A special anti-deformation material and box structure for pallets

Abstract

The present invention relates to a special anti-deformation material and box structure for pallets, and belongs to the technical field of transport box structures. The box structure includes a base, a cover plate, two first side plates, two second side plates and a plurality of pull rods. The bottoms of the two first side plates are clamped on the base, the bottoms of the two second side plates are clamped on the base, and the two first side plates and the two second side plates are clamped together to form a circular structure through the side ends. A plurality of the pull rods are clamped in an array between the tops of the two first side plates. The two first side plates are provided with a latch assembly, and the bottom of the cover plate is clamped on the tops of the two first side plates and the two second side plates. By ensuring the firmness of the box structure while adopting a wave structure for lightweight design, and the various components are all detachable, which is convenient for transportation and installation, the box structure as a whole has good load-bearing capacity, is stable and has good buffering performance.

Description

Technical Field

[0001] The invention belongs to the technical field of transport box structures and relates to a special anti-deformation material for a pallet and a box structure. Background Art

[0002] Shipping is a key mode of modern logistics, often used in coastal cities or countries. Due to the long distances and slow speeds of ocean freight, materials on board are susceptible to the effects of long shipping cycles and harsh weather. Therefore, materials typically require protection in shipping containers. During transportation, cushioning structures and materials are installed to protect materials from vibrations.

[0003] Polyurethane foam sheets, produced by mechanical foaming, are commonly used in the market as cushioning materials for thin objects. Because the raw material foams before coating, these sheets facilitate thickness control, making them a practical choice for polyurethane cushioning products. However, when large amounts of plasticizers, fillers, or crosslinking agents are added to the foam during its production, these materials can ooze out of the sheet, causing it to harden and reduce its cushioning properties. Summary of the Invention

[0004] The object of the present invention is to provide a special anti-deformation material and box structure for pallets. The present invention modifies castor oil to contain multiple hydroxyl groups. During the polyurethane synthesis process, when the modified castor oil participates in the reaction and forms a composite material, not only can good physical effects be formed between the various components, but also covalent bonds are formed. By controlling the degree of cross-linking and hybrid structure of the polyurethane, the polyurethane has a good dense structure, thereby improving the cushioning performance and service life of the polyurethane material.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A box structure of anti-deformation material specially used for pallets, the box structure comprising a base, a cover, two first side panels, two second side panels and a plurality of pull rods, the bottoms of the two first side panels being clamped on the base, the bottoms of the two second side panels being clamped on the base, and the two first side panels and the two second side panels being clamped together by the side ends to form a circular structure, a plurality of the pull rods being clamped in an array between the tops of the two first side panels, the two first side panels being provided with a latch assembly, and the bottom of the cover being clamped on the tops of the two first side panels and the two second side panels.

[0007] As a preferred technical solution of the present invention, the base is provided with two first card slots with a symmetrical structure and two second card slot assemblies with a symmetrical structure, the two second card slot assemblies include a plurality of second card slots, the bottom of the first side panel is engaged with the first card slot, the bottom of the second side panel is engaged with the second card slot, both side ends of the two first side panels are provided with a first U-shaped square passage, and both side ends of the two second side panels are provided with a second U-shaped square passage, the openings of the first U-shaped square passage and the second U-shaped square passage are both facing the base, and the first U-shaped square passage and the second U-shaped square passage are engaged with each other;

[0008] Both ends of the plurality of pull rods are provided with U-shaped blocks, and the U-shaped blocks are engaged with the top of the first side plate;

[0009] A third slot is provided on the periphery of the bottom of the cover plate, the opening of the third slot faces the first side plate and the second side plate, and the third slot is engaged with the top of the first side plate and the second side plate.

[0010] As a preferred technical solution of the present invention, the number of the latch assemblies is several, and the several latch assemblies include a guide support provided on the first side panel, a handle body movably fitted on the through hole of the guide support, and a limit block provided on the first side panel, and the limit block matches the handle body.

[0011] As a preferred technical solution of the present invention, connecting parts are provided on the four corners of the cover plate, and the connecting parts include a vertical portion and a guide portion extending outward along the top end of the vertical portion. The upper portion of the vertical portion extends out of the upper end surface of the cover plate, and the lower portion of the vertical portion extends out of the bottom end surface of the cover plate, and the inner wall surface of the lower portion of the vertical portion is in contact with the first side panel and the second side panel.

