Quantitative elastic non-woven fabric

Abstract

The utility model discloses a quantitative elastic non-woven fabric. According to the scheme, the composite material comprises a low-elasticity spunbond layer and a high-elasticity spunbond layer which are manufactured through a spunbond process, and the high-elasticity spunbond layer and the low-elasticity spunbond layer are compounded through hot rolling; pOE (Polyolefin Elastomer) is added into raw materials of the high-elasticity spunbond layer and the low-elasticity spunbond layer, and the ratio of the addition amount is (1.5-3): 1. The quantitative elastic non-woven fabric has a transverse quantitative elastic effect, and meanwhile, the quantitative elastic non-woven fabric is softer in touch feeling, higher in draping degree and higher in comfort degree.

Description

Technical Field

[0001] The present invention relates to the technical field of elastic nonwoven fabrics, and in particular to a quantitative elastic nonwoven fabric. Background Art

[0002] In recent years, with the improvement of people's living standards, awareness of protection, and demand for protection, elastic nonwovens have seen strong development momentum. Along with the rapid growth in production and demand, people are placing higher demands on product comfort and functionality. This is particularly true in the beauty care (facial masks) and daily necessities (disposable underwear, pull-up pants) sectors.

[0003] In the prior art, ordinary non-woven fabrics have no elasticity and are generally formed by combining them with elastic films. However, the non-woven fabrics with elastic films have poor air permeability and unsatisfactory use effects.

[0004] The mask fits the edge of the face with the help of a suture-removable structure. Each time it is stretched, for example, after stretching it with twice the force, it will shrink back by half (high elasticity) or almost be unable to rebound or extend to other angles (low elasticity). Although the length after shrinking is longer than the original length due to high elasticity, the stretching effect will be worse when you want to stretch it to the ideal position for the second time.

[0005] Therefore, a non-woven fabric is needed that can achieve a quantitative elastic effect and fit the skin better. Summary of the Invention

[0006] In order to solve the above problems, this solution provides a quantitative elastic non-woven fabric.

[0007] To achieve the above object, the technical solution adopted in this scheme is: a quantitative elastic non-woven fabric, comprising a low-elasticity spunbond layer and a high-elasticity spunbond layer made by a spunbond process, wherein the high-elasticity spunbond layer and the low-elasticity spunbond layer are hot-rolled and laminated;

[0008] POE is added to the raw materials of the high-elasticity spunbond layer and the low-elasticity spunbond layer, and the added ratio is 1.5 to 3:1.

[0009] Furthermore, the ratio of the amount of POE added to the high-elasticity spunbond layer raw material to the amount of POE added to the low-elasticity spunbond layer raw material is 1.5:1.

[0010] Furthermore, the POE addition ratio in the low-elasticity spunbond layer is 30% to 52%;

[0011] The POE addition ratio in the high elasticity spunbond layer is 78% to 90%.

[0012] Furthermore, the POE addition ratio in the low elasticity spunbond layer is 52%;

[0013] The POE addition ratio in the high elasticity spunbond layer is 78%.

[0014] Furthermore, PP and cool masterbatch are added to the low elasticity spunbond layer, wherein

[0015] PP addition accounts for 45% to 61%;

[0016] The proportion of cooling masterbatch added is 3% to 9%.

[0017] Furthermore, in the low-elasticity spunbond layer,

[0018] PP accounts for 45%;

[0019] The cooling masterbatch accounts for 3%.

[0020] Furthermore, PP, LLDPE and 1# are added to the high elasticity spunbond layer, wherein

[0021] PP: 1% to 10%;

[0022] LLDPE: 6% to 11%;

[0023] 1#: 1%~3%.

[0024] Furthermore, in the high elasticity spunbond layer,

[0025] PP: 9%;

[0026] The LLDPE: 10%;

[0027] Said 1#: 3%.

[0028] Furthermore, the low-elasticity spunbond layer and the high-elasticity spunbond layer are laid in the following manner: low-elasticity spunbond layer, high-elasticity spunbond layer, low-elasticity spunbond layer, or high-elasticity spunbond layer, low-elasticity spunbond layer, high-elasticity spunbond layer.

