Flash spunlace sheet

Abstract

The invention relates to a flash-evaporation spunlace sheet, the raw material of the flash-evaporation spunlace sheet comprises polyethylene, and the gram weight of the flash-evaporation spunlace sheet is more than 35 g / m < 2 >; the unit gram weight flexibility of the flashed spunlace sheet is 140-300 (N.m < 2 >) / g; the contact angle of the flashing spunlace sheet is 120-150 degrees; the porosity of the flash spunlace sheet is 50%-90%; and the emissivity of the flash spunlace sheet is 30-45%. The thin sheet provided by the invention has good hydrophobicity and relatively large porosity.

Description

Technical Field

[0001] The present invention relates to the technical field of textile production, and specifically, it is a flash spun hydroentangled nonwoven sheet. Background Art

[0002] For flash spun nonwoven materials, there are technical problems of relatively large pores but poor hydrophobicity. Based on the development of flash spun nonwoven fabrics, the company has developed flash spun hydroentangled nonwoven sheets. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a flash spun hydroentangled nonwoven sheet.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A flash spun hydroentangled nonwoven sheet, characterized in that the raw material of the flash spun hydroentangled nonwoven sheet contains polyethylene, and the grammage of the flash spun hydroentangled nonwoven sheet is more than 35 g / m 2 2;

[0006] The gram-force softness and bursting strength of the flash spun hydroentangled nonwoven sheet is 140 - 300 (N·m 2 ) / g;

[0007] Gram-force softness and bursting strength = (softness * bursting strength) / grammage;

[0008] The test standard for softness is the test standard of GB / T 39371-2020 Leather - Physical and Mechanical Tests - Determination of Softness;

[0009] The test standard for bursting strength is the steel ball method of GB / T 19976-2005 Textiles - Determination of Bursting Strength;

[0010] The test standard for grammage is GB / T 24218.1-2009 Textiles - Test Methods for Nonwovens - Part 1: Determination of Mass per Unit Area.

[0011] The gram-force softness and bursting strength of the flash spun hydroentangled nonwoven sheet is 140 - 170 (N·m 2 ) / g.

[0012] The gram-force softness and bursting strength of the flash spun hydroentangled nonwoven sheet is 170 - 200 (N·m 2 ) / g.

[0013] The gram-force softness and bursting strength of the flash spun hydroentangled nonwoven sheet is 200 - 230 (N·m 2 ) / g.

[0014] The gram-force softness and bursting strength of the flash spun hydroentangled nonwoven sheet is 230 - 260 (N·m 2 ) / g.

[0015] The gram weight soft breaking strength of the flash spun hydroentangled nonwoven sheet is 260 - 300 (N·m 2 ) / g.

[0016] The contact angle of the flash spun hydroentangled nonwoven sheet is 120 - 150°;

[0017] The contact angle is tested by a contact angle measuring instrument.

[0018] The contact angle of the flash spun hydroentangled nonwoven sheet is between 130 - 135°.

[0019] The contact angle of the flash spun hydroentangled nonwoven sheet is between 135 - 140°.

[0020] The contact angle of the flash spun hydroentangled nonwoven sheet is between 140 - 145°.

[0021] The contact angle of the flash spun hydroentangled nonwoven sheet is between 145 - 150°.

[0022] The porosity of the flash spun hydroentangled nonwoven sheet is 50% - 90%;

[0023] The porosity is calculated according to the areal density and thickness of the hydroentangled nonwoven material.

[0024] The porosity of the flash spun hydroentangled nonwoven sheet is 75% - 80%.

[0025] The porosity of the flash spun hydroentangled nonwoven sheet is 80% - 85%.

[0026] The porosity of the flash spun hydroentangled nonwoven sheet is 85% - 90%.

[0027] The emissivity of the flash spun hydroentangled nonwoven sheet is 30 - 45%;

[0028] The emissivity is tested by using a Fourier transform infrared spectrometer with an integrating sphere accessory for the flash spun hydroentangled nonwoven sheet.

[0029] The emissivity of the flash spun hydroentangled nonwoven sheet is 30 - 35%.

[0030] The emissivity of the flash spun hydroentangled nonwoven sheet is 35 - 40%.

[0031] The emissivity of the flash spun hydroentangled nonwoven sheet is 40 - 45%.

