Spunlaced blended non-woven fabric as well as preparation method and application thereof

Abstract

The invention provides a spunlace blended non-woven fabric and a preparation method and application thereof, and relates to the technical field of sanitary material preparation. The preparation method of the spunlace blended non-woven fabric comprises the following steps that cotton fibers are subjected to first carding, and a cotton fiber net is obtained; performing second carding on the kapok fibers to obtain a kapok fiber net; coating the outer surface of the kapok fiber net with the cotton fiber net to obtain a mixed fiber net; the mixed fiber net is subjected to third carding, and a kapok-cotton composite fiber net is obtained; the kapok-cotton composite fiber net is subjected to spunlace, and the spunlace blended non-woven fabric is obtained. The spunlace blended non-woven fabric prepared by the method has better air permeability and oil absorption performance, is green, environment-friendly, soft and skin-friendly, has good human body contact performance, is natural and degradable, and does not cause any harmful pollution to human bodies and environments.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of sanitary materials, and in particular to a spunlace blended nonwoven fabric and a preparation method and application thereof. Background Art

[0002] With the development of society, people have an increasing demand for facial cleansing, especially in summer when the weather is hot and the facial skin is very prone to secrete oil. When facial oil is secreted too much, it can cause diseases such as seborrheic dermatitis and acne. Therefore, the demand for oil-absorbing facial tissues is getting higher and higher.

[0003] At present, most of the oil-absorbing facial tissues on the market are made of flax pulp and chemical fibers through the papermaking method. On the one hand, chemical fibers have poor air permeability and are non-degradable, which will cause environmental pollution after use; on the other hand, the oil-absorbing facial tissues prepared by the papermaking method are relatively stiff and not soft.

[0004] Kapok is the lightest and most hollow fiber among natural fibers. It has good skin-friendliness, air permeability and antibacterial properties. Its huge internal cavity makes it have a good development prospect in oil absorption applications. However, due to its poor cohesion and spinnability, its application is limited. Summary of the invention

[0005] The purpose of the present invention is to provide a spunlace blended nonwoven fabric and a preparation method and application thereof. The spunlace blended nonwoven fabric prepared by the present invention has good air permeability and excellent oil absorption performance, is green and environmentally friendly, soft and skin-friendly, has good human contactability, is naturally degradable, and will not cause any harmful pollution to the human body and the environment.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a method for preparing a spunlace blended nonwoven fabric, comprising the following steps:

[0008] The cotton fibers are first combed to obtain a cotton fiber web;

[0009] The kapok fibers are subjected to a second combing to obtain a kapok fiber web;

[0010] The cotton fiber web is wrapped on the outer surface of the kapok fiber web to obtain a mixed fiber web;

[0011] The mixed fiber web is subjected to a third carding to obtain a kapok-cotton composite fiber web;

[0012] The kapok-cotton composite fiber web is subjected to hydroentanglement to obtain a hydroentangled blended nonwoven fabric.

[0013] Preferably, the mass ratio of the kapok fiber to the cotton fiber is 3-9:1-7.

[0014] Preferably, the method of wrapping the cotton fiber web on the outer surface of the kapok fiber web comprises: laying the kapok fiber web on the cotton fiber web, and folding the composite of the kapok fiber web and the cotton fiber web in half so that the kapok fiber web is wrapped inside the cotton fiber web.

[0015] Preferably, the cotton fiber is raw cotton fiber that has not been chemically treated; and the kapok fiber is raw kapok fiber that has not been chemically treated.

[0016] Preferably, the water spurting pressure is 4-6 MPa.

[0017] Preferably, the water jet is a multi-pass water jet; the pressure of the latter water jet is higher than the pressure of the former water jet.

[0018] Preferably, the water jets are three-pass water jets; the pressures of the three-pass water jets are 4 MPa, 5 MPa and 6 MPa respectively.

[0019] Preferably, the hydroentanglement further includes drying; the drying temperature is 70-80°C.

[0020] The present invention provides a spunlace blended nonwoven fabric prepared by the preparation method described in the above technical solution.

[0021] The present invention provides application of the spunlace blended nonwoven fabric described in the above technical solution in oil-absorbing facial tissue.

