阅读说明：本技术 一种基布和合成革及其制备方法和应用 (Base cloth and synthetic leather, and preparation method and application thereof ) 是由 张旭 刘洲 胡玉洁 李彬 熊芬 于 2021-09-09 设计创作，主要内容包括：本发明特别涉及一种基布和合成革及其制备方法和应用,属于合成革技术领域,基布包括纤维,所述纤维包括纤维本体和铁磁性填料,所述铁磁性填料通过偶联剂附着于所述纤维本体,通过将铁磁性填料附着于纤维本体,在交变电磁场的作用下通过电磁感应的方式被直接加热,与传统的电阻丝发热装置不同,该方案的超细纤维无纺布基布就是面状发热源,无需在背面包覆电阻丝加热棉,有效的解决传统加热方式热量不均匀的问题。(The invention particularly relates to a base cloth and synthetic leather as well as a preparation method and application thereof, and belongs to the technical field of synthetic leather.)

1. A base fabric comprising fibers, said fibers comprising a fiber body and a ferromagnetic filler, said ferromagnetic filler being attached to said fiber body by a coupling agent.

2. The base fabric of claim 1, wherein the ferromagnetic filler comprises at least one of a nano-metal powder, a nano-metal alloy powder, and a nano-metal oxide powder; the particle size of the ferromagnetic filler is 50nm-1000 nm.

3. The substrate of claim 1, wherein the coupling agent comprises at least one of a silane coupling agent and a titanate coupling agent.

4. A method for preparing a base fabric, comprising:

mixing the ferromagnetic filler and the coupling agent, and then standing and precipitating to obtain a precipitate;

mixing the fiber body, the polyethylene resin and the precipitate, and then performing melt extrusion and spinning to obtain the sea-island fiber;

cutting and mixing the sea-island fibers, and then needling to obtain a non-woven fabric;

and carrying out polyurethane dipping, curing, cleaning, decrement fiber opening and sizing on the non-woven fabric to obtain the base fabric.

5. The method for producing the base fabric according to claim 4, wherein the ferromagnetic filler and the coupling agent are mixed in a ratio of 100: 1-3.

6. The method for producing the base fabric according to claim 4, wherein a mixing ratio of the fiber body, the polyethylene resin, and the precipitate is, by mass: 100: 80-100: 1-10.

7. The method for preparing the base fabric according to claim 4, wherein the polyurethane is impregnated for 48 to 72 hours.

8. The synthetic leather is characterized by comprising base cloth and a polyurethane leather layer attached to the base cloth, wherein the base cloth comprises fibers, the fibers comprise a fiber body and ferromagnetic filler, and the ferromagnetic filler is attached to the fiber body through a coupling agent.

9. A method for preparing synthetic leather, which is characterized by comprising the following steps:

mixing the ferromagnetic filler and the coupling agent, and then standing and precipitating to obtain a precipitate;

mixing the fiber body, the polyethylene resin and the precipitate, and then performing melt extrusion and spinning to obtain the sea-island fiber;

cutting and mixing the sea-island fibers, and then needling to obtain a non-woven fabric;

carrying out polyurethane dipping, curing, cleaning, decrement fiber opening and sizing on the non-woven fabric to obtain base fabric;

and (3) attaching a polyurethane skin layer to the base cloth to obtain the synthetic leather.

10. Use of synthetic leather, comprising applying the synthetic leather to a coated heating system; the synthetic leather comprises base cloth and a polyurethane leather layer attached to the base cloth, wherein the base cloth comprises fibers, the fibers comprise a fiber body and ferromagnetic fillers, and the ferromagnetic fillers are attached to the fiber body through coupling agents; the heating system comprises an electromagnetic induction heating device.

Technical Field

The invention belongs to the technical field of synthetic leather, and particularly relates to base cloth, synthetic leather, and preparation methods and applications thereof.

