CN109763360B - A method of embossing after bronzing printing - Google Patents
A method of embossing after bronzing printing Download PDFInfo
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- CN109763360B CN109763360B CN201910063064.9A CN201910063064A CN109763360B CN 109763360 B CN109763360 B CN 109763360B CN 201910063064 A CN201910063064 A CN 201910063064A CN 109763360 B CN109763360 B CN 109763360B
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Abstract
The invention provides a method for re-embossing after gold stamping, which comprises the steps of firstly manufacturing a triangular fiber fabric by using fibers with triangular cross sections, and then sequentially carrying out gold stamping and embossing on the triangular fiber fabric. The invention utilizes the stable structure of the triangular fiber, does not deform under the pressure and heat applied in the embossing process after the gold stamping printing, keeps the continuous and smooth plane distribution of the metal coating adhered to the surface of the fiber unchanged, and ensures that the gold stamping pattern still keeps the metallic luster after the embossing.
Description
Technical Field
The invention relates to the field of textile printing and dyeing, in particular to a method for re-embossing after gold stamping printing.
Background
The terylene is an important variety in synthetic fibers, is the trade name of polyester fibers in China, and has wide application in the field of clothing because of the advantages of easy washing, quick drying, acid and alkali resistance, good wear resistance, firmness and durability, good elasticity, difficult deformation and the like. The polyester can be classified into polyester staple fibers and polyester filament yarns according to the length of the yarn. The short fiber is short fiber of several centimeters to ten and several centimeters and is mainly used for wool and woven cloth; the filament is a filament with the length of more than kilometer, and has wider application range, wherein the civil filament is generally used for silk, clothes and the like, and the industrial filament is mostly used for warp threads of tire cords, conveying belts and canvas, vehicle safety belts, conveying belts and the like. According to data statistics, the total chemical fiber yield in 2016 (1-11 months) is 4515.0 ten thousand tons, wherein the yield of the polyester fiber only reaches 3621.3 ten thousand tons and accounts for 80.2 percent of the total chemical fiber yield, the percentage of the polyester filament yarns is up to 60.6 percent, the percentage of the polyester staple fibers is 19.6 percent, and the polyester filament yarns become the most important chemical fiber varieties in China.
The polyester fabric surface is provided with various patterns, so that the decoration performance of the polyester fabric can be obviously improved, and the polyester fabric is highly popular with consumers. The common technology comprises gold stamping, embossing and the like, wherein the gold stamping technology transfers a pattern on the alumite to a printing stock under the action of heat and pressure, and the embossing is to utilize a metal roller engraved with a pattern to enable the surface of a fabric to generate physical plastic deformation under certain pressure and temperature.
With the increasing aesthetic requirements of consumers, the demands on the variety of clothes styles and flower shapes are increasing, and the demands on the consumers are difficult to meet by using a single printing and dyeing process. For example, with the reform of the national birth control policy, the demand for children's garments will increase substantially. Nowadays, adult clothes and children clothes present more personalized demands, and more decorative effects are required on clothes fabrics, such as metallic glittering effect patterns brought by the popular use of gold stamping technology in recent years. Each product has a life cycle, and when more and more gold stamping products appear in the market, consumers are inevitably difficult to select and even feel fatigue in purchasing behaviors. Therefore, the gold stamping craft clothing products need to be further upgraded, and the gold stamping craft products are enabled to be new products with higher grade and beautiful appearance by using the environment-friendly process, so that the mode of combining the gold stamping process and the embossing process becomes an innovative thought.
One of the ways of combining the bronzing and the embossing is to perform the bronzing and then the embossing. The surface of the fabric after gold stamping is adhered with a uniform and smooth metal coating through glue, so that continuous mirror reflection is generated for light, and the fabric shows metallic luster. However, in the subsequent embossing process, the surface of the fabric fiber is pressed to deform, so that the metal plating layer on the surface of the fabric becomes uneven and not smooth, the luster of the gold stamping pattern is reduced, and the matte visual effect is generated.
Disclosure of Invention
Based on the method, embossing is carried out after gold stamping to keep the metallic luster of the gold stamping patterns, so that the matte condition after embossing is avoided.
