CN110983630A

Movatterモバイル変換

Info

Publication number: CN110983630A
Application number: CN201911266439.8A
Authority: CN
Inventors: 焦安峰; 李世磊
Original assignee: Qingdao Canaan Meidi Household Articles Co ltd
Current assignee: Qingdao Canaan Meidi Household Articles Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-04-10
Also published as: JP2021092004A; JP6875568B1

Abstract

The invention provides a temperature-regulating non-woven fabric which is composed of fibers with a sheath-core structure, wherein a sheath layer is made of a composite material obtained by compounding paraffin wrapped by microcapsules containing phase-change materials and PE, and the melting spinning temperature of the sheath layer material is 205-215 ℃ in the melting spinning process, so that the loss rate of enthalpy value of the phase-change materials is ensured within 10% while the spinning smoothness is ensured; the core layer is made of PP, the skin layer is melted at a lower temperature during hot rolling to bond the fiber web, and the core material has a higher melting point and is not influenced, so that the performance can be kept unchanged, and the finally obtained non-woven fabric is soft in hand feeling, has the texture of silk, is high in strength, good in stretching performance and good in temperature regulation performance. The invention is carried out at the melting temperature lower than that of the sheath material PE in the hot rolling bonding process, promotes the crystallization of the core layer PP under the specific pressure and the hot rolling bonding speed, and ensures good web forming property and softness and fluffiness.

Description

Temperature-adjusting non-woven fabric, and preparation method and application thereof

Technical Field

The invention belongs to the technical field of textiles, and particularly relates to a temperature-regulating non-woven fabric, and a preparation method and application thereof.

Background

With the increase of the demands of the whole textile market, the demands of non-woven fabrics as important auxiliary materials of textiles are increasing continuously; the textile fabric gradually becomes intelligent and functional; the non-woven fabric is composed of oriented or random fibers, and has the characteristics of moisture resistance, air permeability, flexibility, light weight, low price, recycling and the like, so that the non-woven fabric is widely applied. With the development of the textile market, the requirements of textiles on non-woven fabrics are continuously increased. The non-woven fabric is required to have performances of air permeability, softness, antibiosis and the like, and certain temperature regulation performance in special environment, for example, in hot summer, the raw material non-woven fabric for textiles is required to have certain temperature regulation performance, so that the comfort degree of human body use is improved.

In order to obtain textile materials with temperature regulation performance, a mode of adding phase-change materials is adopted in the prior art. The phase change material is a substance which changes the state of a substance under the condition of constant temperature and can provide latent heat. The process of changing physical properties is called a phase change process, and in this case, the phase change material absorbs or releases a large amount of latent heat. The phase change material can be divided into solid-solid phase change, solid-liquid phase change, solid-gas phase change and liquid-gas phase change according to the phase change process, and the volume of the phase change material is greatly changed due to the generation of gas in the phase change process, so that the solid-gas phase change material and the liquid-gas phase change material are easy to leak in the phase change process, and the requirement on packaging is high. Paraffin is a commonly used phase-change material, but the paraffin serving as the phase-change material has the defects of low heat conductivity coefficient, easy leakage of solid-liquid phase change and the like.

The prior art textile materials have a method for increasing the temperature adjusting performance by using a phase change material, but the method is generally carried out by coating the phase change material between layers of the textile material or by solution spinning. The coating method has the problems of poor washing fastness, solvent is required for solution spinning, and solvent retention is caused. The melt spinning mode also has the technical problems of high loss rate of the phase-change material, uneven spinning and the like. And the single high polymer material and the phase change material are adopted for compounding, so that the problems of insufficient softness or poor air permeability and the like can also exist.

Disclosure of Invention

In order to solve the technical problems, the invention provides a temperature-regulating non-woven fabric of a skin-core structure, which is formed by two matrix raw materials and a phase-change material, wherein the temperature-regulating non-woven fabric is of the skin-core structure, the skin layer structure is formed by a composite material containing the phase-change material and PE, the core layer material is formed by PP, and the shrinkage rates of the core layer material and the skin layer material are different, so that the temperature-regulating non-woven fabric is endowed with good flexibility, and the skin layer material formed by paraffin wrapped by the phase-change material microcapsule and the PE endows the temperature-regulating material with good temperature.

The invention aims to provide a temperature-regulating non-woven fabric.

