Paper air cushion

Abstract

The utility model relates to the technical field of cushion packaging, in particular to a paper air cushion. The paper air cushion provided by the utility model comprises an upper layer and a lower layer, and the peripheries of the upper layer and the lower layer are enclosed to form an air chamber and an inflation channel; the air inflation channel is provided with an air inflation opening, and the air inflation channel is arranged on one side of the air chamber and communicated with the air chamber. The paper air cushion provided by the utility model has excellent buffering and shockproof effects.

Description

Technical Field

[0001] The utility model relates to the technical field of cushioning packaging, in particular to a paper air cushion. Background Art

[0002] Because the middle of the air cushion film is filled with gas, on the one hand, it has good elasticity, can prevent shock and reduce wear, ensuring that the product is not damaged during transportation, stacking and loading and unloading; on the other hand, it is light in weight and uses less than foam plastic, which can save packaging and transportation costs; and it is easy to process and can be designed and used according to the requirements of different products. Therefore, it is widely used in the packaging of household appliances, etc. Utility Model Content

[0003] In order to solve the deficiencies of paper air cushions in the prior art, the utility model provides a paper air cushion.

[0004] The technical solutions provided by this utility model are as follows:

[0005] A paper air cushion comprises an upper layer and a lower layer, wherein the peripheries of the upper layer and the lower layer enclose an air chamber and an inflation channel; an inflation port is provided on the inflation channel, and the inflation channel is arranged on one side of the air chamber and communicated with the air chamber.

[0006] In one embodiment, the upper layer and the lower layer both include a film layer and a kraft paper layer, and the film layer includes, from the outside to the inside, a stacked adhesive barrier layer, a support layer, and a heat-sealing layer, and the melting temperature of the material used for the support layer is higher than that of the heat-sealing layer.

[0007] In one embodiment, the width of the inflation port is 1.0 cm-5.0 cm.

[0008] In one embodiment, the air chamber includes a plurality of air channels arranged at intervals; each of the air channels includes a plurality of interconnected air cavities.

[0009] In one embodiment, when viewed from above, the line connecting the centers of the three closest air cavities in two adjacent columns of the air cavities forms an isosceles triangle, and the base of the isosceles triangle is the line connecting the centers of two air cavities in the same column of air cavities.

[0010] In one embodiment, the diameter of the air cavity is between 1.0 cm and 3.0 cm, and the height of the air cavity after inflation is less than 2.0 cm.

[0011] In one embodiment, when viewed from above, the lines connecting the centers of the three closest air cavities in two adjacent columns of the air cavities form an equilateral triangle.

[0012] In one embodiment, the diameter of the air cavity is 3.5 cm-5.0 cm, and the height of the air cavity after inflation is less than 3 cm.

[0013] In one embodiment, the number of the airways is an even number.

[0014] In one embodiment, the air passage is connected to the inflation passage through an air intake passage, and the air intake passage is a tapered structure that gradually becomes smaller from the outside to the inside, with the outer end of the air intake passage being a large-diameter end and the inner end of the air intake passage being a small-diameter end.

[0015] Based on the above, the paper air cushion provided by the utility model has an excellent shockproof effect.

[0016] Other features and benefits of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other benefits of the present invention can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work. The positional relationships described in the drawings in the following description are based on the directions of the components shown in the diagrams, unless otherwise specified.

[0018] Figure 1 A schematic diagram of the planar structure of a paper air cushion provided in one embodiment of the present utility model;

[0019] Figure 2 A schematic diagram of the film structure of a paper air cushion provided in one embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the planar structure of a paper air cushion provided in another embodiment of the present invention;

[0021] Figure 4 for Figure 3 A magnified schematic diagram of the structure at center A;

[0022] Figure 5 A schematic diagram of the three-dimensional structure of an inflated paper air cushion provided by another embodiment of the present invention;

[0023] Figure 6 This is a partial structural diagram of a modified example of the utility model;

[0024] Figure 7 A schematic side view of the inflated paper air cushion provided by another embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the planar structure of a paper air cushion provided in yet another embodiment of the present invention;

[0026] Figure 9 A schematic diagram of the three-dimensional structure of a paper air cushion provided in another embodiment of the present invention;

[0027] Figure 10 This is a side structural schematic diagram of a paper air cushion after inflation provided by another embodiment of the present invention.