[0029] In summary, this solution has the following advantages:

[0030] The quantitative elastic non-woven fabric provided by this solution has a quantitative elastic effect in the transverse direction. At the same time, it is softer to the touch, has a higher drape, and is more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a process flow chart for producing quantitative elastic nonwoven fabrics;

[0032] Figure 2 is a schematic diagram of a quantitative elastic nonwoven fabric;

[0033] Figure 3 Schematic diagram of a quantitative elastic nonwoven fabric in another embodiment.

[0034] Among them, 1. quantitative elastic non-woven fabric; 11. low elastic spunbond layer; 12. high elastic spunbond layer 2. screw; 3. metering pump; 4. spinning box; 5. air flow stretching device; 6. mesh curtain; 7. low speed traction roller; 8. high speed traction roller; 9. drying device. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0036] Example 1:

[0037] A quantitative elastic nonwoven fabric, such as Figure 2 As shown, it includes a low-elasticity spunbond layer 11 and a high-elasticity spunbond layer 12. The specific production steps are as follows:

[0038] S1, making a low-elasticity spunbond layer 11 and a high-elasticity spunbond layer 12

[0039] In the step of preparing the low-elasticity spunbond layer 11, raw materials are prepared, including blending according to a mass ratio:

[0040] PP: 45% to 61%;

[0041] POE: 30% to 52%;

[0042] Cooling masterbatch: 3% to 9%;

[0043] In this embodiment, the PP (polypropylene) is added at 45% when making the low-elasticity spunbond layer 11 and is purchased directly from Sinopec, with the model number being PPH-Y40.

[0044] The POE (polyolefin elastomer) is a thermoplastic elastomer with a narrow relative molecular weight distribution and a uniform short chain branch distribution. POE has good flexibility and puncture resistance, high elongation and high elasticity. In this embodiment, when making the low-elasticity spunbond layer 11, POE is added at 52%, which is purchased directly from ExxonMobil and is model 7050FL.

[0045] The cooling masterbatch is pre-mixed with a xylitol cooling finish agent, imparting a cooling feel to the final product. In this embodiment, 3% of the cooling masterbatch is added to the low-elasticity spunbond layer 11. The xylitol cooling finish agent, model JINC-L 102, was purchased directly from Wujiang Jincheng Fine Chemical Co., Ltd.

[0046] The prepared raw materials are conveyed and preheated in the feeding section of screw 2, then compacted, degassed and gradually melted in the compression section of screw 2, and further mixed and plasticized in the metering section of screw 2. The temperature of screw 2 is 180-150°C, and the metering pump 3 with a speed specification of 250CC conveys the raw materials to the spinning box 4 at a spinneret speed of 10-40rpm.

[0047] The spinning box 4 has a temperature of 210°C. An airflow stretching device 5 is installed at the bottom of the spinning box 4. The fibers ejected from the spinneret pass through the airflow stretching device 5 at the bottom, where they are first rapidly cooled in cooling air and then stretched in traction air. The stretched fibers then enter the mesh curtain 6, forming a randomly curled, low-elasticity spunbond layer 11. The spunbond process is well-known to those skilled in the art and will not be described in detail here.

[0048] In the step of preparing the high elastic spunbond layer 12, the raw materials prepared include blending according to a mass ratio:

[0049] PP: 1% to 10%;

[0050] POE: 78%-90%;

[0051] LLDPE: 6% to 11%;

[0052] 1#: 1% to 3%;

[0053] In this embodiment, when making the high elasticity spunbond layer 12, PP is added by 9% and POE is added by 78%;

[0054] The ratio of the amount of POE added to the raw material of the high-elasticity spunbond layer 12 to the amount of POE added to the raw material of the low-elasticity spunbond layer 11 is 1.5 to 3:1. In this embodiment, the ratio of the amount of POE added to the raw material of the high-elasticity spunbond layer 12 to the amount of POE added to the raw material of the low-elasticity spunbond layer 11 is 1.5:1;

[0055] The LLDPE (linear low-density polyethylene) has a high softening temperature and melting temperature, and has the advantages of high strength, good toughness, high rigidity, good heat resistance and cold resistance, and has good resistance to environmental stress cracking, impact strength and tear strength. In this embodiment, when making the high-elasticity spunbond layer 12, LLDPE is added by 10%, which is purchased directly from Dow Group of the United States and is model 1648B.