The method for re-embossing after gold stamping printing comprises the following steps:
s1 preparing a triangular fiber fabric: spinning triangular fibers with triangular cross sections into fabrics to obtain triangular fiber fabrics;
s2 gold stamping: the triangular fiber fabric and the hot stamping mould paper are bonded and heated and pressed, and a hot stamping pattern is formed on the surface of the triangular fiber fabric; the gold stamping mould paper comprises a metal coating, the metal coating is attached to the triangular fiber fabric, and the metal coating is adhered to the surface of the triangular fiber fabric to form a gold stamping pattern after gold stamping and printing;
s3 embossing: and (3) applying pressure to the surface of the polyester fabric subjected to the gold stamping printing by using a mould with the engraved pattern to apply heat and pressure, so as to obtain the embossed pattern on the surface of the triangular fiber fabric.
Compared with the prior art, the invention uses the triangular fiber to manufacture the fabric, carries out gold stamping printing and embossing, the metal coating is tightly adhered to the surface of the triangular fiber to form a gold stamping pattern with smooth surface in the gold stamping printing process, and is distributed in a triangular shape along with the fiber structure in the longitudinal direction of the fiber, and the metal coating forms continuous mirror reflection to light, so that the integral gold stamping pattern presents full metallic luster. The triangular fibers have stable structures, so that the triangular fibers can not deform under the pressure applied in the subsequent embossing process, and the distribution of the metal coating is kept unchanged, so that the gold stamping patterns still keep metallic luster after being embossed.
The hot stamping mould paper further comprises a film base layer, a separation coating and a glue coating, wherein the separation coating is fixed on the film base layer, the metal coating is arranged on the separation coating, the glue coating is coated on the metal coating, and the glue coating is attached to the surface of the triangular fiber fabric; the viscosity of the separation coating becomes lower after being heated so that the metal coating is separated from the film substrate, and the viscosity of the glue coating is increased after being heated so that the metal coating is adhered to the surface of the triangular fiber fabric.
Further, the gold stamping film paper also comprises a magnetic layer, and the magnetic layer is arranged between the separation coating and the metal coating; the embossing die in step S3 has the same magnetism as the magnetic layer. Repulsion is generated between the magnetic layer and the embossing die with the same magnetism, so that extrusion of the metal coating, the glue coating and the triangular fibers can be slowed down, and the condition that the metal coating is not uniformly distributed due to displacement under the pressure of the embossing process is avoided.
Further, after the gold stamping and printing step and before the embossing step, coating a magnetic layer on the surface of the gold stamping pattern; the embossing die in step S3 has the same magnetism as the magnetic layer.
Further, the hot stamping die paper further comprises a heat insulation layer, and the heat insulation layer is arranged between the metal coating and the glue coating. The heat insulating layer can prevent heat from being transferred to the glue coating, and the condition that the glue coating is heated, the flowability is increased, the displacement is caused, and the metal coating is not uniformly distributed is avoided.
Further, after step S3, an acid washing step is included to wash the magnetic layer on the surface of the triangular fiber fabric with acid. Because the reflection of the magnetic layer to the light is not as good as that of the metal coating, the metal coating can be exposed on the outermost layer of the gold stamping pattern after the magnetic layer is cleaned, and full metal luster is presented.
Further, the fiber is polyester fiber, the gold stamping magnetic layer is an iron oxide magnetic material, the metal coating is aluminum, the acid is concentrated nitric acid, and the acid washing is performed at normal temperature. The concentrated nitric acid does not react with aluminum at normal temperature, but can dissolve iron oxide magnetic materials.
Further, the heat insulation layer is an organic silicon heat insulation material.
Further, the heat insulation layer is one or more of methyl polysiloxane, methyl phenyl polysiloxane and vinyl polysiloxane.
Further, the separation coating is a silicone resin layer; the glue coating is a thermosensitive adhesive layer.
Drawings
FIG. 1 is a flow chart of the present invention;
fig. 2 is a schematic structural view of the hot stamping foil of embodiment 2.
Detailed Description
According to the invention, the fabric made of the fibers with the triangular cross sections is used for embossing after gold stamping printing, a metal coating is uniformly and fully adhered to the surfaces of the triangular fibers in the gold stamping printing process, and specular reflection is formed on the light rays, so that the gold stamping patterns formed by the metal coating present full metal luster; because the triangular fiber structure is stable, the distribution of the metal coating is not deformed when being pressed in the subsequent embossing process, thereby ensuring that the distribution of the metal coating is not changed and the luster of the gold stamping pattern is not changed and dull. The technical means of the present invention will be described below by way of specific embodiments.
