Aluminum plastic film, shock absorber and vehicle

Abstract

The utility model discloses an aluminum plastic film, a shock absorber and a vehicle. The aluminum plastic film comprises a main body layer, the gas barrier layer is arranged on one side of the main body layer in the thickness direction, and the gas barrier layer comprises an ethylene-vinyl alcohol copolymer piece. According to the aluminum-plastic film disclosed by the utility model, the gas barrier property of the aluminum-plastic film is improved, and the service life of the aluminum-plastic film is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to an aluminum plastic film, shock absorber and vehicle. BACKGROUND

[0002] In the traditional technology, the aluminum plastic film is widely used as a soft packaging material in the packaging field of lithium batteries. With the rapid development of new energy vehicles, various functional parts made of aluminum plastic film are more and more widely used in the field of automobiles. Among them, the shock absorber with aluminum plastic film as the outer capsule skin and the inside filled with air is applied to the automobile shock absorber because it has smaller volume and the characteristics of fast compression oil storage and high sensitivity rebound oil supply compared with the traditional energy accumulator. During driving, the air bag in the shock absorber needs to be compressed and rebounded continuously and at high frequency to ensure the smoothness and comfort of the vehicle.

[0003] However, in the related art, the aluminum plastic film is easily leaked during high-frequency bending, which shortens the service life of the aluminum plastic film. SUMMARY

[0004] The utility model aims at solving one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide an aluminum plastic film, which improves the gas barrier property of the aluminum plastic film and prolongs the service life of the aluminum plastic film.

[0005] Another purpose of the utility model is to provide a shock absorber using the above-mentioned aluminum plastic film.

[0006] Still another purpose of the utility model is to provide a vehicle using the above-mentioned shock absorber.

[0007] According to the aluminum plastic film of the first aspect of the utility model, the gas barrier layer is set on one side of the thickness direction of the main body layer, and the gas barrier layer includes an ethylene-vinyl alcohol copolymer piece.

[0008] According to the aluminum plastic film of the utility model, the gas barrier layer is set on one side of the thickness direction of the main body layer, and the gas barrier layer includes an ethylene-vinyl alcohol copolymer piece.

[0009] According to some embodiments of the utility model, the thickness of the gas barrier layer is d1, wherein d1 satisfies 15 μm ≤ d1 ≤ 20 μm.

[0010] According to some embodiments of the utility model, the aluminum plastic film further includes a first isolation layer, which is arranged between the main body layer and the gas barrier layer.

[0011] According to some embodiments of the present application, the first isolation layer comprises a polyethylene terephthalate member.

[0012] According to some embodiments of the present application, the first isolation layer has a thickness d2, wherein the d2 satisfies: 20 μm≤d2≤25 μm.

[0013] According to some embodiments of the present application, the aluminum-plastic film further comprises a second isolation layer, which is arranged on a side of the main layer away from the first isolation layer.

[0014] According to some embodiments of the present application, the second isolation layer is the same as the first isolation layer.

[0015] According to some embodiments of the present application, the aluminum-plastic film further comprises a protective layer, which is arranged on a side of the gas barrier layer away from the main layer, and the protective layer comprises a polyamide member or an ethylene-tetrafluoroethylene copolymer member.

[0016] According to some embodiments of the present application, the protective layer has a thickness d3, wherein the d3 satisfies: 60 μm≤d3≤70 μm.

[0017] According to some embodiments of the present application, the aluminum-plastic film further comprises a heat-seal layer, which is arranged on the other side of the main layer in the thickness direction, and the heat-seal layer comprises a polybutylene terephthalate member or a polypropylene member.

[0018] According to some embodiments of the present application, the heat-seal layer has a thickness d4, wherein the d4 satisfies: 60 μm≤d4≤70 μm.

[0019] According to some embodiments of the present application, the main layer is an aluminum foil member.

