TW202003227A - TPU composite structure having high bonding strength and method for manufacturing the same - Google Patents

Abstract

The present invention provides a TPU composite structure having high bonding strength and method for manufacturing the same. The TPU composite includes a fabric, an adhesive layer and a TPU layer. The adhesive layer is disposed on a surface of the fabric, and a portion of the adhesive layer immerses into the fibers of the fabric. The adhesive layer is disposed between the fabric and the TPU layer and is formed by an adhesive composition. The adhesive composition includes a resin material, a catalyst, an organic isocyanate curing agent and an organic isocyanate adhesive. Based on the use of the resin material and the catalyst in the adhesive layer, the fabric and the TPU layer in the composite structure may achieve excellent bonding strength therebetween.

Description

Thermoplastic polyurethane composite structure with high bonding strength and manufacturing method thereof

The invention relates to a composite structure and a manufacturing method thereof, in particular to a thermoplastic polyurethane composite structure with high bonding strength and a manufacturing method thereof.

The physical properties of Thermoplastic Polyurethane (TPU) are between plastic materials and rubber materials. After continuous research and development, this material can be processed and processed by different processes according to product needs. Therefore, the properties of TPU, such as mechanical strength, wear resistance, cold resistance, and biocompatibility, have been greatly improved and improved with the scope of use and product needs. In addition, the application range of TPU materials also tends to diversify. For example, TPU materials have been put into use for people's livelihood, defense industry, and medical and health supplies.

In the prior art, the TPU material layer and the base fabric are generally combined with each other to meet the requirements for use. For example, the TPU material is usually attached to the base fabric by directly applying an adhesive. However, the use of cement alone cannot achieve the desired adhesion and bonding effects.

The technical problem to be solved by the present invention is to provide a thermoplastic polyurethane composite structure with high bonding strength and a manufacturing method in view of the deficiencies of the prior art. The manufacturing method provided by the present invention is to dip the base fabric with a pre-treatment solution before applying the adhesive, thereby enhancing the adhesive strength between the base fabric and the thermoplastic polyurethane layer formed later.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a thermoplastic polyurethane composite structure with high bonding strength, which has a base fabric, an adhesive layer and a thermoplastic polyurethane layer. The adhesive layer is disposed on a surface of the base fabric, and at least a portion of the adhesive layer penetrates into the fibers of the base fabric. The adhesive layer is provided between the base fabric and the thermoplastic polyurethane layer. The adhesive layer is formed by an adhesive composition including a resin material, a catalyst material, an organic isocyanate-based hardener and an organic isocyanate adhesive, and in the adhesive layer The catalyst material is bonded between the base fabric and the thermoplastic polyurethane layer.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength, which includes: immersing a base fabric with a pretreatment solution to remove The pretreatment solution is attached to a surface of the base fabric, wherein at least a portion of the pretreatment solution penetrates into the fibers of the base fabric, and the pretreatment solution includes a resin material, a catalyst material, and Water; drying the base fabric to activate the catalyst material; dipping the base fabric with a hardener solution to attach the hardener solution to the surface of the base fabric, wherein, At least a portion of the hardener solution penetrates into the fibers of the base fabric, and the hardener solution contains an organic isocyanate hardener and water; the base fabric is dried to crosslink the organic isocyanate hardener ; Pasting an adhesive solution on the surface of the base fabric to attach the adhesive solution on the surface of the base fabric, wherein at least a part of the adhesive solution penetrates into the Within the fibers of the base cloth, and the adhesive solution contains an adhesive; drying the base cloth to form an adhesive layer; and calendering a thermoplastic polyurethane compound on the surface of the adhesive layer by a calender To form a thermoplastic polyurethane layer, wherein the thermoplastic polyurethane layer is connected to the base fabric through the adhesive layer.

One of the beneficial effects of the present invention is that the thermoplastic polyurethane composite structure with high bonding strength provided by the present invention and its manufacturing method can be cured by "the next composition includes a resin material, a catalyst material, and an organic isocyanate system Agent and an organic isocyanate adhesive, and the catalyst material in the adhesive layer is bonded between the base fabric and the thermoplastic polyurethane layer" and "soak a base fabric with a pretreatment solution To attach the pre-treatment solution to a surface of the base fabric, wherein at least a portion of the pre-treatment solution penetrates into the fibers of the base fabric, and the pre-treatment solution includes a resin material, a "Catalyst material and water" technical solution to improve the bonding strength between the base fabric and the thermoplastic polyurethane layer in the composite structure.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and explanation only, and are not intended to limit the present invention.

