CN218966334U - Composite film material for warehouse and warehouse - Google Patents

Abstract

The utility model provides a composite membrane material for a warehouse and the warehouse. The composite membrane material for the warehouse comprises a metal barrier layer and a PVC membrane material which are sequentially laminated; the metal barrier layer comprises a metal foil layer bonded to the PVC film; the metal barrier layer further comprises a PET layer and a PE layer which are sequentially laminated on one side, far away from the PVC membrane, of the metal foil layer. The composite membrane material can realize high barrier and prevent mice from biting.

Description

Composite film material for warehouse and warehouse

Technical Field

The utility model relates to the field of membrane materials in engineering structures, in particular to a composite membrane material for a warehouse and the warehouse.

Background

The granary main body in the prior art basically adopts a brick-concrete structure or a brick-wood structure or a metal structure, and an auxiliary structure is required to be designed independently for solving the technical problems of mildew resistance, fog resistance (tide resistance), insect prevention, ageing resistance, rat resistance and the like in the grain storage field, so that the granary structure is more and more complicated, the construction is time-consuming and labor-consuming, the cost is high, and the granary is difficult to be suitable for families of farmers. With rural land circulation, more and more large households are planted with grains, and more grains such as harvested rice are also harvested; due to the lack of proper grain storage tools, many grains are directly piled on the ground, namely 'groveling grains', which causes the loss of mildew, mouse gnawing and the like. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the utility model and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a composite membrane material and a warehouse, wherein the composite membrane material is used as a main material of a containing cavity of a warehouse such as a granary, and can improve the moistureproof and mildewproof capabilities of the warehouse.

According to a first aspect of the utility model, there is provided a composite membrane comprising a metal barrier layer and a PVC membrane laminated in this order, the PVC membrane being prepared using a polyester fiber mesh as a substrate.

According to one embodiment of the utility model, the metal barrier layer comprises a metal foil layer bonded to the PVC film; the thickness of the metal foil layer is not less than 10 micrometers.

According to one embodiment of the present utility model, the metal foil layer is an aluminum foil layer, a copper foil layer, an iron foil layer, or a tin foil layer.

According to one embodiment of the utility model, the metal foil layer is bonded with the PVC film material through a glue layer; the glue of the glue layer is mixed glue of polyester resin and ethyl acetate, and the thickness of the glue layer is 5-10 microns.

According to one embodiment of the utility model, the metal barrier layer further comprises a PET layer and a PE layer which are sequentially laminated on one side of the metal foil layer away from the PVC film material.

According to one embodiment of the utility model, the PE layer has a thickness of 80 to 100 microns and the PET layer has a thickness of 10 to 20 microns.

According to one embodiment of the utility model, the PVC membrane comprises a PVC sandwich mesh cloth layer and a surface treatment layer positioned on one side of the PVC sandwich mesh cloth layer away from the metal barrier layer.

According to one embodiment of the utility model, the material of the surface treatment layer comprises polyvinylidene fluoride or polymethyl methacrylate.

According to one embodiment of the present utility model, the thickness of the surface treatment layer is not less than 5 grams per square meter.

According to one embodiment of the utility model, the PVC sandwich mesh layer comprises a surface PVC adhesive layer, a polyester fiber mesh and a bottom PVC adhesive layer which are arranged in a stacked manner.

According to one embodiment of the utility model, the top PVC glue layer and the bottom PVC glue layer contain a rodenticide.

According to one embodiment of the utility model, in the surface PVC glue layer and the bottom PVC glue layer, the mass content of the rodenticide is between 0.5% and 5.0%.

According to a second aspect of the present utility model there is provided a warehouse having a composite film as described above.

According to one embodiment of the utility model, the warehouse is a barn or a fresh-keeping warehouse.

The beneficial effects are as follows:

(1) The utility model forms a storage or a containing cavity of a granary by utilizing the high-barrier composite membrane material, is applied to a storage which needs to be blocked with gas and moisture in the internal storage, and is applied to a storage which needs to be blocked with gas and moisture in the internal storage.

(2) According to some embodiments, the composite membrane material provided by the utility model is used as a membrane material of a warehouse or a granary accommodating cavity, the warehouse is not required to be built in a brick-concrete structure, a brick-wood structure, a metal structure and the like, and auxiliary structures are not required to be designed for the functions of mildew resistance, moisture resistance, rat resistance, insect resistance, ageing resistance and the like of warehouses (such as grains or fruits and vegetables), so that the cost of the warehouse is reduced, and the composite membrane material can be applied to the granary or a fresh-keeping warehouse, and can be used as a membrane material of the accommodating cavity and used for the warehouse with the internal storage needing barrier gas and moisture.

(3) According to some embodiments, the composite membrane material has long service life, can be used for at least 20 years without damage, has the rat-proof and insect-proof capability, avoids damage of the composite membrane material caused by the biting of rats, and has low storage environment requirements.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic view of a laminated structure of a composite film according to an embodiment of the present utility model.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present utility model and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not intended to limit the number of their objects.

