Degradable plastic uptake tray and preparation method thereof

Abstract

The application discloses a degradable plastic suction tray, which comprises a degradable disc body and a convex piece. The degradable disc body is made of light-degradable plastic material. At least one groove is arranged on the degradable disc body. A plurality of arrayed convex pieces are arranged on the bottom surface of the groove. The convex piece comprises a converging lens. The top surface of the converging lens is a convex arc surface. A plurality of circumferentially arranged supporting rods are arranged below the converging lens. The supporting rods are bonded to the bottom surface of the groove. The application further discloses a preparation method of the degradable plastic suction tray. Compared with the prior art, the application effectively improves the degradation speed of the plastic suction tray.

Description

Technical Field

[0001] This invention relates to the field of biodegradable plastic products technology, and in particular to a biodegradable blister tray and its preparation method. Background Technology

[0002] To improve the environmental friendliness of plastic packaging products, biodegradable materials are often used to prepare plastic packaging boxes. For example, Chinese patent CN1 16144151A discloses a biodegradable blister box and its preparation method, which includes the following raw materials: polylactic acid, inorganic filler, antioxidant, chain extender, and hydrolysis resistant agent. The inorganic filler includes the following raw materials: glass fiber, diatomaceous earth, and cross-linked microporous starch. The preparation method is as follows: the raw materials are added to a rubber mixing machine for mixing to obtain a mixture. The mixture is extruded to obtain a sheet. The sheet is heated at high temperature and then formed by vacuum suction. After cooling, it is cut to obtain a biodegradable blister box. The prepared blister box has excellent biodegradability, good heat resistance, and high mechanical strength. It does not easily soften when holding hot soup or hot drinks and is not easily deformed during transportation.

[0003] In existing plastic products made from photodegradable polymers, the degradation rate is greatly affected by light. Low light intensity results in a slow degradation rate, and the degradation rate cannot be guaranteed. Summary of the Invention

[0004] The purpose of this invention is to provide a biodegradable blister tray and its preparation method, which effectively improves the degradation rate of the blister tray.

[0005] To achieve the above objectives, in one aspect, this aspect provides a biodegradable blister tray, comprising: a biodegradable tray body and protrusions, wherein the biodegradable tray body is made of photodegradable plastic material, at least one groove is provided on the biodegradable tray body, and a plurality of protrusions arranged in an array are provided on the bottom surface of the groove, the protrusions including a converging lens, the top surface of the converging lens being a convex arc surface, and a plurality of circumferentially arranged support rods are provided below the converging lens, the support rods being adhered to the bottom surface of the groove.

[0006] As a further description of the above technical solution:

[0007] The disc body comprises the following components by weight percentage: PET 45-55%; PBS 25-40%; starch 6-20%; photodegradable agent 2-4%; heat stabilizer 2-4%; lubricant 1-3%.

[0008] As a further description of the above technical solution:

[0009] The disc body comprises the following components by weight percentage: PET 48%; PBS 36%; starch 10%; photodegradable agent 2.5%; heat stabilizer 2%; lubricant 1.5%.

[0010] As a further description of the above technical solution:

[0011] The photodegrading agent is nano-titanium dioxide.

[0012] As a further description of the above technical solution:

[0013] The heat stabilizer is one or more of calcium stearate, zinc stearate, and calcium ricinoleate.

[0014] As a further description of the above technical solution:

[0015] The support rods are arranged at an angle.

[0016] As a further description of the above technical solution:

[0017] The converging lens includes a housing and a transparent filling liquid. The housing includes two arc-shaped plastic sheets, which are transparent and biodegradable. The two arc-shaped plastic sheets are joined together to form the housing. A cavity for containing the transparent filling liquid is formed inside the housing. An injection hole is provided on the housing for injecting the transparent filling liquid into the cavity.

[0018] As a further description of the above technical solution:

[0019] The transparent filling liquid is distilled water.

[0020] On the other hand, this invention also provides a method for preparing a biodegradable blister tray, comprising the following steps:

[0021] S1. Raw material pretreatment: Weigh PET, PBS, starch, photodegradable agent, heat stabilizer and lubricant, mix well and dry;

[0022] S2. Sheet preparation: The pre-treated raw material is fed into a sheet extruder, heated and extruded through the sheet extruder, calendered, cooled and shaped, and then rolled into a sheet.

