CN108720180A - Improved shoe-making assembly method and correction solution applied - Google Patents

Abstract

The invention provides an improved shoe making assembly method and a correction solution applied, which mainly realize the management method of the viscosity of a TPU (thermoplastic polyurethane) adhesive by adding correction solutions with different concentrations into the TPU adhesive with single viscosity according to the porosity or density of an adhesive material, so as to overcome the problem that various types of adhesives need to be stored and managed and simplify the assembly steps.

Description

Improved shoe-making assembly method and correction solution for its application

technical field

The present invention relates to a manufacturing method of footwear, in particular to an assembly step of shoe making. The present invention also relates to a correction solution applied in the aforementioned shoe assembly step.

Background technique

The general manufacturing method of footwear includes many steps and procedures, one of which is to connect the sole made of rubber and EVA (polyethylene vinyl acetate) to the upper material (substrate), and connect the sole and the upper Adhesively assembled together, the material of the aforementioned upper can be PU (polyurethane), synthetic leather, leather, mesh structure or fabric;

In order to achieve a reliable and firm bond between the upper and the sole, each part of the shoe (sole, upper) needs to be subjected to a continuous pretreatment process, such as: degreasing, polishing, painting, oven heating, marking and painting. Coating glue, and the above procedure of coating glue can be applied to the sole or the upper alone, and can also be applied to the sole and the upper at the same time;

Adhesives commonly used in shoemaking are adhesives suitable for PU (polyurethane), which can be presented in different forms, such as: solutions, adhesives, hot-melt films and powdered hot-melt adhesives (TPU-thermoplastic PU) and other types.

Among them, using solution, adhesive as solvent/water-based adhesive to "form" and apply, will produce a wet layer thickness of about 100-200 microns before the aforementioned adhesive is dried, and after the adhesive is dried and activated, its thickness is 20- 60 microns, therefore, in the case of applying a thick adhesive layer, it takes a very long drying time and consumes high energy; conversely, in the case of a thin adhesive layer, it may cause Insufficient adhesion or even failure (adhesive surface air cavity), for the aforementioned reasons, a single layer of solvent/water-based adhesive applied to a single surface cannot provide proper adhesion of shoe parts (sole and upper).

In order to solve the aforementioned problems, the solution in the industry is to apply the adhesive/adhesive layer on the sole and the upper at the same time. In some special cases (depending on the characteristics of the material), it is necessary to apply the Appropriate amount of adhesion can only be achieved by coating two layers of adhesive on the upper and upper of the shoe respectively.

A good adhesive between the sole and the upper part is to use a powder hot-melt thermoplastic polyurethane (TPU) adhesive, such as the US Patent Application No. 20140093655 shoe part bonding method applied by Orisol, which uses thermoplastic polyurethane (TPU) powder glue.

Due to the chemical properties of thermoplastic polyurethane (TPU), it does not need to go through the solvent/water evaporation process and can only be applied in a single layer with a thickness of 100 to 500 microns, so it can be coated on only one side (sole and One side of the shoe upper), and then stick to the surface of the shoe material by coating on a viscous liquid layer or through electrostatic force technology, so that it can adhere to the shape of any 3D substrate.

It is suitable for bonding any type of shoe material (porous or dense), and it is environmentally friendly and does not emit toxic solvents (VOC) during a short-term activation process.

Although the TPU material has the aforementioned advantages, there may be some limitations, such as:

In order to achieve proper bonding between the sole material (material coated with TPU adhesive) and the upper material, it is necessary to have a coating composition suitable for various upper materials or different types, and each coating composition has Specific viscosity to match the porosity of the upper materials to be bonded.

For example, porous shoe upper substrates (such as mesh) that are prone to glue penetration may require a high viscosity primer (3000-6000cP) to fill the pores;

The low viscosity primer (less than 3000cP) will penetrate to the bottom of the mesh without forming a continuous adhesion on the surface of the mesh. Therefore, materials with high density may need to be treated with a low viscosity primer solution first, so that the treatment agent Allows for easier penetration into material pores.

In order to be able to "handle" shoe upper materials corresponding to different characteristics, different types of treatment agents must be processed and managed to meet the needs of different materials, which will cause inventory problems and expiration date problems, which will cause expensive costs .

