Environment-friendly PET plate

Abstract

The utility model relates to the field of PET board material, more particularly to an environmental protection PET board material, through setting up first clamping slot and second clamping slot on the board body, setting up first clamping strip on the first panel body, setting up second clamping strip on the second panel body, the board body is connected through first clamping slot and first clamping strip, is connected through second clamping slot and second clamping strip, and the board body can abut with the first panel body and the second panel body, so that the corresponding number of first panel body and second panel body can cover the board body, so that the required PET board material is obtained, when recycling the PET board material, because the first panel body and the second panel body adopt the mode of clamping, compared with the mode of sticking, the first panel body and the second panel body are more easily separated and disassembled with the board body respectively, thereby realizing the efficient and high-purity recovery of the first panel unit and the second panel unit.

Description

Technical Field

[0001] This utility model relates to the field of PET sheets, and more specifically, to an environmentally friendly PET sheet. Background Technology

[0002] PET, or polyethylene terephthalate, is a food-grade environmentally friendly material that is non-toxic, odorless, and free of heavy metals, formaldehyde, and other harmful substances, making it safe for human use. Therefore, PET is often used as a surface material for boards, such as wardrobes and dining cabinets. Currently, most PET boards are formed by bonding a PET surface layer to a wood-based substrate layer using heat pressing. When the product is discarded, because the PET surface layer and the wood-based substrate layer are firmly bonded, it is difficult to separate the PET plastic portion from the wood substrate, making it difficult to achieve efficient and high-purity recycling of PET boards. Utility Model Content

[0003] To address the problem of the difficulty in achieving efficient and high-purity recycling of existing PET sheets, this utility model provides an environmentally friendly PET sheet, comprising: The system comprises a board unit, a first panel unit, and a second panel unit. The board unit includes a board body, multiple first slots, and a second slot. The first slots are recessed inwards at both ends along the thickness direction of the board body. The second slots are recessed inwards along the circumferential direction of the board body. The first panel unit includes a first panel body and multiple first clips. One end of each first clip is fixedly connected to one end face of the first panel body along its thickness direction, and the other end is spaced apart from the first panel body. The second panel unit includes a second panel body and a second clip. One end of each second clip is fixedly connected to one end face of the second panel body along its thickness direction, and the other end is spaced apart from the second panel body. The board body's two ends along its thickness direction are respectively engaged with the corresponding first clips through the first slots. The two ends of the board body along its thickness direction abut against the end face of the first panel body near the first clip. The board body is engaged with the second clip through the second slot along its circumferential direction. The circumferential surface of the board body abuts against the end face of the second panel body near the second clip. The side surface of the first panel body abuts against the end face of the second panel body near the second clip.

[0004] In some embodiments, the projected shape of the first card slot along its length is similar to the projected shape of the first card strip along its length; the projected shape of the second card slot along its length is similar to the projected shape of the second card slot along its length; the projected shape of the first card strip along its length is the same as the projected shape of the second card strip along its length, wherein the projected shape of the first card strip along its length is larger than the projected shape of the first card slot along its length; and the projected shape of the second card strip along its length is larger than the projected shape of the second card slot along its length.

[0005] In some embodiments, the first latch includes a connecting portion and an engaging portion; one end of the connecting portion is fixedly connected to the first panel body, and the other end is fixedly connected to the engaging portion; the width of the engaging portion perpendicular to its length direction gradually decreases from the end near the first panel body to the end away from the first panel body; the width of the engaging portion perpendicular to its length direction near the panel body is greater than the width of the connecting portion perpendicular to its length direction; the width of the engaging portion perpendicular to its length direction away from the panel body is less than the width of the connecting portion perpendicular to its length direction.

[0006] In some embodiments, the first latch includes a connecting portion and an engaging portion; one end of the connecting portion is fixedly connected to the first panel body, and the other end is fixedly connected to the engaging portion; the width of the engaging portion perpendicular to its length direction gradually increases and then gradually decreases from the end near the first panel body to the end away from the first panel body; the width of the engaging portion perpendicular to its length direction near the panel body is greater than the width of the connecting portion perpendicular to its length direction; the width of the engaging portion perpendicular to its length direction away from the panel body is less than the width of the connecting portion perpendicular to its length direction.

[0007] In some embodiments, two adjacent first card slots are parallel to each other.

