TWI764382B - Composite textile product - Google Patents

Abstract

The present disclosure provides a composite textile product, including a polyamide textile layer and a polyamide film. The polyamide film is bonded to the polyamide textile layer. The polyamide film has a pore size ranging from 10μm to 150μm.

Description

Composite textile products

The present invention relates to a textile product, in particular to a composite textile product which has moisture permeability and water resistance and conforms to environmental protection and economic benefits.

With the progress of the times, from simple knitted fabrics and woven fabrics to functional fabrics and environmentally friendly fibers developed in recent years, the gradually mature technology level has brought about the transformation of the traditional textile industry. With the rapid pace of high-tech research and development, textile Product quality improvement and multi-functionality have become important issues for technicians in this field to develop textile products.

Moisture wicking is the process of transferring vapor (such as moisture) or liquid (such as sweat) moisture from the skin to the outer surface of a garment and allowing it to evaporate. Therefore, moisture wicking is an important factor in maximizing wearer comfort during physical activity. The "moisture permeability" means that the vapor released by the body during exercise will penetrate through the pores of the film on the fabric, volatilize to the external environment to achieve the effect of cooling, and maintain excellent comfort and dryness.

In addition, "waterproof" refers to the ability of the fabric to resist the penetration of moisture from the external environment to the internal environment (such as skin). This fabric is usually made of polyurethane (polyurethane, PU), thermoplastic polyurethane (thermoplastic polyurethane, TPU) on the surface of the fabric. , Polytetrafluoroethylene (polytetrafluoroethylene, PTFE) and other materials are coated or laminated in the form of soft film. However, thermoplastic polyurethane (TPU) will deteriorate with time, and its interface strength is insufficient when it is laminated with different nylon fabrics, and the key raw materials come from abroad, so it is often unable to meet the domestic requirements for the production of high-end functional films. need.

In addition, the known moisture-permeable and waterproof textile materials (such as PU, TPU and PTFE) have the disadvantage that they cannot be recycled and are not environmentally friendly and economical. Causes harm to the environment and human body, and the environmental protection is not good. On the other hand, those skilled in the art have also encountered a bottleneck in the development of textile products with improved moisture permeability and water resistance. Therefore, if a composite textile product with excellent moisture permeability and water resistance, which is environmentally friendly and economical, can be developed, it will bring a considerable breakthrough to the technology in this field.

The object of the present invention is to provide a composite textile product. Compared with the prior art, the composite textile product of the present invention has excellent moisture permeability and water resistance, and the material of the composite textile product can be recycled and reused, which is environmentally friendly and economical.

Therefore, the present invention provides a composite textile product comprising a polyamide (polyamide, PA) fabric layer and a polyamide film layer. The polyamide film layer is bonded to the polyamide fabric layer, and the average pore size of the polyamide film layer is between 10 and 150 μm.

In one embodiment, the porosity of the polyamide film layer is between 10 and 20%.

In one embodiment, the thickness of the polyamide film layer is between 0.01 and 0.1 mm.

In one embodiment, the thickness of the polyamide fabric layer is between 0.1 and 0.3 mm.

In one embodiment, the polyamide film layer includes a copolymer material, and the copolymer material includes a polyamide segment and a polyether segment.

(I)。 R₁ 、R₂ 及R₃ 係分別為獨立之烴基，x、y、z為各自獨立的正整數。In one embodiment, the copolymer material has the structure of the following general formula (I):

(I). R ₁ , R ₂ and R ₃ are each an independent hydrocarbon group, and x, y and z are each an independent positive integer.

In one embodiment, the hydrocarbon group is a saturated straight-chain hydrocarbon group with a carbon number of 1-20, an unsaturated straight-chain hydrocarbon group with a carbon number of 1-20, a saturated branched-chain hydrocarbon group with a carbon number of 1-20, or a carbon number of 1 ~20 unsaturated branched chain hydrocarbon groups.

In one embodiment, the moisture permeability of the composite textile article is between 4,000 and 10,000 g/m ² /24 hrs.

In one embodiment, the water vapor transmission rate of the polyamide film layer is between 6,000 and 120,000 g/m ² /24 hrs.

In one embodiment, the hydrostatic head value of the composite textile article is between 30,000 and 32,000 mmH ₂ O.