Background

The polyurethane superfine fiber synthetic leather is a kind of artificial leather formed by bonding superfine fiber base cloth and polyurethane leather layer, which is also called superfine fiber leather. The microfiber leather is close to genuine leather in visual and tactile perception, has excellent wear resistance, and is widely applied to coating of automobile interior parts such as steering wheels, door protection plates, seats and the like in cooperation with processability and cost advantages. With the increasing demand of consumers, the functions of interior parts of automobiles are more and more abundant, and the interior parts include heatable interior parts, such as seats and steering wheels with heating functions, so as to alleviate the problem that the temperature in the interior of an automobile is low in cold weather, and passengers feel uncomfortable when contacting the seats and the steering wheels.

Due to the limited processability of the leather, in order to realize a heatable interior trim part, the current solutions are mainly implemented by additional heating devices, such as heating cotton containing resistance wires, which are coated on the outer layer and used to supply power to the heating system, so that the generated heat is conducted to the surface of the part. According to part of schemes, the microfiber leather with improved heat conductivity is adopted, and high-heat-conductivity material nano powder such as silicon carbide, zinc oxide and aluminum oxide is added into the polyurethane leather layer, so that the heat conductivity coefficient of the coated microfiber leather is increased, and the heating efficiency is improved. However, in these schemes, the heating cotton needs to be wrapped on the foamed steering wheel frame or seat frame, and then wrapped, which results in many and complicated process steps, and because the resistance wire is a linear heat source, the heating cotton has a certain thickness, which results in uneven heat of the heated area, and the wrapped area has a raised appearance, and has a difference in hand feeling from the non-wrapped area, which affects the perception quality of the parts.

Disclosure of Invention

The application aims to provide base cloth, synthetic leather, a preparation method and application thereof, and aims to solve the problem of uneven heating at present.

The embodiment of the invention provides base cloth which comprises fibers, wherein the fibers comprise fiber bodies and ferromagnetic fillers, and the ferromagnetic fillers are attached to the fiber bodies through coupling agents.

Optionally, the ferromagnetic filler comprises at least one of a nano metal powder, a nano metal alloy powder and a nano metal oxide powder; the particle size of the ferromagnetic filler is 50nm-1000 nm.

Optionally, the coupling agent comprises at least one of a silane coupling agent and a titanate coupling agent.

Based on the same inventive concept, the embodiment of the invention also provides a preparation method of the base fabric, which comprises the following steps:

mixing the ferromagnetic filler and the coupling agent, and then standing and precipitating to obtain a precipitate;

mixing the fiber body, the polyethylene resin and the precipitate, and then performing melt extrusion and spinning to obtain the sea-island fiber;

cutting and mixing the sea-island fibers, and then needling to obtain a non-woven fabric;

and carrying out polyurethane dipping, curing, cleaning, decrement fiber opening and sizing on the non-woven fabric to obtain the base fabric.

Optionally, the mixing ratio of the ferromagnetic filler to the coupling agent is 100: 1-3.

Optionally, the mixing ratio of the fiber body, the polyethylene resin and the precipitate is, by mass: 100: 80-100: 1-10.

Optionally, the dipping time of the polyurethane dipping is 48h-72 h.

Based on the same inventive concept, the embodiment of the invention also provides synthetic leather, which comprises base cloth and a polyurethane leather layer attached to the base cloth, wherein the base cloth comprises fibers, the fibers comprise a fiber body and ferromagnetic fillers, and the ferromagnetic fillers are attached to the fiber body through a coupling agent.

Based on the same inventive concept, the embodiment of the invention also provides a preparation method of the synthetic leather, which comprises the following steps:

mixing the ferromagnetic filler and the coupling agent, and then standing and precipitating to obtain a precipitate;

mixing the fiber body, the polyethylene resin and the precipitate, and then performing melt extrusion and spinning to obtain the sea-island fiber;

cutting and mixing the sea-island fibers, and then needling to obtain a non-woven fabric;

carrying out polyurethane dipping, curing, cleaning, decrement fiber opening and sizing on the non-woven fabric to obtain base fabric;

and (3) attaching a polyurethane skin layer to the base cloth to obtain the synthetic leather.