S‧‧‧thermoplastic polyurethane composite structure

1‧‧‧Kib

2‧‧‧Next layer

21‧‧‧wetting layer

22‧‧‧Outer

3‧‧‧thermoplastic polyurethane layer

1 is a schematic cross-sectional view of a thermoplastic polyurethane composite structure with high bonding strength provided by an embodiment of the present invention; FIG. 2 is a flowchart of a method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength provided by an embodiment of the present invention.

The following are specific specific examples to illustrate the embodiments of the present invention related to "thermoplastic polyurethane composite structure with high bonding strength and its manufacturing method". Those skilled in the art can understand the advantages of the present invention from the content disclosed in this specification With effects. The present invention can be implemented or applied through other different specific embodiments. Various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual sizes, and are declared in advance. The following embodiments will further describe the related technical content of the present invention, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" as used herein may include any combination of any one or more of the associated listed items, depending on the actual situation.

The invention discloses a thermoplastic polyurethane composite structure with high bonding strength and a manufacturing method thereof. The structural features and materials of the composite structure are described below. Please refer to Figure 1. 1 is a schematic cross-sectional view of a thermoplastic polyurethane composite structure with high bonding strength provided by an embodiment of the present invention.

As shown in FIG. 1, the thermoplastic polyurethane composite structure S with high bonding strength disclosed in the present invention includes a base cloth 1, an adhesive layer 2 and a thermoplastic polyurethane layer 3. The base fabric 1 has two opposite surfaces, and then the layer 2 is provided on one surface of the base fabric 1. For example, the base fabric 1 has an upper surface and a lower surface, and then the layer 2 is disposed on the upper surface of the base fabric 1.

It is worth noting that, in the embodiment of the present invention, the subsequent layer 2 is not completely disposed on the surface of the base cloth 1, that is, the outside of the base cloth 1. In fact, since the base cloth 1 is formed of a fiber material, at least a part of the adhesive layer 2 will penetrate into the fibers of the base cloth, so that a part of the adhesive layer 2 is located between the upper surface and the lower surface of the base cloth 1. Specifically, the adhesive layer 2 may have a wetting layer 21 and an outer layer 22, the wetting layer 21 is disposed inside the base fabric 1 (infiltrated into the fibers of the base fabric 1), and the outer layer 22 is disposed outside the base fabric 1 (On the surface of the base cloth 1).

Next, please also refer to Figure 1. In the thermoplastic polyurethane composite structure S with high bonding strength provided by the embodiment of the present invention, the thermoplastic polyurethane layer 3 is disposed on the adhesive layer 2 on the base fabric 1, so that the adhesive layer 2 is disposed on the base fabric 1 and the thermoplastic polyurethane layer 3 between. In fact, in the embodiment of the present invention, the thermoplastic polyurethane layer 3 is adhered to the surface of the base fabric 1 through the adhesive layer 2. In addition, the thermoplastic polyurethane layer 3 may have a thickness between 0.01 and 2 mm.

As described above, the adhesive layer 2 includes a resin material, a catalyst material, an organic isocyanate-based hardener, and an organic isocyanate-based adhesive. In fact, the above material composition is not necessarily formed on the base fabric 1 in a single step to form the adhesive layer 2. The method of forming the adhesive layer 2 will be described in detail later in a description of a method for manufacturing a thermoplastic polyurethane composite structure having high bonding strength.

In the embodiment of the present invention, the resin material and the catalyst material in the adhesive layer 2 cooperate with each other, so that the catalyst material is bonded between the base fabric 1 and the thermoplastic polyurethane layer 3. In other words, the catalyst material can assist the organic isocyanate-based adhesive, so that the base fabric 1 and the thermoplastic polyurethane layer 3 have better bonding strength. The resin material may be a two-component PU synthetic resin, and the catalyst material may be a melamine catalyst. The use ratio of the resin material and the catalyst material will be described in detail in the description of the manufacturing method.

