CN115679712A - Preparation process of high-color-fastness imitation leather local gold stamping fabric - Google Patents
Preparation process of high-color-fastness imitation leather local gold stamping fabric Download PDFInfo
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- CN115679712A CN115679712A CN202211311207.1A CN202211311207A CN115679712A CN 115679712 A CN115679712 A CN 115679712A CN 202211311207 A CN202211311207 A CN 202211311207A CN 115679712 A CN115679712 A CN 115679712A
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- 239000004744 fabric Substances 0.000 title claims abstract description 93
- 239000010985 leather Substances 0.000 title claims abstract description 31
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000010931 gold Substances 0.000 title claims abstract description 20
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000010023 transfer printing Methods 0.000 claims abstract description 51
- 230000002745 absorbent Effects 0.000 claims abstract description 28
- 239000002250 absorbent Substances 0.000 claims abstract description 28
- 229920000728 polyester Polymers 0.000 claims abstract description 22
- 238000012546 transfer Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000007639 printing Methods 0.000 claims abstract description 15
- 239000000986 disperse dye Substances 0.000 claims abstract description 11
- 238000007731 hot pressing Methods 0.000 claims abstract description 9
- 239000000975 dye Substances 0.000 claims abstract description 7
- 238000000859 sublimation Methods 0.000 claims abstract description 4
- 230000008022 sublimation Effects 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 90
- 239000004814 polyurethane Substances 0.000 claims description 38
- 229920002635 polyurethane Polymers 0.000 claims description 38
- 239000011248 coating agent Substances 0.000 claims description 26
- 210000000078 claw Anatomy 0.000 claims description 24
- 230000007306 turnover Effects 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000002518 antifoaming agent Substances 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 12
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- 239000004721 Polyphenylene oxide Substances 0.000 claims description 10
- 229920000570 polyether Polymers 0.000 claims description 10
- 239000002562 thickening agent Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
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- -1 polysiloxane Polymers 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229920004933 Terylene® Polymers 0.000 claims description 3
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- 238000004040 coloring Methods 0.000 claims description 3
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- 238000002156 mixing Methods 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 239000012964 benzotriazole Substances 0.000 claims description 2
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 6
- 229920000642 polymer Polymers 0.000 abstract description 4
- 239000002904 solvent Substances 0.000 abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 2
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- 238000003892 spreading Methods 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
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Abstract
The invention discloses a preparation process of a high-color-fastness imitation leather local gold stamping fabric, which adopts sublimation transfer printing, selects proper disperse dye, solvent such as aleurone, alcohol, benzene and the like and resin to grind and mix into printing ink, and prints the printing ink on tough paper to prepare transfer paper; during printing, the surface of the transfer paper with the color paste is overlapped with the fabric, and the disperse dye is sublimated into a gaseous state through high-temperature hot pressing and is transferred to the fabric from the paper. After printing, no water washing treatment is needed, so that no sewage is produced, and the effects of bright color, clear gradation and delicate flower shape can be obtained. The ultraviolet absorbent is added in the transfer printing, the performance of the ultraviolet absorbent is superior to that of other chromophores in polymer molecules, the ultraviolet absorbent can selectively and strongly absorb ultraviolet rays and convert the ultraviolet rays into low-energy radiation, so that the damage of the ultraviolet rays to fabrics and dyes is avoided, and the ultraviolet absorbent can be transferred to polyester fabrics along with disperse dyes through high-temperature hot pressing.
Description
Technical Field
The invention belongs to the field of imitation leather fabrics, and particularly relates to a preparation process of an imitation leather local gold stamping fabric with high color fastness.
Background
With the increasing environmental pollution, the ozone layer is damaged more and more seriously, so that the ultraviolet radiation irradiating the earth surface is increased more and more obviously, especially the more damaging short wavelength ultraviolet rays are increased, and the textile materials used outdoors face more and more serious threats. The radiation of a large amount of ultraviolet rays, especially short wavelength ultraviolet rays, causes the fading phenomenon of textiles to be intensified, so that the requirement on the light color fastness of outdoor textiles is higher.
Because of its high strength and various dyeings and printing fastnesses, terylene is widely used in the fields of automobile interior trim, plateau and marine work clothes, curtains and the like which have higher requirements on the light fastness of fabrics. For example, polyester fabrics account for approximately 80% of automotive interior textiles. Although the light fastness of the colored polyester fabric is higher than that of other fabrics, some processing methods must be adopted to further improve the light fastness when the colored polyester fabric is used in certain occasions with strict requirements on the light fastness. Therefore, the development of the ultraviolet absorbent transfer printing process with high color fastness is of great significance.