[0020] According to some embodiments of the present application, the main layer has a thickness d5, wherein the d5 satisfies: 25 μm≤d5≤30 μm.

[0021] The shock absorber according to the second aspect of the present application comprises the aluminum-plastic film according to the first aspect of the present application.

[0022] The vehicle according to the third aspect of the present application comprises the shock absorber according to the second aspect of the present application.

[0023] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0025] Figure 1 is a schematic view of an aluminum-plastic film according to an embodiment of the present application;

[0026] Figure 2 is a schematic view of an aluminum-plastic film according to another embodiment of the present application.

[0027] Reference Signs:

[0028] 100, aluminum-plastic film;

[0029] 1, main layer; 2, gas barrier layer; 3, first separation layer;

[0030] 4, second separation layer; 5, protective layer; 6, heat-seal layer. DETAILED DESCRIPTION

[0031] Embodiments of the present application will be described in detail below, with reference to the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary, and the following description is made below with reference to Figure 1 and Figure 2 An aluminum-plastic film 100 according to an embodiment of the present application will be described below. In the following description, the aluminum-plastic film 100 is used for a shock absorber for illustration, but is not limited thereto.

[0032] As shown in Figure 1 and Figure 2 , the aluminum-plastic film 100 according to the first aspect of the present application includes a main layer 1 and a gas barrier layer 2.

[0033] Specifically, the gas barrier layer 2 is provided on one side in the thickness direction of the main layer 1, and the gas barrier layer 2 includes an ethylene-vinyl alcohol copolymer member. For example, in the example of Figure 1 and Figure 2 , the thickness direction of the gas barrier layer 2 is the up-down direction in Figure 1 and Figure 2 , the gas barrier layer 2 is located above the main layer 1, and the gas barrier layer 2 and the main layer 1 are stacked in the thickness direction of the main layer 1. The gas barrier layer 2 can be provided as an EVOH film (i.e., an ethylene-vinyl alcohol copolymer member).

[0034] Therefore, by setting the gas barrier layer 2 as an ethylene-vinyl alcohol copolymer piece (for example, an EVOH film), the EVOH film has excellent gas barrier property and excellent processability, so that the aluminum-plastic film 100 has high gas barrier property. In addition, the EVOH film has excellent properties such as transparency, gloss, mechanical strength, stretchability, wear resistance, cold resistance, and surface strength. When the aluminum-plastic film 100 is used for a shock absorber, both the normal oxygen permeability and the oxygen permeability after 500,000 times of bending are low, and the aluminum-plastic film 100 is not easy to leak when bent at a high frequency, which is beneficial to the long-term and stable use of the aluminum-plastic film 100, prolongs the service life of the aluminum-plastic film 100, and improves the use performance of the aluminum-plastic film 100.

[0035] According to the aluminum-plastic film 100 of the embodiment of the present application, by setting the gas barrier layer 2 as an ethylene-vinyl alcohol copolymer piece, the aluminum-plastic film 100 has high gas barrier property. When the aluminum-plastic film 100 is used for a shock absorber, the aluminum-plastic film 100 is not easy to leak when bent at a high frequency, which is beneficial to the long-term and stable use of the aluminum-plastic film 100, prolongs the service life of the aluminum-plastic film 100, and improves the use performance of the aluminum-plastic film 100.

[0036] According to some embodiments of the present application, the thickness of the gas barrier layer 2 is d1, wherein d1 satisfies: 15 μm≤d1≤20 μm. For example, when the thickness of the gas barrier layer 2 is less than 15 μm, the thickness of the gas barrier layer 2 is small, on the one hand, the gas barrier layer 2 is not easy to be uniformly formed on one side of the main layer 1, which increases the processing difficulty of the aluminum-plastic film 100. On the other hand, the gas barrier property of the gas barrier layer 2 is reduced, thereby reducing the use performance of the aluminum-plastic film 100. When the thickness of the gas barrier layer 2 is greater than 20 μm, the thickness of the aluminum-plastic film 100 is increased under the condition that the size of other layer structures of the aluminum-plastic film 100 is unchanged, which increases the processing cost of the aluminum-plastic film 100, and at the same time, the effect of improving the performance of the aluminum-plastic film 100 is weakened.

