CN2390833Y - Plastic sheets for packaging steel - Google Patents

Abstract

The utility model relates to a plastic sheet for packaging steel. The adopted plastic sheet is in a multilayer structure and is composed of a surface layer and a sandwich layer which are pressed in high temperature and bonded together or are pressed in high temperature and squeezed together, wherein, a surface layer is made of polyethylene plastic, and a sandwich layer is made of reworked plastic or is in a staggered and overlapped mixed structure composed of the reworked plastic layer and the polyethylene plastic layer. The multilayer structure of the sheet can adopt the three-layered structure, or the five-layered structure, or the seven-layered structure, and the sandwich layer can be inserted with a reinforcing rib or a metal net layer or a fiber net layer, which have the same function of the reinforcing rib. The utility model has the advantages of novel structure, reasonable design, shock-resistant ability, pressure resistant and bend resistant performances, the capability of not being broken easily and being reworked, and can be made into the packaged articles with different shapes.

Description

Plastic sheets for steel packaging

The utility model relates to a product for steel packaging, in particular to a plastic plate for steel packaging.

It has been proved feasible in practice that plastic packaging products replace essential packaging products and metal packaging products as steel packaging products. Plastic products have good performance, are light in weight, cheap, and easy to manufacture. As the packaging of steel, plastic products have their disadvantages, and their strength is not as good as metal products. Therefore, some manufacturers are constantly improving it when producing plastic products for steel packaging, and strive to improve its pressure resistance and impact resistance. The usual method now is to use polyethylene plastic as the main processing raw material, add additives according to a certain ratio, and process it into the required steel packaging products according to the relevant processes of plastic product manufacturing. In order to reduce costs and ensure product quality, In the production process, polyethylene raw materials and recycled plastic raw materials are often mixed together in proportion, fused at high temperature, and hot-pressed. Some manufacturers also find ways to add additives and auxiliary materials in order to save production costs, such as improving the proportion of raw materials and using recycled plastics as the main raw materials to produce plastic products for steel packaging. As far as the applicant knows, the plastic sheets currently used for steel packaging are only improved in the proportion of raw materials used for processing and in the production process, but do not pay attention to the improvement of the product structure. When the plastic sheet is in use, after being subjected to a certain impact and bending, it sometimes cracks and ruptures, and in severe cases, it can also partially fracture, thereby affecting the quality of the steel being packaged.

The purpose of this utility model is to improve the above-mentioned deficiencies in the prior art, and to propose and design a new plastic sheet for steel packaging.

The technical solution of the utility model is to adopt a plastic sheet, which is characterized in that the sheet is composed of a surface layer and a core layer, and the surface layer and the core layer are thermally bonded together to form a multilayer structure sheet.

It is characterized in that the surface layer is a polyethylene plastic layer.

It is characterized in that the core layer is a recycled plastic layer.

It is characterized in that the core layer adopts a core layer of a multi-layer hybrid structure in which a layer of recycled plastics and a layer of polyethylene plastics are interlaced and bonded together by thermocompression.

It is characterized in that the multi-layer structure plate includes the surface layer and the core layer of the multi-layer hybrid structure, which is a five-layer structure plate.

It is characterized in that the multi-layer structure sheet includes the surface layer and the core layer of the multi-layer hybrid structure, which is a seven-layer structure sheet.

It is characterized in that the thickness of the plate of the multi-layer structure is 0.8-8 mm.

It is characterized in that reinforcing ribs are placed in the core layer.

It is characterized in that fiber mesh or metal mesh is placed in the core layer.

The utility model has the advantages of adopting a multi-layer structure sheet, and plastic sheets of the same material are laminated together and extruded by hot pressing, which increases the toughness and ductility of the plastic sheet, and its pressure resistance and bending resistance are superior to those of the plastic sheet. Existing plastic sheets for steel packaging can also be processed into flat packages of different shapes for steel packaging. The utility model can be used as an inner lining plate and a backing plate for steel packaging, as well as guard plates and edge guards of different shapes produced through secondary processing. It uses plastic products instead of metal products and wooden products as packaging materials for steel packaging, and partially uses recycled materials and recycled materials from waste plastics, which reduces production costs, and adopts multi-layer structure boards to ensure product quality. There are three-layer, five-layer and seven-layer structure sheet boards with a multi-layer structure, and their thickness varies from thick to thin, which can be applied to different packaging requirements of various steel materials. Its structure is novel, its design is reasonable, its performance is better than the existing plastic products for steel packaging, and it has wide application prospects.

