Polyethylene glycol terephthalate heat-resistant plastic logistics tray and preparation process thereof

Abstract

The polyethylene glycol terephthalate heat-resistant plastic logistics tray comprises a tray body and nine foot columns arranged in a matrix mode, first lightening hole arrays are evenly formed in the top end of the tray body, and a supporting plate is integrally arranged on the upper portion between every two adjacent foot columns; a first lightening hole array is arranged at the top end of the tray, the first lightening hole array extends into the supporting plate, a connecting plate is integrally arranged on the lower portion between every two adjacent foot columns along the outer wall of the tray, and a second lightening hole array is arranged in the middle of each connecting plate. The supporting plates between the adjacent foot columns improve the bearing capacity, the connecting plates between the outer wall foot columns enhance the rigidity and impact resistance, and the second lightening hole arrays in the middles of the connecting plates achieve optimal balance of weight reduction and structural strength.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of logistics pallets, specifically polyethylene terephthalate heat-resistant plastic logistics pallets and their preparation process. Background Art

[0002] Polyethylene terephthalate heat-resistant plastic logistics, as a core component in modern logistics warehousing, works in conjunction with forklifts, shelves and other logistics equipment to provide efficient solutions for the storage, loading and handling of goods. It is not only an indispensable part of the logistics industry, but also widely praised for its environmental protection and durability. Compared with traditional wooden pallets, high-impact polystyrene pallets significantly reduce dependence on and damage to forest resources, actively responding to the call for environmental protection.

[0003] However, the structure of some polyethylene terephthalate heat-resistant plastic logistics on the market is mostly compression molded, and its structure consists of an external shell and an internal support frame, which leads to high production costs. At the same time, during the logistics transportation process, this may cause the goods to slip and be damaged, causing unnecessary losses to the company.

[0004] Invention patent content

[0005] The purpose of the present invention is to provide a polyethylene terephthalate heat-resistant plastic logistics pallet and a preparation process thereof to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the patent of the present invention provides the following technical solutions: a polyethylene terephthalate heat-resistant plastic logistics pallet, comprising a pallet and nine foot columns arranged in a matrix, a first weight-reducing hole array evenly arranged on the top of the pallet, a support plate integrally arranged at the upper part between two adjacent foot columns, the first weight-reducing hole array extending into the support plate, a connecting plate integrally arranged at the lower part between two adjacent foot columns along the outer wall of the pallet, and a second weight-reducing hole array arranged in the middle of the connecting plate.

[0007] Furthermore, two reinforcing rib units are cross-arranged on the first weight-reducing hole array, and the reinforcing rib unit is composed of two reinforcing ribs arranged in parallel.

[0008] Furthermore, two first weight-reducing groove arrays are symmetrically arranged at the bottom end of the connecting plate on both sides of the second weight-reducing hole array.

[0009] Furthermore, two U-shaped frames with openings facing downward are symmetrically and integrally provided at the lower part of the outer wall on each side of the foot column located in the middle, and the other end of the U-shaped frame is integrally provided with the outer wall of the corresponding side foot column.

[0010] Furthermore, a first reinforcing rib array is provided in the U-shaped frame, and the reinforcing ribs of the first reinforcing rib array are in a cross-shaped pattern.

[0011] Furthermore, a second reinforcement rib array is arranged between the two U-shaped frames located on the corresponding sides, and the two end portions of the second reinforcement rib array are integrally arranged with the outer wall of the foot column. The second reinforcement rib array is composed of two parallel reinforcement ribs, and a plurality of V-shaped reinforcement ribs are equidistantly spaced between the two reinforcement ribs and integrally arranged.

[0012] Furthermore, a reinforcing plate array is arranged inside the foot column, and the reinforcing plates of the reinforcing plate array are in a cross-shaped arrangement.

[0013] Furthermore, weight-reducing holes are evenly arranged on the inner wall of the reinforcement plate array.