[0037] Therefore, by setting the thickness d1 of the gas barrier layer 2 to satisfy 15 μm≤d1≤20 μm, the processing difficulty of the aluminum-plastic film 100 is reduced, the gas barrier property of the aluminum-plastic film 100 is ensured, and at the same time, the use cost of the aluminum-plastic film 100 is reduced, which is more beneficial to the production, processing and use of the aluminum-plastic film 100.

[0038] According to some embodiments of the present application, in combination with Figure 1 and Figure 2 , the aluminum-plastic film 100 further comprises a first isolation layer 3, which is arranged between the main layer 1 and the gas barrier layer 2. For example, in Figure 1In the example, the main body layer 1, the first isolation layer 3 and the gas barrier layer 2 are stacked in the up-down direction. Thus, by arranging the first isolation layer 3, when the debris formed by the rupture of the main member punctures the gas barrier layer 1 which is an aluminum foil member, the first isolation layer 3 can effectively prevent the aluminum foil layer 2 from being punctured and damaged during the use of the aluminum-plastic film 100, so that the first isolation layer 3 has a good protective effect on the gas barrier layer 2, improves the use performance of the aluminum-plastic film 100, and further prolongs the service life of the aluminum-plastic film 100.

[0039] According to some embodiments of the present application, the first isolation layer 3 comprises a polyethylene terephthalate (PET) film. The PET film is a kind of comprehensive performance packaging film. It has good transparency, luster, good airtightness and aroma retention. In addition, the mechanical properties of the PET film are excellent, the tensile strength and impact strength are much higher than those of general films, and the film has good stiffness, dimensional stability, and is suitable for printing, paper bag and other secondary processing. The PET film also has excellent heat resistance, cold resistance, good chemical resistance and oil resistance. The relatively hard PET film can be used to coat the main body layer 1, which effectively prevents the debris of the main body layer 1 such as aluminum foil from damaging other film layers such as the gas barrier layer 2.

[0040] According to some embodiments of the present application, the thickness of the first isolation layer 3 is d2, wherein d2 satisfies: 20 μm≤d2≤25 μm.

[0041] For example, although the PET film can effectively prevent the puncture of the aluminum foil debris on the EVOH film, with the increase of the thickness of the first isolation layer 3 (for example, greater than 25 μm), the hardness and stiffness of the PET film itself will increase, and the flexibility will decrease, thereby cracks will be generated after high-frequency bending, and the protective effect on the gas barrier layer 2 will be reduced. The PET film with low thickness (for example, less than 20 μm) is not strong enough and cannot effectively resist the puncture of the aluminum foil debris, thereby reducing the protective effect on the gas barrier layer 2. Thus, when the thickness d2 of the first isolation layer 3 satisfies 20 μm≤d2≤25 μm, the thickness of the first isolation layer 3 is moderate, so that the protective effect of the first isolation layer 3 on the gas barrier layer 2 is better, thereby facilitating the long-term and stable use of the aluminum-plastic film 100.

[0042] According to some other embodiments of the present application, in combination with Figure 2 , the aluminum-plastic film 100 further comprises a second isolation layer 4 arranged on the side of the main body layer 1 away from the first isolation layer 3. For example, in Figure 2In the example, the upper and lower sides of the main layer 1 are respectively provided with the first isolation layer 3 and the second isolation layer 4, and the first isolation layer 3 and the second isolation layer 4 can be the same or different. Thus, through the joint action of the first isolation layer 3 and the second isolation layer 4, the two sides of the main layer 1 in the thickness direction are both covered, the first isolation layer 3 can well isolate the damage of the debris of the main layer 1 such as the aluminum foil to other film layers such as the gas barrier layer 2, and the second isolation layer 4 can isolate the damage of the debris of the main layer 1 such as the aluminum foil to the layer structure such as the heat sealing layer 6 located on the lower side of the main layer 1, so that the first isolation layer 3 and the second isolation layer 4 have a good protective effect on other layers of the aluminum-plastic film 100, further improving the use performance of the aluminum-plastic film 100, and further prolonging the service life of the aluminum-plastic film 100.

