WO2011162426A1

WO2011162426A1 - Method for manufacturing thermoplastic polyurethane multi-layer film without using release paper or release film, and a thermoplastic polyurethane multi-layer film not using release paper or release film manufactured by the method

Info

Publication number: WO2011162426A1
Application number: PCT/KR2010/004081
Authority: WO
Inventors: 박희대
Original assignee: Park Hee-Dae
Priority date: 2010-06-22
Filing date: 2010-06-23
Publication date: 2011-12-29
Also published as: KR20110138764A; KR101318137B1

Abstract

The present invention aims to realize a method of manufacturing thermoplastic polyurethane film without using release paper or release film. Preferably, uneven shapes can be formed in the surface of the film, which is extruded from a T-die mechanical apparatus, by adjusting the surfaces of a touch roller and a cooling roller, and ultimately, when the film is wound, this plays a role in reducing the surface area in contact with the surface of an opposing film such that the adhesive force between the films can be drastically lowered, and this characteristic of the product makes smooth production possible even without release paper or release film. The production method of the present invention is advantageous in that the product can be called very environmentally friendly since release paper or release film waste generated when the film is finally used can be completely eliminated, and in that direct economic effects can also be obtained from reducing production costs because the release paper or release film is not used.

Description

[Specifications

[Name of invention]

Method for producing thermoplastic polyurethane multilayer film without release paper or release film and thermoplastic polyurethane multilayer film without release paper or release film produced by the above method

Technical Field of the Invention

The present invention relates to a method for manufacturing a thermoplastic polyurethane film having a multi-layer structure, and more particularly, without using a release paper or a release film used to prevent sticking between films generated when the final film product is wound. The present invention relates to a method for producing a thermoplastic polyurethane multilayer film and a thermoplastic polyurethane multilayer film which does not use a release paper or a release film prepared by the above method.

Background of the Invention

Shoes, which are a necessity of modern life, have become more and more recently advanced and fashioned. In the past, simple products with simple functions and no special functions have become mainstream, but recently, high value-added products with innovatively improved ignition, stratification, and light weight have become mainstream. As living standards improve, there is an increasing demand for them. Also shoes It is part of this fashion, and various designs of shoes have been developed, and new concepts have been incorporated into the development of shoes.

On the other hand, there have been various attempts to reduce the weight and simplify the manufacturing process as one of the main concerns of development. In order to achieve the purpose of weight reduction, we studied how to use light materials or change the design to produce similar effects with small amounts of materials. In order to simplify the manufacturing process, a lot of researches are recently conducted on the technology of manufacturing shoes by simply gluing without sewing or simplifying the sewing process that requires the most manpower and time in the manufacturing process. It is partly applied and is increasing rapidly.

In order to achieve this purpose, a method of using a hot melt film has been continuously developed. The hot melt film is inserted between the materials to be attached to each other, and then heat and pressure are used to fusion. Only a few seconds, the adhesion between the fabric and the fabric can be completed, which can drastically reduce the process cost. As the sewing thread is not revealed, shoes with a better appearance can be manufactured in terms of design. This manufacturing method is called a no sew manufacturing process. The non-sewing manufacturing process has been applied steadily due to the economic effect of reducing manufacturing costs and the advantages of light weight, and derivative technologies are constantly developing and introducing various products. Among the recent trends, multilayer polyurethane is extruded with a multilayer extruder, so that the properties of each layer are designed differently according to the application. The case where the polyurethane film is applied is increasing rapidly.

As a representative example, there is a two-layered thermoplastic polyurethane film in which a thermoplastic polyurethane having a high heat resistance temperature constitutes one layer and a thermoplastic polyurethane-based hot melt resin having a low heat resistance temperature is composed of another layer.

Looking at the manufacturing process of the product (that is, the thermoplastic polyurethane film of the two-layer structure), first, the thermoplastic polyurethane resin having a high heat resistance temperature is extruded on a release paper or a release film. Next, the thermoplastic polyurethane resin having a low heat resistance is extruded once more on the thus prepared film (ie, a release paper (or a release film) + a thermoplastic resin having a high heat resistance temperature). As a result, a thermoplastic polyurethane multilayer film produced by a non-sealing process consisting of "release paper (or release film) + high temperature resistant thermoplastic polyurethane resin + low temperature resistant thermoplastic polyurethane resin" is produced.

