Manufacturing method of quantitative elastic non-woven fabric

Abstract

The invention discloses a manufacturing method of quantitative elastic non-woven fabric. The manufacturing method comprises the following steps: S1, manufacturing an elastic spunbond layer from raw materials based on a spunbond process; s2, compounding three spunbond layers based on hot rolling to form an elastic non-woven fabric; s3, after leaving the high-speed traction roller, the composite layer enters a cooling area to be cooled to the room temperature; and S4, rolling is conducted. According to the manufacturing method of the quantitative elastic non-woven fabric, the spunbond layers with different elasticity are manufactured through the spunbond technology and then compounded, and the elastic non-woven fabric is formed; the speed difference is generated between the low-speed traction roller and the high-speed traction roller, so that the elastic non-woven fabric in the high-temperature state is stretched, melt polycondensation of the non-woven fabric is accelerated, the transverse quantitative elastic effect is achieved, and meanwhile, the touch feeling is softer, the draping degree is higher, and the comfort degree is higher.

Description

Technical Field

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

[0002] In recent years, with the improvement of people's living standards, protection awareness and protection requirements, elastic nonwovens have a strong development momentum. While production and demand are growing rapidly, people have put forward higher requirements for product comfort and functionality. Especially in the fields of beauty care (facial masks) and daily necessities (disposable underwear, pull-up pants).

[0003] In the prior art, ordinary non-woven fabrics have no elasticity and are generally formed into elastic non-woven fabrics 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-free structure. Each time it is stretched, for example, after being stretched with twice the force, it will shrink back by half (high elasticity) or will hardly be able to rebound or extend to other angles (low elasticity). Although the high elasticity makes the length after shrinking longer than the original length, 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 proposal provides a method for manufacturing a quantitative elastic nonwoven fabric.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted in this scheme is: to provide a method for manufacturing a quantitative elastic non-woven fabric, the manufacturing steps comprising:

[0008] S1. Prepare raw materials to make an elastic spunbond layer based on a spunbond process, including a low-elastic spunbond layer and a high-elastic spunbond layer; the ratio of POE added to the raw materials of the high-elastic spunbond layer and the low-elastic spunbond layer is 1.5 to 3:1;

[0010] S2, forming an elastic non-woven fabric based on a hot-rolled composite three-layer spunbond layer, wherein the upper and lower layers of the elastic non-woven fabric have the same elasticity, wherein the spunbond layer is firstly hot-rolled and bonded by a low-speed traction roller, and then stretched by a high-speed traction roller, and a drying device is arranged outside the low-speed traction roller and the high-speed traction roller, the temperature in the drying device is 80°C to 150°C, and the speed difference between the low-speed traction roller and the high-speed traction roller is 2 to 8 r / min;

[0011] S3, after leaving the high-speed traction roller, the composite layer enters the cooling area and is cooled to room temperature;

[0012] S4, roll up.

[0013] Further,

[0014] S1. Three production lines are set up to carry out spunbond process at the same time. The elastic spunbond layers produced are laid on the mesh curtain, which are low-elastic spunbond layer, high-elastic spunbond layer, low-elastic spunbond layer, or high-elastic spunbond layer, low-elastic spunbond layer, high-elastic spunbond layer.

[0015] Furthermore, the raw materials for preparing the low-elasticity spunbond layer include:

[0016] PP: 45%~61%;

[0017] POE: 30%~52%;

[0018] Cooling masterbatch: 3%~9%.

[0019] Furthermore, the raw materials for preparing the low-elasticity spunbond layer include:

[0020] The PP is added by 45%;

[0021] The POE is added by 52%;

[0022] The cooling masterbatch is added at 3%.

[0023] Furthermore, the raw materials for preparing the high elastic spunbond layer include:

[0024] PP: 1%~10%;

[0025] POE: 78%~90%;

[0026] LLDPE: 6%~11%;

[0027] 1#: 1%~3%.

