Manufacturing method of reusable biodegradable protective clothing fabric

Abstract

A method for manufacturing a reusable biodegradable protective clothing fabric according to one embodiment of the present invention comprises the steps of: preparing a biodegradable PLA yarn; manufacturing a fabric by knitting the PLA yarn in a tricot manner; introducing the fabric into a mangle device containing a zeolite processing agent to perform deep padding and then drying; and performing knife coating on one side of the fabric with a coating agent containing a biodegradable water-dispersible PUD and then drying.

Description

Technology Field

[0001] The present invention relates to a reusable biodegradable protective clothing fabric. Background Technology

[0003] Conventional protective clothing fabrics were manufactured using non-woven fabrics made of PP (polypropylene) synthetic fibers. While PP synthetic fibers offer excellent chemical resistance, fatigue resistance, and heat resistance, they had the problem of not decomposing semi-permanently.

[0004] In addition, the nonwoven fabric had a problem in that it was difficult to wash for reuse because it lacked shape stability, tear resistance, and puncture resistance due to being arranged in parallel or irregular directions.

[0005] Furthermore, while protective suits are designed to prevent the penetration of pathogens or viruses, the fabric itself was not endowed with separate antibacterial or antiviral properties. Consequently, there was a problem in that pathogens or viruses remained alive on the surface of the protective suit, posing a risk of infection when the suit was removed. The problem to be solved

[0007] The present invention is proposed to solve the aforementioned problem and aims to provide a method for manufacturing a reusable biodegradable protective clothing fabric.

[0008] Furthermore, it is evident that the technical challenges are not limited to those described above, and that other technical challenges may be derived from the following description. means of solving the problem

[0010] A method for manufacturing a reusable biodegradable protective clothing fabric according to one embodiment of the present invention comprises the steps of: preparing a biodegradable PLA yarn; manufacturing a fabric by knitting the PLA yarn in a tricot manner; introducing the fabric into a mangle device containing a zeolite processing agent to perform deep padding and then drying; and performing knife coating on one side of the fabric with a coating agent containing a biodegradable water-dispersible PUD and then drying.

[0011] In addition, the above-mentioned agent is characterized by comprising 1% by weight of the zeolite processing agent, 87% by weight of water, and 12% by weight of additives.

[0012] In addition, the zeolite processing agent is characterized by having silver (AG) or copper (Cu) supported on the zeolite.

[0013] In addition, the above mangle device is characterized by circulating the above medicine through a blend motor installed on one side.

[0014] In addition, the coating agent is characterized by comprising 58 to 62 weight% of the water-dispersible PUD and 38 to 42 weight% of water. Effects of the invention

[0016] The present invention has the effect of enabling not only washing but also natural decomposition when protective clothing is landfilled by knitting biodegradable PLA yarn using a tricot method and coating it with biodegradable water-dispersible PU. Additionally, the present invention has the effect of providing a fabric with antibacterial and antiviral properties by applying a zeolite processing agent to the fabric.

[0017] Furthermore, since the effects of the present invention described above are naturally manifested by the composition of the described content regardless of whether the inventor is aware of them, the aforementioned effects are merely a few effects based on the described content and should not be recognized as describing all effects that the inventor has grasped or that actually exist.

[0018] In addition, the effects of the present invention should be further understood from the overall description in the specification, and even if not explicitly stated, if an effect can be recognized as such by a person of ordinary knowledge in the technical field to which the described content belongs through the present specification, it should be considered as an effect described in the present specification. Brief explanation of the drawing

[0020] FIG. 1 is a drawing showing a method for manufacturing a reusable biodegradable protective clothing fabric according to one embodiment of the present invention. Figure 2 is a drawing showing PLA yarn being knitted in a tricot style. Figure 3 is a diagram showing the tissue structure of the tricot method. Figure 4 is a drawing showing deep padding and drying of a fabric knitted in a tricot style. Figure 5 is a diagram showing the characteristics of an inorganic antimicrobial agent. FIG. 6 is a drawing showing knife coating and drying performed according to one embodiment of the present invention. FIG. 7 is a drawing showing a fabric coated with a zeolite processing agent and a water-dispersible PUD according to one embodiment of the present invention. Figure 8 is a diagram showing PLA being hydrolyzed and destroyed. Specific details for implementing the invention

[0021] It should be noted that in assigning reference numbers to the components of each drawing in this specification, identical components are given the same number as much as possible, even if they are shown in different drawings.

