CN1689799A - Low heat loss multi-layer air chamber plastic cloth - Google Patents

Abstract

A plastic cloth with a multi-layer air chamber and low heat loss. In order to provide an agricultural covering material which can effectively reduce heat energy loss, has low cost and long service life, the invention provides a covering material which comprises at least three layers of first base films which are arranged at intervals and second base films which are respectively arranged between any two adjacent first base films; the second base film defines a plurality of first air chambers between two adjacent first base films, and the first air chambers are not communicated with each other and are respectively filled with inert gas; the other second base film defines a plurality of second air chambers between one of the two adjacent layers of the first base films which define the first air chambers and the other first base film, and the plurality of second air chambers are not communicated with each other and are respectively filled with greenhouse effect gases; the first air chambers on the same plane define at least one thermal resistance layer, and the second air chambers on the same plane define at least one thermal effect layer.

Description

Low heat loss multi-layer air chamber plastic cloth

technical field

The invention belongs to agricultural covering materials, in particular to a plastic cloth with multiple layers of air chambers with low heat loss.

Background technique

With the advancement of science and technology, crops that were only abundant in a specific season in the past can now be planted and harvested in all seasons, mainly due to the extensive use of covering insulation materials in agricultural greenhouses, tunnel sheds and horticultural work to provide suitable growth conditions. The crops that cannot be cultivated can advance or delay the production date, thereby increasing the yield and improving the quality. At present, the common covering materials on the market can be mainly divided into two categories: glass and plastic.

As shown in Figure 1, the insulating glass plates 1 used to cover the greenhouse frame (not shown) are mostly arranged at double-layer intervals, and the space between the glass plates 1 is filled with air, or it can be a relatively expensive vacuum treatment. Since the glass plate 1 itself has the function of blocking heat convection and can achieve a partial heat preservation effect, and there is air with low heat conduction efficiency between the glass plates 1, and even vacuum treatment can cut off heat energy from a part of the glass plate 1 in a conduction manner. transfer from one side to the other.

Other relevant practitioners choose to install air-conditioning equipment in the greenhouse to ensure the stability of the temperature inside the greenhouse. However, it is less than ideal because the insulation effect between the air and the glass plate is not yet complete. In addition, the weight of the glass plate is too heavy, so it must rely on a frame with extremely high structural strength to carry it. The difficulty and challenge, and the cost of the glass plate 1 is high. If the area of the greenhouse is too large, the overall construction cost will be very staggering. In addition, if the air-conditioning equipment is used for long-term operation, it will undoubtedly be a burden for the industry. a heavy burden.

In view of this, the relevant industry is gradually turning to cover materials made of plastic products. Common plastic products can be divided into polyethylene (PE), polyvinyl chloride (PVC) and other materials. The biggest feature is light and thin texture and light transmission. Good and waterproof. However, due to the fact that most of them are laid in a single layer in actual use, the single layer of plastic covering material is often too light and thin to effectively prevent the loss of heat energy escaping outside at night, thus losing the function of heat insulation.

In addition, it is known that plastic covering materials usually become brittle after being used for 12 to 18 months. Generally, the industry usually chooses to replace the new plastic covering materials before the covering materials become brittle. At the same time, it causes In addition to the large increase in the amount of waste, and the purchase and laying costs for each replacement are unavoidable, there are currently quite a few agricultural experts who are investing in related fields, hoping to create the most practical, and Cost-effective commercial product.

Contents of the invention

The object of the present invention is to provide a low-heat loss multi-layer air chamber plastic cloth that can effectively reduce heat energy consumption, has low cost and long service life.

The present invention comprises at least three first base films arranged at intervals and a second base film respectively arranged between any two adjacent first base films; the second base film is between two adjacent first base films Several first air chambers are defined, and the several first air chambers are not communicated with each other and are respectively filled with inert gas; another second base film is placed on one of the two adjacent first base films that define the first air chamber Several second air chambers are defined between the other first base film, and the several second air chambers are not communicated with each other and are respectively filled with greenhouse effect gases; the first air chambers located on the same plane jointly define at least one layer The thermal blocking layer and the second air chamber located on the same plane jointly define at least one thermal effect layer.

in:

A low-emissivity film is arranged outside the first base film located in one of the outermost layers.

