TWM635801U - Elastic composite non-woven fabric and the manufacturing equipment of the same - Google Patents

Abstract

An elastic composite non-woven fabric and the manufacturing equipment thereof, wherein the elastic composite non-woven fabric manufacturing equipment includes upper feed roller, upper shrink roller, upper laminating roller, upper fins, middle feed roller, winding roller, lower feed roller, lower shrink roller, lower laminating roller, and lower fins. Wherein, two elastic non-woven fabrics shrink inward by the shrink roller and enter the gaps among grooves and teeth of the laminating roller and the fins to form regular wavy folds; the two pre-shrinked elastic non-woven fabrics are attached to the upper and lower surfaces of the elastic material in a flat state by the aligned and adjacently disposed teeth of the laminating roller, thereby forming an elastic composite non-woven fabric.

Description

Elastic composite nonwoven fabric and its manufacturing equipment

The present invention relates to an elastic composite non-woven fabric and its manufacturing equipment, in particular to an elastic composite non-woven fabric in which preshrunk elastic non-woven fabric is laminated with an elastic material and its manufacturing equipment.

General hygiene products, such as masks, laundry-free pants, infant diapers or adult diapers, or sports protective bandages, medical bandages, etc., are usually in a disposable or disposable form when hygiene and use safety are considered to avoid exposure to Contamination by germs or harmful substances. Because this type of product will be in contact with the skin for a period of time, the requirements for air permeability are relatively strict, so as to prevent discomfort or skin allergies, itching, or even rashes caused by stuffy heat or humidity.

Due to the advantages of easy manufacturing, processing, good chemical resistance, durability and low cost, non-woven fabrics made of plasticized materials have been widely used in many sanitary products. However, the stretchability of non-woven fabrics is poor, and the comfort and covering performance are insufficient. For wearable applications, such as diapers, it will cause inconvenience in use. Therefore, the industry has developed a composite nonwoven fabric with improved extensibility, which can be called an elastic composite nonwoven fabric.

In the production process of existing elastic composite non-woven fabrics, a commonly used method is to pre-stretch a piece of elastic material as the middle layer, and then use two pieces of non-elastic ordinary non-woven fabrics as the upper layer and the lower layer respectively, and laminate them in a sandwich way, and Stop applying external force for stretching after fitting. At this time, the elastic material returns to its natural state due to its tensile properties, while the ordinary non-woven fabric attached to the upper and lower surfaces of the elastic material forms wave creases. In this way, elastic composite nonwovens are produced without destroying the structure of the nonwoven.

Another commonly used method is to use a piece of elastic material as the middle layer without stretching, and then use two pieces of non-elastic ordinary non-woven fabrics as the upper layer and the lower layer respectively, and laminate them in a sandwich way to form a flat three-layer fabric. layer structure. After lamination, the ordinary non-woven material is slightly extensible by destroying the surface of the ordinary non-woven material, such as activation (Activation) without damaging the elastic material. In this way, since the non-woven fabric is damaged during the activation process, its tensile strength is insufficient and it is easy to tear.

In addition, in the prior art, the extensibility of the elastic composite non-woven fabric is often used as the appeal. However, the prior art lacks improvement for the recovery ability of elastic composite non-woven fabrics (especially elastic materials).

However, since ordinary non-woven fabrics without elasticity have almost no extensibility, they will reach the stretch limit when stretched a little, so they are easy to tear; moreover, the weft tensile limit of such elastic composite non-woven fabrics is equivalent to that of ordinary non-woven fabrics without elasticity. The weft tensile limit of the elastic composite nonwoven fabric has the following problems: one, there are limitations in stretching, because the tensile limit limit extension of the elastic composite nonwoven fabric is mostly limited by the tensile limit of the nonwoven fabric material; , the tensile strength is insufficient and easy to tear, because the structure of non-woven fabrics and elastic materials is easily damaged during the activation process, resulting in insufficient tensile strength; third, the material has no air permeability; fourth, the extensibility and recovery force are insufficient and the production efficiency is low , so it is necessary to stretch a large area of elastic material to meet its extension and recovery force requirements.

The main purpose of the new model is to provide an elastic composite non-woven fabric, which is made of pre-shrunk elastic non-woven fabric and elastic material. Through the manufacturing equipment of elastic composite non-woven fabrics according to the present invention, the elastic non-woven fabrics with high elongation (Elongation), high tensile strength (Tensile strength) and high recovery force are arranged in waves and then laminated with elastic materials to make elastic The composite non-woven fabric makes the surface of the elastic composite non-woven fabric produce regular wave wrinkles that can be adjusted to a certain extent.

Another object of the present invention is an elastic composite non-woven fabric, wherein the more stretched the elastic material is, the greater its restoring force is, so a shorter piece width can be used to meet higher stretching and restoring force requirements.

As used herein, "natural width" refers to the width of a material in a state where it has not been shrunk or stretched by external forces.

As used herein, "elongation" refers to the ratio of the amount by which a material is stretched from its natural width to the natural width of the material.

In this paper, "shrinkage" refers to the ratio of the amount of shrinkage of the elastic nonwoven fabric from its natural width to its natural width after undergoing wavy indentation.

In this context, "recovery force" refers to the tensile force experienced by a material when it is stretched.

In this article, unless otherwise specified, "stretching", "shrinking", and "heat shrinking" are all carried out in the weft direction.

In order to achieve the aforementioned purpose, the present invention provides an elastic composite non-woven fabric manufacturing equipment, including: An upper part is provided with an upper supply roller, an upper shrink roller, an upper laminating roller, and a plurality of upper fins; a middle section, provided with a middle supply roll and a take-up roll; and The lower part is provided with a lower supply roller, a lower shrinkage roller, a lower bonding roller, and a plurality of lower fins, among which The upper shrink roll and the lower shrink roll each comprise: a body, which is a column; A first thread and a second thread are provided on the body of the corresponding one of the upper shrinking roller and the lower shrinking roller and are centered with respect to the longitudinal axis of the corresponding one of the upper shrinking roller and the lower shrinking roller set vertically symmetrically; and The upper lamination roll and the lower lamination roll each comprise: a body, which is a column; A plurality of tooth portions are arranged parallel to each other at fixed intervals on the outer peripheral surface of the main body of the corresponding one of the upper and lower bonding rollers, and perpendicular to the corresponding one of the upper and lower bonding rollers. the longitudinal axis of one of; and A plurality of grooves are formed on a corresponding one of the upper lamination roller and the lower lamination roller where the teeth are not provided; and The upper fins and the lower fins each have a flat shape and include: A first end, pivotally fixed to the elastic composite non-woven fabric manufacturing equipment; a second end disposed in a corresponding one of the grooves; and a shoulder disposed between the first end and the second end; wherein the contours of the upper fins and the lower fins from the shoulder to the second end substantially match the contour of the outer peripheral surface of the main body of a corresponding one of the upper laminating roller and the lower laminating roller; and wherein The upper supply roller, the middle supply roller, and the lower supply roller respectively supply a first elastic non-woven fabric, an elastic material, and a second elastic non-woven fabric, The upper shrinking roller receives the first elastic non-woven fabric, and the first thread and the second thread of the upper shrinking roller are arranged symmetrically so that the first elastic non-woven fabric shrinks toward the center along a direction parallel to the upper shrinking roller, Make the first elastic non-woven fabric fall into the gaps between the grooves, the teeth and the upper fins of the upper laminating roller in a non-stretched state, and make the first elastic non-woven fabric shrink inward in waves form regular wavy folds, The lower shrinking roller receives the second elastic non-woven fabric, and the first thread and the second thread of the lower shrinking roller are arranged symmetrically so that the second elastic non-woven fabric shrinks toward the center along a direction parallel to the lower shrinking roller, Make the second elastic non-woven fabric fall into the grooves and the teeth of the lower bonding roller and the gaps between the lower fins in a non-stretched state, so that the second elastic non-woven fabric is arranged in waves to form regular wavy folds, Wherein, the rotation speeds of the upper supply roller, the upper contraction roller, the lower supply roller and the lower contraction roller are greater than the rotation speeds of the upper lamination roller and the lower lamination roller, thereby forming a speed difference, the first elastic nonwoven fabric and The second elastic non-woven fabric is introduced between the upper fin and the lower fin due to the speed difference; The teeth of the upper bonding roller and the teeth of the lower bonding roller are respectively aligned and adjacent to each other, so that the teeth of the upper bonding roller and the teeth of the lower bonding roller The first elastic non-woven fabric that is pre-shrunk to form regular wavy wrinkles, the elastic material supplied by the middle supply roller, and the second elastic non-woven fabric that is pre-shrunk to form regular wavy wrinkles are pasted. combined to form an elastic composite nonwoven fabric, and The winding roll winds the elastic composite nonwoven fabric for collection.