[0008] In some embodiments, the board body includes a main body, a plurality of first adhesive application portions, and a plurality of first adhesive collection grooves; the first adhesive collection grooves are respectively recessed inward along the end face of the main body in the thickness direction; the first adhesive application portion is located in the first adhesive collection groove; one end of the first adhesive application portion in the axial direction is fixedly connected to one end of the main body in the thickness direction, and the other end of the first adhesive application portion in the axial direction is flush with the end face of the main body in the thickness direction; the peripheral surface of the first adhesive application portion is spaced apart from the main body; the first slots are respectively recessed inward along both end faces of the main body in the thickness direction; the second slots are recessed inward along the circumference of the main body; the first slots and the second slots are respectively spaced apart from the first adhesive application portion and the first adhesive collection groove; the first panel body is bonded to the first adhesive application portion.

[0009] In some embodiments, the board body further includes a plurality of second adhesive application portions and a plurality of second adhesive collection grooves; the second adhesive collection grooves are respectively recessed from the circumferential surface of the main body along the radial direction of the main body; the second adhesive application portions are located in the second adhesive collection grooves; one end of the second adhesive application portion along its axial direction is fixedly connected to the circumferential surface of the main body, and the other end of the second adhesive application portion along its axial direction is flush with the circumferential surface of the main body; the circumferential surface of the second adhesive application portion is spaced apart from the main body; the second adhesive application portion is spaced apart from the first slot and the second slot; the second panel body is bonded to the second adhesive application portion.

[0010] In some embodiments, the side surface of the first panel body is bonded to the end face of the second panel body near the second card strip.

[0011] To address the problem of the difficulty in achieving efficient and high-purity recycling of existing PET sheets, this utility model has the following advantages: By setting a first slot and a second slot on the sheet body, the first panel unit and the second panel unit are made of PET material; a first locking strip is set on the first panel body, and a second locking strip is set on the second panel body; the sheet body is engaged with the first locking strip through the first slot and with the second locking strip through the second slot; and the sheet body can abut against the first panel body and the second panel body, so that a corresponding number of first panel bodies and second panel bodies can cover the sheet body, thereby obtaining the required PET sheet; when the PET sheet is recycled, since the first panel body and the second panel body are engaged by a locking method, it is easier to disassemble and separate the first panel body and the second panel body from the sheet body than by an adhesive method, thereby achieving efficient and high-purity recycling of the first panel unit and the second panel unit. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the planar structure of an environmentally friendly PET sheet. Figure 2 for Figure 1 Cross-sectional view along the AA direction; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a structural schematic diagram of a sheet metal unit; Figure 5 for Figure 4 A magnified view of a portion of point B in the middle; Figure 6 This is a schematic diagram of the planar structure of the plate unit in some embodiments; Figure 7 This is a schematic diagram of the planar structure of the plate unit in some embodiments; Figure 8 for Figure 7 A magnified view of a portion of point C in the middle; Figure 9 This is a schematic diagram of the structure of the first panel unit in some embodiments; Figure 10 for Figure 9 A magnified view of a portion of point D in the middle; Figure 11 This is a schematic diagram of the structure of the first panel unit in some embodiments; Figure 12 for Figure 11 A magnified view of a portion of point E in the middle.

[0013] In the diagram: 100 - Board unit; 110 - Board body; 111 - Main body; 112 - First glue application part; 113 - Second glue application part; 114 - First glue collection tank; 115 - Second glue collection tank; 120 - First slot; 130 - Second slot; 200 - First panel unit; 210 - First panel body; 220 - First locking strip; 221 - Connecting part; 222 - Engaging part; 300 - Second panel unit; 310 - Second panel body; 320 - Second locking strip. Detailed Implementation