[0043] Optionally, the second isolation layer 4 is the same as the first isolation layer 3. For example, the first isolation layer 3 and the second isolation layer 4 are both PET films. In this way, the types of materials of the aluminum-plastic film 100 are reduced, and the production and processing of the aluminum-plastic film 100 are facilitated, thereby being more conducive to the processing and use of the aluminum-plastic film 100.

[0044] Further, the aluminum-plastic film 100 further comprises a protective layer 5, the protective layer 5 is arranged on the side of the gas barrier layer 2 away from the main layer 1, and the protective layer 5 comprises a polyamide member or an ethylene-tetrafluoroethylene copolymer member. For example, in the example of the aluminum-plastic film 100, the protective layer 5 is arranged on the side of the gas barrier layer 2 away from the main layer 1. Figure 1 and Figure 2 Further, the aluminum-plastic film 100 further comprises a protective layer 5, the protective layer 5 is arranged on the side of the gas barrier layer 2 away from the main layer 1, and the protective layer 5 comprises a polyamide member or an ethylene-tetrafluoroethylene copolymer member. For example, in the example of the aluminum-plastic film 100, the protective layer 5 is arranged on the side of the gas barrier layer 2 away from the main layer 1.

[0045] For example, the PA film has the advantages of wear resistance, toughness, drug resistance, heat resistance, cold resistance, easy forming, self-lubrication, non-toxicity, easy dyeing, and low oxygen permeability compared with the film of general materials. The ETFE film has strong physical and chemical stability, excellent impact resistance, and long stretching life. Thus, the protective layer 5 has a protective effect on the main layer 1, the gas barrier layer 2, and the like of the aluminum-plastic film 100, and can delay the aging of the aluminum-plastic film 100. Compared with this, the effect of using the ETFE film as the protective layer 5 is better than that of the PA film, and the ETFE film effectively improves the defects of the protective layer 5 that easily and slowly ages at room temperature and becomes brittle at high temperature, so that the protective layer 5 has a good protective effect on the aluminum-plastic film 100, improves the anti-aging performance of the aluminum-plastic film 100, is conducive to the long-term stable use of the aluminum-plastic film 100, and further prolongs the service life of the aluminum-plastic film 100.

[0046] According to some embodiments of the present application, the thickness of the protective layer 5 is d3, wherein d3 satisfies: 60um≤d3≤70um. For example, when the thickness of the protective layer 5 is less than 60um, the thickness of the protective layer 5 is relatively thin, and the protective effect of the protective layer 5 is reduced. When the thickness of the protective layer 5 is greater than 70um, the overall thickness of the aluminum-plastic film 100 is increased, and the use convenience of the aluminum-plastic film 100 is reduced. Therefore, by setting the thickness of the protective layer 5 as d3 satisfying 60um≤d3≤70um, the thickness of the protective layer 5 is reasonable, which is beneficial to the use performance of the protective layer 5, thereby improving the use performance of the aluminum-plastic film 100.

[0047] According to some embodiments of the present application, in combination with Figure 1 and Figure 2 , the aluminum-plastic film 100 further comprises a heat-sealing layer 6, the heat-sealing layer 6 is arranged on the other side of the thickness direction of the main body layer 1, and the heat-sealing layer 6 comprises a polybutylene terephthalate member or a polypropylene member.

