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Production method for a hot-melt film recycling air-bag scraps for shoes, and a hot-melt film produced using the method

A production method and technology of hot melt, applied in recycling technology, plastic recycling, application, etc., can solve the problem of not producing a three-layer structure hot melt film

Inactive Publication Date: 2012-07-11
朴喜大
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, until now, there has been no such research on thermoplastic polyurethane hot melt films, especially on the recycling of air bag waste to remanufacture hot melt films, in particular, no hot melt films with a three-layer structure have been produced. body membrane

Method used

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  • Production method for a hot-melt film recycling air-bag scraps for shoes, and a hot-melt film produced using the method
  • Production method for a hot-melt film recycling air-bag scraps for shoes, and a hot-melt film produced using the method
  • Production method for a hot-melt film recycling air-bag scraps for shoes, and a hot-melt film produced using the method

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specific Embodiment approach 1

[0032] refer to figure 1 , describes in detail the production method of the hot melt film of the single-layer structure of the first preferred embodiment of the present invention, and the hot melt film is used as a label mark pasted on the shoe.

[0033]Typically, each shoe will have a separate label attached to the inside of the shoe to display various information, such as the size of the shoe, the country of manufacture, and so on. Such a label is called a size label, and the film used for the above purpose is called a label tag film. After the required information is printed on the surface of the membrane, this membrane is heat-fused and pasted on the surface of the fabric located inside the shoe. There is no example where recycled TPU is used as such a film, therefore, in the present invention, the properties of the air bag waste are adjusted so that the air bag waste has a form suitable for the application purpose.

[0034] To tailor the properties to suit the applicati...

specific Embodiment approach 2

[0041] Such as figure 2 As shown, in the second preferred embodiment, the regenerated hot melt film having a double-layer structure has an air bag waste layer and a hot melt layer, which will be described in detail below.

[0042] The hot-melt film having a double-layer structure passes through a step of extruding a high-density TPU film on an upper layer, and simultaneously extrudes a hot melt on a lower layer by a co-extrusion method so as to provide a hot-melt property. In particular, a large amount of air bag waste is used as an upper layer of a hot-melt film without any attempt to enhance the environmental friendliness of the hot-melt film product until now. Table 3 shows the mixing ratios of the ingredients when producing the hot-melt film of the double-layer structure.

[0043] table 3

[0044]

[0045] In the hot melt mixing ratio of the lower layer (hot melt layer), the viscosity of the entire mixed resin is very important. Melt Flow Index (MI) - the most commo...

specific Embodiment approach 3

[0067] Such as Figures 3a to 3c As shown, in the third preferred embodiment, the hot melt film of the regenerated three-layer structure will be described in detail as follows. In the three-layer structure, the hot melt layer is arranged on the upper layer and the lower layer respectively, and the air bag A scrap layer or a TPU layer is arranged in the middle layer.

[0068] Conventional single-layer hot-melt films can cause problems when the two fabrics have different weaves. For example, when a low-density fabric and a high-density fabric are bonded together by a hot-melt method using a hot-melt film, the hot-melt melted by heating tends to attract the low-density fabric easily. Therefore, the hot melt concentrates on the fabric on one side, resulting in less adhesion.

[0069] In order to prevent the hot melt from concentrating on one side, such as Figure 3a with Figure 3b As shown, a hot-melt film with a double-layer structure was produced, with an air bag waste laye...

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Abstract

Provided is a method wherein TPU film scraps, which are generated in large volume in the shoe industry during the production of airbags used as materials for impact cushioning, are collected and are used by being reprocessed to create a hot-melt film by being mixed with other components so as to have the target properties possessed by hot-melt films; particularly with the aim of realising a method for producing a hot-melt film having a multi-layer structure by means of a co-extrusion method.

Description

technical field [0001] The present invention relates to a method of recycling shoe air bag waste to produce hot-melt films, and the hot-melt films produced thereby, and in particular, to a process that is collected before being discarded after use or for lower standards. The purpose is to recycle the air bag waste of shoes for the purpose of producing a hot melt film, mixing the air bag waste with other ingredients to make it have the desired properties of the hot melt film, and making the air bag waste by co-extrusion method Reprocessed into single-layer or multi-layer hot-melt films, and hot-melt films produced by this method. Background technique [0002] As we all know, in recent years, shoes, as a necessity of modern life, tend to develop towards modernization and fashion. Gone are the mainstream days of shoes that are simple and have no special functions, but recently, high value-added products with innovative functions in terms of wearing feel, impact reduction, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29D7/01B29C47/06B29C48/04B29C48/08
CPCB29L2022/027B29B17/0026B29K2075/00B29K2105/0097B29K2913/02B29C47/0021B29C47/065B29L2031/50B29K2105/26B29C47/0014B29B17/0042B29C47/128Y02W30/62B29C48/05B29C48/08B29C48/21B29C48/304Y10T428/31554B29C48/04B29B17/00B29D7/01B29C48/18
Inventor 朴喜大
Owner 朴喜大
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