[0012] As a preferred technical solution of the present invention, the base, the two first side panels and the two second side panels are detachably connected, the cover plate, the two first side panels and the two second side panels are detachably connected, and the two first side panels and the plurality of pull rods are detachably connected.

[0013] As a preferred technical solution of the present invention, the base includes a plurality of rectangular square tubes arranged in an array and a plurality of tubes arranged in an array, the plurality of tubes are respectively arranged at the top and bottom of the plurality of rectangular square tubes and the plurality of tubes and the plurality of rectangular square tubes form a first network structure, the first network structure has a plurality of slots, a plurality of support tubes are provided on the tubes, the plurality of support tubes and the plurality of tubes form a second network structure, and the plurality of support tubes are provided with a plurality of supporting bottom tubes along the length direction.

[0014] As a preferred technical solution of the present invention, the first side panel, the second side panel, the cover panel, the pipe, the support pipe and the support bottom pipe are all provided with a wave structure; the pipe is provided with a positioning pin adapted to the product.

[0015] The anti-deformation material of the present invention is provided on the box structure. Specifically, the anti-deformation material is provided on the top end surface of the supporting base plate, has a thickness of 3 cm, and comprises the following components by weight:

[0016] 30-42 parts of modified castor oil, 6-12 parts of rosin ester polyol, 15-18 parts of polytetramethylene glycol, 20-25 parts of polyether polyol, 75-95 parts of diisocyanate, 5-10 parts of isocyanate, 1.0-1.6 parts of cellulose ether, 2.8-4.0 parts of catalyst, 2-5 parts of stabilizer, and 2-4 parts of deionized water;

[0017] Furthermore, the preparation method of the modified castor oil includes the following steps: under a nitrogen atmosphere, castor oil and 2-mercaptoethanol are stirred evenly, p-nitrobenzoic acid and a photoinitiator are added, stirred and mixed, and then ultraviolet treatment is performed to obtain modified castor oil; wherein the mass ratio of the castor oil, 2-mercaptoethanol, p-nitrobenzoic acid and photoinitiator is 60-72:40:0.3:2.4-3.3; the conditions of the ultraviolet treatment are 1400mW, 365nm ultraviolet rays, and irradiation for 7-10h.

[0018] In the above scheme, p-nitrobenzoic acid has an electron-withdrawing nitro group, a carboxyl group and a stable aromatic ring structure. A small amount of the carboxyl group undergoes an esterification reaction with the hydroxyl group, thereby introducing an electron-withdrawing group and an aromatic ring structure into the modified castor oil, thereby increasing the stability of the modified castor oil and at the same time making the modified castor oil have a nitro group. In addition, the introduction of the nitro group into the modified castor oil enhances the positive charge of the polymer group in the polyurethane synthesis process through the electron-withdrawing effect, significantly improving the cross-linking degree of the polyurethane matrix and forming a denser cross-linked structure.

[0019] As a preferred technical solution of the present invention, polyurethane with a high crosslink density exhibits greater strength, hardness, and wear resistance, enabling it to better absorb and disperse impact forces. Therefore, cushioning materials made from polyurethane with a high crosslink density exhibit improved cushioning performance. The dense structure of polyurethane means smaller gaps between molecules, resulting in improved sealing and shock absorption. When an external force acts on the polyurethane material, the dense structure restricts molecular movement, thereby slowing the propagation speed and amplitude of the impact force and providing a better cushioning effect.

[0020] As a preferred technical solution of the present invention, the polyether polyol is polyether polyol 3630; the molecular weight of the polytetramethylene glycol is 650-1000; the stabilizer is polyether-modified silicone oil; the diisocyanate is diphenylmethane diisocyanate; and the catalyst is a mixture of triethanolamine and bismuth isooctanoate in a mass ratio of 2.2-3.5:0.3-0.6.