On the other hand, the final product of the same shape, but also as a manufacturing method of Daron, a high-temperature thermoplastic polyurethane resin and a low-heat-resistant thermoplastic polyurethane resin can be extruded simultaneously at the same time through a multilayer film extruder on a release paper. . In the former case, two extrusion processes are performed. In the latter case, the same type of product is manufactured by one extrusion.

The film thus produced is used as a material for manufacturing shoes in the shoe manufacturing process. The shoe is divided into various parts, and the part to which the film is applied is the upper corresponding to the part covering the sole. General to manufacture the upper Looking at the process, first cut the film to a predetermined size, and then put the cut film on the desired portion of the top of the fabric and then crimped with a hot press of 130 ^° C or more to the fabric 원단 After the release paper attached to the surface of the film Or remove the release film to complete. Alternatively, the release paper or release film may be removed first before the heat press, and then the heat press may be performed.

Depending on the design of the shoe, the heat press process may be completed at one time or several heat presses may be repeated by adding film to another part. In any case, the manufacturing of the upper is finished by heat press, and then, in this way, the upper made of various fabrics is processed into a three-dimensional form. Finally, it is glued with a sole to complete the final shoe product.

However, when using the conventional release paper or release film as described above, the end product user must remove these release paper or release film during the use process, and a large amount of waste due to release paper or release film which is not necessary for these end products. This results in occurring. This is in contrast to the recent growing interest in environmentally friendly products and production methods, which is a problem that is actually encountered in the manufacturing process of various industries. In addition, there is an advantage in that the release film is more recyclable than the release paper, but this also consumes a lot of energy during the regeneration process, which is not environmentally friendly.

[Brief Description of Drawings] 1 is a view showing a method for manufacturing a thermoplastic polyurethane multilayer film without using a release paper or a release film according to an embodiment of the present invention.

FIG. 2 is a view illustrating a state in which a thermoplastic polyurethane multilayer film not using a release paper or a release film manufactured by the method illustrated in FIG. 1 is wound.

[Detailed Description of the Invention]

The present invention is to solve the conventional problems as described above, in the production of a thermoplastic polyurethane multilayer film method for producing a thermoplastic polyurethane multilayer film without this release paper or release film used for the convenience of film production and It is an object of the present invention to provide a thermoplastic polyurethane multilayer film that does not use a release paper or a release film produced by the above method.

In addition, the present invention is to extrude a thermoplastic polyurethane of a relatively high component with a high cooling rate with a hot melt composed of a slow cooling and soft composition when extruding a multilayer thermoplastic polyurethane film without release paper or release film To provide a method for producing a thermoplastic polyurethane multilayer film that can withstand the tension generated by the machine to enable film production, and to provide a thermoplastic polyurethane multilayer film that does not use a release paper or a release film prepared by the above method. There is a purpose. In addition, the present invention is a matte or semi-gloss form of the surface of the film in order to prevent the adhesion between the film surface and the adhesion between the roll surface and the film generated when the film is rolled and rolled thermoplastic polyurethane multilayer film By using an extruder, a method for producing a thermoplastic polyurethane multilayer film without using a release paper or a release film that can prevent the adhesive force between them to achieve smooth winding and unwinding, and a release paper or a release film produced by the above method. It is an object to provide a thermoplastic polyurethane multilayer film that is not soluble. The present invention uses a release paper or a release film using a touch roller and a first and second cooling rollers, which constitute a conventional tea die and compress and cool the thermoplastic polyurethane resin and the hot melt extruded through the tea die. In the method of manufacturing a thermoplastic polyurethane multilayer film without a step, the process of matting or semi-glossing the surface of the touch roller, forming a concave-convex shape on the surface of the first cooling furnace, and the touch roller and the When the thermoplastic polyurethane resin and the hot melt is passed through the first cooling roller while being extruded, it is characterized in that the process of forming a concave-convex shape on the surface of the hot melt.

Hereinafter, a preferred embodiment of the present invention will be described in detail. In the following description, representative embodiments of the present invention will be presented in order to achieve the above technical problem. In the following description, specific embodiments of the present invention will be described with reference to FIGS. 1 and 2.