[0048] For example, in the example of Figure 1 , the aluminum-plastic film 100 is sequentially arranged from top to bottom as the protective layer 5, the gas barrier layer 2, the first isolation layer 3, the main body layer 1 and the heat-sealing layer 6. In the example of Figure 2 , the aluminum-plastic film 100 is sequentially arranged from top to bottom as the protective layer 5, the gas barrier layer 2, the first isolation layer 3, the main body layer 1, the second isolation layer 4 and the heat-sealing layer 6. The polybutylene terephthalate can be arranged as a PBT film, and the polypropylene member can be arranged as a PP film. The PP film has high impact resistance, strong mechanical properties, and is resistant to a variety of organic solvents and acid and alkali corrosion. When the aluminum-plastic film 100 is used for a shock absorber, in order to prevent the air bag of the shock absorber from failing to leak gas at a temperature higher than 120℃ due to insufficient heat-sealing strength, a PBT film with a higher melting point is used instead of a PP film as the heat-sealing layer 6, which ensures that the edge sealing of the air bag has excellent sealing strength in a high-temperature environment. That is, compared with the PP film, the use performance of the PBT film is better, so that the sealing performance of the aluminum-plastic film 100 when connected with other components is higher, the connection strength is higher, the connection is more firm, and it is more beneficial to the long-term use of the aluminum-plastic film 100 in a high-temperature environment.

[0049] According to some embodiments of the present application, the thickness of the heat-sealing layer 6 is d4, wherein d4 satisfies: 60um≤d4≤70um. Therefore, by setting the thickness d4 of the heat-sealing layer 6 to satisfy: 60um≤d4≤70um, the thickness of the heat-sealing layer 6 is reasonable, which is more beneficial to the performance of the heat-sealing layer 6, and the peeling strength at room temperature and high temperature is relatively high, and the aluminum-plastic film 100 is not easy to fall off, thereby being more beneficial to the long-term use of the aluminum-plastic film 100.

[0050] According to some embodiments of the present application, the main layer 1 is an aluminum foil piece, and the thickness of the main layer 1 is d5, wherein d5 satisfies: 25 μm≤d5≤30 μm. Thus, the aluminum foil piece makes the main layer 1 have a certain structural strength, which is conducive to the molding of the aluminum-plastic film 100, and facilitates the processing and use of the aluminum-plastic film 100. In addition, when the thickness of the main layer 1 is less than 25 μm, the main layer 1 is relatively thin, which reduces the structural strength of the main layer 1 and the setting performance, thereby reducing the structural strength of the aluminum-plastic film 100 and being not conducive to the use and processing of the aluminum-plastic film 100. When the thickness of the main layer 1 is greater than 30 μm, the thickness of the main layer 1 increases, which increases the material amount of the main layer 1, thereby increasing the overall thickness of the aluminum-plastic film 100. At the same time, with the increase of the thickness of the main layer 1, the bending resistance decreases, and more debris is easily formed in the bending process, which increases the damage to other film layers. By setting the thickness of the main layer 1 to d5 to satisfy: 25 μm≤d5≤30 μm, the thickness of the main layer 1 is reasonable, which is conducive to the performance of the aluminum-plastic film 100, so as to be conducive to the use and processing of the aluminum-plastic film 100, and can reduce the production and processing cost of the aluminum-plastic film 100.

[0051] Optionally, the protective layer 5 and the gas barrier layer 2 are connected through a first adhesive layer, the gas barrier layer 2 and the first isolation layer 3 are connected through a second adhesive layer, and the second isolation layer 4 and the heat sealing layer 6 are connected through a third adhesive layer. When the aluminum-plastic film 100 does not include the second isolation layer 4, the first isolation layer 3 and the heat sealing layer 6 are adhered to the main layer 1 in a flow casting manner. When the aluminum-plastic film 100 includes the second isolation layer 4, the first isolation layer 3 and the second isolation layer 4 are adhered to the main layer 1 in a flow casting manner. For example, the first adhesive layer, the second adhesive layer and the third adhesive layer can be the same, different or partially the same, and can be set according to actual use requirements to better meet the actual application. In addition, through the setting of the first adhesive layer, the second adhesive layer and the third adhesive layer, the adhesion between the multiple layer structures of the aluminum-plastic film 100, such as the protective layer 5, the first isolation layer 3 and the second isolation layer 4, is facilitated, the connection is firm, and the long-term use of the aluminum-plastic film 100 is facilitated.