[0021] The present invention discloses a method for preparing the anti-deformation material, comprising the following steps:

[0022] 1) adding modified castor oil, rosin ester polyol, polyether polyol, polytetramethylene glycol, cellulose ether, and a catalyst to deionized water and stirring and mixing to obtain a mixed solution; wherein the stirring and mixing is carried out at 1500-1800 r / min for 2-5 min;

[0023] 2) adding isocyanate to the mixed solution and stirring to mix, then adding diisocyanate and stabilizer and stirring evenly to obtain a mixture; wherein the stirring evenly is carried out at 500-700 r / min for 60-90 s to obtain a mixture;

[0024] 3) adding the mixture into a mold and heating it, cooling it to room temperature through air cooling and then allowing it to stand to obtain a bio-based polyurethane cushioning material; wherein the heating treatment conditions are 30-35° C. for 10-16 minutes; and the standing time is 18-24 hours.

[0025] As a preferred technical solution of the present invention, linseed oil was purchased from Jiangxi Hairui Natural Plant Co., Ltd., isocyanate was purchased from Beijing Baiyuan Chemical Co., Ltd., model WTDI-02, polyether-modified silicone oil was purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd., model SH-431, and rosin ester polyol was purchased from Shandong Moore Chemical Co., Ltd.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention adopts a wave structure to achieve lightweight design while ensuring the firmness of the box structure, and each component is detachable, which is convenient for transportation and installation. The overall box structure has good load-bearing capacity, stability and good buffering performance.

[0028] 2. The present invention modifies castor oil to contain multiple hydroxyl groups. During the polyurethane synthesis process, when the modified castor oil participates in the reaction and forms a composite material, not only can good physical effects be formed between the various components, but also covalent bonds are formed. By controlling the degree of cross-linking and hybrid structure of the polyurethane, the polyurethane has a good dense structure, thereby improving the cushioning performance and service life of the polyurethane material. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 It is a structural schematic diagram of the box structure proposed by the present invention;

[0031] Figure 2 It is an exploded view of the box structure proposed by the present invention;

[0032] Figure 3 It is a schematic diagram of the base structure in the box structure proposed by the present invention. DETAILED DESCRIPTION

[0033] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0034] like Figures 1 to 3 As shown, a box structure of a special anti-deformation material for a pallet, the box structure includes a base 1, a cover plate 2, two first side plates 3, two second side plates 4 and a plurality of pull rods 5, the bottoms of the two first side plates 3 are clamped on the base 1, the bottoms of the two second side plates 4 are clamped on the base 1, and the two first side plates 3 and the two second side plates 4 are clamped together to form a circular structure through the side ends, a plurality of the pull rods 5 are clamped in an array between the tops of the two first side plates 3, the two first side plates 3 are provided with a latch assembly 6, the bottom of the cover plate 2 is clamped on the tops of the two first side plates 3 and the two second side plates 4, and when in use, The product is placed on the base 1 and fixed in the upper limit position. The first side panel 3 and the second side panel 4 are clamped on the base 1, and a circular structure is formed by the two first side panels 3 and the two second side panels 4. Then, the pull rod 5 is installed between the tops of the two first side panels 3 and clamped together, so that the two first side panels 3 are more firm, not easy to deform and have good load-bearing capacity. Then, the cover panel 2 is clamped on the tops of the two first side panels 3 and the two second side panels 4. Finally, the base 1, the two first side panels 3, the two second side panels 4 and the cover panel 2 form a six-sided covering protection for the product, which effectively protects the safety of the product and facilitates the transportation of the product.

[0035] The base 1 is provided with two first card slots with a symmetrical structure and two second card slot assemblies with a symmetrical structure, and the two second card slot assemblies include a plurality of second card slots. The segmented setting of the plurality of second card slots can effectively reduce the weight of the box structure compared with the overall structure, thereby achieving lightweighting; the bottom of the first side panel 3 is engaged with the first card slot, and the bottom of the second side panel 4 is engaged with the second card slot, and a first U-shaped square tube is provided on both side ends of the two first side panels 3, and a second U-shaped square tube is provided on both side ends of the two second side panels 4, the openings of the first U-shaped square tube and the second U-shaped square tube are both facing the base 1, and the first U-shaped square tube and the second U-shaped square tube are engaged with each other; after the first U-shaped square tube and the second U-shaped square tube are engaged, part of the structure overlaps, which effectively enhances the longitudinal load-bearing capacity and makes the structure more stable; further, through the setting of the card slot and U-shaped square tube structure, the lightweight of the box structure is further achieved.

