阅读说明：本技术 一种环保型pvc透明台布 (Environment-friendly PVC transparent tablecloth ) 是由 区健辉 于 2020-05-25 设计创作，主要内容包括：本发明提供了一种环保型PVC透明台布,包括基布层、中间PVC薄膜层、表面PVC薄膜层和油墨层；按照重量份数,所述油墨层原料为：50-60份的环氧树脂、8-10份的色浆、15-20份的丙烯酸、20-30份的水性聚氨酯、1-5份的乙二醇丁醚、0.5-1份的速干剂、0.5-1份的防腐剂、0.5-1份的消泡剂、0.5-1份的分散剂、0.5-1份的增滑剂、0.5-1份的增稠剂、0.5-1份的赋形剂和10-15份的去离子水。本发明提供的一种环保型PVC透明台布的墨水以去离子水为溶剂,加入环氧树脂、色浆、丙烯酸、水性聚氨酯和乙二醇丁醚为主要原料,辅以速干剂、防腐剂、消泡剂、分散剂、增滑剂、增稠剂和赋形剂多种助剂,使得该水性油墨自交联温度低,同时对环境友好,且油墨粘附力强。(The invention provides environment-friendly PVC (polyvinyl chloride) transparent tablecloth which comprises a base cloth layer, a middle PVC film layer, a surface PVC film layer and an ink layer, wherein the base cloth layer is made of PVC; the ink layer comprises the following raw materials in parts by weight: 50-60 parts of epoxy resin, 8-10 parts of color paste, 15-20 parts of acrylic acid, 20-30 parts of waterborne polyurethane, 1-5 parts of ethylene glycol monobutyl ether, 0.5-1 part of quick-drying agent, 0.5-1 part of preservative, 0.5-1 part of defoaming agent, 0.5-1 part of dispersing agent, 0.5-1 part of slipping agent, 0.5-1 part of thickening agent, 0.5-1 part of excipient and 10-15 parts of deionized water. The environment-friendly PVC transparent tablecloth ink provided by the invention takes deionized water as a solvent, epoxy resin, color paste, acrylic acid, waterborne polyurethane and ethylene glycol monobutyl ether are added as main raw materials, and a plurality of auxiliaries such as a quick-drying agent, a preservative, a defoaming agent, a dispersing agent, a slipping agent, a thickening agent and an excipient are added as auxiliary materials, so that the water-based ink is low in self-crosslinking temperature, environment-friendly and strong in ink adhesion.)

1. An environment-friendly PVC transparent tablecloth is characterized by comprising a base cloth layer, a middle PVC film layer, a surface PVC film layer and an ink layer; the middle PVC film layer comprises the following raw materials in parts by weight: 100 parts of PVC resin, 30-40 parts of plasticizer, 5-10 parts of heat stabilizer, 4-8 parts of antioxidant and 6-12 parts of intermediate functional additive; the surface PVC film layer comprises the following raw materials: 100 parts of PVC resin, 50-60 parts of plasticizer, 4-6 parts of heat stabilizer, 4-8 parts of antioxidant and 6-12 parts of surface functional additive; the ink layer comprises the following raw materials: 50-60 parts of epoxy resin, 8-10 parts of color paste, 15-20 parts of acrylic acid, 20-30 parts of waterborne polyurethane, 1-5 parts of ethylene glycol monobutyl ether, 0.5-1 part of quick-drying agent, 0.5-1 part of preservative, 0.5-1 part of defoaming agent, 0.5-1 part of dispersing agent, 0.5-1 part of slipping agent, 0.5-1 part of thickening agent, 0.5-1 part of excipient and 10-15 parts of deionized water.

2. The environmentally friendly PVC transparent tablecloth according to claim 1, wherein the quick drying agent is any one of cerium naphthenate, lanthanum naphthenate and cerium carboxylate, the defoamer is basf (cotinine) deionized water paint defoamer dehydrian 1293, the dispersant is any one of sodium polyacrylate, polyvinyl alcohol and polyacrylamide, the slip agent is pasty ultra-high molecular weight polydimethylsiloxane dispersion, the thickener is a cross-linked polymer emulsion thickener containing acidic groups, and the excipient is any one or a mixture of calcium carbonate, talc, clay, montmorillonite and silica.