[0014] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0015] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0016] This embodiment discloses an environmentally friendly PET sheet, such as Figures 1 to 12 As shown, it may include: The system comprises a board unit 100, a first panel unit 200, and a second panel unit 300. The board unit 100 includes a board body 110, a plurality of first slots 120, and a second slot 130. The first slots 120 are recessed inwards along both ends of the board body 110 in the thickness direction. The second slots 130 are recessed inwards along the circumferential direction of the board body 110. The first panel unit 200 includes a first panel body 210 and a plurality of first strips 220. One end of each first strip 220 is fixedly connected to one end of the first panel body 210 in the thickness direction, and the other end is spaced apart from the first panel body 210. The second panel unit 300 includes a second panel body 310 and a second strip 320. One end of each second strip 320 is fixedly connected to the first panel body 210 in the thickness direction. The second panel body 310 is fixedly connected to one end face along its thickness direction, and the other end is spaced apart from the second panel body 310; the two ends of the board body 110 along its thickness direction are respectively engaged with the corresponding first card strips 220 through the first card slots 120; the two ends of the board body 110 along its thickness direction abut against the end face of the first panel body 210 near the first card strips 220; the board body is engaged with the second card strips 320 through the second card slots 130 along its circumference; the circumferential surface of the board body 110 abuts against the end face of the second panel body 310 near the second card strips 320; the side surface of the first panel body 210 abuts against the end face of the second panel body 310 near the second card strips 320.

[0017] In this embodiment, by providing a first slot 120 and a second slot 130 on the sheet body 110, the first panel unit 200 and the second panel unit 300 are made of PET material; a first strip 220 is provided on the first panel body 210, and a second strip 320 is provided on the second panel body 310; the sheet body 110 is engaged with the first strip 220 through the first slot 120, and with the second strip 320 through the second slot 130; and the sheet body 110 can abut against the first panel body 210 and the second panel body 310, so that a corresponding number of first panel bodies 210 and second panel bodies 310 can cover the sheet body 110, thereby obtaining the desired PET sheet; when the PET sheet is recycled, since the first panel body 210 and the second panel body 310 are engaged by a snap-fit ​​method, compared to an adhesive method, This makes it easier to disassemble and separate the first panel body 210 and the second panel body 310 from the board body 110, thereby achieving efficient and high-purity recycling of the first panel unit 200 and the second panel unit 300. In this embodiment, the board body 110 is mainly made of wood, so that the board body 110 can maintain a good shape after the first slot 120 and the second slot 130 are provided on it. In this embodiment, the number of the first slot 120 and the second slot 130 can be set according to actual needs to meet actual requirements. In this embodiment, under normal circumstances, the board body 110 is formed by high-pressure processing of wood chips and adhesive. Those skilled in the art should realize that, through a specific mold, the board body 110 with the required first slot 120 and second slot 130 can be obtained under high pressure.

[0018] In some embodiments of this utility model, such as Figures 2 to 12 As shown, the projected shape of the first card slot 120 along its length direction is similar to the projected shape of the first card strip 220 along its length direction; the projected shape of the second card slot 130 along its length direction is similar to the projected shape of the second card slot 320 along its length direction; the projected shape of the first card strip 220 along its length direction is the same as the projected shape of the second card strip 320 along its length direction, wherein the projected shape of the first card strip 220 along its length direction is larger than the projected shape of the first card slot 120 along its length direction; the projected shape of the second card strip 320 along its length direction is larger than the projected shape of the second card slot 130 along its length direction.

[0019] In this embodiment, the projected shape of the first card slot 120 along its length is the same as the projected shape of the second card slot 130 along its length, and the projected shape of the first card strip 220 along its length is the same as the projected shape of the second card strip 320 along its length. The projected shape of the first card strip 220 along its length is similar to the projected shape of the first card slot 120 along its length, and the projected shape of the first card strip 220 along its length is larger than the projected shape of the first card slot 120 along its length. It can be imagined that since the first card strip 220 and the second card strip 320 are made of PET material, their bodies have a certain elasticity. When the first card strip 220... When the first locking strip 220 engages with the second locking slot 130, the first locking strip 220 is slightly larger, allowing it to engage well in the first locking slot 120. Similarly, the second locking strip 320 and the second locking slot 130 are also engaged in the same way. In this embodiment, the sizes of the first locking strip 220 and the second locking strip 320, as well as the sizes of the first locking slot 120 and the second locking slot 130, can be set according to actual needs to ensure that the first locking strip 220 and the first locking slot 120 are engaged firmly, the second locking strip 320 and the second locking slot 130 are engaged firmly, and that the first panel unit 200 and the second panel unit 300 can be easily removed from the plate body 110.