In order to achieve the aforementioned purpose, the present invention also provides an elastic composite non-woven fabric, including: An elastic material, which is a planar shape, and comprises an elastic film, an elastic non-woven fabric, or a combination thereof; and a first elastic non-woven fabric and a second elastic non-woven fabric, which are arranged in waves and have regular wavy folds, Wherein, the first elastic non-woven fabric and the second elastic non-woven fabric are pre-shrunk to form regular wavy folds, and the respective wavy folds are aligned with each other and are attached to the upper surface of the elastic material in a symmetrical manner with respect to the elastic material. and the lower surface, in, The elongation of the first elastic nonwoven fabric and the second elastic nonwoven fabric is 50 to 200%, The shrinkage range of the first elastic non-woven fabric and the second elastic non-woven fabric is 50 to 85%, The elastic material has an elongation of 600 to 1300%, and The elongation of the elastic composite non-woven fabric is 300 to 1000%.

The effect of the new model is that, for example, through the elastic composite non-woven fabric manufacturing equipment or manufacturing method, the two elastic non-woven fabrics are pre-shrunk to form a wave surface, and then the pre-shrunk two elastic non-woven fabrics are attached to the elastic material. surface and subsurface. Therefore, the elastic composite non-woven fabric of the present invention can have high elongation, high tensile strength and high recovery force, so that the surface of the elastic composite non-woven fabric will produce a certain degree of regular wave wrinkles.

Furthermore, since the elongation of the elastic composite non-woven fabric is greatly improved, users can use a smaller piece width. Therefore, in the factory building, the elastic composite nonwoven fabric of each cylindrical parent roll can be cut into more cylindrical small rolls of elastic composite nonwoven fabric, thereby improving production efficiency.

Referring to Fig. 1, Fig. 1 shows the tensile test results of the novel elastic material at different widths of the cut pieces, wherein the width of the small cut piece is 5 cm, and the width of the large cut piece is 10 cm. Except that the tensile test method is to stretch the elastic material from the natural state until it reaches the tensile limit, that is, until it breaks, the tensile test conditions and methods are the same as those described in Examples 1 to 6 below. It can be seen from Figure 1 that for large pieces, an elongation of 791% (that is, stretching to a width 8.91 times its natural width) is required to achieve a recovery force of 3000 g/in; while for small pieces , only an elongation of 422% (ie, stretched to a width 5.22 times its natural width) is required to achieve the same restoring force. Furthermore, at the limit of stretch (the end of the curve), the elongation of the large panel elastic (900 to 950%) is about twice that of the small panel elastic (approximately 450%).

Therefore, according to the elastic composite non-woven fabric of the present invention, a smaller piece width can be used to meet higher requirements for extension and recovery force, and the comfort and covering performance can be greatly improved.

The implementation of the present invention will be described in more detail below with reference to the figures and symbol numbers, so that those skilled in the art can implement it after studying this specification.

In this specification, the natural width is defined as the width in a natural state that is not stretched or shrunk by external force.

In the present model, under the condition of no conflict, the technical characteristics of any one of the elastic composite nonwoven fabric, its manufacturing equipment, and its manufacturing method can be applied to the elastic composite nonwoven fabric of the present invention, its manufacturing Any of the device and its manufacturing method.

In order to achieve the above purpose, the present invention provides an elastic composite non-woven fabric and its manufacturing equipment and manufacturing method, wherein the elastic composite non-woven fabric 1 is made by laminating pre-shrunk elastic non-woven fabrics 20, 30 and elastic materials 10 (as shown in Figure 5d ).

Referring to FIG. 2 , it shows a schematic diagram of the process for preparing elastic nonwoven fabrics with different elongations through thermal shrinkage used in the present invention. The elastic non-woven fabrics 20 and 30 used in the present invention are formed by processing non-elastic ordinary non-woven fabrics through thermal shrinkage technology, thereby endowing the non-woven fabrics with extensibility. Specifically, the ordinary nonwoven fabric can be supplied to the heat shrinking equipment along the first direction d1, so that the ordinary nonwoven fabric can shrink from its original width (W4 in Figure 2) to the heat shrinkable width W1 (for example, W1a, W1b, or W1c); wherein, the original width of the ordinary nonwoven fabric is 1.5 to 3 times the heat-shrinkable width.

Thereafter, the formed elastic nonwoven fabric 20, 30 can be stretched from its natural width to a width corresponding to the original width of a conventional nonwoven fabric. Accordingly, the elastic nonwoven fabric 20, 30 can be stretched to a width of 1.5 to 3 times its natural width, ie, has an elongation of 50 to 200%.

Therefore, the natural width of the elastic non-woven fabric 20, 30 is defined as the first natural width W1. The width of the elastic nonwoven fabric 20, 30 in a state of being stretched to 1.5 to 3 times its natural width is defined as a first stretched width W4. In other words, the original width of the ordinary nonwoven fabric is equal to the stretched width W4 of the elastic nonwoven fabric 20, 30 after heat shrinkage, while the heat shrinkable width of the ordinary nonwoven fabric is equal to the natural width W1 of the elastic nonwoven fabric 20, 30 after heat shrinkage.

As shown in FIG. 2 , in a particular embodiment, elastic nonwoven fabrics 20, 30 each having different elongation rates (50%, 100%, 200%) can be stretched to 1.5 times, 2 times, or 2 times their natural width, respectively. or 3 times the width, and thus can be stretched from the first natural width W4 to the first stretched width W1a, W1b, or W1c respectively.

The heat-shrinking process and heat-shrinking equipment for processing ordinary non-woven fabrics into elastic non-woven fabrics are specifically disclosed in the patent US 5244482, wherein the heat-shrinking equipment includes an oven and front and rear conveying rollers, and the front and rear conveying rollers have a certain speed difference, so Ordinary non-woven fabrics can be processed into elastic non-woven fabrics through heat shrinkage.

Referring to FIG. 3 , it shows a front view of the manufacturing equipment 40 of elastic composite nonwoven fabric of the present invention, wherein, for the convenience of illustration, no shell or frame is drawn. The elastic composite non-woven fabric manufacturing equipment 40 provided by the present invention includes: an upper part 50, which is provided with an upper supply roller 51, an upper shrinkage roller 52, an upper lamination roller 53, and a plurality of upper fins 54; a middle part 60, which is provided with a middle supply roller 61 and the winding roller 62; and the lower part 70 is provided with a lower supply roller 71, a lower shrinkage roller 72, a lower bonding roller 73, and a plurality of lower fins 74.

In the elastic composite non-woven fabric manufacturing equipment 40 of the present invention, the elastic non-woven fabric is pre-shrunk by using the upper shrinkage roller 52 and the lower shrinkage roller 72, and the pre-shrinked elastic The non-woven fabric is laminated with the elastic material to form the elastic non-woven fabric of the present invention. The upper fins 54 and the lower fins 74 are used in conjunction with each other to make the elastic non-woven fabric have regular wave folds after being arranged in waves. Material fit.

Preferably, relative to the middle part 60 (especially relative to the elastic material 10 located in the middle part 60), the upper supply roller 51, the upper shrinkage roller 52, the upper laminating roller 53, and the upper fins 54 are respectively connected with the lower supply roller 71, The lower shrinking roller 72, the lower bonding roller 73, and the lower fins 74 are arranged symmetrically. Preferably, the upper supply roller 51 , the upper shrinkage roller 52 , the upper lamination roller 53 , the middle supply roller 61 , the winding roller 62 , the lower supply roller 71 , the lower shrinkage roller 72 and the lower lamination roller 73 are arranged parallel to each other.