[0014] Furthermore, the width of the support plate is less than the length of the side wall of the foot column, and a plurality of triangular brackets are evenly spaced and integrally arranged on the outer side wall of the support plate, and the top end of the triangular bracket is integrally arranged with the bottom end of the tray.

[0015] The preparation process of the polyethylene terephthalate heat-resistant plastic logistics pallet implemented by the emergency lane autonomous logistics pallet production system includes the following steps:

[0016] S1: Mixing raw materials and additives by a mixer to form a mixture;

[0017] The raw materials include terephthalic acid and ethylene glycol in a ratio of 1:1;

[0018] The additives include 1-3 parts of flame retardant, 0.1-0.3 parts of dispersant, 1-2 parts of antioxidant, 1-3 parts of glass fiber and 3-7 parts of SBS toughening agent;

[0019] S2: performing an esterification reaction in an esterification reactor to produce diethylene glycol terephthalate;

[0020] 0.03%-0.05% of acetate is added to the total amount of the mixture during the esterification reaction to promote the esterification reaction;

[0021] The temperature of the esterification reaction is controlled between 200°C and 290°C;

[0022] The pressure of the esterification reaction is controlled between 0.1MPa-0.5MPa;

[0023] S3: performing polycondensation reaction by means of a polycondensation reactor;

[0024] Diethylene terephthalate further undergoes polycondensation reaction in the polycondensation reactor to form high molecular weight polyethylene terephthalate;

[0025] S4: granulation by a granulating agent;

[0026] The PET melt obtained after the polycondensation reaction is transported to the pelletizer through the melt conveying system for pelletizing;

[0027] S5: Compression molding;

[0028] The PET granules are made into logistics pallets through injection molding machines or other molding equipment.

[0029] The beneficial effects achieved by the patent of the present invention are as follows: the first weight-reducing hole array evenly arranged on the top of the pallet not only effectively reduces the overall weight of the pallet, but also maintains the stability of the structure; the support plate integrally arranged at the upper part between adjacent foot columns enhances the carrying capacity and stability of the pallet; the connecting plate integrally arranged at the lower part between adjacent foot columns along the outer wall of the pallet significantly improves the overall rigidity and impact resistance of the pallet; the second weight-reducing hole array arranged in the middle of the connecting plate not only reduces the weight of the pallet, but also optimizes the structural strength through reasonable layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the polyethylene terephthalate heat-resistant plastic logistics pallet in Example 1;

[0031] Figure 2 A bottom view of the polyethylene terephthalate heat-resistant plastic logistics tray in Example 1;

[0032] Figure 3 is a schematic structural diagram of the reinforcement plate array in the first embodiment;

[0033] Figure 4 This is a flow chart of the process for preparing the polyethylene terephthalate heat-resistant plastic logistics pallet in Example 2. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] like Figure 1-2As shown, the patent of the present invention discloses a polyethylene terephthalate heat-resistant plastic logistics pallet, comprising: a pallet 1 and nine foot columns 2 arranged in a matrix, a first weight-reducing hole array 11 is evenly arranged on the top of the pallet, the arrangement of the first weight-reducing hole array 11 not only effectively reduces the overall weight of the pallet, but also maintains the stability of the structure, a support plate 3 for enhancing the bearing capacity and stability of the pallet is integrally arranged at the upper portion between two adjacent foot columns 2, the first weight-reducing hole array 11 extends into the support plate 3, further reducing the weight, and realizing a perfect combination of support and weight reduction, a connecting plate 4 for improving the overall rigidity and impact resistance of the pallet is integrally arranged at the lower portion between two adjacent foot columns 2 along the outer wall of the pallet 1, and a second weight-reducing hole array 41 is arranged in the middle portion of the connecting plate 4 for reducing the weight of the pallet and optimizing the structural strength through a reasonable layout.

[0037] Further, such as Figure 1 As shown, two reinforcing rib units are cross-arranged on the first weight-reducing hole array 11. The reinforcing rib unit is composed of two parallel reinforcing ribs 12. The reinforcing ribs 12 can effectively disperse and transfer the load, so that the pallet can better maintain its shape and stability when bearing weight, and prevent deformation or cracking.

