TWM565125U - Multi-layer elastic breathable material structure - Google Patents

Abstract

The present invention is a multi-layer elastic permeable material structure comprising an elastic cloth and an elastic film, wherein the elastic cloth is composed of polylactic acid, has a plurality of venting holes penetrating therein, and has a latitudinal elongation, and the elastic film is composed of a thermoplastic elastomer. The material composition also has a plurality of venting holes penetrating, and the upper surface of the elastic film is completely fitted or partially attached to the lower surface of the elastic cloth. In particular, the elastic film has a gas permeability of 17 to 25 cc/sec per square centimeter, and the multilayer elastic gas permeable material has a gas permeability of 7 to 10 cc/sec per square centimeter. This creation has the advantages of latitudinal extension and breathability, and is suitable for use in close-fitting clothing or diapers to improve comfort and avoid sultry and humid.

Description

Multilayer elastic breathable material structure

This creation is about a multilayer elastic breathable material structure, especially using at least one polylactic acid elastic cloth with weft elongation to paste at least one elastic film to achieve high air permeability and strong resilience in the weft direction.

When considering the hygiene and safety of general sanitary products, they are usually used in a disposable or disposable manner to avoid contamination by germs or harmful substances, such as masks, disposable trousers, baby diapers or adult diapers. Because these products will be in contact with the skin for a period of time, the gas permeability requirements are more stringent to prevent discomfort or skin irritation, itching, and even rash caused by stuffiness or moisture.

Since the non-woven fabrics from plasticized materials have the advantages of being easy to manufacture, process, have good chemical resistance, durability and low cost, they have been widely used in many sanitary products. However, the non-woven fabric has poor extensibility. For applications that require wear, such as diapers, it causes inconvenience in use. Therefore, the industry has developed a non-woven fabric that can improve the extensibility, which can be called elastic non-woven fabric.

In conventional technology, a unidirectional tensile force is generally applied to the non-woven fabric, and then the fiber structure is destroyed. After the original force is released, the non-woven fabric naturally recovers and contracts to form a unidirectional elastically stretched elastic non-woven fabric.

In addition, the industry has also introduced multi-layer composite structures to enhance the elastic restoring force. Usually, the elastic film is sandwiched between the upper and lower layers of elastic non-woven fabrics to provide elastic band-like functions for easy wearing. However, the conventional technology has the disadvantage 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. Polylactic acid elastic cloth with weft elongation is used to adhere the elastic film to achieve high breathability. It also has strong resilience in the weft direction and is suitable for making intimate clothing or Diapers to solve all the problems of the conventional techniques described above.

The main purpose of this creation is to provide a multi-layer elastic breathable material structure, including an elastic cloth and an elastic film, wherein the elastic cloth is made of polylactic acid, has a plurality of through holes, and has an extension of 150% to 400% in the weft direction. The elastic film is made of thermoplastic elastomer material, such as TPE-E / S / A, TPO, TPV or TPU, and has a plurality of through holes, and the upper surface of the elastic film is fully or partially adhered. Fitted to 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 of the aligned or misaligned elastic cloth.

Because the elastic cloth has stretchable resilience only in the weft direction, there is no stretchable resilience in the warp direction, plus the elastic film can directly or indirectly fit the elastic cloth, so the elastic cloth is given a larger weft. Due to its reversibility, the overall multi-layer elastic breathable material structure has a strong elastic recovery force in the weft direction. In addition, the addition of elastic cloth and elastic film has the advantage of proper breathability, which is very suitable for use in the field of intimate clothing or diapers, improving comfort, and avoiding hot, humid and rash or itching.

The following is a more detailed description of the implementation of this creation with illustrations and component symbols, so that those skilled in the art can implement it after studying this manual.

Referring to the first figure, a schematic diagram of a multilayer elastic breathable material structure according to the first embodiment of the present invention is created. As shown in the first figure, the multi-layered 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 fully or partially attached to the bottom of the elastic cloth 10 On the surface, a double-layer stack structure is formed. There can be various implementations of the partial bonding described above to achieve local point bonding, grid bonding, strip bonding, etc. of the matrix arrangement, and the first figure shows an exemplary partial bonding. Instance.

Specifically, the elastic cloth 10 is made of poly lactic acid (PLA), may be a non-woven cloth, and has a plurality of ventilation holes 12. The elastic cloth 10 penetrates the upper surface and the lower surface of the elastic cloth 10. In particular, the elastic cloth 10 It has an elongation in the weft direction, and the elongation is preferably between 150% and 400%.

The aforementioned elastic film 20 is made of a thermoplastic elastomer material, such as a thermoplastic polyester (TPE-E), a thermoplastic polystyrenic block (TPE-S), and a thermoplastic polyamide (TPE -A), thermoplastic polyolefin (Thermoplastic polyolefin, TPO), thermoplastic vulcanizate (TPV) or thermoplastic polyurethane (Thermoplastic polyurethane, TPU), and has a plurality of ventilation holes 22, which penetrates the elastic film 20 Upper and lower surfaces. In particular, the air permeability of the elastic film 20 is 17 to 25 cc / sec.

