Laminated mirror surface paperboard and preparation method thereof

Abstract

The invention discloses a laminated mirror surface paperboard and a preparation method, and relates to the technical field of mirror surface paperboards, the laminated mirror surface paperboard comprises a subbase layer, a honeycomb plate layer, a bottom glue layer, a fiber yarn section, an upper glue layer, a reflection enhancement layer, a mirror surface film layer and a safe edge; according to the laminated mirror surface paperboard, the bending resistance is improved by introducing the honeycomb plate layer, a three-dimensional fiber reinforced structure formed by the bottom adhesive layer, the fiber yarn sections and the upper adhesive layer is adopted, the fiber yarn sections are distributed in a non-directional scattering mode, three-dimensional net-shaped supporting is formed, and the tear resistance is improved; and in addition, in the preparation method of the laminated mirror surface paperboard, glue coating equipment is optimally used, the functions of glue spraying, fiber scattering, glue scraping and groove forming are integrated, through the linkage design of a glue scraping assembly and a groove scratching component, intermittent grooves are formed while fibers are scraped to be flat, mechanical engagement of the fibers and a glue layer is enhanced, and the mechanical property of the laminated mirror surface paperboard is improved. And through a three-station continuous operation mode of primer spraying, fiber scattering and surface glue spraying, the production period can be greatly shortened, and the preparation efficiency and quality of the laminated mirror surface paperboard are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mirror cardboard, and particularly to a composite film mirror cardboard and a preparation method thereof. Background Art

[0002] With the continuous intensification of market competition and the continuous improvement of consumers' tastes, 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 along with the market trend. Mirror cardboard is one of them, which has evolved from the original composite paper.

[0003] Currently, Chinese Patent Application No.: CN201920943837.8 discloses a composite film mirror cardboard with good water resistance, including a cardboard body, an upper surface layer isolation structure and a lower surface layer isolation structure. A filling layer is filled in the central layer of the cardboard body, and a first mirror cardboard layer is adhered to the adhesive layer on the upper end surface of the filling layer, and a second mirror cardboard layer is adhered to the adhesive layer on the lower end surface of the filling layer. Moreover, an upper surface layer isolation structure is arranged on the upper end surface of the first mirror cardboard layer.

[0004] However, the existing composite film mirror cardboard mostly adopts a single-layer base material and a simple film laminating structure, with relatively weak mechanical properties, poor anti-bending and anti-tearing properties. And when using the fiber reinforcement technology, the mechanical bite force between the adhesive layer and the fiber is insufficient, and the interface is prone to debonding. Also, in the preparation process of the composite film mirror cardboard, a single spraying adhesive or manual fiber scattering method is mostly used, resulting in a long production period and poor quality of the prepared cardboard. Summary of the Invention

[0005] The purpose of the present invention is to provide a composite film mirror cardboard and a preparation method thereof to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A laminated mirror cardboard, comprising a bottom base layer, a honeycomb board layer, a bottom glue layer, fiber filament segments, an upper glue layer, a reflection enhancement layer, a mirror film layer and a protective edge. The upper surface of the inner part of the bottom base layer is fixedly attached 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 filament segments are distributed between the bottom glue layer and the upper glue layer. The fiber filament segments are in a non - continuous and non - directional scattered distribution state, and the outer surface of the fiber filament segments undergoes a melt interpenetration reaction with the bottom glue layer and the upper glue layer. The top side of the upper glue layer is fixedly attached with a reflection enhancement layer. The top side of the reflection enhancement layer is covered with a mirror film layer. The outside of the mirror film layer is wrapped with a protective edge, and both the reflection enhancement layer and the mirror film layer are arranged inside the protective edge. The bottom side of the protective edge is attached to the upper glue layer, and an anti - ultraviolet layer is arranged inside the top of the protective edge. The anti - ultraviolet layer is coated above the mirror film layer. The reflection enhancement layer is composed of a transparent resin with a refractive index of 1.5 - 1.8 and nano - titanium dioxide particles, and the mass ratio of nano - titanium dioxide is 5 - 15%. Inorganic microspheres are dispersed in the upper glue 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 - 50nm, and its surface is modified by 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 by blending polyvinylidene fluoride and benzotriazole - type ultraviolet absorber, and the thickness is 2 - 10μm.