Based on the same inventive concept, the embodiment of the invention also provides an application of the synthetic leather, which comprises the steps of applying the synthetic leather to a cladding heating system; the synthetic leather comprises base cloth and a polyurethane leather layer attached to the base cloth, wherein the base cloth comprises fibers, the fibers comprise a fiber body and ferromagnetic fillers, and the ferromagnetic fillers are attached to the fiber body through coupling agents; the heating system comprises an electromagnetic induction heating device.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

the base cloth provided by the embodiment of the invention comprises fibers, wherein the fibers comprise a fiber body and a ferromagnetic filler, the ferromagnetic filler is attached to the fiber body through a coupling agent, the ferromagnetic filler is attached to the fiber body, and the base cloth is directly heated in an electromagnetic induction mode under the action of an alternating electromagnetic field.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a flow chart of a method provided by an embodiment of the present invention;

fig. 2 is a block diagram of a process provided by an embodiment of the invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.

Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

the applicant finds in the course of the invention that: the processability of the leather is limited, and in order to realize a heatable interior part, the current solution is mainly accomplished by an additional heating device, such as a heating cotton containing a resistance wire, which is coated on the outer layer, and when in use, the heating system is powered to conduct the generated heat to the surface of the part. According to part of schemes, the microfiber leather with improved heat conductivity is adopted, and high-heat-conductivity material nano powder such as silicon carbide, zinc oxide and aluminum oxide is added into the polyurethane leather layer, so that the heat conductivity coefficient of the coated microfiber leather is increased, and the heating efficiency is improved. However, in these schemes, the heating cotton needs to be wrapped on the foamed steering wheel frame or seat frame, and then wrapped, which results in many and complicated process steps, and because the resistance wire is a linear heat source, the heating cotton has a certain thickness, which results in uneven heat of the heated area, and the wrapped area has a raised appearance, and has a difference in hand feeling from the non-wrapped area, which affects the perception quality of the parts.

In the prior art, there is a scheme of heating by additionally adding heating devices such as resistance wires, for example, chinese utility model patent application CN201921362630.8, a heating device for a steering wheel of an automobile and a steering wheel, wherein a heating wire is arranged at a part to be heated, the upper part of the heating wire is coated with leather, the heating wire is connected with a power supply by a wire, and the heating wire generates heat by being electrified to realize the heating effect, and the technical scheme has the steps of heating wire arrangement, wire installation and the like besides the power supply installation, and the process is complex; the heating wire is a linear heat source, so that the heating on the surface of the leather is uneven; the uneven heating can be relieved by wrapping a layer of heating cotton outside the heating wire, but the heating cotton has certain thickness, when the heating cotton is used on parts such as the rim of a steering wheel and the like, the heating cotton is raised in appearance after being wrapped, the heating cotton is different from the heating cotton in hand feeling, and passengers have poor perception on the heating cotton; for example, in chinese patent application CN201910974616.1, a method for preparing superfine fiber synthetic leather with electric heating function includes immersing superfine fiber synthetic leather in pyrrole monomer, and polymerizing in superfine fiber synthetic leather with oxidant to form polypyrrole continuous conductive network, so as to realize heating effect by electrifying.

In the traditional heating scheme of heating cotton containing resistance wires, the heating cotton is required to be wrapped on a foamed steering wheel framework and then wrapped, so that the process steps are multiple and complicated, and the resistance wires are linear heat sources, so that the heating cotton has certain thickness, the heat of a heated area is uneven, the heated area bulges in appearance after being wrapped, the problem of difference between the hand feeling and the non-wrapped area is solved, and the sensing quality of parts is influenced.