[0028] Furthermore, the raw materials for preparing the high elastic spunbond layer include:

[0029] PP: 9%;

[0030] POE: 78%;

[0031] The LLDPE: 10%;

[0032] Said 1#: 3%.

[0033] Furthermore, the ratio of the amount of POE added in the high elastic spunbond layer raw material to the amount of POE added in the low elastic spunbond layer raw material is 1.5:1

[0034] Furthermore, the temperature in the drying device is 120°C.

[0035] Furthermore, the speed difference between the low-speed traction roller and the high-speed traction roller is 5 r / min.

[0036] In summary, this solution has the following advantages:

[0037] The method for manufacturing a quantitative elastic non-woven fabric provided in the present invention is to form an elastic non-woven fabric by compounding spunbond layers of different elasticities through a spunbond process; a speed difference is generated between a low-speed traction roller and a high-speed traction roller, so that the elastic non-woven fabric under a high temperature state is stretched, and the non-woven fabric accelerates the melting and polycondensation, and has a lateral quantitative elastic effect. At the same time, the touch is softer, the drape is higher, and the comfort is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a process flow chart of quantitative elastic nonwoven fabric;

[0039] Figure 2 is a schematic diagram of a quantitative elastic nonwoven fabric;

[0040] Figure 3 is a schematic diagram of a quantitative elastic nonwoven fabric in another embodiment;

[0041] Figure 4 is a comparison chart of CD elastic recovery rates in Examples 1 to 3;

[0042] Figure 5 is a comparison chart of CD elastic recovery rates in Example 1 and Example 4;

[0043] Figure 6 is a comparison chart of the elastic recovery rates in Example 1 and Examples 5 to 8;

[0044] Figure 7 is a comparison chart of the elastic recovery rates in Example 1 and Examples 9 to 11;

[0045] Figure 8 is a comparison chart of the drape coefficients in Examples 1 to 3;

[0046] Fig. 9 is a comparison diagram of the drape coefficients in Example 1 and Example 4;

[0047] Fig.10 is a comparison chart of the drape coefficients in Example 1 and Examples 5 to 8;

[0048] Fig.11 is a comparison chart of the drape coefficients in Example 1 and Examples 9 to 11;

[0049] 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

[0050] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0051] Example 1

[0052] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, such as Figure 1 and 2 As shown, the specific production steps are as follows:

[0053] S1, manufacturing low elastic spunbond layer 11 and high elastic spunbond layer 12

[0054] In the step of making the low-elasticity spunbond layer 11, raw materials are prepared, including blending according to a mass ratio:

[0055] PP: 45%~61%;

[0056] POE: 30%~52%;

[0057] Cooling masterbatch: 3% to 9%;

[0058] In this embodiment, the PP (polypropylene) is added with 45% when making the low elastic spunbond layer 11, and is purchased directly from Sinopec, with the model number of PPH-Y40;

[0059] The POE (polyolefin elastomer) is a thermoplastic elastomer with a narrow relative molecular mass 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 by 52%, which is purchased directly from ExxonMobil Corporation and has a model of 7050FL.

[0060] The cooling masterbatch is prepared by pre-mixing the xylitol cooling finishing agent, so that the product finally has a cooling feeling. In this embodiment, when making the low elasticity spunbond layer 11, the cooling masterbatch is added 3%. The xylitol cooling finishing agent is directly purchased from Wujiang Jincheng Fine Chemical Co., Ltd., model JINC-L102.

[0061] The prepared raw materials are transported and preheated in the feeding section of screw 2, and then compacted, exhausted 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 transports the raw materials to the spinning box 4 at a spinneret speed of 10-40rpm;

[0062] The box temperature of the spinning box 4 is 210°C, and an airflow stretching device 5 is arranged at the bottom of the spinning box 4. The fiber filaments ejected from the spinneret pass through the airflow stretching device 5 at the bottom, are first rapidly cooled in the cooling air, and then stretched in the traction air. The stretched spinnerets enter the mesh curtain 6 to form a messy curly low-elastic spunbond layer 11. The spunbond process is a mature process well known to those skilled in the art, and will not be described in detail here.

