Sheet with ice flower crystallization effect, preparation process of sheet and packaging hose

Abstract

The invention discloses a sheet with an ice flower crystallization effect, a preparation method of the sheet and a packaging hose. According to the preparation process of the sheet with the ice flower crystallization effect, the printing base material layer is sequentially coated with the high-surface-energy coating, the pattern layer and the ice flower crystallization resin layer, and the sheet with the ice flower crystallization effect is prepared. The ice flower crystal resin layer is sequentially subjected to leveling drying through two sets of UV lamps with different powers, in the drying process of the low-power UV lamps, the surface layer of the resin forms a film and shrinks due to drying, but the inner layer is not dried and still is in a fluid state, and therefore natural irregular ice flower-like cracks can be formed on the surface of the resin. And after sufficient wrinkling and cracking for a period of time, complete curing and shaping are carried out through a high-power UV lamp, and the surface texture effect of the ice flower crystallization effect is formed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of printing technology, and particularly relates to a sheet material with ice flower crystallization effect and a preparation process and a packaging hose thereof. BACKGROUND

[0002] The preparation process of the packaging hose with ice flower crystallization effect in the prior art is either a reverse process of obtaining a granular point appearance through two layers of coating with different surface energies, or a "frosted glass" process of first making the coating surface frosted through specific wavelength light energy and then drying and fixing through secondary lamps. Both of the two processes have been widely applied in printing decoration process, and consumers have also experienced aesthetic fatigue. The reverse process can only produce a granular appearance effect, and it is difficult to balance the relationship between the particle size and the adhesion between the two layers of coating, so that the appearance of the reverse effect is difficult to be greatly improved, and the weak adhesion of the particles is difficult to meet the increasingly demanding e-commerce express delivery demand. The frosted glass process needs to install expensive specific wavelength lamp groups, and the coating resin needs to wait for the reaction of the frosted aggregation, which requires a large leveling space and a slow production speed, and is difficult to be commercialized on a large scale. Therefore, it is urgent to design a manufacturing process capable of producing ice flower crystallization effect on printed products. SUMMARY

[0003] In order to overcome the deficiencies and shortcomings of the prior art, the primary purpose of the present application is to provide a preparation method of ice flower crystallization resin. The preparation method produces a resin prepolymerization reaction by the mutual cooperation of different functional groups of the resin and the combination of a plurality of photoinitiators, and prepares the ice flower crystallization resin.

[0004] The second purpose of the present application is to provide the ice flower crystallization resin prepared by the above preparation method.

[0005] The third purpose of the present application is to provide a preparation process of a sheet material with ice flower crystallization effect. The preparation process coats the ice flower crystallization resin on the sheet material, realizes the curing degree of different depths in the coating layer at different energies through the combination of special coating leveling devices and different power UV lamp drying mechanisms, and then produces different stretching deformation appearance effects on the surface of the sheet material, thereby preparing the sheet material with ice flower crystallization effect.

[0006] The fourth purpose of the present application is to provide a sheet material with ice flower crystallization effect.

[0007] The fifth purpose of the present application is to provide a packaging hose with ice flower crystallization effect.

[0008] The primary purpose of the present application is achieved by the following technical scheme: A preparation method of ice flower crystallization resin, comprising the following steps, (1) epoxy acrylate resin, polyurethane acrylate resin, hexanediol diacrylate and benzophenone type photoinitiator are prepared according to the mass fraction of 15~25:35~45:30~35:4~5; (2) the epoxy acrylate resin and the polyurethane acrylate resin are mixed at high speed to prepare mixture I; (3) the hexanediol diacrylate is added to the mixture I and mixed at medium speed to prepare mixture II; (4) the benzophenone type photoinitiator is added to the mixture II and mixed at high frequency and low speed, and stored in the dark to prepare ice crystal resin; The epoxy acrylate resin in step (1) is E-51 epoxy acrylate resin containing 2 epoxy functional groups; the polyurethane acrylate resin is aliphatic polyurethane acrylate resin containing 6 acrylate functional groups; and the benzophenone type photoinitiator is composed of 2-hydroxybenzophenone and methoxybenzophenone according to the mass fraction of 1.5~2:2.5~3.