[0028] Reference numerals:

[0029] 10. Upper layer; 11a. Adhesive barrier layer; 11b. Support layer; 11c. Heat-sealing layer; 20. Lower layer; 30. Air chamber; 31. Air channel; 31a, 31b, 31c, air cavity; 40. Inflation channel; 41. Inflation port. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have meanings consistent with the meanings of these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present invention.

[0032] The utility model provides a paper air cushion.

[0033] Please refer to Figure 1An embodiment of the present invention provides a paper air cushion, including an upper layer 10 and a lower layer 20. The upper layer 10 and the lower layer 20 can be circular or polygonal, and can be designed and used according to the requirements of different products. The periphery of the upper layer 10 and the lower layer 20 is enclosed to form an air chamber 30 and an inflation channel 40. It can be understood that the periphery of the upper layer 10 and the lower layer 20 can be enclosed by adhesive materials or by heat sealing to form a certain space and divide the air chamber 30 and the inflation channel 40; an inflation port 41 is provided on the inflation channel 40, and the inflation channel 40 is provided on one side of the air chamber 30 and is connected to the air chamber 30.

[0034] In this embodiment, the paper air cushion comprises an upper layer 10 and a lower layer 20. The edges of the upper and lower layers 10, 20 are heat-sealed to form an air chamber 30 and an inflation channel 40. The inflation channel 40 is provided with an inflation port 41 for external air to enter the inflation channel 40. The inflation channel 40 is located on one side of the air chamber 30 and communicates with the air chamber 30. Air is then inflated into the air chamber 30 through the inflation channel 40. After inflation, the space between the upper and lower layers 10, 20 is filled with air. During use, the air chamber 30 is filled with air, giving the paper air cushion its elasticity and cushioning properties. Moreover, the surface of the paper air cushion is soft, which can prevent the packaged items from being damaged or scratched, and it is light in weight and uses less than foam plastics, which can save packaging and transportation costs. Preferably, the bubble height of the air chamber 30 after inflation is below 5 cm, and the bubble height can specifically be 5.0 cm, 4.5 cm, 4.0 cm, 3.5 cm, 3.0 cm, 2.5 cm, 2.0 cm, 1.5 cm, 1.0 cm, 0.5 cm, etc., or a point value between any two of the above points. Flexible control of the bubble height can adapt to the shockproof requirements of different products.

[0035] In some preferred embodiments, in order to solve the problem of the difficulty in balancing the biodegradability and barrier properties of paper air cushion products in the prior art, the upper layer 10 includes a film layer 11 and a kraft paper layer 12, and the lower layer 20 includes a film layer 21 and a kraft paper layer 22; for example, the upper layer 11 is taken as an example, please refer to Figure 2The film layer 11 includes, from the outside to the inside, a stacked adhesive barrier layer 11a, a support layer 11b, and a heat-sealing layer 11c. The melting temperature of the material used in the support layer 11b is higher than that of the heat-sealing layer 11c, to ensure that the support layer 11b will not be broken by heat when the heat-sealing layer 11c softens and heat-seals. The adhesive barrier layer 11a has a barrier and air-retaining function, and at a certain temperature, the surface material of the film layer 11 can be softened and sticky by rolling and heating, and adhered to the surface kraft paper layer 12. The film layer 11 can adopt, for example, an air cushion film described in the patent application document "An Air Cushion Film, Barrier Paper Air Cushion, and Their Preparation Methods" with application number 202411484522.3. The air cushion film not only has biodegradable properties but also has a barrier and air-retaining effect that is no less than that of nylon, or adopts other existing technologies or commonly used biodegradable air cushion films with high barrier properties on the market.

[0036] Specifically, the adhesive barrier layer 11a comprises plastic particles coated with talc. The plastic particles are composed of PPC, PBAT, and a molecular entanglement agent. The molecular entanglement agent is primarily composed of a high-molecular-weight acrylic copolymer, specifically PVDC, SAN, PAN, or other materials. Mechanical stirring or ultrasonication is used to disperse an oil phase mixture into tiny oil droplets, forming a stable water-in-oil (W / O) or oil-in-water (O / W) emulsion. Under certain conditions (such as heating, light, or radiation), an initiator triggers a polymerization reaction of monomers in the oil droplets, forming polymer chains. As the polymerization reaction proceeds, the polymer chains gradually deposit on the surface of the oil droplets, forming a dense shell.