Disclosure of Invention
Aiming at the defects in the prior art, the ultraviolet absorbent is added into transfer printing, the performance of the ultraviolet absorbent is superior to that of other chromophores in polymer molecules, the ultraviolet absorbent can selectively and strongly absorb ultraviolet rays and convert the ultraviolet rays into low-energy radiation, so that the damage of the ultraviolet rays to fabrics and dyes is avoided, and the ultraviolet absorbent can be transferred to polyester fabrics along with disperse dyes through high-temperature hot pressing, so that the color fastness of the printed fabrics is remarkably improved.
In order to solve the technical problems, the following technical scheme is adopted:
a preparation process of a high-color-fastness imitation leather local gold stamping fabric is characterized by comprising the following steps:
(1) Preparing a disperse dye transfer printing fabric: mixing 6% of ultraviolet absorbent and 4% of dye at room temperature, adding 3% of dispersant NNO, 87% of PVB solution and zirconia beads with the proportion of the ultraviolet absorbent being 1; stirring and dispersing for 15-20h at room temperature under the condition of 1000r/min, and standing for later use after stirring; coating the printing paste on transfer paper at room temperature, immediately drying at 30 ℃, attaching the dried transfer paper and white polyester grey cloth, and performing hot-press transfer printing for 10-30s at 200-230 ℃ to obtain a transfer printing fabric;
(2) Preparing a water-based polyurethane imitation leather coating fabric: sequentially adding water polyurethane, pigment and an auxiliary agent into a beaker, and fully stirring to prepare the water polyurethane imitation leather coloring coating agent; taking a release film, coating a coating agent on the release film, attaching the release film to a transfer printing fabric after blade coating, controlling the curing time to be 10s and the curing temperature to be 110-130 ℃, naturally drying and then peeling the release film to obtain the waterborne polyurethane skin-imitated coating fabric;
(3) Preparing a water-based polyurethane imitation Pi Tuceng local gold stamping fabric: and (3) placing the water-based polyurethane imitation leather coating fabric into a gilding press at about 135 ℃, and gilding at the speed of about 12 m/min.
Preferably, the white terylene grey cloth is pretreated and preshaped.
Preferably, step (1): the PVB solution used is prepared by dissolving polyvinyl butyral in isobutanol or methanol.
Preferably, step (1): the structure of the ultraviolet absorbent is benzotriazole ultraviolet absorbent.
Preferably, step (1): the transfer printing is sublimation transfer printing.
Preferably, step (2): the used auxiliary agents comprise 1 part of thickening agent, 2 parts of wetting agent, 0.2 part of flatting agent and 0.2 part of defoaming agent; the used thickener is one of polyurethane associative rheological agent 212, associative polyurethane thickener 105A or polyurethane thickener 621N; the wetting agent is one of polyether modified organic silicon, modified polysiloxane or organic siloxane copolymer; the used defoaming agent is one of defoaming agent 204, organic silicon defoaming agent PLX-4060 or polyurethane defoaming agent DE-0389; the leveling agent is one of polyether modified polydimethylsiloxane, polyether modified siloxane or polyether polyurethane.
Preferably, step (2): the release film is PET release film.
Further, step (1): the hot-pressing transfer printing is finished in a hot press, and the hot press comprises a base, and a bottom plate mechanism and a pressing plate mechanism which are arranged on the base; the bottom plate mechanism comprises a bottom plate and positioning components arranged on two sides of the bottom plate, and the transfer printing paper is flatly paved on the bottom plate by the positioning components; the pressing plate mechanism comprises a pressing plate, an operation and control assembly, a clamping assembly and a heating assembly, the pressing plate is matched with the bottom plate, the operation and control assembly is connected onto the pressing plate and comprises a support, an upper pressing rod, a lower pressing rod and an operation and control handle, the upper pressing rod and the lower pressing rod are hinged to the support and are connected with each other and move synchronously; the control handle is connected with the upper pressing rod, the lower pressing rod is connected with the pressing plate through the screw pressing piece, the screw pressing piece comprises a knob cover, and the knob cover controls the lower pressing rod to press the pressing plate downwards; the clamping components are arranged on two sides of the pressing plate, and the white polyester grey cloth is laid on the pressing plate; the heating component heats the pressing plate. The hot press is a small-sized hot press, is suitable for the research operation of laboratories such as colleges and universities, research institutes and the like, and has the working process that: a. spreading the transfer paper on a bottom plate, and fixing by a positioning component; b. laying white polyester grey cloth on a pressing plate, and fixing by virtue of a clamping assembly; c. holding the control handle by a laboratory technician and pressing down until the pressing plate is tightly attached to the bottom plate, then screwing the knob cover, and further pressing the pressing plate and the bottom plate tightly; d. starting the heating assembly, starting heating, and carrying out hot-press transfer printing for 10-30s at 200-230 ℃ to finish the transfer printing.
