Anti-deformation and wear-resistant blister box
Through a double-layer structure and optimized material design, the blister box solves the problem of insufficient toughness and wear resistance of existing blister boxes, achieving higher resistance to deformation, wear resistance and heat preservation performance, making it suitable for mid-to-high-end food packaging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG TANGSHENG NEW MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-14
AI Technical Summary
Existing blister packs have limited room for improvement in parameters such as toughness and abrasion resistance, resulting in weak protective effects.
The blister box features a double-layer structure. The outer and inner boxes are interlocked by limiting posts, creating a buffer space between them. The outer box and lid are reinforced with ribs to distribute stress. The outer box is made of modified PET material, while the inner box is made of high-density PP material. The outer box is coated with a food-grade two-component waterborne polyurethane coating.
The design improves the blister pack's resistance to deformation and abrasion, reduces the possibility of food leakage, enhances its heat preservation performance, supports microwave heating, and improves its structural stability and safety.
Smart Images
Figure CN224491874U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic packaging technology, specifically to a blister box that is resistant to deformation and wear. Background Technology
[0002] Blister boxes typically refer to plastic boxes formed by vacuum forming of sheet materials. This process involves heating and softening a plastic sheet, then using vacuum suction to deform and adhere it to the surface of a mold. Once the plastic cools and solidifies, it is formed into its desired shape. Blister boxes are widely used in food packaging, pharmaceutical packaging, and electronic product packaging.
[0003] Existing blister packs are made of various materials. Some materials are impact-resistant and tough, making them less prone to damage. Others are heat-resistant and microwave-safe. Still others are wear-resistant and less likely to tear. However, the nature of plastics means that the protective effect of the packaging is still relatively weak. The toughness and wear resistance are only better than other plastics. Changing the material can only improve the overall performance to a limited extent. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide a deformation-resistant and wear-resistant blister box to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a deformation-resistant and wear-resistant blister box, including an outer box, an inner box connected inside the outer box, and limit posts fixed on both sides of the inner box, a third transverse reinforcing rib and a third grid reinforcing rib fixed at the bottom of the inner box, and a box cover connected to the top of the inner box.
[0006] By adopting the above technical solution, after the outer box, lid, and inner box are formed, the inner box is simply embedded into the outer box using the limiting posts. The limiting posts can also act as inserts with an interference fit at the four corners of the inner side of the outer box, preventing the inner box from easily falling off. Then, the lid is fastened to the top of the outer box and the inner box to complete the assembly. The inlay of the inner and outer boxes creates a double-layer structure for the entire box. The presence of the limiting posts ensures the distance between the inner and outer boxes, preventing the inner box from shaking. The outer box is mainly used to withstand impacts and friction damage, while the inner box can store and protect food. If necessary, the inner box can be removed separately and placed in a microwave oven for reheating. The double-layer structure creates a buffer space between the outer and inner boxes, increasing impact resistance. The possibility of the inner box remaining intact even if the outer box breaks is higher, reducing the possibility of food leakage. Furthermore, the buffer space reduces the contact area between the outer and inner boxes, increasing heat preservation performance.
[0007] Furthermore, a plurality of first vertical reinforcing ribs are fixed to the outer surface, sides and back of the outer box, and a first horizontal reinforcing rib and a first mesh reinforcing rib are fixed to the bottom of the outer box.
[0008] By adopting the above technical solution, the outer box disperses stress through the first vertical reinforcing rib, the first horizontal reinforcing rib, and the first mesh reinforcing rib, thereby increasing the outer box's resistance to deformation.
[0009] Furthermore, multiple second vertical reinforcing ribs are fixed to the outer surface, sides and back of the box cover, and a second horizontal reinforcing rib and a second mesh reinforcing rib are fixed to the top of the box cover.
[0010] By adopting the above technical solution, the box lid disperses stress through the second vertical reinforcing rib, the second horizontal reinforcing rib, and the second grid reinforcing rib, thereby increasing the deformation resistance of the outer box.
[0011] Furthermore, the first, second, and third mesh reinforcing ribs are all inclined at an angle of 45°.
[0012] By adopting the above technical solutions, the inclined grid exhibits greater stability under dynamic loads compared to the traditional grid, and the diagonal structure can disperse stress from different directions, resulting in better torsional and shear resistance.
[0013] Furthermore, the bottom of the limiting post contacts the lower part of the inner side of the outer box.