[0008] Preferably, the fiber filament segment is a three - layer coated structure, from outside to inside are a polyvinyl alcohol outer layer, a polyurethane layer and a nylon core.

[0009] In addition, the present invention also provides a preparation method of the laminated mirror cardboard, comprising the following steps:

[0010] S1. Fix the honeycomb board layer on the top side of the bottom base layer through glue;

[0011] S2. Put the bottom base layer with the honeycomb board layer into a glue - coating device, spray the bottom glue layer, sprinkle the fiber filament segments, scrape the fiber filament segments flat on the bottom glue layer and draw intermittent grooves, and then spray the upper glue layer above the bottom glue layer and the fiber filament segments;

[0012] S3. Fix the mirror film layer above the reflection enhancement layer, put the reflection enhancement layer and the mirror film layer into the protective edge, and then cover the anti - ultraviolet layer on the inner side of the top of the protective edge, so that the bottom side of the anti - ultraviolet layer is fixedly attached to the mirror film layer;

[0013] S4. Fix the reflection enhancement layer and the protective edge above the upper glue layer processed by the above steps, and cure by hot pressing.

[0014] Preferably, the rubber coating device includes a chassis, a top cover is fastened to the top side of the chassis, a first support roller and a second support roller are respectively arranged on the left and right sides of the top cover, a driving body is installed on the left side inside the chassis, the output end of the top side of the driving body is connected to a conveying body, and the conveying body is arranged on the bottom side inside the top cover. Above the conveying body, a first glue spraying head, a fiber spreading mechanism and a second glue spraying head are arranged in sequence from left to right, and the first glue spraying head, the fiber spreading mechanism and the second glue spraying head are all connected inside the top cover. A cushion rack is arranged inside the conveying body. The top ends of the first support roller, the second support roller and the conveying body are on the same horizontal plane. The first glue spraying head is used to spray and form a bottom glue layer above the honeycomb board layer. The fiber spreading mechanism is penetrated by a fiber filament bundle to cut the fiber filament into fiber filament segments. The second glue spraying head is used to spray and form an upper glue layer.

[0015] Preferably, the fiber spreading mechanism includes a frame seat fastened to the middle side inside the top cover, a slotting structure is installed on the lower middle 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. There are two cylinders, which are respectively located on the front and rear sides of the frame seat. The left output shafts of the two cylinders are both connected with a first support block, and the two first support blocks are respectively slidably connected to the front and rear sides inside the frame seat. A cutting roller is rotatably connected to the middle side inside the two first support blocks. A positioning block is installed on the upper left side inside the frame seat, and there are two positioning blocks, which are respectively corresponding to the positions of the two first support blocks. Second support blocks are fastened to the right sides of the two positioning blocks. A guide roller is rotatably connected to the middle side inside the two second support blocks, and the middle side of the rear part of the guide roller is connected to the front output end of the driving motor. The driving motor is fastened to the upper left side of the rear part of the frame seat. A feeding hopper is embedded in the lower middle side inside the frame seat, and the feeding hopper is located below the cutting roller and the guide roller.

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

[0017] Preferably, the glue scraping component includes a plate frame fastened to the middle side of the rear part of the slider, a scraper locked and fixed to the lower front part of the plate frame, a second motor fastened to the upper right side of the plate frame, and a grooving component connected to the left output end of the second motor. The grooving component is rotatably connected to the top side inside the plate frame, and the rear side of the grooving component is connected to the scraper.

[0018] Preferably, the grooving component includes an eccentric shaft rod rotatably penetrating through the top side inside the plate frame. One end of the eccentric shaft rod is connected to the second motor. A push rod is wrapped and rotatably connected to the outside of the eccentric shaft rod. A convex column piece is rotatably connected to the bottom end of the push rod. A groove piece is fixedly connected to the middle side of the top of the convex column piece. A positioning bolt is disposed through the inside of the groove piece. One side of the positioning bolt is fastened to the scraping plate.