Next, see Figure 2. The invention also provides a method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength. As shown in FIG. 2, the manufacturing method provided by the present invention includes: dipping a base fabric with a pretreatment solution (step S100); drying the base fabric (S102); dipping the substrate with a hardener solution Cloth (step S104); drying the base cloth (S106); mounting an adhesive solution on the surface of the base cloth (step S108); drying the base cloth (S110); and passing a The calender calenders a thermoplastic polyurethane compound on the surface of the adhesive layer (S112). The details of each step will be described in detail below.

First, the manufacturing method involves dipping the base fabric with a previously treated solution. The base fabric is the base fabric 1 described above, and the type of the base fabric 1 may be nylon cloth or polyester fiber cloth. In a preferred embodiment of the present invention, the base cloth 1 is nylon cloth. In other words, in step S100, the base fabric 1 is pre-processed first. The previous processing steps can greatly increase the bonding strength between the adhesive used subsequently and the thermoplastic polyurethane layer formed by the thermoplastic polyurethane compound.

Specifically, step S100 may be completed by a paper laminator. The base cloth 1 can be transported on a laminating machine, and by rolling of a roller (for example, a pasting wheel), the pretreatment solution disposed in the container below the base cloth 1 can be brought to one surface of the base cloth 1. This method is called kiss. Compared with the pasting method, that is, coating the treatment agent on the base fabric 1 and using the immersion method, the content of the pretreatment solution provided on the surface of the base fabric 1 is less, and the penetration of the base through this step can be controlled The content of the pretreatment solution within the fibers of the cloth 1. In other words, the immersion method is to attach the pretreatment solution to one of the surfaces of the base fabric 1.

As mentioned above, in the embodiments of the present invention, the pretreatment solution may include a resin material, a catalyst material, and water. Water is a solvent used to dissolve and disperse resin materials and catalyst materials. As mentioned above, through the combination of the resin material and the catalyst material, the bonding strength between the adhesive and the thermoplastic polyurethane material can be strengthened.

The resin material may be a two-component PU synthetic resin, and the catalyst material may be a melamine catalyst. For example, the pretreatment solution includes between 3 to 5 parts by weight of the resin material, between 0.1 to 0.17 parts by weight of the catalyst material, and 100 parts by weight of water. In addition, the content ratio between the resin material and the catalyst material in the pretreatment solution may be about 30:1, for example, between 28:1 and 32:1. By controlling the ratio of the resin material to the catalyst material within the above range, a better effect of enhancing the bonding strength can be achieved.

In step S100, the base fabric 1 may be dipped with an amount of glue between 130 and 170 g/m². In addition, the pasting wheel of the laminating machine is 30 to 120 mesh. However, the amount of glue and the characteristics of the glue wheel can be adjusted according to demand.

After attaching the pretreatment solution to the surface of the base fabric 1 by means of a kiss and allowing at least a part of the pretreatment solution to penetrate into the fibers of the base fabric, step S102 is followed: drying the base fabric 1. Drying the base cloth 1 can remove the water in the pretreatment solution provided on its surface, and activate the catalyst material. In detail, in step S102, the base fabric 1 may be dried at a processing time between 10 to 30 seconds and a temperature between 160 to 200°C to remove water and activate the catalyst material.

Next, please also refer to Figure 2. In the completion step S102, resin material and catalyst material are distributed between the surface of the base fabric 1 and the internal fibers. Next, step S104 is performed to immerse the base fabric with the hardener solution so that the hardener solution adheres to the surface of the base fabric 1.

In detail, the hardener solution is attached to the surface on which the resin material and the catalyst material have been provided. Similarly, setting the hardener solution in a dipping manner can cause at least a portion of the hardener solution to penetrate into the fibers of the base fabric. The hardener solution contains an organic isocyanate hardener and water. For example, the hardener solution is a Hylene-based organic isocyanate hardener and water as a solvent. In a preferred embodiment of the present invention, the hardener solution contains between 3 and 5 parts by weight of an organic isocyanate hardener and 100 parts by weight of water.

As mentioned above, the dip method in step S104 is similar to that in S100. In step S104, a paste roller of 30 to 120 mesh is also used, and the step of dipping can be performed with a glue amount of 130 to 170 g/m ² . Similarly, the amount of glue and the characteristics of the glue wheel can be adjusted according to demand.

