A kind of laminated mirror cardboard and preparation method

Abstract

The invention discloses a laminated mirror paperboard and a preparation method, and relates to the technical field of mirror paperboard. The laminated mirror paperboard comprises a base layer, a honeycomb board layer, a bottom glue layer, a fiber segment, an upper glue layer, a reflection enhancement layer, a mirror film layer and an edge guard. The laminated mirror paperboard of the invention improves bending resistance by introducing a honeycomb board layer, and adopts a three-dimensional fiber reinforcement structure formed by the bottom glue layer, the fiber segment and the upper glue layer. The fiber segment is scattered and distributed in an irregular manner to form a three-dimensional mesh support, thereby improving tear resistance. In addition, in the preparation method of the laminated mirror paperboard, the use of a coating device is optimized, and the functions of spraying glue, spreading fiber, scraping glue and groove forming are integrated into one. Through the linkage design of the scraping glue component and the grooving component, intermittent grooves are formed while scraping the fibers, thereby enhancing the mechanical bite of the fibers and the glue layer. Moreover, through the three-station continuous operation mode of spraying bottom glue, spreading fiber and spraying surface glue, the production period can be greatly shortened, and the efficiency and quality of the preparation of the laminated mirror paperboard can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of mirror surface cardboard, in particular to a laminated mirror surface cardboard and a preparation method thereof. Background Art

[0002] As market competition becomes increasingly fierce and consumers' tastes continue to improve, the packaging industry is also facing great challenges. In recent years, the packaging and printing industry has been developing in the direction of energy conservation and environmental protection in line with the market. Mirror paperboard is one of them, which has been transformed from the original composite paper.

[0003] At present, China's patent application number: CN201920943837.8 discloses a water-resistant laminated mirror paperboard, including a paperboard body, an upper surface isolation structure and a lower surface isolation structure. The center layer of the paperboard body is filled with a filling layer, and the first mirror paperboard layer is adhered to the adhesive layer on the upper end surface of the filling layer, and the second mirror paperboard layer is adhered to the adhesive layer on the lower end surface of the filling layer, and the upper end surface of the first mirror paperboard layer is provided with an upper surface isolation structure.

[0004] However, the existing laminated mirror cardboard mostly adopts a single-layer substrate and a simple coating structure, which has weak mechanical properties, poor bending resistance and tearing resistance, and insufficient mechanical bite force between the glue layer and the fiber when using fiber reinforcement technology, and the interface is easy to debond; and in the preparation process of laminated mirror cardboard, a single spraying or manual fiber spreading method is mostly used, the production period is long and the quality of the prepared cardboard is poor. Summary of the Invention

[0005] The object of the present invention is to provide a laminated mirror paperboard and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a composite mirror paperboard, comprising a base layer, a honeycomb board layer, a bottom glue layer, a fiber segment, an upper glue layer, a reflection enhancing layer, a mirror film layer and an edge guard, wherein the upper surface of the inner part of the base layer is bonded and fixed with a honeycomb board layer, the upper surface of the honeycomb board layer is coated with a bottom glue layer, the top side of the bottom glue layer is bonded with an upper glue layer, and fiber segments are distributed between the bottom glue layer and the upper glue layer, the fiber segments are in a discontinuous and non-directional scattered distribution state, and the outer surface of the fiber segments undergoes a melt interpenetration reaction with the bottom glue layer and the upper glue layer, and the top side of the upper glue layer is bonded and fixed with a reflection enhancing layer. The reflection enhancing layer is laminated to a mirror film layer on the top side, the mirror film layer is wrapped with a protective edge on the outside, and the reflection enhancing layer and the mirror film layer are both arranged on the inside of the protective edge, the bottom side of the protective edge is laminated to the upper adhesive layer, and an anti-ultraviolet layer is provided on the inside of the top of the protective edge, the anti-ultraviolet layer is coated on top of the mirror film layer, the reflection enhancing layer is composed of a mixture of a transparent resin with a refractive index of 1.5-1.8 and nano-titanium dioxide particles, the mass proportion of nano-titanium dioxide is 5-15%, and inorganic microspheres are dispersed inside the upper adhesive layer, and the particle size of the inorganic microspheres is 0.1-0.5μm.

[0007] Preferably, the particle size of nano-titanium dioxide in the reflection enhancement layer is 20-50 nm, and its surface is modified with a silane coupling agent; the mirror film layer includes a transparent base film and a matte texture layer printed on the inner side of the transparent base film; the anti-ultraviolet layer is made of a blend of polyvinylidene fluoride and a benzotriazole ultraviolet absorber, and has a thickness of 2-10 μm.