[0019] Preferably, two circular plates are eccentrically arranged on the outer surface of the eccentric shaft rod, and the two circular plates are rotatably connected to the inside of the push rod. There are two push rods, groove pieces and positioning bolts, and the two groove pieces are located inside the two push rods.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The composite film mirror cardboard of the present invention can improve the anti-bending property of the cardboard by introducing a honeycomb board layer, and adopts a three-dimensional fiber reinforcement structure formed by a bottom glue layer, fiber filament segments and an upper glue layer. The fiber filament segments are scattered randomly without orientation to form a three-dimensional network support, which improves the anti-tearing performance. Moreover, the three-layer coating structure of the fiber filament segments is tightly combined with the glue layer through a melt interpenetration reaction, improving the interfacial bonding strength and solving the problem of easy debonding of traditional fibers.

[0022] In the preparation method of the composite film mirror cardboard of the present invention, a glue coating device is optimized. The device integrates functions of glue spraying, fiber spreading, glue scraping and groove forming. Through the linkage design of the glue scraping component and the grooving component, intermittent grooves can be formed while scraping the fibers flat, enhancing the mechanical bite between the fibers and the glue layer. And through the three-station continuous operation mode of spraying bottom glue, spreading fibers and spraying surface glue, the production period can be greatly shortened, and the efficiency and quality of the preparation of the composite film mirror cardboard can be improved.

[0023] In the present invention, through the cooperation of the screw rod and the internal thread block, the slider drives the glue scraping component to move longitudinally, so that the bottom of the glue scraping component contacts and approaches above the bottom glue layer. The fiber filament segments are scraped flat on the bottom glue layer by the contact between the bottom of the scraping plate and the fiber filament segments. And the bottom position of the grooving component can make a reciprocating movement longitudinally, so that the grooving component inserts into the bottom glue layer after moving downward to scrape out intermittent grooves to enhance the mechanical bite force, realizing the linkage of glue scraping and groove forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of the composite film mirror cardboard of the present invention;

[0025] Figure 2 is a schematic structural view inside the composite film mirror cardboard of the present invention;

[0026] Figure 3 is a schematic structural view of the fiber filament segments of the present invention;

[0027] Figure 4 Schematic structural diagram of the rubber - coating equipment of the present invention;

[0028] Figure 5 Schematic structural diagram of the fiber - spreading mechanism of the present invention;

[0029] Figure 6 Schematic structural diagram of the integral trough structure of the present invention;

[0030] Figure 7 Right - view structural diagram of the rubber - scraping assembly of the present invention;

[0031] Figure 8 Schematic structural diagram of the grooving component of the present invention.

[0032] In the figure: base layer - 1, honeycomb board layer - 2, base glue layer - 3, fiber - filament segment - 4, upper glue layer - 5, reflection - enhancement layer - 6, mirror - film layer - 7, edge guard - 8, outer polyethylene - alcohol layer - 41, polyurethane layer - 42, nylon core - 43, chassis - 90, top cover - 91, first support roller - 92, second support roller - 93, driving main body - 94, conveying main body - 95, first glue - spraying head - 96, fiber - spreading mechanism - 97, second glue - spraying head - 98, pad frame - 951, frame base - 971, integral trough structure - 972, air cylinder - 973, first support block - 974, cutting roller - 975, positioning block - 976, second support block - 977, guide roller - 978, driving motor - 979, feeding hopper - 9710, cover base - 9721, first motor - 9722, screw rod - 9723, internally - threaded block - 9724, slider - 9725, rubber - scraping assembly - 9726, plate frame - 97261, rubber - scraping plate - 97262, second motor - 97263, grooving component - 97264, eccentric shaft rod - 972641, push rod - 972642, convex column piece - 972643, groove piece - 972644, positioning bolt - 972645, round piece - 9726411. Detailed implementation manners