[0063] In the step of preparing the high elastic spunbond layer 12, the raw materials prepared include blending according to a mass ratio:

[0064] PP: 1%~10%;

[0065] POE: 78%~90%;

[0066] LLDPE: 6%~11%;

[0067] 1#: 1% to 3%;

[0068] In this embodiment, when making the high elastic spunbond layer 12, PP is added by 9% and POE is added by 78%;

[0069] The ratio of the amount of POE added to the raw material of the high elastic spunbond layer 12 to the amount of POE added to the raw material of the low elastic 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 elastic spunbond layer 12 to the amount of POE added to the raw material of the low elastic spunbond layer 11 is 1.5:1.

[0070] The LLDPE (linear low-density polyethylene) has a relatively high softening temperature and melting temperature, and has the advantages of high strength, good toughness, high rigidity, good heat resistance, good cold resistance, etc. It has good resistance to environmental stress cracking, impact strength and tear strength. In this embodiment, when making the high-elastic spunbond layer 12, LLDPE is added by 10%, which is purchased directly from the Dow Group of the United States, and the model is 1648B.

[0071] The 1# is a softener, which can change the static and dynamic friction coefficients of the fiber. When the static friction coefficient is changed, the hand feels smooth and easy to move on the fiber or fabric; when the dynamic friction coefficient is changed, the fine structure between the fibers is easy to move relative to each other, that is, the fiber or fabric is easy to deform. The combined feeling of the two is softness. In this embodiment, when making the high elastic spunbond layer 12, the 1# is added by 3%, which is directly purchased from Guangdong Baole Nonwoven Fabric Co., Ltd.

[0072] In this step, the manufacturing process and raw material purchasing manufacturer of the high elastic spunbond layer 12 are consistent with those of the low elastic spunbond layer 11 , and the high elastic spunbond layer 12 is formed on the mesh curtain 6 by spunbonding technology.

[0073] S2, Spunbond layer composite

[0074] Three production lines are set up to carry out the spunbond process simultaneously, and the produced elastic spunbond layer is 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.

[0075] The mesh curtain 6 is firstly passed through a low-speed traction roller 7 for hot rolling bonding to form a composite nonwoven fabric with elasticity;

[0076] After passing 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 non-woven fabric radially, and shrinks in the weft direction during the stretching process. A drying device 9 is arranged outside the low-speed traction roller 7 and the high-speed traction roller 8. The high-speed traction roller 8 stretches the non-woven fabric under high temperature, accelerates the melting and polycondensation of the non-woven fabric, and makes the composite non-woven fabric have a quantitative elastic effect.

[0077] 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.

[0078] The temperature in the drying device 9 is 80°C to 150°C, and the speed difference between the low-speed traction roller 7 and the high-speed traction roller 8 is 2 to 8 r / min. In this embodiment, the drying temperature is 120°C, the speed of the low-speed traction roller 7 is 14 r / min, and the speed of the high-speed traction roller 8 is 19 r / min;

[0079] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 5 r / min.

[0080] Through this step, the non-woven fabric is compounded with three spunbond layers, namely, the low elastic spunbond layer 11, the high elastic spunbond layer 12 and the low elastic spunbond layer 11, and has a quantitative elastic effect through high temperature melt polycondensation.

[0081] S3, cooling and shaping

[0082] The composite layer obtained in S2 enters a 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 to cool the temperature.

[0083] After cooling, the quantitative elastic nonwoven fabric 1 is shaped.

[0084] S4, Rolling

[0085] The formed quantitative elastic nonwoven fabric 1 is rolled up for later use.

[0086] Example 2

[0087] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0088] The difference between this embodiment and embodiment 1 is that when making the low elastic spunbond layer 11, POE is added by 32%; when making the high elastic spunbond layer 12, POE is added by 80%;

[0089] The ratio of the amount of POE added in the raw material of the high-elasticity spunbond layer 12 to the amount of POE added in the raw material of the low-elasticity spunbond layer 11 is 2.5:1.