[0022] The present invention provides a method for preparing a spunlace blended nonwoven fabric. The spunlace blended nonwoven fabric prepared by the present invention has uniform pores, small pore diameters, and a large number of uniform pores, thereby ensuring that the spunlace blended nonwoven fabric has good air permeability and good oil absorption and retention capabilities. The present invention uses cotton fiber and kapok fiber as raw materials to prepare the spunlace blended nonwoven fabric, which is naturally degradable, green and environmentally friendly, soft and skin-friendly, has good human contactability, and does not cause any harmful pollution to the human body and the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a scanning electron microscope image of the spunlace blended nonwoven fabric prepared in Example 3;

[0024] Figure 2 It is the pore size distribution line graph of the embodiment and the comparative example. DETAILED DESCRIPTION

[0025] The present invention provides a method for preparing a spunlace blended nonwoven fabric, comprising the following steps:

[0026] The cotton fibers are first combed to obtain a cotton fiber web;

[0027] The kapok fibers are subjected to a second combing to obtain a kapok fiber web;

[0028] The cotton fiber web is wrapped on the outer surface of the kapok fiber web to obtain a mixed fiber web;

[0029] The mixed fiber web is subjected to a third carding to obtain a kapok-cotton composite fiber web;

[0030] The kapok-cotton composite fiber web is subjected to hydroentanglement to obtain a hydroentangled blended nonwoven fabric.

[0031] The present invention performs a first combing on cotton fibers to obtain a cotton fiber web. In the present invention, the cotton fibers are preferably raw cotton fibers that have not been chemically treated. In the present invention, the fineness of the cotton fibers is preferably 1.0 to 1.5 dtex, and more preferably 1.3 dtex; the average length of the cotton fibers is preferably 32 to 42 mm, and more preferably 37 mm. The present invention has no special requirements for the specific process of the first combing, and the combing process well known to those skilled in the art can be used. In the present invention, the basis weight of the cotton fiber web is preferably 38 to 62 g / m 2 , more preferably 50 to 60 g / m 2 .

[0032] The present invention performs a second combing on the kapok fibers to obtain a kapok fiber web. In the present invention, the kapok fibers are preferably raw kapok fibers that have not been chemically treated. In the present invention, the fineness of the kapok fibers is preferably 0.52-0.71 dtex, more preferably 0.65 dtex; the average length of the kapok fibers is preferably 15-30 mm, more preferably 25 mm. The present invention has no special requirements for the specific process of the second combing, and the combing process well known to those skilled in the art can be used. In the present invention, the quantitative weight of the kapok fiber web is preferably 45-60 g / m 2 , more preferably 50 to 55 g / m 2 .

[0033] In the present invention, the mass ratio of the kapok fiber to the cotton fiber is preferably 3-9:1-7, and more preferably 5-7:3-5.

[0034] After obtaining the cotton fiber web and the kapok fiber web, the present invention wraps the cotton fiber web on the outer surface of the kapok fiber web to obtain a mixed fiber web. In the present invention, the method of wrapping the cotton fiber web on the outer surface of the kapok fiber web preferably includes: laying the kapok fiber web on the cotton fiber web, and folding the composite of the kapok fiber web and the cotton fiber web in half, so that the kapok fiber web is wrapped inside the cotton fiber web. The present invention adopts the above technical solution to wrap the shorter kapok fibers with the longer cotton fibers for combing, so that the kapok fibers and the cotton fibers are evenly mixed while minimizing the loss of the kapok fibers.

[0035] After obtaining the mixed fiber web, the present invention performs a third combing on the mixed fiber web to obtain a kapok-cotton composite fiber web. The present invention has no special requirements for the specific process of the third combing, and a combing process well known to those skilled in the art can be used. In the present invention, the third combing is preferably performed in a combing machine.

[0036] After obtaining the kapok-cotton composite fiber web, the present invention performs hydroentanglement on the kapok-cotton composite fiber web to obtain a hydroentangled blended nonwoven fabric. In the present invention, the hydroentanglement pressure is preferably 4 to 6 MPa.

[0037] In the present invention, the spunlace is preferably a multi-pass spunlace; the pressure of the latter spunlace is preferably higher than the pressure of the previous spunlace. In a specific embodiment of the present invention, the spunlace is a three-pass spunlace; the pressures of the three spunlaces are 4MPa, 5MPa and 6MPa, respectively. By adopting the above technical solution, the present invention can make the fibers in the kapok-cotton composite fiber web more tightly entangled as the spunlace pressure gradually increases, and the two fibers are fully mixed and evenly formed inside the material. More fine micropores are formed, making the spunlace blended nonwoven fabric lighter and thinner, while improving its oil absorption capacity and air permeability.

[0038] In the present invention, the water jetting method is preferably parallel water jetting. When the water jetting is three-pass water jetting, the water jetting sequence is preferably forward-reverse-forward. The screen speed of the water jetting is preferably 3.5-5 m / min, more preferably 4 m / min.