Practice ofExample 1
As shown in the flow chart of fig. 1, the method for re-embossing after gold stamping printing of the invention firstly makes triangular fiber fabric, and then carries out gold stamping printing and embossing on the triangular fiber fabric in turn, and the specific steps are as follows:
(1) manufacturing a triangular fiber fabric: the triangular fiber fabric is obtained by spinning the triangular polyester fiber with a triangular cross section into a fabric.
(2) Gold stamping and printing: after the triangular fiber fabrics and the stamping mould paper are respectively attached, the triangular fiber fabrics and the stamping mould paper are put into a drum-type stamping machine in an open width mode and move at the speed of 20 m/min.
The hot stamping die paper comprises a PE film base layer, a separation coating fixed on the PE film base layer, and a metal coating and a glue coating which are sequentially stacked on the separation coating, wherein the glue coating is attached to the surface of the polyester fabric. And the separation coating is an organic silicon resin layer with lower viscosity after being heated, and the glue coating is a thermosensitive adhesive layer with higher viscosity after being heated, such as polyurethane, polystyrene and polyacrylate.
And adjusting the operating parameters of the gilding press, and applying 4 tons of pressure and 135 ℃ to the triangular fiber fabric and the gilding paper to ensure that the metal coating on the gilding paper is adhered to the surface of the triangular fiber fabric through the glue coating to form a gilding pattern.
(3) Stripping the gilding mould paper base layer: and after finishing the gold stamping printing, rolling the triangular fiber fabric and the gold stamping mould paper together, putting the triangular fiber fabric and the gold stamping mould paper into an oven, cooling for 24 hours at 50 ℃, and stripping the PE film base layer and the separation coating of the gold stamping mould paper from the surface of the triangular fiber fabric.
(4) Embossing: and (3) putting the triangular fiber fabric treated in the step (3) into a rolling type embossing machine in an open width mode at a moving speed of 20m/min, and applying pressure and heat to the surface of the fabric by a roller (namely a mold) with the engraved pattern at the temperature of 195 ℃ under the pressure of 4 tons to form the concave-convex patterns, namely the embossed patterns, on the surface of the polyester fabric. And rolling the triangular fiber fabric after embossing.
For comparison, the cross section of the fiber is pentagonal, triangular, hollow and round, and the fiber is spun into the fabric, and then the fabric is treated according to the processes of the steps (2) to (4).
The patterns obtained by the gold stamping, printing and embossing processes of the fabrics made of the four different fibers are subjected to sensory evaluation, and the results are as follows:
the result shows that the polyester fabrics respectively made of three fibers with triangular, pentagonal and triangular hollow cross sections can obtain the gold stamping patterns with full metallic luster after being independently subjected to the gold stamping and embossing process, and the surfaces of the fibers with circular cross sections have dull metallic luster. After the embossing process treatment is carried out, only the triangular fiber fabric can keep full metal luster of the gold stamping patterns, and the polyester fabric made of the fibers with the pentagonal cross sections can be used for preparing clear embossing patterns, but the metal luster of the gold stamping patterns is dull; after the polyester fabric made of the fibers with the triangular hollow cross sections is subjected to embossing process treatment, the edges of embossed patterns are fuzzy, and the original gold stamping patterns are dull and dull in color.
Then, the three kinds of terylene fabrics which are subjected to gold stamping printing and embossing are subjected to household washing for 15 times, so that the terylene fabrics which are made of fibers with triangular cross sections and still maintain the gold stamping patterns with full gloss and clear embossing patterns can be seen, and the patterns are not changed relative to the terylene fabrics before washing; the gold stamping patterns and the embossing patterns of the washed polyester fabrics made of the fibers with the cross sections of pentagons are not changed; the polyester fabric made of the fiber with the cross section of the triangular hollow type becomes seriously blurred after being washed.
The final pattern effect of fabrics made of different fibers is different after the same process treatment, mainly because the distribution of metal coatings on the surfaces of different fibers and the effect of the metal coatings on light rays are different.
