addition to providing a variety of patterns and colors, better quality printing results have been achieved. Along with the advantages it provides, solvent and eco-solvent In machines that print using printing ink, the ink they use Some disadvantages are also observed. For example solvent and eco-solvent Transfer foil printed with printing ink is special for this technique. It is produced in small quantities by the manufacturer. price and supply difficulties are experienced. Along with these, the image is a two-layer from the transfer foil to the substrate (the surface to be printed) with the lamination process is being transmitted. In the mentioned transfer process, one layer of the transfer foil It is transferred to the substrate (printed surface) together with the print (image).

The printing method, which is the subject of the invention, is used in natural leather transfer printing. Generally used in the advertising industry for printing on transfer foil, Latex digital printing with inks containing water-based latex material the use of machines.

Outdoor products, event banners, vehicle graphics, backlit latex printing machines on products, traffic signs, wall coverings and canvas can be printed with The printing process is based on the ink containing the latex mixture. by transferring onto fabric or similar material. is taking place. However, in this printing and transfer method, natural leather It is not possible to print directly on the surface. Print with latex mixed ink printing on smooth-edged surfaces that can be wound in rolls can be done.

Latex printing machines, solvent and eco-solvent printing machines It provides the opportunity to print with more vivid colors than Besides, latex Its ink composition has a more flexible structure compared to its competitors.

One of the most important elements desired from leather is its flexibility. Especially bending and shoes, seats, accessories, etc. where stretching is necessary. leathers in materials can be used. The latex-containing ink composition has a flexible structure. has. It is compatible with the skin. With the stretch on the printed surface Elasticity of latex-containing ink composition without cracking required. By printing with a latex-containing ink composition, In cases such as bending, there is no defect in the printing. Also latex Since the ink composition is water-based, solvent and eco- It contains chemicals that are less harmful to the environment than solvent inks.

Latex printing machines with color printing inks by transferring the ink composition to the surface before it reaches the print surface, adhesion of the latex-containing ink composition to the surface and allowing the composition to form clearer patterns and pictures without flowing from the surface. It helps. This feature of the latex printing machine is solvent and eco-solvent. Print on more product surfaces than machines that print with inks provides the advantage of being able to This is a transfer pressure to the natural leather surface. Eliminates the need for a special coating for the transfer foil to be made. removes it. For the transfer foil to be printed with a latex machine, there is no surface Unprocessed polyester film is used in thicknesses between 8-50 microns. from transferring the latex-containing ink composition to a surface. is mentioned. In the mentioned transfer process, the transfer paper (release paper) an ink containing particles of latex to create an image on it composition is used. In the mentioned method, the image, transfer paper (printed transfer paper), a substrate (printing) with the lamination process is transferred onto the surface to be made). In the lamination process; substrate, printed transfer paper and a release paper is laminated. Thus, from image transfer paper (printed transfer paper) transferred to the substrate. Outdoor products with latex digital printing machines, event posters, vehicle graphics, backlit products, traffic signs, wall It is possible to print on coatings and canvases. Printing process, latex-containing by transferring the ink onto fabric or similar material. is taking place. However, in this printing and transfer method, natural leather It is not possible to print on the surface.

Purpose of the Invention The purpose of the invention; It adheres well to the skin surface, has high light fastness, It is to create a new transfer printing method that provides pressure resistant to stretching.

Another purpose of the invention; providing scratch-resistant pressure on the leather surface is to create a new transfer printing method.

Another purpose of the invention; ecological and eco-friendly for printing on leather surface is to create a new transfer printing method.

Another purpose of the invention; make the skin surface more flexible is to create a transfer printing method that provides

Another purpose of the invention; a transfer print that can be applied quickly to create the method.

Another purpose of the invention; easy and fast color and pattern on the leather surface is to create a transfer printing method that allows revisions to be made.

Another purpose of the invention; making it possible to print small volumes is to create a transfer printing method.

Another purpose of the invention; for natural leathers of different sizes and variations It is to ensure that the transfer process can be done without using different molds.

Another object of the invention is to designate any material of the transfer foil together with the pattern. a transfer printing method in which only the pattern is transferred, not a layer is to create.

On the natural leather surface developed to realize the mentioned purposes. in the transfer printing method; polyester film as transfer foil (40) is used. Polyester film used as transfer foil (40) temperature used in the transfer process due to its characteristic structure. can withstand. Digital latex printing on corona-free transfer foil (40) After the desired image is transferred with the machine (30), it is transferred to the binder with the transfer press (50). said image is transferred to the surface of the natural leather (10).

Description of Figures The attached Figure - 1 nature] is the general view of the leather (20).

Figure-2 The general process of applying the heat active adhesive (20] is the view. At this stage, the front of the natural leather surface together with the heat active adhesive Painting can also be done.

Figure-3, which allows the print (42) to be transferred to the transfer foil (40). is a perspective view of the digital latex printing machine (30).

Figure -4 The transfer process of the print (42) on the natural leather (10) from the side is the view.