3. The environment-friendly PVC transparent tablecloth of claim 2, wherein the base cloth layer, the intermediate PVC film layer, and the surface PVC film layer are laminated and rolled to form a shape, and then the raw material of the ink layer is printed as ink on the surface PVC film layer by a PVC film printer to form an ink layer, which is then cooled, drawn, trimmed, and cut to form the PVC transparent tablecloth.

4. The environmentally friendly PVC transparent tablecloth of claim 3, wherein the PVC film printing machine comprises a cabinet, a printing roller, a backing roller, an ink application roller and an ink jet mechanism,

the machine case comprises a bearing arm which is rotationally connected with the machine case, and the printing roller, the pressure bearing roller, the ink applying roller and the ink jet mechanism are arranged in the machine case;

the printing roller is connected with the ink feeding roller, a pressure bearing roller is arranged above the printing roller, and a channel for a PVC film to pass through is reserved between the printing roller and the pressure bearing roller;

the ink jet mechanism includes ink tank, inkjet switch and spray arm, the ink tank connect in the inkjet switch, the inkjet switch is connected the spray arm when the bearing arm is in the open mode, the bearing arm triggers the inkjet switch is in the connected state, ink in the ink tank warp the inkjet switch gets into the spray arm is in order to spray extremely go up the ink roller, it conducts the ink to the printing roller with printing PVC film to go up the ink roller.

5. The environment-friendly PVC transparent tablecloth of claim 4, wherein the ink jet switch comprises a housing, a movable piston, and a first spring, wherein a piston cavity is arranged in the housing, one end of the piston cavity is provided with a first opening, and the other end of the piston cavity is provided with a second opening; the movable piston is movably arranged in the piston cavity, a connecting channel is arranged in the movable piston, one end of the connecting channel is communicated with the first opening, two sealing rings are sleeved on the outer wall of the movable piston, and the movable piston is used for sealing the second opening when moving to the second opening and being positioned between the sealing rings; the first spring is arranged between the inner wall of the shell and the movable piston, and when the movable piston moves to the connecting channel to be communicated with the second opening, the first spring is in a compressed state.

6. The environment-friendly PVC transparency as claimed in claim 5, wherein the ink tank comprises a tank body, a moving plate movably disposed in the tank body, and a second spring connected between a side surface of the moving plate and an inner wall of the tank body for pushing the moving plate to discharge ink.

7. The environment-friendly PVC transparent tablecloth of claim 6, wherein a frame is disposed above the pressure-bearing roller, both ends of the pressure-bearing roller are rotatably connected to the frame, and an air cylinder is connected to the upper end of the frame and fixedly connected to the frame.

8. The environment-friendly PVC transparent tablecloth of claim 7, further comprising a material feeding roll and a material receiving roll, wherein the printing roll and the pressure bearing roll are arranged between the material feeding roll and the material receiving roll, a blower is arranged between the material receiving roll and the printing roll, and exhaust fans are arranged on two sides of the blower.

9. The environmentally friendly PVC transparent sheet according to claim 8, wherein the ink jet mechanism further comprises a recovery unit, the recovery unit being disposed below the inking roller and connected to the ink tank.

10. The environmentally friendly PVC transparent tablecloth of claim 9, wherein the inkjet switch is disposed on a sidewall of the cabinet and extends from the cabinet, and when the supporting arm rotates to a state of lifting the PVC film, the pressure-bearing arm presses the moving piston of the inkjet switch, so that the moving piston moves to the connection passage to communicate with the second opening; when the supporting arm is retracted, the pressure bearing arm releases the contact pressure of the movable piston.

Technical Field

The invention relates to the technical field of PVC, in particular to environment-friendly PVC transparent tablecloth.