[0056] Said 1# is a softener, which can change the static and dynamic coefficients of friction of the fiber. When the static coefficient of friction is changed, the touch feels smoother, making it easier to move across the fiber or fabric. When the dynamic coefficient of friction is changed, the microstructure between fibers moves more easily, making the fibers or fabric more deformable. The combined effect of these two factors is softness. In this embodiment, 1# was added at 3% to produce the high-elasticity spunbond layer 12. It was purchased directly from Guangdong Baole Nonwoven Fabric Co., Ltd.

[0057] In this step, the manufacturing process and raw material procurement manufacturer of the high elasticity spunbond layer 12 are the same as those of the low elasticity spunbond layer 11 , and the high elasticity spunbond layer 12 is formed on the mesh curtain 6 by spunbonding technology.

[0058] S2, spunbond layer composite

[0059] Three production lines are set up to carry out spunbond process simultaneously, and the elastic spunbond layers produced are laid on the mesh curtain 6 in sequence, and the low elastic spunbond layer 11, the high elastic spunbond layer 12, and the low elastic spunbond layer 11 are laid on the mesh curtain 6 in sequence.

[0060] The mesh curtain 6 is first passed through a low-speed traction roller 7 for hot rolling bonding to form a composite non-woven fabric with elasticity;

[0061] The composite nonwoven fabric then passes through the high-speed traction roller 8. The speed difference between the low-speed traction roller 7 and the high-speed traction roller 8 stretches the composite nonwoven fabric in the radial direction, causing it to shrink in the weft direction during the stretching process. A drying device 9 is installed outside the low-speed traction roller 7 and the high-speed traction roller 8. The high-speed traction roller 8 stretches the nonwoven fabric at a high temperature, accelerating the melt condensation of the nonwoven fabric, and giving the composite nonwoven fabric a quantitative elastic effect.

[0062] Melt polycondensation technology is a polymerization reaction carried out at a relatively high reaction temperature. Non-woven fabrics use melt polycondensation technology to improve product quality and prevent the occurrence of side reactions. Melt polycondensation technology is an existing technology and is adapted to the needs of large-scale industrial production.

[0063] The temperature in the drying device 9 is 80°C to 150°C, and the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 2 to 8 r / min. In this embodiment, the drying temperature is 120°C, the speed of the low-speed pulling roller 7 is 14 r / min, and the speed of the high-speed pulling roller 8 is 19 r / min.

[0064] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 5 r / min.

[0065] The non-woven fabric is compounded with the low elasticity spunbond layer 11, the high elasticity spunbond layer 12 and the low elasticity spunbond layer 11 through this step, and has a quantitative elastic effect through high temperature melt polycondensation.

[0066] S3, cooling and shaping

[0067] The composite layer obtained in S2 enters the cooling area to be cooled to room temperature after leaving the high-speed traction roller 8. Preferably, a cooling device is provided in the cooling area for cooling.

[0068] After cooling, the quantitative elastic nonwoven fabric 1 is shaped.

[0069] S4, Rewinding

[0070] The formed quantitative elastic non-woven fabric 1 is rolled up for later use.

[0071] Example 2

[0072] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0073] The difference between this embodiment and embodiment 1 is that when making the low elasticity spunbond layer 11, POE is added by 32%; when making the high elasticity spunbond layer 12, POE is added by 80%;

[0074] The ratio of the amount of POE added to the raw material of the high-elasticity spunbond layer 12 to the amount of POE added to the raw material of the low-elasticity spunbond layer 11 is 2.5:1.

[0075] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0076] Example 3

[0077] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0078] The difference between this embodiment and embodiment 1 is that when making the low elasticity spunbond layer 11, POE is added by 30%; when making the high elasticity spunbond layer 12, POE is added by 90%;

[0079] The ratio of the amount of POE added to the raw material of the high-elasticity spunbond layer 12 to the amount of POE added to the raw material of the low-elasticity spunbond layer 11 is 3:1.