Referring to Fig. 4a, it shows a side view of the upper part 50 of the new elastic composite nonwoven fabric manufacturing equipment 40 observed from the right side of Fig. 3, wherein, for the convenience of illustration, the first elastic nonwoven fabric 20 and the upper supply roller 51 are not drawn. The upper shrinking roller 52 includes: a body 52a, which is cylindrical; The upper laminating roller 53 comprises: a main body 53a, which is a column; a plurality of tooth portions 53b (convex surfaces) are arranged on the outer peripheral surface of the main body 53a parallel to each other at fixed intervals, and perpendicular to the longitudinal axis of the upper laminating roller 53 ; and a plurality of groove portions 53c (concave surfaces) are formed in the portion of the upper bonding roller 53 where the tooth portion 53b is not provided.

Referring to Figure 3 and Figure 4b, Figure 4b shows a cross-sectional view (viewed from the right) of the middle part 60 of the new elastic composite nonwoven fabric manufacturing equipment 40 taken along the line II' of Figure 3. Each of the upper fin 54 and the lower fin 74 is a flat shape, and is preferably a metal fin.

Each upper fin 54 includes: a first end 54a, which is pivotally fixed to the elastic composite nonwoven fabric manufacturing equipment 40; a second end 54b, which is arranged in a corresponding one of the grooves 53c of the upper laminating roller 53; and a shoulder 54c disposed between the first end 54a and the second end 54b. The contour of the shoulder 54 c to the second end 54 b of each upper fin 54 substantially matches the contour of the outer peripheral surface of the main body 53 a of the upper laminating roller 53 .

Each lower fin 74 includes: a first end 74a, which is pivotally fixed to the elastic composite nonwoven fabric manufacturing equipment 40; a second end 74b, which is arranged in a corresponding one of the grooves 73c of the lower bonding roller 73; and The shoulder 74c is disposed between the first end 74a and the second end 74b. The contour of the shoulder 74 c to the second end 74 b of each lower fin 74 substantially matches the contour of the outer peripheral surface of the main body 73 a of the lower laminating roller 73 .

Referring to Fig. 4c, it shows a side view of the lower part 70 of the new elastic composite nonwoven fabric manufacturing equipment 40 viewed from the right side of Fig. 3, wherein, for the convenience of illustration, the supply roller 71 under the second elastic nonwoven fabric 30 is not drawn. The lower shrinking roller 72 includes: a body 72a, which is cylindrical; The lower bonding roller 73 includes: a main body 73a, which is a column; a plurality of teeth 73b (convex surfaces) are arranged on the outer peripheral surface of the main body 73a parallel to each other at fixed intervals, and perpendicular to the longitudinal axis of the lower bonding roller 73 and the plurality of groove portions 73c (concave surfaces) are formed in the portion where the lower bonding roller 73 is not provided with the tooth portion 73b.

As shown in Figure 3, the middle supply roller 61, the upper supply roller 51, and the lower supply roller 71 supply the elastic material 10, the first elastic nonwoven fabric 20, and the second direction d2, the third direction d3, and the fourth direction d4 respectively. 2. Elastic non-woven fabric 30.

As shown in Fig. 3 and Fig. 4a, the upper shrinking roller 52 receives the first elastic nonwoven fabric 20 from the upper supply roller 51, so that the first elastic nonwoven fabric 20 enters the upper shrinking roller 52 along the third direction d3. Then, the first thread 52b and the second thread 52c of the upper shrinking roller 52 are symmetrically arranged, so that the upper shrinking roller 52 drives the first elastic non-woven fabric 20 to the center along the direction parallel to the upper shrinking roller 52 to shrink at a stable speed, so that The first elastic non-woven fabric 20 sinks into the gap between the groove portion 53c, the tooth portion 53b and the upper fin 54 of the upper laminating roller 53 without being stretched by external force, so that the first elastic non-woven fabric 20 is arranged in waves to form The regular wave folds make the first elastic non-woven fabric 20 shrink from the first natural width W1 to the first shrinkage width W3.

As shown in Fig. 3 and Fig. 4c, the lower shrinking roller 72 receives the second elastic nonwoven fabric 30 from the lower supply roller 71, so that the second elastic nonwoven fabric 30 enters the lower shrinking roller 72 along the fourth direction d4. Then, the first thread 72b and the second thread 72c of the lower shrinking roller 72 are arranged symmetrically, so that the lower shrinking roller 72 drives the second elastic non-woven fabric 30 to the center along the direction parallel to the lower shrinking roller 72 to shrink at a stable speed, so that The second elastic non-woven fabric 30 sinks into the gap between the groove portion 73c, the tooth portion 73b and the lower fin 74 of the lower bonding roller 73 without being stretched by external force, so that the second elastic non-woven fabric 30 is arranged inwardly in waves to form The regular wave folds make the second elastic non-woven fabric 30 shrink from the first natural width W1 to the first shrinkage width W3.

It should be noted that the rotation speeds of the upper supply roll 51 , the upper shrink roll 52 , the lower supply roll 71 and the lower shrink roll 72 are greater than the rotation speeds of the upper lamination roll 53 and the lower lamination roll 73 , thereby forming a speed difference. Due to this speed difference, the first elastic nonwoven fabric 20 and the second elastic nonwoven fabric 30 can be efficiently introduced between the upper fin 54 and the lower fin 74 .

Preferably, the distance between the adjacent teeth 53b of the upper laminating roller 53 and the distance between the adjacent teeth 73b of the lower laminating roller 73 can be adjusted, and/or the corresponding upper fin 54 and the lower The spacing between the fins 74 is adjustable, so that the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30 can have wave shapes with different heights as shown in Figures 6a to 6c, wherein the first elastic non-woven fabric 20 and the second elastic non-woven fabric The first shrinkage width W3 of the elastic nonwoven fabric 30 may be W3a, W3b, or W3c.

Then, as shown in Figure 3 and Figure 4b, the tooth portion 53b of the upper bonding roller 53 and the tooth portion 73b of the lower bonding roller 73 are respectively aligned and adjacent to each other, so that the tooth portion 53b of the upper bonding roller 53 and the lower bonding roller 53 are aligned. The contact portion of the tooth portion 73b of the closing roller 73 forms the first elastic non-woven fabric 20 with regular wave wrinkles for pre-shrinkage, the elastic material 10 supplied by the middle supply roller 61, and the fabric with regular wave wrinkles for pre-shrinkage. The second elastic non-woven fabric 30 is laminated to form the elastic composite non-woven fabric 1 . Finally, the winding roller 62 winds the laminated elastic composite nonwoven fabric 1 for collection, so as to roll the elastic composite nonwoven fabric 1 into a cylindrical shape.

Referring to Fig. 5d, it shows the elastic composite non-woven fabric 1 formed by laminating pre-shrunk elastic non-woven fabrics 20, 30 and elastic material 10 according to the present invention. The elastic composite non-woven fabric 1 provided by the present invention comprises: elastic material 10, which is a planar shape, and includes elastic film, elastomer non-woven fabric, or a combination thereof; and the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30, which pass through the waves Shrinking arrangement with regular wavy folds. Wherein, the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30 are pre-shrunk to form regular wave folds, and the respective wave folds are aligned with each other and are attached to the upper surface of the elastic material 10 in a symmetrical manner with respect to the elastic material 10. 11 and the lower surface 12.

Referring to Fig. 5a to Fig. 5f, they respectively show the states of the elastic non-woven fabrics 20, 30 and the elastic material 10 used in the present invention under various stretched, contracted or natural widths (the relative size relationship of various widths is also shown).

As shown in FIG. 5 a and FIG. 5 b , the natural width of the elastic non-woven fabric 20 , 30 is defined as a first natural width W1 , and the natural width of the elastic material 10 is defined as a second natural width W2 .

As shown in FIG. 5c (taking the elastic non-woven fabric 30 as an example), the elastic non-woven fabric 20, 30 is pre-shrunk to a width corresponding to the second natural width W2 of the elastic material 10, which is defined as the first shrinkage width W3.

Then, as shown in Figure 5d, the elastic non-woven fabrics 20, 30 are respectively pasted on the upper surface 11 and the elastic material 10 of the second natural width W2 in the state of being pre-shrunk to the first shrinkage width W3 and in a wavy state. The lower surface 12 forms an elastic composite non-woven fabric 1 . The natural width of the elastic composite nonwoven fabric 1 is defined as the third natural width W5. The elastic non-woven fabrics 20, 30 and the elastic material 10 have a plurality of bonding points P.

