Reinforced sandwich mesh material and preparation method thereof

Abstract

The invention discloses a reinforced sandwich mesh material and a preparation method thereof, and belongs to the technical field of composite materials, the reinforced sandwich mesh material comprises a first PVC film, mesh cloth, a second PVC film and knitted fabric which are arranged in sequence; and the difference value of the shrinking percentage of the mesh fabric and the knitted fabric is within 1%. The invention also provides a preparation method of the reinforced sandwich net material. The preparation method comprises the following steps: respectively pasting two sides of the net cloth and one side of the knitted cloth; preheating the pasted screen cloth and knitted cloth, and then laminating the screen cloth and knitted cloth with the first PVC film and the second PVC film; the temperature difference between the preheated and pasted screen cloth and the preheated and pasted knitted fabric is within 2 DEG C. By specifically selecting the mesh fabric and the knitted fabric, the reinforced mesh clamping material which is skin-friendly and high in strength is obtained, and the reinforced mesh clamping material is not prone to coiling in the preparation process and easy to compound.

Description

Technical Field

[0001] The invention belongs to the technical field of composite materials, and particularly relates to a reinforced sandwich material and a preparation method thereof. Background Art

[0002] The mesh material is also called interlayer material or sandwich material. It is a composite material composed of two or more layers of film material and a mesh cloth. Among them, PVC film mesh material is a commonly used mesh material. The PVC film is located on both sides of the mesh cloth, as the outer layer of the mesh material, providing waterproof, weather-resistant and protective effects; the mesh cloth is sandwiched between the PVC film to provide the strength and stability of the material. PVC film mesh material is widely used in many fields due to its light weight, high strength and durability, such as awnings, exhibition tents, bags, raincoats, inflatable products, etc. For example, the Chinese invention patent with application number 201510022097.0 discloses a forest camouflage knitted waders material. The waders material is prepared by compounding forest camouflage knitted cloth with PVC transparent embryo membrane after being treated with paste, wherein the PVC transparent embryo membrane is at least one layer or more. The forest camouflage knitted waders material is made of highly transparent film and camouflage knitted material. The product is unique and beautiful, with a bright surface and clear patterns. It solves the problems of traditional PVC waders materials with single colors. It has a beautiful appearance and is reliable in use. It has a sense of fashion and increases the economic added value of the material. However, when this type of mesh material is made into clothing such as waders, the film is in contact with the skin, so the wearing comfort is not high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a reinforced mesh material which is not easy to roll up after being bonded and has high comfort, and a preparation method thereof.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a reinforced mesh material, comprising a first PVC film, a mesh cloth, a second PVC film and a knitted cloth arranged in sequence; the difference in shrinkage rate between the mesh cloth and the knitted cloth is within 1%.

[0005] The method for preparing the reinforced mesh material comprises the following steps: S1. Pasting is performed on both sides of the mesh and one side of the knitted fabric; S2. The mesh and knitted fabric are preheated after the paste is applied, and then laminated with the first PVC film and the second PVC film; Among them, the temperature difference between the mesh cloth after preheating and pasting and the knitted cloth after preheating and pasting is within 2°C.

[0006] The beneficial effects of the present invention are as follows: the present invention prepares a skin-friendly and high-strength reinforced mesh material by specifically selecting mesh cloth and knitted cloth with a shrinkage rate difference within 1%, and combining them with a PVC film; the reinforced mesh material is not easy to be rolled up during the preparation process and is easy to compound, and can achieve large-scale efficient production; the preparation method of the reinforced mesh material can prepare a flat, firm reinforced mesh material with good waterproof and wear-resistant effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a finished product photo of the reinforced mesh material of an example in a specific embodiment of the present invention; Figure 2 This is a finished product photo of a comparative example of a reinforced mesh material in a specific embodiment of the present invention; Figure 3 Another pair of photos of finished products of the reinforced mesh material in a specific embodiment of the present invention; Figure 4 The following is another comparison of finished product photos of the reinforced mesh material in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0008] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0009] The reinforced mesh material comprises a first PVC film, a mesh cloth, a second PVC film and a knitted cloth which are arranged in sequence; the difference in shrinkage rate between the mesh cloth and the knitted cloth is within 1%.

[0010] From the above description, it can be seen that the beneficial effect of the present invention is that the present invention uses mesh and knitted fabric to make a new type of composite mesh material, which can effectively strengthen the mesh material and make it stronger and more durable. The obtained reinforced mesh material has the waterproof and wear-resistant properties of the mesh material itself. At the same time, the knitted fabric as the lining can effectively improve the comfort and skin-friendliness of the made-up clothing (such as waders). However, the present application is not just to simply add a layer of knitted fabric material. After adding the knitted fabric, the finished product often has the problem of curling in the preparation process, resulting in the inability to prepare a composite mesh material with high flatness and no creases and bubbles. This problem is overcome by selecting mesh and knitted fabric with a shrinkage difference within 1%, so that a flat reinforced mesh material with no creases and bubbles can be prepared in the end. There is no need to add new equipment or processes in the preparation process to keep the knitted fabric flat when it is fitted, thus avoiding an increase in production costs.

