CN112959579A - Lettering film stripping skin and preparation method thereof - Google Patents
Lettering film stripping skin and preparation method thereof Download PDFInfo
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- CN112959579A CN112959579A CN202110141055.4A CN202110141055A CN112959579A CN 112959579 A CN112959579 A CN 112959579A CN 202110141055 A CN202110141055 A CN 202110141055A CN 112959579 A CN112959579 A CN 112959579A
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- polyurethane resin
- layer slurry
- lettering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/12—Spreading-out the material on a substrate, e.g. on the surface of a liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/10—Removing layers, or parts of layers, mechanically or chemically
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses a lettering film stripping leather and a preparation method thereof, belonging to the technical field of artificial leather, wherein the preparation method comprises the following steps: coating the bottom layer slurry on release cloth, solidifying, washing with water for multiple times, extruding, and drying to obtain a bottom layer film; coating the surface layer slurry on release paper, then attaching the release paper to the bottom layer film, and drying and then stripping the release paper and the release cloth; the bottom layer slurry comprises polyether polyurethane resin, dimethyl formamide, a foam cell regulator, a filling material and color paste; the surface layer slurry comprises polyurethane resin, dimethyl formamide, a solvent, a waterproof agent, a slip agent and color paste. The preparation method is simple in process and easy to operate, the raw material cost is low, the prepared lettering film stripping skin is light in weight, soft and high in thickness, a foundation is provided for cutting and slicing, and the obtained lettering film stripping skin can show an obvious three-dimensional effect after cutting and slicing.
Description
Technical Field
The invention belongs to the technical field of artificial leather, and particularly relates to a preparation method of an engraved film stripping leather.
Background
The artificial leather is generally a material with texture and hand feeling like natural leather prepared by coating polyvinyl chloride, polyurethane or organic silicon as a main raw material on a fabric material after adding an auxiliary agent. Such artificial leathers require a base fabric provided with a bottom layer. The stripping leather is different from the conventional artificial leather, does not contain base cloth due to different application fields, and can be used for preparing trademarks, patterns and words to be attached to shoes, clothes and bags. Although the materials of the lettering film without the base cloth are prepared by the silica gel at present, the lettering film prepared by the silica gel has the problems of higher cost, poor hydrolysis resistance and hard and soft materials. When the hydrolysis resistance is poor, especially when the lettering film is arranged on the clothes, because the clothes often need the characteristic of washing, the poor hydrolysis resistance can cause the problems that the peel is easy to crack, the service life is short, and the quality of the clothes is influenced. Meanwhile, the thickness of the stripping skin of the lettering film is difficult to increase because the stripping skin does not depend on the base cloth, the thickness is usually 0.3-0.4mm and is difficult to reach more than 0.5mm, but the effect presented after cutting and lettering is not good because of the low thickness, and the three-dimensional effect cannot be presented.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: provides a preparation method of a carving film stripping skin which is high in thickness, suitable for carving characters and resistant to hydrolysis.
In order to solve the technical problems, the invention adopts the technical scheme that: a preparation method of a lettering film stripping skin comprises the following steps:
step 1, coating bottom layer slurry on release cloth, then solidifying, washing and extruding for multiple times, and finally drying to obtain a bottom layer film;
the solidification is carried out by immersing the glass fiber into a dimethylformamide aqueous solution, and the solidification speed is 3.8-4.3 m/min;
the water washing is to soak in water at the temperature of 80-85 ℃, and after each water washing, the water is removed by extrusion and then the next water washing is carried out;
step 2, coating the surface layer slurry on release paper, then attaching the release paper to the bottom layer film, and drying and then stripping the release paper and the release cloth;
the bottom layer slurry comprises polyether polyurethane resin, dimethyl formamide, a foam cell regulator, a filling material and color paste;
the surface layer slurry comprises polyurethane resin, dimethyl formamide, a solvent, a waterproof agent, a slip agent and color paste.
The other technical scheme adopted by the invention is as follows: the lettering film stripping skin prepared by the preparation method of the lettering film stripping skin.
The invention has the beneficial effects that: (ii) a According to the preparation method of the lettering film stripping skin, provided by the invention, through improvement on the preparation method, the speed in the solidification process and the washing temperature are strictly controlled, the thickness of the obtained lettering film stripping skin can be obviously improved and is far higher than that of the existing stripping skin, a foundation is provided for cutting and cutting, and the obtained lettering film stripping skin can show an obvious three-dimensional effect after cutting and cutting; meanwhile, compared with the traditional silica gel lettering film, the lettering film stripping skin prepared by the method is softer in hand feeling, can be matched with the soft characteristic of clothes after being arranged on the shoe clothes, and is lighter in weight compared with the silica gel lettering film under the same thickness.