[0037] The method for preparing the bonding barrier layer 11a component comprises the following steps:

[0038] Step 1: Add PPC, PBAT and molecular entanglement agent into a high-speed mixer in a certain proportion, with a stirring frequency of 20-25 Hz and a stirring time of 3-5 minutes.

[0039] It should be noted that the high-speed mixer cannot be heated in this step. Preferably, circulating cooling water can be used to maintain the temperature below 35°C.

[0040] Step 2: After the mixture is stirred, pour it into the hopper of the twin-screw extruder.

[0041] Among them, the temperature setting of the modification machine is as follows:

[0042] Table 1

[0043] Feeding section Heating section 1 Heating section 2 Heating section 3 Compression section 4 80℃ 110-120℃ 120-130℃ 120-130℃ 120-130℃ Heating section 5 Heating section 6 Extrusion section die head 120-130℃ 120-130℃ 120-130℃ 120-130℃

[0044] Among them, the modified bracing rods are cooled by air to avoid water absorption by the material;

[0045] Step 3: After pelletizing, the pellets are put into a mixing bucket. It is preferred to preheat a certain proportion of talcum powder in the mixing bucket and stir while pelletizing to coat the surface of the pellets to prevent the pellets from sticking together.

[0046] Step 4: After mixing, bag.

[0047] The supporting layer 11b mainly provides stiffness and heat-sealing resistance for the film layer 10. In order to ensure that the film has good flatness during the bag making process, the film layer 10 needs a certain stiffness so that the film is not easily wrinkled or deformed during stretching.

[0048] The components of the support layer 11b include PBAT, PLA, activated calcium carbonate, a molecular entanglement agent and calcium stearate.

[0049] The preparation method of the support layer 11b component comprises the following steps:

[0050] Step 1: Add PLA, PBAT, molecular entanglement agent, calcium carbonate and calcium stearate into a high-speed mixer in a certain proportion, set the temperature at 80-85°C, the stirring frequency at 20-25Hz, and the stirring time at 5-10min.

[0051] Step 2: After the mixture is stirred, pour it into the hopper of the twin-screw extruder.

[0052] Among them, the temperature setting of the modification machine is as follows:

[0053] Table 2

[0054] Feeding section Heating section 1 Heating section 2 Heating section 3 Compression section 4 100℃ 120-130℃ 130-140℃ 130-140℃ 130-140℃ Heating section 5 Heating section 6 Extrusion section die head Heating section 5 130-140℃ 130-140℃ 130-140℃ 130-140℃ 130-140℃

[0055] Among them, the modified brazing strips are cooled by air to prevent the material from absorbing water;

[0056] Step 3: After granulation, pack into bags.

[0057] Compared to the support layer 11b, the heat-sealing layer 11c needs to have a lower softening point and better heat-sealing properties. Therefore, no fillers are added to the film layer. Furthermore, in the production rewinding position, to ensure adhesion between the kraft paper and the film surface, the material is rolled by steel wheels at 120-140°C. To ensure that the product surface softens without affecting the film layer, the film layer needs to have a certain softening temperature.

[0058] The components of the heat-sealing layer 11c include PBAT, PBST, and a lubricant.

[0059] The preparation method of the heat-sealing layer 11c component comprises the following steps:

[0060] Step 1: Add PBST, PBAT and lubricant into a high-speed mixer in a certain proportion without heating, stirring at a frequency of 20-25 Hz and for 5-10 minutes;

[0061] Step 2: Mix the ingredients and put them into bags.

[0062] The method for preparing the thin film layer 11 comprises the following steps:

[0063] Provide materials for the adhesive barrier layer 11a, support layer 11b, and heat seal layer 11c. Add the above materials sequentially into the hopper of a three-layer co-extrusion film blowing machine, set the interlayer ratio, set the film blowing temperature, and keep the temperature for 2 hours before film blowing. The specific temperature settings are as follows:

[0064] Table 3

[0065]

[0066]

[0067] The sources of raw materials used in the embodiments of the present invention are as follows, but not limited to the following raw materials: PPC is selected from the brand Zhongke Jinlong, brand T4; PBAT is selected from the brand Xinjiang Tunhe, brand th801; molecular entanglement agent is selected from the brand Mitsui Chemicals; PLA is selected from the brand Fengyuan, brand 804; silane coupling agent for activation is selected from the brand Jiangxi Guangyuan; calcium stearate is selected from the brand Huamingtai; PBST is selected from the brand Sinopec; and intercalated acid amide is selected from the brand Jiangxi Weike.