In order to solve the above problems, the present embodiment provides a base fabric and synthetic leather, and a preparation method and application thereof.

According to an exemplary embodiment of the present invention, a base fabric is provided, the base fabric including fibers, the fibers including a fiber body and a ferromagnetic filler, the ferromagnetic filler being attached to the fiber body by a coupling agent.

In this example, the fiber body was a polyamide-6 fiber.

As an alternative embodiment, the ferromagnetic filler includes at least one of a nano metal powder, a nano metal alloy powder, and a nano metal oxide powder; the particle size of the ferromagnetic filler is 50nm-1000 nm.

Specifically, the nano metal powder may be selected from nano iron, nano cobalt, nano nickel, etc., the nano metal alloy powder may be selected from nano iron-nickel alloy, etc., and the nano metal oxide powder may be selected from nano ferroferric oxide, etc.; it should be noted that the above list of nano metal powder, nano metal alloy powder and nano metal oxide powder is only used to illustrate that the present invention can be implemented, and is not meant to limit the present invention.

The particle size of the ferromagnetic filler is controlled to be 50nm-1000nm so as to control the dispersion and stability of the filler, the adverse effect of overlarge particle size is weak powder dispersibility, and the adverse effect of undersize particle size is high powder reaction activity and easy agglomeration. Both of these conditions affect the subsequent formation of a network of powder on the fibers.

As an alternative embodiment, the coupling agent includes at least one of a silane coupling agent and a titanate coupling agent.

Specifically, the silane coupling agent may be at least one selected from the group consisting of KH-550, KH-560, KH-570, KH-792, and the like, and the titanate coupling agent may be at least one selected from the group consisting of GR-102, GR-201, and the like. Wherein, the chemical name of KH-550 is gamma-aminopropyltriethoxysilane, the chemical name of KH-560 is gamma-glycidoxypropyltrimethoxysilane, the chemical name of KH-570 is gamma-methacryloyloxypropyltrimethoxysilane, the chemical name of KH-792 is N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, the chemical name of GR-102 is isopropyltris (dioctylpyrophosphate) titanate, and the chemical name of GR-201 is isopropyltris (dioctylpyrophosphate) titanate.

According to another exemplary embodiment of the present invention, there is provided a method of manufacturing a base fabric, the method including:

s1, mixing a ferromagnetic filler and a coupling agent, and standing and precipitating to obtain a precipitate;

as an alternative embodiment, the ferromagnetic filler and the coupling agent are mixed in a ratio of 100: 1-3.

Comprehensively considering the dispersion of the filler and the performance of the finished product, controlling the mixing ratio of the ferromagnetic filler to the coupling agent to be 100: 1-3, the adverse effect of overlarge value of the proportion is that the ferromagnetic filler is not easy to disperse and easy to agglomerate and precipitate, and the adverse effect of undersize is that the content of the coupling agent is increased, so that the dispersibility of the ferromagnetic filler is not improved, and the mechanical property, the aging resistance and other properties of a finished product are weakened.

In actual operation, the requirements of production processing feasibility, filler dispersion and surface treatment are met due to the influence of the type of the coupling agent and the type and the particle size of the filler.

S2, mixing the fiber body, the polyethylene resin and the precipitate, and then performing melt extrusion and spinning to obtain the sea-island fiber;

as an alternative embodiment, the mixing ratio of the fiber body, the polyethylene resin and the precipitate is, by mass: 100: 80-100: 1-10.

Considering the spinning feasibility and controlling the generation of a reticular structure, the mixing ratio of the fiber body, the polyethylene resin and the precipitate is controlled as follows: 100: 80-100: 1-10, the condition that the spinning process is influenced by the overlarge adverse effect of the ratio, the fiber diameter is uneven, the filler is unevenly distributed, and even the spinning cannot be carried out is caused, and the condition that the net structure is uneven or the net structure is not generated, so that the heating performance is influenced by the undersize adverse effect.

