Waterproof heat-sealing adhesive tape

Abstract

The utility model relates to a waterproof heat-sealing adhesive tape which sequentially comprises a TPU (Thermoplastic Polyurethane) hot melt adhesive film, a waterproof layer, a PUR (Polyurethane) moisture curing adhesive layer and a screen cloth base material from top to bottom, and the waterproof layer is a TPU cast film or a transfer PU (Polyurethane) coating; a thermochromic printing layer is arranged on one side, far away from the PUR moisture curing adhesive layer, of the screen cloth base material. According to the waterproof heat-sealing adhesive tape disclosed by the utility model, the PUR moisture curing adhesive layer is adopted as the adhesive layer between the screen cloth base material and the waterproof layer, and the PUR moisture curing adhesive can be cured at normal temperature and normal pressure, so that compared with the traditional transfer coating technology in which a solvent type adhesive needs to be dried at high temperature after being coated, the waterproof heat-sealing adhesive tape disclosed by the utility model has the advantages that the energy consumption is reduced, and the cost is reduced. And the diffusion migration risk caused by heating the dye attached to the screen cloth is avoided due to lower heat.

Description

Technical Field

[0001] The utility model relates to the technical field of adhesive tapes, in particular to a waterproof heat-sealing adhesive tape. Background Art

[0002] Waterproof heat-sealing tape is often used in the seams of jackets and windbreakers to enhance sealing and waterproofing. Its structure consists of a warp-knitted mesh bonded to a PU waterproof coating, with a hot-melt adhesive layer laminated onto the PU waterproof coating. This composite hot-melt adhesive layer is used to bond the fabric. The PU waterproof coating uses transfer coating technology, and a solvent-based PU coating is applied between the PU waterproof coating and the warp-knitted mesh to enhance adhesion. After bonding to the warp-knitted mesh, the fabric is oven-dried at approximately 150°C to dry out the solvent and promote cross-linking reaction and curing. This can easily cause disperse dyes to sublimate or migrate to the PU waterproof coating after bonding, resulting in noticeable color differences at the seams and affecting the aesthetics. Utility Model Content

[0003] The utility model aims to provide a waterproof heat-sealing tape, which can reduce the sublimation or color migration of dyes on polyester mesh fabrics.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The waterproof heat-sealing tape comprises, from top to bottom, a TPU hot-melt adhesive film, a waterproof layer, a PUR moisture-curing adhesive layer and a mesh base material. The waterproof layer is a TPU cast film or a transfer PU coating.

[0006] Preferably, the mesh base material is a polyester warp knitted mesh.

[0007] Preferably, the mesh base material has a gram weight of 15 g / m 2 -45g / m 2 .

[0008] Preferably, the thickness of the waterproof layer is 20 μm-50 μm.

[0009] Preferably, the hot melt temperature of the TPU hot melt adhesive film is 80°C-110°C.

[0010] Preferably, the thickness of the TPU hot melt adhesive film is 0.1 mm-0.15 mm.

[0011] Preferably, the PUR moisture-curing adhesive layer is fully coated on the waterproof layer and embedded in the mesh of the mesh substrate.

[0012] Preferably, a thermochromic printing layer is provided on the side of the mesh substrate away from the PUR moisture-curing adhesive layer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This new waterproof heat-sealable tape uses a PUR moisture-curing adhesive layer as the adhesive layer between the mesh substrate and the waterproof layer. This PUR moisture-curing adhesive cures at room temperature and pressure. Compared to traditional transfer coating techniques that require high-temperature drying after applying solvent-based adhesives, this new tape reduces energy consumption. The lower heat consumption avoids the risk of diffusion and migration of dyes attached to the mesh. Furthermore, a thermochromic print layer is applied to the mesh substrate, which changes color to reflect changes in ambient temperature, providing a temperature indicator – a feature not found in traditional waterproof heat-sealable tapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the waterproof heat-sealing tape of Examples 1 and 2 of the present invention.

[0016] Figure 2 This is a schematic structural diagram of the waterproof heat-sealing tape of Example 3 of the present utility model.

[0017] Markings in the figure: 11, TPU hot melt adhesive film; 12, waterproof layer; 13, PUR moisture curing adhesive layer; 14, mesh base material; 15, thermochromic printing layer. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description.

[0019] Example 1

[0020] like Figure 1 As shown, this embodiment provides a waterproof heat-sealing tape, which comprises, from top to bottom, a TPU hot-melt adhesive film 11, a waterproof layer 12, a PUR moisture-curing adhesive layer 13 and a mesh base material 14.

[0021] The mesh base material 14 is a polyester warp knitted mesh with a gram weight of 30g / m 2 .

[0022] The waterproof layer 12 is a TPU cast film with a thickness of 35 μm.

