TWM565124U - Two-way elastic breathable material - Google Patents

Abstract

The present invention is a two-way elastic gas permeable material comprising a unidirectional elastic cloth and a bidirectional elastic film, wherein the unidirectional elastic cloth has a plurality of venting holes therethrough and has a latitudinal elongation, and the bidirectional elastic film is composed of a thermoplastic elastomer material It also has a plurality of venting holes therethrough and has an appropriate elongation in both the weft direction and the warp direction, wherein the upper surface of the bidirectional elastic film is completely conformed or partially adhered to the lower surface of the unidirectional elastic cloth. In particular, the two-way elastic film has a gas permeability of 17 to 25 cc/sec per square centimeter, and the two-way elastic gas permeable material has an overall gas permeability of 7 to 10 cc/sec per square centimeter. This creation has the advantages of two-way extension and breathability, and is suitable for use in close-fitting clothing or diapers to improve comfort and avoid sultry and humid.

Description

Bidirectional elastic breathable material

This creation relates to a two-way elastic breathable material, especially using at least one unidirectional elastic cloth with weft elongation to paste at least one two-way elastic film to achieve the characteristics of two-way strong resilience and high air permeability.

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 two-way elastic breathable material. The unidirectional elastic cloth with weft elongation is used to adhere to the two-way elastic film to achieve two-way elasticity and high air permeability. It is suitable for making intimate clothing or diapers, thereby solving the above-mentioned conventional technologies. All questions.

The main purpose of this creation is to provide a bidirectional elastic breathable material, including unidirectional elastic cloth and bidirectional elastic film. The unidirectional elastic cloth is made of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride. , Nylon, polycarbonate, polytetrafluoroethylene or polylactic acid, which has a plurality of through holes, and has an elongation of 150% to 400% in the weft direction, and the two-way elastic film is made of a thermoplastic elastomer material, For example, TPE-E / S / A, TPO, TPV or TPU, and has a plurality of through holes, and the upper surface of the two-way elastic film is fully or partially attached to the lower surface of the unidirectional elastic cloth. The bidirectional elastic film has a zonal elongation in the zonal direction and a warp direction elongation in the warp direction, wherein the zonal elongation and the warp direction elongation are between 100% and 300%. In particular, the permeability of the bidirectional elastic film is 17 to 25 cc / sec per square centimeter, and the overall permeability of the bidirectional elastic breathable material is 7 to 10 cc / sec per square centimeter. In addition, the ventilation holes of the bidirectional elastic film are aligned or misaligned ventilation holes of the unidirectional elastic cloth.

Although unidirectional elastic cloth has stretchable resilience only in the weft direction and no stretchable resilience in the warp direction, the two-way elastic film with weft and warp elongation is directly or indirectly bonded Unidirectional elastic cloth, so the overall unidirectional has a strong elastic tensile recovery force in the weft and warp directions. In addition, the unidirectional elastic cloth and the bidirectional elastic film are highly breathable, which is very suitable for the field of intimate clothing or diapers, improving comfort, and avoiding sweltering, moist, 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 bidirectional elastic breathable material according to the first embodiment of the present invention. As shown in the first figure, the bidirectional elastic breathable material of the first embodiment of the present invention includes a unidirectional elastic cloth 10 and a bidirectional elastic film 20, and the upper surface of the bidirectional elastic film 20 is fully or partially bonded to the unidirectional elastic The lower surface of the cloth 10 forms a multilayer structure having bidirectional elasticity. 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 unidirectional elastic cloth 10 is made of polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), and nylon (Nylon ), Polycarbonate (PC), polytetrafluoroethylene (PTFE), or poly lactic acid (PLA), can be a non-woven fabric, and has a plurality of air vents 12 that penetrate the upper surface of the unidirectional elastic fabric 10 and The lower surface, in particular, the unidirectional elastic fabric 10 has an elongation in the weft direction, and the elongation is preferably between 150% and 400%.

The bidirectional 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 (Thermoplastic polyamide, TPE-A), Thermoplastic Polyolefin (TPO), Thermoplastic Vulcanizate (TPV) or Thermoplastic Polyurethane (TPU), and has a plurality of air holes 22, which penetrates the elastic film 20 The upper and lower surfaces. The bidirectional elastic film 20 has a zonal elongation in the zonal direction and a warp direction elongation in the warp direction, wherein the zonal elongation and the warp direction elongation are between 100% and 300%, and in particular, the bidirectional elastic film The air permeability of 20 is 17 ~ 25 cc / sec.

In addition, the ventilation holes 22 of the two-way elastic film 20 can be aligned or misaligned with the ventilation holes 12 of the one-way elastic cloth 10, and the air permeability of the entire two-way elastic air-permeable material is specially designed to be 7 to 10 cc / cm 2. sec.

Furthermore, the upper surface of the bidirectional elastic film 20 and the lower surface of the unidirectional elastic cloth 10 can be directly laminated to a double-layer structure by ultrasonic fusion or thermal compression fusion, or alternatively, the bidirectional elastic film 20 and unidirectional The elastic cloths 10 are adhered by coating with an additional adhesive material (not shown). The adhesive material may be styrene / isoprene / styrene (SIS) or styrene / ethylene-butene. / Styrene (SEBS). Another way is to directly extrude the adhesive material to the unidirectional elastic cloth 10 to form a bidirectional elastic film 20, which can achieve the purpose of lamination at the same time.