The invention also aims to provide a preparation method of the temperature-regulating non-woven fabric.

The invention further aims to provide the temperature-adjusting mattress obtained by utilizing the temperature-adjusting non-woven fabric.

According to the purpose of the invention, the temperature-regulating non-woven fabric is composed of fibers with a skin-core structure, wherein the raw material of a core layer of the fibers with the skin-core structure is PP, the raw material of a skin layer of the fibers with the skin-core structure is a composite material of PE and a phase-change material, and the phase-change material is paraffin wrapped by microcapsules;

the preparation method of the skin layer raw material comprises the following steps:

taking a PE sheet, adding the paraffin wrapped by the microcapsule, uniformly mixing, and carrying out melt extrusion to obtain a master batch;

and then carrying out co-extrusion, grain cutting and drying on the master batch and the PE sheet to obtain the skin layer raw material.

The temperature-regulating non-woven fabric provided by the invention is composed of fibers with a skin-core structure, the skin layer is made of a composite material obtained by compounding paraffin wrapped by microcapsules containing phase-change materials and PE, the core layer is made of PP, the skin layer is melted at a lower temperature during hot rolling in the forming process to bond a fiber web, the core material has a higher melting point, and the hot rolling is not influenced, so that the performance can be kept unchanged, and the finally obtained non-woven fabric is soft in hand feeling, has a silk texture, is high in strength, good in stretching performance, resistant to washing and good in temperature regulating performance.

Preferably, the molecular weight of the PE is 40000-400000. The polyethylene with the molecular weight of 40000-400000 has the thermal conductivity coefficient of about 0.35 and moderate price, so that the polyethylene has good economic benefit and thermal conductivity, and can improve the temperature regulation performance and economic value of the non-woven fabric.

Preferably, the weight ratio of the core layer material to the sheath layer material of the fibers of the sheath-core structure is 1: 0.01-99.

Preferably, the weight ratio of the microencapsulated paraffin to the PE is 1-4: 10.

Preferably, the shell material of the paraffin wax wrapped by the microcapsule is one of melamine modified urea formaldehyde resin, melamine formaldehyde resin and gelatin.

Preferably, the preparation method of the melamine modified urea resin comprises the following steps: adding 1-1.5 parts of formaldehyde solution and 0.5-0.8 part of urea into a reaction container, adjusting the pH value to 8-8.5, heating to 85-90 ℃, carrying out heat preservation reaction, then cooling to 65-70 ℃, adjusting the pH value to 4-5, heating to 75-80 ℃, then adding 0.1-0.3 part of urea, after the reaction is finished, adjusting the pH value to 8-9, heating to 85-90 ℃, adding 0.05 part of melamine, 0.1-0.3 part of urea and 0.1 part of NaCl, and finishing the reaction to obtain the melamine modified urea-formaldehyde resin.

According to the invention, the method of adding raw materials one by one is adopted in the preparation process of the melamine modified urea-formaldehyde resin, and NaCl is added in the reaction process, so that the high temperature resistance of the phase-change material is improved, and the phase-change material is not degraded in the process of adding the phase-change material into PE and in the process of melt spinning, thereby ensuring the enthalpy value of the temperature-regulating material.

The phase-change material provided by the invention has the advantages of large energy storage capacity, good sealing performance, approximate phase-change temperature point and body temperature, solution adjustment and no harm to human bodies.

In the fiber with the skin-core structure, the skin layer material is a mixture obtained by blending the microcapsule-coated paraffin and the PE, the microcapsule-coated paraffin and the microcapsule shell material are made of the materials, and the materials can be well mixed with the PE, so that the mixing uniformity between the microcapsule-coated paraffin and the PE can be improved, the temperature adjusting performance of the skin layer material is ensured, in addition, the microcapsule-coated paraffin ensures that the paraffin does not leak, the sealing performance is good, and the stability of the phase change material in the material is ensured. The paraffin and PE wrapped by the microcapsule in the skin material are in the weight ratio range, and the obtained composite material is excellent in mechanical property and good in temperature regulation performance.

Preferably, the particle size of the microcapsule-coated paraffin is 150-200 nm. The particle size of the paraffin wrapped by the microcapsule is small, on one hand, good dispersion can be realized in a matrix material PE, and the durability and stability of a phase change material can be ensured, and on the other hand, a spinneret orifice cannot be blocked in the process of spinneret spraying.