The embodiment of the utility model provides a composite membrane material and a warehouse adopting the composite membrane material, in particular to a granary or a fresh-keeping warehouse adopting the composite membrane material.

Referring to fig. 1, the composite film includes a metal barrier layer XA and a PVC (polyvinyl chloride) film XB which are sequentially laminated. In one embodiment of the present disclosure, the PVC film is prepared using a polyester fiber mesh as a substrate. In the composite membrane material of the embodiment of the utility model, the metal barrier layer XA can play a role in isolating air and moisture on one side of the composite membrane material from entering the other side, and is applied to a warehouse to prevent air and moisture outside the warehouse from penetrating into the warehouse, so that the environment in the warehouse has higher stability. Especially when the warehouse is a granary, the metal barrier layer XA can prevent external air and moisture from entering the granary, thereby being beneficial to moisture and mildew prevention of grains in the granary.

In one example, in a warehouse or component thereof, the metal barrier layer XA may be oriented inboard (e.g., toward the inside of the warehouse or toward the inside of the component), and the PVC film XB may be oriented outboard of the warehouse or component thereof.

In some embodiments of the utility model, the metal barrier layer XA comprises a metal foil layer 3, the metal foil layer 3 being bonded to the PVC film XB. In this way, the dense metal foil layer 3 can be used to closely arrange metal molecules, and the gaps are smaller, so that the two sides of the barrier composite film material, such as the air on the two sides of the barrier composite film material, can be mutually permeated.

Alternatively, the metal in the metal foil layer 3 may be a metal simple substance or a metal alloy, for example, the metal foil layer 3 may be any one of an aluminum foil layer, a copper foil layer, an iron foil layer, a tin foil layer, and the like. In one embodiment of the present utility model, the metal foil layer 3 is an aluminum foil layer, a copper foil layer, an iron foil layer, or a tin foil layer to reduce the cost of the metal foil layer 3. In one example, the metal foil layer 3 is an aluminum foil layer.

Optionally, the thickness of the metal foil layer 3 is not less than 10 micrometers, so that the composite film has good air blocking capability. Through a large number of tests, when the thickness of the metal foil layer 3 is not less than 10 micrometers, the blocking effect of the composite film material on air reaches more than 99 percent.

In one example, the metal foil layer 3 has a thickness of 10 to 20 microns (e.g., 10 microns, 12 microns, 14 microns, 16 microns, 18 microns, or 20 microns). Thus, the thickness of the metal foil layer 3 can be reduced as much as possible to reduce the cost, weight and thickness of the composite film while ensuring the gas barrier effect of the metal barrier layer XA.

In one embodiment of the present utility model, the metal foil layer 3 and the PVC film material XB are bonded together by a glue layer 4. In one example, the glue of the glue layer 4 is a mixed glue of polyester resin and ethyl acetate.

Further, the glue of the glue layer 4 is a mixed glue of high molecular weight polyester resin and ethyl acetate. Of course, the glue used for the glue layer 4 may be any other kind of glue.

In one example, the thickness of the glue layer 4 is 5-10 micrometers (e.g. 5 micrometers, 7.5 micrometers, 10 micrometers) so that the glue layer 4 has good weather resistance, UV (ultraviolet) resistance and good adhesion.

In one embodiment of the present utility model, the metal barrier layer XA further includes a PE layer (polyethylene layer) 1 located on a side of the metal foil layer 3 remote from the PVC film material XB, and the PE layer 1 is connected to the metal foil layer 3 through the PET layer (polyethylene terephthalate layer) 2. In other words, the metal barrier layer XA further includes a PET layer 2 and a PE layer 1 sequentially laminated on the side of the metal foil layer 3 remote from the PVC film material XB. Thus, the PET layer 2 and the PE layer 1 can provide protection for the metal foil layer 3, so that the service life of the composite film material and the barrier effect on gas are improved.

In the embodiment of the present utility model, it was found through a large number of experiments that the thickness of the PE layer 1 is not less than 80 μm and the thickness of the PET layer 2 is not less than 10 μm, a good protective effect can be provided for the metal barrier layer XA. Thus, in embodiments of the present utility model, the thickness of the PE layer 1 may be no less than 80 microns and the thickness of the PET layer 2 may be no less than 10 microns. In one example, the PE layer 1 has a thickness of 80 to 100 microns (e.g., 80 microns, 90 microns, or 100 microns) and the PET layer 2 has a thickness of 10 to 20 microns (e.g., 10 microns, 15 microns, or 20 microns). Thus, the PE layer 1 and the PET layer 2 have smaller thickness while ensuring the protection effect on the metal foil layer 3, and the cost, weight and thickness of the composite film material can be reduced.

