Thermoplastic polyurethane fiber composite material and its preparation method and application

Abstract

The invention provides a thermoplastic polyurethane fiber composite material. The composite material comprises a low-melting polyether polyurethane film layer and a high-melting point nonwoven fabric embedded in the low-melting polyether polyurethane film layer, wherein the high-melting point nonwoven fabric is a pure high-melting point polyether nonwoven fabric or a compound high-melting point polyether nonwoven fabric. The invention also provides a preparation method of the composite material. The method concretely comprises the following steps: providing the high-melting point nonwoven fabric; and immersing a molten low-melting point polyether polyurethane material mixed with a urethane rubber vulcanizing agent in the high-melting point nonwoven fabric under vacuum conditions, carrying out mold shaping to prepare the thermoplastic polyurethane fiber composite material. The preparation method has a simple process, and is suitable for automatic production. The invention also provides an application of the composite material. The thermoplastic polyurethane fiber composite material has close combination of all layers, and can be used as an aerogenerator blade protection film.

Description

technical field

[0001] The invention relates to the field of composite materials, in particular to a thermoplastic polyurethane fiber composite material and its preparation method and application. Background technique

[0002] Thermoplastic polymer materials are widely used in daily necessities, clothing, automobile decoration and other industries because of their corrosion resistance, small specific gravity, and easy processing. At present, the use of thermoplastic polymers to prepare fiber fabric composite materials is a new direction of development in this field. Among them, in the wind power industry, the leading edge of wind power blades has been subjected to long-term wind friction, as well as the impact of sand and rain. Abrasive parts. There are usually two ways to protect the surface of wind turbine blades: sticking a thermoplastic polymer protective film, or spraying or rolling protective paint. However, due to the generally high viscosity of thermoplastic polyme...

Examples

Embodiment 1

[0022] This embodiment provides a method for preparing a thermoplastic polyurethane fiber composite material, which specifically includes the following steps:

[0023] (1) At a temperature of 200°C, the Elastollan 1185A polyether polyurethane material is heated and melted by a screw extruder to form a melt, and the melt is extruded from the extruder and output to the melt injection die head, and then pass hot air into the cavity of the melt injection die head, so that the melt is ejected from the cavity of the melt injection die head under negative pressure to form melt blown fibers, and the The obtained melt-blown fiber is processed by hot rolling so that the Elastollan 1185A polyether polyurethane non-woven fabric with a thickness of 0.1mm is obtained, and then it is laid flat in the mold cavity and the mold cavity is vacuumized. ;

[0024] (2) Heat Vibrathane 602 polyether polyurethane material to 110°C, heat MOCA polyurethane wear-resistant rubber vulcanizing agent to 120...

Embodiment 2

[0029] This embodiment provides a method for preparing a thermoplastic polyurethane fiber composite material, the steps of which are roughly the same as those in Example 1, except that:

[0030] The step (1) also includes first mixing the Elastollan 1185A polyether polyurethane material with carbon nanotubes to obtain a premixed material, and then melt-blowing the premixed material into a non-woven fiber containing Carbon nanotube composite Elastollan 1185A polyether polyurethane nonwoven fabric.

[0031] The specific structure of the polypropylene continuous fiber composite material prepared by the preparation method of the thermoplastic polyurethane fiber composite material provided in this example includes a Vibrathane 602 polyether polyurethane film layer and a composite Elastollan embedded in the Vibrathane602 polyether polyurethane film layer. 1185A polyether polyurethane non-woven fabric, wherein carbon nanotubes are wrapped in the composite Elastollan 1185A polyether p...

Embodiment 3

[0035] This embodiment provides a method for preparing a thermoplastic polyurethane fiber composite material, the steps of which are roughly the same as those in Example 1, except that:

[0036]The step (1) also includes first mixing the Elastollan 1185A polyether polyurethane material with carbon nanotubes and carbon nanofibers to obtain a premixed material, and then melt blowing the premixed material into a nonwoven Composite Elastollan 1185A polyether polyurethane non-woven fabric containing carbon nanotubes and carbon nanofibers in the fabric fibers.