[0008] Preferably, the fiber segment is a three-section coating structure, which comprises a polyvinyl alcohol outer layer, a polyurethane layer and a nylon core from the outside to the inside.

[0009] In addition, the present invention also provides a method for preparing a laminated mirror paperboard, comprising the following steps:

[0010] S1. Fix the honeycomb panel layer on the top side of the base layer by gluing;

[0011] S2. Place the base layer with the honeycomb panel layer into the glue coating equipment, spray the base glue layer and then sprinkle the fiber segments on it. Scrape the fiber segments on the base glue layer to make it smooth and scratch discontinuous grooves. Then spray the top glue layer on top of the base glue layer and the fiber segments.

[0012] S3. Laminating and fixing a mirror film layer on top of the reflection enhancing layer, and pasting the reflection enhancing layer and the mirror film layer into the edge protection, and then covering the anti-ultraviolet layer on the inner side of the top of the edge protection, so that the bottom side of the anti-ultraviolet layer is laminated and fixed to the mirror film layer;

[0013] S4, attaching and fixing the reflection enhancement layer and the edge protection layer on the adhesive layer processed in the above steps, and curing and forming them by hot pressing.

[0014] Preferably, the glue coating equipment includes a base frame, a top cover is fastened to the top side of the base frame, a first support roller and a second support roller are respectively provided on the left and right sides of the top cover, a driving body is installed on the left side of the inside of the base frame, the top side output end of the driving body is connected to the conveying body, and the conveying body is arranged on the bottom side of the top cover, and a first glue spraying head, a fiber spreading mechanism and a second glue spraying head are sequentially provided above the conveying body from left to right, and the first glue spraying head, the fiber spreading mechanism and the second glue spraying head are all connected to the inside of the top cover, a pad is provided inside the conveying body, the first support roller, the second support roller and the top end of the conveying body are located on the same horizontal plane, the first glue spraying head is used to spray to form a bottom glue layer above the honeycomb panel layer, a fiber bundle is passed through the fiber spreading mechanism for cutting the fiber yarns to form fiber yarn segments, and the second glue spraying head is used to spray to form an upper glue layer.

[0015] Preferably, the fiber-spreading mechanism includes a frame seat fastened to the middle side of the top cover, a whole groove structure is installed on the middle and lower side of the right part of the frame seat, a cylinder is installed on the top side of the right part of the frame seat, two cylinders are provided, which are respectively located at the front and rear sides of the frame seat, and the left output shafts of the two cylinders are connected to the first support block, and the two first support blocks are respectively slidably connected to the front and rear sides of the frame seat, and the middle sides of the two first support blocks are rotatably connected to the cutting rollers, and a positioning block is installed on the upper left side of the interior of the frame seat, and two positioning blocks are provided, respectively corresponding to the positions of the two first support blocks, and the right sides of the two positioning blocks are fastened with a second support block, and the middle sides of the two second support blocks are rotatably connected to the guide rollers, and the middle side of the rear of the guide rollers is connected to the front output end of the driving motor, and the driving motor is fastened to the upper left side of the rear of the frame seat, and a lower hopper is embedded in the middle and lower side of the interior of the frame seat, and the lower hopper is located below the cutting roller and the guide roller.

[0016] Preferably, the entire groove structure includes a cover seat fastened to the frame seat on the left side, a first motor installed on the upper left side of the cover seat, a screw connected to the bottom output end of the first motor, an internal thread block threadedly connected to the outer surface of the screw, a slider fixedly connected to the outside of the internal thread block, and a scraper assembly installed on the right side of the slider, and the upper middle part of the left side of the scraper assembly is in longitudinal sliding contact with the cover seat.

[0017] Preferably, the scraper assembly includes a frame fastened to the slider on the middle side of the rear, a scraper locked and fixed to the lower side of the front of the frame, a second motor fastened to the top side of the right part of the frame, and a groove component connected to the left output end of the second motor, the groove component is rotatably connected to the top side of the interior of the frame, and the rear side of the groove component is connected to the scraper.

