TW202003056A - Multilayer elastic breathable material structure including an elastic fabric and an elastic film - Google Patents

Abstract

The present invention is a multilayer elastic breathable material structure, which includes an elastic fabric and an elastic film, wherein the elastic fabric is made of polylactic acid and has a plurality of through ventilation holes and a weft elongation; and the elastic film is made of a thermoplastic elastomer and also has a plurality of through ventilation holes, an upper surface of the elastic film being completely adhered or partially adhered to a lower surface of the elastic fabric. Specifically, the air permeability of the elastic film is from 17 to 25 cc/sec for each square centimeter, and the air permeability of the multilayer elastic breathable material structure is from 7 to 10 cc/sec for each square centimeter. The present invention has the advantages of weft elongation and breathability and is suitable for use in intimate apparel or diapers, capable of improving comfort and avoiding sweltering and dampness.

Description

Multilayer elastic breathable material structure

The invention relates to a multi-layer elastic breathable material structure, in particular using at least one polylactic acid elastic cloth with latitude elongation to attach at least one elastic film to achieve high air permeability and strong resilience in the latitude direction.

When considering the hygiene and safe use of general hygiene products, one-time or disposable use is usually adopted to avoid contamination by germs or harmful substances, such as masks, laundry pants, baby diapers or adult diapers. Because these products will be in contact with the skin for a period of time, the requirements for breathability are stricter to prevent discomfort caused by hot or humid stuff, or skin irritation, itching, or even rash.

Due to the advantages of easy manufacturing, processing, good chemical resistance, durability and low cost, non-woven fabrics from plasticized materials have been widely used in many hygiene products. However, the non-woven fabric has poor extensibility, which may cause inconvenience in use for applications that need to be worn, such as diapers. Therefore, the industry has developed a non-woven fabric that can improve the extensibility, which can be called an elastic non-woven fabric.

In the conventional technology, the unidirectional tensile force is generally applied to the nonwoven fabric, and then the fiber structure is destroyed, and after the original force is released, it naturally recovers to contract and forms a unidirectional elastically extended elastic nonwoven fabric.

In addition, the industry has further introduced a multi-layer composite structure to enhance the elastic recovery effect. Usually, an elastic film is sandwiched between the upper and lower elastic non-woven fabrics to provide elastic band-like functions for easy wearing. However, the disadvantage of the conventional technology is that the elastic film itself has poor air permeability, which will cause the overall air permeability to be greatly reduced, which is not conducive to skin contact.

Therefore, there is a great need for an innovative multi-layer elastic breathable material structure, which uses a polylactic acid elastic cloth with a weft elongation to attach an elastic film to achieve high breathability, and also has strong resilience in the weft direction, suitable for making personal clothing or Diapers to solve all the problems of the above-mentioned conventional techniques.

The main purpose of the present invention is to provide a multi-layer elastic breathable material structure, including an elastic cloth and an elastic film, wherein the elastic cloth is composed of polylactic acid, has a plurality of penetrating holes, and has a 150% to 400% extension in the weft direction The elastic film is made of thermoplastic elastomer materials, such as TPE-E/S/A, TPO, TPV or TPU, and has multiple ventilation holes penetrating, and the upper surface of the elastic film is completely or partially attached Combined with the lower surface of the elastic cloth, in particular, the air permeability of the elastic film is 17-25 cc/sec per square centimeter, and the air permeability of the multilayer elastic breathable material structure is 7-10 cc/sec per square centimeter. In addition, the ventilation holes of the elastic film are the ventilation holes that are aligned or not aligned with the elastic cloth.

Since the elastic cloth has stretchable resilience only in the weft direction and no stretchable resilience in the warp direction, and the elastic film can directly or indirectly fit the elastic cloth, so the elastic cloth is additionally given a larger weft Recovery, so the overall multi-layer elastic breathable material structure has a strong elastic tensile recovery in the weft direction. In addition, the elastic cloth and elastic film have the advantages of proper air permeability, and are very suitable for application in the field of close-fitting clothing or diapers to improve the comfort and avoid the hot, humid and rash or itching.

The embodiments of the present invention will be described in more detail below with reference to icons and component symbols, so that those skilled in the art can implement them after studying this specification.