[0038] Further, such as Figure 1-2 As shown, in order to further reduce the weight of the pallet and optimize the structural strength while reducing the weight, two first weight reducing groove arrays 42 are symmetrically arranged at the bottom end of the connecting plate 4 located on both sides of the second weight reducing hole array 41.

[0039] Further, such as Figure 1-2 As shown, in order to increase the connectivity between the middle foot column and the symmetrical side foot columns and to increase the structural strength of the bottom of the pallet, two U-shaped frames 5 with downward openings are symmetrically and integrally provided at the lower portion of the outer wall on each side of the middle foot column 2, and the other end of the U-shaped frame 5 is integrally provided with the outer wall of the corresponding side foot column 2.

[0040] Further, such as Figure 2 As shown, in order to increase the structural emphasis of the U-shaped frame, a first reinforcing rib array 51 is provided in the U-shaped frame 5 , and the reinforcing ribs of the first reinforcing rib array 51 are in a cross-shaped shape.

[0041] Further, such as Figure 2 As shown, in order to increase the connectivity between the middle foot column and the symmetrical side foot column and increase the structural strength of the bottom of the pallet, a second reinforcing rib array 52 is provided between the two U-shaped frames 5 located on the corresponding sides, and the two end portions of the second reinforcing rib array 52 are integrally provided with the outer wall of the foot column 2. The second reinforcing rib array 52 is composed of two parallel reinforcing ribs, and the two reinforcing ribs are equidistant and integrally provided with a plurality of V-shaped reinforcing ribs.

[0042] Further, such as Figure 2 As shown, in order to increase the structural strength of the inner wall of the foot column, a reinforcing plate array 21 is provided inside the foot column 2, and the reinforcing plates of the reinforcing plate array 21 are in a vertical and horizontal cross shape.

[0043] Further, such as Figure 3 As shown, in order to increase the structural strength inside the foot column and reduce the weight of the foot column, weight-reducing holes 22 are evenly arranged on the inner wall of the reinforcing plate array 21 .

[0044] Further, such as Figure 1 As shown, the width of the support plate 3 is less than the length of the side wall of the foot column 2 , and a plurality of triangular brackets 31 are evenly spaced and integrally arranged on the outer side wall of the support plate 3 , and the top end of the triangular bracket 31 is integrally arranged with the bottom end of the tray 1 .

[0045] Embodiment 2

[0046] See also Figure 4 The preparation process of polyethylene terephthalate heat-resistant plastic logistics pallet implemented by the emergency lane autonomous logistics pallet production system includes the following steps:

[0047] S1: Mixing raw materials and additives by a mixer to form a mixture;

[0048] The raw materials include terephthalic acid and ethylene glycol in a ratio of 1:1;

[0049] The additives include 1-3 parts of flame retardant, 0.1-0.3 parts of dispersant, 1-2 parts of antioxidant, 1-3 parts of glass fiber and 3-7 parts of SBS toughening agent;

[0050] S2: performing an esterification reaction in an esterification reactor to produce diethylene glycol terephthalate;

[0051] 0.03%-0.05% of acetate is added to the total amount of the mixture during the esterification reaction to promote the esterification reaction;

[0052] The temperature of the esterification reaction is controlled between 200°C and 290°C;

[0053] The pressure of the esterification reaction is controlled between 0.1MPa-0.5MPa;

[0054] S3: performing polycondensation reaction by means of a polycondensation reactor;

[0055] Diethylene terephthalate further undergoes polycondensation reaction in the polycondensation reactor to form high molecular weight polyethylene terephthalate;

[0056] S4: granulation by a granulating agent;

[0057] The PET melt obtained after the polycondensation reaction is transported to the pelletizer through the melt conveying system for pelletizing;

[0058] S5: Compression molding;

[0059] The PET granules are made into logistics pallets through injection molding machines or other molding equipment.