After the hardener solution is set on the surface of the base fabric 1, step S106 is performed to dry the base fabric to crosslink the organic isocyanate hardener. In fact, in step S106, the base fabric 1 may be dried at a processing time between 10 and 30 seconds and a temperature between 160 and 200°C to remove water and cross the organic isocyanate hardener. And make the organic isocyanate hardener and the resin material and catalyst material that have been provided on and inside the base fabric 1 evenly distributed on and inside the base fabric 1.

As shown in FIG. 2, after the second drying step (S106), step S108 may be performed to mount the adhesive solution on the surface of the base fabric 1. In fact, after the aforementioned two immersion steps (S100, S104), the adhesive solution is set on the surface of the base fabric 1 that has been treated by pasting. Similarly, the adhesive solution adheres to the surface of the base fabric 1, and at least a part of the adhesive solution penetrates into the fibers of the base fabric 1.

Specifically, the adhesive solution contains an adhesive, such as an organic isocyanate adhesive. In one embodiment of the present invention, the adhesive solution contains 100 parts by weight of an organic isocyanate-based adhesive and a bridging agent between 3 and 5 parts by weight. The adhesive layer 2 formed in step S108 can cooperate with the resin material and the catalyst material previously provided on the surface of the base fabric 1 to help the thermoplastic polyurethane layer 3 subsequently provided on the base fabric 1 to be well Laminated with the base fabric 1.

In step S108, the difference from the previous steps S100 and S102 is that although the above three steps can all be completed by a laminating machine, step S108 is carried out by laminating, while steps S100 and S102 are by leaching (kiss) Way. In step S108, it is possible to mount with a glue amount between 50 and 90 g/m ² .

After step S108 is completed, step S110 is performed to dry the base cloth 1 on which the adhesive solution is pasted to form the adhesive layer 2. In step S108, the components provided on and in the base cloth 1 in the previous step are heated and uniformly distributed in the subsequent layer 2.

In other words, in the manufacturing method provided by the present invention, before the thermoplastic polyurethane layer 3 is attached to the base fabric 1, it has undergone three processing steps, that is, pretreatment with resin material and catalyst material, to Treatment with hardener and treatment with adhesive. In this way, the adhesive layer 2 having the effect of improving the bonding strength between the base fabric 1 and the thermoplastic polyurethane layer 3 has been formed on the surface of the base fabric 1.

Finally, in step S112, the thermoplastic polyurethane compound is calendered on the surface of the adhesive layer 2 by a calender to form the thermoplastic polyurethane layer 3. In detail, in step S112, the thermoplastic polyurethane composition may be mixed and dispersed first, and then the thermoplastic polyurethane composition may be installed in a kneading device for kneading. The refining temperature can be between 90 and 130°C. The thermoplastic polyurethane composition may comprise 100 parts by weight of thermoplastic polyurethane, between 0.01 to 1 part by weight of stabilizer, and between 1 to 5 parts by weight of colorant.

For example, the thermoplastic polyurethane in the thermoplastic polyurethane composition may be thermoplastic polyurethane rubber particles, and the stabilizer may include a light stabilizer such as an ultraviolet light absorber. The color material can be used to give the desired color and appearance to the product.

After the thermoplastic polyurethane composition is refined, the refined compound is taken out from the kneading device and sent to a film production device (such as a calender) to form a continuous thermoplastic polyurethane film. In detail, the refined thermoplastic polyurethane composition can be pressed by an embossing wheel to control the thickness of the formed thermoplastic polyurethane film. For example, the thickness of the thermoplastic polyurethane film after forming the thermoplastic polyurethane layer 3 on the base fabric 1 may be between 0.1 and 2 mm.

In step S112, it may further include heating the thermoplastic polyurethane film provided on the base fabric 1, for example, at a temperature between 125 and 165°C, preferably between 130 and 160°C The base fabric 1 and the thermoplastic polyurethane film thereon are heated to form the thermoplastic polyurethane layer 3.

[Beneficial effect of embodiment]

One of the beneficial effects of the present invention is that the thermoplastic polyurethane composite structure with high bonding strength provided by the present invention and its manufacturing method can be cured by "the next composition includes a resin material, a catalyst material, and an organic isocyanate system Agent and an organic isocyanate adhesive, and the catalyst material in the adhesive layer is bonded between the base fabric and the thermoplastic polyurethane layer" and "soak a base fabric with a pretreatment solution To attach the pre-treatment solution to a surface of the base fabric, wherein at least a portion of the pre-treatment solution penetrates into the fibers of the base fabric, and the pre-treatment solution includes a resin material, a "Catalyst material and water" technical solution to improve the bonding strength between the base fabric and the thermoplastic polyurethane layer in the composite structure.