[0009] Preferably, the speed of high-speed stirring in step (2) is 8000~10000 rpm, and the temperature of high-speed stirring is 50~60℃.

[0010] Preferably, the speed of medium-speed stirring in step (3) is 5000~7000 rpm, and the temperature of medium-speed stirring is 40~50℃.

[0011] Preferably, the speed of high-frequency and low-speed stirring in step (4) is 1000~1200 rpm, the vibration frequency of high-frequency and low-speed stirring is 3000~5000 HZ, and the temperature of high-frequency and low-speed stirring is 35~40℃.

[0012] The second object of the application is achieved by the following technical scheme: An ice crystal resin prepared by the above preparation method.

[0013] The third object of the application is achieved by the following technical scheme: A preparation process of a sheet material with ice crystal effect, comprising the following steps, (a) under a UV lamp with a power of 8100w, a high surface energy coating is coated on a substrate layer by using a 300LCM~400LCM anilox roll at a coating speed of 60~70M / Min; (b) a pattern layer is printed on the high surface energy coating at a printing speed of 60~70M / Min; (c) using a 100 LCM~200 LCM anilox roll or a 100 mesh~300 mesh screen to coat the ice flower crystalline resin layer on the pattern layer at a coating speed of 60~70 M / Min, and sequentially passing through a 2000~4000 W UV lamp and a 7000~9000 W UV lamp to dry, to prepare a sheet material with ice flower crystalline effect.

[0014] Preferably, the substrate layer in step (1) is one of a tubular sleeve-shaped or sheet-shaped full-plastic composite sheet material, an aluminum-plastic composite sheet material, or an aluminized high-brightness sheet material.

[0015] Preferably, the high-surface-energy coating layer in step (1) is an acrylate polymer coating layer.

[0016] The fourth object of the present application is achieved by the following technical solution: A sheet material with ice flower crystalline effect is prepared by the above preparation process.

[0017] The fifth object of the present application is achieved by the following technical solution: A packaging hose with ice flower crystalline effect includes a pipe head and a pipe body, and the pipe body is prepared from the sheet material with ice flower crystalline effect.

[0018] Compared with the prior art, the present application has the following advantages and beneficial effects: (1) The ice flower crystalline resin preparation method of the present application selects a low-functionality epoxy acrylate resin and a high-functionality polyurethane acrylate resin to be mixed and stirred at high speed by a high-speed mixing and stirring instrument, and when the highest stirring speed is reached, the temperature of the stirring instrument is gradually increased to 50~60℃, so that the two kinds of resins are fully mixed. At 40~50℃, hexanediol diacrylate is added as a connecting material, so that the two resins of different densities can be linked into groups when they undergo polymerization reactions in the side chains. Different lengths of side chains will have different extension and shrinkage lengths when they are dried into films. This connecting material allows resins of different shrinkage ratios to be wound into films and integrated. Finally, by adding a variety of different benzophenone photoinitiators at 35~40℃, the resins undergo side chain polymerization reactions under different UV energies, thereby strengthening the film stretching and shrinking changes of different resins, obtaining more obvious appearance effects. Finally, high-frequency low-speed stirring is performed in a low-speed stirrer, and the product is stored in the dark, thereby preparing the required ice flower crystalline resin. The preparation method is simple and easy to operate, and the ice flower crystalline resin prepared by the method can be applied to the field of printed matter to prepare sheet materials or packaging hoses with ice flower crystalline effect. (2) The preparation process of the sheet material with ice flower crystallization effect, which is prepared by coating a high surface energy coating layer, a pattern layer and an ice flower crystallization resin layer on the printing substrate layer in sequence. The ice flower crystallization resin layer is dried by two groups of UV lamps with different powers in sequence. In the drying process of the low-power UV lamp, the surface layer of the resin shrinks due to the drying film formation, but the inner layer is still fluid, so the resin forms natural irregular cracks like ice flowers on the surface. After a period of sufficient cracking, the high-power UV lamp is used for complete curing and shaping to form the surface texture effect of the ice flower crystallization effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The preparation process flow chart of the sheet material with ice flower crystallization effect; Figure 2 The structure diagram of the sheet material with ice flower crystallization effect according to Example 5; Figure 3 The physical diagram of the packaging hose with ice flower crystallization effect according to Example 5; Among them, the substrate layer-101, the high surface energy coating layer-102, the pattern layer-103, and the ice flower crystallization resin layer-104. DETAILED DESCRIPTION