Drawings
FIG. 1 is a diagram showing a product prepared from an engraved membrane peel skin prepared by the method for preparing an engraved membrane peel skin according to the embodiment of the present invention;
fig. 2 is a diagram showing a product prepared from the lettering film stripping skin prepared by the method for preparing the lettering film stripping skin according to the embodiment of the invention.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The invention provides a preparation method of a lettering film stripping skin, which comprises the following steps:
step 1, coating bottom layer slurry on release cloth, then solidifying, washing and extruding for multiple times, and finally drying to obtain a bottom layer film;
the solidification is carried out by immersing the glass fiber into a dimethylformamide aqueous solution, and the solidification speed is 3.8-4.3 m/min;
the water washing is to soak in water at the temperature of 80-85 ℃, and after each water washing, the water is removed by extrusion and then the next water washing is carried out;
step 2, coating the surface layer slurry on release paper, then attaching the release paper to the bottom layer film, and drying and then stripping the release paper and the release cloth;
the bottom layer slurry comprises polyether polyurethane resin, dimethyl formamide, a foam cell regulator, a filling material and color paste;
the surface layer slurry comprises polyurethane resin, dimethyl formamide, a solvent, a waterproof agent, a slip agent and color paste.
From the above description, the beneficial effects of the present invention are: according to the preparation method of the lettering film stripping skin, the bottom layer of the lettering film stripping skin is prepared by a wet method, the surface layer of the lettering film stripping skin is prepared by a dry method, and meanwhile, the thickness of the obtained lettering film stripping skin is improved by improving the preparation method and strictly controlling the speed in the solidification process and the washing temperature, so that the obtained lettering film stripping skin can show an obvious three-dimensional effect after being cut and cut; meanwhile, compared with the traditional silica gel lettering film, the lettering film stripping skin prepared by the method is softer in hand feeling, can be matched with the soft characteristic of clothes after being arranged on the shoe clothes, and is lighter in weight compared with the silica gel lettering film under the same thickness.
Further, the drying temperature in the step 1 is 90-100 ℃.
Further, the drying temperature in the step 2 is 125-135 ℃.
From the above description, it can be seen that although the drying time is increased compared to the high temperature drying, the obtained exfoliated cortex is compact and the cell distribution is more uniform.
Further, the dimethylformamide aqueous solution is 25-30% by volume of dimethylformamide aqueous solution.
From the above description, it can be seen that too high or too low a concentration of the aqueous solution of dimethylformamide affects the thickness of the resulting peel.
Further, the mass ratio of the polyether polyurethane resin to the dimethyl formamide in the bottom layer slurry is 6:1, the addition amount of the foam regulator is 2-3 wt% of the total mass of the polyether polyurethane resin, and the addition amount of the filler is 4-6 wt% of the total mass of the polyether polyurethane resin.
Further, the cell regulator is DP-542 cell regulator.
Further, the filler is a mixture of wood powder and volcanic ash with a mass ratio of 8:2, and the particle size of the wood powder and the particle size of the volcanic ash are 1200-1500 meshes.
As can be seen from the above description, the simultaneous addition of the cell regulator and the filler can obtain uniform cells of the underlayer film, and the cells can be prevented from collapsing when being matched with the filler, so that the thickness of the underlayer film after coating can be kept substantially unchanged. The thickness of the peeled peel finished product can be obviously influenced by the selection of the cell regulator and the selection of the filler, the thickness of the obtained peeled peel can be further improved by adding the volcanic ash in a certain proportion in the traditional wood powder, and meanwhile, the particle size of the wood powder and the particle size of the volcanic ash are found to be better when the particle size is 1200-1500 meshes, and the effects of improving the uniformity of cells and preventing the cells from collapsing by matching with the cell regulator cannot be achieved when the particle size is too large.
Further, the solvent in the surface layer slurry is one or two of methyl acetate and butyl acetate.
Further, the mass ratio of the polyurethane resin, the dimethylformamide and the solvent in the surface layer slurry is 10:3:7, the addition amount of the waterproof agent is 2-3% of the total mass of the polyurethane resin, and the addition amount of the slip agent is 2-3% of the total mass of the polyurethane resin.