S3, cutting and mixing the sea-island fibers, and then needling to obtain non-woven fabrics;

and S4, carrying out polyurethane dipping, curing, cleaning, decrement fiber opening and sizing on the non-woven fabric to obtain the base fabric.

Specifically, after the non-woven fabric is obtained, standing for a period of time, then carrying out polyurethane impregnation, polyurethane curing, clean water cleaning, fiber reduction and opening, drying and sizing and the like, thus obtaining the superfine fiber non-woven fabric base fabric.

As an alternative embodiment, the polyurethane impregnation time is from 48h to 72 h.

By adopting the design, the sea-island fiber is kept stand for 48-72 hours before polyurethane impregnation, so that unreacted active groups in the coupling agent fully participate in condensation reaction, the ferromagnetic filler is coated on the surface of the polyamide-6 fiber, and the corrosion of oxygen and water in the air to the ferromagnetic filler is avoided while a high-molecular reticular structure is formed, so that the stable material performance is improved and maintained.

According to another exemplary embodiment of the present invention, there is provided synthetic leather, including a base fabric and a polyurethane skin layer attached to the base fabric, where the base fabric includes a fiber, the fiber includes a fiber body and a ferromagnetic filler, and the ferromagnetic filler is attached to the fiber body through a coupling agent.

According to another exemplary embodiment of the present invention, there is provided a method of preparing synthetic leather, the method including:

s1, mixing a ferromagnetic filler and a coupling agent, and standing and precipitating to obtain a precipitate;

s2, mixing the fiber body, the polyethylene resin and the precipitate, and then performing melt extrusion and spinning to obtain the sea-island fiber;

s3, cutting and mixing the sea-island fibers, and then needling to obtain non-woven fabrics;

s4, carrying out polyurethane dipping, curing, cleaning, decrement fiber opening and sizing on the non-woven fabric to obtain base fabric;

and S5, attaching a polyurethane skin layer to the base cloth to obtain the synthetic leather.

Specifically, a polyurethane skin layer is attached to the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

According to another exemplary embodiment of the present invention, there is provided a use of synthetic leather, the use comprising applying the synthetic leather to a coated heating system; the synthetic leather comprises base cloth and a polyurethane leather layer attached to the base cloth, wherein the base cloth comprises fibers, the fibers comprise a fiber body and ferromagnetic fillers, and the ferromagnetic fillers are attached to the fiber body through coupling agents; the heating system comprises an electromagnetic induction heating device.

Specifically, the heating system may be a steering wheel heating system, a seat heating system, or the like.

The filler in the polyurethane superfine fiber synthetic leather has ferromagnetism and high magnetic permeability, so the polyurethane superfine fiber synthetic leather can be directly heated in an electromagnetic induction mode under the action of an alternating electromagnetic field. Different from the traditional resistance wire heating device, the superfine fiber non-woven fabric base cloth of the scheme is a planar heating source, the resistance wire heating cotton does not need to be coated on the back surface, and the problems of uneven heat, low heating efficiency, poor sensing quality such as appearance and hand feeling and complex process of the traditional heating mode can be solved simultaneously.

As an alternative embodiment, the electromagnetic wave frequency of the electromagnetic induction heating device is 20-30kHz, and the power is 10-50W.

When cladding electromagnetic induction heating device, because the ferromagnetism filler in the superfine fiber non-woven fabrics base cloth layer forms network structure, can effectively restrict inside energy and reveal, cooperate the electromagnetic wave of lower frequency and the heating device of lower power, can realize quick high-efficient heating when guaranteeing passenger's safety.

The base fabric and the synthetic leather of the present application, and the preparation method and application thereof will be described in detail below with reference to examples, comparative examples, and experimental data.

The raw materials used in the following examples and comparative examples are as follows:

polyamide-6 resin-trade name YH900, supplier Yueyang Ba Ling petrochemical chemical fiber Co.