[0020] The application will be further described in detail below in conjunction with specific embodiments, but the embodiments of the application are not limited thereto. The materials used in the examples of the application can be purchased by marketable means.

[0021] Example 1 The preparation method of the ice flower crystallization resin according to the embodiment includes the following steps, (1) The epoxy acrylate resin (E-51 epoxy acrylate resin containing 2 epoxy functional groups), the polyurethane acrylate resin (aliphatic polyurethane acrylate resin containing 6 acrylate functional groups), the hexanediol diacrylate and the benzophenone type photoinitiator (2-hydroxybenzophenone and methoxybenzophenone in a mass ratio of 1.5:3) are prepared according to a mass ratio of 15:45:35:5; (2) The epoxy acrylate resin and the polyurethane acrylate resin are mixed at high speed to prepare a mixture I; the speed of the high-speed stirring is 8000-10000 rpm, and the temperature of the high-speed stirring is 50-60℃; (3) The hexanediol diacrylate is added to the mixture I and mixed at medium speed to prepare a mixture II; the speed of the medium-speed stirring is 5000-7000 rpm, and the temperature of the medium-speed stirring is 40-50℃; (4) adding the benzophenone photoinitiator to the mixture II, mixing at high frequency and low speed, storing in the dark, to prepare the ice flower crystal resin; the rotation speed of the high frequency and low speed mixing is 1000-1200 rpm, the vibration frequency of the high frequency and low speed mixing is 3000-5000 HZ, and the temperature of the high frequency and low speed mixing is 35-40℃.

[0022] Example 2 The ice flower crystal resin preparation method described in this example comprises the following steps, (1) preparing epoxy acrylate resin (E-51 epoxy acrylate resin containing 2 epoxy functional groups), polyurethane acrylate resin (aliphatic polyurethane acrylate resin containing 6 acrylate functional groups), hexanediol diacrylate, and benzophenone photoinitiator (2-hydroxybenzophenone and methoxybenzophenone in a mass ratio of 1.5:2.5) in a mass ratio of 20:35:30:4; (2) mixing the epoxy acrylate resin and the polyurethane acrylate resin at high speed to prepare mixture I; the rotation speed of the high speed mixing is 8000-10000 rpm, and the temperature of the high speed mixing is 50-60℃; (3) adding the hexanediol diacrylate to the mixture I, mixing at medium speed, to prepare mixture II; the rotation speed of the medium speed mixing is 5000-7000 rpm, and the temperature of the medium speed mixing is 40-50℃; (4) adding the benzophenone photoinitiator to the mixture II, mixing at high frequency and low speed, storing in the dark, to prepare the ice flower crystal resin; the rotation speed of the high frequency and low speed mixing is 1000-1200 rpm, the vibration frequency of the high frequency and low speed mixing is 3000-5000 HZ, and the temperature of the high frequency and low speed mixing is 35-40℃.