[0018] Preferably, the grooving component includes an eccentric shaft that rotates through the top side of the plate frame, one end of the eccentric shaft is connected to the second motor, the outside of the eccentric shaft is wrapped with a push rod that rotates, a convex column piece that is rotatably connected to the bottom end of the push rod, a groove piece that is fixedly connected to the middle side of the top of the convex column piece, and a positioning bolt that passes through the inside of the groove piece, and one side of the positioning bolt is fastened to the scraper.

[0019] Preferably, two discs are eccentrically provided on the outer surface of the eccentric shaft, and the two discs are rotatably connected to the inside of the push rod. There are two push rods, grooves and positioning bolts, and the two grooves are located on the inner sides of the two push rods.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The composite mirror cardboard of the present invention can improve the bending resistance of the cardboard by introducing a honeycomb board layer, and adopts a three-dimensional fiber reinforcement structure formed by a bottom glue layer, fiber segments and an upper glue layer. The fiber segments are scattered in an irregular manner to form a three-dimensional mesh support, which improves the tear resistance. The three-layer coating structure of the fiber segments is tightly combined with the glue layer through a melt interpenetration reaction, thereby improving the interface bonding strength and solving the problem of easy debonding of traditional fibers.

[0022] The present invention optimizes the use of glue coating equipment in the preparation method of laminated mirror cardboard. The equipment integrates the functions of glue spraying, fiber spreading, glue scraping and groove forming. Through the linkage design of the glue scraping component and the grooving component, discontinuous grooves can be formed while scraping the fibers, thereby enhancing the mechanical bite of the fibers and the glue layer. Moreover, through the three-station continuous operation mode of spraying base glue, spreading fibers and spraying surface glue, the production period can be greatly shortened, and the efficiency and quality of the preparation of laminated mirror cardboard can be improved.

[0023] The present invention uses the cooperation between the screw and the internal thread block to enable the slider to drive the scraper assembly to move in the longitudinal direction, so that the bottom of the scraper assembly contacts and is close to the top of the base glue layer. The fiber filament segments are scraped flat on the base glue layer through the contact between the bottom of the scraper and the fiber filament segments, and the bottom position of the grooving component can perform a longitudinal reciprocating motion, so that the grooving component is inserted into the base glue layer after moving downward to scratch intermittent grooves, thereby enhancing the mechanical bite force and realizing the linked scraping and groove forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the laminated mirror paperboard of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the laminated mirror paperboard of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the fiber segment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the glue coating equipment of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the fiber spreading mechanism of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the whole tank structure of the present invention;

[0030] Figure 7 It is a right side structural schematic diagram of the scraper assembly of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the groove component of the present invention.

[0032] In the figure: base layer 1, honeycomb panel layer 2, bottom adhesive layer 3, fiber filament segment 4, top adhesive layer 5, reflection enhancement layer 6, mirror film layer 7, edge guard 8, polyvinyl alcohol outer layer 41, polyurethane layer 42, nylon core 43, bottom frame 90, top cover 91, first support roller 92, second support roller 93, driving body 94, conveying body 95, first glue spray head 96, fiber spreading mechanism 97, second glue spray head 98, support frame 951, frame seat 971, whole tank structure 972, cylinder 973, first support block 974, cutting roller 975, positioning Block-976, second support block-977, guide roller-978, drive motor-979, lower hopper-9710, cover seat-9721, first motor-9722, screw-9723, internal thread block-9724, slider-9725, scraper assembly-9726, plate frame-97261, scraper-97262, second motor-97263, grooving component-97264, eccentric shaft-972641, push rod-972642, boss piece-972643, groove piece-972644, positioning bolt-972645, disc-9726411. DETAILED DESCRIPTION