Low density polyethylene resin, brand No. 1I60A, was supplied by petrochemical company, Yanshan, Beijing.

Coupling agents-KH-550, KH-560, KH-570, KH-792, available from United states Union carbide; GR-102, GR-201, the supplier being Kengunya petrochemistry, USA.

Ferromagnetic fillers-nanometer iron powder (average particle size 300nm and 500nm), nanometer cobalt powder (average particle size 500nm), nanometer nickel powder (average particle size 200nm), nanometer iron-nickel alloy (FeNi50, average particle size 200nm and 300nm), and nanometer ferroferric oxide (average particle size 300 nm).

Diamagnetic filler-nanometer copper powder (average grain diameter 200 nm).

Paramagnetic filler-nano aluminum powder (average particle size 200 nm).

Polyurethane resins-JF-S-8030 (an aromatic polyurethane which is publicly sold by Zhejiang Huafeng synthetic resins Co., Ltd.), JF-S-AH7040 (an alicyclic polyurethane which is publicly sold by Zhejiang Huafeng synthetic resins Co., Ltd.), JF-S-AH7090 (an aliphatic polyurethane which is publicly sold by Zhejiang Huafeng synthetic resins Co., Ltd.) JF-A-WV2010 (an adhesive layer polyurethane resin which is publicly sold by Zhejiang Huafeng synthetic resins Co., Ltd.).

Examples and comparative examples using the same polyamide-6 resin, low density polyethylene resin and polyurethane grades, the total thickness of the prepared superfine fiber synthetic leather was 1.2mm, wherein the nonwoven fabric had a base layer of 1.0mm and a skin layer of 0.2 mm.

Example 1

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing nano iron powder filler with the surface treated by a coupling agent, namely preparing the coupling agent GR-102 into a solution, fully mixing the solution with the nano iron powder filler with the average particle size of 300nm, standing, filtering out precipitates, and drying by using drying equipment.

100 portions of nano iron powder filler

Coupling agent 2 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano iron powder filler with the surface treated by coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

2 parts of nano iron powder filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 48 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 2

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing nano nickel powder filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-570 into a solution, fully mixing the solution with the nano nickel powder filler with the average particle size of 200nm, standing, filtering out precipitate, and drying by using drying equipment.

100 portions of nano nickel powder filler

1 part of coupling agent

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano nickel powder filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

100 portions of low-density polyethylene resin

5 parts of nano nickel powder filler with the surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 3

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing nano iron-nickel alloy filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-550 into a solution, fully mixing the solution with the nano iron-nickel alloy filler with the average particle size of 200nm, standing, filtering out precipitate, and drying by using drying equipment.

100 portions of nano iron-nickel alloy filler

Coupling agent 2 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano iron-nickel alloy filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

5 parts of nano iron-nickel alloy filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 4

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing nano cobalt powder filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-550 into a solution, fully mixing the solution with the nano cobalt powder filler with the average particle size of 500nm, standing, filtering out precipitate, and drying by using drying equipment.

100 portions of nano cobalt powder filler

Coupling agent 2 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano cobalt powder filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

2 parts of nano cobalt powder filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 5

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing a nano ferroferric oxide filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-560 into a solution, fully mixing the solution with the nano ferroferric oxide filler with the average particle size of 300nm, standing, filtering out a precipitate, and drying by using drying equipment.

100 portions of nano ferroferric oxide filler

Coupling agent 3 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano ferroferric oxide filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

100 portions of low-density polyethylene resin

10 parts of nano ferroferric oxide filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 48 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 6

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing nano iron powder filler with the surface treated by a coupling agent, namely preparing the coupling agent GR-201 into a solution, fully mixing the solution with the nano iron powder filler with the average particle size of 500nm, standing, filtering out precipitates, and drying by using drying equipment.