Fig. 1, the basic structural representation of the utility model

Fig. 2, the basic structure top sectional view of the present utility model

Fig. 3, the second structural representation of the embodiment of the utility model

Fig. 4, the third structural representation of the embodiment of the utility model

Fig. 5, the structure schematic diagram of the embodiment of the utility model four

Fig. 6, the fifth of the structural representation of the embodiment of the utility model

As shown in Fig. 1 and Fig. 2, one of the embodiments of the present utility model adopts a plastic plate structure, and the plate is composed of surface layers 1, 3 and core layer 2. The surface layers 1, 3 and the core layer 2 are stacked, and the core layer 2 is sandwiched between the surface layers 1, 3, bonded together by heat and pressure to form a multi-layer structure sheet. Wherein, the surface layers 1 and 3 adopt polyethylene plastic layers, and the core layer 2 adopts recycled plastic layers. The specification of the plastic sheet board that this embodiment adopts is the three-layer plastic sheet board of thickness of 0.8-8 millimeter.

As shown in Figure 3, the plastic sheet structure used in the second embodiment of the present utility model is also the surface layer 1, 3 sandwich layer 2, but the core layer 2 has adopted two layers of recycled plastic 4 and material 5 to overlap Together, the core layer of the multi-layer hybrid structure bonded by thermocompression, the core layer of the multi-layer structure used by the plastic sheet is composed of a layer of polyethylene plastic sandwiched between two layers of recycled plastic 4, this plastic sheet The board includes the surface layer 1, 3 and the core layer of the multi-layer hybrid structure, which is a plastic sheet board with a five-layer structure. The plastic sheet is extruded at one time by a hot press co-extrusion process. The standard thickness of the sheet of the multi-layer structure is 0.8-8 mm.

As shown in Figure 4, the third embodiment of the utility model is based on one of the embodiments of the utility model, so that the core layer 2 adopts the core layer of the multi-layer hybrid structure of the five-layer sandwich, that is, the core layer 2. Three layers of recycled plastic 4 and two layers of polyethylene plastic 5 are interlacedly laminated and bonded together by hot pressing. Among them, the second layer of recycled plastic 4 is outside, and the second layer of polyethylene plastic 5 is sandwiched by a layer of recycled plastic 4. Combined to form a core layer of a multi-layer hybrid structure, the core layer of this multi-layer structure is placed between the surfaces 1 and 3, and bonded together by heat and pressure to form a seven-layer plastic sheet. The thickness specification of the plastic sheet is 0.8-8 mm.

As shown in Figure 5, the fourth embodiment of the present utility model is based on the first embodiment, and the core layer 2 sandwiched between the surfaces 1 and 3 is provided with reinforcing ribs 6 to increase the strength of the utility model. Strength and toughness of the plastic sheet The sheet thickness specification of the multi-layer structure is 0.8-8 mm.

As shown in Figure 6, the fifth embodiment of the present utility model is embedded in the core layer 2 between the surface layers 1 and 3 on the basis of the first embodiment. Mesh structure, so that in the hot pressing process, the part separated by the fiber net of the core layer 2 can be bonded together through the mesh on the fiber net, and the fiber net that is integrated with the fiber net 7 can be used Metal mesh alternative. The standard thickness of the multilayer structure sheet adopted in this embodiment is 0.8-8 mm.

Embodiment 1, embodiment 2, embodiment 3, example 4, embodiment 5 that the utility model proposes except the backing plate that the plastic plate that embodiment 5 adopts is directly used as the backing plate of steel packing, lining plate, also can according to actual needs, carry out Secondary reprocessing to make guard plates of various shapes and packages of different shapes.

Claims (9)

1. packaging steel plastic sheet plate adopts the plastic sheet plate, it is characterized in that, the sheet plate is made of superficial layer (1), (3), sandwich layer (2), and superficial layer (1), (3) and sandwich layer (2) heat pressure adhesive constitute the sheet plate of multiple-structure together.

2. packaging steel plastic sheet plate according to claim 1 is characterized in that superficial layer (1), (3) are the vinyon layer.

3. packaging steel according to claim 1 is characterized in that with moulding section's sheet plate sandwich layer (2) is the regenerated plastics layer.

4. packaging steel plastic sheet plate according to claim 1 is characterized in that, sandwich layer (2) has adopted the staggered sandwich layer that stacks the multilayer hybrid structure of heat pressure adhesive of one deck regenerated plastics (4) and layer of polyethylene plastics (5).

5. packaging steel plastic sheet plate according to claim 4 is characterized in that, the sheet plate of multiple-structure comprises the sheet plate of the sandwich layer of superficial layer (1), (3), multilayer hybrid structure for five-layer structure.

6. packaging steel plastic sheet plate according to claim 4 is characterized in that, the sheet plate of multiple-structure comprises the sheet plate of the sandwich layer of superficial layer (1), (3), multilayer hybrid structure for seven-layer structure.

7. packaging steel plastic sheet plate according to claim 1 is characterized in that the thickness of the sheet plate of multiple-structure is the 0.8-8 millimeter.

8. packaging steel plastic sheet plate according to claim 1 is characterized in that, has placed reinforced rib (6) in the sandwich layer (2).

9. steel plate packaging plastic sheet plate according to claim 1 is characterized in that, has placed fleece (7) or metal stratum reticulare in the sandwich layer (2).

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