[0011] Furthermore, the reinforced mesh material includes a first PVC film, a first adhesive layer, a mesh cloth, a second adhesive layer, a second PVC film, a third adhesive layer and a knitted cloth which are arranged in sequence.

[0012] It can be seen from the above description that the first, second and third adhesive layers are used to firmly bond the PVC film to the mesh cloth and the knitted cloth, while ensuring that the composite material has high peelability.

[0013] Further, the mesh cloth has a shrinkage rate of 12-13%. Preferably, the mesh cloth is a 250D*20*20 plain woven polyester cloth with a shrinkage rate of 12-13%.

[0014] Furthermore, the knitted fabric is a 75D knitted fabric. Preferably, the knitted fabric uses a 75D 24-gauge knitted fabric with a shrinkage rate of 12-13%. The amount of paste applied to the mesh and knitted fabric is 12-15 g / m 2 Too little glue will cause the peel strength to be too poor and delamination will occur. Too much glue will cause the shrinkage rate of the knitted fabric to increase, exceeding 1%, resulting in the problem of finished product winding. From the above description, it can be seen that by selecting specific mesh and knitted fabrics so that the difference in shrinkage rate between the two is within 1%, the problem of easy winding of the fabric during the lamination process can be effectively avoided, and the effect of adding a layer of knitted fabric can be achieved.

[0015] Furthermore, in parts by weight, the first PVC film comprises the following raw materials: 100 parts of PVC resin, 80-90 parts of plasticizer and 2-3 parts of liquid stabilizer. The second PVC film is the same PVC film as the first PVC film, which is easy to produce. The raw materials for preparing the PVC film can include only the above three types, or other additives, such as anti-ultraviolet agents, antioxidants, etc. The second PVC film can also be selected according to different application fields. The PVC film with a different thickness or raw material composition from the first PVC film. The first PVC film and the second PVC film can be prepared according to the above formula, or they can be any commercially available PVC film.

[0016] Furthermore, the plasticizer is DOP or DINP, the liquid stabilizer is a barium zinc liquid stabilizer, and the PVC resin is a PVC resin with a polymerization degree of 1300.

[0017] The method for preparing the reinforced mesh material comprises the following steps: S1. Pasting is performed on both sides of the mesh and one side of the knitted fabric; S2. The mesh and knitted fabric are preheated after the paste is applied, and then laminated with the first PVC film and the second PVC film; Among them, the temperature difference between the mesh cloth after preheating and pasting and the knitted cloth after preheating and pasting is within 2°C.

[0018] From the above description, it can be seen that controlling the preheating temperature difference between the mesh fabric after pasting and the knitted fabric after preheating pasting can further avoid the difference in shrinkage rate between the two after pasting, and avoid the problem of curling in the subsequent bonding process.

[0019] Furthermore, the bonding temperature in S2 is 170-180° C., and the pressure is 35-40 kgf.

[0020] Furthermore, the amount of paste applied in S1 is 12-15 g / m 2 The paste is any commercially available PU glue. Further, the preheating temperature of the mesh fabric and the knitted fabric after the paste in S2 is 100-120°C.

[0021] Embodiment 1: The reinforced mesh material comprises a first PVC film, a mesh cloth, a second PVC film and a knitted cloth arranged in sequence; the difference in shrinkage rate between the mesh cloth and the knitted cloth is within 1%; The first PVC film and the second PVC film are the same commercially available PVC films; The mesh fabric is a polyester mesh fabric with a shrinkage rate of 12%, and the knitted fabric is a 75D knitted fabric with a shrinkage rate of 13%.

[0022] Embodiment 2: The reinforced mesh material comprises a first PVC film, a mesh cloth, a second PVC film and a knitted cloth arranged in sequence; the difference in shrinkage rate between the mesh cloth and the knitted cloth is within 1%; The first PVC film and the second PVC film are the same PVC films, both of which are prepared from 100 parts of PVC resin with a degree of polymerization of 1300, 85 parts of DOTP and 2.5 parts of barium zinc liquid stabilizer; The mesh fabric is a polyester mesh fabric with a shrinkage rate of 13%, and the knitted fabric is a 75D knitted fabric with a shrinkage rate of 12%.