In the process of gold stamping printing, the glue coating on the gold stamping mould paper is heated to become strong in viscosity and firmly acts with the surface of the fiber, so that the metal coating is uniformly and fully adhered to the surface of the polyester fabric. And meanwhile, the viscosity of the separation coating becomes low by heating, so that the metal coating is separated from the separation coating. For triangular fibers, pentagonal fibers and triangular hollow fibers, the metal plating layer is adhered to the surface of the fibers and is distributed in a continuous and smooth plane, and forms continuous mirror reflection on light rays to present full metal luster; for round fibers, the metal plating layer is adhered to the surface of the fiber and distributed in a curved surface, so that light is diffusely reflected, and the metal luster is dull.
And then in the subsequent embossing process, the fiber of the polyester fabric is pressed and heated, and under the action of the roller engraved with the pattern, the area of the surface of the polyester fabric, which is contacted with the pattern in the roller, forms a concave-convex pattern. For the triangular fiber, although the glue coating is melted after being heated, the flowability is increased, but the triangular fiber has a stable structure and cannot deform when being pressed and heated, so that the glue coating cannot be extruded, the distribution of the glue coating on the surface of the triangular fiber cannot be changed, and the distribution of the metal coating on the surface of the triangular fiber cannot be changed, thereby keeping the full metallic luster of the original gold stamping pattern.
For the pentagonal fiber, after the gold stamping printing, two or three corners of the pentagonal fiber on the surface are pressed and bent downwards in the embossing process, so that the glue coating is extruded to cause the uneven distribution of the glue coating, the metal coating is not distributed on partial areas of the surface of the pentagonal fiber, the metal coating can be thickly laminated on partial areas, a continuous and smooth metal coating surface cannot be formed, and compared with the reflection angle of light before the embossing, the continuous mirror reflection of the light cannot be performed, and the diffuse reflection is accompanied, so that the gold stamping pattern becomes dull. In a similar way, for the triangular hollow fiber, the surface of the triangular hollow fiber is seriously extruded, and the structure is inwards sunken, so that the glue coating on the surface of the triangular hollow fiber is extruded, the hollow fiber surface of the metal coating after deformation cannot form a continuous and smooth plane, continuous mirror reflection can not be carried out on light rays like before embossing, and therefore, the gold stamping pattern can become dull. For round fibers, the fibers are not deformed after being pressed in the embossing process, the metal plating layer is still distributed in a curved surface form after being adhered to the surfaces of the fibers, the light is kept to be subjected to diffuse reflection, and the phenomenon that the metal luster is dull is not improved.
Example 2
Generally, the bigger the pressure applied in the embossing process is, the clearer the embossed pattern is, but at the same time, the bigger the embossing pressure is, the more the gold stamping pattern is seriously extruded, and the gloss of the gold stamping pattern may become dark, and the practice also reflects that in the embossing process after the gold stamping printing of the embodiment 1, the embossing pressure which the gold stamping pattern can bear is limited, and the gold stamping pattern on the triangular fiber fabric has a tendency of becoming dark and dull after the embossing pressure exceeds a certain value. The applicant has therefore tried to reduce the forces acting between the embossing cylinder and the bronzing pattern, in hopes of increasing the embossing pressure and slowing down the pressing of the embossing pressure on the bronzing pattern. In the same way, in view of the fact that the higher the embossing temperature is, the clearer the embossed pattern is, and the higher the embossing temperature is, the higher the fluidity of the glue coating of the gold stamping pattern becomes, so that the metal coating is driven to move, and the gloss of the gold stamping pattern is impressed, the applicant also tries to prevent the embossing heat from being conducted to the glue coating, and hopefully, the embossing temperature can be increased, and the influence of high temperature on the glue coating can be reduced.
The method for embossing after gilding printing in the embodiment 2 comprises the following specific steps:
(1) manufacturing a triangular fiber fabric: the triangular fiber fabric is obtained by spinning the triangular polyester fiber with a triangular cross section into a fabric.
(2) Gold stamping and printing: after the triangular fiber fabrics and the stamping mould paper are respectively attached, the triangular fiber fabrics and the stamping mould paper are put into a drum-type stamping machine in an open width mode and move at the speed of 20 m/min.