Background

PVC, the full name is Polyvinylchlorid, the main component is polyvinyl chloride, in addition, other components are added to enhance the heat resistance, toughness, ductility and the like of the PVC, the PVC is a synthetic material which is popular and widely applied in the world at present, and the global usage amount of the PVC film is the second highest among various synthetic materials and is applied to every aspect of daily life.

The PVC film printing machine is a printing device for printing single-color or multi-color patterns on various types of PVC films, and the printing process is a process that a coiled printing film is unfolded by an unreeling machine, is conveyed to an imprinting device to be embossed and dyed with patterns or colors, is quickly dried by a drying device or an air drying device, and is finally coiled by a coiling machine.

There are many factors that affect the printing quality in the printing process, and the ink is one of them, and the ink expresses patterns and characters on the PVC transparent tablecloth by printing. The ink comprises a main component and an auxiliary component, which are uniformly mixed and repeatedly rolled to form a viscous colloidal fluid. The water-based ink is called as water ink for short, and is mainly prepared by carrying out compound grinding on water-soluble resin, organic pigment, solvent and related auxiliary agents. The water-based ink is particularly suitable for packaging and printing products with strict requirements on sanitary conditions, such as cigarettes, wine, foods, beverages, medicines, toys for children and the like. The existing water-based ink has the problems of high crosslinking temperature, few varieties, poor stability and poor fastness, so that the design of the low-temperature self-crosslinking environment-friendly high-performance PVC water-based ink is necessary.

Disclosure of Invention

The invention aims to provide the environment-friendly PVC transparent tablecloth, which avoids the influence of color lump formation on the printing effect and has strong ink adhesion.

Therefore, the invention provides environment-friendly PVC transparent tablecloth which comprises a base cloth layer, a middle PVC film layer, a surface PVC film layer and an ink layer; the middle PVC film layer comprises the following raw materials in parts by weight: 100 parts of PVC resin, 30-40 parts of plasticizer, 5-10 parts of heat stabilizer, 4-8 parts of antioxidant and 6-12 parts of intermediate functional additive; the surface PVC film layer comprises the following raw materials: 100 parts of PVC resin, 50-60 parts of plasticizer, 4-6 parts of heat stabilizer, 4-8 parts of antioxidant and 6-12 parts of surface functional additive; the ink layer comprises the following raw materials: 50-60 parts of epoxy resin, 8-10 parts of color paste, 15-20 parts of acrylic acid, 20-30 parts of waterborne polyurethane, 1-5 parts of ethylene glycol monobutyl ether, 0.5-1 part of quick-drying agent, 0.5-1 part of preservative, 0.5-1 part of defoaming agent, 0.5-1 part of dispersing agent, 0.5-1 part of slipping agent, 0.5-1 part of thickening agent, 0.5-1 part of excipient and 10-15 parts of deionized water.

Preferably, the quick drying agent is any one of cerium naphthenate, lanthanum naphthenate and cerium carboxylate, the defoaming agent is Dehydran1293 of a deionized water coating defoaming agent of basf (cotinine), the dispersing agent is any one of sodium polyacrylate, polyvinyl alcohol and polyacrylamide, the slip agent is pasty ultrahigh molecular weight polydimethylsiloxane dispersion liquid, the thickening agent is a cross-linking type high molecular emulsion thickening agent containing an acidic group, and the excipient is any one or a mixture of more of calcium carbonate, talcum powder, clay, montmorillonite and silicon dioxide.

Preferably, the base fabric layer, the middle PVC film layer and the surface PVC film layer are laminated and laminated to be molded, then the raw material of the ink layer is printed on the surface PVC film layer as ink through a PVC film printer to form the ink layer, and the ink layer is formed through cooling, traction, trimming and cutting.

