Low-temperature-resistant food-grade netted sandwich cloth for fermentation and production method of netted sandwich cloth

Abstract

The invention belongs to the field of netted sandwich cloth, and particularly relates to low-temperature-resistant food-grade netted sandwich cloth for fermentation and a production method of the low-temperature-resistant food-grade netted sandwich cloth. A first polyurethane functional layer is arranged above the base cloth, a second polyurethane functional layer is arranged below the base cloth, an anti-sticking layer is arranged above the first polyurethane functional layer, a polyester fiber grid layer is arranged below the second polyurethane functional layer, the porosity of the polyester fiber grid layer is 35%-40%, and the porosity of the polyester fiber grid layer is 35%-40%. The anti-sticking layer is made of an organic silicon modified fluorocarbon resin material, and by arranging the anti-sticking layer made of the organic silicon modified fluorocarbon resin material, the anti-sticking performance of the net clamping cloth can be greatly improved, the adhesion of a fermentation product can be reduced, the fermentation product can be conveniently taken out, subsequent cleaning and sterilization are facilitated, and the net clamping cloth is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of mesh fabric, specifically a low-temperature resistant food-grade mesh fabric for fermentation and its production method. Background Technology

[0002] In current technology, mesh fabric is generally used as a liner in fermentation containers. The mesh fabric has a rigid mesh structure on the side closest to the inside of the container to support it. The fermenting material is wrapped inside the mesh fabric, and the mesh structure allows air to pass through, which facilitates fermentation and reduces the occurrence of anaerobic fermentation.

[0003] However, when using existing mesh fabrics, fermentation products tend to stick to the surface of the mesh fabric, resulting in some residue on the mesh fabric after the fermentation products are removed. This also makes subsequent cleaning inconvenient and easily leads to bacterial contamination. Therefore, in order to address the above problems, a low-temperature resistant food-grade mesh fabric for fermentation and its production method are proposed. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a low-temperature resistant food-grade fermentation mesh fabric and its production method.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a low-temperature resistant food-grade fermentation mesh fabric, comprising a base fabric; a first polyurethane functional layer is provided above the base fabric, and a second polyurethane functional layer is provided below the base fabric; an anti-sticking layer is provided above the first polyurethane functional layer, and a polyester fiber mesh layer is provided below the second polyurethane functional layer; the porosity of the polyester fiber mesh layer is 35% to 40%; and the anti-sticking layer is made of silicone-modified fluorocarbon resin.

[0006] Preferably, the base fabric is 1000D high-strength polyester.

[0007] Preferably, an antibacterial layer is provided above the anti-stick layer, and the antibacterial layer is a silver ion modified polyurethane coating.

[0008] Preferably, the base fabric is configured as two layers, with an electrically heated film layer provided between the two base fabric layers.

[0009] Preferably, an epoxy resin layer is provided between the antibacterial layer and the first polyurethane functional layer.

[0010] A method for producing a low-temperature resistant food-grade fermentation mesh fabric, applicable to the aforementioned low-temperature resistant food-grade fermentation mesh fabric, comprising the following steps; S1: A multi-roller collaborative conveying system is adopted, and the unwinding roller group of the multi-roller collaborative conveying system is used to unwind the base fabric; S2: Spray polyurethane dispersion onto the upper and lower surfaces of the base fabric. After drying, the polyurethane dispersion forms a first polyurethane functional layer and a second polyurethane functional layer on the upper and lower surfaces of the base fabric. S3: Spray an organosilicon fluorocarbon emulsion onto the surface of the first polyurethane functional layer after drying, and form an anti-stick layer after drying. S4: A polyester fiber mesh layer is hot-pressed onto the bottom of the second polyurethane functional layer to obtain a mesh fabric. S5: Use a take-up roller set to take up the mesh fabric.

[0011] Preferably, in S1, after the base fabric is unwound, it is subjected to plasma activation treatment, and after the treatment is completed, a silane coupling agent is coated to enhance the interfacial bonding force.

[0012] Preferably, the plasma activation of the base fabric is performed in an argon-oxygen mixed gas with an argon-oxygen ratio of 4:1 and a plasma activation time of 25-35 seconds.