[0014] By adopting the above technical solution, the presence of the limiting post can ensure the distance between the inner box and the outer box, and prevent the inner box from shaking randomly.
[0015] Furthermore, a gap is provided between the outer box and the inner box.
[0016] By adopting the above technical solution, the double-layer structure creates a buffer space between the outer box and the inner box, which increases impact resistance. The possibility of the inner box remaining intact even if the outer box breaks is relatively high, reducing the occurrence of food leakage. In addition, the existence of the buffer space reduces the contact area between the outer box and the inner box, which increases the heat preservation performance to a certain extent.
[0017] Furthermore, the side of the limiting post is interference-fitted with the inner side of the outer box, and the inner side of the box cover is interference-fitted with the top of the outer box and the top of the inner box, respectively.
[0018] By adopting the above technical solution, after the outer box, lid and inner box are formed, the inner box can be embedded into the outer box by means of the limiting post, and the limiting post can be used as an insert to make interference fit with the four corners of the inner side of the outer box. Then the lid can be fastened to the top of the outer box and the inner box to complete the assembly.
[0019] Furthermore, the outer box, box cover, first vertical reinforcing rib, first horizontal reinforcing rib, first mesh reinforcing rib, second vertical reinforcing rib, second horizontal reinforcing rib and second mesh reinforcing rib are all made of modified PET material, and the modified PET material is made by blending and extruding 12% POE elastomer, 3% nano silica and 85% PET substrate.
[0020] By adopting the above technical solution, both the outer box and the lid are made of modified PET. POE elastomer increases the impact toughness of the PET substrate, while nano silica increases the wear resistance of the PET substrate, making the outer box and lid strong, with good impact toughness and a certain degree of wear resistance.
[0021] Furthermore, the inner box, the limiting post, the third transverse reinforcing rib, and the third grid reinforcing rib are all made of high-density PP material.
[0022] By adopting the above technical solution, the inner box is made of high-density PP material, which has high tensile strength and good rigidity, as well as good impact toughness. At the same time, the heat resistance of high-density PP is much higher than that of modified PET or other packaging plastics, so it is easy to reheat food in a microwave oven, thus meeting the requirements of high strength and reheatability.
[0023] Furthermore, the outer box, the lid, the first vertical reinforcing rib, the first horizontal reinforcing rib, the first mesh reinforcing rib, the second vertical reinforcing rib, the second horizontal reinforcing rib, and the second mesh reinforcing rib are all coated with a food-grade two-component waterborne polyurethane coating.
[0024] By adopting the above technical solution, a food-grade two-component waterborne polyurethane coating is applied to the outer side of the outer box and lid. After curing, the coating forms a highly cross-linked network, which improves the wear resistance of the outer box and lid surface by several times. Coating only the outer side has two advantages: first, the scratched area is usually on the outside, and the inner side is not affected by scratches. Coating only the outer side can reduce costs and waste. Second, the coating does not come into contact with food, which further improves safety. Even if food is spilled and comes into contact with the coating, the two-component waterborne polyurethane coating forms a dense coating through chemical cross-linking, which can block the migration of unreacted monomers in the coating to the food, so there is no impact.
[0025] In summary, the present invention has the following main advantages:
[0026] 1. This utility model features an outer box and an inner box, with the inner box embedded in the outer box, creating a double-layer structure for the entire box. The outer box primarily withstands impact and friction damage, while the inner box stores and protects the food. If necessary, the inner box can be removed separately and placed in a microwave oven for reheating. The double-layer structure creates a buffer space between the outer and inner boxes, increasing impact resistance and reducing the likelihood of the inner box remaining intact even if the outer box breaks, thus minimizing food leakage. The buffer space also reduces the contact area between the outer and inner boxes, increasing insulation performance. Through structural optimization, the strength and functionality of the blister box are improved, and with material optimization, performance can be further enhanced. Compared to traditional single-layer blister boxes, it offers better performance and is suitable for packaging some mid-to-high-end foods.
[0027] 2. By setting the limiting post, this utility model can ensure the distance between the inner box and the outer box, prevent the inner box from shaking at will, and the limiting post can also be used as an insert to make an interference fit with the four corners of the inner wall of the outer box, preventing the inner box from falling off easily; thus improving the structural stability.