Preferably, the PVC film printer comprises a machine box, a printing roller, a backing roller, an ink roller and an ink jet mechanism,

the machine case comprises a bearing arm which is rotationally connected with the machine case, and the printing roller, the pressure bearing roller, the ink applying roller and the ink jet mechanism are arranged in the machine case;

the printing roller is connected with the ink feeding roller, a pressure bearing roller is arranged above the printing roller, and a channel for a PVC film to pass through is reserved between the printing roller and the pressure bearing roller;

the ink jet mechanism includes ink tank, inkjet switch and spray arm, the ink tank connect in the inkjet switch, the inkjet switch is connected the spray arm when the bearing arm is in the open mode, the bearing arm triggers the inkjet switch is in the connected state, ink in the ink tank warp the inkjet switch gets into the spray arm is in order to spray extremely go up the ink roller, it conducts the ink to the printing roller with printing PVC film to go up the ink roller.

Preferably, the inkjet switch comprises a housing, a movable piston and a first spring, wherein a piston cavity is arranged in the housing, one end of the piston cavity is provided with a first opening, and the other end of the piston cavity is provided with a second opening; the movable piston is movably arranged in the piston cavity, a connecting channel is arranged in the movable piston, one end of the connecting channel is communicated with the first opening, two sealing rings are sleeved on the outer wall of the movable piston, and the movable piston is used for sealing the second opening when moving to the second opening and being positioned between the sealing rings; the first spring is arranged between the inner wall of the shell and the movable piston, and when the movable piston moves to the connecting channel to be communicated with the second opening, the first spring is in a compressed state.

Preferably, the ink tank includes a tank body, a moving plate movably disposed in the tank body, and a second spring connected between a side surface of the moving plate and an inner wall of the tank body for urging the moving plate to discharge ink.

Preferably, the top of backing roll is provided with the frame, the both ends of backing roll rotate to be connected in on the frame, the upper end of frame is connected with the cylinder, the cylinder rigid coupling is in on the frame.

Preferably, still including the material of blowing up and receive the material and roll up, printing roller, backing roll locate between the material of blowing up and receiving the material roll, receive the material roll with be provided with the hair-dryer between the printing roller, the both sides of hair-dryer all are provided with the air exhauster.

Preferably, the ink jet mechanism further includes a recovery device, and the recovery device is disposed below the ink application roller and connected to the ink tank.

Preferably, the inkjet switch is arranged on a side wall of the case and extends out of the case, and when the bearing arm rotates to a state of lifting the PVC film, the bearing arm touches and presses a moving piston of the inkjet switch, so that the moving piston moves to a connecting channel to be communicated with the second opening; when the supporting arm is retracted, the pressure bearing arm releases the contact pressure of the movable piston.

Compared with the prior art, the ink of the environment-friendly PVC transparent tablecloth provided by the invention takes deionized water as a solvent, epoxy resin, color paste, acrylic acid, waterborne polyurethane and ethylene glycol monobutyl ether as main raw materials, and is supplemented with a quick-drying agent, a preservative, a defoaming agent, a dispersing agent, a slipping agent, a thickening agent and a plurality of auxiliary agents of an excipient, so that the water-based ink is low in self-crosslinking temperature, environment-friendly, high in stability, free of condensate, capable of preventing color lump agglomeration from influencing the printing effect, and strong in ink adhesion.

Further, when the PVC film printing machine stops working, the ink jet switch is in a closed state, ink in the ink box is in a sealed state, and deterioration is avoided without contacting with air. When using, rotate the bearing arm in order to lift the PVC film, the bearing arm triggers inkjet switch this moment, makes inkjet switch is in the connected state, the ink warp in the ink tank the inkjet switch gets into the spray arm is in order to spray to go up the ink roller, it conducts the ink to printing roller in order to print the PVC film with the printing to go up the ink roller.

Drawings

FIG. 1 is a schematic diagram of the structure of a PVC film printing machine;

FIG. 2 is a schematic view of the ink jet switch in an open state;

FIG. 3 is a schematic view of the ink jet switch in the closed state;

fig. 4 is a schematic structural view of the ink tank.