In one embodiment of the present utility model, the metal barrier layer XA may be prepared by the following method: the PET layer 2 is bonded to the metal foil layer 3, and then the PE layer 1 is bonded to the PET layer 2 (on the surface of the PET layer away from the metal foil layer 3). Thus, the obtained metal barrier layer XA includes the metal foil layer 3, the PET layer 2, and the PE layer 1, which are laminated in this order.

In one embodiment of the utility model, the PET layer 2 and the metal foil layer 3 are bonded together by polyurethane glue and glue cured.

In one embodiment of the utility model, the PET layer 2 and PE layer 1 are bonded together by polyurethane glue and glue cured.

In one embodiment of the utility model, the PVC membrane XB comprises a PVC sandwich cloth layer and a surface treatment layer 8 which is positioned on one side of the PVC sandwich cloth layer away from the metal barrier layer. The surface treatment layer 8 may have high abrasion resistance and stain resistance so that it has an antifouling self-cleaning effect. Of course, the surface treatment layer 8 may have weather resistance and mold resistance, not limited to the above characteristics, and may be determined according to the requirements of the application.

In one embodiment of the utility model, the PVC membrane material can be provided with a rodenticide, for example, the PVC sandwich cloth layer can be provided with the rodenticide, and the rodenticide can stimulate oral mucosa and gustatory nerves of a murine animal to cause the murine animal to get rid of chewing, so that the purpose of rodenticide is realized; for example, the odor of a rodenticide can dislike rodents and repel them. Thus, the composite membrane material has the rat-proof capability. In some cases, rodenticides may also have an insect-repellent effect, for example, to prevent termite gnawing. Thus, the composite membrane material has insect-proof capability.

In the composite membrane material of the embodiment, the surface treatment layer 8 is arranged on one side, far away from the metal barrier layer XA, of the PVC sandwich mesh layer, and the surface treatment layer 8 can prevent the PVC sandwich mesh layer from being exposed and prevent the odor of the rodenticide in a safe distance from being transferred to an operator to cause uncomfortable symptoms such as the operator is pungent and tears. The surface treatment layer 8 does not influence the odor of the rodenticide to be transferred to the surface of the composite membrane material; when animals such as mice approach the composite membrane material, the animals can be stimulated by the rodenticide and cannot bite the composite membrane material, so that the composite membrane material has the rodenticide expelling capacity, the damage of the composite membrane material caused by the biting of mice is avoided, the requirement on the storage environment is low, and the composite membrane material can be used for at least 20 years without damage. Meanwhile, the surface treatment layer 8 can prevent the rodenticide from being exposed, so that the skin is prevented from being stimulated and damaged when people touch the rodenticide. Therefore, the composite membrane material improves the safety of the composite membrane material to operators and warehouses and can achieve the effect of rat repelling and preventing by arranging the surface treatment layer.

When the composite membrane material is applied to a warehouse, the warehouse also has the rat-proof and insect-proof capabilities. The rat-proof effect of the internal space of the warehouse is improved, and the damage risk of the warehouse can be reduced by avoiding the biting of rats, so that the storage in the warehouse is protected, and the damage of rats is avoided; the damage of the metal barrier layer XA is avoided due to the rat bite prevention of the warehouse membrane material, so that the composite membrane material keeps high barrier property; the composite membrane material prevents the integral structural damage caused by the local damage of the composite membrane material due to the rat bite. By way of example, when the warehouse is a granary, the granary can achieve the effect of preventing mice by adopting the composite membrane material in the embodiment of the utility model, and complicated anti-mice and insect prevention facilities are not needed to be additionally arranged, so that the granary has a complex structure and high cost, and the granary can be quickly built and recovered. Moreover, warehouse operators and warehouse storage are not exposed to the risk of contacting the rodenticide, so that the discomfort of the operators and the pollution of the rodenticide to the warehouse storage are avoided.

The composite membrane material can be used for quickly constructing a warehouse without adopting a brick-concrete structure, a brick-wood structure, a metal structure and the like, and an auxiliary structure is not required to be designed for the functions of mildew resistance, moisture resistance, rat resistance, insect resistance, ageing resistance and the like of a warehouse (such as grains or fruits and vegetables), so that the cost of the warehouse is reduced. In particular, when the warehouse is a temporary or periodic facility, for example, when the warehouse is a non-permanent granary such as a granary for outdoor or farmer temporary storage of grains, the composite membrane material can be adopted to surround a containing cavity of the granary to store grains, and gas and moisture are prevented from entering the containing cavity to cause the grains to mould, and the composite membrane material can be repeatedly built, disassembled and recycled. The cost of the granary is effectively reduced, the construction speed is improved, the flexibility of the construction position of the granary is improved, and the granary is particularly suitable for large grain breeders, for example, the granary is particularly suitable for large grain breeders needing to harvest and temporarily store 5-300 tons of grains. It can be understood that the composite membrane material of the embodiment of the utility model can be adopted, and warehouses with different sizes or different shapes can be quickly built according to different requirements of users so as to meet the warehouse requirements and adopt the composite membrane material of the utility model.