[0023] S3. Vacuum forming: The sheet material is fed into the vacuum forming machine, heated to a molten state, and then enters the vacuum forming mold area for vacuum forming. After cooling and shaping, it is demolded to obtain a biodegradable disc.

[0024] S4. Finished product preparation: Several protrusions are glued to the bottom surface of the groove of the biodegradable tray to obtain a biodegradable blister tray.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In this invention, when the tray is used, the product is placed in the groove of the biodegradable tray. The protrusion at the bottom of the groove allows the bottom of the product to contact the protruding arc surface at the top of the converging lens, reducing the contact area between the bottom of the product and the tray and reducing the risk of scratches on the bottom of the product.

[0027] 2. In this invention, the converging lens inside the biodegradable disc can focus light and illuminate the bottom surface of the groove when the tray is discarded, which greatly increases the oxidation and degradation speed of the biodegradable disc and improves the degradation speed of the tray.

[0028] 3. In this invention, the biodegradable disc is made of photodegradable plastic material. The PBS (polybutylene succinate) material mixed in the components of the biodegradable disc has good degradability and a short degradation cycle. Combined with the photodegrading agent in the components, the biodegradable disc can be rapidly oxidized and degraded under photocatalysis, thereby improving the degradation efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a side view structural diagram of a biodegradable blister tray.

[0031] Figure 2 This is a schematic diagram of the structure of a biodegradable blister tray.

[0032] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0033] Figure 4 This is a schematic diagram of the support frame in a biodegradable blister tray.

[0034] Legend:

[0035] 1. Biodegradable disc; 11. Groove; 2. Protrusion; 21. Converging lens; 211. Housing; 2111. Curved plastic sheet; 2112. Injection hole; 212. Transparent filling liquid; 22. Support rod. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Please see Figure 1-4This invention provides a technical solution: In one aspect, this aspect provides a biodegradable blister tray, comprising: a biodegradable tray body 1 and protrusions 2. The biodegradable tray body 1 is made of photodegradable plastic material, and the tray body 1 comprises the following components by weight percentage: PET 45-55%; PBS 25-40%; starch 6-20%; photodegrading agent 2-4%; heat stabilizer 2-4%; lubricant 1-3%, specifically polyethylene wax, nano titanium dioxide, and one or more of calcium stearate, zinc stearate, and calcium ricinoleate as heat stabilizer. The biodegradable tray body 1 is provided with at least one groove 11, and a plurality of arrayed protrusions 2 are provided on the bottom surface of the groove 11. The protrusions 2 include a converging lens 21, the top surface of the converging lens 21 is a convex arc surface, and a plurality of circumferentially arranged support rods 22 are provided below the converging lens 21, the support rods 22 being adhered to the bottom surface of the groove 11.

[0042] The optimal ratio for the best degradation effect of the disc body 1 includes the following components by weight percentage: PET 48%; PBS 36%; starch 10%; photodegradant 2.5%; heat stabilizer 2%; lubricant 1.5%.

[0043] The support rod 22 is arranged at an angle to effectively support the converging lens 21, so that the converging lens 21 can effectively support the product in the groove 11.

[0044] The converging lens 21 includes a housing 211 and a transparent filling liquid 212. The housing 211 includes two arc-shaped plastic sheets 2111, which are transparent and biodegradable. The two arc-shaped plastic sheets 2111 are joined together to form the housing 211. A cavity for containing the transparent filling liquid 212 is formed inside the housing 211. An injection hole 2112 is provided on the housing 211 for injecting the transparent filling liquid 212 into the cavity, and the injection hole 2112 is sealed after the transparent filling liquid 212 is injected. The converging lens 21 is composed of two arc-shaped plastic sheets 2111 and the transparent filling liquid 212 filling them. The transparent biodegradable plastic sheets facilitate the passage of light, and the transparent filling liquid 212 can be distilled water. This forms a "biconvex lens" that effectively converges light, improves the degradation speed of the biodegradable disk 1, and can also degrade itself.