[0020] In some embodiments of this utility model, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 10 As shown, the first latching strip 220 includes a connecting portion 221 and an engaging portion 222; one end of the connecting portion 221 is fixedly connected to the first panel body 210, and the other end is fixedly connected to the engaging portion 222; the width of the engaging portion 222 perpendicular to its length direction gradually decreases from the end near the first panel body 210 to the end away from the first panel body 210; the width of the engaging portion 222 perpendicular to its length direction near the panel body is greater than the width of the connecting portion 221 perpendicular to its length direction; the width of the engaging portion 222 perpendicular to its length direction away from the panel body is less than the width of the connecting portion 221 perpendicular to its length direction.

[0021] In this embodiment, the shape of the first locking strip 220 allows the first panel unit 200 to be less likely to separate from the board body 110 when it is not subjected to external force or is subjected to a small amount of external force after the first locking strip 220 is engaged with the first locking slot 120. Similarly, the second locking strip 320 can also achieve the same effect after it is engaged with the second locking slot 130. It can also be imagined that the shape of the first locking strip 220 is conducive to engaging the first locking strip 220 into the first locking slot 120. For example, when it is necessary to assemble the first panel unit 200 with the board unit 100, the engaging part can be used to achieve the same effect. 222 corresponds to the opening of the first slot 120, and the first panel unit 200 is struck with a wooden mallet, so that the first clip 220 can be engaged with the first slot 120 in a relatively directional manner; when it is necessary to remove the first panel unit 200 from the board unit 100, it is only necessary to use external force to strike the side of the first panel unit 200 along the length direction of the first slot 120, so that the first clip 220 can slide in the first slot 120; finally, the first panel unit 200 is separated from the board unit 100; the same applies to the second panel unit 300.

[0022] In some embodiments of this utility model, such as Figure 7 , Figure 8 , Figure 11 , Figure 12 As shown; the first locking strip 220 includes a connecting portion 221 and an engaging portion 222; one end of the connecting portion 221 is fixedly connected to the first panel body 210, and the other end is fixedly connected to the engaging portion 222; the width of the engaging portion 222 perpendicular to its length direction gradually increases and then gradually decreases from the end near the first panel body 210 to the end away from the first panel body 210; the width of the engaging portion 222 perpendicular to its length direction near the panel body is greater than the width of the connecting portion 221 perpendicular to its length direction; the width of the engaging portion 222 perpendicular to its length direction away from the panel body is less than the width of the connecting portion 221 perpendicular to its length direction.

[0023] In this embodiment, by setting the first locking strip 220, the second locking strip 320, the first locking groove 120, and the second locking groove 130 in such a shape, it is easier to remove the first panel unit 200 and the second panel unit 300 from the board unit 100. It can be imagined that the width of the engaging part 222 perpendicular to its length direction gradually increases and then gradually decreases from the end near the first panel body 210 to the end away from the first panel body 210, so that the engaging part 222 has a certain slope. By applying a force perpendicular to the length direction of the first locking strip 220 to the first panel unit 200, the first locking strip 220 can be separated from the first locking groove 120 relatively easily; similarly, the second locking strip 320 and the second locking groove 130 are also like this.

[0024] In some embodiments of this utility model, such as Figure 4 , Figure 5 As shown; the two adjacent first card slots 120 are parallel to each other.

[0025] In some embodiments of this utility model, such as Figure 4 , Figure 5 As shown; the board body 110 includes a main body 111, a plurality of first glue-applying parts 112, and a plurality of first glue-collecting tanks 114; the first glue-collecting tanks 114 are respectively recessed inward along the end face of the main body 111 in the thickness direction; the first glue-applying parts 112 are located in the first glue-collecting tanks 114; one end of the first glue-applying part 112 in the axial direction is fixedly connected to one end of the main body 111 in the thickness direction, and the other end of the first glue-applying part 112 in the axial direction is connected to the main body 111. 1. The end face along its thickness direction is flush; the peripheral surface of the first adhesive part 112 is spaced apart from the main body part 111; the first slot 120 is recessed inward along both end faces of the main body part 111 in the thickness direction; the second slot 130 is recessed inward along the circumferential direction of the main body part 111; the first slot 120 and the second slot 130 are spaced apart from the first adhesive part 112 and the first adhesive collection tank 114, respectively; the first panel body 210 is bonded to the first adhesive part 112; The board body 110 further includes a plurality of second adhesive application portions 113 and a plurality of second adhesive collection grooves 115; the second adhesive collection grooves 115 are respectively recessed from the circumferential surface of the main body portion 111 along the radial direction of the main body portion 111; the second adhesive application portions 113 are located in the second adhesive collection grooves 115; one end of the second adhesive application portion 113 along its axial direction is fixedly connected to the circumferential surface of the main body portion 111, and the other end of the second adhesive application portion 113 along its axial direction is flush with the circumferential surface of the main body portion 111; the circumferential surface of the second adhesive application portion 113 is spaced apart from the main body portion 111; the second adhesive application portion 113 is spaced apart from the first slot 120 and the second slot 130; the second panel body 310 is bonded to the second adhesive application portion 113.