[0036] Both ends of several of the pull rods 5 are provided with U-shaped blocks, and the U-shaped blocks are engaged with the top of the first side panel 3; when the pull rods 5 are installed, they are preferably set at the top of the longer side panel. The railing can effectively improve the lateral force performance of the longer side panel, and under the joint action of multiple pull rods 5, it is not easy to deform; the number of pull rods 5 can be set according to the length of the side panel. Preferably, the number of pull rods 5 is at least two.

[0037] A third slot is provided on the periphery of the bottom of the cover plate 2 , the opening of the third slot faces the first side plate 3 and the second side plate 4 , and the third slot is engaged with the top of the first side plate 3 and the second side plate 4 .

[0038] There are several latch assemblies 6, and the several latch assemblies 6 include a guide support provided on the first side panel 3, a handle body movably fitted on the through hole of the guide support, and a limit block provided on the first side panel 3, and the limit block matches the handle body.

[0039] The four corners of the cover plate 2 are provided with connecting members 7, and the connecting members 7 include a vertical portion and a guide portion extending outward along the top end of the vertical portion, the upper portion of the vertical portion extends outward from the upper end surface of the cover plate 2, and the lower portion of the vertical portion extends outward from the bottom end surface of the cover plate 2 and the inner wall surface of the lower portion of the vertical portion is in contact with the first side panel 3 and the second side panel 4; in this design, the vertical portion is conducive to the cover plate 2 being snapped onto the first side panel 3 and the second side panel 4, and the snapped state is that the lower portion of the vertical portion is close to or in contact with the first side panel 3 or the second side panel 4; and the design of the upper portion of the vertical portion is to facilitate the other base 1 to be superimposed on the cover plate 2. In the superimposed state, the upper portion of the vertical portion is close to or in contact with the base 1, and the setting of the guide portion facilitates the snap-on installation of the base 1.

[0040] The base 1, the two first side panels 3 and the two second side panels 4 are detachably connected, the cover 2, the two first side panels 3 and the two second side panels 4 are detachably connected, and the two first side panels 3 and the plurality of pull rods 5 are detachably connected; the box structure adopts the above-mentioned design, and the entire structure is detachably connected, and each component is easy to carry and install without the need for screws, nuts and other parts, and the installation is convenient and quick.

[0041] The base 1 includes a plurality of rectangular square tubes 8 arranged in an array and a plurality of tubes 9 arranged in an array. The plurality of tubes 9 are respectively arranged at the top and bottom of the plurality of rectangular square tubes 8, and the plurality of tubes 9 and the plurality of rectangular square tubes 8 form a first network structure. The first network structure has a plurality of slots. The tubes 9 are provided with a plurality of support tubes 10. The plurality of support tubes 10 and the plurality of tubes 9 form a second network structure. The plurality of support tubes 10 are provided with a plurality of supporting bottom tubes 11 along the length direction. The arrangement of the first network structure and the second network structure ensures the overall firmness of the box structure while effectively supporting the product, and the network structure is lightweight, which greatly reduces the overall weight of the box structure.

[0042] The first side panel 3, the second side panel 4, the cover plate 2, the pipe 9, the support pipe 10 and the support bottom pipe 11 are all provided with a wave structure; the wave structure can effectively reduce its weight while ensuring the firmness of the box structure, further lightweighting it, and the pipe 9 is provided with a positioning pin adapted to the product, and the positioning pin is used to limit and fix the product.

[0043] Specifically, in order to ensure the stability of the product during transportation, the present invention sets a 3 mm thick anti-deformation material 12 on the supporting bottom tube 11 to achieve good buffering performance of the chassis, so that it can effectively form a shock-absorbing effect on the product.