In addition, the air holes 22 of the elastic film 20 can be aligned or misaligned with the air holes 12 of the elastic cloth 10, and the air permeability of the entire multi-layer elastic air-permeable material structure is specially designed to be 7-10 cc / sec per square centimeter. .

Furthermore, the upper surface of the elastic film 20 and the lower surface of the elastic cloth 10 may be directly laminated to a double-layer structure by ultrasonic fusion or thermal compression welding, or may be used between the elastic film 20 and the elastic cloth 10 Apply additional adhesive (not shown) for bonding, where the adhesive can be styrene / isoprene / styrene (SIS) or styrene / ethyl-butene / styrene (SEBS) . Another way is to directly extrude the adhesive material to the elastic cloth 10 to form the elastic film 20, which can achieve the purpose of lamination at the same time.

More specifically, when the elastic film 20 is partially adhered 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 fusion after retraction. In part, it will form a wavy surface bulge (as shown in the figure), which can greatly increase the surface area and expand the application area. At the same time, it can also improve the feel of cotton and the thick feeling caused by the fluffy cloth surface.

Next, referring to the second figure, the schematic diagram of the structure of the multilayer elastic breathable material in the second embodiment of this creation is similar to the first embodiment. The main difference is that it additionally includes another elastic cloth 30, which is also made of polylactic acid and has a penetration The upper surface of the other elastic cloth 30 is completely or partially adhered to the lower surface of the elastic film 20. Furthermore, the ventilation holes 32 of the other elastic cloth 30 are the ventilation holes 22 of the elastic film 20 aligned or misaligned, that is, under the elastic film 20 of the first embodiment.

The third figure is a schematic view of the structure of a multilayer elastic breathable material according to the third embodiment of the present invention. It is a four-layer structure including an elastic cloth 10, an elastic film 20, another elastic cloth 30, and another elastic film 40. 40 is also made 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 were not fully bonded. Similarly, another elastic film 40 has a plurality of through holes 42 which can be aligned or aligned with the through holes 22 and 32, and it should be noted that the figure shows the through holes 12, the through holes 22, The ventilation holes 42 and the ventilation holes 32 are examples aligned with each other.

The above-mentioned ventilation holes 12, ventilation holes 22, ventilation holes 32, and ventilation holes 42 can be achieved by using needle piercing and needling (Needle Punching). For example, passing through the needle wheel, because the needle on the needle wheel has high temperature, it can be pierced. The purpose is to form a vent hole with a circular ring hole, and the optimal air permeability can be adjusted by changing the hole diameter or the arrangement density. In addition, it can also be achieved by hot pressing. First, the entire multi-layer elastic breathable material structure is rolled through a set of upper and lower rollers with male and female lines, 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 the air permeability.

In summary, the characteristics of this creation are that the elastic cloth itself has stretchable resilience only in the weft direction, but does not have stretchable resilience in the warp direction, and the elastic film can directly or indirectly fit the elastic cloth. In addition, the elastic cloth is given a greater weft recovery property, and a multilayer elastic breathable material structure having elastic stretch in the weft direction is obtained. In particular, the elastic cloth and elastic film have appropriate breathability, so it is suitable for use in personal clothing. , Diapers, hygiene products, to improve comfort and avoid sweltering, moist, rashes or itching.

The above are only for explaining the preferred embodiment of the creation, and are not intended to restrict the creation in any form. Therefore, any modification or change related to the creation under the same spirit of creation , Should still be included in the scope of protection of this creative intention.

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

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

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 through the elastic cloth, the elastic cloth having an elongation in one weft direction, the extension The rate is between 150% and 400%; and an elastic film is made of a thermoplastic elastomer material and has a plurality of through holes, and an upper surface of the elastic film is completely or partially attached to the elastic film. 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 misaligned the air holes of the elastic cloth, the multilayer The air permeability 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 scope of the patent application, the thermoplastic elastomer material is a thermoplastic polyester (TPE-E), a 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 the first patent application range, wherein the upper surface of the elastic film and the lower surface of the elastic cloth are bonded by an adhesive compound, the adhesive compound is styrene / iso Pentadiene / styrene (SIS) or styrene / ethylene-butene / styrene (SEBS). According to the multilayer elastic breathable material structure described in item 1 of the scope of the patent application, it further comprises another elastic cloth, and an upper surface of the other elastic cloth is completely or partially attached to the lower surface of the elastic film. And the other elastic cloth is made of polylactic acid, and has a plurality of through holes, and the through holes are the through holes aligned or aligned with the elastic film. According to the multilayer elastic breathable material structure described in item 1 of the scope of patent application, it further comprises an elastic cloth and another elastic film, and an upper surface of the other elastic film is partially attached to the elastic film. Surface, and an upper surface of the other elastic cloth is partially adhered to a lower surface of the other elastic film, the other elastic film is made of the thermoplastic elastomer material and has a plurality of through holes, The other elastic cloth is made of polylactic acid and has a plurality of through holes. The holes of the other elastic film are aligned or aligned with the holes of the elastic film. The vent holes are the vent holes aligned or aligned with the other elastic film.