[0032] A preparation method of a flash spun hydroentangled nonwoven sheet, the specific steps are as follows,

[0033] First, obtain flash spun fibers by the flash spinning method, and obtain a flash spun felt through a cross-laying process; wherein: the raw material of the flash spun fibers is polyethylene, and the temperature of the flash spinning is 200 - 230°C;

[0034] Secondly, the flash nonwoven fabric is unrolled through an unwinding device, and then passes through multiple cylinder screens. Multiple hydroentangling nozzles are respectively arranged on the cylinder screens for hydroentangling treatment to obtain an intermediate fabric;

[0035] Finally, the intermediate fabric is dried and then wound up to obtain a flash hydroentangled thin sheet;

[0036] The hydroentangling pressure is 50-120 bar.

[0037] Compared with the prior art, the positive effect of the present invention is:

[0038] As the hydroentangling pressure gradually increases, the thickness of the sample gradually decreases, and the porosity also gradually decreases accordingly.

[0039] The hydroentangled nonwoven material has a high emissivity within the atmospheric transparent window, that is, it can better dissipate heat to the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0041] In the figure: hydroentangling nozzle 1, cylinder screen 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following provides a detailed embodiment of a flash hydroentangled thin sheet of the present invention.

[0043] Example 1

[0044] A preparation method of a flash hydroentangled thin sheet, the specific steps are as follows,

[0045] First, flash fibers are obtained by a flash method and a flash nonwoven fabric is obtained through a web-forming process; wherein: the raw material of the flash fibers is polyethylene, and the temperature of flash spinning is 200-230 °C;

[0046] Secondly, the flash nonwoven fabric is unrolled through an unwinding device, and then passes through multiple cylinder screens 2. Multiple hydroentangling nozzles 1 are respectively arranged on the cylinder screens 2 for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 50 bar.

[0047] Finally, the intermediate fabric is dried and then wound up to obtain a flash hydroentangled thin sheet.

[0048] Example 2

[0049] A preparation method of a flash hydroentangled thin sheet, the specific steps are as follows,

[0050] First, flash fibers are obtained by a flash method and a flash nonwoven fabric is obtained through a web-forming process; wherein: the raw material of the flash fibers is polyethylene, and the temperature of flash spinning is 200-230 °C;

[0051] Secondly, unwind the flash-off felt through the unwinding device, and then pass it through multiple cylinder screens 2, on which multiple hydroentangling nozzles 1 are respectively arranged for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 70 bar.

[0052] Finally, dry the intermediate fabric and then wind it up to obtain the flash-off hydroentangled thin sheet;

[0053] Example 3

[0054] A method for preparing a flash-off hydroentangled thin sheet, the specific steps of which are as follows.

[0055] Firstly, obtain flash-off fibers by the flash-off method and then obtain a flash-off felt through the cross-laying process; wherein: the raw material of the flash-off fibers is polyethylene, and the temperature of the flash-off spinning is 200 - 230 °C;

[0056] Secondly, unwind the flash-off felt through the unwinding device, and then pass it through multiple cylinder screens 2, on which multiple hydroentangling nozzles 1 are respectively arranged for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 90 bar.

[0057] Finally, dry the intermediate fabric and then wind it up to obtain the flash-off hydroentangled thin sheet;

[0058] Example 4

[0059] A method for preparing a flash-off hydroentangled thin sheet, the specific steps of which are as follows.

[0060] Firstly, obtain flash-off fibers by the flash-off method and then obtain a flash-off felt through the cross-laying process; wherein: the raw material of the flash-off fibers is polyethylene, and the temperature of the flash-off spinning is 200 - 230 °C;

[0061] Secondly, unwind the flash-off felt through the unwinding device, and then pass it through multiple cylinder screens 2, on which multiple hydroentangling nozzles 1 are respectively arranged for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 120 bar.

[0062] Finally, dry the intermediate fabric and then wind it up to obtain the flash-off hydroentangled thin sheet;

[0063] Comparative Example 1

[0064] A method for preparing a flash-off hydroentangled thin sheet, the specific steps of which are as follows.

[0065] Firstly, obtain flash-off fibers by the flash-off method and then obtain a flash-off felt through the cross-laying process; wherein: the raw material of the flash-off fibers is polyethylene, and the temperature of the flash-off spinning is 200 - 230 °C;

[0066] Secondly, unwind the flash spun fabric through an unwinding device, then pass it through multiple cylinder screens 2, and multiple hydroentangling nozzles 1 are respectively arranged on the cylinder screens 2 for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 30 bar.

[0067] Finally, dry the intermediate fabric and then wind it up to obtain the flash spun hydroentangled nonwoven fabric.

[0068] Comparative Example 2

[0069] A method for preparing a flash spun hydroentangled nonwoven fabric, the specific steps are as follows.

[0070] First, obtain flash spun fibers by the flash spinning method and obtain a flash spun fabric through a web forming process; wherein: the raw material of the flash spun fibers is polyethylene, and the temperature of flash spinning is 200 - 230 °C.