[0052] The aluminum-plastic film 100 of the present application has more flexibility and high bending fatigue degree, and realizes the functions of strong gas barrier property and high bending fatigue resistance. In the case of high-frequency bending, the aluminum foil has a gas barrier effect before breaking, and has good setting function after breaking and is continued to be applied to the composite film.

[0053] The embodiments of the present application are described in detail below, it should be noted that the embodiments described below are exemplary, only for explaining the present application, and can not be understood as limiting the present application. In addition, if not specifically stated, all reagents used in the following examples are commercially available, or can be synthesized according to the present text or known methods, and the reaction conditions not listed are also easily obtained by those skilled in the art.

[0054] The aluminum-plastic film 100 of the present application is described by way of example with specific embodiments in combination with comparative examples. The oxygen transmission rate test and heat-seal peel strength test of the aluminum-plastic film 100 of Examples 1-9 and Comparative Examples 1-3 are carried out as follows.

[0055] Among them, ASTM F1927 is used to test the oxygen transmission rate of the aluminum-plastic film 100, including normal oxygen permeability and oxygen permeability after 500,000 times of bending. GB / T2791-1995 is used to test the peel strength of the edge of the aluminum-plastic film 100, including room temperature peel strength and 120℃ peel strength.

[0056] Example 1

[0057] An aluminum-plastic film 100, from the outside to the inside, includes a protective layer 5, a gas barrier layer 2, a first isolation layer 3, a main body layer 1 and a heat-seal layer 6. The adjacent protective layer 5, gas barrier layer 2 and first isolation layer 3 are bonded together by an adhesive, and the first isolation layer 3 and the heat-seal layer 6 are bonded together with the main body layer 1 by a flow casting method.

[0058] Among them, the protective layer 5 is an ETFE film with a thickness of 65μm, the gas barrier layer 2 is an EVOH film with a thickness of 20μm, the first isolation layer 3 is a PET film, the thickness of the protective layer 5 is 25μm, the heat-seal layer 6 is a PBT film, the thickness of the heat-seal layer 6 is 70μm, and the main body layer 1 is an aluminum foil with a thickness of 25μm.

[0059] Example 2

[0060] The main difference from Example 1 is that the thickness of the first isolation layer 3 PET film is 40μm.

[0061] Example 3

[0062] The main difference from Example 1 is that the thickness of the first isolation layer 3 PET film is 15μm.

[0063] Example 4

[0064] The main difference from Example 1 is that the first isolation layer 3 is not set, the protective layer 5, the gas barrier layer 2 and the main body layer 1 are directly bonded together by an adhesive, and the heat-seal layer 6 is bonded together with the main body layer 1 by a flow casting method.

[0065] Example 5

[0066] The main difference from Example 1 is that the heat-seal layer 6 is a PP film.

[0067] Example 6

[0068] An aluminum-plastic film 100 comprises, from the outside to the inside, a protective layer 5, a gas barrier layer 2, a first separation layer 3, a main body layer 1, a second separation layer 4, and a heat-seal layer 6. Adjacent protective layer 5, gas barrier layer 2, first separation layer 3, second separation layer 4, and heat-seal layer 6 are bonded together by an adhesive. The first separation layer 3 and the second separation layer 4 protective layer 5 are bonded to the main body layer 1 in a flow-casting manner.