[0090] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0091] Example 3

[0092] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0093] The difference between this embodiment and embodiment 1 is that when making the low elastic spunbond layer 11, POE is added by 30%; when making the high elastic spunbond layer 12, POE is added by 90%;

[0094] The ratio of the amount of POE added in the raw material of the high-elasticity spunbond layer 12 to the amount of POE added in the raw material of the low-elasticity spunbond layer 11 is 3:1.

[0095] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0096] Example 4

[0097] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0098] 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.

[0099] 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 as in Example 1, which is 2.5:1.

[0100] Example 5

[0101] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and 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 18 r / min;

[0103] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 4 r / min.

[0104] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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 6

[0106] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0107] The difference between this embodiment and embodiment 1 is that in the step S3, spunbond layer compounding, 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;

[0108] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 2 r / min.

[0109] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0110] Example 7

[0111] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0112] The difference between this embodiment and embodiment 1 is that in the 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;

[0113] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 6 r / min.

[0114] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0115] Example 8

[0116] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0117] The difference between this embodiment and embodiment 1 is that in the step S3, spunbond layer compounding, 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;

[0118] That is, the speed difference between the low-speed pulling roller 7 and the high-speed pulling roller 8 is 8 r / min.

[0119] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0120] Example 9

[0121] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0122] 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.

[0123] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0124] Example 10

[0125] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0126] The difference between this embodiment and embodiment 1 is that in S3, the process of spunbond layer compounding, the temperature in the drying device 9 is 130°C.

[0127] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0128] Embodiment 11

[0129] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0130] The difference between this embodiment and embodiment 1 is that in S3, the process of spunbond layer compounding, the temperature in the drying device 9 is 150°C.

[0131] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0132] Example 12

[0133] This embodiment provides an application of a quantitative elastic nonwoven fabric in making a facial mask, and the specific production steps are as follows:

[0134] The difference between this embodiment and embodiment 1 is that when making the high elastic spunbond layer 12, 1# is not added;

[0135] In addition, the same method as in Example 1 is used to obtain a three-layer spunbond 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.

[0136] In order to verify the preparation method and material properties in this solution, performance tests were carried out on the twelve implemented products, and the test contents were CD (weft) elastic recovery rate and drape.

[0137] The specific test methods, test standards and test instruments are as follows:

[0138] 1. Elastic recovery rate

[0139] Test method:

[0140] S1. Sampling

[0141] Take a quantitative elastic fabric with a length of 50 mm and a width of 25 mm;

[0142] S2. Fix the sample

[0143] 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.

[0144] The clamps are spaced 50 mm apart. The strength value is observed through the strength test software to ensure that the strength reading is 0.

[0145] S3, tensile test

[0146] Set the control scheme to CD5N constant force stretching, and the stretching speed is 100mm / min;

[0147] During the test, when the tension is removed, the nonwoven fabric shrinks, L0 is the test length, L1 is the stretching length, L3 is the recovery length, and L4 is the stretching deformation length.

[0148]

[0149] Test standard: elastic recovery rate is 14.5%±0.3%.

[0150] Testing instrument: Nonwoven material constant temperature mechanical properties analyzer (HD026S model, Nantong Hongda Experimental Instrument Co., Ltd., China).

[0151] The final test results are shown in the table:

[0152] 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 Embodiment 11 50 50 7.155 92.845 14.31 Example 12 50 50 7.113 92.887 14.226

[0153] In the process test, based on the elasticity test, the CD elastic recovery rate of the quantitative elastic nonwoven fabric 1 fluctuated within the range of 14.5%±0.3%.