[0023] Example 3 The ice flower crystal resin preparation method described in this example comprises the following steps, (1) preparing epoxy acrylate resin (E-51 epoxy acrylate resin containing 2 epoxy functional groups), polyurethane acrylate resin (aliphatic polyurethane acrylate resin containing 6 acrylate functional groups), hexanediol diacrylate, and benzophenone photoinitiator (2-hydroxybenzophenone and methoxybenzophenone in a mass ratio of 1.5-2: 25-3) in a mass ratio of 15:35:30:4; (2) mixing the epoxy acrylate resin and the polyurethane acrylate resin at high speed to prepare mixture I; the rotation speed of the high speed mixing is 8000-10000 rpm, and the temperature of the high speed mixing is 50-60℃; (3) adding hexanediol diacrylate into the mixture I and mixing at a medium speed to prepare a mixture II; the speed of the medium speed stirring is 5000-7000 rpm, and the temperature of the medium speed stirring is 40-50℃; (4) adding a benzophenone photoinitiator into the mixture II and mixing at a high frequency and low speed, and storing in the dark to prepare the ice flower crystal resin; the speed of the high frequency and low speed stirring is 1000-1200 rpm, the vibration frequency of the high frequency and low speed stirring is 3000-5000 Hz, and the temperature of the high frequency and low speed stirring is 35-40℃.

[0024] Example 4 The preparation method of the ice flower crystal resin described in the embodiment comprises the following steps, (1) preparing an epoxy acrylate resin (E-51 epoxy acrylate resin containing 2 epoxy functional groups), a polyurethane acrylate resin (aliphatic polyurethane acrylate resin containing 6 acrylate functional groups), hexanediol diacrylate and a benzophenone photoinitiator (2-hydroxybenzophenone and methoxybenzophenone in a mass ratio of 1.5-2:25-3) according to a mass ratio of 20:40:33.5:4.5; (2) mixing the epoxy acrylate resin and the polyurethane acrylate resin at a high speed to prepare a mixture I; the speed of the high speed stirring is 8000-10000 rpm, and the temperature of the high speed stirring is 50-60℃; (3) adding hexanediol diacrylate into the mixture I and mixing at a medium speed to prepare a mixture II; the speed of the medium speed stirring is 5000-7000 rpm, and the temperature of the medium speed stirring is 40-50℃; (4) adding a benzophenone photoinitiator into the mixture II and mixing at a high frequency and low speed, and storing in the dark to prepare the ice flower crystal resin; the speed of the high frequency and low speed stirring is 1000-1200 rpm, the vibration frequency of the high frequency and low speed stirring is 3000-5000 Hz, and the temperature of the high frequency and low speed stirring is 35-40℃.

[0025] Example 5 (best effect) As Figure 1 The preparation process flow chart of the sheet material with the ice flower crystal effect is shown in the figure, and the preparation process of the sheet material with the ice flower crystal effect comprises the following steps, (a) coating a high surface energy coating layer (acrylate polymer coating layer) on a substrate layer (sheet-shaped full-plastic composite sheet material) under a 8100w UV lamp at a coating speed of 60-70 M / Min; (b) printing a pattern layer on the high surface energy coating layer at a printing speed of 70 M / Min; (c) The ice-flower crystal resin prepared in Example 1 was coated on the pattern layer by using a 150 LCM anilox roll or a 200 mesh screen at a coating speed of 60 M / min, and was dried by a 2000 W UV lamp and a 9000 W UV lamp in sequence to prepare a sheet having the best ice-flower crystal effect.

[0026] As shown in Figure 2 The structure of the sheet having the ice-flower crystal effect described in this example is shown in

[0027] As shown in Figure 3 The packaging hose having the ice-flower crystal effect is shown in

[0029] Example 6 (the lightest ice crystal effect) The preparation process of the sheet having the ice-flower crystal effect described in this example comprises the following steps, (a) The high surface energy coating (acrylate polymer coating) was coated on the substrate layer (sheet-shaped aluminized high-brightness sheet) by using a 400 LCM anilox roll under a 5000 W UV lamp at a coating speed of 70 M / min; (b) The pattern layer was printed on the high surface energy coating at a printing speed of 70 M / min; (c) The ice-flower crystal resin prepared in Example 1 was coated on the pattern layer by using a 200 LCM anilox roll or a 300 mesh screen at a coating speed of 70 M / min, and was dried by a 4000 W UV lamp and a 9000 W UV lamp in sequence to prepare a sheet having the light broken ice-flower crystal effect.