Referring to the first figure, a schematic view of the structure of the multilayer elastic breathable material according to the first embodiment of the present invention. As shown in the first figure, the multi-layer elastic breathable material structure of the first embodiment of the present invention includes an elastic cloth 10 and an elastic film 20, and the upper surface of the elastic film 20 is completely attached or partially attached to the bottom of the elastic cloth 10 On the surface, a double-layer stacked structure is formed. There may be various implementations of the above partial bonding to achieve local dot bonding, grid bonding, strip bonding, etc. of the matrix arrangement, and the first figure shows an exemplary partial bonding Examples.

Specifically, the elastic cloth 10 is composed of poly lactic acid (PLA), which may be a non-woven cloth, and has a plurality of vent holes 12 that penetrates the upper and lower surfaces of the elastic cloth 10, in particular, the elastic cloth 10 It has an elongation in the weft direction, wherein the elongation is preferably between 150% and 400%.

The above-mentioned elastic film 20 is composed of thermoplastic elastomer materials, such as thermoplastic polyester (Thermoplastic polyester (TPE-E), thermoplastic polystyrene block (TPE-S), thermoplastic polyamine (Thermoplastic polyamide (TPE-S) -A), Thermoplastic polyolefin (TPO), Thermoplastic vulcanizate (TPV) or Thermoplastic polyurethane (Thermoplastic polyurethane, TPU), and has a plurality of vent holes 22, which penetrate the elastic film 20 Upper surface and lower surface. In particular, the air permeability of the elastic film 20 is 17-25 cc/sec per square centimeter.

In addition, the ventilation holes 22 of the elastic film 20 can be aligned or not aligned with the ventilation holes 12 of the elastic cloth 10, and the breathability of the entire multilayer elastic breathable material structure is specially designed to be 7~10 cc/sec per square centimeter .

In addition, the upper surface of the elastic film 20 and the lower surface of the elastic cloth 10 can be directly bonded into a double-layer structure by ultrasonic welding or thermocompression welding, or can also be used between the elastic film 20 and the elastic cloth 10 Coat with additional adhesive compound (not shown), where the adhesive compound can be styrene/isoprene/styrene (SIS) or styrene/ethylene-butene/styrene (SEBS) . Another way is to directly extrude the adhesive compound onto the elastic cloth 10 to form an elastic film 20, which can achieve the purpose of bonding at the same time.

More specifically, when the elastic film 20 is partially attached to the elastic cloth 10 and stretched in the warp and weft directions, the permanent deformation rate of the elastic cloth 10 is greater than that of the elastic film 20, resulting in no ultrasonic welding after retraction. In part, a wavy surface bulge (as shown in the figure) can be formed, which can greatly increase the surface area and expand the application field. At the same time, it can also enhance the feel of cotton and the thick feeling caused by the fluffy cloth surface.

Next, referring to the second figure, a schematic view of the structure of the multilayer elastic breathable material in the second embodiment of the present creation is similar to the first embodiment, the main difference is that it additionally includes another elastic cloth 30, which is also composed of polylactic acid and has a through The plurality of ventilation holes 32, and the upper surface of the other elastic cloth 30 is completely attached or partially attached to the lower surface of the elastic film 20. Furthermore, the ventilation holes 32 of the other elastic cloth 30 are aligned or not aligned with the ventilation holes 22 of the elastic film 20, that is, under the elastic film 20 of the first embodiment.

The third figure is a schematic diagram of the structure of the multilayer elastic breathable material according to the third embodiment of the present invention, which is a four-layer structure including an elastic cloth 10, an elastic film 20, another elastic cloth 30 and another elastic film 40, in which another elastic film 40 is also composed of a thermoplastic elastomer material, and the elastic cloth 10, the elastic film 20, the other elastic film 40, and the other elastic cloth 30 are sequentially stacked from top to bottom. In addition, the layers are not completely bonded. Similarly, the other elastic film 40 has a plurality of ventilation holes 42 penetrating through it, which can be aligned or aligned with the ventilation holes 22 and the ventilation holes 32. It should be noted that the figure shows the ventilation holes 12, the ventilation holes 22, The air vent 42 and the air vent 32 are examples of alignment with each other.

The above-mentioned air vent 12, air vent 22, air vent 32, and air vent 42 can be achieved by needle piercing and needle punching (Needle Punching). For example, after passing through the needle wheel, the needle on the needle wheel can be pierced due to the high temperature of the needle The purpose is to form air holes with circular ring holes, and the best air permeability can be adjusted by changing the hole diameter or arrangement density. In addition, it can also be achieved by hot-press punching. First, the entire multilayer elastic breathable material structure is rolled through a set of male and female lines above and below the pressing wheel, and the high temperature is used to achieve the perforation effect. After that, it passes through a set of smooth surfaces Press the wheel to flatten the surface. Alternatively, before the elastic film is bonded to the elastic cloth, it is processed into a mesh film with holes, and then bonded to the elastic cloth, which can also improve breathability.