[0154] In the process test, based on the test of different POE addition ratios in the raw materials of the high elastic spunbond layer 12 and the low elastic spunbond layer 11, refer to Figure 4 , combined with Example 1, Example 2 and Example 3, when the ratio of the amount of POE added in the raw materials of the high elastic spunbond layer 12 and the low elastic spunbond layer 11 is in the range of 1.5 to 3:1, the elastic recovery rate of the CD of the quantitative elastic non-woven fabric 1 is 14.5% ± 0.3%. At the same time, it is concluded that the elastic recovery rate of the CD of the quantitative elastic non-woven fabric 1 decreases as the ratio difference of the amount of POE added in the raw materials of the high elastic spunbond layer 12 and the low elastic spunbond layer 11 increases. Preferably, the ratio of the amount of POE added in the raw materials of the high elastic spunbond layer 12 and the low elastic spunbond layer 11 is 1.5:1, and the elastic recovery rate of the CD of the quantitative elastic non-woven fabric 1 is 14.5%.

[0155] In the process test, the low elastic spunbond layer 11 and the high elastic spunbond layer 12 obtained by the same method were compounded in different orders, referring to Figure 5 , combined with Example 1 and Example 4, in Example 1, the three spunbond layers of low elasticity spunbond layer 11, high elasticity spunbond layer 12, and low elasticity spunbond layer 11 are compounded, and the elastic recovery rate is 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 are compounded, and the elastic recovery rate is 14.498%. The elastic recovery rates of the two embodiments are very close, so it can be seen 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 scheme, the order of compounding is preferably the same as that of Example 1, 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 compounded.

[0156] In the process test, based on the speed difference between the low-speed traction roller 7 and the high-speed traction roller 8, the reference Figure 6As with Example 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 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 tensile force 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.

[0157] In the process test, the quantitative elastic nonwoven fabric 1 produced based on the temperature in the drying device 9 is shown in the fold line below. Figure 7 As with Example 1 and Examples 9 to 11, when the temperature in the drying device 9 is between 80°C and 150°C, the prepared quantitative elastic nonwoven fabric 1 meets the requirements of this scheme, and other conditions remain unchanged. When the temperature is less than 120°C, the elastic recovery rate of the quantitative elastic nonwoven fabric 1 decreases, and when the temperature is greater than 120°C, the elastic recovery rate of the quantitative elastic nonwoven fabric 1 increases. However, when the temperature exceeds 130°C, the temperature to which the quantitative elastic nonwoven fabric 1 is subjected is too high, and the elastic recovery rate gradually decreases. Therefore, it is preferred that the temperature of the drying device 9 is 120°C, at which temperature the elastic recovery rate of the quantitative elastic nonwoven fabric 1 is 14.5%.

[0158] In the process test, a comparison was made based on the quantitative elastic nonwoven fabric 1 with and without the addition of 1#. 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#.

[0159] The following conclusions were obtained by analyzing the process test and the test results of the embodiments: the quantitative elastic nonwoven fabric 1 prepared in the present application fully utilizes the elasticity standard that reaches the quantitative elasticity.

[0160] 2. Overhang

[0161] S1. Sampling

[0162] Take a quantitative elastic fabric with a long diameter of 24 mm;

[0163] S2. Fix the sample

[0164] In this experiment, a cut circular test sample is first fixed to the instrument clamping plate with a diameter of 12 mm.

[0165] S3, test overhang coefficient

[0166] The projection image of the test sample is obtained by irradiating with parallel light perpendicular to the horizontal plane. The percentage of the projection area to its original area is calculated by image processing method to obtain the overhang coefficient, which is calculated as follows:

[0167]

[0168] in

[0169] K0 is the overhang coefficient;

[0170] A D is the horizontal projection area of ​​the test sample;

[0171] A F is the area of ​​the test sample;

[0172] A d is the area of ​​the instrument holding plate.

[0173] Test standard: drape coefficient <35%.

[0174] The smaller the drape coefficient of the fabric, the better the drape. In the prior art, the drape of nonwoven fabrics made by spunbond technology is worse than that of fabrics made by textile technology, and the skin-friendly effect and softness are not good. The drape coefficient of the quantitative elastic nonwoven fabric 1 provided in this solution should reach the standard of <35%.