[0022] Meanwhile, the meaning of the terms described in this specification should be understood as follows. Singular expressions should be understood to include plural expressions unless the context clearly defines otherwise, and terms such as "first," "second," etc. are intended to distinguish one component from another, and the scope of rights should not be limited by these terms. Terms such as "include" or "have" should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0023] The term “at least one” should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of “at least one of the first item, the second item and the third item” is not only the first item, the second item, or the third item individually, but also all combinations of items that can be presented from two or more of the first item, the second item, and the third item.

[0025] FIG. 1 is a drawing showing a method for manufacturing a reusable biodegradable protective clothing fabric according to one embodiment of the present invention.

[0026] As illustrated in FIG. 1, a method for manufacturing a recyclable biodegradable protective clothing fabric according to one embodiment of the present invention comprises the steps of preparing a biodegradable PLA yarn (S100), knitting in a tricot manner (S200), pretreatment and dyeing (S250), deep padding and drying (S300), and knife coating and drying (S400).

[0027] First, the step of preparing a biodegradable PLA yarn (S100) is a step of preparing a PLA yarn manufactured using corn as a raw material. Here, PLA means polylactic acid or polylactide, and the PLA yarn may be composed of 100% PLA.

[0028] The biodegradable PLA yarn prepared in the present invention has a thickness of 30 to 75 denier (De', Denier). The biodegradable PLA yarn according to the first embodiment of the present invention has the following specifications.

[0029]

[0030] Conventionally, PP (polypropylene) synthetic fibers are mainly used as yarns for protective clothing. Although PP synthetic fibers have excellent chemical properties against acids and bases and a melting point of about 170 degrees, resulting in excellent chemical resistance, fatigue resistance, and heat resistance, there was a problem in that they were not biodegradable and did not decompose semi-permanently when buried. Accordingly, the present invention manufactures a protective clothing fabric using biodegradable PLA yarns, thereby enabling it to decompose when buried, and furthermore, by knitting it using the tricot method described below, it is configured to have excellent chemical resistance, fatigue resistance, and heat resistance.

[0031] Next, in the step of knitting using the tricot method (S200), the prepared PLA yarn is knitted using the tricot method to manufacture the fabric.

[0032] Specifically, as shown in FIG. 2, PLA yarn can be prepared in a creel device, warped using a warping machine, and then knitted in a tricot manner using a tricot warp knitting machine to manufacture a fabric. Here, the tricot warp knitting machine can be prepared with 2 bar or 3 bar. FIG. 2 is a drawing showing the knitting of PLA yarn in a tricot manner.

[0033] The shaping conditions of the shaping operation according to the first embodiment of the present invention are as follows.

[0034]

[0035] The tricot knitting conditions according to the first embodiment of the present invention are as follows.

[0036]

[0037] Here, the tricot method is a method of creating loops in a zigzag shape by moving multiple warp threads simultaneously, and has a warp-knitted structure similar to that of a woven or knit fabric as illustrated in FIG. 3. FIG. 3 is a diagram showing the structure of the tricot method. Accordingly, the warp-knitted structure has a grid structure, and thus its shape stability and tear resistance are significantly higher than those of a nonwoven fabric structure.

[0038] Meanwhile, in the conventional case according to the present invention, a nonwoven fabric made of PP synthetic fibers was used as the fabric for protective clothing. Accordingly, an attempt was made to manufacture PLA yarn into a nonwoven fabric and use it as the fabric for protective clothing, but in the case of PLA yarn, the heat distortion temperature is 80 There were problems such as poor heat resistance, and weak fatigue resistance and strength.

[0039] In particular, in the case of nonwoven fabrics, the yarns are arranged in parallel or irregular directions, so they lack shape stability, tear strength, and puncture resistance, making it impossible to wash them for reuse.

[0040] Accordingly, the present invention overcomes the physical property limitations of existing nonwoven fabrics by knitting PLA yarns in a tricot manner, thereby enhancing shape stability, tear resistance, and puncture resistance, as well as enabling washing treatment for reuse.

[0041] Next, the pretreatment and dyeing step (250) is a step of pretreating and dyeing the knitted fabric.

[0042] Meanwhile, the pretreatment and dyeing conditions according to the first embodiment of the present invention are as follows.

[0043]

[0044] Next, the deep padding and drying step (S300) is a step of introducing the fabric into a mangle device containing a zeolite processing agent to perform dip padding and then drying.

[0045] Figure 4 is a drawing showing deep padding and drying of a fabric knitted in a tricot style.

[0046] As shown in FIG. 4, the mangle device contains a chemical agent, and after the fabric is immersed in the chemical agent through the mangle device, it is padded through a padding roller to apply the chemical agent to the fabric. Afterward, the fabric coated with the chemical agent is fed into a drying chamber and dried.