[0033] In order to further explain the technical solution of the present invention, it will be elaborated in detail through specific embodiments below.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3, the present invention provides a laminated mirror cardboard, which includes a bottom base layer 1, a honeycomb board layer 2, a bottom glue layer 3, fiber filament segments 4, an upper glue layer 5, a reflection enhancement layer 6, a mirror film layer 7 and a protective edge 8. The upper surface of the inner part of the bottom base layer 1 is fixedly adhered with the honeycomb board layer 2 to increase the anti-bending property of the cardboard 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 interfacial bonding force between layers. The upper glue layer 5 is adhered to the top side of the bottom glue layer 3, and fiber filament segments 4 are distributed between the bottom glue layer 3 and the upper glue layer 5 to form a three-dimensional network support, improving the anti-tearing property. The fiber filament segments 4 are in a non-continuous and non-directional scattered distribution state, and the outer surface of the fiber filament segments 4 undergoes a melt interpenetration reaction with the bottom glue layer 3 and the upper glue layer 5, enhancing the interfacial bonding strength through the interpenetration of the fiber filament segments 4. The reflection enhancement layer 6 is fixedly adhered to the top side of the upper glue layer 5, and the mirror film layer 7 is fixedly adhered and covered on the top side of the reflection enhancement layer 6 to improve the mirror reflectivity through the reflection enhancement layer 6. The outer side of the mirror film layer 7 is wrapped with the protective edge 8, and both the reflection enhancement layer 6 and the mirror film layer 7 are arranged inside the protective edge 8. The bottom side of the protective edge 8 is adhered to the upper glue layer 5 to prevent delamination and cracking between layers. An anti-ultraviolet layer is arranged inside the top of the protective edge 8, and the anti-ultraviolet layer is coated above the mirror film layer 7 to prevent yellowing and aging. The reflection enhancement layer 6 is composed of a transparent resin with a refractive index of 1.5 - 1.8 and nano-titanium dioxide particles, and the mass ratio of nano-titanium dioxide is 5 - 15%, optimizing the balance between light scattering efficiency and light transmission uniformity. Inorganic microspheres are dispersedly arranged inside the upper glue layer 5, and the particle size of the inorganic microspheres is 0.1 - 0.5 μm, reducing the shrinkage deformation of the glue layer and improving the mirror flatness.

[0035] Among them, the particle size of nano-titanium dioxide in the reflection enhancement layer 6 is 20 - 50 nm, and its surface is modified by 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 - 10 μm, synergistically exerting the dual protection effects of physical shielding and chemical absorption of ultraviolet rays. The fiber filament segments 4 are of a three-layer coated structure, which are successively 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 stress, and the nylon core 43 provides a supporting role, forming a physical anchoring structure to enhance the bonding performance with the glue and disperse stress, improving the bending resistance of the cardboard.

[0036] Please refer to Figure 1 , Figure 2 and Figures 4 - 8 , the present invention provides a preparation method of the laminated mirror cardboard, which includes the following steps:

[0037] S1. Adhere and fix the honeycomb board layer 2 to the top side of the bottom base layer 1 through glue;

[0038] S2. Place the base layer 1 with the honeycomb panel layer 2 into the rubber coating equipment. Spray the bottom rubber layer 3, sprinkle the fiber filament segments 4, scrape and level the fiber filament segments 4 on the bottom rubber layer 3 and make intermittent grooves with a depth of 0.1 - 0.3 mm to enhance the mechanical bite force. Then spray the top rubber layer 5 above the bottom rubber layer 3 and the fiber filament segments 4 to encapsulate the fiber filament segments with a double-layer rubber layer, forming a three-dimensional reinforced structure.

[0039] S3. Fit and fix the mirror film layer 7 above the reflection enhancement layer 6. The reflection enhancement layer 6 and the mirror film layer 7 are optically matched to improve the reflectivity. Then place the reflection enhancement layer 6 and the mirror film layer 7 into the edge guard 8, and cover the anti-ultraviolet layer on the inner side of the top of the edge guard 8 so that the bottom side of the anti-ultraviolet layer is fixedly attached to the mirror film layer 7.

[0040] S4. Fit and fix the reflection enhancement layer 6 and the edge guard 8 above the top rubber layer 5 processed through the above steps, and cure them by hot pressing. The hot pressing temperature is 120 - 150 °C and the pressure is 0.5 - 1.5 MPa to ensure no bubbles between layers.