Preferably, the enthalpy value of the microcapsule-coated paraffin is more than 180J/g.

Preferably, the sheath material of the fibers of the sheath-core structure has an enthalpy value of 15 to 70J/g.

According to the invention, the phase-change material is added into the skin material of the non-woven fabric, so that the non-woven fabric is endowed with temperature regulation performance.

The invention provides a preparation method of the temperature-regulating non-woven fabric, which comprises the following steps:

respectively taking core layer raw material PP sheet, cortex layer raw material PE and phase change material composite materials, respectively carrying out melt spinning, composite spinning, air flow stretching, dividing and lapping, hot rolling and bonding, and reinforcing into cloth to obtain the temperature-regulating non-woven fabric;

the melt spinning temperature of the skin layer material is 205-215 ℃;

the temperature of the hot rolling bonding is 120-125 ℃, the pressure of the hot rolling bonding is 65-70kfg/cm, and the speed of the hot rolling bonding is 230-240 m/min.

According to the invention, in the preparation process of the non-woven fabric with the skin-core structure, adopted raw materials are different, and the phase-change material needs to be added into the skin layer material, so that various processing performances need to be considered in the processing process. The temperature of the melt spinning of the sheath material provided by the invention is 205-215 ℃, and the enthalpy loss rate of paraffin wrapped by the phase-change material microcapsule is lower than 10% at the moment, so that the spinning smoothness can be ensured; in order to ensure the flexibility and the web forming performance of the skin-core structural fiber, the invention is carried out at the temperature lower than the melting temperature of the skin layer material PE in the hot rolling and bonding process, because the skin-core two compositions have different melting points, thermal conductivities, crystallization structures and crystallization rates, the PE molecular chain is regular, can be laid into crystal lattices in a saw-tooth shape with the minimum energy and the most stability, is easy to crystallize, the PP molecular chain has a spiral structure, is regularly arranged and easy to crystallize, but has poorer crystallization performance than the PE, the temperature difference is formed by high-speed spinning and low-temperature hot rolling bonding in the spinning process, the crystallization of the core layer PP is promoted under specific pressure and hot rolling bonding speed, the difference of crystallization between the core material and the skin material is reduced, thereby ensuring good net forming performance, due to the different shrinkage rates of the core layer and the skin layer in the cooling process, the flexibility and the bulkiness of the obtained material can be ensured.

The invention provides a temperature-adjusting mattress, which comprises a surface layer, a non-woven fabric layer, a filling layer and a bottom layer which are arranged from top to bottom in sequence; the material of the non-woven fabric layer is the temperature-regulating non-woven fabric.

The non-woven fabric with the temperature regulating performance can be applied to bedding articles and can also be applied to other textiles.

Preferably, the material of the surface layer is one or more of nylon, terylene, cotton, hemp, polyethylene and rayon,

the filling layer is a layered non-woven fabric or foaming resin made of one of terylene, polyester fiber, polypropylene, cotton, hemp and rayon;

the bottom layer material is cloth made of one or more of nylon, terylene, cotton, hemp, polyethylene and rayon.

Preferably, the gram weight of the surface layer material is 70-280g/m²The gram weight of the bottom layer material is 50-300g/m². The surface layer material provided by the invention combines the material and the gram weight, so that the comfort level and the use feeling on the skin are improved, the comfort level of skin contact is reduced when the gram weight is insufficient, the cost is increased when the gram weight is too heavy, the weight is increased, and the use performance is reduced. The bottom layer material, in combination with the grammage, has the function of supporting the entire multilayer sheet to maintain its shape.

The invention has the beneficial effects that:

1. the invention provides a temperature-regulating non-woven fabric which is composed of fibers with a skin-core structure, wherein a skin layer is made of a composite material obtained by compounding paraffin wrapped by microcapsules containing phase-change materials and PE, a core layer is made of PP, the skin layer is melted at a lower temperature during hot rolling in the forming process to bond a fiber web, and the core material has a higher melting point and is unaffected by hot rolling, so that the performance can be kept unchanged.

2. The temperature-regulating non-woven fabric provided by the invention has excellent temperature regulating performance, good flexibility, air permeability, fluffiness and softness and good use performance, and is suitable for large-scale industrial production.