The inert gas filled in the first gas chamber is argon or krypton.

The greenhouse gas filled in the second chamber is ozone.

The first air chambers on the same plane jointly define several layers of thermal blocking layers respectively located on opposite sides of the thermal effect layer.

The heat effect layer is several layers of heat effect layers respectively located between several layers of heat blocking layers.

The second air chambers on the same plane jointly define several layers of thermal effect layers respectively located on opposite sides of the thermal blocking layer.

The heat blocking layer is several layers of heat blocking layers respectively located between several layers of heat effect layers.

The first air chambers located on the same plane jointly define several layers of heat blocking layers, and the second air chambers located on the same plane jointly define several layers of thermal effect layers, which are arranged in a staggered manner.

The two layers are respectively located on the outside of the outermost first base film and provided with a reinforcement film.

A reflective film is arranged on the outside of the low-emissivity film.

Each of the first and second air chambers has a honeycomb-shaped cross-section, and any one of the first air chambers partially overlaps with three adjacent second air chambers located above, and any second air chamber overlaps with the three adjacent second air chambers located below. Three adjacent first air chambers form a partial overlap.

A matte film is provided on the outside of the first base film which is one of the outermost layers.

The first and second base films are multi-layer co-extruded composite films that do not contain chlorine and bromine on the surface.

The multi-layer co-extruded composite film is formed by laminating and co-extruding at least two of ethylene-vinyl acetate copolymer, polyvinylidene chloride, ethylene-vinyl alcohol copolymer and silicon oxide.

Because the present invention comprises the first base film that at least three layers are arranged at intervals and the second base film that is respectively arranged between any two adjacent first base films; Several first air chambers are defined between them, and the several first air chambers are not communicated with each other and are respectively filled with inert gas; another second base film is between two adjacent layers of first base films that define the first air chambers Several second air chambers are defined between one and the other first base film, and the several second air chambers are not communicated with each other and are respectively filled with greenhouse effect gases; the first air chambers located on the same plane jointly define at least one The thermal blocking layer and the second air chamber located on the same plane jointly define at least one thermal effect layer. The invention is suitable for covering the greenhouse frame, the upper part is the external environment, and the lower part is the space surrounded and isolated by the low-heat-loss multiple-layer air chamber plastic cloth. During the daytime, sunlight irradiates from the external environment and passes through the invention to heat all objects and air in the space, so that the temperature in the space rises. At night, the ambient temperature drops rapidly in the absence of sunlight. According to the second law of thermodynamics, the direction of heat transfer is from a place with a higher temperature to a place with a lower temperature, that is, from the space to the external environment. The heat energy is continuously emitted from the space to the external environment through the present invention. However, when the thermal energy in the space radiates outward, it first enters the thermal blocking layer and contacts the inert gas. Since the inert gas is the gas with the lowest heat conduction efficiency in nature, the inertness in the thermal blocking layer Gas is not easy to use as a medium for transferring heat energy, and only a very small part of heat energy can continue to dissipate. Even if a small amount of heat energy is smoothly emitted to the outside by the inert gas and enters the thermal effect layer, the greenhouse effect gas in the thermal effect layer can still absorb heat energy and then radiate back into the space, so the heat energy that can finally pass through the thermal effect layer and radiate to the external environment In order to achieve the purpose of the lowest heat energy consumption; and the gas molecules in the first and second air chambers cannot produce thermal convection, and maintain a stable static wind state, so the temperature in the space will not decrease due to the drop of the external environment temperature. the rapid decrease. Not only can the heat energy consumption be effectively reduced, but also the cost is low and the service life is long, so as to achieve the purpose of the present invention.

Description of drawings

Fig. 1, the schematic cross-sectional view of the known glass plate structure used to cover the greenhouse frame.

Fig. 2 is a schematic cross-sectional view of the structure of Embodiment 1 of the present invention.

Fig. 3 is a schematic top view of the structure of Embodiment 1 of the present invention.

Fig. 4 is a schematic sectional view of the structure of Embodiment 2 of the present invention.

Fig. 5 is a schematic sectional view of the third embodiment of the present invention.