[0028] 3. This utility model uses a limiting post, a third transverse reinforcing rib, and a third mesh reinforcing rib to disperse the bottom stress of the inner box. The limiting post can also act as a vertical reinforcing rib to enhance and disperse the stress on the four sides of the inner box, thus preventing the inner box from easily bending and deforming when it is taken out. This improves the stability of the inner box shape and prevents the inner box from easily deforming and generating kinetic energy that could cause food to spill out. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of this utility model;
[0030] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0031] Figure 3 This is a side sectional view of the present invention.
[0032] Figure 4 This is a schematic diagram of the box lid structure of this utility model;
[0033] Figure 5 This is a bottom view of the outer box structure of this utility model;
[0034] Figure 6 This is a bottom view of the inner box structure of this utility model.
[0035] In the diagram: 1. Outer box; 2. Box lid; 3. Inner box; 4. Limiting post; 5. First vertical reinforcing rib; 6. First horizontal reinforcing rib; 7. First grid reinforcing rib; 8. Second vertical reinforcing rib; 9. Second horizontal reinforcing rib; 10. Second grid reinforcing rib; 11. Third horizontal reinforcing rib; 12. Third grid reinforcing rib. Detailed Implementation
[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0037] The embodiments of this utility model will be described below based on its overall structure.
[0038] Example 1:
[0039] A type of deformation-resistant and wear-resistant blister box, such as Figures 1-6 As shown, the device includes an outer box 1, with an inner box 3 connected inside. A gap exists between the outer box 1 and the inner box 3. Limiting posts 4 are fixed on both sides of the inner box 3. The sides of the limiting posts 4 are interference-fitted with the inner side of the outer box 1, and the bottom of the limiting posts 4 contacts the lower interior of the outer box 1. A third transverse reinforcing rib 11 and a third mesh reinforcing rib 12 are fixed to the bottom of the inner box 3. The first mesh reinforcing rib 7, the second mesh reinforcing rib 10, and the third mesh reinforcing rib 12 are all inclined at an angle of 45°. A lid 2 is connected to the top of the inner box 3. The inner side of the lid 2 is interference-fitted with the top of the outer box 1 and the top of the inner box 3, respectively. The presence of the limiting posts 4 ensures the gap between the inner box 3 and the outer box 1, preventing the inner box 3 from being moved arbitrarily. The inner box 3 is designed to prevent the inner box 3 from easily falling off, as the limiting post 4 can act as an insert and have an interference fit with the four corners of the inner side of the outer box 1. The inner box 3 and the outer box 1 are inlaid to make the whole box a double-layer structure. The outer box 1 is mainly used to withstand impact, friction and other damage, while the inner box 3 can store and protect food. If necessary, the inner box 3 can be taken out separately and placed in the microwave oven for secondary heating of food. The double-layer structure has a gap between the outer box 1 and the inner box 3 to form a buffer space, which increases the impact resistance. The outer box 1 is more likely to break while the inner box 3 remains intact, reducing the occurrence of food leakage. The existence of the buffer space reduces the contact area between the outer box 1 and the inner box 3, which increases the heat preservation performance.
[0040] See Figures 1-5In the above embodiment, a plurality of first vertical reinforcing ribs 5 are fixed to the outer surface, sides and back of the outer box 1, and a first horizontal reinforcing rib 6 and a first mesh reinforcing rib 7 are fixed to the bottom of the outer box 1. The outer box 1 disperses stress through the first vertical reinforcing ribs 5, the first horizontal reinforcing ribs 6 and the first mesh reinforcing ribs 7, thereby increasing the deformation resistance of the outer box 1. A plurality of second vertical reinforcing ribs 8 are fixed to the outer surface, sides and back of the box cover 2, and a second horizontal reinforcing rib 9 and a second mesh reinforcing rib 10 are fixed to the top of the box cover 2. The box cover 2 disperses stress through the second vertical reinforcing ribs 8, the second horizontal reinforcing ribs 9 and the second mesh reinforcing ribs 10, thereby increasing the deformation resistance of the outer box 1.
[0041] Example 2:
[0042] Based on the above embodiment one, in order to optimize the strength of the blister box from the material perspective and achieve better strength and functionality in conjunction with structural optimization, the following settings are now implemented.