Further, the water repellent is fluororesin.
Further, the slip agent is Silcona GLIDE T-520 slip agent in Germany.
From the above description, it can be seen that the addition of a proper amount of a slip agent can obtain a peeled skin with smooth hand feeling, and the selection and addition of a waterproof agent can make the obtained peeled skin suitable for a long-term washing environment without problems such as cracking and bubbling.
Furthermore, the adding amount of the color paste in the bottom layer slurry is 0.2-10 wt% of the total mass of the polyether polyurethane resin, and the adding amount of the surface layer slurry color paste is 0.2-10 wt% of the total mass of the polyurethane resin.
The color paste in the two components is mainly adjusted according to the required color, and can be increased or decreased to a certain extent outside the range according to the requirement.
The invention provides a lettering film stripping skin prepared by the preparation method of the lettering film stripping skin.
Example 1:
a preparation method of a lettering film stripping skin comprises the following steps:
step 1, mixing polyether polyurethane resin and dimethyl formamide according to a mass ratio of 6:1, then adding DP-542 leather foam hole regulator which accounts for 3 wt% of the total mass of the polyether polyurethane resin, filler which accounts for 5 wt% of the total mass of the polyether polyurethane resin and yellow color paste which accounts for 2 wt% of the total mass of the polyether polyurethane resin, fully dispersing and uniformly mixing to obtain bottom layer slurry;
the filler is a mixture of wood powder and volcanic ash with a mass ratio of 8:2, and the particle size of the wood powder and the particle size of the volcanic ash are 1200 meshes;
step 2, coating the bottom layer slurry on release cloth, adjusting the coating thickness to be 5mm, then solidifying, washing with water for multiple times, extruding, and finally drying at 90 ℃ to obtain a bottom layer film;
the solidification is carried out by immersing the glass fiber into a DMF aqueous solution with the volume percentage of 28 percent, and the solidification speed is 3.8 m/min;
the water washing is to soak in 82 ℃ water, and after each water washing, the water is removed by extrusion and then the next water washing is carried out;
step 3, mixing polyurethane resin, dimethyl formamide and methyl acetate according to the mass ratio of 10:3:7, then adding 2.5 wt% of F5/S high-purity fluororesin, 3 wt% of German Silcona GLIDE T-520 slip agent and 1.5 wt% of red color paste, and fully dispersing and uniformly mixing to obtain surface layer slurry;
and 4, coating the surface layer slurry on release paper, adjusting the coating thickness to be 4mm, then attaching the release paper and the bottom layer film, drying at 125 ℃, and then stripping the release paper and the release cloth to obtain the lettering film stripping skin.
The marking film peel skin obtained in example 1 was used for marking and cutting, and the effect was shown in the uppermost hook-shaped trademark pattern of fig. 1.
Example 2:
a preparation method of a lettering film stripping skin comprises the following steps:
step 1, adding polyether polyurethane resin and dimethylformamide in a mass ratio of 6:1 into a reaction kettle, mixing, adding DP-542 leather bubble regulator accounting for 2.5 wt% of the total mass of the polyether polyurethane resin, filler accounting for 4 wt% of the total mass of the polyether polyurethane resin and orange color paste accounting for 2.5 wt% of the total mass of the polyether polyurethane resin, and fully dispersing and uniformly mixing to obtain bottom layer slurry;
the filler is a mixture of wood powder and volcanic ash with a mass ratio of 8:2, and the particle size of the wood powder and the particle size of the volcanic ash are 1500 meshes;
step 2, coating the bottom layer slurry on a release cloth on a coating platform, adjusting the coating thickness of the coating platform to be 4mm, and then soaking the coating platform into a solidification tank filled with 25% (volume percentage) of DMF (dimethyl formamide) aqueous solution for solidification, wherein the solidification speed is 4 m/min; washing and extruding for many times after solidification until DMF is washed out, and finally drying at 100 ℃ to obtain a bottom layer film;
the water washing is to soak in tap water at 80 ℃, and after each water washing, the water is removed by extrusion and then the next water washing is carried out;
step 3, adding polyurethane resin, dimethylformamide and a solvent into a reaction kettle according to the mass ratio of 10:3:7, mixing, then adding 3 wt% of F5/S high-purity fluororesin, 2 wt% of German Silcona GLIDE T-520 slip agent and 3 wt% of green color paste, and fully dispersing and uniformly mixing to obtain surface layer slurry;
the solvent is prepared from the following components in a mass ratio of 1: 1 butyl acetate and methyl acetate;
and 4, coating the surface layer slurry on release paper, adjusting the coating thickness to be 5mm, then attaching the release paper and the bottom layer film, drying at 130 ℃, and then stripping the release paper and the release cloth to obtain the lettering film stripping skin.