[0026] In this embodiment, to further prevent misalignment between the first panel unit 200 and the second panel unit 300 and the board unit 100 during use, the amount of adhesive can be appropriately increased to make the connection between the board unit 100 and the first panel unit 200 and the second panel unit 300 more secure. This is achieved by appropriately providing a first adhesive application portion 112 and a second adhesive application portion 113, and by applying a certain amount of weakly adhesive adhesive to the first adhesive application portion 112 and the second adhesive application portion 113, the connection between the board unit 100 and the first panel unit 200 and the second panel unit 300 can be further strengthened. The adhesive is strengthened, and by setting the first adhesive collection tank 114 and the second adhesive collection tank 115, excess adhesive on the first adhesive application part 112 and the second adhesive application part 113 can be directed into the first adhesive collection part and the second adhesive collection part respectively, avoiding excessive adhesive from flowing into the gap between the first panel unit 200 and the board unit 100 and the gap between the second panel unit 300 and the board unit 100; thereby, the bonding force between the first panel unit 200 and the second panel unit 300 and the board unit 100 can be better controlled, facilitating the disassembly of the first panel unit 200 and the second panel unit 300.

[0027] In some embodiments of this utility model, the side of the first panel body 210 is bonded to the end face of the second panel body 310 near the second card strip 320, and adjacent first panel bodies 210 can also be adaptively bonded as needed.

[0028] In this embodiment, the side of the first panel body 210 can be bonded to the end face of the second panel body 310 near the second card strip 320 as needed, so that the first panel body 210 and the second panel body 310 can cover the board body 110, resulting in better sealing of the PET board. However, it should be further explained that since the contact area between the side of the first panel body 210 and the end face of the second panel body 310 near the second card strip 320 is small, the adhesive force is also small after the side of the first panel body 210 and the end face of the second panel body 310 near the second card strip 320 are bonded. By selectively choosing adhesives, the sealing effect of the PET board can be satisfied while avoiding the influence of adhesive force on the disassembly of the first panel unit 200 and the second panel unit 300.

[0029] In the above embodiments, the separation methods of the first panel unit 200 and the second panel unit 300 from the board unit 100 are only schematic descriptions. The separation methods of the first panel unit 200 and the second panel unit 300 from the board unit 100 are not limited to the one described above. It can be imagined that in order to facilitate the quick removal of the first panel unit 200 and the second panel unit 300 from the board unit 100, a greater force can be applied by corresponding mechanical equipment. This force can be a knocking force or a pulling force, which can quickly separate the first panel unit 200 and the second panel unit 300 from the board unit 100 respectively.

[0030] The working principle of this utility model is as follows: When the first panel unit 200 and the second panel unit 300 need to be removed from the board unit 100, by applying a force to the second panel unit 300 along the length of the second slot 130, the second locking strip 320 can slide in the second slot 130, ultimately causing the second panel unit 300 to disengage from the board unit 100; by applying a predetermined force to the first panel unit 200 and the second panel unit 300 along the length of the first slot 120, the first locking strip 220 can slide in the first slot 120, ultimately causing the first panel unit 200 to disengage from the board unit 100; thereby achieving efficient and high-purity recycling of the first panel unit 200 and the second panel unit 300.

[0031] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this disclosure.