[0044] Example 1

[0045] The anti-deformation material comprises the following components in parts by weight:

[0046] 30 parts of modified castor oil, 6 parts of rosin ester polyol, 15 parts of polytetramethylene glycol, 20 parts of polyether polyol, 75 parts of diisocyanate, 5 parts of isocyanate, 1.0 part of cellulose ether, 2.8 parts of catalyst, 2 parts of stabilizer, and 2 parts of deionized water; wherein the polyether polyol is polyether polyol 3630; the molecular weight of the polytetramethylene glycol is 650; the stabilizer is polyether-modified silicone oil; the diisocyanate is diphenylmethane diisocyanate; and the catalyst is a mixture of triethanolamine and bismuth isooctanoate in a mass ratio of 2.2:0.3.

[0047] The modified castor oil preparation method comprises the following steps: under a nitrogen atmosphere, uniformly stirring castor oil and 2-mercaptoethanol, adding p-nitrobenzoic acid and a photoinitiator 651, stirring and mixing, and then treating with ultraviolet light to obtain the modified castor oil; wherein the mass ratio of the castor oil, 2-mercaptoethanol, p-nitrobenzoic acid, and photoinitiator 651 is 60:40:0.3:2.4; and the ultraviolet light treatment is performed under 1400 mW, 365 nm ultraviolet light, and irradiation for 7 hours.

[0048] The preparation method of the anti-deformation material comprises the following steps:

[0049] 1) adding modified castor oil, rosin ester polyol, polyether polyol, polytetramethylene glycol, cellulose ether, and a catalyst to deionized water and stirring and mixing to obtain a mixed solution; wherein the stirring and mixing conditions are at 1500 r / min and stirring for 2 minutes;

[0050] 2) adding isocyanate to the mixed solution and stirring to mix, then adding diisocyanate and stabilizer and stirring to obtain a mixture; wherein the stirring is carried out at 500 r / min for 60 s to obtain a mixture;

[0051] 3) adding the mixture into a mold and heating it, cooling it to room temperature through air cooling and then allowing it to stand to obtain a bio-based polyurethane cushioning material; wherein the heating treatment conditions are at a temperature of 30° C. for 10 minutes; and the standing time is 18 hours.

[0052] Example 2

[0053] The anti-deformation material comprises the following components in parts by weight:

[0054] 34 parts of modified castor oil, 8 parts of rosin ester polyol, 16 parts of polytetramethylene glycol, 22 parts of polyether polyol, 82 parts of diisocyanate, 7 parts of isocyanate, 1.2 parts of cellulose ether, 3.2 parts of catalyst, 3 parts of stabilizer, and 2.7 parts of deionized water; wherein the polyether polyol is polyether polyol 3630; the molecular weight of the polytetramethylene glycol is 750; the stabilizer is polyether-modified silicone oil; the diisocyanate is diphenylmethane diisocyanate; and the catalyst is a mixture of triethanolamine and bismuth isooctanoate in a mass ratio of 2.6:0.4.

[0055] The preparation method of the modified castor oil comprises the following steps: under a nitrogen atmosphere, uniformly stirring castor oil and 2-mercaptoethanol, adding p-nitrobenzoic acid and a photoinitiator 651, stirring and mixing, and then treating with ultraviolet light to obtain the modified castor oil; wherein the mass ratio of the castor oil, 2-mercaptoethanol, p-nitrobenzoic acid, and photoinitiator 651 is 64:40:0.3:2.7; and the ultraviolet light treatment is performed under 1400 mW, 365 nm ultraviolet light, and irradiation for 8 hours.

[0056] The preparation method of the anti-deformation material comprises the following steps:

[0057] 1) adding modified castor oil, rosin ester polyol, polyether polyol, polytetramethylene glycol, cellulose ether, and a catalyst to deionized water and stirring and mixing to obtain a mixed solution; wherein the stirring and mixing conditions are at 1600 r / min and stirring for 3 minutes;

[0058] 2) adding isocyanate to the mixed solution and stirring to mix, then adding diisocyanate and stabilizer and stirring evenly to obtain a mixture; wherein the stirring condition is 560 r / min and stirring for 70 s to obtain a mixture;

[0059] 3) adding the mixture into a mold and heating it, cooling it to room temperature through air cooling and then allowing it to stand to obtain a bio-based polyurethane cushioning material; wherein the heating treatment conditions are 32° C. for 12 minutes and the standing time is 20 hours.