In the figure:

10-a chassis; 11-a support arm; 20-a backing roll; 21-cylinder; 30-a printing roller; 40-ink roller; 50-material roll placing; 60-material collecting roll; 70-an ink jet mechanism; 71-ink tank; 711-a box body; 712-a moving plate; 713-a second spring; 72-ink jet switch; 721-a housing; 7211-a first opening; 7212-a second opening; 7213-a piston cavity; 722-a moving piston; 7221-sealing ring; 7222-connecting the channels; 723-a first spring; 73-recoverer; 74-spray arm; 80-PVC film.

Detailed Description

The invention will be further explained with reference to the drawings.

An environment-friendly PVC transparent tablecloth comprises a base cloth layer, a middle PVC thin film layer, a surface PVC thin film layer and an ink layer; the middle PVC film layer comprises the following raw materials in parts by weight: 100 parts of PVC resin, 30-40 parts of plasticizer, 5-10 parts of heat stabilizer, 4-8 parts of antioxidant and 6-12 parts of intermediate functional additive; the surface PVC film layer comprises the following raw materials: 100 parts of PVC resin, 50-60 parts of plasticizer, 4-6 parts of heat stabilizer, 4-8 parts of antioxidant and 6-12 parts of surface functional additive; the ink layer comprises the following raw materials: 50-60 parts of epoxy resin, 8-10 parts of color paste, 15-20 parts of acrylic acid, 20-30 parts of waterborne polyurethane, 1-5 parts of ethylene glycol monobutyl ether, 0.5-1 part of quick-drying agent, 0.5-1 part of preservative, 0.5-1 part of defoaming agent, 0.5-1 part of dispersing agent, 0.5-1 part of slipping agent, 0.5-1 part of thickening agent, 0.5-1 part of excipient and 10-15 parts of deionized water.

The quick-drying agent is any one of cerium naphthenate, lanthanum naphthenate and cerium carboxylate, the defoaming agent is a Dehydran1293 of a deionized water coating defoaming agent of basf (cotinine), the dispersing agent is any one of sodium polyacrylate, polyvinyl alcohol and polyacrylamide, the slipping agent is pasty ultrahigh molecular weight polydimethylsiloxane dispersion liquid, the thickening agent is a cross-linking type high molecular emulsion thickening agent containing an acidic group, and the excipient is any one or a mixture of more of calcium carbonate, talcum powder, clay, montmorillonite and silicon dioxide. In the production process, the base cloth layer, the middle PVC film layer and the surface PVC film layer are laminated and rolled to form, then the raw material of the ink layer is printed on the surface PVC film layer as ink through a PVC film printer to form the ink layer, and the ink layer is formed through cooling, traction, trimming and cutting.

FIG. 1 is a schematic diagram of the structure of a PVC film printing machine. As shown in fig. 1, the PVC film printing machine includes a cabinet 10, a printing roller 30, a backing roller 20, an ink application roller 40, and an ink jet mechanism 70.

The machine case 10 comprises a bearing arm 11, the bearing arm 11 is rotationally connected to the machine case 10, and the printing roller 30, the pressure roller 20, the ink applying roller 40 and the ink jet mechanism 70 are arranged in the machine case 10. The inkjet switch 72 is disposed on a side wall of the housing 10 and extends out of the housing 10, and when the supporting arm 11 rotates to a state of lifting the PVC film 80, the pressure-bearing arm touches the movable piston 722 of the inkjet switch 72, so that the movable piston 722 moves to the connection passage 7222 and communicates with the second opening 7212; when the support arm 11 is retracted, the pressure arm releases the contact pressure on the movable piston 722.

The printing roller 30 with the inking roller 40 meets, the top of printing roller 30 is provided with backing roller 20, it has the passageway that supplies PVC film 80 to pass through to reserve between printing roller 30 and the backing roller 20. A frame is arranged above the pressure bearing roller 20, and two ends of the pressure bearing roller 20 are rotatably connected to the frame. The upper end of the frame is connected with a cylinder 21, and the cylinder 21 is fixedly connected to the frame. The cylinder 21 is welded on the frame, and the extension and contraction of the piston rod of the cylinder 21 can drive the frame to ascend and descend, i.e. can drive the pressure-bearing roller 20 to ascend and descend, so that the distance between the pressure-bearing roller 20 and the printing roller 30 can be adjusted, the PVC film 80 with different thickness and size can be used, the pressure of the pressure-bearing roller 20 and the printing roller 30 on the PVC film 80 can be adjusted, and the compactness of ink on the surface of the PVC film 80 can be adjusted.