This locating component presss from both sides tightly and fixes transfer paper and white dacron grey cloth with clamping component respectively for both stabilize tiling and align each other, compress tightly both and can realize the transfer printing, need not artificial laminating stamp paper and white dacron grey cloth, and labour saving and time saving, and both laminating are neat, can not appear skew, crisscross scheduling problem, and are beneficial to the transfer printing. The hot press adopts a manual pressing mode, is controlled by the control assembly, does not need to be provided with a movable electric structure, is convenient to manufacture, reduces the cost, and is provided with the screw pressing piece for further pressing the pressing plate and the bottom plate, so that the mutual pressure between the pressing plate and the bottom plate is increased, and the transfer effect is improved. The heating assembly employs a conventional heater for heating the platen.
Furthermore, the positioning assembly comprises a guide rod, a positioning claw and a handle rod, the positioning claw is arranged on the guide rod, and the positioning claw is controlled to press or loosen the transfer printing paper by rotating the guide rod; the handle rod is connected with the guide rod and is used for manually controlling the guide rod to rotate; a torsion spring is arranged in the guide rod and gives resilience force to the guide rod, and the resilience force forces the guide rod to rotate to a position where the positioning claw presses the transfer printing paper; the guide rod is further connected with a clamping piece, the clamping piece is provided with a clamping buckle, the side faces of the two sides of the bottom plate are provided with clamping grooves, and the clamping buckle is matched with the clamping grooves. The positioning assembly consists of a guide rod, positioning claws and a handle rod, wherein the front end and the rear end of the guide rod are respectively hinged with a front end plate and a rear end plate on two sides of the bottom plate, the positioning claws are in an arch shape, 4 positioning claws are regularly arranged on the guide rod, and when the guide rod rotates towards the bottom plate, the positioning claws clamp the transfer printing paper, otherwise, the transfer printing paper is loosened. The handle rod penetrates through the front end plate and is connected with the guide rod, and the handle rod is used for manually controlling the guide rod to rotate directionally. The positioning assembly is simple in structure, can realize positioning, fixing and loosening of the transfer paper in a rotating mode, and is convenient to operate; 4 positioning claws are matched, the positioning and fixing effect is good, and the transfer printing paper is stably attached to the bottom plate; the handle rod facilitates the control of the guide rod by an experimenter, a torsion spring is arranged in the guide rod, and the torsion spring gives resilience force for the guide rod to rotate towards the bottom plate, so that the positioning claw has certain clamping force, and the positioning and fixing effects are improved; due to the existence of the torsion spring, when the guide rod rotates reversely and is loosened, the guide rod also has resilience force, so the clamping piece is arranged to temporarily fix the guide rod, and the design is ingenious.
Furthermore, the clamping assembly comprises a clamping cylinder and a clamping plate, the clamping cylinder is arranged at the upper end of the pressing plate, a connecting rod of the clamping cylinder penetrates through the pressing plate and is connected with the clamping plate at the lower end, and the clamping cylinders arranged in the front and at the back are respectively connected with the front end and the back end of the clamping plate; clamping grooves are formed in the two sides of the pressing plate, and the clamping plate is matched with the clamping grooves to clamp the white polyester grey cloth to enable the white polyester grey cloth to be flatly paved on the pressing plate; the pressure plate is also provided with a turnover cover, the turnover cover is connected to the pressure plate in a turnover way, and the side seam between the pressure plate and the bottom plate is enclosed by the turnover cover; the turnover cover comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are connected in a mutually perpendicular mode, a turnover shaft is connected between the first cover plate and the pressing plate, and the turnover cover is turned over through the turnover shaft. The clamping assembly consists of a clamping cylinder and clamping plates, the clamping cylinders arranged in front and at the back are used for jointly controlling the movement of the clamping plates, when the clamping cylinders extend out, the clamping plates move downwards, a through hole is formed between the clamping plates and a clamping groove, two ends of gray fabric are arranged at the through hole, and after the clamping cylinders retract, the clamping plates are matched with the clamping groove to clamp the gray fabric; this clamping assembly passes through die clamping cylinder fixed, during the tiling, the laboratory technician hold the grey cloth both ends can, convenient operation. The longitudinal section of the flip cover is L-shaped and is formed by connecting a first cover plate and a second cover plate which are perpendicular to each other, after the cover plates are turned downwards, the first cover plate and the second cover plate enclose a side seam between the pressing plate and the bottom plate, and the situation that an experimenter is scalded due to careless touch is prevented.