As shown in fig. 2, the hot stamping paper includes a PE film base layer 10, a release coating layer 20 fixed on the PE film base layer, and a magnetic layer 30, a metal plating layer 40, a thermal insulation layer 50 and a glue coating layer 60 sequentially stacked on the release coating layer. The separating coating is a silicone resin layer with gradually weakened viscosity along with temperature rise; the magnetic layer is made of iron oxide magnetic materials such as ferroferric oxide; the metal coating is made of aluminum; the heat insulation layer is made of organic silicon heat insulation materials such as methyl polysiloxane, methyl phenyl polysiloxane, vinyl polysiloxane and the like; the glue coating is a thermosensitive adhesive layer with gradually-increased viscosity along with temperature rise, and is adhered to the surface of the polyester fabric.
And adjusting the operating parameters of the gilding press, and applying 4 tons of pressure and 135 ℃ to the triangular fiber fabric and the gilding paper to enable the gilding magnetic layer, the metal coating, the heat insulation layer and the glue coating on the gilding paper to be adhered to the surface of the polyester fabric to form gilding patterns.
(3) Stripping the gilding mould paper base layer: and after finishing the gold stamping printing, rolling the triangular fiber fabric and the gold stamping mould paper together, putting the triangular fiber fabric and the gold stamping mould paper into an oven, cooling for 24 hours at 50 ℃, and stripping the PE film base layer and the separation coating of the gold stamping mould paper from the surface of the triangular fiber fabric.
(4) Embossing: and (3) putting the triangular fiber fabric processed in the step (3) into a rolling type embossing machine in an open width mode at a moving speed of 20m/min, and applying pressure and heat to the surface of the triangular fiber fabric by a roller which is engraved with patterns and has the same magnetism as the magnetic layer on the gilding film paper under the conditions that the pressure is 4 tons, the temperature is 180 ℃, 195 ℃, 215 ℃, 230 ℃ and 250 ℃ or the temperature is 195 ℃ and the pressure is 3.75 tons, 4 tons, 4.25 tons, 4.5 tons and 4.75 tons to form concave-convex patterns, namely embossing patterns on the surface of the polyester fabric. Wherein the patterned magnetic layer is magnetically identical to the magnetic layer. And rolling the triangular fiber fabric after embossing.
(5) Acid washing: and cleaning the magnetic layer on the surface of the triangular fiber fabric by using concentrated nitric acid with the concentration of 68-98% at normal temperature.
The magnetic layer in the process can be arranged between the separation coating and the metal coating, and can also be independent of the gilding paper, namely after finishing gilding printing and stripping the basal layer of the gilding paper, the magnetic material is coated on the surface of a gilding pattern, and then subsequent embossing and acid washing treatment are carried out.
By comparison, the applicant performs the embossing process treatment test after the gold stamping printing on the triangular fiber fabric under the conditions of different embossing pressures and embossing temperatures without the magnetic layer and the heat insulation layer, and the sensory evaluation result of the pattern after the magnetic layer and the heat insulation layer are added is as follows:
the results show that without the magnetic layer and the thermal insulation layer, the bronzing pattern starts dull in metallic luster when the embossing temperature is increased to 230 ℃ and the embossing pressure is increased to 4.5 tons; after the magnetic layer and the heat insulation layer are added, the fabric still can keep the metal luster of the gold stamping pattern full under the embossing pressure of 4.75 tons and the embossing temperature of 250 ℃ after the gold stamping printing; in addition, in practice, the embossing traces of the embossing patterns are more obvious and the embossing patterns are clearer at the embossing temperatures of 230 ℃, 250 ℃ and 270 ℃ and the embossing pressure of more than 4 tons.
On one hand, the magnetic layer on the gold stamping pattern and the roller with the same magnetism repel each other, so that the extrusion of the gold stamping pattern and the triangular fiber is slowed down, the actual pressure of the gold stamping pattern and the triangular fiber is lower than the theoretically applied pressure, the condition of uneven distribution caused by displacement of a metal coating is avoided, and the full metallic luster of the gold stamping pattern is kept. On the other hand, the heat insulating layer can prevent heat from being transferred to the glue coating, the actual heat that the glue coating receives is less than the heat that applies theoretically, avoids the glue coating to be heated mobility grow and takes place the displacement and probably leads to the inhomogeneous condition of metal coating distribution to can keep the full metallic luster of original gilt pattern. Meanwhile, in the area without the magnetic layer and the heat insulation layer outside the gold stamping pattern, the actual embossing pressure and embossing temperature of the fabric are the same as the theoretically applied pressure and temperature, the fabric is extruded more seriously under higher pressure and temperature, more obvious concave-convex marks are shown, and the embossing pattern is clearer.