In one embodiment, the bonding is performed by polyurethane reactive hot melt adhesives (PUR).

To sum up, the effect of the present invention is that when the composite textile product is in use, the first fluid (ie, water vapor) with water molecules will sequentially penetrate the polyamide film layer and the polyamide fabric layer to a the external environment, and the second fluid with water molecules (ie, liquid water) cannot penetrate the polyamide fabric layer and the polyamide film layer to an internal environment. Therefore, the composite textile product of the present invention has excellent moisture permeability and water resistance. Moreover, because the composite textile product of the present invention adopts the material of polyamide, it can be recycled and reused, which is in line with environmental protection and economic benefits.

Embodiments of the composite textile article according to the present invention will be described below with reference to the related drawings, wherein like elements will be described with the same reference signs.

The present invention provides a first embodiment, which is a composite textile product. The characteristics and physicochemical properties of the composite textile product of the present invention will be described below with examples and experimental examples.

Please refer to FIG. 1A , which is a schematic diagram of a composite textile product according to a first embodiment of the present invention. As shown in the figure, the composite textile product 1 includes a polyamide fabric layer 11 and a polyamide film layer 12 . The polyamide film layer 12 is bonded to the polyamide fabric layer 11 . The polyamide film layer 12 has a plurality of micro-holes, and the average pore diameter of the micro-holes ranges from 10 to 150 μm.

In this embodiment, the thickness of the polyamide fabric layer 11 is between 0.1 and 0.3 mm. For example, the thickness of the polyamide fabric layer 11 may be 0.15 mm, 0.2 mm, 0.22 mm, or 0.25 mm; the porosity of the polyamide film layer may be between 10 and 20%. In particular, the polyamide fabric layer 11 may be an article made of any nylon fiber. In addition, in this embodiment, the thickness of the polyamide film layer 12 may be between 0.01 and 0.1 mm. For example, the thickness of the polyamide film layer 12 may be 0.02 mm, 0.04 mm, 0.06 mm, or 0.08 mm. The polyamide film layer 12 and the polyamide fabric layer 11 can be bonded by reactive polyurethane hot melt adhesive (PUR), but the invention is not limited thereto.

Please refer to FIG. 1B , which is a schematic diagram of the composite textile product 1 shown in FIG. 1A in actual use. If the composite textile product 1 is a clothing for human body as an example, when the polyamide fabric layer is actually used, the polyamide film layer 12 of the composite textile product 1 is closer to the body surface of the human body wearing the clothing. In contrast, the polyamide fabric layer 11 of the composite textile product 1 is relatively far away from the body surface of the human body wearing the clothes, and is relatively close to the outside atmosphere. Therefore, the space outside the polyamide fabric layer 11 is defined as the external environment O, and the space between the polyamide film layer 12 and the body surface of the human body wearing the clothes is defined as the internal environment I.

The composite textile product 1 of this embodiment has the effect of moisture permeability. The human body surface will emit water vapor with water molecules due to active sweating, so when wearing the clothing made of the composite textile product 1, the internal environment I between the human body surface and the polyamide film layer 12 is phase Compared with the external environment O, its relative humidity is higher. Therefore, there is a pressure difference of water vapor between the internal environment I and the external environment O on the opposite sides of the composite textile product 1 (ie, the clothing worn by the human body). In this way, the water molecules in the water vapor (the first fluid F1 with water molecules) will pass through the micro-holes on the polyamide film layer 12 from the internal environment I with high relative humidity in sequence along the direction of the gray arrow. The polyamide film layer 12 and the polyamide fabric layer 11 are penetrated to the external environment O. In addition, the polyamide film layer 12 of this embodiment is also hydrophilic, so it can also transfer water molecules to the polyamide fabric layer 11 by diffusion after absorbing water molecules, and finally transfer the water molecules to the polyamide fabric layer 11 . Evaporate to ambient O to complete desorption.

Furthermore, the composite textile product 1 of this embodiment also has the effect of waterproofing. Rain or snow water in the external environment O (that is, the second fluid F2 with water molecules), its water molecules are liquid, so when wearing the clothes made of the composite textile product 1, the rain water or snow water cannot follow the white color. The direction of the arrow penetrates the micro-holes of the polyamide film layer 12 to the internal environment I. Therefore, the composite textile product 1 has a waterproof effect.