Detailed ways

Embodiment one

As shown in Fig. 2 and Fig. 3, the low heat loss multi-layer air chamber plastic cloth 2 of the present invention comprises three layers of first base films 21, 21', 21" spaced up and down, and the two layers are respectively bent and arranged on two adjacent second base films. A base film 21 , 21 ′ and a second base film 22 , 22 ′ between 21 ′, 21 ′ and a low-emissivity film 23 outside the first base film 21 of one of the two outermost layers.

The first and second base films 21, 21', 21", 22, 22' are respectively multi-layer co-extrusion composite films that do not contain chlorine and bromine on the surface layer, and the multi-layer co-extrusion composite films are selected from ethylene-vinyl acetate copolymer ( At least two of EVA), polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH) and silicon oxide are laminated and co-extruded. In this embodiment, the multi-layer co-extruded composite film is made of ethylene- Vinyl acetate copolymer, polyvinylidene chloride and ethylene-vinyl alcohol copolymer are layered and co-extruded, and polyvinylidene chloride should be located in the middle rather than the outermost layer.

The second base film 22 defines several first air chambers 24 between the adjacent first base films 21, 21', and the several first air chambers 24 are not communicated with each other and are respectively filled with inert gas. In this embodiment The inert gas is argon or krypton. The first base film 21' that defines one of the first air chambers 24 and the adjacent first base film 21" are defined by another second base film 22' to define several second air chambers 25. The two second air chambers 25 are not communicated with each other and are respectively filled with greenhouse effect gas. In this embodiment, the greenhouse effect gas is ozone.

The first air chambers 24 on the same plane jointly define the thermal blocking layer 26 , and the second air chambers 25 on the same plane jointly define the thermal effect layer 27 . The thermal blocking layer 26 is relatively adjacent to the low-E film 23 than the thermal effect layer 27, and in this embodiment the low-E film 23 is made of nanoscale potassium titanate whiskers (K ₂ Ti ₆ O ₁₂ ), of course Other materials with the same effect are also allowed.

As shown in FIG. 3 , the cross-sections of each first air chamber 24 and each second air chamber 25 are honeycomb-shaped, and any one of the first air chambers 24 and three adjacent second air chambers located above 25 form a partial overlap, and any second air chamber 25 forms a partial overlap with three adjacent first air chambers 24 located below.

As shown in Figure 2, the low-heat-damage multi-layer air chamber plastic cloth 2 of the present invention is suitable for covering on the greenhouse frame (not shown in the figure), the top of the low-heat-loss multi-layer air chamber plastic cloth 2 is the external environment 3, and the bottom is It is the space 4 surrounded and isolated by the plastic cloth 2 with multiple layers of air chambers with low heat loss. During the daytime, sunlight irradiates from the external environment 3 through the plastic cloth 2 with low heat loss multi-layer air chamber (as shown by the imaginary line arrow on the left in the figure), to heat all objects in the space 4, including the air of course, so that the space 4 temperature rise in .

At night, the temperature of the external environment 3 decreases rapidly in the absence of sunlight.

According to the second law of thermodynamics, the direction of heat transfer is from higher temperature to lower temperature, of which 10-15% is transferred by convection, 30-50% by conduction, and 30-50% by radiation. It accounts for about 50-60%. Therefore, more than half of the thermal energy tends to be transmitted from the space 4 to the external environment 3 by means of radiation (as indicated by the imaginary line arrow on the right side of the figure).

Based on the principle of 'black body radiation', that is, any object whose temperature is higher than the absolute temperature will emit energy in the form of radiation. Therefore, the heat energy accumulated in the space 4 and the heat energy emitted by the crops planted in the space 4 are also called Infrared rays are continuously emitted from the space 4 to the external environment 3 through the plastic cloth 2 with multiple layers of air chambers with low heat loss.

However, when the thermal energy in the space 4 radiates outward, it will first encounter the low-emissivity film 23, and the temperature in the space 4 is preset between 0-60°C, according to Wien's Law[ Wavelength (μm)=2897/(n°C+273.15)] is converted, and the wavelength of this section falls in the range of 8.7-10.6 μm, and the low-emissivity film 23 has an extremely excellent reflection effect on infrared rays in this range of wavelengths, and can Part of the heat energy is reflected back into the space 4 , and part of the heat energy not reflected back into the space 4 by the radiation film 23 enters the thermal blocking layer 26 .

