Super-soft nonwoven fabric, and preparation method and application thereof

Abstract

The application provides an ultra-soft non-woven fabric and a preparation method and application thereof, and the preparation method comprises the following steps: preparing a spun-bond layer, mixing spun-bond layer raw materials according to a proportion, and then performing screw extrusion melting, spinning, drawing and web laying to obtain the spun-bond layer; preparing a melt-blown layer, mixing melt-blown layer raw materials according to a proportion, and then performing screw extrusion melting and spinning web laying to obtain the melt-blown layer; taking the melt-blown layer as an intermediate layer, laying the spun-bond layer on both sides of the melt-blown layer to obtain a three-layer structure, and then performing hot-pressing adhesion to obtain the ultra-soft non-woven fabric, wherein the mass ratio of the intermediate layer to the ultra-soft non-woven fabric is 25-35%. The raw materials of the spun-bond layer comprise ethylene-octene copolymer, polypropylene, antistatic material and slip material, the mechanical property and skin friendliness of the non-woven fabric can be significantly improved through improvement of the spun-bond layer material, and the prepared ultra-soft non-woven fabric can be applied to preparation of hand-washing clothes, and has a good application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile materials, in particular to a super-soft non-woven fabric and a preparation method and application thereof. BACKGROUND

[0002] At present, the hand-washing clothes mostly use traditional SMS non-woven fabric, which has the advantages of light weight, good antibacterial property and low cost, but since the surface material of the SMS non-woven fabric in the prior art is PP fiber, the hand feeling of the fabric surface is poor, the fabric surface is relatively thick, the uniformity is not good, and it is not comfortable to wear close to the body. In order to ensure the mechanical properties of the SMS non-woven fabric as much as possible, the proportion of the surface material is large, so it also leads to a significant decrease in the hiding property of the SMS non-woven fabric, which is not conducive to the privacy protection of the wearer when used as a material for making hand-washing clothes. SUMMARY

[0003] Therefore, the present application provides a super-soft non-woven fabric with better flexibility and stronger hiding property, and a preparation method and application thereof.

[0004] The technical scheme of the present application is realized as follows: the present application provides a preparation method of a super-soft non-woven fabric, which specifically comprises the following steps:

[0005] Preparation of the spun-bond layer, mixing the raw materials of the spun-bond layer according to the proportion, then extruding and melting through a screw, spinning, drawing and laying the web to obtain the spun-bond layer;

[0006] Preparation of the melt-blown layer, mixing the raw materials of the melt-blown layer according to the proportion, then extruding and melting through a screw, spinning and laying the web to obtain the melt-blown layer;

[0007] Preparation of the non-woven fabric, taking the melt-blown layer as the middle layer, laying the spun-bond layer on both sides of the melt-blown layer to obtain a three-layer structure, and then hot-pressing and bonding the three-layer structure to obtain the super-soft non-woven fabric, wherein the mass ratio of the middle layer to the super-soft non-woven fabric is 25-35%.

[0008] On the basis of the above technical scheme, preferably, the raw materials of the spun-bond layer comprise, by mass fraction:

[0009]

[0010] On the basis of the above technical scheme, preferably, the ethylene-octene copolymer is subjected to a modification treatment, and the method of the modification treatment comprises mixing the ethylene-octene copolymer with caprolactam according to a mass ratio of 100:(1-2), then extruding and granulating through a screw extruder to obtain a modified ethylene-octene copolymer.

[0011] On the basis of the above technical scheme, preferably, the antistatic material is fatty alcohol polyoxyethylene ether phosphate salt, and the slip material is one of polyol ester and fatty acid ester.

[0012] More preferably, the raw material of the melt-blown layer is polyethylene or polypropylene.

[0013] On the basis of the above technical scheme, preferably, the method for preparing the spun-bond layer comprises the following steps: mixing raw materials of the spun-bond layer according to a proportion, then extruding by using a screw extruder, the temperature of the screw extruder is 180-220 DEG C, then conveying to a spinning beam after melt filtration, the temperature is kept at 215-220 DEG C during the process, the pressure of the spinning beam extrusion is 6-8 MPa, spinning by using air side cooling at 20-30 DEG C and 0.5-1.2 m / s, and obtaining the spun-bond layer after drafting and laying.

[0014] On the basis of the above technical scheme, preferably, the method for preparing the melt-blown layer comprises the following steps: mixing raw materials of the melt-blown layer according to a proportion, then heating to 190-260 DEG C, extruding by using a screw extruder, then conveying to a spinning beam after melt filtration, the temperature is kept at 230-235 DEG C during the process, the pressure of the spinning beam extrusion is 6-8 MPa, spinning by using air side cooling at 20-30 DEG C and 0.5-1.2 m / s, and obtaining the melt-blown layer after drafting and laying.