[0033] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0034] See also Figure 1 、 Figure 2 and Figure 3The present invention provides a composite mirror paperboard, comprising a base layer 1, a honeycomb board layer 2, a bottom glue layer 3, a fiber segment 4, an upper glue layer 5, a reflection enhancement layer 6, a mirror film layer 7 and a side guard 8. The upper surface of the inner part of the base layer 1 is bonded and fixed with the honeycomb board layer 2 to increase the bending resistance of the paperboard through the honeycomb structure. The upper surface of the honeycomb board layer 2 is coated with the bottom glue layer 3 to provide a preliminary bonding interface and enhance the interlayer bonding force. The top side of the bottom glue layer 3 is bonded with the upper glue layer 5, and the fiber segment 4 is distributed between the bottom glue layer 3 and the upper glue layer 5 to form a three-dimensional mesh support to improve the tear resistance. The fiber segment 4 is in a discontinuous and non-directional scattered distribution state, and the outer surface of the fiber segment 4 undergoes a melt interpenetration reaction with the bottom glue layer 3 and the upper glue layer 5. The interpenetration of the fiber segment 4 improves the interface bonding strength. The enhancement layer 6 and the top side of the reflection enhancement layer 6 are covered with a mirror film layer 7 to improve the mirror reflectivity through the reflection enhancement layer 6. The outside of the mirror film layer 7 is wrapped with a protective edge 8, and the reflection enhancement layer 6 and the mirror film layer 7 are both arranged on the inside of the protective edge 8. The bottom side of the protective edge 8 is bonded to the upper adhesive layer 5 to prevent separation and cracking between the layers. An anti-ultraviolet layer is provided on the inner side of the top of the protective edge 8. The anti-ultraviolet layer is coated on the mirror film layer 7 to prevent yellowing and aging. The reflection enhancement layer 6 is composed of a mixture of a transparent resin with a refractive index of 1.5-1.8 and nano-titanium dioxide particles. The mass proportion of nano-titanium dioxide is 5-15%, which optimizes the balance between light scattering efficiency and light transmittance uniformity. Inorganic microspheres are dispersed inside the upper adhesive layer 5, and the particle size of the inorganic microspheres is 0.1-0.5μm, which reduces the shrinkage and deformation of the adhesive layer and improves the flatness of the mirror surface.

[0035] Among them, the particle size of nano-titanium dioxide in the reflection enhancement layer 6 is 20-50nm, and its surface is modified with a silane coupling agent to enhance the dispersion of nano-particles and avoid agglomeration failure; the mirror film layer 7 includes a transparent base film and a matte texture layer printed on the inner side of the transparent base film; the anti-ultraviolet layer is made of a blend of polyvinylidene fluoride and benzotriazole ultraviolet absorbers, with a thickness of 2-10μm, which synergistically exerts the dual protection effects of physical shielding and chemical absorption of ultraviolet rays. The fiber segment 4 is a three-section coating structure, which is composed of a polyvinyl alcohol outer layer 41, a polyurethane layer 42 and a nylon core 43 from the outside to the inside. The polyvinyl alcohol outer layer 41 reacts with the glue to enhance the bonding force, the polyurethane layer 42 buffers the stress, and the nylon core 43 provides support to form a physical anchoring structure to enhance the bonding performance with the glue, and can disperse stress and improve the bending resistance of the cardboard.

[0036] See also Figure 1 、 Figure 2 and Figure 4-Figure 8 The present invention provides a method for preparing a laminated mirror paperboard, comprising the following steps:

[0037] S1, fix the honeycomb panel layer 2 on the top side of the base layer 1 by gluing;

[0038] S2. Place the base layer 1 with the honeycomb panel layer 2 into a coating device, spray a primer layer 3, and then sprinkle fiber segments 4 on it. Scrape the fiber segments 4 on the primer layer 3 to smooth it and create intermittent grooves with a depth of 0.1-0.3 mm to enhance mechanical bite. Then, spray a top glue layer 5 on top of the primer layer 3 and the fiber segments 4. The double glue layer encapsulates the fiber segments to form a three-dimensional reinforced structure.

[0039] S3. Laminating and fixing a mirror film layer 7 on the reflection enhancing layer 6. The reflection enhancing layer 6 and the mirror film layer 7 are optically matched to improve the reflectivity. The reflection enhancing layer 6 and the mirror film layer 7 are then pasted into the edge protection 8. The anti-ultraviolet layer is then covered on the inner side of the top of the edge protection 8. The bottom side of the anti-ultraviolet layer is laminated and fixed to the mirror film layer 7.

[0040] S4. Fix the reflection enhancement layer 6 and the edge protection 8 on the adhesive layer 5 after the above steps, and heat press and solidify them. The heat press temperature is 120-150 degrees and the pressure is 0.5-1.5 MPa to ensure that there are no bubbles between the layers.