Figure-5 Transfer foil (40) having only the first layer (41) perspective view.

Figure-6 Transfer foil (40) having only the first layer (41) is the perspective view of the printed version (42) on it.

Figure-7 Press only on the natural leather (10) with the transfer press (50) (42) is the perspective view of the shape showing that it has been transferred.

Figure-8 First layer (61) and second layer used in the current technique. (63) is the perspective view of the transfer foil (60).

Figure-9 Transfer with the first layer (61) used in the current art is the perspective view of the pressed (62) foil (60) on it.

Figure-10 In the method used in the current technique, the printing (62) and the second is the perspective view of the shape showing that layer (63) has also been transferred.

The main parts expressed in the figures are listed below as numbers and names. given. (10) Natural leather (substrate) (20) Heat activated adhesive (30) Digital Iateks printing machine (40) Transfer foil (41) First layer (release paper) (42) Print (image) (50) Transfer press (60) Transfer foil (61) First layer (release paper) (62) Print (image) (63) Second layer (printed transfer paper) Detailed Description of the Invention An invention consists of a picture, letter, word, phrase, photograph, logo or pattern. the resulting image is first transferred to the transfer foil (40) and to the said transfer transfer printing that allows the transfer from the foil (40} to the natural leather (10) relates to the method. Developed natural leather (10] transfer printing process, latex transfer to the surface of natural leather (10) using the ink composition containing It is a printing method made by printing technique. digital latex printing A latex-containing ink composition is used in the machine (30). Latex The ink composition contains Iatex particles and pigment(s).

Printing using solvent-based ingredients in latex printing method Ink composition containing Iatex, different from the methods is used.

Ink containing Iatex in the transfer printing process to natural leather (10) composition is used. Said latex is composed of many substances. It is a plant extract in liquid form. Latex is also known as natural rubber.

It contains protein, starch, alkaloid, sugar, oil, gum, tannin and resin. are available. In addition to these, Iatexin contains acrylates, methacrylates, Vinyls, styrenes, ethylenes, vinyl chlorides, vinylindene chlorides, maleate esters, fumarate esters, itaconia esters, their combinations and mixtures polymers having selected monomers can also be found.

The latex-containing ink composition ensures vivid colors in print (42). makes it happen. In addition, thanks to the Iatex-containing ink composition, it is flexible. a print surface is formed. Transferred print surface, rigid While adapting to non-existent surfaces, it can withstand the harsh physical conditions of outdoor spaces. can endure. However, digital Iateks printers (30) can only Natural leather as it can print on smooth-edged surfaces that can be rolled up. (10) cannot be used on the surface.

In the first stage of the printing process, the natural leather (10) is bindered.

Binder binding, natural leather as shown in figure-2 (10) It is a priming process applied to the surface. Heat with binder process active adhesive (20) is applied. Find an alternative application, before or during the binding process, said natural skin (10), to create contrast with the pressure (42) to be applied. It is painted in a bright color. In the next stage, it is applied to the surface of the natural leather (10). The desired picture, letter, word, word group, photograph, logo and printing (42) with content such as patterns, with a digital latex printing machine (30) is printed on the transfer foil (40). Said transfer foil (40) must be at least One surface has not been corona applied. After the transfer process is finished, it is natural only the pressure (42) remains on the surface of the skin (10).

With digital latex printing machine (30) on corona-free transfer foil (40) After the desired image is transferred, the natural leather with binder is removed with the transfer press (50). Said image is transferred to the surface (10). The mentioned transfer process It is made at a temperature between 90°-140°. The transfer process here is the base The skin (10) on it is printed with a transfer press (50). is being implemented.

used in digital latex printing machines (30) of the current art. the transfer foil (60) is composed of the first layer (61) and the second layer (62). It is two-layered. In addition to the two layers mentioned, there is also a print (62) There is an image to be transferred. Print (62), on second layer (63) is applied and the first layer is applied after the transfer printing process is completed. (61) is removed. Thus, printing (62) on the surface to be transferred, It remains with the second layer 63 . The second layer (63) is from the print (62) i.e. print (62), second layer (63) as it covers a larger area than the image stays in. In Figure- 9 and Figure-10, this situation is clearly is shown. When examined carefully, the transfer-printed natural leather the second layer (63) is noticeable on its surface. This is aesthetically creates a negative situation. Transfer used in the process of the invention foil (40) consists of a single layer. The second expressed in the current art layer (63l is not available. Also, after the transfer process is completed the first layer (41) is completely removed and is only to be transferred on the skin. print of desired Iatex-containing ink composition (42) remains. In this way, cost advantage by using less material is provided and a very high quality result is obtained visually.

In addition, different products can be produced as a digital latex transfer printing machine (30) is used. There is no need to use different molds for Thus, in the desired quantity transfer printing can be done quickly on natural leather (10).