[0015] The application further provides a super-soft non-woven fabric prepared by the above method.

[0016] The application further provides application of the super-soft non-woven fabric prepared by the above method in hand-washing clothes.

[0017] The super-soft non-woven fabric, the preparation method and the application thereof have the following beneficial effects compared with the prior art:

[0018] (1) The super-soft non-woven fabric provided by the application increases the amount of the melt-blown layer, thereby overcoming the poor masking problem of conventional SMS non-woven fabrics.

[0019] (2) In order to avoid the problem of mechanical performance flat fork caused by the decrease of the amount of the spun-bond layer, the raw material of the spun-bond layer is improved in the application, which not only improves the mechanical performance but also makes the non-woven fabric of the application have good flexibility and skin-friendliness, and the heating temperature in the preparation process is lower than that in the conventional process, which is more energy-saving and environmentally friendly.

[0020] (3) The super-soft non-woven fabric prepared by the application can be applied to the preparation of hand-washing clothes, which can significantly improve the wearing comfort of the hand-washing clothes and has good privacy. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0022] In view of the poor performance of the hand-washing clothes cover in the prior art, the material and composition of the non-woven fabric for preparing the hand-washing clothes need to be improved. The conventional hand-washing clothes are usually prepared from SMS non-woven fabric, which includes two sides of spun-bond non-woven fabric and a melt-blown non-woven fabric sandwiched in the middle. The main factor affecting the performance of the cover is the relative thickness of the melt-blown non-woven fabric. Therefore, the present application provides a solution to increase the relative amount of the middle melt-blown layer to increase the thickness and improve the performance of the cover.

[0023] However, the unit area gram weight of the SMS non-woven fabric for making the hand-washing clothes is usually 40-60 gsm. Therefore, in order to increase the thickness of the melt-blown layer, the thickness of the corresponding spun-bond layer is reduced, which will inevitably lead to a decrease in mechanical properties. In order to avoid this problem, the raw material for preparing the spun-bond layer is improved in the present application. The conventional raw material is PP material. In the present application, polypropylene and ethylene-octene copolymer are used as the main material to overcome the problem of poor mechanical properties. At the same time, since the hardness of the PP material is high and the skin-friendliness is not good, it will affect the experience when wearing the hand-washing clothes. In the present application, the ethylene-octene copolymer is modified to have better skin-friendliness to solve the problems of skin-friendliness, cover performance and mechanical strength. The specific implementation is as follows:

[0024] Example 1

[0025] Ethylene-octene copolymer 15 kg, polypropylene 75 kg, fatty alcohol polyoxyethylene ether phosphate sodium 0.5 kg and polyol ester 0.5 kg were weighed respectively, mixed uniformly, then extruded by a screw extruder at 180℃, filtered, and then conveyed to a spinning box. The temperature of the extruder, filtering device and spinning box was maintained at 215℃, the pressure of the spinning box was 6 MPa, and after extrusion, the extruded product was cooled by cold air at 12℃ at a wind speed of 0.5 m / s, and then drawn, laid and obtained a spun-bond layer of 32.5 gsm.

[0026] Then, 100 kg of polyethylene was heated to 190℃, extruded by a screw extruder, filtered, and then conveyed to a spinning box. The temperature of the extruder, filtering device and spinning box was maintained at 230℃, the pressure of the spinning box was 6 MPa, and after extrusion, the extruded product was cooled by cold air at 12℃ at a wind speed of 0.5 m / s, and then drawn, laid and obtained a melt-blown layer of 25 gsm.

[0027] The spunbond layer is compounded on both sides of the melt-blown layer, and a heat-pressing bonding treatment is performed to obtain the SMS super-soft non-woven fabric.

[0028] Comparative Example 1

[0029] Ethylene-octene copolymer 15 kg, polypropylene 75 kg, fatty alcohol polyoxyethylene ether phosphate sodium 0.5 kg, and polyol ester 0.5 kg are weighed respectively, uniformly mixed, extruded at 180℃ by a screw extruder, filtered, and then conveyed to a spinning box, the temperature of the extruder, filtering device, and spinning box is maintained at 215℃, the pressure of the spinning box extrusion is 6 MPa, after extrusion, cold air at 12℃ is used for air cooling at a wind speed of 0.5 m / s, and then drawing and webbing are performed to obtain a 42.5 gsm spunbond layer.