More specifically, the unidirectional elastic cloth 10 can have a wavy surface in a local bulge area, which can greatly increase the surface area and expand the application field. At the same time, it can also improve the cotton feel and the thick feeling caused by the fluffy cloth surface.

Next, referring to the second figure, the schematic diagram of the bidirectional elastic breathable material in the second embodiment of the present invention is similar to the first embodiment. The main difference is that it additionally includes another unidirectional elastic cloth 30, which is also made of polyethylene, polypropylene, and poly. Styrene, polymethyl methacrylate, polyvinyl chloride), nylon, polycarbonate, polytetrafluoroethylene, or polylactic acid, and has a plurality of through holes 32 penetrating therethrough, and the top of another unidirectional elastic cloth 30 The surface is completely or partially attached to the lower surface of the bidirectional elastic film 20. Furthermore, the ventilation holes 32 of the other unidirectional elastic cloth 30 are the ventilation holes 22 of the aligned or misaligned bidirectional elastic film 20, that is, under the bidirectional elastic film 20 of the first embodiment.

The third figure is a schematic diagram of the bidirectional elastic breathable material in the third embodiment of the present invention, which is similar to the second embodiment, and the main difference is that it also includes another bidirectional elastic film 40, which is also composed of a thermoplastic elastomer material. The lower surface of the other two-way elastic film 40 is fully or partially attached to the upper surface of the one-way elastic cloth 10, and the other two-way elastic film 40 has a plurality of through holes 42 passing through it, which can be aligned or aligned with the single To the air holes 12 of the elastic cloth 10, it should be noted that the figure shows an example in which the air holes 12, air holes 22, air holes 32, and air holes 42 are aligned with each other, and another two-way elastic film 40, Since the unidirectional elastic cloth 10, the bidirectional elastic film 20, and the other unidirectional elastic cloth 30 are all bonded together, there is no wavy structure.

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 bidirectional elastic film is bonded to the unidirectional elastic cloth, it is processed into a mesh film with holes first, and then bonded to the unidirectional elastic cloth, which can also improve the air permeability.

In summary, the characteristics of this creation are that the unidirectional elastic fabric has resilience only in the weft direction, and the bidirectional elastic film has stretchable resilience in both the weft and warp directions, and the bidirectional elastic film can be directly or The unidirectional elastic cloth is indirectly bonded, thus forming an elastic breathable material with two-way resilience. In particular, the unidirectional elastic cloth and two-way elastic film have appropriate air permeability, which is very suitable for the fields of personal clothing, diapers, and sanitary products. Hygiene, comfort, avoid sweltering, damp and rash 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‧‧‧ one-way elastic cloth
12‧‧‧Ventilation hole
20‧‧‧Bidirectional elastic film
22‧‧‧Ventilation hole
30‧‧‧Another unidirectional elastic cloth
32‧‧‧Ventilation hole
40‧‧‧Another bidirectional elastic film
42‧‧‧Ventilation hole

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

Claims (6)

A bidirectional elastic breathable material includes: a unidirectional elastic cloth having a plurality of through holes, and is made of polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethyl methacrylate ( PMMA), polyvinyl chloride (PVC), nylon (Nylon), polycarbonate (PC), polytetrafluoroethylene (PTFE) or poly lactic acid (PLA), the unidirectional elastic cloth in a weft direction It has an elongation, which is between 150% and 400%; and a bidirectional elastic film, which is composed of a thermoplastic elastomer material and has a plurality of through holes, and the bidirectional elastic film has A zonal elongation and a meridional elongation, the zonal elongation and the meridional elongation are between 100% and 300%, and an upper surface of the bidirectional elastic film is completely fitted or Partially attached to the lower surface of the elastic cloth, wherein a permeability of the bidirectional elastic film is 17 ~ 25 cc / sec per square centimeter, and the ventilation holes of the bidirectional elastic film are aligned or misaligned with the elastic cloth For these vent holes, one permeability of the two-way elastic breathable material structure is Cm 7 ~ 10 cc / sec. According to the bidirectional elastic breathable material 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 bidirectional elastic breathable material described in item 1 of the scope of the patent application, wherein the upper surface of the bidirectional elastic film and the lower surface of the elastic cloth are bonded by an adhesive compound, the adhesive compound is styrene / isoprene Diene / styrene (SIS) or styrene / ethyl-butene / styrene (SEBS). According to the bidirectional elastic breathable material described in the first patent application scope, it further includes an another unidirectional elastic cloth, and an upper surface of the other unidirectional elastic cloth is fully or partially adhered to the bidirectional elastic film. Lower surface, and the other unidirectional elastic cloth is made of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride), nylon, polycarbonate, polytetrafluoroethylene or polylactic acid, It also has a plurality of through holes, and the through holes are the through holes aligned or aligned with the two-way elastic film. According to the bidirectional elastic breathable material described in item 4 of the patent application scope, it further comprises another bidirectional elastic film, and the lower surface of the other bidirectional elastic film is completely or partially bonded to a unidirectional elastic cloth. On the upper surface, the other bidirectional elastic film is composed of the thermoplastic elastomer material, and has a plurality of through holes, and the through holes are aligned or aligned with the through holes of the unidirectional elastic cloth. According to the bidirectional elastic breathable material described in item 5 of the scope of the patent application, one of the permeability of the other bidirectional elastic film is 17 to 25 cc / sec per square centimeter.