In one example, in a warehouse, PVC film XB is located outside of metal barrier XA. That is, the metal barrier layer XA is closer to the inside of the warehouse than the PVC film material XB. Thus, even if the PVC film XB is accidentally destroyed by a mouse before the mouse is abandoned to bite, the warehouse is still isolated from the external environment by the metal barrier layer XA, so that the functions of the warehouse are kept complete, such as avoiding gas leakage in the warehouse and still achieving the dampproof and mildew-proof effects. Furthermore, the metal barrier layer XA can also completely block the rodenticide in the PVC interlayer, so as to prevent the rodenticide in the PVC interlayer from polluting storage objects, such as grains in a granary from being polluted by the rodenticide.

In one embodiment of the present utility model, the PVC clamp fabric layer may include a top PVC glue layer 5 (i.e., top PVC glue layer), a polyester fiber mesh cloth 6, and a bottom PVC glue layer 7 (i.e., bottom PVC glue layer) laminated in this order. The materials of the surface PVC adhesive layer 5 and the bottom PVC adhesive layer 7 can be the same or different. Wherein at least one of the top PVC glue layer 5 and the bottom PVC glue layer 7 has a rodenticide, e.g. a bittering or spicy agent, or other additives which can cause a noticeable unpleasant taste sensation to rodents.

In one example, the rodenticide in the PVC ballast layer is capsaicin. In this way, capsaicin can stimulate the oral mucosa and gustatory nerves of the murine animal to promote the murine animal to get rid of chewing, thus realizing the purpose of preventing mice; capsaicin also has a pungent odor that can stimulate the smell of animals to repel rodents. Moreover, the spicy flavor of the capsaicin has repellent or killing effect on other animals or insects, for example, the spicy flavor of the capsaicin can prevent wild animals such as hares from biting the composite membrane material or kill the insects such as termites biting the composite membrane material. Therefore, the composite membrane material has various protection capacities of preventing mice, insects, rabbits and the like. In particular, the PVC laminated mesh layer of the composite film is sandwiched between the metal barrier layer XA and the surface treatment layer 8, so that it is not directly exposed and has high safety, and thus the protection ability against animals and insects can be improved by increasing the amount of the rodenticide.

In one embodiment of the present utility model, the PVC paste with the rodenticide may be prepared first, and then the PVC paste with the rodenticide may be used to prepare the top PVC glue layer 5 and the bottom PVC glue layer 7 with the rodenticide. In this way, the rodenticide can be ensured to be uniformly distributed in the surface PVC adhesive layer 5 and the bottom PVC adhesive layer 7. Of course, if no rodenticide is in the surface PVC glue layer 5 or the bottom PVC glue layer 7, the surface PVC glue layer 5 or the bottom PVC glue layer 7 with rodenticide is prepared by adopting a PVC paste with rodenticide; the surface PVC glue layer 5 or the bottom PVC glue layer without the rodenticide is prepared by adopting PVC paste without the rodenticide.

Alternatively, the mass content of the rodenticide in the PVC paste with the rodenticide is between 0.5% and 5%, for example between 0.5% and 1.5%. Further, considering the shielding of the surface treatment layer 8 to the PVC clip net layer, the rodenticide can be made to have a higher mass ratio to improve the rodenticide effect without worrying about pollution to warehouses or harm to operators, for example, the rodenticide bite protection rate can be improved to more than 99%. Further, in the PVC paste with the rodenticide, the content of the rodenticide may be made not less than 1.5% by mass, for example, between 2% and 5%.

In one example, the top PVC glue layer 5 and the bottom PVC glue layer 7 each contain a rodenticide.

In one example, the material of the top PVC glue layer 5 and the bottom PVC glue layer 7 are the same.

In one example, the face PVC glue layer 5 is located on the side of the bottom PVC glue layer 7 adjacent to the metal barrier layer XA; wherein the thickness of the surface PVC glue layer 5 is not less than the thickness of the bottom PVC glue layer 7.

In one example, the thickness of the surface PVC glue layer 5 is between 350 micrometers and 500 micrometers, and through a great number of experiments, the thickness of the surface PVC glue layer 5 is too thin, the contact surface between the metal barrier layer XA and the surface PVC glue layer 5 is not good in adhesion degree, and the thickness is too thick, so that the manufacturing cost of the composite membrane material is increased.

In one example, the thickness of the bottom PVC glue layer 7 is between 200 micrometers and 350 micrometers, and a great amount of experiments prove that the thickness of the bottom PVC glue layer 7 is too thin, the contact surface between the surface treatment layer 8 and the bottom PVC glue layer 7 is not good in adhesion degree, and the thickness is too thick, so that the manufacturing cost of the composite film material is increased.

In the embodiment of the utility model, through a large number of experiments, the surface PVC adhesive layer 5 can enable the metal barrier layer XA to be better attached to the polyester fiber mesh cloth. The bottom PVC adhesive layer 7 can enable the surface treatment layer 8 to be better attached to the polyester fiber mesh cloth, and the polyester fiber mesh cloth can enable the composite membrane material of the embodiment of the utility model to have higher in-plane tensile bearing capacity, so that the requirement of engineering structures on the tensile property of the membrane material is met.