[0080] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0081] Example 4

[0082] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0083] The difference between this embodiment and embodiment 1 is that, Figure 1 and Figure 3 The produced elastic spunbond layer is laid on the mesh curtain 6 in sequence, and the mesh curtain 6 is laid with a high elastic spunbond layer 12, a low elastic spunbond layer 11, and a high elastic spunbond layer 12 in sequence.

[0084] In addition, the addition amount of POE in the raw material of the high elastic spunbond layer 12 and the addition amount of POE in the raw material of the low elastic spunbond layer 11 adopt the same ratio of 2.5:1 as in Example 1.

[0085] Example 5

[0086] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0087] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer composite process, the rotation speed of the low-speed traction roller 7 is 14 r / min, and the rotation speed of the high-speed traction roller 8 is 18 r / min;

[0088] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 4 r / min.

[0089] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0090] Example 6

[0091] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0092] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer composite process, the rotation speed of the low-speed traction roller 7 is 15 r / min, and the rotation speed of the high-speed traction roller 8 is 17 r / min;

[0093] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 2 r / min.

[0094] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0095] Example 7

[0096] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0097] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer composite process, the rotation speed of the low-speed traction roller 7 is 14 r / min, and the rotation speed of the high-speed traction roller 8 is 20 r / min;

[0098] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 6 r / min.

[0099] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0100] Example 8

[0101] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0102] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer composite process, the rotation speed of the low-speed traction roller 7 is 14 r / min, and the rotation speed of the high-speed traction roller 8 is 22 r / min;

[0103] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 8 r / min.

[0104] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0105] Example 9

[0106] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0107] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer compounding process, the temperature in the drying device 9 is 80°C.

[0108] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0109] Example 10

[0110] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0111] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer compounding process, the temperature in the drying device 9 is 130°C.

[0112] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0113] Example 11

[0114] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0115] The difference between this embodiment and embodiment 1 is that in step S3, the spunbond layer compounding process, the temperature in the drying device 9 is 150°C.

[0116] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0117] Example 12

[0118] This embodiment provides an application of a quantitative elastic non-woven fabric in making a facial mask. The specific production steps are as follows:

[0119] The difference between this embodiment and embodiment 1 is that 1# is not added when making the high elasticity spunbond layer 12;

[0120] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond layer composite of a low-elasticity spunbond layer 11, a high-elasticity spunbond layer 12, and a low-elasticity spunbond layer 11, which has a quantitative elastic effect through high-temperature melt polycondensation.

[0121] In order to verify the preparation method and material properties of this solution, performance tests were conducted on the twelve implemented products, and the test contents were CD (weft direction) elastic recovery rate and drape.

[0122] The specific test methods, test standards and test instruments are as follows:

[0123] 1. Elastic recovery rate

[0124] Test method:

[0125] S1. Sampling

[0126] Take a quantitative elastic fabric with a length of 50 mm and a width of 25 mm;

[0127] S2. Fix the sample

[0128] In this experiment, a cut test sample is first fixed to the fixture. When fixing the sample, fix the upper end first, let the sample droop naturally, and then fix the lower end fixture. Avoid stretching the sample during the fixing process to ensure that the sample remains vertical and flat.

[0129] The clamps are spaced 50 mm apart. Observe the strength value using the strength test software to ensure that the strength reading is 0.

[0130] S3, tensile test

[0131] Set the control scheme to CD5N constant force stretching and the stretching speed to 100mm / min;

[0132] During the test, when the tension is removed, the non-woven fabric shrinks, where is the test length, is the stretched length, is the recovery length, and is the tensile deformation length.

[0133]

[0134] Test standard: elastic recovery rate is 14.5% ± 0.3%.

[0135] Testing instrument: Nonwoven material constant temperature mechanical properties analyzer (HD026S model, Nantong Hongda Experimental Instrument Co., Ltd., China).