Due to the adoption of the technical scheme, the method has the following beneficial effects:
the invention adopts sublimation transfer printing, which is to select proper disperse dye, paste powder, alcohol, benzene and other solvents and resin to grind and mix into printing ink, and print the printing ink on tough paper to prepare transfer paper; during printing, the surface of the transfer paper with the color paste is overlapped with the fabric, and the disperse dye is sublimated into a gaseous state through high-temperature hot pressing and is transferred to the fabric from the paper. After printing, no water washing treatment is needed, so that no sewage is produced, and the effects of bright color, clear gradation and delicate flower shape can be obtained.
The ultraviolet absorbent is added in the transfer printing, the performance of the ultraviolet absorbent is superior to that of other chromophores in polymer molecules, the ultraviolet absorbent can selectively and strongly absorb ultraviolet rays and convert the ultraviolet rays into low-energy radiation, so that the damage of the ultraviolet rays to fabrics and dyes is avoided, and the ultraviolet absorbent can be transferred to polyester fabrics along with disperse dyes through high-temperature hot pressing;
as a novel polyurethane system using water to replace an organic solvent as a dispersion medium, the waterborne polyurethane overcomes the defects of low solid content (generally 15-30%) of the traditional solvent type polyurethane, serious environmental pollution and harm to human health in the using process, so that the harm caused by using the solvent type polyurethane can be greatly reduced by selecting the waterborne polyurethane skin-imitated coating, and the skin-imitated local hot stamping fabric with high color fastness and suitable for the outdoors is obtained.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a K/S value comparison chart before and after illumination of a water-based polyurethane imitation leather coating fabric when ultraviolet absorbers are contained;
FIG. 2 is a K/S value comparison graph of a waterborne polyurethane imitation leather coating fabric before and after illumination when no ultraviolet absorber is contained;
FIG. 3 is a schematic view of a hot press;
FIG. 4 is a schematic structural view of a positioning assembly;
FIG. 5 is an enlarged view taken at I in FIG. 4;
FIG. 6 is a schematic view of the clamp assembly;
FIG. 7 is a schematic structural diagram of a control assembly;
fig. 8 is a schematic structural diagram of the flip cover.
Wherein the reference numerals of fig. 1 to 8 are respectively:
the base 1, the locating component 2, the guide rod 21, the locating pawl 22, the handle rod 23, the fastener 24, the fastener 241, the bottom plate 3, the front end plate 31, the rear end plate 32, the heating component 4, the control component 5, the support 51, the upper pressure rod 52, the lower pressure rod 53, the control handle 54, the screw pressing piece 55, the knob cover 551, the pressure plate 6, the clamping groove 61, the clamping component 7, the clamping plate 71, the clamping cylinder 72, the flip cover 8, the first cover plate 81, the second cover plate 82 and the turnover shaft 83.
Detailed Description
Aiming at the defects in the prior art, the invention aims to provide a preparation process of a high-color-fastness imitation leather local gold stamping fabric, an ultraviolet absorbent is added in transfer printing, the performance of the ultraviolet absorbent is superior to that of other chromophores in polymer molecules, the ultraviolet absorbent can selectively and strongly absorb ultraviolet rays and convert the ultraviolet rays into low-energy radiation, so that the damage of the ultraviolet rays to fabrics and dyes is avoided, and the ultraviolet absorbent can be transferred to polyester fabrics along with disperse dyes through high-temperature hot pressing, so that the color fastness of the printed fabrics is obviously improved.
The present invention will be described in detail with reference to specific examples;
example 1
(1) Preparing raw materials: the raw cloth used by the invention is white velvet polyester grey cloth which is pretreated and preshaped;
(2) Preparation of disperse dye transfer printed fabric: mixing 6% of ultraviolet absorbent uv-a and 4% of dye at room temperature, adding 3% of dispersant NNO, 87% of PVB solution and zirconia beads with the ratio of the ultraviolet absorbent being 1; stirring and dispersing for 15-20h at room temperature under the condition of 1000r/min, uniformly stirring printing paste and standing for preparation; and uniformly coating the prepared printing paste on transfer printing paper at room temperature, immediately drying at 30 ℃ for later use, attaching the coated and dried printing paper to white polyester grey cloth to enable the transfer printing paper to face a heating part of a pressing machine, and performing hot-pressing transfer printing for 10-30s at 200-230 ℃ to obtain the transfer printing fabric.