[0039] In the present invention, the hydroentanglement preferably also includes drying. In the present invention, the drying temperature is preferably 70-80°C, more preferably 75°C. In the present invention, the drying time is preferably 60-120 minutes, more preferably 90-100 minutes. The present invention adopts the above-mentioned technical solution. On the one hand, the fiber stays in the position during hydroentanglement, avoiding the thickening of the hydroentangled fiber web and the change of the internal structure due to elastic recovery in the later stage; on the other hand, it also avoids damage to the fiber surface due to high temperature, which affects its surface contact comfort and oil absorption capacity.

[0040] The present invention provides a spunlace blended nonwoven fabric prepared by the preparation method described in the above technical solution. In the present invention, the mass content of kapok fiber in the spunlace blended nonwoven fabric is preferably 30-90%, more preferably 50-70%. In the present invention, the average pore size of the spunlace blended nonwoven fabric is preferably 25-45 μm, more preferably less than 30 μm. The present invention uses kapok fiber and cotton fiber in combination to obtain a material with good oil absorption performance and skin-friendly softness.

[0041] The present invention provides the use of the spunlace blended nonwoven fabric described in the above technical solution in oil-absorbing facial tissue, which is preferably used directly as oil-absorbing facial tissue.

[0042] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] The kapok fiber and cotton fiber are respectively fed into the opening machine for opening and impurity removal, and then fed into the carding machine according to the kapok fiber accounting for 30% of the total mass ratio of the spunlace blended nonwoven fabric and the cotton fiber accounting for 70% of the total mass ratio of the spunlace blended nonwoven fabric, to obtain the kapok fiber web and the cotton fiber web. Among them, the fineness of the kapok fiber is 0.65dtex and the average length is 25mm; the fineness of the cotton fiber is 1.3dtex and the average length is 37mm; the basis weight of the kapok fiber web is 50g / m 2 The weight of the cotton fiber web is 60g / m 2 .

[0045] Laying the kapok fiber web on the cotton fiber web and folding it in half so that the kapok fiber web is wrapped inside the cotton fiber web, and feeding it into the carding machine again to obtain a kapok-cotton composite fiber web that is evenly mixed;

[0046] The kapok-cotton composite fiber web was subjected to three hydroentanglement treatments, the pressures of the three hydroentanglements were 4 MPa, 5 MPa, and 6 MPa respectively, a parallel hydroentanglement method was adopted, the hydroentanglement sequence was forward-reverse-forward, and the web curtain speed was 4 m / min.

[0047] The composite fiber web after the spunlace treatment was dried at a temperature of 75° C. for 90 minutes to obtain a spunlace blended nonwoven fabric.

[0048] Example 2

[0049] The preparation method is basically the same as that of Example 1, except that the kapok fiber accounts for 50% of the total mass of the spunlace blended nonwoven fabric, and the cotton fiber accounts for 50% of the total mass of the spunlace blended nonwoven fabric.

[0050] Example 3

[0051] The preparation method is basically the same as that of Example 1, except that the kapok fiber accounts for 70% of the total mass of the spunlace blended nonwoven fabric, and the cotton fiber accounts for 30% of the total mass of the spunlace blended nonwoven fabric.

[0052] Comparative Example 1

[0053] The preparation method is basically the same as that in Example 1, except that the mass ratio of kapok fiber to the total mass ratio of the spunlace blended nonwoven fabric is 0%, and the mass ratio of cotton fiber to the total mass ratio of the spunlace blended nonwoven fabric is 100%.

[0054] Comparative Example 2

[0055] The preparation method is basically the same as that in Example 1, except that the mass ratio of kapok fiber to the total mass ratio of the spunlace blended nonwoven fabric is 100%, and the mass ratio of cotton fiber to the total mass ratio of the spunlace blended nonwoven fabric is 0%.

[0056] Test Case

[0057] (1) Saturated oil absorption rate and oil retention rate test

[0058] According to the test method in the standard GB / T 24218.6-2010 "Test methods for textile nonwovens Part 6: Determination of absorbency", the oil absorption and oil retention of the sample was tested. The nonwoven samples prepared in the examples and comparative examples were cut into 10 cm × 10 cm sizes. Three pieces of each sample were cut, totaling 15 samples, and the weights were weighed and recorded. The nonwoven sample was then placed in a beaker containing the test oil, and after 15 minutes, it was taken out and transferred to a stainless steel sheet with a round hole and placed for 10 minutes (without liquid oil dripping). The weight of the nonwoven sample and the oil was tested to obtain the saturated oil absorption of the nonwoven sample to the oil. After standing for 24 hours, the weight of the nonwoven sample and the oil was tested to obtain its static oil retention rate. The calculation of the oil absorption ratio and the static oil retention rate are shown in formulas (1) and (2), respectively.

[0059]

[0060]

[0061] In formula (1) and (2): m 0 is the mass of nonwoven sample before oil absorption, g; m 1 is the mass of the nonwoven sample after oil absorption, g; m 2 It is the remaining mass of the nonwoven fabric sample after standing for 24 hours, g.