[0060] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and invention concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Polyethylene terephthalate heat-resistant plastic logistics pallet, characterized in that: The invention comprises a tray (1) and nine foot poles (2) arranged in a matrix, wherein a first weight-reducing hole array (11) is evenly arranged on the top of the tray, a support plate (3) is integrally arranged at the upper part between two adjacent foot poles (2), the first weight-reducing hole array (11) extends into the support plate (3), a connecting plate (4) is integrally arranged at the lower part between two adjacent foot poles (2) along the outer wall of the tray (1), and a second weight-reducing hole array (41) is arranged in the middle of the connecting plate (4).

2. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 1, characterized in that: Two reinforcing rib units are cross-arranged on the first weight-reducing hole array (11), and the reinforcing rib unit is composed of two reinforcing ribs (12) arranged in parallel.

3. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 1, characterized in that: Two first weight-reducing groove arrays (42) are symmetrically arranged at the bottom end of the connecting plate (4) located on both sides of the second weight-reducing hole array (41).

4. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 1, characterized in that: The lower part of the outer wall on each side of the foot column (2) located in the middle is symmetrically and integrally provided with two U-shaped frames (5) with openings facing downward, and the other end of the U-shaped frame (5) is integrally provided with the outer wall of the corresponding side foot column (2).

5. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 4, characterized in that: A first reinforcing rib array (51) is arranged in the U-shaped frame (5), and the reinforcing ribs of the first reinforcing rib array (51) are arranged in a vertical and horizontal manner.

6. The polyethylene terephthalate heat-resistant plastic logistics pallet according to any one of claims 4 and 5, characterized in that: A second reinforcing rib array (52) is arranged between the two U-shaped frames (5) located on the corresponding sides, and the two end portions of the second reinforcing rib array (52) are integrally arranged with the outer wall of the foot column (2). The second reinforcing rib array (52) is composed of two reinforcing ribs arranged in parallel, and a plurality of V-shaped reinforcing ribs are equidistantly spaced between the two reinforcing ribs and integrally arranged.

7. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 6, characterized in that: A reinforcing plate array (21) is arranged inside the foot column (2), and the reinforcing plates of the reinforcing plate array (21) are arranged in a vertical and horizontal manner.

8. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 7, characterized in that: The inner wall of the reinforcement plate array (21) is evenly provided with weight-reducing holes (22).

9. The polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 8, characterized in that: The width of the support plate (3) is less than the length of the side wall of the foot column (2); a plurality of triangular brackets (31) are evenly spaced and integrally arranged on the outer side wall of the support plate (3); the top end of the triangular bracket (31) is integrally arranged with the bottom end of the tray (1).

10. The preparation process of the polyethylene terephthalate heat-resistant plastic logistics pallet according to claim 9 is characterized in that: The steps include: S1: Mixing raw materials and additives by a mixer to form a mixture; The raw materials include terephthalic acid and ethylene glycol in a ratio of 1:1; The additives include 1-3 parts of flame retardant, 0.1-0.3 parts of dispersant, 1-2 parts of antioxidant, 1-3 parts of glass fiber and 3-7 parts of SBS toughening agent; S2: performing an esterification reaction in an esterification reactor to produce diethylene glycol terephthalate; In the esterification reaction, 0.03% to 0.05% of the total amount of the mixture is added with acetate to promote the esterification reaction; The temperature of the esterification reaction is controlled between 200°C and 290°C; The pressure of the esterification reaction is controlled between 0.1MPa and 0.5MPa; S3: performing polycondensation reaction by means of a polycondensation reactor; The diethylene glycol terephthalate further undergoes a polycondensation reaction in a polycondensation reactor to form high molecular weight polyethylene terephthalate; S4: granulation by a granulating agent; The PET melt obtained after the polycondensation reaction is transported to the pelletizer through the melt conveying system for pelletizing; S5: Compression molding; The PET granules are made into logistics pallets through injection molding machines or other molding equipment.

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