Furthermore, since the composite textile product 1 of this embodiment is made of polyamide, it can be recycled through physical or chemical methods, and re-processed into polyamide plastic pellets to meet the requirements of the back-end spinning, injection and other processes. Reuse and reduce waste discharge, which is conducive to ecological environment protection.

In addition, please refer to FIG. 1C , in another embodiment, the composite textile product 1 of this embodiment can also be matched with a fabric layer 2 with other functions, such as windproof or warm, according to the actual needs of the user or the manufacturer. Wait. As shown in FIG. 1C , the additional fabric layer 2 can be provided on the side of the polyamide film layer 12 away from the polyamide fabric layer 11 (ie, the side close to the internal environment I) as required. Alternatively, the additional fabric layer 2 can also be disposed on the side of the polyamide fabric layer 11 away from the polyamide film layer 12 (ie, the side close to the external environment O). In this embodiment, the material of the fabric layer 2 may not be polyamide, and the actual material thereof is also determined according to actual requirements, and the present invention is not limited herein. In addition, the arrangement method of the composite textile product 1 and the fabric layer 2 can also be gluing, stitching or fusion, etc. It is only necessary that the composite textile product 1 in the finished product after the setting still substantially retains its waterproof and moisture-permeable effect. The invention is also not limited herein.

In this embodiment, the hydrophilicity of the polyamide film layer 12 is derived from a copolymer material contained in the polyamide film layer 12 . As shown in FIG. 2 , the copolymer material is a nylon elastomer, including a polyamide segment 121 and a polyether segment 122 . That is, the copolymer material is structurally a polyether block amide (PEBA) compound formed by polymerizing polyamide and polyether. The polyamide section 121 has high rigidity (harder), so it has good wear resistance, chemical solvent resistance, high temperature resistance and other characteristics. The polyether segment 122 has relatively low rigidity (softer), so it has good properties such as moisture permeability, elastic recovery rate, and bending fatigue resistance. Therefore, the polyamide film layer 12 of this embodiment obtained by polymerizing polyamide and polyether through a film extrusion process has good elasticity; at the same time, the polyamide film layer 12 has polyamide The structure of the amine segment 121 has better abrasion resistance than the traditional TPU film. Therefore, the composite textile product 1 with the polyamide film layer 12 can meet the performance requirements of wear resistance, moisture permeability and waterproofness, fatigue resistance and bending resistance required by outdoor sports products. In addition, the above-mentioned polymerization reaction and film extrusion process can all use the process technology known to those skilled in the art, and will not be described in detail here.

(I)If expressed in chemical formula, the copolymer material of the polyamide film layer 12 has the following chemical formula (I):

(I)

In the aforementioned chemical formula (I), R ₁ , R ₂ and R ₃ are respectively independent hydrocarbon groups (such as alkyl, alkenyl and cycloalkyl), and x, y and z are positive integers. For example, the hydrocarbon group can be a saturated straight-chain hydrocarbon group with 1 to 20 carbon atoms (including but not limited to methane, ethane, n-propanyl, n-butanyl, n-pentyl, n-hexyl Alkyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n- tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, n-nonadecyl, n-eicosyl), carbon number 2~20 unsaturated linear hydrocarbon groups (including but not limited to vinyl, propenyl, propynyl, butenyl, butynyl, pentenyl, pentynyl, hexenyl, hexynyl, heptyl Alkenyl, heptynyl, octenyl, octynyl, and straight-chain alkenyl and straight alkynyl), saturated branched chain hydrocarbon groups with carbon number of 3~20 (including but not limited to isopropanyl, 1-methyl-1-propanyl, 2-methyl-1-propanyl, t-butanyl , or other branched alkyl groups with carbon numbers of 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20), or carbon numbers of 3~ 20 Unsaturated branched chain hydrocarbon groups (including but not limited to isopropenyl, 1-methyl-1-propenyl, 2-methyl-1-propenyl, 1-methyl-2-propenyl, 2-methylpropenyl Alkenyl-2-propenyl, or other branched alkenyl groups having 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 carbon atoms and branched chain alkynyl).