[0069] The protective layer 5 is a PA6 and PA66 mixed film with a thickness of 65 μm, the gas barrier layer 2 is an EVOH film with a thickness of 20 μm, the first separation layer 3 is a PET film with a thickness of 25 μm, the main body layer 1 is an aluminum foil with a thickness of 25 μm, the second separation layer 4 is a PET film with a thickness of 25 μm, and the heat-seal layer 6 is a PP film with a thickness of 70 μm.

[0070] Example 7

[0071] The main difference from Example 6 is that the first separation layer 3 PET film has a thickness of 40 μm.

[0072] Example 8

[0073] The main difference from Example 1 is that the first separation layer 3 PET film has a thickness of 15 μm.

[0074] Example 9

[0075] The main difference from Example 1 is that the first separation layer 3 is not provided, and the protective layer 5, the gas barrier layer 2, the main body layer 1, and the heat-seal layer 6 are directly bonded together by an adhesive.

[0076] Comparative Example 1

[0077] The main difference from Example 1 is that the gas barrier layer 2 is not provided. Adjacent protective layer 5 and first separation layer 3 are bonded together by an adhesive. The first separation layer 3 and the heat-seal layer 6 are bonded to the main body layer 1 in a flow-casting manner.

[0078] Comparative Example 2

[0079] The main difference from Example 6 is that the gas barrier layer 2 is not provided. Adjacent protective layer 5, first separation layer 3, second separation layer 4, and heat-seal layer 6 are bonded together by an adhesive. The first separation layer 3 and the second separation layer 4 protective layer 5 are bonded to the main body layer 1 in a flow-casting manner.

[0080] Comparative Example 3

[0081] The main difference between Example 4 is that the material of the gas barrier layer 2 is PP film.

[0082] The test results of Examples 1-9 and Comparative Examples 1-3 are shown in Tables 1 and 2.

[0083] Table 1 Gas barrier test results of the aluminum-plastic film of the examples and comparative examples under normal state and after 0.5 million times of 90-degree bending

[0084]

[0085] Table 2 Edge peeling strength test results of the aluminum-plastic film of the examples and comparative examples under normal temperature and 120°C

[0086]

[0087]

[0088] As shown in Table 1, the oxygen permeation rates of Examples 1-9 and Comparative Examples 1-3 under normal state are almost the same, which should be that the aluminum foil of the main layer 1 is not broken and damaged under normal state, and can play a good barrier role to oxygen. After 0.5 million times of bending, the oxygen permeation rates of Example 4 and Example 9 are significantly higher than those of other examples, which indicates that the optimal scheme of the aluminum-plastic film 100 is to simultaneously provide the gas barrier layer 2 and the first isolation layer 3, or simultaneously provide the gas barrier layer 2, the first isolation layer 3 and the second isolation layer 4, which indicates that the first isolation layer 3 and the second isolation layer 4 can also well block the puncture damage of the aluminum foil debris to the EVOH gas barrier layer 2, thereby well ensuring that the oxygen permeation rate is still very low after 0.5 million times of bending.

[0089] Through the verification of Example 2, Example 3, Example 7 and Example 8, the first isolation layer 3 and the second isolation layer 4 are in the best state of protecting the aluminum foil debris when the thickness is 20-25 μm, and the possible reason is that although the PET film can effectively block the puncture of the aluminum foil debris to the EVOH film, with the increase of the thickness, the hardness and rigidity of the PET film itself will rise, and the flexibility will decrease, thereby cracks will be generated after high-frequency bending, and the PET film cannot form a good protection to the aluminum foil debris. The low-thickness PET film cannot resist the puncture of the aluminum foil debris and is broken. Therefore, the optimal thickness of the PET film is 20-25 μm.