100 portions of nano iron powder filler

1 part of coupling agent

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano iron powder filler with the surface treated by coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

100 portions of low-density polyethylene resin

1 part of nano iron powder filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 48 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 7

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing nano iron-nickel alloy filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-792 into a solution, fully mixing the solution with the nano iron-nickel alloy filler with the average particle size of 300nm, standing, filtering out precipitate, and drying by using drying equipment.

100 portions of nano iron-nickel alloy filler

Coupling agent 3 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano iron-nickel alloy filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

5 parts of nano iron-nickel alloy filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Example 8

A preparation method of polyurethane superfine fiber synthetic leather capable of being electromagnetically heated comprises the following preparation steps:

(1) preparing a nano iron-nickel alloy filler with the surface treated by a coupling agent, namely preparing the coupling agent GR-102 into a solution, fully mixing the solution with the nano iron-nickel alloy filler with the average particle size of 200nm, standing, filtering out a precipitate, and drying by using drying equipment.

100 portions of nano iron-nickel alloy filler

Coupling agent 2 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano iron-nickel alloy filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

100 portions of low-density polyethylene resin

1 part of nano iron-nickel alloy filler with surface treated by coupling agent

(3) Preparing electromagnetic heating polyurethane superfine fiber synthetic leather, cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 48 hours, then carrying out polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base cloth. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather capable of being electromagnetically heated.

Comparative example 1

A preparation method of polyurethane superfine fiber synthetic leather comprises the following steps:

(1) preparing nano copper powder filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-550 into a solution, fully mixing the solution with the nano copper powder filler with the average particle size of 200nm, standing, filtering out precipitate, and drying by using drying equipment.

100 portions of nano copper powder filler

Coupling agent 2 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano copper powder filler with the surface treated by coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

5 parts of nano copper powder filler with surface treated by coupling agent

(3) Preparing polyurethane superfine fiber synthetic leather, namely cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then performing polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base fabric. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather.

Comparative example 2

A preparation method of polyurethane superfine fiber synthetic leather comprises the following steps:

(1) preparing nano aluminum powder filler with the surface treated by a coupling agent, namely preparing the coupling agent KH-550 into a solution, fully mixing the solution with the nano aluminum powder filler with the average particle size of 200nm, standing, filtering out precipitate, and drying by using drying equipment.

100 portions of nano aluminum powder filler

Coupling agent 2 parts

(2) Preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano aluminum powder filler with the surface treated by a coupling agent, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

5 parts of nano aluminum powder filler with surface treated by coupling agent

(3) Preparing polyurethane superfine fiber synthetic leather, namely cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then performing polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base fabric. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather.

Comparative example 3

A preparation method of polyurethane superfine fiber synthetic leather comprises the following steps:

(1) preparing sea-island fiber, namely mixing polyamide-6 resin, low-density polyethylene resin and nano iron-nickel alloy filler with the average particle size of 200nm, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

5 parts of nano iron-nickel alloy filler

(2) Preparing polyurethane superfine fiber synthetic leather, namely cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, standing for 72 hours, then performing polyurethane impregnation, polyurethane curing, cleaning with clear water, reducing and splitting, drying and sizing and the like to obtain the superfine fiber non-woven fabric base fabric. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather.

Comparative example 4

A preparation method of polyurethane superfine fiber synthetic leather comprises the following steps:

(1) preparing sea-island fiber, namely mixing polyamide-6 resin and low-density polyethylene resin, and performing melt extrusion and spinning to prepare the sea-island fiber. The sea-island fiber comprises the following components in parts by mass

Polyamide-6 resin 100 parts

80 parts of low-density polyethylene resin

(2) Preparing polyurethane superfine fiber synthetic leather, namely cutting and mixing the sea-island fibers, needling the sea-island fibers into non-woven fabric, and obtaining the superfine fiber non-woven fabric base fabric through the steps of polyurethane impregnation, polyurethane curing, clean water cleaning, decrement fiber opening, drying and sizing and the like. And (3) attaching a polyurethane skin layer on the obtained superfine fiber non-woven fabric base cloth to prepare the polyurethane superfine fiber synthetic leather.