[0041] Among them, the glue coating equipment includes a base frame 90, a top cover 91 is fastened to the top side of the base frame 90, and a first support roller 92 and a second support roller 93 are respectively provided on the left and right sides of the top cover 91. A driving body 94 is installed on the left side of the inside of the base frame 90, and the top side output end of the driving body 94 is connected to the conveying body 95, and the conveying body 95 is arranged on the bottom side of the top cover 91 to support and convey the base layer 1 and the honeycomb board layer 2 through the conveying body 95. A first glue spraying head 96, a fiber spreading mechanism 97 and a second glue spraying head 98 are arranged above the conveying body 95 from left to right, and the first glue spraying head 96, the fiber spreading mechanism 97 and the second glue spraying head 98 are all connected to the inside of the top cover 91, and the production efficiency is improved through three-station continuous operation. A pad 951 is set inside the conveying body 95, and the first roller 92, the second roller 93 and the top of the conveying body 95 are located on the same horizontal plane. The first glue spraying head 96 is used to spray and form a bottom glue layer 3 above the honeycomb plate layer 2. The fiber spreading mechanism 97 is penetrated by a fiber bundle for cutting the fiber to form a fiber segment 4, so that the cut fiber segment 4 falls on the bottom glue layer 3. The second glue spraying head 98 is used to spray and form an upper glue layer 5, so that the upper glue layer covers the bottom glue layer 3 and the fiber segment 4 to form a three-dimensional reinforced structure.

[0042] Among them, the fiber spreading mechanism 97 includes a frame seat 971 fastened to the middle side of the top cover 91, and a whole groove structure 972 is installed on the middle and lower side of the right part of the frame seat 971, which links the scraping glue and the groove molding to improve the integration of the process. A cylinder 973 is installed on the top side of the right part of the frame seat 971. There are two cylinders 973, which are respectively located on the front and rear sides of the frame seat 971. The left output shafts of the two cylinders 973 are connected to the first support blocks 974, and the two first support blocks 974 are respectively slidably connected to the front and rear sides of the frame seat 971. The middle side of the two first support blocks 974 is rotatably connected to the cutting roller 975, so that the first support block 974 drives the cutting roller 975 to change its lateral position through the cylinder 973. A positioning block 976 is installed on the upper left side of the interior of the frame seat 971, and there are two positioning blocks 976, which are respectively connected to the two first support blocks 97 4, a second support block 977 is fastened to the right side of the two positioning blocks 976, and the middle side of the two second support blocks 977 is rotatably connected to the guide roller 978, and the middle side of the rear part of the guide roller 978 is connected to the front output end of the drive motor 979. The drive motor 979 is fastened to the upper left side of the rear part of the frame seat 971 to drive the guide roller 978 to rotate through the drive motor 979, and the cutting roller 975 is moved laterally to contact the side of the guide roller 978 to allow the fiber bundle to pass through the inside. The fiber bundle is cut into fiber segments 4 by the rotation cooperation of the cutting roller 975 and the guide roller 978, and a lower hopper 9710 is embedded in the middle and lower side of the interior of the frame seat 971, and the lower hopper 9710 is located below the cutting roller 975 and the guide roller 978, so that the fiber segments 4 fall after passing through the lower hopper 9710 to fall onto the bottom glue layer 3.

[0043] 9721 , which is a screw threaded part of the cover 9721, is screwed to the outer surface of the screw 9723, and the slider 9725 is fixedly connected to the outer side of the inner threaded part 9724. The slider 9725 is a screw threaded part of the cover 9721, which is a screw threaded part of the cover 9721, and the slider 9725 is fixedly connected to the outer side of the inner threaded part 9724. The slider 9725 is a screw threaded part of the cover 9721, and the slider 9725 is a screw threaded part of the cover 9721, which is screwed to the outer surface of the screw 9723, and the slider 9725 is fixedly connected to the outer side of the inner threaded part 9724. The slider 9725 drives the scraper assembly 9726 to move in the longitudinal direction through the cooperation between the screw 9723 and the inner threaded part 9724, so that the bottom of the scraper assembly 9726 contacts and is close to the top of the bottom glue layer 3, realizing the linkage scraping and groove forming. The upper and middle part of the left side of the scraper assembly 9726 slides longitudinally with the cover 9721 to ensure the stability of the longitudinal displacement of the scraper assembly 9726. The middle side of the plate frame 97261 is fastened to the slider 9725, and the scraper 97262 is locked and fixed to the lower front side of the plate frame 97261. The fiber segment 4 is scraped flat on the bottom glue layer 3 by the contact between the bottom of the scraper 97262 and the fiber segment 4. The second motor 97263 is fastened to the top side of the right part of the plate frame 97261 and the groove component 97264 is connected to the left output end of the second motor 97263. The groove component 97264 is rotatably connected to the plate frame 972 On the top side of the interior of 61, under the action of the second motor 97263, the bottom position of the grooving component 97264 makes a reciprocating motion in the longitudinal direction, so that the grooving component 97264 is inserted into the base glue layer 3 after moving downward to scratch a groove, and the reciprocating motion of the grooving component 97264 is used to scratch intermittent grooves to enhance the mechanical bite force. The rear side of the grooving component 97264 is connected to the scraper 97262 to ensure the displacement stability of the grooving component 97264.