Afterwards, the elastic composite non-woven fabric 1 can be stretched, so that the elastic non-woven fabrics 20, 30 located on the upper surface 11 and the lower surface 12 change from a wave state (as shown in FIG. 5d ) to a flat state (as shown in FIG. 5e ), The width of the elastic composite nonwoven fabric 1 at this time is defined as the second stretched width W6. The second stretched width W6 is equivalent to the first natural width W1 of the elastic nonwoven fabric 20, 30 before being shrunk. In the process of stretching the elastic composite nonwoven fabric 1 from the third natural width W5 (as shown in Figure 5d) to the second stretched width W6 (as shown in Figure 5e), the tensile resistance of the elastic composite nonwoven fabric 1 is only determined by the elastic Material 10 provides and therefore exhibits low initial tension properties (ie, the elastic composite nonwoven is softer and easier to stretch during this process), a process hereinafter referred to as first stage stretching.

Next, the elastic composite non-woven fabric 1 can be continuously stretched, so that the elastic non-woven fabrics 20, 30 reach the actual limit stretching width, so that the elastic composite non-woven fabric 1 is stretched from the second stretching width W6 (as shown in FIG. 5e ) to Ultimate stretching width W7 (as shown in Fig. 5f), this process is referred to as the second-stage stretching below.

During the stretching of the elastic composite nonwoven fabric 1 from the second stretch width W6 (as shown in Figure 5e) to the ultimate stretch width W7 (as shown in Figure 5f), the elastic composite nonwoven fabric 1 is further stretched due to its elasticity. Stretching beyond the first stretching width W6, the elastic material 10 will not reach its ultimate stretching width, but the elastic composite nonwoven fabric 1 can be stretched to its ultimate stretching width W7. In other words, the weft limit stretch width W7 of the elastic composite nonwoven fabric 1 is equal to the weft limit stretch width W4 of the elastic nonwoven fabrics 20 and 30 , but smaller than the weft limit stretch width of the elastic material 10 .

Theoretically, the ultimate tensile width of the elastic composite nonwoven fabric 1 should be equal to the ultimate tensile width of the elastic nonwoven fabrics 20 and 30 . However, in fact, due to the lamination of the elastic material 10 and the elastic non-woven fabric 20, 30, part of the material will lose its extensibility. Therefore, the ultimate stretch width W7 of the elastic composite non-woven fabric 1 is only the theoretical limit of the elastic non-woven fabric 20, 30 About 90 to 95% of the stretched width (ie, the first stretched width W4).

When the elastic composite nonwoven fabric 1 is stretched from the second stretch width W6 (as shown in Figure 5e) to the ultimate stretch width W7 (as shown in Figure 5f), the tensile properties of the elastic composite nonwoven fabric 1 are determined by the elastic nonwoven fabric 20, 30 are provided with the elastic material 10 and thus will exhibit high recovery, high tensile properties (ie, less prone to stretching in the process, but easier to spring back).

At the same time, in this new model, since ordinary non-woven fabrics are heat-shrinked into extensible elastic non-woven fabrics 20, 30 (the first stage of shrinkage) through the heat-shrinking process, and then through the pre-shrinking step (for example, using the elastic compound of the new type) The non-woven fabric manufacturing equipment 40) shrinks the elastic non-woven fabrics 20, 30 into waves (the second stage of contraction), and then attaches the elastic non-woven fabrics 20, 30 to the elastic material 10 to form the elastic composite non-woven fabric 1, therefore, the elastic composite non-woven fabric 1 The natural width can be much smaller than the natural width of the elastic composite non-woven fabric in the prior art, so it can exhibit high extensibility and high resilience.

As for the resilience and deformation rate of the elastic composite nonwoven fabric 1, it depends on the type of the elastic material 10 used.

Preferably, the elastic film of the new elastic material 10 includes at least one of the following: polystyrene-based copolymer materials, including styrene-butadiene block copolymer (Styrene-Butadiene Block Copolymer), hydrogenated styrene- At least one of a Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS) and a Thermoplastic polyolefin elastomer (TPO); and a Thermoplastic polystyrene elastomer (Thermoplastic polystyrene elastomer, TPS).

As we all know, the above-mentioned thermoplastic polystyrene elastomer (TPS), also known as Styreneic Block Copolymers (Styreneic Block Copolymers), or SBCs for short, is currently the largest in the world and has the most similar properties to rubber. A thermoplastic elastomer. At present, there are mainly four types of thermoplastic polystyrene elastomer series, namely: styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer Copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS) and styrene-ethylene-propylene-styrene block copolymer (SEPS), while SEBS and SEPS are SBS and Hydrogenated copolymer of SIS.

Furthermore, the hard segment of thermoplastic polyolefin elastomer (TPO) is polyolefin materials such as polypropylene (PP) or polyethylene (PE), and the soft segment is rubber such as EPDM, It is generally formed by polymerization using metallocene as a catalyst, in which the hard segment and the soft segment are directly combined with a covalent chain, and it is also called M-POE.

Preferably, at least one of the first elastic nonwoven fabric 20 and the second elastic nonwoven fabric 30 of the present invention comprises polypropylene fiber (Polypropylene fiber), polyethylene fiber (Polyethylene fiber), and polylactic acid fiber (Poly Lactic Acid fiber) at least one of . Ordinary nonwoven fabrics made of the above ingredients can be formed into elastic nonwoven fabrics with an elongation rate of 50 to 200% after heat shrinking process.

Preferably, the elastic body non-woven fabric of the elastic material 10 of the present invention includes: 5 to 55 wt% of polymer material fibers as a base, which contains at least one of polypropylene (Polypropylene) and polyethylene (Polyethylene), and may be Spun-bonded, melt-blown or air-through non-woven fabrics; and 40 to 90 wt% of elastomers, wherein the elastomers include at least one of the following: polystyrene-based copolymer materials comprising styrene-butadiene block copolymers ( At least one of Styrene-Butadiene Block Copolymer), hydrogenated styrene-butadiene block copolymer (Styrene-Ethylene-Butylene-Styrene Block Copolymer, SEBS) and thermoplastic polyolefin elastomer (Thermoplastic polyolefin elastomer, TPO); And thermoplastic polystyrene elastomer (Thermoplastic polystyrene elastomer, TPS).

In the embodiment where the elastic non-woven fabric is used as the elastic material 10, the elastic composite non-woven fabric 1 can have two properties of elasticity and air permeability at the same time.

The first elastic nonwoven fabric 20 and the second elastic nonwoven fabric 30 of the present invention each have an elongation rate of 50 to 200%, that is, they can each be stretched to a width of 1.5 to 3 times its natural width.

In some embodiments, each of the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30 has a shrinkage range of 33.3% to 66.7%, that is, the respective widths of the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30 are 1/3 to 66.7% of their natural width after the wavy indentation arrangement. 2/3 times.

In some other embodiments, the respective shrinkage ranges of the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30 are 50% to 85%, that is, the respective widths of the first elastic non-woven fabric 20 and the second elastic non-woven fabric 30 are 0.15 to 85% of their natural width after being arranged in waves. 0.5 times.

Preferably, the elastic material 10 of the present invention has an elongation of 600 to 1300%, that is, it can be stretched to a width of 7 to 13 times its natural width.

In some embodiments, the elastic composite nonwoven fabric 1 of the present invention has an elongation rate of 250 to 800%, that is, it can be stretched to a width of 3.5 to 9 times its natural width.

In some other embodiments, the elastic composite nonwoven fabric 1 of the present invention has an elongation rate of 300 to 1000%, that is, it can be stretched to a width of 4 to 11 times its natural width.