Claims

1. An environmentally friendly PET sheet, characterized in that, include: The system comprises a board unit, a first panel unit, and a second panel unit. The board unit includes a board body, multiple first slots, and a second slot. The first slots are recessed inwards at both ends along the thickness direction of the board body. The second slots are recessed inwards along the circumferential direction of the board body. The first panel unit includes a first panel body and multiple first clips. One end of each first clip is fixedly connected to one end face of the first panel body along its thickness direction, and the other end is spaced apart from the first panel body. The second panel unit includes a second panel body and a second clip. One end of each second clip is fixedly connected to one end face of the second panel body along its thickness direction, and the other end is spaced apart from the second panel body. The board body's two ends along its thickness direction are respectively engaged with the corresponding first clips through the first slots. The two ends of the board body along its thickness direction abut against the end face of the first panel body near the first clip. The board body is engaged with the second clip through the second slot along its circumferential direction. The circumferential surface of the board body abuts against the end face of the second panel body near the second clip. The side surface of the first panel body abuts against the end face of the second panel body near the second clip.

2. The environmentally friendly PET sheet according to claim 1, characterized in that, The projection shape of the first card slot along its length is similar to the projection shape of the first card strip along its length; the projection shape of the second card slot along its length is similar to the projection shape of the second card slot along its length; the projection of the first card strip along its length is the same as the projection of the second card strip along its length, wherein the projection shape of the first card strip along its length is larger than the projection shape of the first card slot along its length; the projection shape of the second card strip along its length is larger than the projection shape of the second card slot along its length.

3. The environmentally friendly PET sheet according to claim 2, characterized in that, The first locking strip includes a connecting portion and an engaging portion; one end of the connecting portion is fixedly connected to the first panel body, and the other end is fixedly connected to the engaging portion; the width of the engaging portion perpendicular to its length direction gradually decreases from the end near the first panel body to the end away from the first panel body; the width of the engaging portion perpendicular to its length direction near the panel body is greater than the width of the connecting portion perpendicular to its length direction; the width of the engaging portion perpendicular to its length direction away from the panel body is less than the width of the connecting portion perpendicular to its length direction.

4. The environmentally friendly PET sheet according to claim 2, characterized in that, The first locking strip includes a connecting portion and an engaging portion; one end of the connecting portion is fixedly connected to the first panel body, and the other end is fixedly connected to the engaging portion; the width of the engaging portion perpendicular to its length direction gradually increases and then gradually decreases from the end near the first panel body to the end away from the first panel body; the width of the engaging portion perpendicular to its length direction near the panel body is greater than the width of the connecting portion perpendicular to its length direction; the width of the engaging portion perpendicular to its length direction away from the panel body is less than the width of the connecting portion perpendicular to its length direction.

5. An environmentally friendly PET sheet according to claim 3 or 4, characterized in that, The two adjacent first card slots are parallel to each other.

6. The environmentally friendly PET sheet according to claim 5, characterized in that, The board body includes a main body, a plurality of first adhesive application parts, and a plurality of first adhesive collection grooves; the first adhesive collection grooves are respectively recessed inward along the end face of the main body in the thickness direction; the first adhesive application parts are located in the first adhesive collection grooves; one end of the first adhesive application part in the axial direction is fixedly connected to one end of the main body in the thickness direction, and the other end of the first adhesive application part in the axial direction is flush with the end face of the main body in the thickness direction; the circumferential surface of the first adhesive application part is spaced apart from the main body; the first slots are respectively recessed inward along both end faces of the main body in the thickness direction; the second slots are recessed inward along the circumferential direction of the main body; the first slots and the second slots are respectively spaced apart from the first adhesive application parts and the first adhesive collection grooves; the first panel body is bonded to the first adhesive application parts.

7. The environmentally friendly PET sheet according to claim 6, characterized in that, The board body further includes multiple second adhesive application sections and multiple second adhesive collection grooves; the second adhesive collection grooves are respectively recessed from the circumferential surface of the main body along the radial direction of the main body; the second adhesive application section is located in the second adhesive collection groove; one end of the second adhesive application section along its axial direction is fixedly connected to the circumferential surface of the main body, and the other end of the second adhesive application section along its axial direction is flush with the circumferential surface of the main body; the circumferential surface of the second adhesive application section is spaced apart from the main body; the second adhesive application section is spaced apart from the first slot and the second slot; the second panel body is bonded to the second adhesive application section.

8. The environmentally friendly PET sheet according to claim 1, characterized in that, The side of the first panel body is bonded to the end face of the second panel body near the second card strip.

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