In addition, in the conventional shoe-making assembly steps, both the sole and the upper need cumbersome pretreatment, and the specific implementation method is shown in Figure 1:

The sole must be executed in sequence: sole cleaning step 51, sole sole brushing step 52, sole coating viscous liquid step 53, and powder coating step 54;

The shoe upper must be executed in sequence: cleaning step 61, marking step 62, coating treatment step 63, second baking step 64;

The drying treatment step 71 and the assembling step 72 can only be performed after the aforementioned pretreatment steps are performed on the sole and the upper, and the process is quite cumbersome.

Contents of the invention

The present invention provides an improved shoe-making assembly method, the main purpose of which is to be able to bond different types of shoe lining materials through a single type of TPU adhesive/adhesive to overcome the need to store and manage various types of adhesives The problem.

To achieve the aforementioned purpose, the improved shoe-making assembly method of the present invention includes:

The sole cleaning step is to clean the surface of a sole so that the surface of the sole can be coated with TPU powder;

The step of painting the sole is to apply the primer so that the surface of the sole can be coated with TPU powder;

In the step of coating the viscous liquid on the sole, apply a viscous or conductive liquid layer to the relevant painting process;

In the step of coating TPU powder on the sole, the TPU powder is coated on the viscous or conductive liquid layer, and the TPU powder can provide adhesion by the viscosity of the viscous liquid layer or the static electricity of the conductive liquid;

Adjustment step, applying the correction solution to the TPU powder;

A shoe upper cleaning step, cleaning a shoe upper to be assembled;

Drying treatment step, heating to dry the correction solution and activate the TPU powder; and

The assembly step connects the pressed sole surface and the upper.

The present invention also provides a correction solution, comprising:

Adding plasticizer or adjusting solvent in an amount of 5-90%;

2-15% cross-linking agent added;

Surfactant added in an amount of 0.01-2%;

The added amount is an appropriate amount of carrier, so that the sum of the three is 100%.

The present invention enables to overcome the problem of having to store and manage various types of adhesives, while also simplifying the procedure, by applying a modified shoe assembly method using a correction solution.

Description of drawings

FIG. 1 is a schematic diagram of the required work flow in the assembly process of conventional rubber sole and shoe upper materials.

Fig. 2 is a schematic diagram of a preferred workflow of the rubber sole and upper material of the present invention in the assembly process.

3 is a schematic diagram of another assembly workflow of the rubber sole and upper material of the present invention.

Fig. 4 is the composition contained in the TPU adhesive used in the assembly process of the rubber sole and upper material of the present invention.

Explanation of symbols in the accompanying drawings:

Sole cleaning step 51

Sole Sole Painting Step 52

Coating Viscous Liquid on Sole Step 53

Coating Powder Step 54

Cleaning steps 61

Labeling Step 62

Coating Processing Step 63

Second Baking Step 64

Drying Process Step 71

Assembly steps 72

Sole Cleaning Step A

Sole painting step B1

Step B2 of viscous liquid coating on shoe soles

Sole coating TPU powder step C

Adjustment step D

Upper Cleaning Step E

Drying process step F

Assembly step G

Judgment step H

Correction Solution 10

Single viscosity TPU adhesive 20

Plasticizer 111

Adjusting solvents 112

Crosslinker 12

carrier 13

Surfactants 14

TPU Adhesive X

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Each hot-melt thermoplastic polyurethane (hereinafter referred to as TPU) is characterized by the viscosity generated at the activation temperature, which is the temperature reached by the TPU substance during the bonding process.

The TPU adhesive applied to the base shoe material (rubber sole in this example) must adjust the viscosity according to the porosity of the shoe material to be bonded (such as the upper material), and the porous substrate material that is easier for the glue to penetrate needs to be coated. Cover with a relatively low viscosity melted TPU adhesive (3000-6000cP), while a denser substrate needs to be coated with a higher viscosity melted TPU adhesive (15000-20000cP) on the shoe base material.

It is worth mentioning that the aforementioned porosity or void ratio is a measure of the void volume of the shoe upper material, and is the ratio of the volume with voids to the total volume of the material, which is a percentage between 0 and 100%. The size of the pores plays an important role, since the TPU adhesive has a harder time penetrating small pores than larger pores.

Specific embodiments of the present invention are described in detail as follows:

In the present invention, a correction solution 10 including a plasticizer 111 or an adjusting solvent 112 is added to a TPU adhesive 20 of a single viscosity to realize a method for managing the viscosity of the TPU adhesive. The correction solution 10 is a better solution, and in this embodiment, the single-viscosity TPU adhesive 20 has a higher viscosity.