[0023] The TPU hot melt adhesive film 11 has a melting temperature of 80° C.-110° C. and a thickness of 0.15 mm.

[0024] The PUR moisture-curing adhesive layer 13 is fully coated on the waterproof layer 12 and embedded in the mesh of the mesh substrate 14. A sufficient amount of PUR moisture-curing adhesive is applied to the TPU cast film, and the mesh substrate 14 is then spread over the PUR moisture-curing adhesive. Due to the low density of the mesh substrate 14, a layer of release paper is inserted during rewinding to prevent the PUR moisture-curing adhesive from seeping through and causing back adhesion due to uncured PUR moisture-curing adhesive.

[0025] The production process of the waterproof heat-sealing tape of this embodiment is as follows: 1. First, a TPU cast film is prepared by a casting method; 2. Then, the TPU cast film and the mesh substrate 14 are combined with PUR moisture-curing adhesive to form a two-in-one waterproof composite material; 3. Then, the TPU hot-melt adhesive film 11 is laminated on the two-in-one composite material, and after cooling, curing and shaping; 4. Finally, the strips are cut into strips according to the width size to finally obtain a three-in-one waterproof heat-sealing tape.

[0026] Example 2

[0027] like Figure 1 As shown, this embodiment provides a waterproof heat-sealing tape, which comprises, from top to bottom, a TPU hot-melt adhesive film 11, a waterproof layer 12, a PUR moisture-curing adhesive layer 13 and a mesh base material 14.

[0028] The mesh base material 14 is a polyester warp knitted mesh with a gram weight of 45g / m 2 .

[0029] The waterproof layer 12 is a transfer PU coating with a thickness of 25 μm.

[0030] The TPU hot melt adhesive film 11 has a melting temperature of 80° C.-110° C. and a thickness of 0.1 mm.

[0031] The PUR moisture-curing adhesive layer 13 is fully coated on the waterproof layer 12 and embedded in the mesh of the mesh substrate 14. A sufficient amount of PUR moisture-curing adhesive is applied to the transfer PU coating, and the mesh substrate 14 is then spread over the PUR moisture-curing adhesive. Due to the low density of the mesh substrate 14, a layer of release paper is inserted during rewinding to prevent the PUR moisture-curing adhesive from seeping through and causing back adhesion due to uncured PUR moisture-curing adhesive.

[0032] The production process of the waterproof heat-sealing tape of this embodiment is as follows: 1. First, a transfer PU coating is prepared on the release paper using the transfer PU coating technology; 2. Then, the transfer PU coating is combined with the mesh substrate 14 using PUR moisture-curing adhesive to form a two-in-one waterproof composite material; 3. The release paper is removed, and the TPU hot-melt adhesive film 11 is laminated on the two-in-one composite material, and then cooled, matured and formed; 4. Finally, the tape is cut into strips according to the width size to obtain a three-in-one waterproof heat-sealing tape.

[0033] Example 3

[0034] like Figure 2 As shown, this embodiment further improves upon Example 2 by providing a thermochromic print layer 15 on the side of the mesh substrate 14 away from the PUR moisture-curing adhesive layer 13. The thermochromic print layer 15 is printed and dried using a PU printing paste containing thermochromic capsules. The thermochromic print layer 15 can indicate ambient temperature changes through its color change, thereby providing a temperature indicator. The PU printing paste containing thermochromic capsules is a known material and commercially available.

[0035] The above shows and describes 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 above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Waterproof heat-sealing tape, characterized by: The waterproof heat-sealing tape comprises a TPU hot-melt adhesive film, a waterproof layer, a PUR moisture-curing adhesive layer and a mesh base material from top to bottom. The waterproof layer is a TPU cast film or a transfer PU coating.

2. The waterproof heat-sealing tape according to claim 1, characterized in that: The mesh base material is a polyester warp-knitted mesh.

3. The waterproof heat-sealing tape according to claim 1, characterized in that: The mesh base material has a gram weight of 15 g / m 2 -45g / m 2 .

4. The waterproof heat-sealing tape according to claim 1, characterized in that: The thickness of the waterproof layer is 20 μm-50 μm.

5. The waterproof heat-sealing tape according to claim 1, characterized in that: The hot melt temperature of the TPU hot melt adhesive film is 80°C-110°C.

6. The waterproof heat-sealing tape according to claim 1, characterized in that: The thickness of the TPU hot melt adhesive film is 0.1mm-0.15mm.

7. The waterproof heat-sealing tape according to claim 1, characterized in that: The PUR moisture-curing adhesive layer is fully coated on the waterproof layer and embedded in the mesh of the mesh substrate.

8. The waterproof heat-sealing tape according to any one of claims 1 to 7, characterized in that: A thermochromic printing layer is provided on the side of the mesh substrate away from the PUR moisture-curing adhesive layer.

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