[0030] Polyethylene 100 kg is heated to 190℃, extruded by a screw extruder, filtered, and then conveyed to a spinning box, the temperature of the extruder, filtering device, and spinning box is maintained at 230℃, the pressure of the spinning box extrusion is 6 MPa, after extrusion, cold air at 12℃ is used for air cooling at a wind speed of 0.5 m / s, and then drawing and webbing are performed to obtain a 15 gsm melt-blown layer.

[0031] The spunbond layer is compounded on both sides of the melt-blown layer, and a heat-pressing bonding treatment is performed to obtain the SMS super-soft non-woven fabric.

[0032] Comparative Example 2

[0033] Polypropylene 91 kg is extruded at 180℃ by a screw extruder, filtered, and then conveyed to a spinning box, the temperature of the extruder, filtering device, and spinning box is maintained at 215℃, the pressure of the spinning box extrusion is 6 MPa, after extrusion, cold air at 12℃ is used for air cooling at a wind speed of 0.5 m / s, and then drawing and webbing are performed to obtain a 32.5 gsm spunbond layer.

[0034] Polyethylene 100 kg is heated to 190℃, extruded by a screw extruder, filtered, and then conveyed to a spinning box, the temperature of the extruder, filtering device, and spinning box is maintained at 230℃, the pressure of the spinning box extrusion is 6 MPa, after extrusion, cold air at 12℃ is used for air cooling at a wind speed of 0.5 m / s, and then drawing and webbing are performed to obtain a 25 gsm melt-blown layer.

[0035] The spunbond layer is compounded on both sides of the melt-blown layer, and a heat-pressing bonding treatment is performed to obtain the SMS super-soft non-woven fabric.

[0036] Comparative Example 3

[0037] Take 91 kg of polypropylene, extrude with a screw extruder at 180℃, then filter, deliver to the spinning beam, the temperature of the extruder, filter equipment and spinning beam is kept at 230℃, the pressure of the spinning beam is 6 MPa, after extrusion, use 12℃ cold air to cool at the wind speed of 0.5 m / s, then draw, lay to get 32.5 gsm of the spun-bonded layer;

[0038] Take another 100 kg of polyethylene, heat to 190℃, extrude with a screw extruder, then filter, deliver to the spinning beam, the temperature of the extruder, filter equipment and spinning beam is kept at 230℃, the pressure of the spinning beam is 6 MPa, after extrusion, use 12℃ cold air to cool at the wind speed of 0.5 m / s, then draw, lay to get 25 gsm of the melt-blown layer;

[0039] Composite the spun-bonded layer on both sides of the melt-blown layer, heat and press to get the SMS super-soft non-woven fabric.

[0040] Example 2

[0041] Preparation of the modified ethylene-octene copolymer:

[0042] Take 20 kg of ethylene-octene copolymer and 0.2 kg of caprolactam, mix well, then add to the screw extruder and heat to 190℃, blend, extrude and granulate to get the modified ethylene-octene copolymer.

[0043] Take 20 kg of the modified ethylene-octene copolymer, 78 kg of polypropylene, 1 kg of sodium fatty alcohol polyoxyethylene ether phosphate and 1 kg of fatty acid ester respectively, mix well, then extrude with a screw extruder at 200℃, then filter, deliver to the spinning beam, the temperature of the extruder, filter equipment and spinning beam is kept at 218℃, the pressure of the spinning beam is 7 MPa, after extrusion, use 15℃ cold air to cool at the wind speed of 1 m / s, then draw, lay to get 35 gsm of the spun-bonded layer;

[0044] Take another 100 kg of polypropylene, heat to 230℃, extrude with a screw extruder, then filter, deliver to the spinning beam, the temperature of the extruder, filter equipment and spinning beam is kept at 232℃, the pressure of the spinning beam is 7 MPa, after extrusion, use 15℃ cold air to cool at the wind speed of 1 m / s, then draw, lay to get 30 gsm of the melt-blown layer;

[0045] Composite the spun-bonded layer on both sides of the melt-blown layer, heat and press to get the SMS super-soft non-woven fabric.

[0046] Example 3

[0047] Preparation of the modified ethylene-octene copolymer:

[0048] Take 25kg ethylene-octene copolymer and 0.5kg caprolactam, mix evenly, and then add to the screw extruder and heat to 200℃, blend extrusion and granulation to obtain modified ethylene-octene copolymer.