The carving film obtained in example 2 is used for peeling off the skin for carving characters and is thermally stuck on the canvas, the effect is shown in figure 2, the effect is that the membrane has a certain thickness, and orange and green form a sharp contrast and present a remarkable 3D stereoscopic impression.
Example 3:
a preparation method of a lettering film stripping skin comprises the following steps:
step 1, adding polyether polyurethane resin and dimethylformamide in a mass ratio of 6:1 into a reaction kettle, mixing, adding DP-542 leather bubble regulator accounting for 2 wt% of the total mass of the polyether polyurethane resin, filler accounting for 6 wt% of the total mass of the polyether polyurethane resin and yellow color paste accounting for 2 wt% of the total mass of the polyether polyurethane resin, and fully dispersing and uniformly mixing to obtain bottom layer slurry;
the filler is a mixture of wood powder and volcanic ash with a mass ratio of 8:2, and the particle size of the wood powder and the particle size of the volcanic ash are 1300 meshes;
step 2, coating the bottom layer slurry on a release cloth on a coating platform, adjusting the coating thickness of the coating platform to be 5mm, and then soaking the coating platform into a coagulating tank filled with 30% (volume percentage) of DMF (dimethyl formamide) aqueous solution for coagulation, wherein the coagulation speed is 4.3 m/min; washing and extruding for many times after solidification until DMF is washed out, and finally drying at 95 ℃ to obtain a bottom layer film;
the water washing is to soak in tap water at 85 ℃, and after each water washing, the water is removed by extrusion and then the next water washing is carried out;
step 3, adding polyurethane resin, dimethylformamide and butyl acetate in a reaction kettle according to the mass ratio of 10:3:7, mixing, then adding 3 wt% of F5/S high-purity fluororesin, 2.5 wt% of German Silcona GLIDE T-520 slip agent and 1.5 wt% of blue color paste, and fully dispersing and uniformly mixing to obtain surface layer slurry;
step 4, coating the surface layer slurry on release paper, adjusting the coating thickness to be 4mm, then attaching the release paper and the bottom layer film, drying at 135 ℃, and then stripping the release paper and the release cloth to obtain an engraved film stripping skin;
the lettering and cutting were carried out using the lettering film peel-off peel obtained in example 3, and the effect was seen in fig. 1, second from top to bottom, on a hook-shaped trademark pattern.
Example 4:
example 2 is different from example 2 in that the color paste added to the bottom layer paste of example 4 is a green color paste (2.2 wt% of the total mass of the polyether polyurethane resin), and the color paste added to the surface layer paste is a black color paste (1 wt% of the total mass of the polyurethane resin).
The lettering and cutting were carried out using the lettering film peel skin obtained in example 4, and the effect was shown in fig. 1, third from top to bottom, on a hook-shaped trademark pattern.
The lettering film stripping skin obtained in the examples 1-4 meets the standard GB/T8949-2008 by detection.
Comparative example 1:
comparative example 1 differs from example 2 only in that the solid velocity of comparative example 1 is 8 m/min.
Comparative example 2:
comparative example 2 differs from example 2 only in that the water wash of comparative example 1 is a soak in tap water at 30 ℃.
Comparative example 3:
the comparative example 3 differs from example 2 only in that the filler of the comparative example 1 is 1500 mesh wood flour.
Comparative example 4:
comparative example 4 differs from example 2 only in that the cell regulator of comparative example 1 is Dow Corning DC190 cell regulator.
The thickness of the engraved film peeled skins obtained in examples 1 to 4 and comparative examples 1 to 4 was measured using the same leather thickness meter, three for each measurement, and the results were averaged. The results are shown in Table 1.
TABLE 1
It can be seen that the thickness of the obtained release skin can be significantly increased by adjusting the process in the preparation method and using the cell regulator and the filler in a matching manner.