[0068] In addition, unless otherwise specified, the raw materials used may also be conventional commercial products in the art, or may be prepared by conventional methods in the art.

[0069] The material used for the kraft paper layer 12 is kraft paper.

[0070] In a preferred embodiment, the width of the inflation port is between 1.0cm and 5.0cm. Specifically, the width of the inflation port can be 1.0cm, 1.5cm, 2.0cm, 2.5cm, 3.0cm, 3.5cm, 4.0cm, 4.5cm, 5.0cm, etc., or a point value between any two of the above. Based on the use of the paper air cushion and the size of the air chamber 30, the width of the inflation port 41 is limited to the range of 1.0cm-5.0cm. This can avoid low inflation efficiency due to a small inflation port, or an excessively large inflation port that occupies too much paper air cushion space, thereby reducing the area of the air chamber 30 and reducing the effective use area of the paper air cushion.

[0071] Please refer to Figure 3Another embodiment of the present invention provides a paper air cushion, comprising an upper layer 10 and a lower layer 20, wherein the periphery of the upper layer 10 and the lower layer 20 encloses an air chamber 30 and an inflation channel 40; an inflation port 41 is provided on the inflation channel 40, and the inflation channel 40 is provided on one side of the air chamber 30 and communicates with the air chamber 30. The air chamber 30 includes a plurality of air channels 31 spaced apart. By providing the air chamber 30 with a plurality of spaced apart air channels 31, when one of the air channels 31 leaks, the other air channels 31 can still be used normally to maintain the cushioning function of the paper air cushion. Each of the air channels 31 includes a plurality of interconnected air cavities, and the structure of the air cavity can be a circular structure, a triangular structure, an elliptical structure, a regular n-gon structure (n>3), etc., preferably a circular structure. The curvature of the circular structure is gentle and uniform, which can effectively avoid wrinkles formed due to sudden changes in curvature and maintain the overall aesthetics and stability of the structure.

[0072] In this embodiment, reference Figures 3 to 5 , viewed from above, the line connecting the centers of the three closest air cavities 31a, 31b, and 31c in two adjacent columns of the air cavity forms an isosceles triangle. The isosceles triangle distribution can increase the air cavity area per unit area of the paper air cushion, making the distribution and arrangement of the air cavities more reasonable, improving the shock absorption coverage of the air cushion, and at the same time providing better shock absorption support for the wrapped product. The base L of the isosceles triangle is the line connecting the centers of the two air cavities 31a and 31c in the same column of air cavities. This structural design can make the arrangement of the air cavities in each air channel 31 separated by the heat joint line under this type of specification more compact, thereby achieving a better shock absorption effect.

[0073] It should be noted that if the air cavity is a circular structure, the center is the center of the circular structure. If the air cavity structure is a triangle (refer to Figure 6 ), if the air cavity structure is a regular polygon structure, then the center is the center of the ellipse, that is, the midpoint of the two foci of the ellipse. If the air cavity structure is a regular n-gon structure, then the center is the circumcenter, that is, the center of the circumscribed circle.

[0074] On the basis of this embodiment, in some preferred embodiments, the diameter of the air cavity corresponding to the structure is 1.0cm-3.0cm. The diameter of the air cavity can be specifically 1.0cm, 1.5cm, 2.0cm, 2.5cm, 3.0cm, etc., or any point value between two of the above. For the air cavity within this diameter size range, due to its small diameter, it is easily affected by the width of the heat sealing line, resulting in uneven distribution of the air cavity. Therefore, the isosceles triangle distribution is adopted in combination with the design structure in which the line connecting the centers of the two air cavities 31a and 31c in the same column of air cavities is the bottom side of the isosceles triangle, so that the paper air cushion can achieve better shockproof effect. Preferably, refer to Figure 7The bubble height of the air chamber 30 after inflation is below 2.0 cm. The bubble height can be 2.0 cm, 1.5 cm, 1.0 cm, 0.5 cm, etc., or a point value between any two of the above points. Flexible control of the bubble height can adapt to different product shockproof requirements.