[0060] Example 3

[0061] The anti-deformation material comprises the following components in parts by weight:

[0062] 38 parts of modified castor oil, 10 parts of rosin ester polyol, 17 parts of polytetramethylene glycol, 23 parts of polyether polyol, 88 parts of diisocyanate, 8 parts of isocyanate, 1.4 parts of cellulose ether, 3.6 parts of catalyst, 4 parts of stabilizer, and 3.3 parts of deionized water; wherein the polyether polyol is polyether polyol 3630; the molecular weight of the polytetramethylene glycol is 800; the stabilizer is polyether-modified silicone oil; the diisocyanate is diphenylmethane diisocyanate; and the catalyst is a mixture of triethanolamine and bismuth isooctanoate in a mass ratio of 3.1:0.5.

[0063] The modified castor oil preparation method comprises the following steps: under a nitrogen atmosphere, uniformly stirring castor oil and 2-mercaptoethanol, adding p-nitrobenzoic acid and a photoinitiator 651, stirring and mixing, and then treating with ultraviolet light to obtain the modified castor oil; wherein the mass ratio of the castor oil, 2-mercaptoethanol, p-nitrobenzoic acid, and photoinitiator 651 is 68:40:0.3:3; and the ultraviolet light treatment is performed under 1400 mW, 365 nm ultraviolet light, and irradiation for 9 hours.

[0064] The preparation method of the anti-deformation material comprises the following steps:

[0065] 1) adding modified castor oil, rosin ester polyol, polyether polyol, polytetramethylene glycol, cellulose ether, and a catalyst to deionized water and stirring and mixing to obtain a mixed solution; wherein the stirring and mixing conditions are at 1700 r / min and stirring for 4 minutes;

[0066] 2) adding isocyanate to the mixed solution and stirring to mix, then adding diisocyanate and stabilizer and stirring evenly to obtain a mixture; wherein the stirring condition is 630 r / min and stirring for 80 s to obtain a mixture;

[0067] 3) adding the mixture into a mold and heating it, cooling it to room temperature through air cooling and then allowing it to stand to obtain a bio-based polyurethane cushioning material; wherein the heating treatment conditions are 33° C. for 14 minutes and the standing time is 22 hours.

[0068] Example 4

[0069] The anti-deformation material comprises the following components in parts by weight:

[0070] 42 parts of modified castor oil, 12 parts of rosin ester polyol, 18 parts of polytetramethylene glycol, 25 parts of polyether polyol, 95 parts of diisocyanate, 10 parts of isocyanate, 1.6 parts of cellulose ether, 4.0 parts of catalyst, 5 parts of stabilizer, and 4 parts of deionized water; wherein the polyether polyol is polyether polyol 3630; the molecular weight of the polytetramethylene glycol is 1000; the stabilizer is polyether-modified silicone oil; the diisocyanate is diphenylmethane diisocyanate; and the catalyst is a mixture of triethanolamine and bismuth isooctanoate in a mass ratio of 3.5:0.6.

[0071] The modified castor oil preparation method comprises the following steps: under a nitrogen atmosphere, uniformly stirring castor oil and 2-mercaptoethanol, adding p-nitrobenzoic acid and a photoinitiator 651, stirring and mixing, and then treating with ultraviolet light to obtain the modified castor oil; wherein the mass ratio of the castor oil, 2-mercaptoethanol, p-nitrobenzoic acid, and photoinitiator 651 is 72:40:0.3:3.3; and the ultraviolet light treatment condition is irradiation at 1400 mW, 365 nm ultraviolet light, and 10 hours.

[0072] The preparation method of the anti-deformation material comprises the following steps:

[0073] 1) adding modified castor oil, rosin ester polyol, polyether polyol, polytetramethylene glycol, cellulose ether, and a catalyst to deionized water and stirring and mixing to obtain a mixed solution; wherein the stirring and mixing conditions are at 1800 r / min and stirring for 5 minutes;

[0074] 2) adding isocyanate to the mixed solution and stirring to mix, then adding diisocyanate and stabilizer and stirring to obtain a mixture; wherein the stirring is carried out at 700 r / min for 90 s to obtain a mixture;

[0075] 3) adding the mixture into a mold and heating it, cooling it to room temperature through air cooling, and then allowing it to stand to obtain a bio-based polyurethane cushioning material; wherein the heating treatment conditions are 35° C. for 16 minutes; and the standing time is 24 hours.