[0136] The final test results are shown in the table:

[0137] Test length L0 (mm) Stretching length L1(mm) Recovery length L3((mm) Tensile deformation length L4 (mm) Elastic recovery rate (%) Example 1 50 50 7.25 92.75 14.5 Example 2 50 50 7.109 92.891 14.218 Example 3 50 50 7.394 92.606 14.788 Example 4 50 50 7.247 92.753 14.49 Example 5 50 50 7.2 92.8 14.4 Example 6 50 50 7.191 92.809 14.382 Example 7 50 50 7.347 92.653 14.694 Example 8 50 50 7.29 92.71 14.58 Example 9 50 50 7.146 92.854 14.292 Example 10 50 50 7.319 92.681 14.63 Example 11 50 50 7.155 92.845 14.31 Example 12 50 50 7.113 92.887 14.226

[0138] In the process test, based on the elasticity test, the CD elastic recovery rate of the quantitative elastic non-woven fabric 1 fluctuated within the range of 14.5%±0.3%.

[0139] In process testing, based on the test of different POE addition ratios in the raw materials of the high-elasticity spunbond layer 12 and the low-elasticity spunbond layer 11, referring to the figure below, combined with Examples 1, 2, and 3, when the POE addition ratio in the raw materials of the high-elasticity spunbond layer 12 and the low-elasticity spunbond layer 11 is within the range of 1.5 to 3:1, the CD elastic recovery rate of the quantitative elastic non-woven fabric 1 is 14.5% ± 0.3%. At the same time, it is concluded that as the difference in the POE addition ratio in the raw materials of the high-elasticity spunbond layer 12 and the low-elasticity spunbond layer 11 increases, the CD elastic recovery rate of the quantitative elastic non-woven fabric 1 decreases. Preferably, when the POE addition ratio in the raw materials of the high-elasticity spunbond layer 12 and the low-elasticity spunbond layer 11 is 1.5:1, the CD elastic recovery rate of the quantitative elastic non-woven fabric 1 is 14.5%.

[0140]

[0141] In the process test, the low-elasticity spunbond layer 11 and the high-elasticity spunbond layer 12 obtained by the same method were compounded in different orders. In Example 1, the three spunbond layers of low-elasticity spunbond layer 11, high-elasticity spunbond layer 12, and low-elasticity spunbond layer 11 were compounded, and the elastic recovery rate was 14.5%; in Example 4, the three spunbond layers of high-elasticity spunbond layer 12, low-elasticity spunbond layer 11, and high-elasticity spunbond layer 12 were compounded, and the elastic recovery rate was 14.498%. The elastic recovery rates of the two examples are very close, which shows that the different orders of compounding the low-elasticity spunbond layer 11 and the high-elasticity spunbond layer 12 have little effect on the test results of the elastic recovery rate. In this solution, the order of compounding is preferred, and the arrangement of the three spunbond layers of low-elasticity spunbond layer 11, high-elasticity spunbond layer 12, and low-elasticity spunbond layer 11 is used.

[0142]

[0143] In the process test, based on the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8, referring to the figure and embodiment 1 and embodiments 5 to 8, when the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is in the range of 2 to 8 r / min, the prepared quantitative elastic non-woven fabric 1 meets the requirements of this scheme, when the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is greater than 5 r / min, the elastic recovery rate of the quantitative elastic non-woven fabric 1 is greater than 14.5%, when the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is greater than 6 r / min, the tension applied to the quantitative elastic non-woven fabric 1 is too large, and the elastic recovery rate gradually decreases. The speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is preferably 5 r / min.

[0144]

[0145] In process testing, based on the quantitative elastic non-woven fabric 1 produced at different temperatures within the drying device 9, referring to the line graph below and Examples 1 and 9-11, when the temperature within the drying device 9 was between 80°C and 150°C, the quantitative elastic non-woven fabric 1 produced met the requirements of this solution. Other conditions remained unchanged. When the temperature was <120°C, the elastic recovery rate of the quantitative elastic non-woven fabric 1 decreased, while when the temperature was >120°C, the elastic recovery rate of the quantitative elastic non-woven fabric 1 increased. However, when the temperature exceeded 130°C, the quantitative elastic non-woven fabric 1 was exposed to excessive temperatures, and the elastic recovery rate gradually decreased. Therefore, the preferred temperature of the drying device 9 was 120°C, at which the elastic recovery rate of the quantitative elastic non-woven fabric 1 was 14.5%.