In conclusion, the cost of the raw materials used in the preparation method of the lettering film stripping skin provided by the invention is lower than that of the silica gel stripping skin, the preparation method combines a wet method and a dry method to prepare the double-layer stripping film, and different color pastes are selected when the two layers of stripping films are prepared, so that the contrast of the lettering film stripping skin can be obviously increased, and the visual three-dimensional effect is improved; meanwhile, the thickness of the stripping skin of the obtained lettering film can be obviously improved by improving the preparation method and strictly controlling the speed in the solidification process and the washing temperature, and the thickness of the finished stripping skin can be obviously influenced after the foaming regulator and the filler are matched for use, so that the thickness of the obtained stripping skin reaches more than 0.8mm and is far higher than that of the existing stripping skin by 0.3-0.5mm, a foundation is provided for cutting and cutting, and the obtained lettering film stripping skin can show an obvious three-dimensional effect after cutting and cutting; compared with the traditional silica gel lettering film, the lettering film stripping skin prepared by the preparation method provided by the invention has softer hand feeling, can be matched with the soft characteristic of clothes after being arranged on the shoe and clothes, and has lighter weight compared with the silica gel lettering film under the same thickness.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (10)
1. The preparation method of the lettering film stripping skin is characterized by comprising the following steps:
step 1, coating bottom layer slurry on release cloth, then solidifying, washing and extruding for multiple times, and finally drying to obtain a bottom layer film;
the solidification is carried out by immersing the glass fiber into a dimethylformamide aqueous solution, and the solidification speed is 3.8-4.3 m/min;
the water washing is to soak in water at the temperature of 80-85 ℃, and after each water washing, the water is removed by extrusion and then the next water washing is carried out;
step 2, coating the surface layer slurry on release paper, then attaching the release paper to the bottom layer film, and drying and then stripping the release paper and the release cloth;
the bottom layer slurry comprises polyether polyurethane resin, dimethyl formamide, a foam cell regulator, a filling material and color paste;
the surface layer slurry comprises polyurethane resin, dimethyl formamide, a solvent, a waterproof agent, a slip agent and color paste.
2. The method for preparing the lettering film stripping skin as claimed in claim 1, wherein the aqueous solution of dimethylformamide is 25-30% by volume.
3. The method for preparing the lettering membrane stripping skin as claimed in claim 1, wherein the mass ratio of the polyether polyurethane resin to the dimethylformamide in the bottom layer slurry is 6:1, the addition amount of the cell regulator is 2-3% of the total mass of the polyether polyurethane resin, and the addition amount of the filler is 4-6% of the total mass of the polyether polyurethane resin.
4. The method for preparing the lettering film stripping skin as claimed in claim 1, wherein the solvent in the surface layer slurry is one or two of butyl acetate and methyl acetate.
5. The method for preparing the lettering film stripping skin as claimed in claim 4, wherein the mass ratio of the polyurethane resin, the dimethylformamide and the solvent in the surface layer slurry is 10:3:7, the addition amount of the waterproof agent is 2-3% of the total mass of the polyurethane resin, and the addition amount of the slip agent is 2-3% of the total mass of the polyurethane resin.
6. The method for preparing the lettering film release skin according to claim 1, wherein the cell regulator is a DP-542 cell regulator.
7. The method for preparing the lettering film stripping skin as claimed in claim 1, wherein the filler is a mixture of wood powder and volcanic ash in a mass ratio of 8: 2.
8. The method for producing an engraved film release sheet according to claim 1, characterized in that the water repellent agent is a fluororesin.
9. The method of claim 1, wherein the slip agent is GLIDE T-520 slip agent.
10. A lettering film release sheet obtained by the method for producing a lettering film release sheet according to any one of claims 1 to 9.
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| CN202110141055.4A CN112959579B (en) | 2021-02-02 | 2021-02-02 | Lettering film stripping skin and preparation method thereof |
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| CN109468853A (en) * | 2018-09-21 | 2019-03-15 | 浙江禾欣新材料有限公司 | A kind of preparation method of the high antifungal gene polyurethane leather of two-sided foaming |
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| US20020022106A1 (en) * | 2000-04-28 | 2002-02-21 | Sanyo Kakoshi Kabushiki Kaisha | Mold releasable composite material for wet production of polyurethane resin synthetic leather |
| CN101671962A (en) * | 2009-09-30 | 2010-03-17 | 安徽安利合成革股份有限公司 | Method for producing ultrawear-resistant high-elastic ball leather |
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| CN112959579B (en) | 2022-12-16 |
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