(3) Preparing the water-based polyurethane imitation leather coating fabric: adding water polyurethane, pigment and auxiliary agent into a beaker in sequence, and fully stirring to prepare the waterborne polyurethane imitation leather coloring coating agent. Selecting a PET release film with the smooth surface facing upwards and fixing the PET release film on a table top, using a 30-mesh scraper bar to carry out blade coating at a constant speed, immediately attaching the release film and white polyester grey cloth after blade coating, controlling the curing time to be 10s and the curing temperature to be 110-130 ℃, naturally drying, and then stripping the release film to obtain the waterborne polyurethane imitation leather coating fabric.
The used auxiliary agents comprise 1 part of thickening agent, 2 parts of wetting agent, 0.2 part of flatting agent and 0.2 part of defoaming agent; the thickener used is a polyurethane associative rheology agent 212; the wetting agent is polyether modified organosilicon; the used antifoaming agent is antifoaming agent 204; the leveling agent is polyether modified polydimethylsiloxane.
(4) Preparing a water-based polyurethane imitation Pi Tuceng local gold stamping fabric: and (3) placing the waterborne polyurethane leather-like fabric into a stamping machine at about 135 ℃, and carrying out gold stamping at the speed of about 12 m/min.
Example 2
The only difference from example 1 is the use of UV absorber uv-b.
Example 3
The only difference from example 1 is the use of UV absorber uv-c.
Example 4
The only difference from example 1 is the use of UV absorber uv-d.
Comparative example
Only different from example 1 in that no ultraviolet absorber was used.
The following characterization was carried out for examples 1 to 4 and the comparative example
1. Characterization of examples 1-4 and the control, the effect of different UV absorber types on the difference in color and the fastness to light before and after irradiation of the printed fabrics:
the irradiation conditions were: exposing ultraviolet light with irradiance of 0.89W/m2 at 340nm for 48h under sun-shading fabric and other pieces with the blackboard temperature of 60 ℃;
reference standard: the color fastness to light is tested according to GB/T31899-2015 test condition 1 of ultraviolet light solarization in the textile weather resistance test, and the color change of the sample after solarization is evaluated by a gray sample card which accords with GB/T250-84.
The results are shown in table 1:
TABLE 1 influence of the type of UV absorber on the color difference and light fastness before and after irradiation of printed textiles
2. Representing the influence of an ultraviolet absorbent UV-a on the color fastness to light of the waterborne polyurethane imitation leather fabric:
the irradiation conditions were: exposing ultraviolet light with irradiance of 0.89W/m2 at 340nm for 48h under sun-shading fabric and other pieces with the blackboard temperature of 60 ℃;
reference standard: the color fastness to light is tested according to GB/T31899-2015 test condition 1 of ultraviolet light solarization in the textile weather resistance test, and the color change of the sample after solarization is evaluated by a gray sample card which accords with GB/T250-84.
The results are shown in fig. 1, fig. 2, and table 2.
