Composite board for packaging steel coil
By adopting a composite board packaging structure, combining medium density board, adhesive layer, braided fabric, co-extruded layer and polyethylene foam layer, the problem of insufficient friction is solved, and higher friction and stability is achieved while reducing costs.
Patent Information
- Application Number
- CN202421488045.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing steel coil packaging film is insufficient in friction during transportation, resulting in deformation and instability of the steel coil on special road surfaces.
A composite panel packaging structure is adopted, including a medium density panel, an adhesive layer, a braided fabric, a coextruded layer and a polyethylene foam layer, and the friction and support are improved through lamination bonding and double-face structure.
It improves the friction and stability of the packaging structure, prevents the steel coil from deformation and instability during transportation, and reduces costs, and has good chemical resistance and waterproofing effects.
Smart Images
Figure CN222819699U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of packaging and transportation, in particular to a protective device for a large steel coil. Background Art
[0002] If the steel coil encounters a special road surface during transportation, it will be subjected to stress and cause deformation of the steel coil. Therefore, the existing steel coils will be wrapped with a roll film of better material when packaging. In addition, some special steel coils require safer steel coil packaging films to ensure that the packaging film provides higher safety for the steel coils during transportation. The existing steel coil packaging is generally wrapped with galvanized sheets, iron sheets and other materials, but the cost is too high. The utility model patent with patent application number 2023222121629 discloses a waterproof steel coil packaging film, and the utility model with patent application number 2023202654071 discloses a special steel coil packaging film. Both of the above patent applications do not solve the problem of insufficient friction when packaging steel coils. Utility Model Content
[0003] In order to solve the above problems, the utility model discloses a composite plate for packaging steel coils.
[0004] The specific technical solutions are as follows:
[0005] A composite board for packaging steel coils comprises a medium density board, the front and back sides of the medium density board are both connected with adhesive layers by adhesives, the adhesive layer on one side of the medium density board is also provided with woven cloth, the woven cloth is connected to a co-extruded layer, the adhesive layer on the other side of the medium density board is also provided with woven cloth, the woven cloth is connected to a polyethylene foam layer; the co-extruded layer comprises a contact layer, a polyethylene and polypropylene blended film layer, a high-density foaming layer and an adhesive layer, the adhesive layer comprises a polypropylene film layer and a bonding resin arranged on the polypropylene film layer, and the adhesive layer and the adhesive layer are combined together by lamination.
[0006] The adhesive layer is a film composed of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer and low-density polyethylene copolymer.
[0007] The outer surface of the polyethylene foam layer is a double-fur structure.
[0008] Rough zones are provided on both sides of the outer surface of the contact layer.
[0009] The advantages of the utility model are: the co-extruded layer is divided into three co-extruded layers, and after each layer is connected together by pressing, the bonding layer and the adhesive layer are also connected together by pressing, which ensures the structural strength, and the medium-density board is set to provide a certain support for the packaging film, and the polyethylene foam layer as the inner side protects the steel coil. The structure has low cost and is supportive. The overall structure of the utility model is light and easy to package, and the co-extruded layer has good chemical resistance, which is convenient for storage and transportation. The addition of woven cloth has a waterproof effect, which can ensure that the structure is suitable for more weather conditions and increase the toughness of the structure. The contact layer and the rough belt can increase the friction to ensure that the steel coil does not move during packaging. The friction between each layer of the composite board of the packaging is increased and it is not easy to unfold, and the friction with the clamping tooling is increased to ensure the stability of the steel coil during transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0011] Figure 2 is a schematic diagram of the side structure of the contact layer;
[0012] Figure 3 This is a schematic diagram of the side structure of the polyethylene foam layer. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] A composite board for packaging steel coils, comprising a medium density board 1, wherein the front and back sides of the medium density board 1 are connected to an adhesive layer 2 by an adhesive, the adhesive layer on one side of the medium density board is further provided with a woven cloth 6, and the woven cloth 6 is connected to a co-extruded layer 3, and the adhesive layer on the other side of the medium density board 1 is also provided with a woven cloth 6, and the woven cloth 6 is connected to a polyethylene foam layer 4; the co-extruded layer 3 comprises a contact layer 34, a polyethylene and polypropylene blended film layer 31, a high-density foaming layer 32 and an adhesive layer 33, wherein the adhesive layer comprises a polypropylene film layer and a bonding resin arranged on the polypropylene film layer, and the adhesive layer 33 is bonded together with the adhesive layer 2 by lamination.
[0015] The adhesive layer 2 is a film composed of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer and low-density polyethylene copolymer.
[0016] The outer surface 4a of the polyethylene foam layer 4 is a double-fur structure. During packaging, the surface roughness between each layer of protection plates is large, which can prevent each layer of protection plates from unfolding. At the same time, the polyethylene foam layer 4, as the inner film of the last layer, is in direct contact with the steel coil, which can increase the adhesion between the inner film and the steel coil.
[0017] Rough belts 34a are provided on both sides of the outer surface of the contact layer. The purpose of providing the rough belts is that the steel coils can be bundled with straps after being finally packaged. The rough belts can increase the friction between the protection plate and the straps, making the straps more tightly bundled.
Claims
1. A composite plate for packaging steel coils, characterized in that: A medium density board is provided, wherein the front side and the back side of the medium density board are both connected with adhesive layers through adhesives, the adhesive layer on one side of the medium density board is also provided with woven cloth, and the woven cloth is connected to the co-extruded layer, and the adhesive layer on the other side of the medium density board is also provided with woven cloth, and the woven cloth is connected to the polyethylene foam layer; the co-extruded layer includes a contact layer, a polyethylene and polypropylene blended film layer, a high-density foaming layer and an adhesive layer, and the adhesive layer includes a polypropylene film layer and a bonding resin arranged on the polypropylene film layer, and the adhesive layer and the adhesive layer are combined together by lamination.
2. The composite plate for packaging steel coils according to claim 1, characterized in that: The adhesive layer is a film composed of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer and low-density polyethylene copolymer.
3. The composite plate for packaging steel coils according to claim 1, characterized in that: The outer surface of the polyethylene foam layer is a double-fur structure.
4. The composite plate for packaging steel coils according to claim 1, characterized in that: Rough zones are provided on both sides of the outer surface of the contact layer.