In some embodiments of the present utility model, the PVC paste with a rodenticide may include rodenticides, polyvinyl chloride, blending resins, plasticizers, heat stabilizers, flame retardants, fillers, flame retardant fillers, mold inhibitors, uv absorbers, and antioxidants. Of course, new materials can be added or reduced as appropriate according to performance requirements.

In one embodiment of the utility model, the PVC paste without the rodenticide does not have the rodenticide as compared to the PVC paste with the rodenticide. Further, the components and the contents of the respective components in the PVC paste without the rodenticide are the same as those of the other components and the contents of the components other than the rodenticide in the PVC paste with the rodenticide.

In one example, the plasticizer may be diisononyl phthalate.

In one example, the heat stabilizer may be a barium zinc stabilizer or a calcium zinc stabilizer.

In one example, the stabilizer may be soybean oil, and in particular, epoxidized soybean oil.

In one example, the flame retardant may be antimony oxide.

In one example, the filler may be heavy calcium carbonate to reduce the cost of the composite membrane and to increase the hardness of the composite membrane.

In one example, the flame retardant filler may be aluminum hydroxide. Therefore, the flame-retardant filler can realize flame retardance and simultaneously can play roles of filling and smoke abatement, so that the cost of the composite membrane material is reduced and the safety of a warehouse is improved.

In one embodiment of the present utility model, the PVC paste (polyvinyl chloride paste) includes, in addition to the rodenticide: 80 to 85 parts of polyvinyl chloride, 15 to 20 parts of blending resin, 65 to 75 parts of plasticizer, 2.5 to 3.5 parts of heat stabilizer, 1 to 2 parts of stabilizer, 6 to 12 parts of flame retardant, 20 to 35 parts of filler, 10 to 15 parts of flame retardant filler, 2 to 2.5 parts of mildew inhibitor, 0.8 to 1.5 parts of ultraviolet absorber and 0.4 to 0.6 part of antioxidant.

In one example, in the PVC paste, the mass parts of the respective components, excluding the rodenticide, are: 80 parts of polyvinyl chloride, 15 parts of blending resin, 65 parts of diisononyl phthalate, 2.5 parts of heat stabilizer, 1 part of soybean oil, 6 parts of antimony oxide, 20 parts of heavy calcium, 10 parts of aluminum hydroxide, 2 parts of mildew inhibitor, 0.8 part of ultraviolet absorber and 0.4 part of antioxidant.

Alternatively, capsaicin may be dissolved in diisononyl phthalate, for example, a mixture of capsaicin and diisononyl phthalate is heat-treated at 60 to 80 ℃ to obtain a liquid, and then mixed with other components (such as polyvinyl chloride, a blending resin, a heat stabilizer, a flame retardant, a filler, a flame retardant filler, a mold preventive, an ultraviolet absorber and an antioxidant) in a PVC paste to obtain a PVC paste with a rodenticide.

Further, the PVC paste with the rodenticide consists of polyvinyl chloride, blending resin, diisononyl phthalate, heat stabilizer, soybean oil, antimony oxide, heavy calcium, aluminum hydroxide, mildew inhibitor, ultraviolet absorber, antioxidant and rodenticide.

In one embodiment of the utility model, the method for preparing the PVC sandwich cloth layer can comprise three steps of coating and priming, pre-plasticizing and plasticizing.

In the coating and priming step, PVC paste can be coated on the polyester fiber mesh cloth and is pre-plasticized for the first time, the PVC paste in the coating and priming step can be PVC paste without a rodenticide or PVC paste with a rodenticide, and whether the PVC paste in the coating and priming step needs to contain the rodenticide or not is determined according to the content of the rodenticide required by the whole PVC sandwich cloth layer. In the pre-plasticizing step and the plasticizing step, PVC paste may be coated on both sides of the primed polyester fiber mesh cloth, respectively, to finally form the top PVC glue layer 5 and the bottom PVC glue layer 7, respectively.

Specifically, in the coating and priming step, the PVC paste can be coated on the polyester fiber mesh cloth, so that the PVC paste fills the gaps of the mesh cloth; and then pre-plasticizing. In the pre-plasticizing step, one side (e.g., designated as the a side) of the coated and primed polyester fiber web may be coated with a further layer of PVC paste and then pre-plasticized. In the plasticizing step, the other side (e.g., designated as the B side) of the pre-plasticized polyester fiber web may be coated with a PVC paste and then plasticized to form a PVC jacket layer.

In one example, in the coating priming step, a PVC paste is coated onto the polyester fiber mesh cloth by a coating process (e.g., using a coating method).