[0076] Comparative Example 1

[0077] Compared with Example 2, the difference is that comparative example 1 uses castor oil instead of modified castor oil, and the other components, preparation steps and parameters are the same.

[0078] Comparative Example 2

[0079] Compared with Example 2, the difference is that castor oil is used instead of rosin ester polyol in Comparative Example 2, and the other components, preparation steps and parameters are the same.

[0080] Comparative Example 3

[0081] Compared with Example 2, difference is that, Comparative Example 3 adopts polyether polyol 3630 to replace polytetrahydrofuran diol, and all the other components, preparation steps and parameters are all consistent.

[0082] Comparative Example 4

[0083] Compared with Example 2, the difference is that Comparative Example 4 uses silicone oil instead of polyether-modified silicone oil, and the other components, preparation steps and parameters are the same.

[0084] Comparative Example 5

[0085] Compared with Example 2, the difference is that Comparative Example 5 uses photoinitiator 651 instead of p-nitrobenzoic acid, and the other components, preparation steps and parameters are the same.

[0086] Cushioning performance test: According to GB / T8168-2008, the anti-deformation materials prepared in Examples 1-4 and Comparative Examples 1-5 were repeatedly compressed 100 times with a deformation load of 20% of the thickness, and the cushioning coefficient C was calculated; the test results are shown in Table 1.

[0087] Compression performance test: According to GB / T8813-2008, the anti-deformation materials prepared in Examples 1-4 and Comparative Examples 1-5 were cut into standard sizes and compressed at a compression rate of 10 mm / min to 25% of the sample thickness. The compressive strength and compression modulus were calculated. The test results are shown in Table 1.

[0088] Table 1

[0089]

[0090]

[0091] From the test results in Table 1, it can be seen that compared with Comparative Examples 1-5, the cushioning performance and compression performance of the anti-deformation material prepared in Examples 1-4 are significantly better than those in Comparative Examples 1-5.

[0092] As can be seen from Table 1 in conjunction with Example 1-4 and Comparative Examples 1-5, this is because the modified castor oil contains polyhydroxy and rosin ester polyol has a plurality of hydroxyl groups, can react with polyether alcohols such as polyglycol ether, and generate a cross-linked structure. Polytetrahydrofuran diol can be used as a chain extender in polyurethane synthesis with diisocyanate, isocyanate reaction, increases the length of the molecular chain, and also helps to form a cross-linked structure. Polyether-modified silicone oil can be used as a cross-linking agent to form a unique siloxane group, which increases the cross-linking density of polyurethane. p-Nitrobenzoic acid can be used as a cross-linking catalyst to promote polyurethane building-up reactions by the electron-withdrawing ability of nitro, further promoting the formation of a cross-linked structure.

[0093] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A box structure made of a special anti-deformation material for pallets, characterized by: The box structure includes a base, a cover, two first side panels, two second side panels and a plurality of pull rods, the bottoms of the two first side panels are clamped on the base, the bottoms of the two second side panels are clamped on the base, and the two first side panels and the two second side panels are clamped together to form a circular structure through the side ends, a plurality of the pull rods are clamped in an array between the tops of the two first side panels, the two first side panels are each provided with a latch assembly, and the bottom of the cover is clamped on the tops of the two first side panels and the two second side panels; The anti-deformation material is provided on the box structure, and the anti-deformation material comprises the following components in parts by weight: 30-42 parts of modified castor oil, 6-12 parts of rosin ester polyol, 15-18 parts of polytetramethylene glycol, 20-25 parts of polyether polyol, 75-95 parts of diisocyanate, 5-10 parts of isocyanate, 1.0-1.6 parts of cellulose ether, 2.8-4.0 parts of catalyst, 2-5 parts of stabilizer, and 2-4 parts of deionized water; The modified castor oil preparation method comprises the following steps: under a nitrogen atmosphere, uniformly stirring castor oil and 2-mercaptoethanol, adding p-nitrobenzoic acid and a photoinitiator, stirring and mixing, and then treating with ultraviolet light to obtain the modified castor oil; wherein the mass ratio of the castor oil, 2-mercaptoethanol, p-nitrobenzoic acid, and photoinitiator is 60-72:40:0.3:2.4-3.3; and the ultraviolet light treatment condition is irradiation at 1400 mW, 365 nm ultraviolet light, and irradiation for 7-10 hours; The polyether polyol is polyether polyol 3630; the molecular weight of the polytetramethylene glycol is 650-1000; the stabilizer is polyether modified silicone oil; the diisocyanate is diphenylmethane diisocyanate; and the catalyst is a mixture of triethanolamine and bismuth isooctanoate in a mass ratio of 2.2-3.5:0.3-0.