Fig. 2 is a schematic structural view of the ink jet switch 72 in an open state, and fig. 3 is a schematic structural view of the ink jet switch 72 in a closed state. As shown in fig. 2 and 3, the ink jet mechanism 70 includes an ink tank 71, an ink jet switch 72 and a spray arm 74, the ink tank 71 is connected to the ink jet switch 72, the ink jet switch 72 is connected to the spray arm 74, when the support arm 11 is in an open state, the support arm 11 triggers the ink jet switch 72 to be in a connected state, the ink in the ink tank 71 enters the spray arm 74 through the ink jet switch 72 to be sprayed to the ink roller 40, and the ink roller 40 conducts the ink to the printing roller 30 to print the PVC film 80.

The inkjet switch 72 includes a housing 721, a movable piston 722, and a first spring 723, wherein a piston chamber 7213 is provided in the housing 721, one end of which is provided with a first opening 7211, and the other end of which is provided with a second opening 7212. The movable piston 722 is movably arranged in the piston cavity 7213, a connecting channel 7222 is arranged in the piston cavity 7213, one end of the connecting channel 7222 is communicated with the first opening 7211, two sealing rings 7221 are sleeved on the outer wall of the movable piston 722, and when the movable piston 722 moves to the position where the second opening 7212 is positioned between the sealing rings 7221, the second opening 7212 is sealed; the first spring 723 is disposed between the inner wall of the housing 721 and the moving piston 722, and the first spring 723 is in a compressed state when the moving piston 722 moves to communicate the connection passage 7222 with the second opening 7212.

Fig. 4 is a schematic structural view of the ink tank. As shown in fig. 4, the ink tank 71 includes a case 711, a moving plate 712 movably disposed in the case 711, and a second spring 713 connecting between a side surface of the moving plate 712 and an inner wall of the case 711 for urging the moving plate 712 to discharge ink. The ink jet mechanism 70 further includes a recovery device, and the recovery period 73 is provided below the ink application roller 40 and connected to the ink tank 71 for recovering ink.

In use, the moving plate 712 is forced to apply pressure to the ink by the second spring 713, the pressure arm releases the pressure on the moving piston 722 due to the retracted state of the support arm 11, the first spring 723 pushes the moving piston 722 to the position shown in fig. 3, the first opening 7211 is located between the seals 7221, and the ink jet switch 72 is in the closed state.

When needing to print PVC film 80, open bearing arm 11, bearing arm touches and presses inkjet switch 72's removal piston 722 makes removal piston 722 move to connecting channel 7222 and second opening 7212 intercommunication, the ink in the ink tank 71 is through inkjet switch 72 gets into spray arm 74 is in order to spray to form roller 40, form roller 40 conducts the ink to printing roller 30 with printing PVC film 80.

The printing roller 30 is provided with a humidifier. When the environment is dry, the humidifier is properly started, the environment humidity can be adjusted, and the condensation speed of the ink can be favorably slowed down. The PVC film printing machine further comprises a material discharging roll 50 and a material receiving roll 60, wherein the printing roller 30 and the pressure bearing roller 20 are arranged between the material discharging roll 50 and the material receiving roll 60. A blower is arranged between the material collecting roll 60 and the printing roll 30, and an air outlet of the blower faces the PVC film 80 and is used for air-drying the ink on the surface of the PVC film 80. The air blowers are arranged on two sides of the blower, air flow blown out by the blower during air drying can be diffused to the two sides, the air blowers are arranged on the two sides of the blower, air with ink smell can be sucked away ingeniously, and air diffusion to the space is avoided.

It is to be understood that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover such changes and modifications as fall within the scope of the appended claims and equivalents thereof.