In one example, in the priming step, the PVC paste is applied to both sides of the polyester fiber web simultaneously as the PVC paste is applied to the polyester fiber web. After simultaneously coating both sides of the polyester fiber mesh with PVC paste, a first pre-plasticizing is performed. Optionally, the time of the first pre-plasticizing is 30-60 seconds, and the temperature of the first pre-plasticizing is 140-160 ℃; illustratively, the time for the first pre-plasticizing is 30 seconds, and the temperature for the first pre-plasticizing is 160 ℃; for another example, the time for the first pre-plasticizing is 40 seconds, and the temperature for the first pre-plasticizing is 155 ℃; for another example, the time for the first pre-plasticizing is 60 seconds and the temperature for the first pre-plasticizing is 140 ℃.

In one example, when the PVC paste is applied simultaneously to both sides of the polyester fiber web in the coating priming step, the PVC paste is applied in an amount of 80 to 200 g/square meter (e.g., 80 g/square meter, 120 g/square meter, 160 g/square meter, 200 g/square meter) on one side.

In one example, the PVC paste is applied in a pre-plasticizing step in an amount of 200-500 grams per square meter (e.g., 200 grams per square meter, 300 grams per square meter, 400 grams per square meter, 500 grams per square meter). In this way, the coated PVC paste may eventually form part of the base PVC glue layer 7.

In one example, in the pre-plasticizing step, the second pre-plasticizing time is 30 to 60 seconds and the temperature of the second pre-plasticizing is 160 to 175 ℃.

In one example, in the plasticizing step, the PVC paste is applied in an amount of 200-700 grams per square meter (e.g., 200 grams per square meter, 300 grams per square meter, 400 grams per square meter, 500 grams per square meter, 600 grams per square meter, 700 grams per square meter). In this way, the coated PVC paste may eventually form part of the topcoat PVC glue layer 5.

In one example, in the plasticizing step, the plasticizing temperature is 180 to 210 ℃.

In one example, in the plasticizing step, the plasticizing time is 1 to 2 minutes.

It will be appreciated that the composition and amount of the PVC paste applied in each of the three steps, the priming step, the pre-plasticizing step and the plasticizing step, may be determined based on the composition of the film layer to be formed. When a rodenticide is not doped in one of the film layers, the PVC paste applied in the step of forming the film layer may be a rodenticide-free PVC paste. In one example of the present utility model, the PVC paste applied in the three steps of the priming step, the pre-plasticizing step and the plasticizing step are the same in composition and are all the PVC pastes containing the rodenticide. Therefore, on one hand, the PVC sandwich mesh cloth layer has a more sufficient and durable rat-proof effect, and the preparation process of the PVC sandwich mesh cloth layer can be simplified, so that the cost of the PVC sandwich mesh cloth layer is reduced, and finally the cost of the composite membrane material is reduced.

Alternatively, the material of the surface treatment layer 8 comprises polyvinylidene fluoride or polymethyl methacrylate, and may in particular comprise modified polyvinylidene fluoride. Thus, the surface treatment layer 8 may be a polyvinylidene fluoride layer or a polymethyl methacrylate layer. For example, a paint whose main component is modified polyvinylidene fluoride or polymethyl methacrylate may be coated or sprayed on the side of the PVC mesh layer remote from the metal barrier layer XA to form the surface treatment layer 8.

Optionally, the thickness of the surface treatment layer 8 is not less than 5 g/square meter, so that the surface treatment layer 8 has sufficient strength and thickness. Accordingly, in the case of preparing the surface-treated layer 8 by spraying the form of the coating material, the solid content of the sprayed coating material is not less than 5 g/square meter.

Optionally, when the PVC laminated mesh layer has a rodenticide, a great amount of experiments prove that the surface treatment layer 8 is a polyvinylidene fluoride layer or a polymethyl methacrylate layer, when the thickness is not less than 5 g/square meter, the surface treatment layer 8 does not influence the smell of the rodenticide to be transferred to the surface of the composite membrane material, and when animals such as mice approach the composite membrane material, the animals can be stimulated by the rodenticide and not bite the composite membrane material, and meanwhile, the discomfort symptoms that the smell of the rodenticide is transferred to an operator in a safe distance to cause the operator to be pungent and tear and the like can be avoided. In one example, a polyvinylidene fluoride layer or polymethyl methacrylate layer can be mounted on the surface of the bottom PVC adhesive layer 7 (the surface of the bottom PVC adhesive layer 7 far away from the surface PVC adhesive layer 5) in a wheel mode, and then the surface is sent to an oven for drying treatment, wherein the drying temperature is 145-160 ℃, and the drying time is 30-60 seconds; after cooling, the polyvinylidene fluoride layer or polymethyl methacrylate layer forms the surface treatment layer 8.

In one embodiment of the present utility model, a PVC mesh fabric layer may be prepared first, and then a surface treatment layer 8 is formed on the surface of the bottom PVC glue layer 7 of the PVC mesh fabric layer, to obtain a PVC film XB. Then, after a glue layer 4 is sequentially formed on the surface of the surface PVC glue layer 5 of the PVC sandwich cloth layer, a metal barrier layer XA is attached, so that the metal foil layer 3 of the metal barrier layer XA is attached to the PVC film XB through the glue layer 4. For example, the surface of the PVC adhesive layer 5 can be uniformly coated with the water layer 4, and then the metal foil layer 3 and the water layer 4 are extruded and attached.