According to the porosity or density of the material to be bonded, the viscosity of the single-viscosity TPU adhesive 20 is reduced by adding a correction solution 10 (including a plasticizer 111 or an adjustment solvent 112), thereby forming an adjusted TPU adhesive X , so that the adjusted TPU adhesive X can achieve good glue penetration and make the shoe material produce the best adhesion. In addition, since the adhesive strength is penetrated into the substrate by mechanical perfusion, it does not need any brushing or filling.

Because the amount of the correction solution 10 added to the single-viscosity TPU adhesive 20 is very small relative to the single-viscosity TPU adhesive 20, a carrier 13 becomes indispensable during the standard coating process. , the TPU adhesive 20 with a single viscosity of the correction solution 10 has poor wettability, so adding an adjusted surfactant 14 is the solution to this problem, and the adjustment solvent 112/the plasticizer is mixed according to the adjusted amount 111 . A crosslinking agent 12 and the carrier 13 to form the correction solution 10 . Preferably, the correction solution 10 may further include the surfactant 14 .

The present invention discloses that adding correction solutions 10 containing different concentrations of plasticizer 111 or adjusting solvent 112 to a single viscosity TPU adhesive 20 can produce adjusted TPU adhesive X with different viscosities, and these concentrations are based on Depends on the porosity properties of the shoe materials to be bonded.

According to the present invention, the single viscosity TPU adhesive 20 must be pre-defined and selected, and the single viscosity TPU adhesive 20 should be pre-selected to be the highest viscosity in the traditional bonding process and suitable for the densest (lowest porosity) shoe lining The TPU adhesive of the material, so according to the sole material of different porosity, the correction solution 10 containing different doses of plasticizer 111 or adjustment solvent 112 can be added to the TPU adhesive 20 of single viscosity to form the adjusted TPU adhesive. TPU Adhesive X, the adjusted TPU Adhesive X can interact with the sole material of specific porosity to achieve the best adhesive effect.

The aforementioned adjustment solvent 112 or plasticizer 111 can be designed with a series of different concentrations, so that the adjusted TPU adhesive X can be applied to various shoe backing materials, from the lowest porosity (low permeability) to the highest porosity (porous) shoe lining material.

The adjustment solvent 112 disclosed in the present invention is: cyclohexanone, dimethyl sulfoxide (DMOS), perchlorethylene and other suitable solvents, but not limited thereto.

The selected adjustment solvent 112 has the following constraints

1. The boiling point is higher than 100°C to prevent the solvent from evaporating before activation.

2. The boiling point is lower than 250°C, so that the solvent can evaporate within 48 hours.

3. It is an environmentally friendly solvent, non-hazardous and odorless.

In the present invention, the preferred adjusting solvent 112 is dimethyl sulfoxide (DMOS);

The correction solution 10 can consist of four main components, as shown in Figure 4:

(1) Adding plasticizer 111 or adjusting solvent 112 in an amount of 5-90%;

(2) The addition amount is 2～15% crosslinking agent 12;

(3) Surfactant 14 with an addition amount of 0.01 to 2%;

(4) Adding an appropriate amount of carrier 13, so that the sum of the four is 100%. The carrier 13 can be solvent or water.

Examples of porosity and correction solution 10 addition ratio are: porosity of mesh material is about 80-95%, porosity of pigskin is about 40%, porosity of synthetic PU leather is about 0-20%, In general, the ratio of a single viscosity TPU adhesive 20 (ie TPU powder) to the correction solution 10 is 1:0.2 to 1:3.5, and the ratio of 1:0.2 is suitable for materials with low porosity (such as , Synthetic leather 0-20% porosity), the ratio of 1:3.5 is suitable for high porosity materials (such as mesh materials), the optimal ratio of specific materials requires a series of powder tests, and then adjust and correct different ratios.

The following are examples of specific correction solutions 10, which are based on water or methyl ethyl ketone (carrier 13):

Formulation 1:

(1) The addition amount is 20% dimethyl sulfoxide (DMOS)

(2) The cross-linking agent R490 (Artecola company) whose addition amount is 10%

(3) The addition amount is 70% methyl ethyl ketone.

Formulation 2:

(1) The addition amount is 20% dimethyl sulfoxide (DMOS)

(2) The cross-linking agent R490 (Artecola company) whose addition amount is 10%

(3) The addition amount is 69.9% methyl ethyl ketone.

(4) A fluorosurfactant (Capstone FD-51) was added in an amount of 0.1%.