3. According to the preparation method of the temperature-regulating non-woven fabric, in the melt spinning process, the melt spinning temperature of the cortical material is 205-215 ℃, and the enthalpy loss rate of paraffin wrapped by the phase-change material microcapsule is lower than 10% at the moment, so that smooth spinning can be ensured; in order to ensure the flexibility and the net forming performance of the skin-core structure fiber, the invention is carried out at the temperature lower than the melting temperature of the skin layer material PE in the hot rolling and bonding process, because the melting point, the thermal conductivity, the crystal structure and the crystallization rate of the skin-core structure are different, the crystallization of the core layer PP is promoted under the specific pressure and the hot rolling and bonding speed, thereby ensuring the good net forming performance, and because the core layer and the skin layer have different shrinkage rates in the cooling process, the flexibility and the bulkiness of the obtained material can be ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a graph showing temperature changes when the temperature of a temperature-controlled nonwoven fabric obtained in example 3 and the temperature of a nonwoven fabric obtained in a comparative example are lowered;

FIG. 2 is a graph showing temperature changes at the time of heating the temperature-regulated nonwoven fabric obtained in example 3 and the nonwoven fabric obtained in comparative example.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example 1

The temperature-adjusting non-woven fabric is composed of fibers with a skin-core structure,

the core layer raw material of the fiber with the skin-core structure is PP,

the sheath raw material of the fiber of the sheath-core structure is a composite material of PE and a phase-change material,

the phase-change material is paraffin wrapped by microcapsules; the weight ratio of the paraffin wrapped by the microcapsule to the PE is 1: 10;

the shell material of the paraffin wrapped by the microcapsule is melamine modified urea-formaldehyde resin;

the particle size of the paraffin wrapped by the microcapsule is 150-200 nm;

the enthalpy value of the paraffin wrapped by the microcapsule is more than 180J/g;

the enthalpy value of the sheath material of the fiber of the sheath-core structure is 15-70J/g;

the weight ratio of the core layer material to the skin layer material of the fiber of the skin-core structure is 1: 0.01;

The preparation method of the temperature-regulating non-woven fabric comprises the following steps:

the melt spinning temperature of the skin layer material is 205 ℃;

the temperature of the hot rolling bonding is 120 ℃, the pressure of the hot rolling bonding is 65kfg/cm, and the speed of the hot rolling bonding is 230 m/min.

Example 2

the core layer raw material of the fiber with the skin-core structure is PP,

the phase-change material is paraffin wrapped by microcapsules; the weight ratio of the paraffin wrapped by the microcapsule to the PE is 4: 10;

the shell material of the paraffin wrapped by the microcapsule is melamine formaldehyde resin;

the particle size of the paraffin wrapped by the microcapsule is 150-200 nm;

the weight ratio of the core layer material to the skin layer material of the fiber of the skin-core structure is 1: 99;

the melt spinning temperature of the skin layer material is 215 ℃;

the temperature of the hot rolling bonding is 125 ℃, the pressure of the hot rolling bonding is 70kfg/cm, and the speed of the hot rolling bonding is 240 m/min.

Example 3

the core layer raw material of the fiber with the skin-core structure is PP,

the phase-change material is paraffin wrapped by microcapsules; the weight ratio of the paraffin wrapped by the microcapsule to the PE is 3: 10;

the shell material of the paraffin wrapped by the microcapsule is gelatin;

the particle size of the paraffin wrapped by the microcapsule is 150-200 nm;

the weight ratio of the core layer material to the skin layer material of the fiber of the skin-core structure is 65: 35;

the melt spinning temperature of the skin layer material is 210 ℃;

the temperature of the hot rolling bonding is 125 ℃, the pressure of the hot rolling bonding is 70kfg/cm, and the speed of the hot rolling bonding is 235 m/min.