[0041] Among them, the rubber coating equipment includes a base frame 90. The top side of the base frame 90 is tightly fixed with a top cover 91. The first support roller 92 and the second support roller 93 are respectively arranged on the left and right sides of the top cover 91. The driving body 94 is installed on the left side inside the base frame 90. The output end of the top side of the driving body 94 is connected to the conveying body 95, and the conveying body 95 is arranged at the bottom side inside the top cover 91 to support and convey the base layer 1 and the honeycomb panel layer 2 through the conveying body 95. Above the conveying body 95, a first rubber spraying head 96, a fiber sprinkling mechanism 97 and a second rubber spraying head 98 are arranged in sequence from left to right. And the first rubber spraying head 96, the fiber sprinkling mechanism 97 and the second rubber spraying head 98 are all connected inside the top cover 91. Through three-station continuous operation, the production efficiency is improved. A cushion frame 951 is arranged 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 rubber spraying head 96 is used to spray and form the bottom rubber layer 3 above the honeycomb panel layer 2. The fiber sprinkling mechanism 97 has a fiber filament bundle passing through it to cut the fiber filaments into fiber filament segments 4 so that the cut fiber filament segments 4 fall above the bottom rubber layer 3. The second rubber spraying head 98 is used to spray and form the top rubber layer 5 so that the top rubber layer covers above the bottom rubber layer 3 and the fiber filament segments 4, forming a three-dimensional reinforced structure.

[0042] Among them, the fiber spreading mechanism 97 includes a frame base 971 fastened to the middle side inside the top cover 91. An integral groove structure 972 is installed at the lower middle side of the right part of the frame base 971, which links the glue scraping and the groove forming, improving the integration degree of the process. A cylinder 973 is installed at the top side of the right part of the frame base 971. There are two cylinders 973, which are respectively located on the front and rear sides of the frame base 971. The left output shafts of the two cylinders 973 are both connected with a first support block 974, and the two first support blocks 974 are respectively slidably connected to the front and rear sides inside the frame base 971. A cutting roller 975 is rotatably connected to the middle side inside the two first support blocks 974, so that the first support block 974 drives the cutting roller 975 to change its horizontal position through the cylinder 973. A positioning block 976 is installed at the upper left side inside the frame base 971, and there are two positioning blocks 976, which respectively correspond to the positions of the two first support blocks 974. A second support block 977 is fastened to the right side of each of the two positioning blocks 976. A guide roller 978 is rotatably connected to the middle side inside the two second support blocks 977, and the middle side of the rear part of the guide roller 978 is connected to the front output end of a driving motor 979. The driving motor 979 is fastened to the upper left side of the rear part of the frame base 971, so as to drive the guide roller 978 to rotate through the driving motor 979. When the cutting roller 975 is horizontally moved to contact the side part of the guide roller 978, the fiber filament bundle passes through the inside and then is cut into fiber segments 4 through the rotational cooperation of the cutting roller 975 and the guide roller 978. A feeding hopper 9710 is embedded in the lower middle side inside the frame base 971, and the feeding hopper 9710 is located below the cutting roller 975 and the guide roller 978, so that the fiber segments 4 fall through the feeding hopper 9710 and then fall onto the base glue layer 3.

[0043] Among them, the integral tank structure 972 includes a cover seat 9721 fastened to the left side of the frame seat 971, a first motor 9722 installed on the upper left side inside the cover seat 9721, a screw rod 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 rod 9723, a slider 9725 fixedly connected to the outside of the internal thread block 9724, and a rubber scraping assembly 9726 installed on the right side of the slider 9725. Taking the first motor 9722 as the power source, the slider 9725 drives the rubber scraping assembly 9726 to move longitudinally through the cooperation of the screw rod 9723 and the internal thread block 9724, so that the bottom of the rubber scraping assembly 9726 contacts and approaches above the base glue layer 3, realizing linkage rubber scraping and groove forming. The upper middle part on the left side of the rubber scraping assembly 9726 is in longitudinal sliding contact with the cover seat 9721 to ensure the stability of the longitudinal displacement of the rubber scraping assembly 9726. The rubber scraping assembly 9726 includes a plate frame 97261 fastened to the rear middle side of the slider 9725, a rubber scraper 97262 locked and fixed to the lower side of the front part of the plate frame 97261. The fiber filament section 4 is scraped flat on the base glue layer 3 through the contact between the bottom of the rubber scraper 97262 and the fiber filament section 4. A second motor 97263 fastened to the top side of the right part of the plate frame 97261 and a grooving member 97264 connected to the left output end of the second motor 97263. The grooving member 97264 is rotatably connected to the top side inside the plate frame 97261. Under the action of the second motor 97263, the bottom position of the grooving member 97264 makes a reciprocating motion in the longitudinal direction, so that the grooving member 97264 inserts into the base glue layer 3 to draw a groove after moving downward, and intermittent grooves are drawn through the reciprocating motion of the grooving member 97264 to enhance the mechanical bite force. The rear side of the grooving member 97264 is connected to the rubber scraper 97262 to ensure the displacement stability of the grooving member 97264.