In addition, the single-viscosity TPU adhesive 20 can be TPU powder. The TPU powder can be selected from products produced by Lubrizol, BASF, and TPUCO; TPU powder produced by other companies can also be used. The selected TPU powder should meet the requirements of the shoe assembly process. Specifications and requirements, and the ability to change the viscosity by adding a correction solution to reduce the viscosity of TPU, the mechanical range from pure TPU to high plasticized TPU should cover the needs of all shoe materials, which can be achieved through the following for TPU The constraints to achieve:

(1) The types of TPU are: polyester, polyether, caprolactam, aliphatic and other copolymers.

(2) Hardness: more than 50A

(3) Melting point viscosity: less than 100g/10 minutes (ASTM D-1238-170C, 2.16kg)

(4) Glass transition temperature (Glass Transition Temperature, Tg): lower than -20°C

(5) Activation temperature: 40～80℃ (Kofler LA-17method)

Any method capable of applying the correction solution 10 to a single viscosity TPU adhesive 20 is suitable, such as: mixing with TPU powder prior to application to the substrate, spraying on a layer of TPU powder, brushing on TPU powder layer and other methods known in the art. The above methods can be performed manually or automatically.

Figure 2 shows the flow diagram of the assembly of the rubber sole (as the base material) and the upper (the target material) proposed by the present invention. In this assembly process, only the TPU powder 20 of a single viscosity is coated on the substrate, and then the correction solution 10 with a limited concentration is used for "mixing" treatment, and the adjusted TPU adhesive X has been obtained. The correction solution 10 mentioned above The concentration of the adjustment solvent 112 depends on the uppers to be bonded.

The footwear assembly steps of the present invention, as shown in Figure 2, include:

Sole cleaning step A, cleaning the surface of a sole so that the surface of the sole can be coated with TPU powder;

The step B1 of painting the sole is to apply the primer so that the surface of the sole can be coated with TPU powder;

Step B2 of coating viscous liquid on the sole, apply the relevant painting process to apply a viscous or conductive liquid layer;

Coating TPU powder step C on the sole, coating the TPU powder on the viscous or conductive liquid layer, the TPU powder can provide adhesion by the viscosity of the viscous liquid or the static electricity of the conductive liquid layer;

Adjust step D, apply the correction solution to the TPU powder;

Shoe upper cleaning step E, cleaning a shoe upper to be assembled;

Drying treatment step F, heating to dry the correction solution and activate the TPU powder; and

Assembling step G, press and bond the surface of the sole and the upper.

In another embodiment, the shoe-making assembly steps, as shown in Figure 3, include:

Sole cleaning step A, cleaning the surface of a sole so that the surface of the sole can be coated with TPU powder;

The step B1 of painting the sole is to apply the primer so that the surface of the sole can be coated with TPU powder;

Step B2 of coating viscous liquid on the sole, apply the relevant painting process to apply a viscous or conductive liquid layer;

Coating TPU powder step C on the sole, coating the TPU powder on the viscous or conductive liquid layer, the TPU powder can provide adhesion by the viscosity of the viscous liquid layer or the static electricity of the conductive liquid to form a powder layer;

Judging step H, judging the porosity of a shoe upper material, and then judging whether to execute the adjustment step D, if necessary, execute the adjustment step D, if not, execute the drying treatment step F;

Conditioning step D, applying correction solution 10 to the powder layer;

Drying treatment step F, heating to activate the TPU powder;

shoe upper cleaning step E, cleaning the shoe upper to be assembled; and

Assembling step G, connect and press the surface of the sole and the upper.

The following are examples of applying different concentrations of solvents according to shoe upper materials with different porosities, and are also specific examples of each step:

Example 1:

(a) Coating the viscous liquid on the sole Step B2: coating the sole (rubber) with the viscous liquid (dispersion of TPU in water);

(b) sole coating TPU powder step C: Utilize the machine (model is OPS 410) produced by Orisol Company to coat the powdery TPU with high molecular weight on the viscous liquid, each sole is coated with 3g respectively, ( It is worth mentioning that the aforementioned powdery TPU with high molecular weight can be Artepowder 7080 produced by Orisol);

(c) Drying treatment step F: the powdered TPU with high molecular weight on the sole is heated in an oven at 65°C/3 minutes and activated with a flash activator (up to 90°C on the surface);

(d) Assembly step G: Adhesive to the upper part made of mesh without any pretreatment, (e) Test step: Perform a peel test after 48 hours to confirm that it is the mesh of the upper and the sole Between low adhesion, the aforementioned adhesion is between 2-10N/cm.