Compared with the prior art, the polyester fabric with the cross section made of the triangular fibers is selected for embossing after gold stamping printing, the metal coating is uniformly and fully adhered to the surfaces of the triangular fibers in the gold stamping printing process, the triangular fibers are not deformed in the subsequent embossing process, the distribution of the metal coating forming the gold stamping patterns is not changed, the continuous and smooth metal coating surface is still kept, and the full metal luster of the gold stamping patterns can be kept. In the embossing process, the extrusion of the embossing pressure on the gold stamping patterns is slowed down by using repulsive force between the magnetic layer and the roller, so that the displacement of a metal coating is avoided; the heat insulating layer is utilized to prevent heat from being transferred to the glue coating, and the situation that the metal coating is not uniformly distributed due to the fact that the glue coating is heated and has large fluidity to cause displacement is further prevented, so that the metal coating keeps smooth and uniform planar distribution on the surface of the fabric, and the full metal luster of the gold stamping patterns is kept. In addition, the fabric is finally cleaned by using concentrated nitric acid, and the concentrated nitric acid can dissolve iron oxide materials serving as magnetic layers, so that the metal coating is exposed on the outermost layer and better reflects light, and the gold stamping patterns show full metal luster; meanwhile, concentrated nitric acid does not react with the polyester fabric and the metal coating aluminum at normal temperature and does not damage the polyester fabric and the metal coating aluminum.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. A method for re-embossing after gold stamping printing is characterized by comprising the following steps:
s1 preparing a triangular fiber fabric: spinning polyester triangular fibers with triangular cross sections into fabrics to obtain triangular fiber fabrics;
s2 gold stamping: the triangular fiber fabric and the hot stamping mould paper are bonded and heated and pressed, and a hot stamping pattern is formed on the surface of the triangular fiber fabric;
the hot stamping die paper comprises a film base layer, a separation coating fixed on the film base layer, and a magnetic layer, a metal coating, a heat insulation layer and a glue coating which are sequentially stacked on the separation coating, wherein the separation coating is an organic silicon resin layer with gradually weakened viscosity along with temperature rise; the glue coating is a thermosensitive adhesive layer with gradually-increased viscosity along with temperature rise, and is attached to the surface of the triangular fiber fabric;
after the separation coating is heated, the viscosity of the separation coating is reduced to separate the metal coating from the film substrate, and after the glue coating is heated, the viscosity of the glue coating is enhanced to adhere the magnetic layer, the metal coating, the heat insulation layer and the glue coating to the surface of the polyester fabric to form a gold stamping pattern;
s3 embossing: and applying heat and pressure on the surface of the polyester fabric subjected to gold stamping printing by using an embossing die engraved with patterns, wherein the embossing die has the same magnetism as the magnetic layer, and cleaning the magnetic layer on the surface of the triangular fiber fabric by using acid to obtain the embossing patterns.
2. The method for re-embossing after gold stamping printing according to claim 1, characterized in that: alternatively, the magnetic layer is independent of the stamping paper, that is, after the gold stamping printing is completed and the base layer of the stamping paper is peeled off, the magnetic material is coated on the surface of the gold stamping pattern, and then the subsequent embossing and pickling processes are performed, and the embossing mold in the step S3 has the same magnetism as the magnetic layer.
3. The method for re-embossing after gold stamping printing according to claim 1 or 2, characterized in that: the magnetic layer is made of iron oxide magnetic materials, the metal coating is aluminum, the acid is concentrated nitric acid, and the acid washing is carried out at normal temperature.
4. The method for re-embossing after gold stamping printing according to claim 3, characterized in that: the heat insulation layer is an organic silicon heat insulation material.
5. The method for re-embossing after gold stamping printing according to claim 3, characterized in that: the heat insulation layer is one or more than one of methyl polysiloxane, methyl phenyl polysiloxane and vinyl polysiloxane.
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Denomination of invention: A method of embossing after hot stamping printing Granted publication date: 20210803 Pledgee: Guangzhou Bank Co.,Ltd. Guangzhou Fangcun Branch Pledgor: GUANGZHOU SHENGQIN INDUSTRIAL Co.,Ltd. Registration number: Y2025980018111 |