Example 4

A temperature-adjusting mattress comprises a surface layer, a non-woven fabric layer, a filling layer and a bottom layer which are arranged from top to bottom in sequence; the material of the non-woven fabric layer is the temperature-adjusting non-woven fabric obtained in the embodiment 1;

the material of the surface layer is nylon,

the filling layer is a layered non-woven fabric made of terylene;

the bottom layer material is cloth made of nylon;

the gram weight of the surface layer material is 70g/m²；

The gram weight of the bottom layer material is 50g/m²。

Example 5

A temperature-adjusting mattress comprises a surface layer, a non-woven fabric layer, a filling layer and a bottom layer which are arranged from top to bottom in sequence; the material of the non-woven fabric layer is the temperature-adjusting non-woven fabric obtained in the embodiment 2;

the material of the surface layer is terylene,

the filling layer is made of polyester foam;

the bottom layer material is cloth made of terylene;

the gram weight of the surface layer material is 280g/m²；

The gram weight of the bottom layer material is 300g/m²。

Example 6

A temperature-adjusting mattress comprises a surface layer, a non-woven fabric layer, a filling layer and a bottom layer which are arranged from top to bottom in sequence; the material of the non-woven fabric layer is the temperature-adjusting non-woven fabric obtained in the embodiment 3;

the material of the surface layer is rayon,

the filling layer is a layered non-woven fabric made of terylene;

the bottom layer material is cloth made of rayon;

the gram weight of the surface layer material is 150g/m²；

The gram weight of the bottom layer material is 200g/m²。

Example 7

the material of the surface layer is cotton,

the filling layer is a layered non-woven fabric made of rayon;

the bottom layer material is cloth made of hemp;

the gram weight of the surface layer material is 150g/m²；

The gram weight of the bottom layer material is 230g/m²。

Example 8

the material of the surface layer is hemp,

the filling layer is made of foamed polypropylene;

the bottom layer material is non-woven fabric made of polyethylene;

the gram weight of the surface layer material is 100g/m²；

The gram weight of the bottom layer material is 250g/m²。

Comparative example 1

A non-woven fabric composed of fibers of a sheath-core structure,

the core layer raw material of the fiber with the skin-core structure is PP,

the sheath raw material of the fiber of the sheath-core structure is PE.

Test examples

The temperature-adjusting performance of the nonwoven fabrics obtained in example 3 and comparative example 1 was tested by lowering the temperature from 40 ℃ to 15 ℃ and measuring the temperature change of the nonwoven fabrics to obtain the curve of fig. 1; the temperature was increased from 15 ℃ to 40 ℃ and the temperature change of the nonwoven fabric was tested to obtain the curve of fig. 2.

As can be seen from the temperature change curves of fig. 1 and fig. 2, the temperature-regulated nonwoven fabric provided in example 3 of the present invention has a good temperature difference effect and good energy storage and release effects compared to the nonwoven fabric obtained in comparative example 1.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The temperature-adjusting non-woven fabric is characterized by comprising fibers with a skin-core structure, wherein a core layer raw material of the fibers with the skin-core structure is PP, a skin layer raw material of the fibers with the skin-core structure is a composite material of PE and a phase-change material, and the phase-change material is paraffin wrapped by microcapsules;

2. The temperature-regulating nonwoven fabric according to claim 1, wherein the weight ratio of the core layer material to the sheath layer material of the fibers of the sheath-core structure is 1: 0.01-99.

3. The temperature-regulating nonwoven fabric according to claim 1, wherein the weight ratio of the paraffin wax wrapped in the microcapsule to the PE is 1-4: 10.

4. The temperature-adjusting non-woven fabric according to claim 1, wherein the shell material of the paraffin wax wrapped by the microcapsule is one of melamine modified urea formaldehyde resin, melamine formaldehyde resin and gelatin.

5. The temperature-regulating non-woven fabric according to claim 1, wherein the particle size of the micro-capsule-coated paraffin is 150-200 nm.

6. The temperature-regulating nonwoven fabric according to claim 1, wherein the paraffin wax encapsulated in the microcapsule has an enthalpy of 180J/g or more.

7. The temperature-controlled nonwoven fabric according to claim 1, wherein the sheath material of the fibers of the sheath-core structure has an enthalpy value of 15 to 70J/g.

8. A method for preparing a temperature-regulating nonwoven fabric as claimed in any of claims 1 to 7, characterized by comprising the steps of:

the melt spinning temperature of the skin layer material is 205-215 ℃;

9. A temperature-adjusting mattress is characterized by comprising a surface layer, a non-woven fabric layer, a filling layer and a bottom layer which are arranged from top to bottom in sequence; the material of the non-woven fabric layer is the temperature-adjusting non-woven fabric in any one of claims 1 to 7.

10. The temperature-regulating mattress according to claim 9, wherein the material of said surface layer is one or more of nylon, polyester, cotton, hemp, polyethylene, rayon,