3

9倍的寬度的潛力。然而，因為貼合時造成約5 %的延伸率損失，彈性複合不織布1在被拉伸至其自然寬度的8.55倍的寬度時即達到極限拉伸寬度W7（即，延伸率為755%）。 In an ideal embodiment, the elastic material 10 has an elongation of 900%, ie, can be stretched to a width that is 10 times its natural width. The elastic non-woven fabrics 20, 30 are bonded to maintain the (second) natural width W2 under the state of shrinkage range of 33.3% to 66.7% (that is, to be shrunk to a width 1/3 to 2/3 times of its natural width) The elastic material 10 means that in the first stage of stretching, the elastic composite nonwoven fabric 1 can be stretched to a width of at most 3 times its natural width. The elongation rate of the elastic nonwoven fabric 20, 30 is 50 to 200%, that is, it can be stretched to a width of 1.5 to 3 times its natural width, which means that in the second stage of stretching, the elastic composite nonwoven fabric 1 can be stretched to A width of at most 3 times its second stretched width. Thus in total the elasticized composite nonwoven 1 is stretched to at most 3 of its natural width.

3

9 times the width potential. However, due to the loss of elongation of about 5% during lamination, the elastic composite nonwoven fabric 1 reaches the ultimate stretched width W7 (ie, the elongation is 755%) when it is stretched to a width of 8.55 times its natural width.

2

4倍的寬度的潛力。然而，因為貼合時造成10%的延伸率損失，彈性複合不織布1在被拉伸至其自然寬度的3.6倍的寬度以後即達到極限拉伸寬度W7（即，延伸率為260%）。 In a more practical embodiment, the elongation of the elastic material 10 is 700%, ie, it can be stretched up to a width of 8 times its natural width. The elastic non-woven fabrics 20 and 30 are fitted to maintain the elasticity of the (second) natural width W2 under the state of shrinkage of 33.3 to 50% (that is, to a width that is shrunk to 2/3 to 1/2 times its natural width) The material 10, thereby forming the elastic composite nonwoven 1 having a (third) natural width W5, means that in the first stage of stretching, the elastic composite nonwoven 1 can be stretched to a width of at most 2 times its natural width. The elongation rate of the elastic nonwoven fabric 20, 30 is 50 to 100%, that is, it can be stretched to a width of 1.5 to 2 times its natural width, which means that in the second stage of stretching, the elastic composite nonwoven fabric 1 can be stretched to A width of at most 2 times its second stretched width. Thus in total the elastic composite nonwoven fabric 1 is stretched to 2 of its natural width.

2

Potential for 4x width. However, due to the loss of 10% elongation during lamination, the elastic composite nonwoven fabric 1 reaches the ultimate stretched width W7 (ie, the elongation is 260%) after being stretched to a width 3.6 times its natural width.

2

6倍的寬度的潛力。然而，因為貼合時造成10%的延伸率損失，彈性複合不織布1在被拉伸至其自然寬度的5.4倍的寬度以後即達到極限拉伸寬度W7（即，延伸率為440%）。 In a preferred embodiment, the elastic material 10 has an elongation of 700%, ie, can be stretched to a width that is 8 times its natural width. The elastic non-woven fabrics 20 and 30 are respectively bonded to maintain the (second) natural width W2 in a state where the shrinkage range is 50 to 66.7% (that is, to be shrunk to a width that is 1/2 to 1/3 times its natural width). The upper and lower surfaces 11, 12 of the elastic material 10, thereby forming an elastic composite nonwoven fabric 1 with a (third) natural width W5, which means that in the first stage of stretching, the elastic composite nonwoven fabric 1 can be stretched to its natural width Up to 3 times the width. The elongation rate of the elastic non-woven fabric 20, 30 is 100%, that is, it can be stretched to a width twice its natural width, which means that in the second stage of stretching, the elastic composite non-woven fabric 1 can be stretched to its second stretch. Stretch up to 2 times the width of the width. Thus in total the elastic composite nonwoven fabric 1 is stretched to 3 of its natural width.

2

Potential for 6x width. However, due to the 10% elongation loss caused by lamination, the elastic composite nonwoven fabric 1 reaches the ultimate stretched width W7 (ie, the elongation is 440%) after being stretched to a width 5.4 times its natural width.

Generally, the loss of elongation due to lamination is about 5 to 6% or 5 to 8%. But depending on the lamination density and the actual material used, the loss of elongation may be higher or lower.

In the process of being stretched to the limit stretching width W7, the elastic material 10 can provide elastic shrinkage force, so the elastic composite nonwoven fabric 1 can shrink back to about the (third) natural width W5. The degree of shrinkage recovery depends on the deformation rate of the elastic material 10 used.

For example, the original width of ordinary non-woven fabric is 200 cm, which forms elastic non-woven fabrics 20, 30 with (first) natural width W1 of 100 cm through heat shrinking process, therefore, elastic non-woven fabrics 20, 30 can be stretched to their natural Twice the width (that is, the width that can be stretched to the original width of ordinary nonwoven fabric), that is, 200 cm (that is, the elongation rate is 100%). When the elastic non-woven fabrics 20, 30 moved between the upper laminating roller 53 and the lower laminating roller 73 of the elastic composite non-woven fabric manufacturing equipment 40, the elastic non-woven fabrics 20, 30 were pre-shrunk to the first shrinkage width W3, i.e. 50 centimeters (i.e. , the shrinkage rate is 50%). At this time, the elastic non-woven fabrics 20 and 30 pre-shrunk to the first shrinkage width W3 (ie 50 cm) can be laminated with the elastic material 10 maintaining the second natural width W2 (ie 50 cm). After leaving the upper lamination roll 53 and the lower lamination roll 73 of the elastic composite nonwoven fabric manufacturing equipment 40, the formed elastic composite nonwoven fabric 1 has a third natural width W5, namely 50 cm.

90%

180公分）。同時，彈性材料10可提供彈性收縮力，因此，彈性複合不織布1可再收縮回復至（第三）自然寬度W5左右（即，約為50公分）。在此案例中，彈性複合不織布可由極限拉伸寬度180公分回復到自然寬度50公分（其為極限拉伸寬度的28%），具有極佳的回復性能。 It is worth noting that since the elastic non-woven fabrics 20, 30 are bonded to the elastic material 10 maintaining the natural width when the shrinkage range is 50% (that is, the pre-shrinkage is 1/2 times the natural width), and the elastic non-woven fabrics 20, 30 30 has an elongation of 100%, i.e., can be stretched to twice its natural width (while elastic material 10 has an elongation of 600%, i.e., can be stretched to 7 times its natural width), making elastic The composite nonwoven fabric 1 has the potential to be stretched to 4 times its natural width (2 times stretching can be provided during stretching from the first shrinkage width to the first natural width; During the stretching process of one stretching width, an additional 2 times stretching can be provided). However, due to the 10% elongation loss caused by lamination, the elastic composite nonwoven fabric 1 can only be stretched from its (third) natural width W5 (ie 50 cm) to the ultimate stretch width W7 (ie 200 cm

90%

180 cm). At the same time, the elastic material 10 can provide elastic shrinkage force, so the elastic composite non-woven fabric 1 can shrink back to about (third) natural width W5 (ie, about 50 cm). In this case, the elastic composite nonwoven fabric can recover from the ultimate stretch width of 180 cm to the natural width of 50 cm (which is 28% of the ultimate stretch width), which has excellent recovery performance.

Referring to Fig. 7, it shows a flow chart of the manufacturing method of the elastic composite nonwoven fabric of the present invention. The manufacturing method of the elastic composite non-woven fabric provided by the present invention includes a supplying step S10, a shrinking step S20, and a bonding step S30.

In the supplying step S10 , the first elastic nonwoven fabric, the elastic material, and the second elastic nonwoven fabric are respectively supplied through the upper supply roll 51 , the middle supply roll 61 and the lower supply roll 71 of the elastic composite nonwoven fabric manufacturing apparatus 40 . Specifically, make the elastic material move along the second direction while maintaining the second natural width W2 to supply the elastic material (for example, supply the elastic material into the elastic composite nonwoven fabric manufacturing equipment 40 of the present invention, and be bonded and the first and second elastic nonwovens are moved along the third direction and the fourth direction respectively to supply the first and second elastic nonwovens (for example, the first and the first The two elastic non-woven fabrics are respectively supplied to the upper shrinkage roll 52 and the lower shrinkage roll 72 of the elastic composite non-woven fabric manufacturing equipment 40 of the present invention).

The first elastic nonwoven fabric and the second elastic nonwoven fabric can be stretched to 1.5 to 3 times their natural width. The elastic material includes an elastic film, an elastic non-woven fabric, or a combination thereof.