TABLE 2 color fastness to light and chroma values of waterborne polyurethane imitation leather coating fabric before and after illumination
Example 6
The transfer printing of the embodiments 1 to 4 and the comparative example was completed in a hot press, which included a base 1, and a bottom plate mechanism and a pressing plate mechanism installed on the base 1; the bottom plate mechanism comprises a bottom plate 3 and positioning components 2 arranged on two sides of the bottom plate 3, and the transfer printing paper is flatly paved on the bottom plate 3 by the positioning components 2;
the positioning component 2 comprises a guide rod 21, a positioning claw 22 and a handle rod 23, the positioning claw 22 is arranged on the guide rod 21, and the positioning claw 22 is controlled to press or loosen the transfer printing paper by rotating the guide rod 21; the handle rod 23 is connected with the guide rod 21 and is used for manually controlling the guide rod 21 to rotate; a torsion spring (not shown) is installed in the guide rod 21, and gives a resilience force to the guide rod 21, and the resilience force forces the guide rod 21 to rotate to a position where the positioning claw is pressed against the transfer paper; the guide rod 21 is further connected with a fastener 24, the fastener 24 is provided with a fastener 241, the side surfaces of the two sides of the bottom plate 3 are provided with clamping grooves (not shown in the figure), and the fastener 241 is matched with the clamping grooves. The positioning assembly 2 consists of a guide rod 21, positioning claws 22 and a handle rod 23, wherein the front end and the rear end of the guide rod 21 are respectively hinged to a front end plate 31 and a rear end plate 32 on two sides of the bottom plate 3, the positioning claws 22 are in an arch shape, 4 positioning claws 22 are regularly arranged on the guide rod 21, and when the guide rod 21 rotates towards the bottom plate 3, the positioning claws 22 clamp the transfer printing paper, otherwise, the transfer printing paper is loosened. The handle rod 23 penetrates through the front end plate 31 and is connected with the guide rod 21 for manually controlling the guide rod 21 to rotate directionally. The positioning assembly 2 is simple in structure, can realize positioning, fixing and loosening of the transfer paper in a rotating mode, and is convenient to operate; 4 positioning claws 22 are matched, the positioning and fixing effect is good, and the transfer printing paper is stably attached to the bottom plate 3; the handle rod 23 is convenient for an experimenter to control the guide rod 21, a torsion spring is arranged in the guide rod 21 and gives resilience force to the guide rod 21 to rotate towards the bottom plate 3, so that the positioning claw 22 has certain clamping force and positioning and fixing effects are improved; due to the existence of the torsion spring, when the guide rod 21 rotates reversely and is loosened, the guide rod 21 also has resilience, so the clamping piece 24 is arranged to realize temporary fixation of the guide rod 21, and the design is ingenious.
The pressing plate mechanism comprises a pressing plate 6, an operation and control assembly 5, a clamping assembly 7 and a heating assembly 4, the pressing plate 6 is matched with the bottom plate 3, the clamping assembly 7 comprises a clamping cylinder 72 and a clamping plate 71, the clamping cylinder 72 is installed at the upper end of the pressing plate 6, a connecting rod of the clamping cylinder 72 penetrates through the clamping plate 71 connected with the lower end of the pressing plate 6, and the clamping cylinders 72 arranged in the front and at the back are respectively connected with the front end and the back end of the clamping plate 71; clamping grooves 61 are formed in two sides of the pressing plate 6, and the clamping plates 71 are matched with the clamping grooves 61 to clamp the white polyester grey cloth to enable the white polyester grey cloth to be flatly laid on the pressing plate 6; the clamping assembly 7 consists of two groups of clamping cylinders 72 and two groups of clamping plates 71, the clamping cylinders 72 are divided into two groups and are respectively arranged on two sides of the pressing plate 6, each group of clamping cylinders 72 comprises two clamping cylinders arranged in front and back, the clamping cylinders 72 arranged in front and back are used for jointly controlling the movement of the clamping plates 71, when the clamping cylinders 72 extend out, the clamping plates 71 move downwards, through holes are formed between the clamping plates 71 and the clamping grooves 61, two ends of the grey cloth are arranged at the through holes, and after the clamping cylinders 72 retract, the clamping plates 71 are matched with the clamping grooves 61 to clamp the grey cloth; this clamping assembly 7 is fixed through die clamping cylinder 72, and during the tiling, the laboratory technician hold grey cloth both ends can, convenient operation.
The pressing plate 6 is connected with an operation and control assembly 5, the operation and control assembly 5 comprises a support 51, an upper pressure rod 52, a lower pressure rod 53 and an operation and control handle 54, the support 51 is arranged on the base 1, the upper pressure rod 52 and the lower pressure rod 53 are hinged to the support 51, and the front ends of the upper pressure rod 52 and the lower pressure rod 53 are connected with each other and move synchronously; the control handle 54 is connected with the upper pressure rod 52, and the upper pressure rod 52 and the lower pressure rod 53 are controlled to be pressed downwards by the control handle based on the connection relation; the lower pressing rod 53 is connected with the pressing plate 6 through the screw pressing piece 55, the screw pressing piece 55 comprises a knob cover 551, the knob cover 551 controls the lower pressing rod 53 to press the pressing plate 6 downwards, the knob cover 551 is screwed, and the screw pressing piece 55 is pressed against the pressing plate 6 downwards, so that the pressing plate 6 and the bottom plate 3 are pressed tightly.