Example 2:

(a) Coating the viscous liquid on the sole Step B2: coating the sole (rubber) with the viscous liquid (dispersion of TPU in water);

(b) sole coating TPU powder step C: Utilize the machine (model is OPS 410) produced by Orisol Company to coat the powdery TPU with high molecular weight on the viscous liquid, each sole is coated with 3g respectively, ( It is worth mentioning that the aforementioned powdery TPU with high molecular weight can be Artepowder 7080 produced by Orisol);

(c) Adjustment step D: coating the powdery TPU layer with high molecular weight with 3 g of correction solution 10, the aforementioned correction solution 10 being the above-mentioned formulation 1;

(d) Drying treatment step F: After the aforementioned spraying step, the powdered TPU with high molecular weight on the sole is heated in an oven at 65°C/3 minutes and activated with a flash activator (reaching 90°C on the surface );

(e) Assembly step G: Bonding without any pretreatment to upper parts made of mesh;

(f) Test procedure: Peel test was carried out after 48 hours. The average peel force was 62N/cm, and 30N/cm was used as the test standard for pass or fail.

Embodiment 3:

(a) Coating the viscous liquid on the sole Step B2: coating the sole with a viscous liquid (TPU dispersion in water), the material of the sole is rubber mixed with EVA (polyethylene vinyl acetate);

(b) sole coating TPU powder step C: Utilize the machine (model is OPS 410) produced by Orisol Company to coat the powdered TPU with high molecular weight on the viscous liquid, each sole is coated with 3g respectively, ( It is worth mentioning that the aforementioned powdery TPU with high molecular weight can be Artepowder 7080 produced by Orisol);

(c) Adjustment step D: coating the powdery TPU layer with high molecular weight with 3 g of correction solution 10, the aforementioned correction solution 10 being the above-mentioned formulation 1;

(d). Drying treatment step F: After the aforementioned spraying step, the powdered TPU with high molecular weight on the sole is heated in an oven at 65°C/3 minutes and activated with a flash activator (reaching 90% on the surface) ℃);

(e) Assembly step G: Adhesion without any pretreatment to the upper part made of artificial leather, which will have some areas separated from the upper immediately after assembly crimping.

Embodiment 4:

(a) Coating the viscous liquid on the sole Step B2: coating the sole with a viscous liquid (TPU dispersion in water), the material of the sole is rubber mixed with EVA (polyethylene vinyl acetate);

(b) sole coating TPU powder step C: Utilize the machine (model is OPS 410) produced by Orisol Company to coat the powdery TPU with high molecular weight on the viscous liquid, each sole is coated with 3g respectively, ( It is worth mentioning that the aforementioned powdery TPU with high molecular weight can be Artepowder 7080 produced by Orisol);

(c) Adjustment step D: coating the powdery TPU layer with high molecular weight with 1.5 g of correction solution 10, the aforementioned correction solution 10 being the above-mentioned formulation 1;

(d) Drying treatment step F: After the aforementioned spraying step, the powdered TPU with high molecular weight on the sole is heated in an oven at 65°C/3 minutes and dried with a flash activator (reaching 90% on the surface). ℃);

(e) Assembly step G: Bonding without any pretreatment to upper parts made of artificial leather, so that the final shoe body has no separation problems;

(f) Test procedure: After 48 hours, the peeling test was carried out. The average peeling force was 57N/cm, and 35N/cm was used as the test standard for passing or not.

Embodiment 5:

(a) Coating the viscous liquid on the sole Step B2: coating the sole with a viscous liquid (dispersion of TPU in water), the material of the sole is rubber;

(b) sole coating TPU powder step C: Utilize the machine (model is OPS 410) produced by Orisol Company to coat the powdery TPU with high molecular weight on the viscous liquid, each sole is coated with 3g respectively, ( It is worth mentioning that the aforementioned powdery TPU with high molecular weight can be Artepowder 7080 produced by Orisol);

(c) Adjustment step D: coating the powdery TPU layer with high molecular weight with 3 g of correction solution 10, the aforementioned correction solution 10 being the above-mentioned formulation 2;

(d) Drying treatment step F: After the aforementioned spraying step, the powdered TPU with high molecular weight on the sole is heated in an oven at 65°C/3 minutes and dried with a flash activator (reaching 90% on the surface). ℃);

(e) Assembly step G: Bonding without any pretreatment to upper parts made of mesh;

(f) Test procedure: After 48 hours, the peeling test was carried out. The average peeling force was 45N/cm, and 30N/cm was used as the test standard for passing or not.