[0013] The advantages of this invention are: 1. This invention significantly improves the anti-sticking performance of the mesh fabric by setting an anti-sticking layer made of silicone-modified fluorocarbon resin, which can reduce the adhesion of fermented materials, facilitate the removal of fermented materials, and facilitate subsequent cleaning and sterilization, making it convenient to use; 2. This invention incorporates an electrically heated film layer. During use, depending on the requirements of the environment, the base fabric is arranged on both sides, with the electrically heated film layer sandwiched between the two base fabric layers. The electrically heated film layer generates heat when energized, thereby facilitating and precisely controlling the fermentation temperature, which is ideal for fermentation scenarios with high requirements for fermentation temperature. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the mesh fabric structure of the present invention; Figure 2 This is a flowchart of the method of the present invention; In the figure: 11, base fabric; 12, first polyurethane functional layer; 13, second polyurethane functional layer; 14, polyester fiber mesh layer; 15, anti-stick layer; 2, antibacterial layer; 3, electric heating film layer; 4, epoxy resin layer. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Specific implementation examples are given below.

[0018] Please see Figure 1 As shown, a low-temperature resistant food-grade fermentation mesh fabric includes a base fabric 11; a first polyurethane functional layer 12 is provided above the base fabric 11, and a second polyurethane functional layer 13 is provided below the base fabric 11; an anti-sticking layer 15 is provided above the first polyurethane functional layer 12, and a polyester fiber mesh layer 14 is provided below the second polyurethane functional layer 13; the porosity of the polyester fiber mesh layer 14 is 35% to 40%; and the anti-sticking layer 15 is made of silicone-modified fluorocarbon resin. In use, the base fabric 11 has a first polyurethane functional layer 12 and a second polyurethane functional layer 13 on its upper and lower surfaces. The polyurethane functional layer has good resistance to extreme temperatures of -40℃ to 120℃ and is resistant to chemical corrosion, such as immersion in citric acid and acetic acid. It also has an anti-stick layer 15 made of silicone-modified fluorocarbon resin, which can reduce the adhesion of fermented material, make it easy to remove fermented material, and facilitate subsequent cleaning and sterilization, making it convenient to use.

[0019] Furthermore, such as Figure 1 As shown, the base fabric 11 is 1000D high-strength polyester.

[0020] Furthermore, such as Figure 1 As shown, an antibacterial layer 2 is provided above the anti-stick layer 15, and the antibacterial layer 2 is a silver ion modified polyurethane coating. When in use, an antibacterial layer 2 is provided above the non-stick layer 15. The antibacterial layer 2 is made of silver ion modified polyurethane coating, which can greatly improve the antibacterial performance of the mesh fabric.

[0021] Furthermore, such as Figure 1 As shown, the base fabric 11 is configured as two layers, and an electric heating film layer 3 is provided between the two base fabric layers 11; When in use, the base fabric 11 is set on both sides according to the needs of the usage environment, and an electric heating film layer 3 is sandwiched between the two base fabrics 11. The electric heating film layer generates heat when energized, which can facilitate and accurately control the fermentation temperature, targeting fermentation scenarios with high requirements for fermentation temperature.

[0022] Furthermore, such as Figure 1 As shown, an epoxy resin layer 4 is provided between the antibacterial layer 2 and the first polyurethane functional layer 12; During use, depending on the requirements of the usage environment, an epoxy resin layer 4 is provided between the antibacterial layer 2 and the first polyurethane functional layer 12. The epoxy resin layer 4 can improve the ethanol resistance of the mesh fabric, which is suitable for some usage environments involving alcohol fermentation.

[0023] like Figure 2 As shown, a method for producing a low-temperature resistant food-grade fermentation mesh fabric is described. This method is applicable to the aforementioned low-temperature resistant food-grade fermentation mesh fabric and includes the following steps: S1: A multi-roller collaborative conveying system is adopted, and the unwinding roller group of the multi-roller collaborative conveying system unwinds the base fabric 11; S2: Spray polyurethane dispersion onto the upper and lower surfaces of the base fabric 11. After drying, the polyurethane dispersion forms a first polyurethane functional layer 12 and a second polyurethane functional layer 13 on the upper and lower surfaces of the base fabric 11. S3: Spray an organosilicon fluorocarbon emulsion onto the surface of the first polyurethane functional layer 12 after drying, and after drying, an anti-stick layer 15 is formed. S4: A polyester fiber mesh layer 14 is hot-pressed onto the underside of the second polyurethane functional layer 13 to obtain a mesh fabric. S5: Use a take-up roller set to take up the mesh fabric.

[0024] Furthermore, such as Figure 1-2 As shown in S1, after the base fabric 11 is unwound, it is subjected to plasma activation treatment. After the treatment is completed, a silane coupling agent is coated to enhance the interfacial bonding force. During the production process, the base fabric 11 is pre-treated with plasma to increase the surface energy to 55 mN / m, and coated with a silane coupling agent to significantly improve the bonding force between the polyester base fabric 11 and the first polyurethane layer and the second polyurethane functional layer 13, thereby reducing the delamination that may occur during the subsequent use of the mesh fabric.