[0037] The specific structure of the polypropylene continuous fiber composite material prepared by the preparation method of the thermoplastic polyurethane fiber composite material provided in this example includes a Vibrathane 602 polyether polyurethane film layer and a composite Elastollan embedded in the Vibrathane602 polyether polyurethane film layer. 1185A polyether polyurethane nonwoven fabric, wherein carbon nanotubes...

technical field

[0001] The invention relates to the field of composite materials, in particular to a thermoplastic polyurethane fiber composite material and its preparation method and application. Background technique

[0002] Thermoplastic polymer materials are widely used in daily necessities, clothing, automobile decoration and other industries because of their corrosion resistance, small specific gravity, and easy processing. At present, the use of thermoplastic polymers to prepare fiber fabric composite materials is a new direction of development in this field. Among them, in the wind power industry, the leading edge of wind power blades has been subjected to long-term wind friction, as well as the impact of sand and rain. Abrasive parts. There are usually two ways to protect the surface of wind turbine blades: sticking a thermoplastic polymer protective film, or spraying or rolling protective paint. However, due to the generally high viscosity of thermoplastic polyme...

Examples

Embodiment 1

[0022] This embodiment provides a method for preparing a thermoplastic polyurethane fiber composite material, which specifically includes the following steps:

[0023] (1) At a temperature of 200°C, the Elastollan 1185A polyether polyurethane material is heated and melted by a screw extruder to form a melt, and the melt is extruded from the extruder and output to the melt injection die head, and then pass hot air into the cavity of the melt injection die head, so that the melt is ejected from the cavity of the melt injection die head under negative pressure to form melt blown fibers, and the The obtained melt-blown fiber is processed by hot rolling so that the Elastollan 1185A polyether polyurethane non-woven fabric with a thickness of 0.1mm is obtained, and then it is laid flat in the mold cavity and the mold cavity is vacuumized. ;

[0024] (2) Heat Vibrathane 602 polyether polyurethane material to 110°C, heat MOCA polyurethane wear-resistant rubber vulcanizing agent to 120...

Embodiment 2

[0029] This embodiment provides a method for preparing a thermoplastic polyurethane fiber composite material, the steps of which are roughly the same as those in Example 1, except that:

[0030] The step (1) also includes first mixing the Elastollan 1185A polyether polyurethane material with carbon nanotubes to obtain a premixed material, and then melt-blowing the premixed material into a non-woven fiber containing Carbon nanotube composite Elastollan 1185A polyether polyurethane nonwoven fabric.

[0031] The specific structure of the polypropylene continuous fiber composite material prepared by the preparation method of the thermoplastic polyurethane fiber composite material provided in this example includes a Vibrathane 602 polyether polyurethane film layer and a composite Elastollan embedded in the Vibrathane602 polyether polyurethane film layer. 1185A polyether polyurethane non-woven fabric, wherein carbon nanotubes are wrapped in the composite Elastollan 1185A polyether p...

Embodiment 3

[0035] This embodiment provides a method for preparing a thermoplastic polyurethane fiber composite material, the steps of which are roughly the same as those in Example 1, except that:

[0036]The step (1) also includes first mixing the Elastollan 1185A polyether polyurethane material with carbon nanotubes and carbon nanofibers to obtain a premixed material, and then melt blowing the premixed material into a nonwoven Composite Elastollan 1185A polyether polyurethane non-woven fabric containing carbon nanotubes and carbon nanofibers in the fabric fibers.

[0037] The specific structure of the polypropylene continuous fiber composite material prepared by the preparation method of the thermoplastic polyurethane fiber composite material provided in this example includes a Vibrathane 602 polyether polyurethane film layer and a composite Elastollan embedded in the Vibrathane602 polyether polyurethane film layer. 1185A polyether polyurethane nonwoven fabric, wherein carbon nanotubes...