In summary, the above-mentioned embodiments and accompanying drawings are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Any modifications made within the spirit and principles of the present invention, Equivalent replacements, improvements, etc., should all be included in the protection scope of the present invention.

Claims (14)

1. a kind of Improvement type shoemaking assembly method, which is characterized in that include the following steps：

Sole cleanup step cleans a sole surface, sole surface is enable to be coated TPU powder；

Sole squeegeeing step applies priming, sole surface is enable to be coated TPU powder；

Sole coats viscous liquid step, bestows related brushing technique and coats stickiness or conducting liquid layer；

Sole coats TPU powder steps, and by TPU powder coatings to stickiness or conducting liquid layer, TPU powder is by viscous liquid The stickiness of layer or the electrostatic of conduction liquid provide adhesive force, to form a powder bed；

One amendment solution is coated on the powder bed by set-up procedure；

Vamp cleaning step cleans a vamp to be assembled；

Drying and processing step, heating keep the amendment solution dry and TPU powder are allowed to activate；And

Assembling steps press gluing sole surface and vamp.

2. Improvement type shoemaking assembly method as described in claim 1, which is characterized in that the TPU powder and the amendment solution Ratio is between 1：0.2~1：3.5.

3. Improvement type shoemaking assembly method as described in claim 1, which is characterized in that the amendment solution includes plasticizer or tune Whole solvent.

4. Improvement type shoemaking assembly method as described in claim 1, which is characterized in that correct solution and coated in a manner of spraying On the powder bed.

5. Improvement type shoemaking assembly method as described in claim 1, which is characterized in that correct solution and be coated in a manner of brushing On the powder bed.

6. Improvement type shoemaking assembly method as described in claim 1, which is characterized in that TPU powder has following characteristics：

(1) type of TPU is：Polyester, polyethers, caprolactam, aliphatic series and other copolymers；

(2) hardness：More than 50A；

(3) fusing point viscosity：Less than 100g/10 minutes；

(4) glass transition temperature：Less than -20 DEG C；

(5) activation temperature：40~80 DEG C.

7. Improvement type shoemaking assembly method as claimed in claim 3, which is characterized in that the adjustment solvent includes following characteristic：

(1) boiling point is higher than 100 DEG C；

(2) boiling point is less than 250 DEG C；

(3) there is good polyurethane absorbability.

8. Improvement type shoemaking assembly method as described in claim 1, which is characterized in that the amendment solution is with water or methyl second Based on base ketone.

9. Improvement type shoemaking assembly method as described in claim 1 assemblies and sets up shoemaking process suitable for inventory.

10. a kind of Improvement type shoemaking assembly method, which is characterized in that include the following steps：

Sole cleanup step cleans a sole surface, sole surface is enable to be coated TPU powder；

Sole squeegeeing step applies priming, sole surface is enable to be coated TPU powder；

Sole coats viscous liquid step, bestows related brushing technique and coats stickiness or conducting liquid layer；

Sole coats TPU powder steps, and by TPU powder coatings to stickiness or conducting liquid layer, TPU powder can be by stickiness liquid The stickiness of body or the electrostatic of conduction liquid provide adhesive force, to form a powder bed；

Judgment step, judges the porosity of the material of a vamp, and then judges whether that execute set-up procedure executes this if needed Set-up procedure, as need not if execute the drying and processing step；

Set-up procedure will be corrected solution and is coated on powder bed；

Drying and processing step, heating make TPU powder activate；

Vamp cleaning step cleans the vamp to be assembled；And

Assembling steps, connection pressing sole surface and vamp.

11. a kind of amendment solution, which is characterized in that including：

The plasticizer or adjustment solvent that additive amount is 5~90%；

The crosslinking agent that additive amount is 2~15%；

Additive amount is suitable carrier, and it is 100% to make the summation of three.

12. a kind of amendment solution, which is characterized in that including：

The plasticizer or adjustment solvent that additive amount is 5~90%；

The crosslinking agent that additive amount is 2~15%；

The surfactant that additive amount is 0.01~2%；

Additive amount is suitable carrier, and the summation for making four is 100%.

13. the amendment solution as described in claim 11 or 12, which is characterized in that the carrier is solvent or water.

14. the amendment solution as described in claim 11 or 12, which is characterized in that the adjustment solvent is dimethyl sulfoxide (DMSO).