In one example, the wheel mounting and gluing technology and the attaching technology are combined, the surface PVC glue layer 5 is wheel mounted and glued, the gluing amount is controlled to be 10-30 g/square meter, the glue drying temperature is 120-160 ℃, and the temperature and the speed are set according to the glue drying state; the metal barrier layer is sent to a large cylinder to be bonded with the surface PVC adhesive layer 5 through the pressing and bonding of the adhesive layer 4, the temperature of the large cylinder is 80-120 ℃, the time is 20-40 seconds, and the metal foil layer 3 (such as an aluminum foil layer) is cooled and bridged to solidify after the bonding of the surface PVC adhesive layer 5 is completed.

The embodiment of the utility model also provides a preparation method of the composite membrane material, and the composite membrane material of some embodiments of the utility model can be prepared by adopting the preparation method. The preparation method of the composite membrane comprises the following steps:

step S110, preparing a metal barrier layer;

step S130, preparing a PVC membrane material;

and S150, attaching the metal barrier layer to the surface of the PVC film material.

Thus, the obtained composite membrane material comprises a metal barrier layer and a PVC membrane material which are sequentially laminated.

In one embodiment of the present utility model, the preparing a metal barrier layer (step S110) includes: laminating a PET layer on the surface of the metal foil layer; and (3) attaching a PE layer on the surface of the PET layer to obtain the metal barrier layer.

Thus, the prepared metal barrier layer comprises a metal foil layer, a PET layer and a PE layer which are sequentially laminated.

In one embodiment of the present utility model, the preparing a PVC film material (step S130) includes: preparing a PVC (polyvinyl chloride) sandwich mesh layer, wherein the PVC sandwich mesh layer comprises a surface PVC adhesive layer, a polyester fiber mesh and a bottom PVC adhesive layer which are stacked; and (3) coating polyvinylidene fluoride or polymethyl methacrylate on a bottom PVC adhesive layer of the PVC sandwich mesh cloth membrane material, and drying at 145-160 ℃ for 30-60 seconds to obtain a surface treatment layer formed on the surface of the bottom PVC adhesive layer.

Thus, the prepared PVC membrane material comprises a surface PVC adhesive layer, a polyester fiber mesh cloth, a bottom PVC adhesive layer and a surface treatment layer which are sequentially laminated.

In one embodiment of the present utility model, attaching the metal barrier layer to the PVC film surface (step S150) includes: coating a glue layer on the surface of the surface PVC glue layer; and extruding and attaching the metal foil layer and the glue layer.

Thus, the prepared composite membrane material comprises a metal barrier layer, a glue layer and a PVC membrane material which are sequentially laminated; the metal foil layer of the metal barrier layer is bonded with the surface PVC adhesive layer of the PVC film material through the adhesive layer.

A large number of experiments prove that the thickness of the composite membrane material is 0.60-1.2 mm, the performances of strength, barrier effect, rat-proof effect, bonding effect and the like are very good, the manufacturing cost is low, and the composite membrane material is applied to a granary, so that the construction cost of the granary is reduced, the construction speed is improved, and the composite membrane material can be used for 20 years without damage.

The properties of the composite film material of the embodiment of the present utility model, such as a rat-proof effect, a skin-like effect, a barrier effect, and an adhesive effect, were tested by taking the example that the metal foil layer 3 is an aluminum foil layer, the rat-proof agent is capsaicin, and the glue is a mixture of a high molecular weight polyester resin and ethyl acetate.

In the composite membrane material adopted in the test, the composite membrane material comprises a surface treatment layer, a bottom PVC adhesive layer, a polyester fiber mesh cloth, a surface PVC adhesive layer, a glue layer, a metal foil layer, a PET layer and a PE layer which are sequentially laminated. Wherein the surface treatment layer is a polyvinylidene fluoride layer with a thickness of 5 g/square meter. The thicknesses of the bottom PVC adhesive layer and the surface PVC adhesive layer are respectively 300 micrometers and 400 micrometers, and the weight contents of the components except the rodenticide are as follows: 80 parts of polyvinyl chloride, 15 parts of blending resin, 65 parts of diisononyl phthalate, 2.5 parts of heat stabilizer, 1 part of soybean oil, 6 parts of antimony oxide, 20 parts of heavy calcium, 10 parts of aluminum hydroxide, 2 parts of mildew inhibitor, 0.8 part of ultraviolet absorber and 0.4 part of antioxidant. The bottom PVC adhesive layer and the surface PVC adhesive layer both contain a rodenticide, and the rodenticide is capsaicin; the mass content of capsaicin is 2% unless otherwise stated. The thickness of the aluminum foil layer was 10 microns, the thickness of the PET layer was 10 microns, the thickness of the PE layer was 80 microns, and the thickness of the glue layer was 5 microns.