[0062] The average values ​​of the final oil absorption ratio and the static oil retention ratio are calculated and the results are shown in Table 1.

[0063] (2) Air permeability test

[0064] The air permeability of the sample was measured according to the method described in the standard GB / T 5453-1997 "Determination of Air Permeability of Textile Fabrics". The test points were ten randomly selected points away from the edge of the fabric. The test sample test head was round in shape with an area of ​​20 cm 2The pressure difference between the upper and lower surfaces of the vacuum pump airflow is 100Pa. Ten test values ​​are obtained and the average value is taken.

[0065] The test results are shown in Table 1.

[0066] Table 1 Comparison of air permeability, oil absorption rate and oil retention rate of nonwoven fabrics in the embodiments and comparative examples

[0067] Kapok to cotton ratio Air permeability (mm / s) Oil absorption rate (g / g) Static oil retention rate (%) Example 1 3：7 1032.83 23.22 93.66 Comparative Example 1 0：10 1066.95 22.03 93.63 Example 2 5：5 905.86 24.86 93.92 Example 3 7：3 1110.69 31.38 94.69 Comparative Example 2 10：0 876.23 28.89 93.56

[0068] According to the examples and comparative examples, when the kapok content is 70% and the cotton content is 30%, the air permeability, oil absorption rate and oil retention rate are the highest. This shows that adding kapok can indeed increase the oil absorption rate and oil retention of the nonwoven fabric, and the air permeability will also be significantly improved. It has great application potential in the preparation of oil-absorbing facial tissue.

[0069] (3) Figure 1 This is a scanning electron microscope image of the spunlace blended nonwoven fabric prepared in Example 3. Figure 1 It can be seen that the spunlace did not destroy the central cavity structure of the kapok fiber. While retaining the large pore size of the kapok fiber, the cotton fiber played a supporting role, providing a good structural foundation for the entire spunlace blended nonwoven fabric.

[0070] (4) Figure 2 The pore size distribution line graph of the embodiment and the comparative example; the narrower the line, the more concentrated the pore size distribution, the flatter the pore size, and the more evenly the proportion of pores of different sizes. Figure 2 It can be seen that with the increase of kapok content, the overall pore size of the non-woven fabric becomes smaller and smaller, and the proportion of small pores becomes higher and higher. When the kapok content is greater than or equal to 50%, the proportion of pores with a size less than 30 μm is greater than 50%, and when the kapok content is greater than or equal to 70%, the proportion of pores with a size less than 30 μm is greater than 65%. Combined with the above test results (air permeability and oil absorption and retention rate), it can be seen that Example 3 has the best effect and has great application potential in the field of oil-absorbing facial tissue.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a spunlace blended nonwoven fabric, comprising the following steps: The cotton fibers are first combed to obtain a cotton fiber web; The kapok fibers are subjected to a second combing to obtain a kapok fiber web; The cotton fiber web is wrapped on the outer surface of the kapok fiber web to obtain a mixed fiber web; The mixed fiber web is subjected to a third carding to obtain a kapok-cotton composite fiber web; The kapok-cotton composite fiber web is subjected to hydroentanglement to obtain a hydroentangled blended nonwoven fabric.

2. The preparation method according to claim 1, characterized in that: The mass ratio of the kapok fiber to the cotton fiber is 3-9:1-7.

3. The preparation method according to claim 1, characterized in that: The method for wrapping the cotton fiber web on the outer surface of the kapok fiber web comprises: laying the kapok fiber web on the cotton fiber web, and folding the composite of the kapok fiber web and the cotton fiber web in half, so that the kapok fiber web is wrapped inside the cotton fiber web.

4. The preparation method according to claim 1, characterized in that: The cotton fiber is raw cotton fiber that has not been chemically treated; and the kapok fiber is raw kapok fiber that has not been chemically treated.

5. The preparation method according to claim 1, characterized in that: The pressure of the water jet is 4-6 MPa.

6. The preparation method according to claim 1 or 5, characterized in that: The water jets are multiple water jets; the pressure of the last water jet is higher than the pressure of the previous water jet.

7. The preparation method according to claim 6, characterized in that: The water jets are three-pass water jets; the pressures of the three-pass water jets are 4 MPa, 5 MPa and 6 MPa respectively.

8. The preparation method according to claim 1, characterized in that: The hydroentanglement step further includes drying; the drying temperature is 70-80°C.

9. The spunlace blended nonwoven fabric prepared by the preparation method according to any one of claims 1 to 8.

10. Use of the spunlace blended nonwoven fabric according to claim 9 in oil-absorbing facial tissue.

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