[0090] Comparative Example 1 and Comparative Example 2, without the gas barrier layer 2, the oxygen permeability after 500,000 times of bending is much larger than that with the gas barrier layer 2. As compared with Example 4 and Comparative Example 3, it can be seen that the gas barrier effect of the EVOH film is better than that of the PP film. By adding the EVOH film, the defect that the conventional aluminum plastic film 100 does not have the gas barrier effect due to the broken and fragmented aluminum foil after high-frequency bending is well overcome, and the aluminum plastic film 100 of the application still has very low oxygen permeability after high-frequency bending.

[0091] As can be seen from Table 2, the 120℃ peeling strength of Example 5-9 and Comparative Example 2 is significantly lower than that of other examples and comparative examples, which proves that the effect of using PBT film for the heat sealing layer 6 is better than that of using PP film. The PBT film has better high-temperature resistance than the PP film, and the edge sealing peeling strength is significantly improved at 120℃.

[0092] The shock absorber (not shown in the figure) according to the second aspect of the application comprises the aluminum plastic film 100 according to the first aspect of the application.

[0093] The shock absorber according to the second aspect of the application adopts the aluminum plastic film 100 described above, the aluminum plastic film 100 has strong high-temperature resistance, bending resistance, aging resistance and high gas barrier performance, thereby improving the use performance of the shock absorber and prolonging the service life of the shock absorber.

[0094] The vehicle according to the third aspect of the application comprises the shock absorber according to the second aspect of the application.

[0095] The vehicle according to the third aspect of the application adopts the shock absorber described above, thereby improving the use performance of the vehicle.

[0096] Other configurations and operations of the shock absorber and the vehicle according to the embodiments of the application are known to those skilled in the art and will not be described in detail here.

[0097] In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0098] In the description of the utility model, the meaning of "multiple" is two or more than two.

[0099] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0100] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An aluminum laminate film characterized by comprising: Comprising: a main layer; a gas barrier layer provided on one side in the thickness direction of the main layer, the gas barrier layer including an ethylene-vinyl alcohol copolymer piece, the thickness of the gas barrier layer being d1, wherein the d1 satisfies: 15 μm ≤ d1 ≤ 20 μm.

2. The aluminum laminate film according to claim 1, characterized by Further comprising: a first separation layer provided between the main layer and the gas barrier layer.

3. The aluminum laminate film according to claim 2, characterized by The first separation layer includes a polyethylene terephthalate piece.

4. The aluminum laminate film according to claim 2, characterized by The thickness of the first separation layer is d2, wherein the d2 satisfies: 20 μm ≤ d2 ≤ 25 μm.

5. The aluminum laminate film according to claim 2, wherein Further comprising: a second separation layer provided on the side of the main layer away from the first separation layer.

6. The aluminum laminate film according to claim 5, wherein The second separation layer is the same as the first separation layer.

7. The aluminum laminate film according to claim 1, wherein Further comprising: a protective layer provided on the side of the gas barrier layer away from the main layer, the protective layer including a polyamide piece or an ethylene-tetrafluoroethylene copolymer piece.

8. The aluminum laminate film according to claim 7, characterized by The thickness of the protective layer is d3, wherein the d3 satisfies: 60 μm ≤ d3 ≤ 70 μm.

9. The aluminum laminate film according to claim 1, wherein Further comprising: a heat-seal layer provided on the other side in the thickness direction of the main layer, the heat-seal layer including a polybutylene terephthalate piece or a polypropylene piece.

10. The aluminum laminate film according to claim 9, wherein The thickness of the heat-seal layer is d4, wherein the d4 satisfies: 60 μm ≤ d4 ≤ 70 μm.

11. The aluminum laminate film according to claim 1, wherein The main layer is an aluminum foil piece.

12. The aluminum laminate film according to any one of claims 1 to 11, wherein The thickness of the main layer is d5, wherein the d5 satisfies: 25 μm ≤ d5 ≤ 30 μm.

13. A shock absorber characterized by Comprising the aluminum-plastic film according to any one of claims 1-12.

14. A vehicle characterized by comprising: Comprising the shock absorber according to claim 13.

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