[0043] See Figures 1-6 In the above embodiments, the outer box 1, the lid 2, the first vertical reinforcing rib 5, the first horizontal reinforcing rib 6, the first mesh reinforcing rib 7, the second vertical reinforcing rib 8, the second horizontal reinforcing rib 9, and the second mesh reinforcing rib 10 are all made of modified PET material. The modified PET material is made by blending and extruding 12% POE elastomer, 3% nano-silica, and 85% PET substrate. The outer box 1 and the lid 2 are both made of modified PET, which has high strength, good impact toughness, and certain wear resistance. It can be combined with the first vertical reinforcing rib 5, the first horizontal reinforcing rib 6, the first mesh reinforcing rib 7, the second vertical reinforcing rib 8, the second horizontal reinforcing rib 9, and the second mesh reinforcing rib 10 to further improve the structural strength. The inner box 3, the limiting post 4, the third horizontal reinforcing rib 11, and the third mesh reinforcing rib 12 are all made of high-density PP material, which has high tensile strength, good rigidity, and good impact toughness. At the same time, the heat resistance of high-density PP is much higher than that of modified PET or other packaging plastics, so it is easy to reheat food in a microwave oven, thus meeting the requirements of high strength and reheatability.
[0044] Example 3:
[0045] Based on the above embodiment one, in order to further improve the wear resistance of the blister box, the following settings are now implemented.
[0046] See Figures 1-5In the above embodiments, the outer box 1, the lid 2, the first vertical reinforcing rib 5, the first horizontal reinforcing rib 6, the first mesh reinforcing rib 7, the second vertical reinforcing rib 8, the second horizontal reinforcing rib 9, and the second mesh reinforcing rib 10 are all coated with a food-grade two-component waterborne polyurethane coating. The food-grade two-component waterborne polyurethane coating is coated on the outside of the outer box 1 and the lid 2. After the coating is cured, it forms a highly cross-linked network, which improves the wear resistance of the outer box 1 and the lid 2 several times. Coating only the outside has two advantages: first, the scratch area is usually on the outside, and the inside is not affected by scratches. Coating only the outside can reduce costs and waste. Second, the coating does not come into contact with food, which further improves safety. Even if food is spilled and comes into contact with the coating, the two-component waterborne polyurethane coating forms a dense coating through chemical cross-linking, which can block the migration of unreacted monomers in the coating to the food, so there is no impact.
[0047] The implementation principle of this utility model is as follows: First, the outer box 1, the first vertical reinforcing rib 5, the first horizontal reinforcing rib 6, and the first mesh reinforcing rib 7 are integrally formed by vacuum forming modified PET sheet. The box cover 2, the second vertical reinforcing rib 8, the second horizontal reinforcing rib 9, and the second mesh reinforcing rib 10 are also integrally formed by vacuum forming modified PET sheet. The inner box 3, the limiting post 4, the third horizontal reinforcing rib 11, and the third mesh reinforcing rib 12 are integrally formed by vacuum forming high-density PP sheet. After the outer box 1, the box cover 2, and the inner box 3 are formed, the inner box 3 is simply inserted into the outer box 1 through the limiting post 4. The limiting post 4 can also be used as an insert to make an interference fit with the four corners of the inner side of the outer box 1 to prevent the inner box 3 from easily falling off. Then, the box cover 2 is fastened to the top of the outer box 1 and the inner box 3 to complete the assembly.
[0048] The inner box 3 and the outer box 1 are inlaid to form a double-layer structure. The presence of the limiting post 4 can ensure the distance between the inner box 3 and the outer box 1, preventing the inner box 3 from shaking at will. The outer box 1 is mainly used to withstand impact, friction and other damage, while the inner box 3 can store and protect food. If necessary, the inner box 3 can be taken out separately and placed in the microwave oven for secondary heating of food. The double-layer structure has a gap between the outer box 1 and the inner box 3 to form a buffer space, which increases the impact resistance. The outer box 1 is more likely to break while the inner box 3 remains intact, reducing the occurrence of food leakage. The presence of the buffer space reduces the contact area between the outer box 1 and the inner box 3, which increases the heat preservation performance.
[0049] The outer box 1 uses the first vertical reinforcing rib 5, the first horizontal reinforcing rib 6, and the first mesh reinforcing rib 7 to disperse stress, thereby increasing the deformation resistance of the outer box 1; the lid 2 uses the second vertical reinforcing rib 8, the second horizontal reinforcing rib 9, and the second mesh reinforcing rib 10 to disperse stress, thereby increasing the deformation resistance of the outer box 1; while the inner box 3 uses the third horizontal reinforcing rib 11 and the third mesh reinforcing rib 12 to disperse the bottom stress of the inner box 3, and the limiting post 4 can act as a vertical reinforcing rib to reinforce and disperse the stress on the four sides of the inner box 3, thereby increasing the deformation resistance of the outer box 1.