In summary, the characteristic of this creation is that the elastic cloth itself has stretchable resilience in the weft direction, but not stretchable resilience in the warp direction, and the elastic film can be directly or indirectly attached to the elastic cloth. In addition, the elastic cloth is provided with greater recovery in the weft direction, and a multi-layer elastic breathable material structure with elastic stretch in the weft direction is obtained. In particular, the elastic cloth and the elastic film have appropriate breathability, so they are very suitable for personal clothing , Diapers, sanitary products, to improve comfort, avoid sultry or itchy hot, humid.

The above are only for explaining the preferred embodiments of the present invention, and are not intended to limit the present invention in any form, so that any modifications or changes made to the present invention under the same spirit of the invention , Should still be included in the scope of protection of the present invention.

10‧‧‧Elastic cloth 12‧‧‧Ventilation hole 20‧‧‧Elastic film 22‧‧‧Ventilation hole 30‧‧‧Another elastic cloth 32‧‧‧Ventilation hole 40‧‧‧Another elastic film 42‧‧‧ Vent

The first figure shows a schematic view of the structure of the multilayer elastic breathable material according to the first embodiment of the present invention. The second figure shows a schematic view of the structure of the multilayer elastic breathable material according to the second embodiment of the present invention. The third figure shows a schematic view of the structure of the multilayer elastic breathable material according to the third embodiment of the present invention.

10‧‧‧Elastic cloth

12‧‧‧Ventilation holes

20‧‧‧Elastic film

22‧‧‧Ventilation holes

Claims (5)

A multi-layer elastic breathable material structure includes: an elastic cloth composed of poly lactic acid (PLA) and having a plurality of through-holes penetrating therethrough, the elastic cloth having an elongation in a weft direction, the extension The rate is between 150% and 400%; and an elastic film is composed of a thermoplastic elastomer material, and has a plurality of through-holes penetrating through, an upper surface of the elastic film is completely attached or partially attached to the The lower surface of the elastic cloth, and the air permeability of the elastic film is 17-25 cc/sec per square centimeter, wherein the air holes of the elastic film are aligned or not aligned with the air holes of the elastic cloth, the multi-layer The breathability of the elastic breathable material structure is 7~10 cc/sec per square centimeter. According to the multilayer elastic breathable material structure described in item 1 of the patent application scope, wherein the thermoplastic elastomer material is thermoplastic polyester (Thermoplastic polyester (TPE-E), thermoplastic polystyrene block (Thermoplastic polystyrenic block, TPE-S ), Thermoplastic Polyamide (TPE-A), Thermoplastic Polyolefin (TPO), Thermoplastic Vulcanizate (TPV) or Thermoplastic Polyurethane (TPU). According to the multi-layer elastic breathable material structure described in item 1 of the patent application scope, wherein the upper surface of the elastic film and the lower surface of the elastic cloth are bonded by an adhesive compound, which is styrene/iso Pentadiene/styrene (SIS) or styrene/ethylene-butene/styrene (SEBS). According to the multi-layer elastic breathable material structure described in item 1 of the patent application scope, further comprising another elastic cloth, an upper surface of the other elastic cloth is completely attached or partially attached to the lower surface of the elastic film, And the other elastic cloth is composed of polylactic acid, and has a plurality of ventilation holes penetrating through, and the ventilation holes are aligned or aligned with the ventilation holes of the elastic film. According to the multi-layer elastic breathable material structure described in item 1 of the patent application scope, it further includes another elastic cloth and another elastic film, and an upper surface of the other elastic film is partially attached to the lower side of the elastic film Surface, and an upper surface of the other elastic cloth is partially attached to a lower surface of the other elastic film, the other elastic film is composed of the thermoplastic elastomer material, and has a plurality of through holes penetrating through, The other elastic cloth is composed of polylactic acid and has a plurality of ventilation holes penetrating through, the ventilation holes of the other elastic film are aligned or aligned with the ventilation holes of the elastic film, the other of the elastic cloth The vent holes are the vent holes that are aligned or aligned with the other elastic film.

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