[0030] Example 7 (blocky snowflake effect) The preparation process of the sheet having the ice-flower crystal effect described in this example comprises the following steps, (a) The high surface energy coating (acrylate polymer coating) was coated on the substrate layer (sheet-shaped aluminized high-brightness sheet) by using a 300 LCM anilox roll under a 8100 W UV lamp at a coating speed of 60 M / min; (b) The pattern layer was printed on the high surface energy coating at a printing speed of 60-70 M / min; (c) The ice-flower crystal resin prepared in Example 1 was coated on the pattern layer by using a 100 LCM anilox roll or a 100 mesh screen at a coating speed of 60 M / min, and was dried by a 2000 W UV lamp and a 9000 W UV lamp in sequence to prepare a sheet having the blocky ice-flower crystal effect.

[0031] Comparative Example 1 The preparation process of the sheet of the present comparative example comprises the following steps, (a) coating the high surface energy coating layer (acrylate polymer coating layer) on the substrate layer (full plastic composite sheet) using a 300 LCM anilox roll under a 8100w UV lamp at a coating speed of 60 M / Min; (b) printing the pattern layer on the high surface energy coating layer at a printing speed of 60 M / Min; (c) coating the ice flower crystal resin prepared in Example 1 on the pattern layer using a 100 LCM anilox roll or a 100 mesh screen at a coating speed of 60 M / Min, and drying by flowing through a 1500W UV lamp only once to prepare a printed sheet with snowflake texture but incomplete drying on the surface and obvious scratches.

[0032] Comparative Example 2 The preparation process of the sheet of the present comparative example comprises the following steps, (a) coating the high surface energy coating layer (acrylate polymer coating layer) on the substrate layer (full plastic composite sheet) using a 400 LCM anilox roll under a 8100w UV lamp at a coating speed of 60 M / Min; (b) printing the pattern layer on the high surface energy coating layer at a printing speed of 60 M / Min; (c) coating the ice flower crystal resin prepared in Example 1 on the pattern layer using a 100 LCM anilox roll or a 100 mesh screen at a coating speed of 60 M / Min, and drying by flowing through a 8500W UV lamp to prepare a bright surface sheet without snowflake cracks.

[0033] Comparative Example 3 The preparation process of the sheet of the present comparative example comprises the following steps, (a) coating the high surface energy coating layer (acrylate polymer coating layer) on the substrate layer (full plastic composite sheet) using a 300 LCM anilox roll under a 8100w UV lamp at a coating speed of 70 M / Min; (b) printing the pattern layer on the high surface energy coating layer at a printing speed of 60 M / Min; (c) coating the ice flower crystal resin prepared in Example 1 on the pattern layer using a 400 LCM anilox roll or a 400 mesh screen at a coating speed of 60 M / Min, and drying by flowing through a 2000W UV lamp and a 9000W UV lamp in turn to prepare a printed sheet with only corrugated block texture.

[0034] Comparative Example 4 The preparation process of the sheet of the present comparative example comprises the following steps, (a) Coating high surface energy coating (acrylate polymer coating) on the substrate layer (full plastic composite sheet) using 300LCM~400LCM anilox roll at a coating speed of 60~70M / Min under the power of 8100w UV lamp; (b) Printing the pattern layer on the high surface energy coating at a printing speed of 60~70M / Min; (c) Coating the ice crystal resin prepared in Example 1 on the pattern layer using 100LCM~200LCM anilox roll or 100 mesh~300 mesh screen at a coating speed of 60~70M / Min, and then drying by flowing through 5000W UV lamp and 6000W UV lamp in sequence to prepare fine-grained printed sheet.

[0035] Compared with Examples 5 to 7, Comparative Example 1 shows that the sheet dried only once through a too-low-power UV lamp is not completely dried, and the printed sheet prepared has obvious scratches; Comparative Example 2 shows that the sheet dried only once through a high-power UV lamp is completely dried, and the surface of the prepared sheet is completely free of snowflake cracks, which does not meet the product design requirements; Comparative Example 3 shows that the ice crystal resin is coated too thinly, which causes uneven blocky surface, and the prepared sheet is only a corrugated blocky textured printed sheet, which also does not meet the product design requirements; and Comparative Example 4 shows that twice UV lamp power close to each other causes the printed sheet surface to form fine-grained, which also does not meet the product design requirements.