6. The preparation method of the anti-deformation material comprises the following steps: 1) adding modified castor oil, rosin ester polyol, polyether polyol, polytetramethylene glycol, cellulose ether, and a catalyst to deionized water and stirring to obtain a mixed solution; wherein the stirring and mixing is performed at 1500-1800 r / min for 2-5 minutes; 2) adding isocyanate to the mixed solution and stirring to mix, then adding diisocyanate and stabilizer and stirring evenly to obtain a mixture; wherein the stirring evenly is carried out at 500-700 rpm for 60-90 seconds to obtain the mixture; 3) adding the mixture into a mold and heating it, cooling it to room temperature through air cooling, and then allowing it to stand to obtain a bio-based polyurethane cushioning material; wherein the heating treatment conditions are 30-35° C. for 10-16 minutes, and the standing time is 18-24 hours.

2. The box structure of the pallet-specific anti-deformation material according to claim 1, characterized in that: The base is provided with two first card slots with a symmetrical structure and two second card slot assemblies with a symmetrical structure, and the two second card slot assemblies include a plurality of second card slots, the bottom of the first side plate is engaged with the first card slot, and the bottom of the second side plate is engaged with the second card slot, and a first U-shaped square passage is provided on both side ends of the two first side plates, and a second U-shaped square passage is provided on both side ends of the two second side plates, and the openings of the first U-shaped square passage and the second U-shaped square passage are both facing the base, and the first U-shaped square passage and the second U-shaped square passage are engaged with each other; Both ends of the plurality of pull rods are provided with U-shaped blocks, and the U-shaped blocks are engaged with the top of the first side plate; A third slot is provided on the periphery of the bottom of the cover plate, the opening of the third slot faces the first side plate and the second side plate, and the third slot is engaged with the top of the first side plate and the second side plate.

3. The box structure of the pallet-specific anti-deformation material according to claim 1, characterized in that: There are several latch assemblies, and the several latch assemblies include a guide support provided on the first side panel, a handle body movably fitted on the through hole of the guide support, and a limit block provided on the first side panel, and the limit block matches the handle body.

4. The box structure of the pallet-specific anti-deformation material according to claim 1, characterized in that: Connecting parts are provided on the four corners of the cover plate, and the connecting parts include a vertical part and a guide part extending outward along the top end of the vertical part. The upper part of the vertical part extends out of the upper end surface of the cover plate, and the lower part of the vertical part extends out of the bottom end surface of the cover plate, and the inner wall surface of the lower part of the vertical part is in contact with the first side panel and the second side panel.

5. The box structure of the pallet-specific anti-deformation material according to claim 1, characterized in that: The base, the two first side panels and the two second side panels are detachably connected, the cover, the two first side panels and the two second side panels are detachably connected, and the two first side panels and the plurality of pull rods are detachably connected.

6. The box structure of the anti-deformation material for pallets according to claim 1, characterized in that: The base includes a plurality of rectangular square tubes arranged in an array and a plurality of pipes arranged in an array. The pipes are respectively arranged at the top and bottom of the rectangular square tubes, and the pipes and the rectangular square tubes form a first network structure. The first network structure has a plurality of slots. The pipes are provided with a plurality of support pipes. The support pipes and the pipes form a second network structure. The support pipes are provided with a plurality of supporting bottom pipes along the length direction.

7. The box structure of the pallet-specific anti-deformation material according to claim 6, characterized in that: The first side plate, the second side plate, the cover plate, the pipe, the support pipe and the support bottom pipe are all provided with a wave structure; the pipe is provided with a positioning pin adapted to the product.

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