[0175] Test instrument: Fabric drape tester (Model XDP-1, Shanghai Xinxian Instrument Co., Ltd., China).

[0176] In the process test, based on the drape test, the drape coefficient of the quantitative elastic nonwoven fabric 1 fluctuated within the range of 15% to 30%, and the drape coefficient was below 35%, which met the test standard.

[0177] The final test results are shown in the table:

[0178] <![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 Embodiment 11 189.342 113.04 452.16 22.5 Example 12 175.7772 113.04 452.16 18.5

[0179] In the process test, the addition ratio of POE in the raw materials of the high elastic spunbond layer 12 and the low elastic spunbond layer 11 is tested. The rigidity of POE is less than that of PP, and rigidity is one of the important factors affecting drape. The greater the rigidity, the worse the drape.

[0180] Reference Figure 8 , combining Example 1, Example 2 and Example 3, comparing the PP addition amount of the quantitative elastic non-woven fabric 1, it is found that Example 1 < Example 2 < Example 3;

[0181] Preferably, the ratio of the amount of POE added in 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%.

[0182] In the process test, the low elastic spunbond layer 11 and the high elastic spunbond layer 12 obtained by the same method were compounded in different orders, referring to Fig. 9 , combined with Example 1 and Example 4, in Example 1, the three spunbond layers of low elasticity spunbond layer 11, high elasticity spunbond layer 12, and low elasticity spunbond layer 11 are compounded, and the drape coefficient of the quantitative elastic non-woven fabric 1 is 15%; in Example 4, the three spunbond layers of high elasticity spunbond layer 12, low elasticity spunbond layer 11, and high elasticity spunbond layer 12 are compounded, and the drape coefficient of the quantitative elastic non-woven fabric 1 is 16.5%. The elastic recovery rates of the two embodiments are very close, so it can be seen 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 drape coefficient of the quantitative elastic non-woven fabric 1. In this scheme, the order of compounding is preferably the same as that of Example 1, 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 compounded.

[0183] In the process test, based on the speed difference between the low-speed traction roller 7 and the high-speed traction roller 8, the reference Fig.10 As with Example 1 and Examples 5 to 8, when the speed difference between the low-speed traction roller 7 and the high-speed traction roller 8 is within the range of 2 to 8 r / min, the prepared quantitative elastic nonwoven fabric 1 meets the requirements of this solution, and when the speed difference between the low-speed traction roller 7 and the high-speed traction roller 8 is 5 r / min, the drape coefficient of the quantitative elastic nonwoven fabric 1 is 15%, and the drape is optimal. If the speed difference between the low-speed traction roller 7 and the high-speed traction roller 8 is greater than or less than 5, the drape coefficient of the quantitative elastic nonwoven fabric 1 will increase, and the drape will become relatively worse.

[0184] In the process test, the quantitative elastic nonwoven fabric 1 produced based on the temperature in the drying device 9 is Fig.11 As in Example 1 and Examples 9 to 11, when the temperature in the drying device 9 is between 80° C. and 150° C., the prepared quantitative elastic nonwoven fabric 1 meets the requirements of this solution, and the temperature in the drying device 9 is preferably 120° C. When other conditions remain unchanged, when the temperature is greater than or less than 120° C., the drape coefficient of the quantitative elastic nonwoven fabric 1 will increase, and the drape property will become relatively worse.

[0185] In the process test, a comparison was made based on the presence or absence of the addition of 1# to the quantitative elastic nonwoven fabric 1. 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 is preferred to add 1#.

[0186] The following conclusions were drawn from the analysis of the process test and the test results of the embodiments: the quantitative elastic nonwoven fabric 1 prepared by the spunbond process in the present application has a drape coefficient of less than 35%, has good drape, is more skin-friendly, softer, and more comfortable.