[0050] Both the outer box 1 and the lid 2 are made of modified PET, which has high strength, good impact resistance and toughness, and a certain degree of wear resistance. A food-grade two-component waterborne polyurethane coating is applied to the outer surface of both boxes. After curing, the coating forms a highly cross-linked network, increasing the wear resistance of the outer box 1 and lid 2 surface several times over. Coating only the outer surface has two advantages: first, scratches usually occur on the outer side, leaving the inner side unaffected by scratches, thus reducing costs and waste; second, the coating does not come into contact with food, further improving safety. Even if food spills and comes into contact with the coating, the two-component waterborne polyurethane coating, through chemical cross-linking, forms a dense coating that prevents unreacted monomers from migrating into the food, thus having no impact. The inner box 3 is made of high-density PP material, which has high tensile strength and rigidity, as well as good impact resistance and toughness. Furthermore, the heat resistance of high-density PP is much higher than that of modified PET or other packaging plastics, making it easy to reheat food in a microwave oven, satisfying both high strength and reheatability requirements. Both modified PET and high-density PP are recyclable, reducing resource waste and environmental pollution, making them more environmentally friendly.
[0051] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A deformation-resistant and wear-resistant blister box, comprising an outer box (1), characterized in that: The outer box (1) is connected to the inner box (3), and the inner box (3) has limit posts (4) fixed on both sides. The bottom of the inner box (3) is fixed with a third transverse reinforcing rib (11) and a third grid reinforcing rib (12). The top of the inner box (3) is connected to the lid (2).
2. The deformation-resistant and wear-resistant blister box according to claim 1, characterized in that: The outer box (1) has multiple first vertical reinforcing ribs (5) fixed on its outer surface, sides and back respectively, and the bottom of the outer box (1) has first horizontal reinforcing ribs (6) and first grid reinforcing ribs (7) fixed respectively.
3. The deformation-resistant and wear-resistant blister box according to claim 2, characterized in that: The outer surface, sides and back of the box cover (2) are respectively fixed with a number of second vertical reinforcing ribs (8), and the top of the box cover (2) is respectively fixed with a second horizontal reinforcing rib (9) and a second grid reinforcing rib (10).
4. The deformation-resistant and wear-resistant blister box according to claim 3, characterized in that: The first grid reinforcing rib (7), the second grid reinforcing rib (10) and the third grid reinforcing rib (12) are all inclined, and the inclination angle is 45°.
5. The deformation-resistant and wear-resistant blister box according to claim 1, characterized in that: The bottom of the limiting post (4) is in contact with the lower part of the inner side of the outer box (1).
6. The deformation-resistant and wear-resistant blister box according to claim 5, characterized in that: A gap is provided between the outer box (1) and the inner box (3).
7. The deformation-resistant and wear-resistant blister box according to claim 6, characterized in that: The side of the limiting post (4) is interference-fitted with the inside of the outer box (1), and the inside of the box cover (2) is interference-fitted with the top of the outer box (1) and the top of the inner box (3) respectively.
8. The deformation-resistant and wear-resistant blister box according to claim 2, characterized in that: The outer box (1), the lid (2), the first vertical reinforcing rib (5), the first horizontal reinforcing rib (6), the first grid reinforcing rib (7), the second vertical reinforcing rib (8), the second horizontal reinforcing rib (9), and the second grid reinforcing rib (10) are all made of modified PET material.
9. The deformation-resistant and wear-resistant blister box according to claim 1, characterized in that: The inner box (3), the limiting post (4), the third transverse reinforcing rib (11) and the third grid reinforcing rib (12) are all made of high-density PP material.
10. The deformation-resistant and wear-resistant blister box according to claim 8, characterized in that: The outer box (1), the lid (2), the first vertical reinforcing rib (5), the first horizontal reinforcing rib (6), the first mesh reinforcing rib (7), the second vertical reinforcing rib (8), the second horizontal reinforcing rib (9), and the second mesh reinforcing rib (10) are all coated with a food-grade two-component waterborne polyurethane coating.