When heat energy enters the thermal blocking layer 26, it will come into contact with the inert gas. Since the inert gas is the gas with the lowest heat transfer efficiency in nature, the thermal conductivity of argon is about 4.9×10 ^-5 cal/(cm ² ·sec·℃), which is the same as that of air Of course, krypton gas is also a good choice, its thermal conductivity is about 2.6×10 ^-5 cal/(cm ² ·sec·℃), which is 0.04 times that of air, but krypton gas is limited by the current price. For mass production, argon is still the best choice. In this way, the inert gas in the thermal blocking layer 26 is not easy to be used as a medium for transferring heat energy, and only a very small part of heat energy can continue to dissipate.

Even if a small amount of heat energy is smoothly emitted to the outside by the inert gas and enters the heat effect layer 27 , the greenhouse gas in the heat effect layer 27 can still absorb heat energy and radiate back into the space 4 . The main reason for choosing ozone as the greenhouse effect gas in this embodiment is that ozone has a particularly strong absorption phenomenon in the infrared region, especially the region centered on 9.6 μm, so the interception effect of ozone on radiant heat energy is used, and Store the radiant heat energy and then radiate it back into the space 4 to achieve the actual greenhouse effect.

In addition, according to the records in the literature, the regular hexagonal honeycomb space in nature has low heat radiation loss, so the special space design of the first and second air chambers 24 and 25 can also reduce the heat loss, so that the heat energy Unable to escape to the external environment 3. Cooperate with the present invention to control the height of each of the first and second air chambers 24, 25 below 6-9mm, gas molecules cannot produce heat convection phenomenon at a certain limited height, and maintain a stable static wind state, so the space in the space 4 The temperature will not decrease rapidly thereupon due to the drop in temperature of the external environment 3 .

In this embodiment, as the external temperature gradually drops, heat energy flows upward (i.e. the external environment 3) from the bottom (i.e. the space 4) of the low-heat loss multi-layer air chamber plastic cloth 2. The cloth 2 itself blocks heat energy convection, and is blocked by the low-e film 23 in the process of heat radiation, and reflects most of the heat energy back into the space 4, and a very small part of the heat energy passing through the low-e film 23 will be successively Encountering the thermal blocking layer 26 and the thermal effect layer 27, the inert gas filled in the thermal blocking layer 26 has an extremely low heat conduction effect, so that most of the heat energy passing through the low-emissivity film 23 cannot pass through the thermal blocking layer 26 by conduction , cooperate with the greenhouse effect gas in the heat effect layer 27 to absorb the heat energy from the heat block layer 26 and radiate it back to the heat block layer 26, and finally return to the space 4, so it can pass through the heat effect layer 27 and radiate to the external environment 3 heat energy is negligible, to achieve the lowest heat energy loss purpose.

In addition, because each first air chamber 24 and each second air chamber 25 are honeycomb-shaped, it can also assist in reducing heat radiation loss, and any two first and second air chambers 24, 25 at different heights are incomplete. Overlapping, even if the thickness of the plastic cloth 2 with multiple layers of air chambers with low heat loss is relatively thin, the overall structural strength can be improved by the first and second air chambers 24 and 25 arranged alternately.

In addition, it is noteworthy in the present invention that each of the first and second base films 21, 21', 21", 22, 22' is made of ethylene-vinyl acetate copolymer, polyvinylidene chloride and ethylene-vinyl alcohol copolymer The three polymers are co-extruded, so its barrier property is better than that of general single-layer plastic covering products. Of course, it can also be selected from ethylene-vinyl acetate copolymer, polyvinylidene chloride, ethylene-vinyl alcohol copolymer And at least two of silicon oxide are co-extruded, and other materials with barrier effect are also good choices, and as the types of materials selected increase, each of the first and second base films 21, 21', 21", 22 , The barrier effect of 22' will also increase accordingly.