(II)

(III)As mentioned above, in this embodiment, the copolymer material is obtained by polymerizing polyamide and polyether, and the polyamide (PA) used may include but not limited to: PA6 (nylon 6) , PA11 (nylon 11), PA12 (nylon 12), PA46 (nylon 46), PA66 (nylon 66), PA610 (nylon 610), and PA612 (nylon 612); the polyether raw material used can be polyether resin ( polyether resin). The polyamide and polyether used may have the following chemical formula (II) and chemical formula (III), respectively:

(II)

(III)

The above R, R ₁ and R ₂ are respectively independent hydrocarbon groups (such as alkyl, alkenyl and cycloalkyl), and n is a positive integer. The selection and variation of R, R ₁ and R ₂ are the same as those of the aforementioned chemical formula (I), and are not repeated here.

Hereinafter, an experimental example of the composite textile product 1 of this embodiment will be provided to supplement the above description. However, it should be noted that the following description is used to describe the present invention in detail so that those skilled in the art can implement it, but are not intended to limit the scope of the present invention.

Experimental Example 1: Moisture permeability and waterproofness test of composite textile products

In this experimental example, the applicant takes the composite textile product for moisture permeability and water resistance tests, and the polyamide film layer for moisture permeability test. In particular, different countries have different moisture permeability measurement standards. For example, the moisture permeability measurement standard used in the United States (ASTM E96), the test data is g/m ² *24hr, and the setting conditions tend to be dry continental climates. It can be seen that the perspiration ability in sunny days, and the moisture permeability test standard (JIS L 1099) adopted in Japan, the test data is g/m ² *24hr, and the setting conditions are biased towards the humid island-type climate. Sweat ability, this experimental example was carried out in two ways. Moisture permeability is evaluated by water vapour permeability, and water repellency is evaluated by hydrostatic head test. The moisture permeability and water resistance test of composite textile products are entrusted to the National Notary Inspection Co., Ltd. to carry out. The samples used included a polyamide fabric layer (Sample No. WR-WNR0007) and a polyamide film layer (Sample No. EVO-20, with a weight average molecular weight (Mw) of 40,000 to 100,000 g/mol; the sample was of formula ( In II) R ₁ and R ₂ are independently mixed polyamides of hydrocarbon groups with a carbon number of 1 to 6, and R in the chemical formula (III) is an arbitrary mixed polyether of hydrocarbon groups with a carbon number of 1 to 6, The copolymer generated by the polymerization reaction, and then the film sample obtained by the subsequent pressing procedure), wherein the composition of the polyamide fabric layer includes 100% polyamide (134 strips/inch*70 strips/inch; 70 Dan*160 Dan). The sample treatment is to first perform water repellency treatment on the polyamide fabric layer, and then attach the polyamide fabric layer to the polyamide film layer in a lamination manner. The water vapor permeability evaluation was carried out using the ASTM E96 BW 2015 edition procedure (inverted cup method) (test temperature 23°C; relative humidity: 50%±3%; wind speed 0.1~0.2/sec). The sample is locked on the round cup and placed upside down on the round turntable in the testing machine (the membrane surface is in contact with the water). When the test sample is placed, take it out after one hour of test time, test the weight of water in the round cup, and then calculate the data as an indicator of moisture permeability (water vapor permeability). In addition, the applicant also used the JIS L 1099-2012 B1 method (potassium acetate upside down test) to evaluate the water vapor permeability of composite textile products (test temperature 23ºC, relative humidity 30±3%). Put the potassium acetate solution into the test cup to 2/3 volume, then fix it on the cup mouth with Teflon film, lock the test sample on the round cup, put water in the cup, and the membrane surface touches the water, and then put the sample cup on the cup. On the sample of potassium acetate (the cloth surface of the polyamide fabric layer 12 is in contact with the Teflon film). After 15 minutes of test time, test the weight of potassium acetate, and then calculate the data as an indicator of moisture permeability (water vapor permeability).