[0044] Among them, the grooving component 97264 includes an eccentric shaft rod 972641 that rotates through the top side inside the plate frame 97261. One end of the eccentric shaft rod 972641 is connected to the second motor 97263. A push rod 972642 is wrapped and rotates outside the eccentric shaft rod 972641. Under the action of the second motor 97263, the eccentric shaft rod 972641 drives the push rod 972642 to perform a reciprocating longitudinal swinging action. A convex column piece 972643 is rotatably connected to the bottom end of the push rod 972642, a groove piece 972644 is fixedly connected to the middle side of the top of the convex column piece 972643, and a positioning bolt 972645 is arranged through the inside of the groove piece 972644. The push rod 972642 drives the convex column piece 972643 to move in the longitudinal direction under the cooperation and limiting action of the groove piece 972644 and the positioning bolt 972645, so as to draw a groove after the convex column piece 972643 is inserted into the bottom glue layer 3. One side of the positioning bolt 972645 is fastened to the scraping plate 97262. Two circular plates 9726411 are eccentrically arranged on the outer surface of the eccentric shaft rod 972641, and the two circular plates 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 circular plates 9726411 and the cooperation with the push rod 972642. There are two push rods 972642, two groove pieces 972644 and two positioning bolts 972645, and the two groove pieces 972644 are located inside 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 rubber coating equipment is as follows:

[0046] First, place the rubber coating equipment on the position above the honeycomb panel layer 2 that needs to be rubber coated through the bottom frame 90. Then pass the fiber filament bundle through the inside of the guide roller 978 and the cutting roller 975, control and start the air cylinder 973, so that the air cylinder 973 drives the first support block 974 and the cutting roller 975 to perform a transverse displacement action, so that the cutting roller 975 presses the fiber filament bundle against the side of the guide roller 978. Then connect the first glue spraying head 96 to the glue end of the bottom glue layer 3, connect the second glue spraying head 98 to the glue end of the top glue layer 5. Then, according to the required height position on the top side after the bottom glue layer 3 is sprayed, control and start the first motor 9722. The first motor 9722 drives the screw rod 9723 to rotate. Through the cooperation of the screw rod 9723 and the internal thread block 9724, the slider 9725 drives the glue scraping assembly 9726 to move in the longitudinal direction, so that the bottom of the scraping plate 97262 moves above the height position after the bottom glue layer 3 is sprayed;

[0047] Second, place the base layer 1 with the honeycomb board layer 2 onto the conveying main body 95 through the first supporting roller 92. Control the start of the driving main body 94 to drive the conveying main body 95 to drive the base layer 1 and the honeycomb board layer 2 to be conveyed in displacement. After moving below the first glue spraying head 96, the first glue spraying head 96 sprays glue to form a base glue layer 3 above the honeycomb board layer 2. After spraying the glue, move below the hopper 9710. With the start of the driving motor 979, the guide roller 978 and the cutting roller 975 perform rotational movements to guide and cut the fiber filament bundle passing through their inner sides. After the fiber filament bundle is cut, fiber filament segments 4 are formed, so that the fiber filament segments 4 fall onto the base glue layer 3 through the hopper 9710;

[0048] Third, after the fiber filament segments 4 are scattered, continue to move to the right. After the fiber filament segments 4 contact the scraper 97262, they are scraped flat above the base glue layer 3. Then, under the action of the second motor 97263, the eccentric shaft rod 972641 drives the push rod 972642 to perform a reciprocating longitudinal swinging action. The push rod 972642 drives the convex column piece 972643 to move longitudinally under the cooperative limiting action of the groove piece 972644 and the positioning bolt 972645. Thus, after the convex column piece 972643 is inserted into the base glue layer 3, a groove is drawn, and intermittent grooves are drawn on the base glue layer 3 through the reciprocating action of the convex column piece 972643;

[0049] Fourth, after the grooving treatment, move below the second glue spraying head 98. The second glue spraying head 98 sprays glue with inorganic microspheres above the base glue layer 3 and the fiber filament segments 4 to form an upper glue layer 5. Thus, a three-dimensional reinforced structure is formed through the cooperation of the upper glue layer 5, the base glue layer 3, and the fiber filament segments 4. After spraying the upper glue layer 5, it is removed from the treatment through the second supporting roller 93.