Test one: mouse biting experiment

The 5 experimental mice are fed with the mouse feed for 3 months, then starved for two days (only water is provided), then the 5 experimental mice are respectively put into 5 mouse cages, only water is provided for three days, and the 5 mouse cages are respectively placed with composite membrane materials with the thickness of 10cm x 10cm in advance. One of the composite membrane materials is not added with capsaicin; in the other four composite membrane materials, the mass contents of capsaicin in the PVC adhesive layer materials in the PVC net cloth layer are respectively 1%, 1.5%, 3% and 5%. The four composite membrane materials containing capsaicin are all composite membrane materials of the embodiment of the utility model, and the composite membrane materials without capsaicin are different from other composite membrane materials only in that the PVC net cloth layer does not contain capsaicin. Three days of continuous tracking, and the biting condition of each composite film material was recorded, and the results are shown in table 1:

TABLE 1

As can be seen from table 1 above, after the capsaicin content added by the PVC mesh fabric layer exceeds 1%, mice will not gnaw the capsaicin-containing composite membrane material even under the condition of high hunger, and these capsaicin-containing composite membrane materials are basically free from damage; even if the composite membrane is damaged, the composite membrane is locally tiny superficial damage, and the integrity of the composite membrane is not damaged.

And (2) testing II: skin test

10 volunteers were selected to contact the composite film without the surface treatment layer by hand, and the volunteers indicated that the hands had a hot pepper smell, had a pungent hot pepper smell, and had uncomfortable symptoms such as tearing of eyes.

10 volunteers touched the composite film with the surface treatment layer added by hand and fed back whether there was discomfort symptoms, especially whether there was a hot pepper taste; one month of continuous testing, volunteers all indicated no discomfort.

This shows that the composite membrane material of the embodiment of the utility model can effectively prevent the direct exposure of the rodenticide by adding the surface treatment layer, so that the harm to operators and the pollution to warehouses are further avoided.

And (3) test III: barrier experiments

The air blocking and moisture preventing effects of different composite films are tested. Each composite film is a composite film provided by the embodiment of the utility model, and the difference is only that the thickness of the metal foil layer in the composite film is different. At the time of the test, the test was carried out according to the methods of national standard GB/T1038-2000 (oxygen transmission amount) and national standard GB/T1037-1988 (water vapor transmission amount). According to a large number of test results, the blocking effect of the composite film material of the utility model on air reaches more than 99% when the thickness of the aluminum foil layer is not less than 10 microns.

And (3) testing four: adhesion Effect test

Cutting cross-shaped knife edges on the surface of the metal barrier layer by using a blade, wherein the intervals are at least 10 groups of the knife edges with the length of about 3 mm. Only the metal barrier layer is cut through to the glue layer, and the PVC net cloth layer is not damaged. And then continuously folding the metal barrier layer along the 90-degree right angle of the cross shape by hands, wherein the times of folding exceeds two hundred times, and the metal barrier layer does not fall off, thus showing that the bonding effect is good. 10 composite films (all of which are composite films according to the embodiment of the utility model) are selected as samples and tested according to the operation method, and all the samples show that the bonding effect is good.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

Claims (10)

1. The composite membrane material for the warehouse is characterized by comprising a metal barrier layer and a PVC membrane material which are sequentially laminated; the metal barrier layer comprises a metal foil layer bonded to the PVC film; the metal barrier layer further comprises a PET layer and a PE layer which are sequentially laminated on one side, far away from the PVC membrane, of the metal foil layer.

2. The composite film for a warehouse of claim 1, wherein the metal foil layer has a thickness of not less than 10 microns.

3. The composite film for a warehouse according to claim 2, wherein the metal foil layer is an aluminum foil layer, a copper foil layer, an iron foil layer, or a tin foil layer.

4. The composite film for a warehouse of claim 2, wherein the metal foil layer is bonded to the PVC film by a glue layer; the thickness of the glue layer is 5-10 microns.

5. The composite film for a warehouse according to claim 1, wherein the PE layer has a thickness of 80 to 100 micrometers and the PET layer has a thickness of 10 to 20 micrometers.

6. The composite film for a warehouse of claim 1, wherein the PVC film comprises a PVC laminated mesh layer and a surface treatment layer on a side of the PVC laminated mesh layer remote from the metal barrier layer.

7. The composite film for a warehouse according to claim 6, wherein the material of the surface treatment layer comprises polyvinylidene fluoride or polymethyl methacrylate.

8. The composite film for a warehouse as claimed in claim 6, wherein the thickness of the surface treatment layer is not less than 5 g/square meter.

9. A warehouse characterized in that it has a composite film material according to any one of claims 1 to 8.

10. The warehouse as claimed in claim 9, wherein the warehouse is a grain bin or a fresh keeping warehouse.

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