The retracting step S20 may include a first retracting step S21 and a second retracting step S22. The first retracting step S21 and the second retracting step S22 are preferably performed simultaneously.

In the first retracting step S21, the first elastic non-woven fabric is arranged to be retracted in waves through the above-mentioned upper shrinking roller, upper laminating roller, and a plurality of upper fins to form regular wave folds. Specifically, the first elastic non-woven fabric is moved along the third direction, and the first elastic non-woven fabric is moved along the direction parallel to the shrinking roller at a stable speed by using the upper shrinking roller through the symmetrically arranged first and second threads. The center drives the contraction, so that the first elastic non-woven fabric falls into the grooves and teeth of the upper laminating roller and the cracks of the upper fins without being stretched by external force and advances smoothly, while turning to the same direction as the supply direction of the elastic material. Second direction to form regular wavy folds.

In the second retracting step S22, the second elastic non-woven fabric is arranged to be retracted in waves through the lower shrinking roller, the lower bonding roller, and the plurality of lower fins as described above to form regular wave folds. Specifically, the second elastic non-woven fabric is moved along the fourth direction, and through the symmetrically arranged first and second threads, the second elastic non-woven fabric is moved along the direction parallel to the shrinking roller at a stable speed by the lower shrinking roller. The center drives the contraction, so that the second elastic non-woven fabric sinks into the grooves and teeth of the lower fitting roller and the gap between the lower fins without being stretched by external force and advances smoothly, while turning to the same direction as the supply direction of the elastic material. Second direction to form regular wavy folds.

After the shrinking step S20, the first elastic nonwoven fabric and the second elastic nonwoven fabric shrink to the first shrinkage width W3 and sandwich the elastic material maintaining the second natural width W2, and move along the second direction.

In the laminating step S30, the first elastic composite non-woven fabric, the second elastic composite non-woven fabric, and the elastic material between them are moved along the second direction through the upper lamination roller and the lower lamination roller as described above. Clamping to bond the first elastic non-woven fabric, elastic material, and second elastic non-woven fabric to form a three-layer composite structure of the first elastic composite non-woven fabric-elastic material-second elastic composite non-woven fabric, and move to the second direction . Specifically, the teeth of the upper laminating roller and the teeth of the lower laminating roller are respectively aligned and adjacent to each other, so that the teeth of the upper laminating roller and the teeth of the lower laminating roller are in contact with each other through the first inner The first elastic non-woven fabric pre-shrunk in the shrinking step, the supplied elastic material, and the second elastic non-woven fabric pre-shrunk through the second shrinking step are extruded and bonded to form an elastic composite non-woven fabric; wherein, a plurality of upper fins and A plurality of lower fins are respectively inserted into the plurality of grooves of the upper lamination roller and the lower lamination roller, and in the non-contact area between the plurality of grooves, the first elastic non-woven fabric and the second elastic non-woven fabric are formed due to the upper and lower fins. Due to the existence of the slices, it slowly shrinks inwards to form a wave state.

In the manufacturing method of the elastic composite non-woven fabric of the present invention, the respective shrinkage ranges of the first elastic non-woven fabric after the first shrinkage step and the second elastic non-woven fabric after the second shrinkage step are 50 to 85%.

Preferably, in the manufacturing method of the elastic composite non-woven fabric according to the present invention, after the laminating step S30, a winding step S40 may be further included, driving the elastic composite non-woven fabric along the second direction, and winding to collect the formed elastic composite non-woven fabric , so that the elastic composite non-woven fabric is rolled into a cylindrical shape.

Preferably, in the manufacturing method of the elastic composite nonwoven fabric according to the present invention, by adjusting the spacing between the adjacent teeth of the upper fitting roller and the spacing between the adjacent teeth of the lower fitting roller, and/or Adjust the distance between the corresponding upper fins and lower fins to adjust the height or width of the wave folds of the first elastic non-woven fabric and the second elastic non-woven fabric. Specifically, by adjusting the positions of the upper and lower fins, the wave shape and shrinkage width of the first elastic non-woven fabric and the second elastic non-woven fabric can be changed.

Preferably, in the bonding step S30, the first elastic non-woven fabric, the elastic material and the second elastic non-woven fabric can be bonded by hot pressing or glue.

Preferably, in the laminating step S30, the first elastic non-woven fabric, the elastic material and the second elastic non-woven fabric are thermally melted and bonded together by heating the teeth made of metal.

Preferably, according to different fitting types, the teeth of at least one of the upper fitting roller and the lower fitting roller can be additionally provided with a plurality of convex points, so that the first elastic non-woven fabric, the elastic material and the second elastic non-woven fabric The bonding part (for example, the bonding point P shown in FIG. 5d ) is a plurality of points; or, in the case of no additional bumps, the bonding part may be in the form of a line.

Preferably, before the laminating step S30, the surface or the whole of the elastic material is coated with an adhesive (glue); and, in the laminating step S30, the first elastic non-woven fabric, The elastic material coated with the adhesive and the second elastic non-woven fabric subjected to the second shrinkage step S22 are extruded to form an elastic composite non-woven fabric.

Preferably, in the case of pasting by glue, the glue is usually sprayed directly on the surface of the elastic material by spraying glue, and then pasted with the pre-shrunk elastic non-woven fabric.

Preferably, the elastic material and the elastic non-woven fabric used in the manufacturing method of the elastic composite non-woven fabric according to the present invention can be respectively the elastic material 10 and the elastic non-woven fabrics 20 and 30 as mentioned above.

In order to verify the effectiveness of the new elastic composite nonwoven fabric, the composite nonwoven fabrics of Examples 1 to 6 and Comparative Examples 1 to 2 were prepared with the parameters listed in columns 2 to 7 of Table 1, and tensile tests were carried out.

In Table 1, the fin spacing refers to the spacing between the corresponding upper and lower fins on the I-I' plane, and the tooth spacing refers to the spacing between adjacent teeth of the bonding roller.

Examples 1 to 6 were prepared as described in the above-mentioned embodiments of the present invention, wherein, as shown in FIG. height in the vertical direction of Fig. 3 on the II' plane), a tooth spacing of 2.5 to 4 mm and a piece width of 10 cm (large pieces). For Examples 5 and 6, it was manufactured in the same manner as in Examples 3 and 4, except that half the width of the cut pieces (5 cm, small cut pieces) of Examples 3 and 4 were used, respectively.

Comparative Example 1 is a composite non-woven fabric of the prior art, wherein the elastic material is stretched using a clamp and bonded with the non-extensible upper and lower ordinary non-woven fabrics, and then the composite non-woven fabric is relaxed so that the elastic material retracts. And make ordinary non-woven fabric form wave crepe.

Comparative example 2 is another kind of composite nonwoven fabric of the prior art, in which, the water needle nonwoven fabric (Spunlace Nonwoven) prepared by high-pressure water column puncture is used as the upper and lower two pieces of nonwoven fabric (not extensible), and the nonwoven fabric is sprayed with glue and the elastic material of the middle layer After lamination, the activation step destroys the tissue of the non-woven fabric to make it extensible.

For Examples 1 to 6 and Comparative Examples 1 to 2, refer to the ASTM D3776 and ASTM D882 standard methods, use the following same conditions with a tensile testing machine (Lloyd LR5KPlus) and a load cell (Loadcells, XLC-0100-A1) Each material was tested.

150 mm（CD，緯向寬度），試片的緯向兩端的夾具尺寸為25 mm，由夾具夾住的試片部分不會被拉伸，因此實際進行拉伸的試片寬度為150

25

2

100 mm，即，對應大裁片的寬度10 cm。 For large pieces, the test piece size is 25 mm (MD, longitudinal width)

150 mm (CD, latitudinal width), the clamp size at both ends of the test piece in the latitudinal direction is 25 mm, the part of the test piece clamped by the clamp will not be stretched, so the actual stretched test piece width is 150 mm

25

2

100 mm, i.e. corresponds to a width of 10 cm for large pieces.