[0036] The present application realizes the ice crystal effect on the sheet surface through the special design of the screen dots and the adjustment of the plate making parameters, and through the flexographic printing and offset printing, etc. Compared with the existing silk printing or reverse printing which changes the surface morphology through the physical multi-layer coating or different wavelength UV drying, the present application has more extensive use scenarios, easier production implementation means and more competitive cost advantage.

[0037] The above examples are the preferred embodiments of the present application, but the embodiments of the present application are not limited by the above examples, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application should be equivalent replacement methods, and all are included in the protection scope of the present application.

Claims

1. A method of preparing a frost flower crystalline resin, characterized by, Comprising the following steps, (1) epoxy acrylate resin, polyurethane acrylate resin, hexanediol diacrylate and benzophenone type photoinitiator are prepared according to the mass fraction of 15~25:35~45:30~35:4~5; (2) the epoxy acrylate resin and polyurethane acrylate resin are mixed at high speed to prepare mixture I; (3) add hexanediol diacrylate to mixture I and mix at medium speed to prepare mixture II; (4) add benzophenone type photoinitiator to mixture II and mix at high frequency and low speed, store in the dark to prepare ice crystal resin; The epoxy acrylate resin in step (1) is E-51 epoxy acrylate resin containing 2 epoxy functional groups; the polyurethane acrylate resin is aliphatic polyurethane acrylate resin containing 6 acrylate functional groups; the benzophenone type photoinitiator is composed of 2-hydroxybenzophenone and methoxybenzophenone according to the mass fraction of 1.5~2:2.5~3.

2. The method for preparing ice flower crystal resin according to claim 1, characterized in that, The high-speed stirring speed in step (2) is 8000~10000 rpm, and the high-speed stirring temperature is 50~60℃.

3. The method for preparing ice flower crystal resin according to claim 1, characterized in that, The medium-speed stirring speed in step (3) is 5000~7000 rpm, and the medium-speed stirring temperature is 40~50℃.

4. The method for preparing ice flower crystal resin according to claim 1, characterized in that, The high-frequency low-speed stirring speed in step (4) is 1000~1200 rpm, the high-frequency low-speed stirring vibration frequency is 3000~5000 HZ, and the high-frequency low-speed stirring temperature is 35~40℃.

5. A dendritic resin characterized by, Prepared according to the preparation method of any one of claims 1 to 4.

6. A process for the production of a sheet material having a frost crystal effect, characterized in that Comprising the following steps, (a) under a power of 8100w UV lamp, use 300LCM~400LCM anilox roller to coat high surface energy coating on the substrate layer, the coating speed is 60~70M / Min; (b) print the pattern layer on the high surface energy coating, the printing speed is 60~70M / Min; (c) use 100LCM~200LCM anilox roller or 100 mesh~300 mesh screen to coat ice crystal resin layer on the pattern layer, the coating speed is 60~70M / Min, and then pass through 2000~4000W UV lamp and 7000~9000W UV lamp for leveling and drying to prepare the sheet with ice crystal effect.

7. The process for preparing a sheet having a frost crystal effect according to claim 6, characterized in that, The substrate layer in step (1) is one of tubular sleeve-shaped or sheet-shaped full-plastic composite sheet, aluminum-plastic composite sheet, and aluminized high-brightness sheet.

8. The process for preparing a sheet having a frost crystal effect according to claim 6, characterized by, The high surface energy coating in step (1) is acrylate polymer coating.

9. A sheet material having a frost crystal effect, characterized by Prepared according to the preparation process of any one of claims 6 to 8.

10. A packaging tube having a frost crystal effect, characterized in that Comprising a pipe head and a pipe body, the pipe body is prepared according to the sheet with ice crystal effect of claim 9.

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