[0075] Please refer to Figure 8 and Figure 9 Another embodiment of the present invention provides a paper air cushion, comprising an upper layer 10 and a lower layer 20, wherein the peripheries of the upper layer 10 and the lower layer 20 enclose an air chamber 30 and an inflation channel 40; an inflation port 41 is provided on the inflation channel 40, and the inflation channel 40 is provided on one side of the air chamber 30 and communicates with the air chamber 30, wherein the air chamber 30 includes a plurality of air channels 31 arranged at intervals, and by providing the air chamber 30 with a plurality of separated air channels 31, each of the air channels 31 includes a plurality of interconnected air cavities.

[0076] In this embodiment, reference Figure 8 , viewed from above, the lines connecting the centers of the three closest air cavities 31a, 31b, and 31c in two adjacent columns of the air cavity form an equilateral triangle; the equilateral triangle air cavity distribution can make the paper air cushion have a better shockproof effect, thereby providing more comprehensive protection for the product.

[0077] Based on this embodiment, in some preferred embodiments, the diameter of the air cavity is 3.5cm-5.0cm, and the diameter of the air cavity can be 3.5cm, 4.0cm, 4.5cm, 5.0cm, etc., or any point value between the above two. Figure 10 The bubble height of the air chamber 30 after inflation is below 3.0 cm. The bubble height can be 3.0 cm, 2.5 cm, 2.0 cm, 1.5 cm, 1.0 cm, 0.5 cm, or any value between the above two points. Flexible control of the bubble height can meet the shockproof requirements of different products. Preferably, the number of the air channels is an even number to provide better support.

[0078] Based on this embodiment, in some preferred embodiments, the air duct is connected to the inflation channel through an air inlet channel, and the air inlet channel is a tapered structure that becomes smaller from the outside to the inside. The outer end of the air inlet channel is a large-diameter end, and the inner end of the air inlet channel is a small-diameter end. The air inlet channel with this tapered structure can, on the one hand, effectively ensure the smooth flow of air intake, and on the other hand, can adapt to air cavities of different diameters, thereby providing a guarantee for processing paper air cushions of different air cavity sizes and meeting their inflation requirements.

[0079] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background art at the same time. Those skilled in the art should understand that the absence of any content in a claim should not be construed as a limitation on that claim.

[0080] Although terms such as upper layer, adhesive barrier layer, support layer, heat-sealing layer, lower layer, air chamber, airway, air cavity, inflation channel, and inflation port are frequently used herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A paper air cushion, characterized in that: It comprises an upper layer and a lower layer, the peripheries of the upper layer and the lower layer enclose an air chamber and an inflation channel; an inflation port is provided on the inflation channel, and the inflation channel is provided on one side of the air chamber and communicated with the air chamber.

2. The paper air cushion according to claim 1, characterized in that The upper layer and the lower layer both include a film layer and a kraft paper layer. The film layer includes, from the outside to the inside, a stacked adhesive barrier layer, a support layer and a heat-sealing layer. The melting temperature of the material used for the support layer is higher than that of the heat-sealing layer.

3. The paper air cushion according to claim 2, characterized in that: The width of the inflation port is 1.0 cm-5.0 cm.

4. The paper air cushion according to any one of claims 1 to 3, characterized in that: The air chamber includes a plurality of air channels arranged at intervals; each of the air channels includes a plurality of interconnected air cavities.

5. The paper air cushion according to claim 4, characterized in that: When viewed from above, the line connecting the centers of the three closest air cavities in two adjacent columns of the air cavities forms an isosceles triangle, and the base of the isosceles triangle is the line connecting the centers of two air cavities in the same column of air cavities.

6. The paper air cushion according to claim 5, characterized in that The diameter of the air cavity is 1.0 cm-3.0 cm, and the height of the air cavity after inflation is less than 2.0 cm.

7. The paper air cushion according to claim 4, characterized in that When viewed from above, the lines connecting the centers of the three closest air cavities in two adjacent columns of the air cavities form an equilateral triangle.

8. The paper air cushion according to claim 7, characterized in that The diameter of the air cavity is 3.5 cm to 5.0 cm, and the height of the air cavity after inflation is below 3.0 cm.

9. The paper air cushion according to claim 7, characterized in that The number of the airways is an even number.

10. The paper air cushion according to claim 7, characterized in that The air channel is connected to the inflation channel through an air intake channel. The air intake channel is a tapered structure that becomes smaller from outside to inside. The outer end of the air intake channel is a large-diameter end, and the inner end of the air intake channel is a small-diameter end.

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