[0025] Furthermore, such as Figure 1-2 As shown, the plasma activation of the base fabric 11 is carried out in an argon-oxygen mixed gas with an argon-oxygen ratio of 4:1 and a plasma activation time of 25-35 seconds.

[0026] Working principle: During use, the base fabric 11 has a first polyurethane functional layer 12 and a second polyurethane functional layer 13 on its upper and lower surfaces. The polyurethane functional layer has good resistance to extreme temperatures of -40℃ to 120℃ and is resistant to chemical corrosion, such as immersion in citric acid and acetic acid. It also has a silicone-modified fluorocarbon resin anti-stick layer 15, which can reduce the adhesion of fermented material, making it easy to remove the fermented material and facilitate subsequent cleaning and sterilization, making it convenient to use. During use, an antibacterial layer 2 is provided above the anti-stick layer 15. The antibacterial layer 2 uses a silver ion modified polyurethane coating, which can significantly improve the antibacterial performance of the mesh fabric. During use, depending on the needs of the usage environment, the base fabric 11 is set on both sides, and an electric heating film layer 3 is sandwiched between the two base fabric layers 11. The electric heating film layer heats up when energized, which can facilitate and accurately control the fermentation temperature, targeting fermentation scenarios with high requirements for fermentation temperature. During use, depending on the requirements of the usage environment, an epoxy resin layer 4 is provided between the antibacterial layer 2 and the first polyurethane functional layer 12. The epoxy resin layer 4 can improve the ethanol resistance of the mesh fabric, which is suitable for some usage environments involving alcohol fermentation.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A low-temperature resistant food-grade fermentation mesh fabric and its production method, comprising a base fabric (11); characterized in that: The base fabric (11) has a first polyurethane functional layer (12) above it and a second polyurethane functional layer (13) below it. The first polyurethane functional layer (12) has an anti-stick layer (15) above it and a polyester fiber mesh layer (14) below it. The polyester fiber mesh layer (14) has a porosity of 35% to 40%. The anti-stick layer (15) is made of silicone-modified fluorocarbon resin.

2. The low-temperature resistant food-grade fermentation mesh fabric and its production method according to claim 1, characterized in that: The base fabric (11) is 1000D high-strength polyester.

3. The low-temperature resistant food-grade fermentation mesh fabric and its production method according to claim 2, characterized in that: An antibacterial layer (2) is provided above the anti-stick layer (15), and the antibacterial layer (2) is a silver ion modified polyurethane coating.

4. The low-temperature resistant food-grade fermentation mesh fabric and its production method according to claim 3, characterized in that: The base fabric (11) is configured as two layers, and an electric heating film layer (3) is provided between the two base fabrics (11).

5. The low-temperature resistant food-grade fermentation mesh fabric and its production method according to claim 4, characterized in that: An epoxy resin layer (4) is provided between the antibacterial layer (2) and the first polyurethane functional layer (12).

6. A method for producing a low-temperature resistant food-grade fermentation mesh fabric, characterized in that: This production method is applicable to the low-temperature resistant food-grade fermentation mesh fabric described in any one of claims 1-5, and the production method includes the following steps; S1: A multi-roller collaborative conveying system is adopted, and the unwinding roller group of the multi-roller collaborative conveying system unwinds the base fabric (11). S2: Spray polyurethane dispersion onto the upper and lower surfaces of the base fabric (11). After drying, the polyurethane dispersion forms a first polyurethane functional layer (12) and a second polyurethane functional layer (13) on the upper and lower surfaces of the base fabric (11). S3: Spray an organosilicon fluorocarbon emulsion onto the surface of the first polyurethane functional layer (12) after drying, and form an anti-stick layer (15) after drying. S4: A layer of polyester fiber mesh layer (14) is hot-pressed onto the bottom of the second polyurethane functional layer (13) to obtain a mesh fabric; S5: Use a take-up roller set to take up the mesh fabric.

7. The low-temperature resistant food-grade fermentation mesh fabric and its production method according to claim 6, characterized in that: In S1, after the base fabric (11) is unwound, the base fabric (11) is subjected to plasma activation treatment. After the treatment is completed, a silane coupling agent is coated to enhance the interfacial bonding force.

8. The low-temperature resistant food-grade fermentation mesh fabric and its production method according to claim 7, characterized in that: The plasma activation of the base fabric (11) is carried out in an argon-oxygen mixed gas with an argon-oxygen ratio of 4:1 and a plasma activation time of 25-35 seconds.

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