[0049] Take ethylene-octene copolymer 25kg, polypropylene 80kg, fatty alcohol polyoxyethylene ether phosphate sodium 1.5kg and polyol ester 1.5kg respectively, mix evenly, and then extrude at 220℃ by using a screw extruder, and then filter and convey to a spinning box, the temperature of the extruder, filtering equipment and spinning box is kept at 220℃, the pressure of the spinning box extrusion is 8MPa, after extrusion, cold air at 20℃ is used for air cooling at a wind speed of 1.2m / s, and then drawing and laying are carried out to obtain a 32.5gsm spun-bonded layer;

[0050] Take 100kg polyethylene and heat to 260℃, extrude by using a screw extruder, and then filter and convey to a spinning box, the temperature of the extruder, filtering equipment and spinning box is kept at 235℃, the pressure of the spinning box extrusion is 8MPa, after extrusion, cold air at 20℃ is used for air cooling at a wind speed of 1.2m / s, and then drawing and laying are carried out to obtain a 35gsm melt-blown layer;

[0051] The spun-bonded layer is compounded on both sides of the melt-blown layer, and a hot-pressing bonding treatment is carried out to obtain an SMS super-soft non-woven fabric.

[0052] The super-soft non-woven fabrics prepared by the examples and the comparative examples are respectively subjected to hydrostatic pressure test, softness test, skin-friendly feeling test and masking performance test, and the test results are shown in the following table:

[0053]

[0054]

[0055] It can be seen that the super-soft non-woven fabric prepared by the scheme of the present application has good softness, high mechanical property and good skin-friendliness, and the modified non-woven fabric has better skin-friendliness, and the thickening of the melt-blown layer makes the masking better, which has good application prospect in the field of hand-washing clothes.

[0056] In fact, by improving the raw material ratio of the spun-bonded layer, the flowability of the spun-bonded layer melt can be improved, the spinning temperature can be reduced, and the purpose of energy saving can be achieved.

[0057] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for producing an ultra-soft nonwoven fabric, characterized by, The method comprises the following steps: Preparation of the spunbond layer: the raw materials of the spunbond layer are mixed according to the proportion, then are extruded by a screw extruder, are spun, are drawn and laid, and the spunbond layer is obtained; Preparation of the meltblown layer: the raw materials of the meltblown layer are mixed according to the proportion, then are extruded by a screw extruder, and are laid, and the meltblown layer is obtained; Preparation of the non-woven fabric: the meltblown layer is taken as the middle layer, the spunbond layers are laid on both sides of the meltblown layer, and a three-layer structure is obtained, and the three-layer structure is hot-pressed and bonded, and the super-soft non-woven fabric is obtained, wherein the mass ratio of the middle layer to the super-soft non-woven fabric is 25-35%; The raw materials of the spunbond layer comprise, in terms of mass fraction: The ethylene-octene copolymer is subjected to modification treatment, and the method of the modification treatment comprises the following steps: the ethylene-octene copolymer is mixed with caprolactam according to a mass ratio of 100: (1-2), and then is extruded and granulated by a screw extruder, so that the modified ethylene-octene copolymer is obtained.

2. The method for producing an ultra-soft nonwoven fabric according to claim 1, wherein The antistatic material is a fatty alcohol polyoxyethylene ether phosphate salt, and the slip material is one of a polyol ester and a fatty acid ester.

3. The method for preparing the ultra-soft nonwoven fabric as described in claim 1, characterized in that, The raw materials of the meltblown layer are polyethylene or polypropylene.

4. The method for preparing the ultra-soft nonwoven fabric as described in claim 1, characterized in that, The method for preparing the spunbond layer comprises the following steps: the raw materials of the spunbond layer are mixed according to the proportion, are extruded by a screw extruder, the temperature of the screw extruder is 180-220 DEG C, then are conveyed to a spinning box through melt filtration, the temperature is kept at 215-220 DEG C in the process, the pressure of the spinning box is 6-8 MPa, the air side wind cooling is performed at 12-20 DEG C and 0.5-1.2 m / s, the spunbond layer is obtained through drawing and laying.

5. The method for preparing the ultra-soft nonwoven fabric as described in claim 1, characterized in that, The method for preparing the meltblown layer comprises the following steps: the raw materials of the meltblown layer are mixed according to the proportion, are heated to 190-260 DEG C, are extruded by a screw extruder, then are conveyed to a spinning box through melt filtration, the temperature is kept at 230-235 DEG C in the process, the pressure of the spinning box is 6-8 MPa, the air side wind cooling is performed at 20-30 DEG C and 0.5-1.2 m / s, and the meltblown layer is obtained through drawing and laying.

6. The super-soft non-woven fabric prepared by the method according to any one of claims 1-5.

7. The application of the super-soft non-woven fabric prepared by the method according to any one of claims 1-5 in the preparation of hand-washing clothes.

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