[0146]

[0147] In the process test, a comparison was made based on the presence or absence of the quantitative elastic non-woven fabric 1 with 1# added. Referring to Example 1 and Example 12, when other conditions were the same, the elastic recovery rate of Example 1 with 1# was 14.5%, and the elastic recovery rate of Example 12 without 1# was 14.226%, so it is preferred to add 1#.

[0148] An analysis of the process test and the test results of the examples yielded the following conclusions: the quantitative elastic nonwoven fabric 1 prepared in the present application fully utilizes the elasticity standard that meets the quantitative elasticity.

[0149] 2. Droop

[0150] S1. Sampling

[0151] Take a quantitative elastic fabric with a long diameter of 24 mm;

[0152] S2. Fix the sample

[0153] In this experiment, a cut circular test sample is first fixed to the instrument clamping plate with a diameter of 12 mm.

[0154] S3. Test drape coefficient

[0155] Illuminate with parallel light perpendicular to the horizontal plane to obtain the projection of the test sample. Use image processing to calculate the percentage of the projection area to its original area to obtain the drape coefficient. The calculation formula is:

[0156]

[0157] in

[0158] K0 is the overhang coefficient;

[0159] A D is the horizontal projection area of ​​the test sample;

[0160] A F is the area of ​​the test sample;

[0161] A d is the area of ​​the instrument holding plate.

[0162] Test standard: drape coefficient <35%.

[0163] The smaller the drape coefficient of a fabric, the better its drape. In the prior art, spunbond nonwovens have poorer drape than textiles, resulting in poor skin-friendliness and softness. The quantitative elastic nonwoven fabric 1 provided in this solution has a drape coefficient of less than 35%.

[0164] Testing instrument: Fabric drape tester (Model XDP-1, Shanghai Xinxian Instrument Co., Ltd., China).

[0165] In the process test, based on the drape test, the drape coefficient of the quantitative elastic non-woven fabric 1 fluctuated within the range of 15% to 30%, and the drape coefficient was below 35%, which met the test standard.

[0166] The final test results are shown in the table:

[0167] <![CDATA[A1(mm 2 )]]> <![CDATA[A2(mm 2 )]]> <![CDATA[A3(mm 2 )]]> Drape coefficient (%) Example 1 163.908 113.04 452.16 15 Example 2 197.82 113.04 452.16 25 Example 3 206.298 113.04 452.16 27.5 Example 4 168.9948 113.04 452.16 16.5 Example 5 184.2552 113.04 452.16 21 Example 6 207.9936 113.04 452.16 28 Example 7 180.864 113.04 452.16 20 Example 8 201.2112 113.04 452.16 26 Example 9 214.776 113.04 452.16 30 Example 10 172.386 113.04 452.16 17.5 Example 11 189.342 113.04 452.16 22.5 Example 12 175.7772 113.04 452.16 18.5

[0168] In the process test, based on the test of different POE addition ratios in the raw materials of the high-elasticity spunbond layer 12 and the low-elasticity spunbond layer 11, the rigidity of POE is less than that of PP. Rigidity is one of the important factors affecting drape. The greater the rigidity, the worse the drape.

[0169] Referring to the figure below, combining Example 1, Example 2 and Example 3, the PP addition amount of the quantitative elastic non-woven fabric 1 is compared, and it is found that Example 1 < Example 2 < Example 3;

[0170] Preferably, the ratio of the amount of POE added to the raw materials of the high-elasticity spunbond layer 12 and the low-elasticity spunbond layer 11 is 1.5:1, and the drape coefficient of the quantitative elastic non-woven fabric 1 is 15%.