The hydrostatic head test (refer to JIS L 1092-2009, Section 7.1.2, method B, i.e. high water pressure test) is performed by locking the test sample in the test disc on the testing machine, and the polyamide film layer is With the membrane side up, the cloth surface of the polyamide fabric layer is in contact with water, and the water is poured into the disc at a fixed speed, and the pressure (water pressure) it can withstand is tested as an indicator of waterproofness. The experiment was repeated 5 times (the hydrostatic head values were 31,990 mmH ₂ O, 31,520 mmH ₂ O, 31,760 mmH ₂ O, 31,260 mmH ₂ O, and 31,570 mmH ₂ O), and the average values were calculated. The test results for the composite textile article are shown in Table 1 below. Table 1 Water Vapor Permeability (ASTM E96 BW 2015) Water vapor permeability (JIS L 1099-2012 B1) Average hydrostatic head value 4,130 g/m²/24 hrs 9,650 g/m²/24 hrs 31,620 mmH ₂ O

In addition, the moisture permeability test of the polyamide film layer is also carried out with reference to the aforementioned ASTM E96 BW 2015 version process (water cup upside down method) and JIS L 1099-2012 B1 method (potassium acetate upside down test), and the test results show that a single The moisture vapor transmission rate of the polyamide film layer is between 6,000 and 120,000 g/m²/24 hrs.

The results of this experimental example show that the composite textile product of this example has good moisture permeability and water resistance.

Experimental Example 2: Electron Microscopy Observation of Composite Textile Products

In this experimental example, the applicant took the polyamide film layer of the aforementioned composite textile product for electron microscope observation, in order to understand the pore size of the polyamide film layer. This experiment was commissioned by the Plastics Industry Development Center. The results of electron microscope observation are shown in FIGS. 3 and 4 . 3 and 4, it can be seen that the pore size of the polyamide film layer ranges from 11.42 to 149.6 μm. Therefore, the polyamide film layer can block the passage of liquid water molecules, but allow the passage of gaseous water molecules (water vapor).

To sum up, the composite textile product of this embodiment utilizes the polyamide fabric layer and the polyamide film layer, so that the first fluid (water vapor) with water molecules can penetrate the polyamide film layer and the polyamide film layer in sequence. The polyamide fabric layer to an external environment, and prevents the second fluid (liquid water, such as rain or snow water) with water molecules from penetrating the polyamide fabric layer and the polyamide film layer to an internal environment. Therefore, the composite textile product of this embodiment has excellent moisture permeability and water resistance, and since the composite textile product of this embodiment uses polyamide, it can be recycled and reused, which is environmentally friendly and economical.

The above description is exemplary only, not limiting. Any equivalent modifications or changes that do not depart from the spirit and scope of the present invention shall be included in the appended patent application scope.

1: Composite textile products 11: Polyamide fabric layer 12: Polyamide film layer 121: Polyamide segment 122: Polyether segment 2: Fabric layer F1: first fluid F2: second fluid O: External environment I: Internal environment

FIG. 1A is a schematic diagram of a composite textile product according to a first embodiment of the present invention. FIG. 1B is a schematic diagram of the composite textile product shown in FIG. 1A in use. FIG. 1C is a schematic diagram of another embodiment of the composite textile product shown in FIG. 1A . Figure 2 is a schematic view of the polyamide film layer of the composite textile product shown in Figure 1A. 3 is an electron microscope observation diagram of the polyamide film layer of the composite textile product of the present invention. 4 is another electron microscope observation view of the polyamide film layer of the composite textile product of the present invention.

1: Composite textile products

11: Polyamide fabric layer

12: Polyamide film layer

Claims (4)

A composite textile product, comprising: a polyamide fabric layer with a thickness of 0.1 to 0.3 mm; and a polyamide film layer bonded with the polyamide fabric layer, the polyamide film layer having hydrophilic properties , the average pore size is between 10 and 150 μm, the porosity is between 10 and 20%, and the thickness is between 0.01 and 0.1 mm, wherein the bonding is carried out by reactive polyurethane hot melt adhesive; wherein the polyamide film layer comprises There is a copolymer material, the copolymer material includes a polyamide segment and a polyether segment, and the copolymer material is a polyether block amide (polyether block) formed by the polymerization of polyamide and polyether in structure. amide (PEBA) compound, wherein the composite textile product is matched with a fabric layer disposed on the side of the polyamide fabric layer away from the polyamide film layer. The composite textile product of claim 1, wherein the composite textile product has a moisture permeability of between 4,000 and 10,000 g/m ² /24hrs. The composite textile product of claim 1, wherein the moisture permeability of the polyamide film layer is between 6,000 and 120,000 g/m ² /24hrs. The composite textile product of claim 1, wherein the composite textile product has a hydrostatic head value in the range of 30,000 to 32,000 mmH ₂ O.

Images