The pressing plate 6 is also provided with three turnover covers 8, the three turnover covers 8 are respectively arranged at the front position, the left position and the right position of the pressing plate 6, the turnover covers 8 are connected to the pressing plate 6 in a turnover way, and the side seams between the pressing plate 6 and the bottom plate 3 are enclosed by the turnover covers 8; the flip cover 8 comprises a first cover plate 81 and a second cover plate 82, the first cover plate 81 and the second cover plate 82 are connected in a mutually perpendicular mode, a flip shaft 83 is connected between the first cover plate 81 and the pressing plate 6, and the flip cover 8 is flipped through the flip shaft 83. The longitudinal section of the flip cover 8 is L-shaped and is formed by connecting a first cover plate 81 and a second cover plate 82 which are perpendicular to each other, after the cover plate is turned downwards, the first cover plate 81 and the second cover plate 82 enclose a side seam between the pressing plate 6 and the bottom plate 3, and the situation that an experimenter touches the side seam carelessly to scald the side seam is prevented.
The heating assembly 4 heats the platen 6, and a conventional heater is used to heat the platen 6.
The hot press is a small-sized hot press, is suitable for the research operation of laboratories such as colleges and universities, research institutes and the like, and has the working process that:
a. spreading the transfer paper on a bottom plate 3 and fixing the transfer paper by a positioning component 2;
b. laying white polyester grey cloth on a pressing plate 6, and fixing by virtue of a clamping assembly 7;
c. the experimenter holds the control handle 54 and presses down until the pressure plate 6 is tightly attached to the bottom plate 3, and then screws the knob cover 551 tightly to further press the pressure plate 6 against the bottom plate 3;
d. starting the heating component 4, starting heating, and carrying out hot-press transfer printing for 10-30s at 200-230 ℃ to finish the transfer printing;
e. and (3) closing the heating assembly 4, cooling for a period of time, loosening the positioning assembly 2, opening the pressing plate 6 and the bottom plate 3, and loosening the clamping assembly 7 to obtain the transfer printing fabric.
This locating component 2 presss from both sides tightly respectively with clamping component 7 and fixes transfer printing paper and white dacron grey cloth for both stabilize tiling and align each other, compress tightly both and can realize the transfer printing, need not artificial laminating printing paper and white dacron grey cloth, labour saving and time saving, and both laminating is neat, can not appear skew, crisscross scheduling problem, and is beneficial to the transfer printing. The hot press adopts a manual pressing mode, is controlled by the control assembly 5, does not need to be provided with a movable electric structure, is convenient to manufacture, reduces the cost, and the screw pressing piece 55 is used for further pressing the pressing plate 6 and the bottom plate 3, so that the mutual pressure between the pressing plate 6 and the bottom plate is increased, and the transfer printing effect is improved.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to solve the same technical problems and achieve the same technical effects are all covered in the protection scope of the present invention.
Claims (10)
1. A preparation process of a high-color-fastness imitation leather local gold stamping fabric is characterized by comprising the following steps:
(1) Preparing a disperse dye transfer printing fabric: mixing 6% of ultraviolet absorbent and 4% of dye at room temperature, adding 3% of dispersant NNO, 87% of PVB solution and zirconia beads with the proportion of the ultraviolet absorbent being 1; stirring and dispersing for 15-20h at room temperature under the condition of 1000r/min, and standing for later use after stirring; coating the printing paste on transfer paper at room temperature, immediately drying at 30 ℃, attaching the dried transfer paper and white polyester grey cloth, and performing hot-press transfer printing for 10-30s at 200-230 ℃ to obtain a transfer printing fabric;
(2) Preparing a water-based polyurethane imitation leather coating fabric: sequentially adding water polyurethane, pigment and an auxiliary agent into a beaker, and fully stirring to prepare the water polyurethane imitation leather coloring coating agent; taking a release film, coating a coating agent on the release film, attaching the release film to a transfer printing fabric after coating, controlling the curing time to be 10s and the curing temperature to be 110-130 ℃, naturally drying in the air, and then stripping the release film to obtain the waterborne polyurethane imitation leather coating fabric;
(3) Preparing a water-based polyurethane imitation Pi Tuceng local gold stamping fabric: and (3) placing the waterborne polyurethane imitation leather coating fabric into a gilding press at about 135 ℃, and gilding at the speed of about 12 m/min.
2. The preparation process of the high-color-fastness imitation leather local gold stamping fabric, according to claim 1, is characterized in that: the white terylene grey cloth needs to be pretreated and pre-shaped.
3. The preparation process of the high-color-fastness imitation leather local gold stamping fabric, according to claim 1, is characterized in that: the step (1): the PVB solution used is prepared by dissolving polyvinyl butyral in isobutanol or methanol.
4. The preparation process of the high-color-fastness imitation leather local gold stamping fabric, according to claim 1, is characterized in that: the step (1): the structure of the ultraviolet absorbent is benzotriazole ultraviolet absorbent.