[0187] In summary, the manufacturing method of the quantitative elastic non-woven fabric 1 provided in the present application is to form an elastic non-woven fabric by compounding spunbond layers with different elasticities through a spunbond process; a speed difference is generated between the low-speed traction roller 7 and the high-speed traction roller 8, so that the elastic non-woven fabric under high temperature is stretched, and the non-woven fabric accelerates the melting and condensation, and has a lateral quantitative elastic effect. At the same time, the touch is softer, the drape is higher, and the comfort is stronger.

[0188] The above implementation is only to illustrate the technical concept and features of this solution, and its purpose is to enable people familiar with this technology to understand the content of this solution and implement it accordingly, and it cannot be used to limit the protection scope of this solution. Any equivalent transformation or modification made according to the spirit of this solution should be included in the protection scope of this solution.

[0189] In the description of this scheme, it should be noted that, unless otherwise clearly stipulated 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, and it can be the internal connection of two elements.

[0190] For those skilled in the art, the specific meanings of the above terms in this solution can be understood according to specific circumstances.

[0191] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present 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 protection scope of the present solution.

Claims

1. A method for producing a quantitative elastic nonwoven fabric, characterized in that: The production steps include: S1. Prepare raw materials to make an elastic spunbond layer based on a spunbond process, including a low-elastic spunbond layer (11) and a high-elastic spunbond layer (12); the ratio of the amount of POE added in the raw materials of the high-elastic spunbond layer (12) and the low-elastic spunbond layer (11) is 1.5 to 3:1; S2, forming an elastic non-woven fabric based on a hot-rolled composite three-layer spunbond layer, wherein the upper and lower layers of the elastic non-woven fabric have the same elasticity, wherein the spunbond layer is firstly subjected to hot-rolling bonding by a low-speed traction roller (7), and then subjected to stretching by a high-speed traction roller (8), a drying device (9) is arranged outside the low-speed traction roller (7) and the high-speed traction roller (8), the temperature inside the drying device (9) is 80° C. to 150° C., and the speed difference between the low-speed traction roller (7) and the high-speed traction roller (8) is 2 to 8 r / min; S3, after the composite layer leaves the high-speed traction roller (8), it enters a cooling area and is cooled to room temperature; S4. Roll up.

2. The manufacturing method according to claim 1, characterized in that: S1. Three production lines are set up to carry out the spunbond process simultaneously. The elastic spunbond layers produced are laid on the mesh curtain (6), which are the low-elasticity spunbond layer (11), the high-elasticity spunbond layer (12), and the low-elasticity spunbond layer (11), or the high-elasticity spunbond layer (12), the low-elasticity spunbond layer (11), and the high-elasticity spunbond layer (12).

3. The manufacturing method according to claim 2, characterized in that: The low-elasticity spunbond layer (11) is prepared by mixing the following raw materials in a mass ratio: PP: 45%~61%; POE: 30%~52%; Cooling masterbatch: 3%~9%.

4. The manufacturing method according to claim 3, characterized in that: The low-elasticity spunbond layer (11) is prepared by mixing the following raw materials in a mass ratio: The PP is added by 45%; The POE is added by 52%; The cooling masterbatch is added at 3%.

5. The manufacturing method according to claim 2, characterized in that: The raw materials for preparing the high elastic spunbond layer (12) include the following blended in a mass ratio: PP: 1%~10%; POE: 78%~90%; LLDPE: 6%~11%; 1#：1％～3％。 6. The manufacturing method according to claim 5, characterized in that: The raw materials for preparing the high elastic spunbond layer (12) include the following blended in a mass ratio: PP: 9%; POE: 78%; The LLDPE: 10%; Said 1#: 3%.

7. The manufacturing method according to claim 1, characterized in that: The ratio of the amount of POE added in the raw material of the high-elasticity spunbond layer (12) to the amount of POE added in the raw material of the low-elasticity spunbond layer (11) is 1.5:

1.

8. The manufacturing method according to claim 1, characterized in that: The temperature in the drying device (9) is 120°C.

9. The manufacturing method according to claim 1, characterized in that: The speed difference between the low-speed traction roller (7) and the high-speed traction roller (8) is 5 r / min.

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