[0050] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A laminated mirror paperboard, characterized in that: The invention comprises a base layer (1), 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 non-continuous and non-directional scattered distribution state, and the outer surface of the fiber segments (4) undergoes a molten 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 an edge guard (8), and the reflection enhancement layer (6) and the mirror film layer (7) are both arranged on the inner side of the edge guard (8), the bottom side of the edge guard (8) is in contact with the upper adhesive layer (5), and the top inner side of the edge guard (8) is provided with an anti-ultraviolet layer, and the anti-ultraviolet layer is coated on 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 0.1-0.5 μm.

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 by blending polyvinylidene fluoride and a benzotriazole ultraviolet absorber, and has a thickness of 2-10 μm.

3. The laminated mirror paperboard according to claim 1, characterized in that: The fiber filament 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 surface cardboard 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 the 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 the base glue layer (3) and the fiber segments (4); S3, attaching and fixing the mirror film layer (7) on the top of 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 by hot pressing.

5. The method for preparing a laminated mirror surface cardboard according to claim 4, characterized in that: The glue coating device comprises 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 arranged on the left and right sides of the top cover (91), a driving body (94) is installed on the left side inside the base frame (90), the top side output end of the driving body (94) is connected to a conveying body (95), and the conveying body (95) is arranged 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 arranged in sequence from left to right above the conveying body (95), and the first glue spraying head (96), a fiber spreading mechanism (97) and a second glue spraying head (98) are arranged on the top side of the top cover (91), and the first glue spraying head (96), a fiber spreading mechanism (97) and a second glue spraying head (98) are arranged on the top side of the top cover (91), and the first glue spraying head (96) and the ... 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 cushion frame (951) is arranged 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 on the honeycomb plate layer (2) to form a bottom glue layer (3); a fiber bundle is passed through the fiber spreading mechanism (97) to cut the fiber bundles 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) comprises 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), a cylinder (973) is installed on the top side of the right part of the frame seat (971), two cylinders (973) are provided, and they 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 sides of the two first support blocks (974) are rotatably connected to the cutting rollers (975), and the upper left side of the frame seat (971) is connected to the cutting rollers (975). A positioning block (976) is installed on the side, and two positioning blocks (976) are provided, respectively corresponding to the positions of the two first support blocks (974); a second support block (977) is fastened to the right side of the two positioning blocks (976); a guide roller (978) is rotatably connected to the middle side of the two second support blocks (977); and the middle side of the rear part of the guide roller (978) is connected to the front output end of the driving motor (979); the driving motor (979) is fastened to the upper left side of the rear part 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 whole groove structure (972) comprises a cover seat (9721) fastened to the frame seat (971) on the left side, a first motor (9722) installed on the upper left side of the cover seat (9721), a screw rod (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 rod (9723), a slider (9725) fixedly connected to the outer side of the internal thread block (9724), and a scraper assembly (9726) installed 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 paperboard according to claim 7, characterized in that: The scraper assembly (9726) comprises a plate frame (97261) fastened to the slider (9725) at the middle side of the rear portion, a scraper (97262) locked and fixed to the lower side of the front portion of the plate frame (97261), a second motor (97263) fastened to the top side of the right portion of the plate frame (97261), and a groove component (97264) connected to the left output end of the second motor (97263), wherein the groove component (97264) is rotatably connected to the top side of the interior 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 paperboard 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 and rotated with a push rod (972642), 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 the laminated mirror paperboard according to claim 9, characterized in that: The outer surface of the eccentric shaft (972641) is eccentrically provided with two discs (9726411), and the two discs (9726411) are rotatably connected to the inside of a push rod (972642). Two push rods (972642), grooves (972644) and 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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