[0071] Secondly, unwind the flash spun fabric through an unwinding device, then pass it through multiple cylinder screens 2, and multiple hydroentangling nozzles 1 are respectively arranged on the cylinder screens 2 for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 40 bar.

[0072] Finally, dry the intermediate fabric and then wind it up to obtain the flash spun hydroentangled nonwoven fabric.

[0073] Comparative Example 3

[0074] A method for preparing a flash spun hydroentangled nonwoven fabric, the specific steps are as follows.

[0075] First, obtain flash spun fibers by the flash spinning method and obtain a flash spun fabric through a web forming process; wherein: the raw material of the flash spun fibers is polyethylene, and the temperature of flash spinning is 200 - 230 °C.

[0076] Secondly, unwind the flash spun fabric through an unwinding device, then pass it through multiple cylinder screens 2, and multiple hydroentangling nozzles 1 are respectively arranged on the cylinder screens 2 for hydroentangling treatment to obtain an intermediate fabric; wherein, the hydroentangling pressure is 140 bar.

[0077] Finally, dry the intermediate fabric and then wind it up to obtain the flash spun hydroentangled nonwoven fabric.

[0078] Table 1 Test data table of the present application

[0079]

[0080] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A flash spunlace sheet, characterized in that: The raw material of the flash spunlace sheet includes polyethylene, and the weight of the flash spunlace sheet is 35g / m 2 above, The unit weight breaking strength of flash spunlace sheet is 140~300(N·m 2 ) / g; Unit weight softness = (softness * bursting strength) / gram weight; The test standard for softness is GB / T 39371-2020 Test standard for determination of softness of leather by physical and mechanical experiments; The test standard for bursting strength is GB / T 19976-2005 Determination of bursting strength of textiles - Steel ball method; The test standard for gram weight is GB / T 24218.1-2009 Textiles - Test methods for nonwoven fabrics - Part 1: Determination of mass per unit area.

2. A flash spunlace sheet according to claim 1, characterized in that: The unit weight breaking strength of flash spunlace sheet is 170~200(N·m 2 ) / g.

3. The flash spunlace sheet according to claim 1, characterized in that: The unit weight softness of the flash spunlace sheet is 200-230 (N·m 2 ) / g.

4. The flash spunlace sheet according to claim 1, characterized in that: The unit weight softness of the flash spunlace sheet is 230-260 (N·m 2 ) / g.

5. The flash spunlace sheet according to claim 1, characterized in that: The contact angle of the flash spunlace sheet is 120-150°; The contact angle is tested by a contact angle meter.

6. A flash spunlace sheet according to claim 5, characterized in that: The contact angle of the flash spunlace sheet is between 130 and 135°.

7. The flash spunlace sheet according to claim 5, characterized in that: The contact angle of the flash spunlace sheet is between 135 and 140°.

8. The flash spunlace sheet according to claim 5, characterized in that: The contact angle of the flash spunlace sheet is between 140 and 145°.

9. The flash spunlace sheet according to claim 1, characterized in that: The porosity of flash spunlace sheets is 50% to 90%; The porosity is calculated from the area density and thickness of the hydroentangled nonwoven material.

10. The flash spunlace sheet according to claim 9, characterized in that: The porosity of the flash spunlace sheet is 80% to 85%.

11. The flash spunlace sheet according to claim 9, characterized in that: The porosity of the flash spunlace sheet is 85% to 90%.

12. The flash spunlace sheet according to claim 1, characterized in that: The emissivity of the flash spunlace sheet is 30-45%; The emissivity of spunlace nonwoven materials was tested using a Fourier transform infrared spectrometer with an integrating sphere accessory.

13. The flash spunlace sheet according to claim 12, characterized in that: The emissivity of the flash spunlace sheet is 35-40%.

14. The flash spunlace sheet according to claim 12, characterized in that: The emissivity of the flash spunlace sheet is 40-45%.

15. The method for preparing a flash spunlace sheet according to claim 1, characterized in that: First, the flash-steamed fiber obtained by the flash-steaming method is subjected to a web laying process to obtain a flash-steamed felt cloth; wherein: the raw material of the flash-steamed fiber is polyethylene, and the temperature of the flash-spinning is 200-230°C; Secondly, the flash-steamed felt fabric is unwound by an unwinding device, and then passes through multiple cylinders, where multiple spunlacing heads are respectively arranged to perform spunlacing treatment to obtain an intermediate fabric; Finally, the intermediate fabric is dried and then rolled up to obtain a flash spunlace sheet; The water jet pressure is 50-120 bar.

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