Needling thermal composite foamed cotton

Abstract

The utility model discloses needle-punched thermal composite foamed cotton which comprises an inner layer and an outer layer, and glycerin monostearate gathering surface layers are arranged on the surfaces of the inner layer and the outer layer. Galling layers are arranged on the corresponding surfaces of the inner layer and the outer layer and comprise wool tops pulled up from the inner part of the inner layer and / or the outer layer and wool tops pulled up from the glyceryl monostearate gathering surface layer; the wool tops are heated and melted to form a bonding layer; and the bonding layer is provided with a cavity. The utility model has the advantages that: the hindrance caused by the accumulation of the glycerin monostearate on the surface layer to the integration of the glycerin monostearate is overcome; and the melting bonding layer is formed only through melting of the wool tops, so that the bonding strength is improved, the cavities are formed in the bonding layer, the elasticity of the whole material is improved, and the steel coil packaging material is particularly suitable for steel coil packaging with a damping effect.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials technology, specifically to a type of foamed cotton. Background Technology

[0002] Foam is widely used in the packaging technology field, especially in the field of steel coil transportation. Existing foam generally adopts a composite structure, namely an inner layer composed of PE foam and an outer layer also composed of PE foam. The thickness of the outer layer is generally less than that of the inner layer, and the surface of the outer layer is printed with markings or other functional layers; the inner and outer layers are integrated by heat fusion.

[0003] Glyceryl monostearate is produced by the esterification reaction of C16-C18 long-chain fatty acids with glycerol. It is a nonionic surfactant. It possesses both hydrophilic and lipophilic groups, exhibiting multiple functions such as wetting and emulsification. The pure product is a white, waxy solid that melts into a transparent liquid upon heating, with a freezing point not lower than 58°C. It is tasteless, odorless, and non-toxic. It is readily soluble in vegetable oils, soluble in hot ethanol, ether, chloroform, and acetone, but insoluble in water. It can emulsify with water, acting as a water-in-oil emulsifier. However, due to its strong emulsifying properties, it can also be used as an oil-in-water emulsifier. Commercially available products are usually white or slightly yellow, in powder or bead form.

[0004] In the production process of PE foam, glyceryl monostearate is required as a drip-reducing agent and anti-fogging agent; it is also used as a lubricant and antistatic agent.

[0005] In the production process of polyethylene (PE) foam, a certain proportion of glyceryl monostearate needs to be mixed in. After crystallization, a surface layer rich in glyceryl monostearate is formed on the surface of the PE foam. When the two types of PE foam need to be heat-sealed, the glyceryl monostearate on the surface will hinder the heat fusion bonding between the two. In order to ensure the heat fusion effect, the existing technology adopts methods such as increasing the heat fusion temperature and heat fusion pressure. The result of this method is that the thickness of the fused layer after heat fusion is large, which affects the elasticity of the product. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a needle-punched thermal composite foam, comprising an inner layer and an outer layer, both of which have a glyceryl monostearate aggregated surface layer on their surfaces; a napped layer is provided on the corresponding surfaces of the inner and outer layers, the napped layer comprising naps pulled up from the inside of the inner and / or outer layers, and also comprising naps pulled up from the glyceryl monostearate aggregated surface layer; all of the above naps are melted by heat to form an adhesive layer; the adhesive layer has voids.

[0007] The inner and / or outer layers may also have other layers.

[0008] The other layers are reinforcement layers.

[0009] The other layers are insulating layers.

[0010] The other layers are moisture-proof layers.

[0011] The advantages of this invention are: it overcomes the obstacle to melting into one piece caused by the aggregation of glyceryl monostearate on the surface; and it forms a molten adhesive layer simply by melting the wool strip, which not only increases the bonding strength, but also creates voids in the adhesive layer, improving the overall elasticity of the material. It is particularly suitable for packaging steel coils with shock absorption function. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the original inner and outer layers;

[0014] Figure 3 This is a schematic diagram of the inner and outer layers after roughening. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings. As shown in the drawings, a needle-punched thermal composite foam includes an inner layer 1 and an outer layer 2. Both the inner layer 1 and the outer layer 2 have a glyceryl monostearate aggregated surface layer, such as an inner layer glyceryl monostearate aggregated surface layer 11 and an outer layer glyceryl monostearate aggregated surface layer 21. Corresponding surfaces of the inner layer 1 and the outer layer 2 are provided with a napped layer. The napped layer includes nap strips pulled up from the inside of the inner layer and / or the outer layer, and also includes nap strips pulled up from the glyceryl monostearate aggregated surface layer, such as nap strip 101 pulled up from the inside of the inner layer, nap strip 111 pulled up from the inner layer glyceryl monostearate aggregated surface layer 11, nap strip 201 pulled up from the inside of the outer layer, and nap strip 211 pulled up from the outer layer glyceryl monostearate aggregated surface layer 21.

[0016] The aforementioned wool strips are all heated and melted to form an adhesive layer 3; the adhesive layer has voids 31.

[0017] The inner and / or outer layers may also include other layers 4. In this embodiment, only the outer layer has other layers, but it is not limited to this; the inner layer can also have other layers. Generally, the other layers are one or more of the following: a reinforcing layer, an insulating layer, and a moisture-proof layer.

[0018] There are many methods for processing the roughened layer. For example, rollers with barbs can be set on the inner and outer feed rollers of the heat sealing machine. The surface to be heat-sealed is scraped by the barbs to form a rough strip. During heat sealing, the heating zone 5 of the heating air directly heats the rough strip instead of the traditional heating of the entire heat-sealing surface, making it easier to melt. The melted rough strip is directly fused with PE material, overcoming the influence of glyceryl monostearate aggregated on the fusion. Since there are gaps between the rough strips, voids are formed between them. The existence of these voids improves the elasticity of the product and overcomes the defect of reduced elasticity caused by traditional surface-to-surface fusion.

Claims

1. A needle-punched thermal composite foam, comprising an inner layer and an outer layer, wherein the surfaces of both the inner and outer layers have an aggregated surface layer of glyceryl monostearate; characterized in that: The inner and outer layers are provided with a roughened layer on their corresponding surfaces. The roughened layer includes hair strips pulled up from the inside of the inner and / or outer layers. The hair strips are all heated and melted to form an adhesive layer. The adhesive layer has voids.

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