[0171]

[0172] In process testing, the low-elasticity spunbond layer 11 and the high-elasticity spunbond layer 12, obtained by the same method, were laminated in different orders. In Example 1, a three-layer spunbond layer (low-elasticity spunbond layer 11, high-elasticity spunbond layer 12, and low-elasticity spunbond layer 11) was laminated, resulting in a drape coefficient of 15%. In Example 4, a three-layer spunbond layer (high-elasticity spunbond layer 12, low-elasticity spunbond layer 11, and high-elasticity spunbond layer 12) was laminated, resulting in a drape coefficient of 16.5%. The elastic recovery rates of the two examples were very similar, indicating that the different lamination orders of the low-elasticity spunbond layer 11 and high-elasticity spunbond layer 12 had little effect on the test results of the drape coefficient of the quantitative elastic non-woven fabric 1. In this solution, the lamination order of Example 1 is preferred, with the three-layer spunbond layer (low-elasticity spunbond layer 11, high-elasticity spunbond layer 12, and low-elasticity spunbond layer 11) being laminated.

[0173]

[0174] In the process test, based on different speed differences between the low-speed pulling roller 7 and the high-speed pulling roller 8, referring to the figure and Examples 1 and Examples 5 to 8, when the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is within the range of 2 to 8 r / min, the quantitative elastic non-woven fabric 1 produced meets the requirements of this solution. When the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 5 r / min, the drape coefficient of the quantitative elastic non-woven fabric 1 is 15%, and the drape is optimal. If the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is greater than or less than 5, the drape coefficient of the quantitative elastic non-woven fabric 1 will increase, and the drape will become relatively worse.

[0175]

[0176] In process testing, based on the quantitative elastic nonwoven fabric 1 produced at different drying device 9 temperatures, as shown in the line graph below and in Examples 1 and 9-11, when the drying device 9 temperature was between 80°C and 150°C, the quantitative elastic nonwoven fabric 1 produced met the requirements of this solution. The preferred drying device 9 temperature was 120°C. Other conditions remaining unchanged, when the temperature was above or below 120°C, the drape coefficient of the quantitative elastic nonwoven fabric 1 increased, and the drape property became relatively worse.

[0177]

[0178] In the process test, a comparison was made based on the presence or absence of the quantitative elastic non-woven fabric 1 with 1# added. Referring to Example 1 and Example 12, when other conditions were the same, the drape coefficient of Example 1 with 1# was 15%, and the drape coefficient of Example 12 without 1# was 18.5%, so it was preferred to add 1#.

[0179] An analysis of the process test and example test results yielded the following conclusions: the quantitative elastic non-woven fabric 1 prepared by the spunbond process in this application has a drape coefficient of <35%, has good drape, is more skin-friendly, softer, and more comfortable.

[0180] In summary, the quantitative elastic non-woven fabric 1 provided in the present application has a quantitative elastic effect in the transverse direction, and at the same time, has a softer touch, a higher drape, and a stronger comfort.

[0181] The above embodiments are intended only to illustrate the technical concepts and features of this solution. Their purpose is to enable those familiar with the art to understand the content of this solution and implement it accordingly. They are not intended to limit the scope of protection of this solution. Any equivalent transformations or modifications based on the spirit and essence of this solution shall be included in the scope of protection of this solution.

[0182] In the description of this solution, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components.

[0183] For ordinary technicians in this field, the specific meanings of the above terms in this solution can be understood according to specific circumstances.

[0184] It should be understood that the above-mentioned embodiments are merely exemplary and non-restrictive. Without departing from the basic principles of this solution, various obvious or equivalent modifications or substitutions that can be made by technicians in this field to the above details will be included in the scope of protection of this solution.

Claims

1. A quantitative elastic nonwoven fabric, characterized by: The invention comprises a low-elasticity spunbond layer (11) and a high-elasticity spunbond layer (12) made by a spunbond process, wherein the high-elasticity spunbond layer (12) and the low-elasticity spunbond layer (11) are thermally rolled and composited.

2. The quantitative elastic nonwoven fabric according to claim 1, characterized in that: The low-elasticity spunbond layer (11) and the high-elasticity spunbond layer (12) are laid in the following manner: low-elasticity spunbond layer (11), high-elasticity spunbond layer (12), low-elasticity spunbond layer (11), or high-elasticity spunbond layer (12), low-elasticity spunbond layer (11), high-elasticity spunbond layer (12).

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