[0044] Among them, the groove component 97264 includes an eccentric shaft 972641 that rotates through the top side of the plate frame 97261, one end of the eccentric shaft 972641 is connected to the second motor 97263, and the outside of the eccentric shaft 972641 is wrapped with a push rod 972642 for rotation. Under the action of the second motor 97263, the eccentric shaft 972641 drives the push rod 972642 to perform a reciprocating longitudinal swing movement, a convex column piece 972643 connected to the bottom end of the push rod 972642, a groove piece 972644 fixedly connected to the middle side of the top of the convex column piece 972643, and a positioning bolt 972645 that runs through the interior of the groove piece 972644. The push rod 972642 drives the convex column piece 972643 to rotate between the groove piece 972644 and the positioning bolt 972645. Under the cooperation and limiting action of 72645, it moves in the longitudinal direction, thereby drawing a groove after the convex column piece 972643 is inserted into the bottom glue layer 3, and one side of the positioning bolt 972645 is fastened to the scraper 97262. Two discs 9726411 are eccentrically provided on the outer surface of the eccentric shaft 972641, and the two discs 9726411 are rotatably connected to the inside of the push rod 972642, so as to realize the longitudinal reciprocating displacement of the push rod 972642 through the eccentric rotation of the disc 9726411 and the cooperation with the push rod 972642. There are two push rods 972642, groove pieces 972644 and positioning bolts 972645, and the two groove pieces 972644 are located on the inner side of the two push rods 972642 to ensure the stability of the longitudinal displacement of the convex column piece 972643.

[0045] The working principle of the coating equipment is as follows:

[0046] 97. The glue coating device is placed at a position where glue coating is required on the honeycomb panel layer 2 through the base frame 90. The fiber bundle is then passed through the guide roller 978 and the inner side of the cutting roller 975. The cylinder 973 is controlled to start, so that the cylinder 973 drives the first support block 974 and the cutting roller 975 to shift laterally, so that the cutting roller 975 presses the fiber bundle against the side of the guide roller 978. The first glue spraying head 96 is then connected to the glue end of the bottom glue layer 3, and the second glue spraying head 98 is connected to the glue end of the upper glue layer 5. Then, according to the height position required for the top side after the bottom glue layer 3 is sprayed, the first motor 9722 is controlled to start. The first motor 9722 drives the screw 9723 to rotate. The cooperation between the screw 9723 and the internal thread block 9724 causes the slider 9725 to drive the glue scraping assembly 9726 to move in the longitudinal direction, so that the bottom of the scraper 97262 moves to a height position above the height position after the bottom glue layer 3 is sprayed.

[0047] Second, the base layer 1 with the honeycomb panel layer 2 is passed through the first support roller 92 and onto the conveying body 95. The driving body 94 is controlled and started so that the conveying body 95 drives the base layer 1 and the honeycomb panel layer 2 to be shifted and conveyed. After moving to the bottom of the first glue spraying head 96, the first glue spraying head 96 sprays glue to form a bottom glue layer 3 on the honeycomb panel layer 2. After spraying the glue, it moves to the bottom of the lower hopper 9710. As the driving motor 979 is started, the guide roller 978 and the cutting roller 975 rotate to guide and cut the fiber tow passing through the inner side thereof. After the fiber tow is cut, the fiber segment 4 is formed, so that the fiber segment 4 falls onto the bottom glue layer 3 through the lower hopper 9710.

[0048] Third, after the fiber segments 4 are scattered, the fiber segments 4 continue to move to the right, so that they are scraped flat on the top of the base rubber layer 3 after contacting the scraper 97262. Then, under the action of the second motor 97263, the eccentric shaft 972641 drives the push rod 972642 to perform a reciprocating longitudinal swinging action. The push rod 972642 drives the protruding column piece 972643 to move in the longitudinal direction under the cooperative limiting action of the groove piece 972644 and the positioning pin 972645. As a result, the protruding column piece 972643 is inserted into the interior of the base rubber layer 3 to scratch a groove. The reciprocating action of the protruding column piece 972643 realizes the scratching of intermittent grooves on the base rubber layer 3.