100 mm（CD，緯向寬度），試片的緯向兩端的夾具尺寸為25 mm，由夾具夾住的試片部分不會被拉伸，因此實際進行拉伸的試片寬度為100

25

2

50 mm，對應小裁片的寬度10 cm。 For small pieces, the test piece size is 25 mm (MD, longitudinal width)

100 mm (CD, latitudinal width), the size of the clamps at both ends of the test piece in the latitudinal direction is 25 mm, the part of the test piece clamped by the clamps will not be stretched, so the actual stretched test piece width is 100 mm

25

2

50 mm, corresponding to the width of the small piece 10 cm.

0，延伸率

0%）拉伸至達拉伸極限，即彈性材料及彈性複合不織布均斷裂為止（圖9至圖13中的曲線中止處）。拉伸速度為500 mm/min。測試結果為基於至少 5 個試片的平均值。 Tensile test method is: take the material from the natural state (the starting point of the curve in Figure 9 to Figure 13, the tensile force

0, elongation

0%) until the tensile limit is reached, that is, until both the elastic material and the elastic composite non-woven fabric are broken (the stop of the curve in Figure 9 to Figure 13). The stretching speed was 500 mm/min. Test results are average values based on at least 5 test pieces.

The tensile force used in the stretching process (that is, the tensile force on the material) and the corresponding elongation are plotted into the stress-strain curves shown in Figures 9 to 13, and each of the corresponding end points of the curve (ie, the tensile limit) The elongation and tensile force (recovery force) of the material are reported in columns 8 to 9 of Table 1. [Table 1] elastic material (elastic) non-woven fabric 1/2 fin pitch Tooth spacing (elastic) composite non-woven fabric Elongation Elongation Shrinkage Piece Width Elongation Resilience unit - - - mm mm cm - g/in Example 1 980% 200% 56.5% 1.6 4 10 461% 5506 Example 2 980% 200% 67.7% 3.5 4 10 657% 5518 Example 3 980% 200% 69.7% 1.6 2.5 10 635% 5503 Example 4 980% 200% 79.2% 3.5 2.5 10 946% 5509 Example 5 980% 200% 69.7% 1.6 2.5 5 317% 5513 Example 6 980% 200% 79.2% 3.5 2.5 5 473% 5511 Comparative example 1 980% - - - - 10 337% 4682 Comparative example 2 980% - - - - 10 234% 2835

It can be seen from the results in Table 1 that in Examples 1 to 6 of the present invention, the elongation of the elastic composite nonwoven fabric reaches the tensile limit is about 300 to 1000%, and the recovery force (pull force) is greater than 5500 g/in.

For Comparative Example 1, due to being limited by the production efficiency of the stretching fixture, the stretch ratio of the elastic material, and the non-extensibility characteristics of ordinary non-woven fabrics, the tensile resistance of this type of composite non-woven fabric is moderate, and the composite non-woven fabric reaches the tensile limit. The elongation can only reach 250 to 350%, and the recovery force is less than 5000 g/in.

For Comparative Example 2, because the original non-woven structure with tensile properties is destroyed, the recovery force of this type of composite non-woven fabric is only provided by elastic materials, and its tensile properties are usually not high, and the elongation of the composite non-woven fabric when it reaches the tensile limit is less than 250. %, the restoring force is less than 3000 g/in.

From the above results, it can be seen that the elongation and recovery force of the new elastic composite nonwoven fabrics (Examples 1 to 6) when they reach the tensile limit are significantly better than those of the prior art composite nonwoven fabrics (Comparative Examples 1 to 2).

In particular, referring to the results of Figure 12, it can be seen from the comparison results of Example 6 and Comparative Example 1 that Example 6 only needs half the width of the piece of Comparative Example 1, and can have a comparable (or even better) performance to that of Comparative Example 1. The elongation rate when reaching the ultimate tensile width shows that the new elastic composite nonwoven fabric only needs about half the width of the composite nonwoven fabric of the prior art to achieve similar or even better performance. In addition, referring to the results in FIG. 13 , the same conclusion as above can also be obtained through the comparison results of Example 6 and Comparative Example 2.

To sum up, the effect of this new model is that, for example, through the elastic composite non-woven fabric manufacturing equipment or manufacturing method, the two elastic non-woven fabrics are pre-shrunk to form a wave surface, and then the pre-shrunk two elastic non-woven fabrics are bonded together. on the upper and lower surfaces of the elastic material. Therefore, the elastic composite non-woven fabric of the present invention can have high elongation, high tensile strength and high recovery force, so that the surface of the elastic composite non-woven fabric will produce a certain degree of regular wave wrinkles.

Furthermore, since the elongation of the elastic composite non-woven fabric is greatly improved, users can use a smaller piece width. Therefore, in the factory building, the elastic composite nonwoven fabric of each cylindrical parent roll can be cut into more cylindrical small rolls of elastic composite nonwoven fabric, thereby improving production efficiency. Moreover, according to the elastic composite non-woven fabric of the present invention, a smaller piece width can be used to meet higher requirements for extension and recovery force, which can greatly improve comfort and covering performance.

In practical application, for the elastic composite non-woven fabric of the present invention, it only needs to use 1/2 to 1/3 of the width of the existing elastic composite non-woven fabric to meet the requirements of extension and recovery force. As a result, relatively less material is used in the end product, thereby reducing the use of packaging material, and reducing the volume of the product to maximize shipping efficiency (especially in bandage applications).

Moreover, due to the upper and lower fins of the adjustable device, the degree of shrinkage of the elastic non-woven fabric can be adjusted according to product requirements, so as to achieve the best balance between the extensibility and resilience of the elastic composite non-woven fabric, which can greatly improve the wearability of the application. Comfort and coverage.

The above-mentioned ones are only used to explain the preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Therefore, any modification or modification of the present invention under the same spirit of creation Changes should still be included in the intended protection category of the present invention.

1: Elastic composite non-woven fabric 10: elastic material 11: Upper surface 12: Lower surface 20: The first elastic non-woven fabric 30: Second elastic non-woven fabric 40: Elastic composite non-woven fabric manufacturing equipment 50: upper part 51: Upper supply roller 52: Upper shrink roller 52a: Ontology 52b: first thread 52c: second thread 53: Upper Laminating Roller 53a: Subject 53b: Tooth 53c: Groove 54: upper fin 54a: first end 54b: second end 54c: shoulder 60: Central 61: Medium supply roller 62: winding roller 70: lower part 71: Lower supply roller 72: Lower shrink roller 72a: Ontology 72b: first thread 72c: Second thread 73: Lower bonding roller 73a: Subject 73b: Tooth 73c: Groove 74: lower fin 74a: first end 74b: second end 74c: shoulder d1: the first direction d2: second direction d3: third direction d4: the fourth direction P: binding point S10: supplying step S20: retraction step S21: the first retraction step S22: the second retraction step S30: Fitting step S40: winding step W1, W2, W3, W4, W5, W6, W7: Width W1a, W1b, W1c: Width W3a, W3b, W3c: Width

Fig. 1 shows the tensile test result of the novel elastic material under different panel widths; Fig. 2 shows the schematic diagram of the process of preparing elastic non-woven fabrics with different elongations through thermal shrinkage used in the present invention; Fig. 3 shows the front view of the novel elastic composite nonwoven manufacturing equipment; Fig. 4 a shows the side view of the upper part of the novel elastic composite nonwoven fabric manufacturing equipment observed from the right side of Fig. 3; Fig. 4 b shows the sectional view of the middle part of the novel elastic composite nonwoven fabric manufacturing equipment taken along the line I-I' of Fig. 3; Referring to Fig. 4c, the side view of the lower part of the new elastic composite nonwoven fabric manufacturing equipment observed from the right side of Fig. 3 is shown; Figures 5a to 5f respectively show the states of the novel elastic material and elastic nonwoven fabric under various stretches, shrinkages or natural widths; Figures 6a to 6c show embodiments of elastic composite non-woven fabrics of different wave shapes respectively; Fig. 7 shows the flow chart of the manufacturing method of the novel elastic composite nonwoven fabric; Figures 8a to 8d show partial cross-sectional views of the middle part of the new elastic composite nonwoven fabric manufacturing equipment taken along the line II' of Figure 3 according to embodiments 1 to 4 of the present invention, wherein only one set of corresponding The groove portion, the ruler portion adjacent to the groove portion, and the corresponding fins; Fig. 9 shows the tensile test result of the elastic composite nonwoven fabric of the new embodiment 1 and 2; Fig. 10 shows the tensile test result of the elastic composite nonwoven fabric of the novel embodiment 3 and 4; Fig. 11 shows the tensile test result of the elastic composite nonwoven fabric of the novel embodiment 5 and 6; Fig. 12 shows the tensile test result of the composite nonwoven fabric of the novel embodiment 6 and comparative example 1; Fig. 13 shows the tensile test results of the composite nonwoven fabrics of Example 6 and Comparative Example 2 of the present invention.