5. The preparation process of the high-color-fastness imitation leather local gold stamping fabric according to claim 1, characterized by comprising the following steps: the step (1): the transfer printing is sublimation transfer printing.
6. The preparation process of the high-color-fastness imitation leather local gold stamping fabric, according to claim 1, is characterized in that: the step (2): the used auxiliary agents comprise 1 part of thickening agent, 2 parts of wetting agent, 0.2 part of flatting agent and 0.2 part of defoaming agent; the used thickener is one of polyurethane associative rheological agent 212, associative polyurethane thickener 105A or polyurethane thickener 621N; the wetting agent is one of polyether modified organic silicon, modified polysiloxane or organic siloxane copolymer; the used defoaming agent is one of defoaming agent 204, organic silicon defoaming agent PLX-4060 or polyurethane defoaming agent DE-0389; the leveling agent is one of polyether modified polydimethylsiloxane, polyether modified siloxane or polyether polyurethane.
7. The preparation process of the high-color-fastness imitation leather local gold stamping fabric, according to claim 1, is characterized in that: the step (2): the release film is PET release film.
8. The preparation process of the high-color-fastness imitation leather local gold stamping fabric according to claim 1, characterized by comprising the following steps: the step (1): the hot-pressing transfer printing is completed in a hot press, and the hot press comprises a base, and a bottom plate mechanism and a pressing plate mechanism which are arranged on the base; the bottom plate mechanism comprises a bottom plate and positioning components arranged on two sides of the bottom plate, and the positioning components are used for flatly paving the transfer printing paper on the bottom plate; the pressing plate mechanism comprises a pressing plate, an operation and control assembly, a clamping assembly and a heating assembly, the pressing plate is matched with the bottom plate, the pressing plate is connected with the operation and control assembly, the operation and control assembly comprises a support, an upper pressing rod, a lower pressing rod and an operation and control handle, the upper pressing rod and the lower pressing rod are hinged to the support, and the upper pressing rod and the lower pressing rod are connected with each other and move synchronously; the control handle is connected with the upper pressure rod, the lower pressure rod is connected with the pressure plate through a screw pressing piece, the screw pressing piece comprises a knob cover, and the knob cover controls the lower pressure rod to press the pressure plate; the clamping components are arranged on two sides of the pressing plate, and the white polyester grey cloth is flatly paved on the pressing plate; the heating component heats the pressing plate.
9. The preparation process of the high-color-fastness imitation leather local gold stamping fabric according to claim 8, characterized in that: the positioning assembly comprises a guide rod, a positioning claw and a handle rod, the positioning claw is arranged on the guide rod, and the positioning claw is controlled to press or loosen the transfer printing paper by rotating the guide rod; the handle rod is connected with the guide rod and is used for manually controlling the guide rod to rotate; a torsion spring is arranged in the guide rod and gives resilience force to the guide rod, and the resilience force forces the guide rod to rotate to a position where the positioning claw presses the transfer printing paper; the guide rod is further connected with a clamping piece, the clamping piece is provided with a clamping buckle, the side faces of the two sides of the bottom plate are provided with clamping grooves, and the clamping buckle is matched with the clamping grooves.
10. The preparation process of the high-color-fastness imitation leather local gold stamping fabric according to claim 8, characterized in that: the clamping assembly comprises a clamping cylinder and a clamping plate, the clamping cylinder is arranged at the upper end of the pressing plate, a connecting rod of the clamping cylinder penetrates through the clamping plate connected with the lower end of the pressing plate, and the clamping cylinders arranged in the front and at the back are respectively connected with the front end and the back end of the clamping plate; clamping grooves are formed in the two sides of the pressing plate, and the clamping plate is matched with the clamping grooves to clamp the white polyester grey cloth to enable the white polyester grey cloth to be flatly laid on the pressing plate; the pressure plate is also provided with a turnover cover, the turnover cover is connected to the pressure plate in a turnover way, and the side seam between the pressure plate and the bottom plate is enclosed by the turnover cover; the turnover cover comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are connected in a mutually perpendicular mode, a turnover shaft is connected between the first cover plate and the pressing plate, and the turnover cover is turned over through the turnover shaft.
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| CN202211311207.1A CN115679712A (en) | 2022-10-25 | 2022-10-25 | Preparation process of high-color-fastness imitation leather local gold stamping fabric |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211311207.1A CN115679712A (en) | 2022-10-25 | 2022-10-25 | Preparation process of high-color-fastness imitation leather local gold stamping fabric |
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