[0023] Embodiment 3: A method for preparing a reinforced mesh material comprises the following steps: S1. 100kg of PVC resin having a degree of polymerization of 1300, 80kg of DOP and 3kg of barium zinc liquid stabilizer were mixed, and then calendered after mixing to obtain a first PVC film and a second PVC film; S2. Apply paste to both sides of 250D*20*20 plain woven polyester fabric (mesh fabric with 12% shrinkage) and one side of 75D 24-needle knitted fabric (knitted fabric with 12% shrinkage); the amount of paste is 12 g / m 2 S3. Preheat the mesh and knitted fabric after pasting at 110 ° C; S4. The preheated pasted mesh cloth and the preheated pasted knitted cloth are laminated at a pressure of 40 kgf and a temperature of 170° C. in a structure in which the first PVC film, mesh cloth, second PVC film and knitted cloth are sequentially laminated.

[0024] Embodiment 4: A method for preparing a reinforced mesh material comprises the following steps: S1. 100kg of PVC resin having a degree of polymerization of 1300, 90kg of DINP and 2kg of barium zinc liquid stabilizer were mixed, and then calendered after mixing to obtain a first PVC film and a second PVC film; S2. Apply paste to both sides of 250D*20*20 plain woven polyester fabric (mesh) and one side of 75D 24-needle knitted fabric; the amount of paste is 15 g / m 2 S3. Preheat the mesh and knitted fabric after pasting at 120 ° C; S4. The preheated glued mesh and the preheated glued knitted fabric are laminated in a structure in which the first PVC film, mesh, second PVC film and knitted fabric are laminated in sequence at a pressure of 35 kgf and a temperature of 180°C. The obtained reinforced mesh material is shown in FIG. Figure 1 shown.

[0025] Comparative Example 1: The only difference from Example 4 is that S3 is different. S3 of Comparative Example 1 is: the mesh cloth after pasting is preheated at 115°C, and the knitted cloth is preheated at 120°C. The obtained reinforced mesh material finished product is shown in Figure 2 shown.

[0026] Comparative Example 2: The 70D knitted fabric was used to replace the 75D 24-needle knitted fabric in Example 4. The obtained reinforced mesh material is shown in FIG. Figure 3 shown.

[0027] Comparative Example 3: 80D knitted fabric was used to replace the 75D 24-needle knitted fabric in Example 4. The obtained reinforced mesh material is shown in FIG. Figure 4 shown.

[0028] In summary, the preparation method of the reinforced mesh material provided by the present invention specifically selects mesh cloth and knitted cloth with a shrinkage rate within 1% (including 1%) during the preparation process, and compounds them with PVC film to prepare a reinforced mesh material. The obtained reinforced mesh material has a waterproof and wear-resistant outer layer, a soft and skin-friendly inner layer, good durability and comfort, and is easy to process. After multi-layer compounding, the finished product will not have the problem of winding. The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent changes made using the contents of the present invention specification and drawings, or directly or indirectly used in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Reinforced mesh material, characterized in that: The invention comprises a first PVC film, a mesh cloth, a second PVC film and a knitted cloth which are arranged in sequence; the difference in shrinkage rate between the mesh cloth and the knitted cloth is within 1%.

2. The reinforced mesh material according to claim 1, characterized in that: The invention comprises a first PVC film, a first adhesive layer, a mesh cloth, a second adhesive layer, a second PVC film, a third adhesive layer and a knitted cloth which are arranged in sequence.

3. The reinforced mesh material according to claim 1, characterized in that: The mesh cloth has a shrinkage rate of 12-13%.

4. The reinforced mesh material according to claim 1, characterized in that: The knitted fabric is 70-80D knitted fabric.

5. The reinforced mesh material according to claim 1, characterized in that: The first PVC film comprises the following raw materials in parts by weight: 100 parts of PVC resin, 80-90 parts of plasticizer and 2-3 parts of liquid stabilizer.

6. The reinforced mesh material according to claim 5, characterized in that: The plasticizer is DOP or DINP.

7. A method for preparing the reinforced mesh material according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Pasting is performed on both sides of the mesh and one side of the knitted fabric; S2. The mesh and knitted fabric are preheated after the paste is applied, and then hot-pressed with the first PVC film and the second PVC film; Among them, the temperature difference between the mesh cloth after preheating and pasting and the knitted cloth after preheating and pasting is within 2°C.

8. The method for preparing the reinforced mesh material according to claim 7, characterized in that: The temperature of hot pressing bonding in S2 is 170-180°C and the pressure is 35-40kgf.

9. The method for preparing the reinforced mesh material according to claim 7, characterized in that: The amount of paste applied in S1 is 12~15g / m 2 .

10. The method for preparing the reinforced mesh material according to claim 7, characterized in that: The preheating temperature of the mesh cloth and the knitted cloth after being pasted in S2 is 100-120°C.

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