1: Elastic composite non-woven fabric

10: elastic material

20: The first elastic non-woven fabric

30: Second elastic non-woven fabric

40: Elastic composite non-woven fabric manufacturing equipment

50: upper part

51: Upper supply roller

52: Upper shrink roller

53: Upper Laminating Roller

54: upper fin

54a: first end

54b: second end

54c: shoulder

60: Central

61: Medium supply roller

62: winding roller

70: lower part

71: Lower supply roller

72: Lower shrink roller

73: Lower bonding roller

74: lower fin

74a: first end

74b: second end

74c: shoulder

d2: second direction

d3: third direction

d4: the fourth direction

Claims (10)

An elastic composite non-woven fabric manufacturing equipment, comprising: An upper part is provided with an upper supply roller, an upper shrink roller, an upper laminating roller, and a plurality of upper fins; a middle section, provided with a middle supply roll and a take-up roll; and The lower part is provided with a lower supply roller, a lower shrinkage roller, a lower bonding roller, and a plurality of lower fins, among which The upper shrink roll and the lower shrink roll each comprise: a body, which is a column; A first thread and a second thread are provided on the body of the corresponding one of the upper shrinking roller and the lower shrinking roller and are centered with respect to the longitudinal axis of the corresponding one of the upper shrinking roller and the lower shrinking roller set vertically symmetrically; and The upper lamination roll and the lower lamination roll each comprise: a body, which is a column; A plurality of tooth portions are arranged parallel to each other at fixed intervals on the outer peripheral surface of the main body of the corresponding one of the upper and lower bonding rollers, and perpendicular to the corresponding one of the upper and lower bonding rollers. the longitudinal axis of one of; and A plurality of grooves are formed on a corresponding one of the upper lamination roller and the lower lamination roller where the teeth are not provided; and The upper fins and the lower fins each have a flat shape and include: A first end, pivotally fixed to the elastic composite non-woven fabric manufacturing equipment; a second end disposed in a corresponding one of the grooves; and a shoulder disposed between the first end and the second end; wherein the contours of the upper fins and the lower fins from the shoulder to the second end substantially match the contour of the outer peripheral surface of the main body of a corresponding one of the upper laminating roller and the lower laminating roller; and wherein The upper supply roller, the middle supply roller, and the lower supply roller respectively supply a first elastic non-woven fabric, an elastic material, and a second elastic non-woven fabric, The upper shrinking roller receives the first elastic non-woven fabric, and the first thread and the second thread of the upper shrinking roller are arranged symmetrically so that the first elastic non-woven fabric shrinks toward the center along a direction parallel to the upper shrinking roller, Make the first elastic non-woven fabric fall into the gaps between the grooves, the teeth and the upper fins of the upper laminating roller in a non-stretched state, and make the first elastic non-woven fabric shrink inwards in waves so that form regular wavy folds, The lower shrinking roller receives the second elastic non-woven fabric, and the first thread and the second thread of the lower shrinking roller are arranged symmetrically so that the second elastic non-woven fabric shrinks toward the center along a direction parallel to the lower shrinking roller, Make the second elastic non-woven fabric fall into the grooves and the teeth of the lower bonding roller and the gaps between the lower fins in a non-stretched state, so that the second elastic non-woven fabric is arranged in waves to form regular wavy folds, Wherein, the rotation speeds of the upper supply roller, the upper contraction roller, the lower supply roller and the lower contraction roller are greater than the rotation speeds of the upper lamination roller and the lower lamination roller, thereby forming a speed difference, the first elastic nonwoven fabric and The second elastic non-woven fabric is introduced between the upper fin and the lower fin due to the speed difference; The teeth of the upper bonding roller and the teeth of the lower bonding roller are respectively aligned and adjacent to each other, so that the teeth of the upper bonding roller and the teeth of the lower bonding roller The first elastic non-woven fabric that is pre-shrunk to form regular wavy wrinkles, the elastic material supplied by the middle supply roller, and the second elastic non-woven fabric that is pre-shrunk to form regular wavy wrinkles are pasted. combined to form an elastic composite nonwoven fabric, and The winding roll winds the elastic composite nonwoven fabric for collection. According to claim 1, the elastic composite non-woven fabric manufacturing equipment, wherein the upper fins and the lower fins are metal fins. Such as the elastic composite non-woven fabric manufacturing equipment of claim 1, wherein, The distance between the adjacent teeth of the upper laminating roller and the distance between the adjacent teeth of the lower laminating roller can be adjusted, and/or the distance between the corresponding upper fin and the lower fin is adjustable. Such as the elastic composite non-woven fabric manufacturing equipment of claim 1, wherein, Relative to the middle part, the upper supply roll, the upper shrink roll, the upper lamination roll, and the upper fins are respectively connected to the lower supply roll, the lower shrink roll, the lower lamination roll, and the lower fins. Slices symmetrical set. Such as the elastic composite non-woven fabric manufacturing equipment of claim 1, wherein, The upper supply roll, the upper contracting roll, the upper laminating roll, the middle supplying roll, the winding roll, the lower supplying roll, the lower shrinking roll and the lower laminating roll are arranged parallel to each other. An elastic composite non-woven fabric formed by laminating pre-shrunk elastic non-woven fabric and elastic material, including: An elastic material, which is a planar shape, and comprises an elastic film, an elastic non-woven fabric, or a combination thereof; and a first elastic non-woven fabric and a second elastic non-woven fabric, which are arranged in waves and have regular wavy folds, Wherein, the first elastic non-woven fabric and the second elastic non-woven fabric are pre-shrunk to form regular wavy folds, and the respective wavy folds are aligned with each other and are attached to the upper surface of the elastic material in a symmetrical manner with respect to the elastic material. and the lower surface, in, The natural width is defined as the width in its natural state without being stretched or contracted by external forces, Elongation is defined as the ratio of the elongation stretched from the natural width to the natural width, Shrinkage is defined as the ratio of the shrinkage of the first elastic non-woven fabric or the second elastic non-woven fabric to its natural width after undergoing wavy indentation from its natural width, in, The elongation of the first elastic nonwoven fabric and the second elastic nonwoven fabric is 50 to 200%, The shrinkage range of the first elastic non-woven fabric and the second elastic non-woven fabric is 50 to 85%, The elastic material has an elongation of 600 to 1300%. Such as the elastic composite non-woven fabric of claim 6, wherein, The elongation of the elastic composite non-woven fabric is 300 to 1000%. The elastic composite nonwoven fabric according to claim 6, wherein the elastic film comprises at least one of the following: Polystyrene-based copolymer materials, including styrene-butadiene block copolymer (Styrene-Butadiene Block Copolymer), hydrogenated styrene-butadiene block copolymer (Styrene-Ethylene-Butylene-Styrene Block Copolymer, SEBS ) and at least one of thermoplastic polyolefin elastomer (TPO); and Thermoplastic polystyrene elastomer (TPS). Such as the elastic composite non-woven fabric of claim 6, wherein, At least one of the first elastic nonwoven fabric and the second elastic nonwoven fabric contains at least one of polypropylene fiber, polyethylene fiber, and polylactic acid fiber. Such as the elastic composite nonwoven fabric of claim 6, wherein the elastic body nonwoven fabric includes: 5 to 55 wt% of polymeric material fibers comprising at least one of polypropylene (Polypropylene) and polyethylene (Polyethylene); and 40 to 90 wt% elastomer comprising at least one of the following: polystyrenic copolymer materials including Styrene-Butadiene Block Copolymer, hydrogenated Styrene-Butadiene At least one of block copolymer (Styrene-Ethylene-Butylene-Styrene Block Copolymer, SEBS) and thermoplastic polyolefin elastomer (TPO); and thermoplastic polystyrene elastomer (Thermoplastic polystyrene elastomer, TPS ).

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