In the present invention, a thermoplastic polyurethane multilayer in which hot melt is usually bonded A method of manufacturing a thermoplastic polyurethane multilayer film without using a separate release paper or a release film that is necessarily used when the film is extruded, and a thermoplastic polyurethane multilayer film that does not use a release paper or a release film manufactured by the above method. We want to implement

Preferably, thermoplastic polyurethane multilayer film from conventional tee-dies

By adjusting the surface of the touch roller and the cooling roller (preferably the first cooling roller) used when extruding (hereinafter referred to as "film"), various irregularities may be formed on the surface of the film. As a result, when the film is wound, it plays a role of reducing the surface area in contact with the surface of the opposite film, thereby producing a thermoplastic polyurethane multilayer film without using a release paper or a release film that can drastically lower the adhesive force between the films. And a thermoplastic polyurethane multilayer film using no release paper or release film prepared by the method. The thermoplastic polyurethane multilayer film produced in this way is a very eco-friendly product because it can completely remove waste such as release paper or release film, which was generated when the film is finally used, and also uses the release paper or release film. There is a feature that can reduce the production cost.

On the other hand, in the case of a film of 0.5 mm or less, which is a very thin film such as a film used for hot melt, it is very difficult to produce a film of precise thickness and width due to the mechanical tension of the tee-die extrusion production apparatus. However, when using a multi-layered T-die extruder, a relatively fast cooling thermoplastic polyurethane The resin could be used together to withstand the tension exerted by the machine.

In particular, in the present invention, the surface of the first cooling furnace is roughened (embossed) so that the thermoplastic polyurethane resin and the hot melt (specifically, the thermoplastic polyurethane hot melt) in the molten state exiting the tee-die are subjected to the first cooling. In the process of cooling in contact with the first uneven shape of the cooler to form the same uneven shape on the surface of the hot mat it is possible to manufacture a thermoplastic polyurethane multilayer film without using a release paper or a release film.

At this time, a touch roller for pressing the resin (thermoplastic polyurethane and hot melt) and a second cooling roller for simple cooling are arranged on both sides of the first cooling roller, and the rollers are tee-diesed by the rollers. The resin exiting is made of a thermoplastic polyurethane multilayer film that does not require a separate release paper (or release film). In this case, it is preferable to use a silicon-type lor of the matte or semi-glossy form, and the first cooling lor and the second cooling lor may preferably use a cooling lorlor of steel or Teflon material.

As described above, the surface of the touch roller was matted or semi-glossy or the system 1 was cooled to emboss the surface of the roller so that a desired pattern was transferred to the surface of the film. The embossed film is reduced in the outermost surface area is to prevent the adhesion with the opposite film surface when rolling. Therefore, a thin thermoplastic thermoplastic multilayer film can be extruded without using a release paper or a release film. It is. Hereinafter will be described in detail based on the preferred embodiment of the present invention, the present invention is not limited by the embodiment.

{Example 1}

In Table 1 below, when extruded a thermoplastic polyurethane multilayer film without using a release paper or a release film, the composition of the upper layer and the lower layer was concretely presented, and also when the film was extruded using a T-dice device. The configurations of the touch roller and the first cooling lor used are described in detail.

[Table 1]

The working silver conditions when extruding the thermoplastic polyurethane film using the resin are shown in Table 2, and the results of testing the physical properties of the multilayer film are shown in Table 3.

Table 2

TABLE 3 Upper layer: 10 (m, lower layer: 150 // m

300% modulus 80kgf / cnf

Tensile strength 250kgf / cnf

Elongation 700%

Tear strength 70kgf / cm As shown in Example 1 above, the thickness of each layer and the entire film is 10 (Γ300) ™ in the upper layer, and 100-300 / m in the lower layer can be produced without any problem. It was possible to produce products above and below.

At this time, the touch roller is a room temperature vulcanized (hereinafter referred to as "RT") touch roller is preferably used, the mesh processing surface steel roller (ie, the first cooling roller) is 12 (Γ 130 mesh The milled roller is used as well as the meshed steel roller as well as the sanded steel roller.

As a result, a two-layer film consisting of a thermoplastic polyurethane upper layer matted by a matte silicon RTV touch roller and a thermoplastic polyurethane hotmelt underlayer treated by a mesh steel roller (ie, a first cooling roller) was produced. The film was prepared without this release paper and release film, there is no problem in the unwinding of each roller because there is no surface adhesion. In addition, there is no release paper and release film, so there is no waste generated in the heat press process.

On the other hand, in some cases, a yellowing master batch, a color master batch for producing color, and a small amount of additives (for example, waxes or flow improvers) for improving film formability may be used in a small amount.

{Example 2} Table 4 presents the composition of the upper layer and the lower layer when extrusion molding a thermoplastic polyurethane multilayer film without using a release paper or a release film, and also a touch roller and a first cooling roller used when extrusion molding the multilayer film. Are described in detail.