Furthermore, ozone is a gas molecule that is extremely active and carries free electrons, and it is likely to dissolve and infiltrate each of the first and second base films 21, 21', 21", 22, 22'. The durability and safety of the chamber plastic cloth 2, so one of the raw materials-polyvinylidene chloride, which is made of the first and second base films 21, 21', 21", 22, 22', should be used in the co-extrusion process. It is located in the middle rather than the outermost layer, so as to prevent ozone from reacting directly with the chlorine atoms in polyvinylidene chloride, resulting in damage to the first and second base films 21, 21', 21", 22, 22' Infiltration, thereby shortening the service life of the plastic cloth 2 with low heat loss multi-layer air chamber.

Embodiment two

As shown in Figure 4, the low-heat-loss multiple-layer air-chamber plastic cloth 5 of the present invention is roughly equivalent to Embodiment 1 of the present invention, and it is special in that the low-heat-loss multi-layer air-chamber plastic cloth 5 of the present invention is formed with two layers of thermal effect layers 57, 57 ′ and the thermal blocking layer 56 between the two thermal effect layers 57 , 57 ′, so that the two thermal effect layers 57 , 57 ′ are located on opposite sides of the thermal blocking layer 56 respectively. The low heat loss multi-layer air chamber plastic cloth 5 further includes two layers of reinforcement films 58 located outside the outermost first base film 51 . The reinforcement film 58 is made of nylon 6, of course, nylon 1212 is also a suitable material choice. The present invention can also form two thermal blocking layers and a thermal effect layer between the two thermal blocking layers, so that the two thermal blocking layers are located on opposite sides of the thermal effect layer respectively.

Due to the increase in the design of each strengthening film 58, the structural support strength and tensile strength can be improved; and outside the original thermal effect layer 57, another layer of thermal effect layer 57' is formed, and the thermal blocking layer 56 is located between the two layers. Between the thermal effect layers 57, 57', although the thermal blocking layer 56 and the two layers of thermal effect layers 57, 57' are arranged in a staggered arrangement, it can also reduce the proportion of thermal energy dissipating outward, and due to the formation of the thermal effect layer 57' , for the slight thermal energy from the thermal blocking layer 56 to produce an overall effect of additive reflection.

Embodiment three

As shown in FIG. 5 , the low heat loss multi-layer air chamber plastic cloth 6 of the present invention forms three layers of thermal blocking layers 66 and four layers of thermal effect layers 67 , 67 ′. The same as the third embodiment of the present invention is that the three layers of thermal blocking layer 66 are located between the lower two layers of thermal effect layers 67 and the upper two layers of thermal effect layers 67', and the lower two layers of thermal effect layers 67 are relatively adjacent to the space 4, and the upper two layers of thermal effect layers The thermal effect layer 67 ′ is relatively adjacent to the external environment 3 . It is also possible to make several layers of heat-effect layers respectively located between several layers of heat-blocking layers. It is also possible to make several layers of thermal blocking layers and several layers of thermal effect layers alternately arranged.

The low-heat loss multi-layer air chamber plastic cloth 6 further includes a reflective film 69 located outside the low-emissivity film 63 to reflect light, and a rough film 60 located outside the first base film 61 that is closest to one of the external environments 3 . The reinforcement film 68 is located between the first base film 61 and the rough film 60 which are closest to one of the external environments 3 .

Before the thermal energy advances to the low-emissivity film 63, it will be reflected back in the space 4 by the reflective film 69 at first, so that the thermal energy that can enter the low-emissivity film 63 by the reflective film 69 is just greatly reduced, and after being received by the low-emissivity film 63 Under the obstruction of the three layers of thermal blocking layer 66, the lower two layers of thermal effect layer 67 and the upper and lower layers of thermal effect layer 67' are stacked up and down, so that the three layers of thermal blocking layer 66, the lower two layers of thermal effect layer 67' can be smoothly passed through The thermal energy of the thermal effect layer 67 and the upper two layers of thermal effect layers 67' is very low, and the heat conduction efficiency is partially reduced every time the thermal energy passes through one of the layers. The layers 67' can also be arranged in a staggered manner, which can also reduce the heat conduction efficiency.