[0045] On the other hand, this invention also provides a method for preparing a biodegradable blister tray, comprising the following steps:

[0046] S1. Raw material pretreatment: Weigh PET, PBS, starch, photodegradable agent, heat stabilizer, and lubricant, mix well, and dry. The specific proportions of each component are: PET 48%; PBS 36%; starch 10%; photodegradable agent 2.5%; heat stabilizer 2%; lubricant 1.5%.

[0047] S2. Sheet preparation: The pre-treated raw material is fed into a sheet extruder, heated and extruded through the sheet extruder, calendered, cooled and shaped, and then rolled into a sheet.

[0048] S3. Vacuum forming: The sheet material is fed into the vacuum forming machine, heated to a molten state, and then enters the vacuum forming mold area for vacuum forming. After cooling and shaping, it is demolded to obtain the biodegradable disc 1.

[0049] S4. Finished product preparation: Several protrusions 2 are glued to the bottom surface of the groove 11 of the biodegradable tray body 1 to obtain a biodegradable blister tray.

[0050] Working principle: When using the tray, the product is placed in the groove 11 of the biodegradable tray body 1. The protrusion 2 at the bottom of the groove 11 ensures that the bottom of the product contacts the convex arc surface at the top of the converging lens 21, reducing the contact area between the bottom of the product and the tray and lowering the risk of scratches on the bottom of the product. Furthermore, when the tray is not in use, the converging lens 21 inside the biodegradable tray body 1 can focus light onto the bottom surface of the groove 11, greatly increasing the oxidation and degradation rate of the biodegradable tray body 1 and thus accelerating the degradation process.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A biodegradable blister tray, characterized in that, include: A biodegradable disc (1) and protrusions (2) are provided. The biodegradable disc (1) is made of photodegradable plastic material. At least one groove (11) is provided on the biodegradable disc (1). The groove (11) is used to place the product. Several protrusions (2) are arranged in an array on the bottom surface of the groove (11). The protrusions (2) include a converging lens (21). The top surface of the converging lens (21) is a convex arc surface. Several support rods (22) are arranged circumferentially below the converging lens (21). The support rods (22) are bonded to the bottom surface of the groove (11). The biodegradable disc body (1) comprises the following components by weight percentage: PET 45-55%; PBS 25-40%; starch 6-20%; photodegradant 2-4%; heat stabilizer 2-4%; lubricant 1-3%; The converging lens (21) includes a housing (211) and a transparent filling liquid (212). The housing (211) includes two arc-shaped plastic sheets (2111), which are transparent and biodegradable plastic sheets. The two arc-shaped plastic sheets (2111) are joined together to form the housing (211). A cavity for receiving the transparent filling liquid (212) is formed inside the housing (211). An injection hole (2112) is provided on the housing (211) for injecting the transparent filling liquid (212) into the cavity. The transparent filling liquid (212) is distilled water.

2. The biodegradable blister tray according to claim 1, characterized in that, The biodegradable disc (1) comprises the following components by weight percentage: PET 48%; PBS 36%; starch 10%; photodegradant 2.5%; heat stabilizer 2%; lubricant 1.5%.

3. The biodegradable blister tray according to claim 1, characterized in that, The photodegrading agent is nano-titanium dioxide.

4. The biodegradable blister tray according to claim 1, characterized in that, The heat stabilizer is one or more of calcium stearate, zinc stearate, and calcium ricinoleate.

5. A biodegradable blister tray according to claim 1, characterized in that, The support rod (22) is arranged at an angle.

6. A method for preparing a biodegradable blister tray as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Raw material pretreatment: Weigh PET, PBS, starch, photodegradable agent, heat stabilizer and lubricant, mix well and dry; S2. Sheet preparation: The pre-treated raw material is fed into a sheet extruder, heated and extruded through the sheet extruder, calendered, cooled and shaped, and then rolled into a sheet. S3, Vacuum forming: The sheet is fed into the vacuum forming machine, heated to a molten state and then entered into the vacuum forming mold area for vacuum forming. After cooling and shaping, it is demolded to obtain a biodegradable disc (1). S4. Finished product preparation: Several protrusions (2) are glued to the bottom surface of the groove (11) of the biodegradable tray body (1) to obtain a biodegradable blister tray.

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