In the printing method in which latex-containing ink composition is used, the most Transfer foil (40) and transfer foil on one side of which is not corona-treated preSI (50) is used. At least one surface has not been corona treated The transfer foil (40) is taken to the transfer press (50) and the natural content of the content it contains it is transferred to the skin (10). Thus, at least one surface The print (42) on the untreated transfer foil (40) is of good quality. it is transferred to the natural leather (10) in a way.

Polyester film is used as the transfer foil (40). Transfer The polyester film used as the foil (40] is transferred due to its characteristic structure. It can withstand the temperatures used in the process. As transfer foil (40) The surface tension values of the polyester film used are in the range of 40-60 dyne/cm and It usually has a thickness in the range of 8-50 microns. Surface tension values Ink composition with latex content of less than -60 dyne/cm surface even without additional treatment such as chemical or electrical corona treatment. from the polyester film with higher tension to the surface of the transfer foil (40) can be printed. The closed surface structure of the transfer foil (40) to be transferred without transferring the print (42) ie the image after printing. Suitable surface conditions for long-term storage and perfect transfer later. offers.

Digital latex printing machine (30), pigment or latex containing pigments to form the containing ink composition to form the pattern to be transferred. Non-corona treated polyester film transfer foil (40) surface is applied. Before this application, from a different channel of the same printing device, Pre-print that allows pigment-containing latex-containing inks to adhere to the surface but it is applied. In this way, the latex-containing ink composition is applied to the printing surface. before reaching the surface, the adhesion of the said composition to the surface and It is ensured that clearer patterns and pictures are formed without flowing.

Such as inventions, pictures, letters, words, phrases, photographs, logos and patterns. digital latex printing of the print (42) consisting of the contents, that is, the image printing on the transfer foil (40) with the machine (30) and then natural leather (10) is the method of transferring to the following process steps. is occurring; - Preparation of natural leather (10), - Binding of natural leather (10) and application of heat active adhesive (20) to be made, - Such as pictures, letters, words, phrases, photos, logos and patterns digital latex print (42) of the content, that is, the image polyester film single layer transfer foil (40) with printing machine (30) pressing on - From the corona-free transfer foil (40) surface, with transfer press (50) and binder picture, letter, word, word group, photo, logo on natural leather (10) surface or transferring the image consisting of the pattern. it contains.

An alternative embodiment of the invention consists of the following processing steps is coming; - Preparation of natural leather (10), Binding of natural leather (10) and application of heat active adhesive (20) to be made, Before or during the binding operation, the mentioned natural skin (10) to create contrast with the pressure (42) to be applied. dyeing it to a color that provides Such as pictures, letters, words, phrases, photographs, logos and patterns. digital latex print (42) of the content, that is, the image polyester film single layer transfer foil (40) with printing machine (30) pressing on, From the corona-free transfer foil (40) surface, with a transfer press (50) and binder picture, letter, word, word group, photo, logo on natural leather (10) surface or transferring the image consisting of the pattern. it contains.

Claims (1)

REQUESTS . The invention relates to the transfer printing method that enables the transfer of the image, consisting of a picture, letter, word, group of words, photograph, logo or pattern, to the transfer foil and from the said transfer foil to the natural leather. - Preparation of natural leather (10), - Binding of natural leather (10) and application of heat active adhesive (20), - Printing (42) consisting of content such as pictures, letters, words, phrases, photographs, logos and patterns, printing the image on a single-layer transfer foil (40) consisting of polyester film using a digital latex printing machine (30) with an ink composition containing pigment and latex particles, and - From the surface of the transfer foil (40), with a transfer press (50) and natural leather (10) with a binder. ) includes the process steps of transferring an image consisting of a picture, letter, word, word group, photograph, logo or pattern to its surface. . It is the transfer printing method mentioned in the request and its feature is; It is the application of an image consisting of a picture, letter, word, word group, photograph, logo or pattern to be transferred to the natural leather (10) surface with a digital latex mask machine. . It is the transfer printing method mentioned in claim 1 and its feature is; It is a printing method made by transfer printing technique to the surface of natural leather (10) using a latex-containing ink composition. . It is the transfer printing method mentioned in Claim 3 and its feature is; latex-containing ink composition contains latex particles and pigment(s). It is the transfer printing method mentioned in Claim 1 and its feature is; at least one surface of the transfer foil (40) has not been treated with corona. The requested return is the transfer printing method and its feature is; the transfer foil (40) is a polyester film. It is the transfer printing method mentioned in Claim 6 and its feature is; The surface tension values of the polyester film used as the transfer foil (40) are in the range of 40-60 dyne/cm. It is the transfer printing method mentioned in claim 6 and its feature is; The thickness of the polyester film used as the transfer foil (40) is in the range of 8-50 microns. It is the transfer printing method mentioned in Claim 1 and its feature is; It is the application of prepress lacquer to the transfer foil (40) in Iateks digital printing machine. It is the transfer printing method mentioned in Claim 1 and its feature is; before or during the binding process, said natural leather (10) is dyed a color that provides contrast with the pressure (42) to be applied.