The most special feature of this embodiment is that the total surface area of light incident can be increased by the rough film 60, so that the third embodiment of the present invention has a low-heat-damage multi-layer air chamber plastic cloth 6 that can absorb more light during the daytime than the first and second embodiments of the present invention. Sunlight is introduced into the space 4, and the temperature in the space 4 is rapidly increased. Before the sunlight is irradiated again in the next day, the rough film 60 can transfer the trace heat energy from each heat blocking layer 66, thermal effect layer 67, 67′ to the outside. Divergence, the larger surface area of the rough film 60 assists the heat energy to scatter to the surroundings more quickly, so the three embodiments of the present invention are especially suitable for cold zone areas, and quickly absorb heat energy into the space 4 during the day to increase the temperature in the space 4. After sunset, the The small amount of heat energy transmitted from the space 4 can dissolve the snow accumulated on the plastic cloth of the low heat loss multilayer air chamber 6, preventing the snow from being heavily pressed on the plastic cloth of the low heat damage multilayer air chamber to destroy its structural strength and tension. In addition, since part of the heat energy is reflected back into the space 4 , the air adjacent to the reflective film 69 is not easy to condense on the reflective film 69 due to too low temperature, resulting in condensation and moisture dripping.

To sum up the above, the low heat loss multi-layer air chamber plastic cloth of the present invention increases the time required for heat transfer by the change of the heat transfer medium between the thermal barrier layer and the thermal effect layer, and achieves three ways of greatly isolating heat energy transfer: conduction, Convection and radiation, combined with the reinforcement film and the air chamber structure stacked up and down, improve the structural strength of the low heat loss multi-layer air chamber plastic cloth of the present invention, and add rough film and reflective film according to the use status, so it is reliable The invention can achieve the purpose of reducing heat energy loss.

Claims (15)

1. A low heat loss multiple-layer air chamber plastic cloth, characterized in that it includes at least three first base films arranged at intervals from each other and a second base film respectively arranged between any two adjacent first base films; The second base film defines several first air chambers between two adjacent layers of the first base film, and the several first air chambers are not communicated with each other and are respectively filled with inert gas; the other second base film defines the first air chambers Several second air chambers are defined between one of the adjacent two layers of the first base film and the other first base film in one air chamber, and the several second air chambers are not connected to each other and are respectively filled with greenhouse effect gases; The first air chambers located on the same plane jointly define at least one thermal blocking layer, and the second air chambers located on the same plane jointly define at least one thermal effect layer. 2. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that a low-emissivity film is arranged outside the first base film located in one of the outermost layers. 3. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the inert gas filled in the first air chamber is argon or krypton. 4. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the greenhouse effect gas filled in the second air chamber is ozone. 5. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the first air chambers located on the same plane jointly define several layers of thermal barriers located on opposite sides of the heat effect layer. layer. 6. The low heat loss multi-layer air chamber plastic cloth according to claim 5, characterized in that the heat effect layer is several layers of heat effect layers respectively located between several layers of heat blocking layers. 7. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the second air chambers located on the same plane jointly define several layers of thermal effect on opposite sides of the heat blocking layer. layer. 8. The low heat loss multi-layer air chamber plastic cloth according to claim 7, characterized in that said heat blocking layer is several layers of heat blocking layers respectively located between several layers of heat effect layers. 9. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the first air chambers on the same plane jointly define several layers of thermal barrier layers and the second air chambers on the same plane. The air chambers jointly define several layers of heat effect layers which are arranged in a staggered manner. 10. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the two layers are respectively provided with reinforcement films outside the outermost first base film. 11. The low heat loss multi-layer air chamber plastic cloth according to claim 2, characterized in that a reflective film is provided on the outside of the low-emissivity film. 12. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the cross-section of each of the first and second air chambers is honeycomb-shaped, and any one of the first air chambers is in the same position as the The upper three adjacent second air chambers form a partial overlap, and any second air chamber forms a partial overlap with the lower three adjacent first air chambers. 13. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that a matte film is provided on the outside of one of the first base films located in the outermost layer. 14. The low heat loss multilayer air chamber plastic cloth according to claim 1, characterized in that the first and second base films are multi-layer co-extruded composite films whose surface layers do not contain chlorine and bromine. 15. The low heat loss multi-layer air chamber plastic cloth according to claim 1, characterized in that the multi-layer co-extruded composite film is selected from the group consisting of ethylene-vinyl acetate copolymer, polyvinylidene chloride, ethylene-vinyl alcohol At least two of the copolymer and silicon oxide are layered and co-extruded.

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