Furthermore, the thermoplastic polyurethane composite structure with high bonding strength provided by the present invention can have a bonding strength of about 20 to 30% compared to the products in the prior art that do not use catalyst materials and resin materials for pretreatment. (Then strength). Specifically, the thermoplastic polyurethane composite structure with high bonding strength provided by the present invention can have an adhesive strength of about 50 N/cm or more.

The content disclosed above is only a preferred and feasible embodiment of the present invention, and therefore does not limit the scope of the patent application of the present invention, so any equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. Within the scope of the patent.

S‧‧‧thermoplastic polyurethane composite structure

1‧‧‧Kib

2‧‧‧Next layer

21‧‧‧wetting layer

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3‧‧‧thermoplastic polyurethane layer

Claims (10)

A thermoplastic polyurethane composite structure with high bonding strength, comprising: a base cloth; an adhesive layer provided on a surface of the base cloth, at least a part of the adhesive layer penetrates into the fibers of the base cloth; A thermoplastic polyurethane layer, the adhesive layer is disposed between the base fabric and the thermoplastic polyurethane layer; wherein, the adhesive layer is formed by an adhesive composition, the adhesive composition includes a resin material, a A catalyst material, an organic isocyanate hardener and an organic isocyanate adhesive, and the catalyst material in the adhesive layer is bonded between the base fabric and the thermoplastic polyurethane layer. The thermoplastic polyurethane composite structure with high bonding strength according to claim 1, wherein the resin material is a two-component PU synthetic resin and the catalyst material is a melamine catalyst. The thermoplastic polyurethane composite structure with high bonding strength according to claim 1, wherein the thickness of the thermoplastic polyurethane layer is between 0.01 and 2 mm. A method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength, comprising: dipping a base fabric with a pretreatment solution to attach the pretreatment solution to a surface of the base fabric, wherein, the At least a part of the pre-treatment solution penetrates into the fibers of the base fabric, and the pre-treatment solution contains a resin material, a catalyst material and water; the base fabric is dried to activate the catalyst material; The hardener solution dipped the base fabric so that the hardener solution adhered to the surface of the base fabric, wherein at least a portion of the hardener solution penetrated into the fibers of the base fabric, and the The hardener solution contains an organic isocyanate hardener and water; drying the base fabric to crosslink the organic isocyanate hardener; and pasting an adhesive solution on the surface of the base fabric, to Attaching the adhesive solution to the surface of the base fabric, wherein at least a portion of the adhesive solution penetrates into the fibers of the base fabric, and the adhesive solution includes an adhesive; drying The base fabric to form an adhesive layer; and calendering a thermoplastic polyurethane compound on the surface of the adhesive layer by a calender to form a thermoplastic polyurethane layer, wherein the thermoplastic polyurethane layer passes the adhesive layer Layer to interconnect with the base fabric. The method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength according to claim 4, wherein the pre-treatment solution contains between 3 and 5 parts by weight of the resin material, and between 0.1 and 0.17 parts by weight Between the catalyst material and 100 parts by weight of water. The method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength according to claim 4, wherein the hardener solution contains between 3 and 5 parts by weight of the organic isocyanate hardener and 100 parts by weight of water . The method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength according to claim 4, wherein the adhesive solution contains 100 parts by weight of the adhesive and a bridge between 3 and 5 parts by weight Agent. The method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength according to claim 4, wherein the resin material is a two-component PU synthetic resin, and the catalyst material is a melamine catalyst. The method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength according to claim 4, wherein the thermoplastic polyurethane compound contains 100 parts by weight of thermoplastic polyurethane, a stabilizer between 0.01 and 1 part by weight, and One color material between 1 and 5 parts by weight. The method for manufacturing a thermoplastic polyurethane composite structure with high bonding strength according to claim 4, wherein the step of immersing the base fabric with the pre-treatment solution includes: between 130 and 170 g/sq. The amount of glue between the meters is to dip the base fabric; wherein, the step of drying the base fabric includes: drying the base fabric at a temperature between 160 and 200°C.

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