[0049] Fourth, after the scraping groove treatment, it moves to the bottom of the second glue spraying head 98, and the second glue spraying head 98 sprays glue with inorganic microspheres on the bottom glue layer 3 and the fiber filament segment 4 to form an upper glue layer 5, thereby forming a three-dimensional reinforced structure through the cooperation of the upper glue layer 5, the bottom glue layer 3 and the fiber filament segment 4. After spraying the upper glue layer 5, it is moved out for processing through the second support roller 93.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A laminated mirror paperboard, characterized by: The invention comprises a base layer (1), wherein a honeycomb plate layer (2) is bonded and fixed to the inner upper surface of the base layer (1), the upper surface of the honeycomb plate layer (2) is coated with a base glue layer (3), the top side of the base glue layer (3) is bonded with an upper glue layer (5), and fiber segments (4) are distributed between the base glue layer (3) and the upper glue layer (5), the fiber segments (4) are in a discontinuous and non-directional scattered distribution state, and the outer surface of the fiber segments (4) undergoes a melt interpenetration reaction with the base glue layer (3) and the upper glue layer (5), the top side of the upper glue layer (5) is bonded and fixed with a reflection enhancement layer (6), and the top side of the reflection enhancement layer (6) is bonded and covered with a mirror film layer. (7), the outer side of the mirror film layer (7) is wrapped with a protective edge (8), and the reflection enhancement layer (6) and the mirror film layer (7) are both arranged on the inner side of the protective edge (8), the bottom side of the protective edge (8) is in contact with the upper adhesive layer (5), and the inner side of the top of the protective edge (8) is provided with an anti-ultraviolet layer, and the anti-ultraviolet layer is coated on the upper side of the mirror film layer (7), the reflection enhancement layer (6) is composed of a mixture of a transparent resin with a refractive index of 1.5-1.8 and nano-titanium dioxide particles, and the mass proportion of the nano-titanium dioxide is 5-15%, and inorganic microspheres are dispersed inside the upper adhesive layer (5), and the particle size of the inorganic microspheres is 0.1-0.5μm.

2. The mirror-coated cardboard according to claim 1, characterized in that: The particle size of the nano-titanium dioxide in the reflection enhancement layer (6) is 20-50 nm, and its surface is modified by a silane coupling agent; the mirror film layer (7) comprises a transparent base film and a matte texture layer printed on the inner side of the transparent base film; the anti-ultraviolet layer is made of a mixture of polyvinylidene fluoride and a benzotriazole ultraviolet absorber, and has a thickness of 2-10 μm.

3. The mirror-coated cardboard according to claim 1, characterized in that: The fiber segment (4) is a three-section coating structure, which comprises, from the outside to the inside, a polyvinyl alcohol outer layer (41), a polyurethane layer (42), and a nylon core (43).

4. The method for preparing the laminated mirror paperboard according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, fixing the honeycomb panel layer (2) on the top side of the base layer (1) by gluing; S2, placing the base layer (1) with the honeycomb panel layer (2) into a coating device, spraying a base glue layer (3) and then sprinkling fiber segments (4), scraping the fiber segments (4) on the base glue layer (3) to make them smooth and cut intermittent grooves, and then spraying a top glue layer (5) on top of the base glue layer (3) and the fiber segments (4); S3, attaching and fixing the mirror film layer (7) above the reflection enhancement layer (6), attaching the reflection enhancement layer (6) and the mirror film layer (7) into the edge protection (8), and then covering the anti-ultraviolet layer on the inner side of the top of the edge protection (8), so that the bottom side of the anti-ultraviolet layer is attached and fixed to the mirror film layer (7); S4, attaching and fixing the reflection enhancement layer (6) and the edge protection (8) on the adhesive layer (5) processed in the above steps, and curing and forming them by hot pressing.