Examples of the experiments

The samples of examples 1 to 8 and comparative examples 1 to 4 were cut out in a size of 20cm X20 cm and conditioned at 0 ℃ for 24 hours. The heater used a 20W 15cm diameter disk-shaped electromagnetic heating device, on which a 20cm x 3mm polyurethane foam was placed as a backing layer of a sample to be measured, and then the sample to be measured was placed thereon to conduct a temperature rise test. The temperature of five points #1 to #5 given on the surface of the material before and after heating for 5 minutes was measured and recorded by an infrared thermometer, and the temperature difference Δ T between the two was calculated as the result of the temperature rise test of the sample to be tested, as detailed in the following table. Wherein the measurement site #1 is located at the center of the specimen and #2 to #5 are uniformly distributed on a circumference of 7cm from the center of the specimen.

As can be seen from the above table, the ferromagnetic material used in the examples has a higher relative permeability and a higher induced eddy current in the alternating electromagnetic field than the diamagnetic material used in comparative example 1 and the paramagnetic material used in comparative example 2, so that the ultrafine fiber base cloth containing the filler can be rapidly heated. In addition, the embodiment adopts the coupling agent to combine the filler and the polyamide-6 fiber, compared with the scheme without the coupling agent in the comparative example 3, the combination degree of the filler and the polyamide-6 fiber is higher, the distribution of the filler and the polyamide-6 fiber in the superfine fiber base cloth is more uniform, and the heat source is more uniform when electromagnetic heating is carried out.

In conclusion, the ferromagnetic filler is subjected to surface treatment by the coupling agent and is added into the superfine fiber base layer, so that the electromagnetic heating performance of the prepared polyurethane superfine fiber synthetic leather can be realized, the problems of poor appearance and hand feeling, complex process and the like of the traditional coating heating cotton scheme are solved, and the defect of uneven heat supply of the traditional heating scheme is overcome. The invention is applied to parts such as automobile steering wheels, seats and the like, can give consideration to the sensing effect and the heating function of the parts, and has high comfort.

One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:

(1) according to the method provided by the embodiment of the invention, the ferromagnetic filler can be uniformly dispersed by performing surface treatment on the coupling agent, and is attached to the surface of the polyamide-6 fiber by the coupling agent, so that the agglomeration is avoided to form large granular lumps. In the process of melt extrusion and spinning of the sea-island fiber, because of the polarity difference of the polyamide-6 and the polyethylene fiber, the ferromagnetic filler has stronger affinity to the polyamide-6 fiber, is connected with the polyamide-6 fiber by matching with a coupling agent, and is easier to remain in the superfine fiber base cloth after decrement fiber splitting, thereby realizing the electromagnetic heating function of the polyurethane superfine fiber synthetic leather. Meanwhile, the heat conductivity coefficient of the used filler is higher than that of the superfine fiber base cloth, so that the problem of uneven heat supply in the traditional heating scheme can be solved;

(2) according to the method provided by the embodiment of the invention, the ferromagnetic filler is dispersed in the superfine fiber base cloth layer, so that the polyurethane leather layer attached to the base cloth layer is not affected, and the performances of the traditional polyurethane superfine fiber synthetic leather, such as material performances of wear resistance, light aging resistance, chemical medium resistance and the like, and sensing performances of appearance, touch feeling and the like, are maintained;

(3) according to the application of the synthetic leather provided by the embodiment of the invention, the coated electromagnetic induction heating device can directly heat the polyurethane superfine fiber synthetic leather, so that the subsequent steps in the traditional processes of coating and heating cotton and the like are avoided, and the problems of poor appearance and hand feeling, complex process and the like of the coated and heating cotton scheme are solved.

Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.