Table 4

The working temperature conditions when extrusion molding the thermoplastic polyurethane film using the resins shown in Table 4 are shown in Table 5, and the results of testing the physical properties of the multilayer film are shown in Table 6.

TABLE 5

TABLE 6

In Example 2, the thermoplastic polyurethane hot melt used in the lower layer used a product having a higher hardness. There was only a slight change in the film final physical properties, but there was no difference in extrusion workability and final product appearance. Similar to Example 1 described above, the thermoplastic polyurethane was matted by a matte silicon RTV touch roller. Two layers of films were prepared, consisting of an upper layer and a lower layer of thermoplastic polyurethane hotmelt treated by a mesh steel roller (ie, a first chill roller).

{Example 3}

Table 7 below shows the composition of the upper layer and the lower layer when extrusion molding a thermoplastic polyurethane multilayer film, and also the configuration of the touch roller and the first cooling roller used when extruding the multilayer film in detail. Presented.

[Table 7]

Extrusion working temperature conditions when extruding a thermoplastic polyurethane film having a multilayer structure using the resin are shown in Table 8, and the results of testing the physical properties of the multilayer film are shown in Table 9.

[Table 8]

[Table 9]

In Example 3 above, the thermoplastic polyurethane resin used in the upper layer was Used a higher product. Likewise, only slight changes were made in the film final physical properties, but there was no difference in extrusion workability and final product appearance. Similar to Example 1 described above, a two-layer layer consisting of a thermoplastic polyurethane upper layer matted by a matte silicon RTV touch roller and a thermoplastic polyurethane hot melt underlayer treated by a mesh steel roller (ie, a first cooling roller) The film was made.

{Example 4}

In Table 10 below, when extrusion molding a thermoplastic polyurethane multilayer film without using a release paper or a release film, the composition of the upper layer and the lower layer was specifically presented, and the touch roller used when the multilayer film was extruded. And the first cooling roller were described in detail, respectively.

Table 10

Extrusion working temperature conditions when extruding a thermoplastic polyurethane film having a multilayer structure using the resin are shown in Table 11, and the results of testing the physical properties of the multilayer film are shown in Table 12.

Table 11

Table 12 Upper level: ΙΟΟ _/ , Lower level: 15 (m

300% modulus lOOkgf / cnf

Tensile strength 350kgf / cnf

Elongation> 600%

Tear strength 90 kgf / cm In Example 4, a semi-gloss silicon RTV touch roller was used instead of the matte silicon RTV touch roller.

[Industrial Applicability]

The present invention can eliminate the waste generated during the shoe manufacturing process by not using a release paper or a release film, which can lower the manufacturing cost of the film and also reduce the costs that may occur in the reprocessing and disposal of the waste Not only can it generate carbon dioxide during the reprocessing process, but it also has the advantage of eliminating the environmental impact of disposal.

Claims

[Claim]

[Claim 11

Without using a release paper or a release film by using a touch roller and a first and second cooling rollers that constitute a conventional tea die and compress and cool the thermoplastic polyurethane resin and the hot melt extruded through the tea die. In the method of manufacturing a thermoplastic polyurethane multi-layer film,

Adjusting surface roughness of the touch roller and the first cooling roller; When the thermoplastic polyurethane resin and the hot melt are passed between the touch roller and the first cooling roller while being extruded, a release paper or a release film is used, characterized in that the uneven shape is formed on the surface of the hot melt. To produce a thermoplastic polyurethane multilayer film.

[Claim 2]

The method of claim 1,

Method of manufacturing a thermoplastic polyurethane multilayer film without using a release paper or a release film, characterized in that the surface of the touch roller is matt or semi-gloss treatment.

[Claim 3]

The method of claim 2 The touch roller is a method of manufacturing a thermoplastic polyurethane multilayer film without using a release paper or a release film, characterized in that made of a silicon material.

[Claim 4]

In that U term,

Method of producing a thermoplastic polyurethane multilayer film without using the release paper or the release film, characterized in that the irregularities are formed on the surface of the first cooling roller.

[Claim 5]

The method of claim 4,

Method for producing a thermoplastic polyurethane multilayer film without using a release paper or a release film, characterized in that the surface of the first cooling roller is processed to 120 ~ 130 mesh.

[Claim 6]

The method according to claim 4 or 5,

The first cooling system is a method for producing a thermoplastic polyurethane multilayer film without using a release paper or a release film, characterized in that made of steel or Teflon material. [Claim 7]

A thermoplastic polyurethane multilayer film which does not use this paper or o-type film produced by the method of any one of claims 1 to 6.