5. The method for preparing a laminated mirror paperboard according to claim 4, characterized in that: The glue coating device includes a base frame (90), a top cover (91) is fastened to the top side of the base frame (90), a first support roller (92) and a second support roller (93) are respectively provided on the left and right sides of the top cover (91), a driving body (94) is installed on the left side of the inside of the base frame (90), the top side output end of the driving body (94) is connected to the conveying body (95), and the conveying body (95) is provided on the bottom side of the top cover (91), and a first glue spraying head (96), a fiber spreading mechanism (97) and a second glue spraying head (98) are sequentially provided above the conveying body (95) from left to right, and the first glue spraying head (96), a fiber spreading mechanism (97) and a second glue spraying head (98) are sequentially provided above the conveying body (95). A glue spray head (96), a fiber spreading mechanism (97) and a second glue spray head (98) are all connected to the inside of the top cover (91); a pad frame (951) is provided inside the conveying body (95); the first support roller (92), the second support roller (93) and the top end of the conveying body (95) are located on the same horizontal plane; the first glue spray head (96) is used for spraying to form a bottom glue layer (3) above the honeycomb plate layer (2); a fiber bundle is passed through the inside of the fiber spreading mechanism (97) for cutting the fiber filaments to form fiber segments (4); and the second glue spray head (98) is used for spraying to form an upper glue layer (5).

6. The method for preparing a laminated mirror paperboard according to claim 5, characterized in that: The fiber spreading mechanism (97) includes a frame seat (971) fastened to the middle side of the top cover (91), a whole groove structure (972) is installed on the middle and lower side of the right part of the frame seat (971), and a cylinder (973) is installed on the top side of the right part of the frame seat (971). There are two cylinders (973), which are respectively located on the front and rear sides of the frame seat (971). The left output shafts of the two cylinders (973) are connected to the first support blocks (974), and the two first support blocks (974) are respectively slidably connected to the front and rear sides of the frame seat (971). The middle side of the two first support blocks (974) is rotatably connected to the cutting roller (975). The upper left side of the frame seat (971) is connected to the cutting roller (975). A positioning block (976) is installed on the side, and two positioning blocks (976) are provided, corresponding to the positions of the two first support blocks (974) respectively. The right sides of the two positioning blocks (976) are fastened with a second support block (977). The middle sides of the two second support blocks (977) are rotatably connected to a guide roller (978), and the middle side of the rear of the guide roller (978) is connected to the front output end of the drive motor (979). The drive motor (979) is fastened to the upper left side of the rear of the frame seat (971). A lower hopper (9710) is embedded in the middle and lower side of the frame seat (971), and the lower hopper (9710) is located below the cutting roller (975) and the guide roller (978).

7. The method for preparing a laminated mirror paperboard according to claim 6, characterized in that: The entire slot structure (972) comprises a cover seat (9721) fastened to the frame seat (971) on the left side, a first motor (9722) mounted on the upper left side of the cover seat (9721), a screw (9723) connected to the bottom output end of the first motor (9722), an internal thread block (9724) threadedly connected to the outer surface of the screw (9723), a slider (9725) fixedly connected to the outer side of the internal thread block (9724), and a scraper assembly (9726) mounted on the right side of the slider (9725), wherein the upper middle portion of the left side of the scraper assembly (9726) is in longitudinal sliding contact with the cover seat (9721).

8. The method for preparing a laminated mirror-surface cardboard according to claim 7, characterized in that: The scraper assembly (9726) comprises a plate frame (97261) fastened to the slider (9725) at the middle of the rear portion, a scraper (97262) locked and fixed to the lower front side of the plate frame (97261), a second motor (97263) fastened to the top right side of the plate frame (97261), and a groove component (97264) connected to the left output end of the second motor (97263). The groove component (97264) is rotatably connected to the top inner side of the plate frame (97261), and the rear side of the groove component (97264) is connected to the scraper (97262).

9. The method for preparing a laminated mirror-surface cardboard according to claim 8, characterized in that: The groove component (97264) includes an eccentric shaft (972641) that passes through and rotates on the top side of the plate frame (97261), one end of the eccentric shaft (972641) is connected to the second motor (97263), the eccentric shaft (972641) is wrapped with a push rod (972642) that rotates, a convex column piece (972643) that is rotatably connected to the bottom end of the push rod (972642), a groove piece (972644) that is fixedly connected to the middle side of the top of the convex column piece (972643), and a positioning bolt (972645) that passes through and is arranged inside the groove piece (972644), and one side of the positioning bolt (972645) is fastened to the scraper (97262).

10. The method for preparing a laminated mirror paperboard according to claim 9, characterized in that: Two discs (9726411) are eccentrically provided on the outer surface of the eccentric shaft (972641), and the two discs (9726411) are rotatably connected to the inside of a push rod (972642). Two push rods (972642), two grooves (972644) and two positioning bolts (972645) are each provided, and the two grooves (972644) are located on the inner sides of the two push rods (972642).

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