[0047] Here, the agent comprises 1% by weight of a zeolite processing agent, 87% by weight of water, and 12% by weight of additives. Here, the additives may include 10 parts by weight of a water repellent, 30 parts by weight of a dispersant, 20 parts by weight of a thickener, 2 parts by weight of an antifoaming agent, and 60 parts by weight of a nonionic binder.

[0048] The zeolite processing agent has silver (Ag) or copper (Cu) supported on the zeolite. In this case, the zeolite processing agent can be manufactured by coating the zeolite with copper or silver ions using an electroless plating method.

[0049] Zeolite exists in powder form as shown in Fig. 5, is insoluble in water, and can support up to 12% ions. Fig. 5 is a diagram showing the characteristics of an inorganic antimicrobial agent. Zeolite is microporous and has excellent physical adsorption and chemical cation exchange properties, so it has the characteristic of absorbing and adsorbing substances other than water, storing them, and then slowly releasing them.

[0050] Accordingly, the present invention provides the effect of not only imparting antiviral and antibacterial properties to the fabric by applying a zeolite processing agent loaded with silver or copper to the fabric, but also having excellent antiviral and antibacterial properties of the fabric, as the maximum loading amount of silver or copper is significantly higher than that of other inorganic antibacterial agents, as shown in FIG. 5.

[0051] In one embodiment, the mangle device can circulate the agent through a blend motor installed on one side when the fabric is immersed in the agent.

[0052] This is because, since zeolite is in powder form and does not dissolve in water, it sinks to the bottom of the mangle device; therefore, the agent is circulated through a blend motor to ensure that the zeolite processing agent is applied to the fabric.

[0053] Meanwhile, the deep padding and drying conditions according to the first embodiment of the present invention are as follows.

[0054]

[0055] Next, the knife coating and drying step (S400) is a step of knife coating one side of the fabric with a coating agent containing biodegradable water-dispersible PUD (Polyurethane Dispersion) and then drying. FIG. 6 is a diagram showing the knife coating and drying process according to an embodiment of the present invention. As shown in FIG. 6, the fabric is fed into a knife coating device, and when a coating agent containing water-dispersible PUD is fed between the knife and the roller, water-dispersible PUD is coated on one side of the fabric. Subsequently, the fabric coated with water-dispersible PUD is fed into a drying chamber and dried.

[0056] FIG. 7 is a drawing showing a fabric coated with a zeolite processing agent and a water-dispersible PUD according to one embodiment of the present invention.

[0057] As shown in Fig. 7, liquid penetration can be prevented as a water-dispersible PUD is coated on one side of the fabric. In addition, as a zeolite processing agent is applied to the yarn of the fabric, the fabric can have antiviral and antibacterial properties.

[0058] PLA yarn is biodegradable and therefore vulnerable to moisture. Fig. 8 is a diagram showing the hydrolysis and destruction of PLA. As illustrated in Fig. 8, PLA degrades due to structural destruction caused by the destruction of amorphous regions, where moisture penetration is relatively easy. Accordingly, the present invention prevents structural destruction of PLA by coating one side of the fabric with a water-dispersible PUD, thereby improving the durability of the fabric and preventing liquid penetration.

[0059] The coating agent according to the present invention comprises 58 to 62 weight% of water-dispersible PUD and 38 to 42 weight% of water. Preferably, the coating agent may comprise 60 weight% of water-dispersible PUD and 38% of water. In this case, as additives, it may further comprise aliphatic PU (Aliphatic Polyurethane), 2-butoxyethanol, 2-butanone oxime, ethyl methyl ketoxime, and ethyl methyl ketone oxime.

[0060] Here, the water-dispersible PUD may be composed of 44 to 46 parts by weight of aliphatic polyurethane (PU) and 54 to 56 parts by weight of water.

[0061] According to the first embodiment of the present invention, the knife coating and drying conditions are as follows.

[0062]

[0063] Physical performance test of protective clothing fabric The protective clothing fabric manufactured according to the first embodiment described above was tested according to the following specifications to determine whether it has Level D (type 5 & 6) performance.

[0065]

[0066] fabric knitted using the tricot method

[0067] The physical performance results of the fabric knitted in a tricot manner according to the first embodiment described above are as follows.

[0068]

[0069] Protective clothing fabric According to the first embodiment described above, the physical performance results of the fabric that has undergone the deep padding and drying step and the coating and drying step are as follows.

[0070]

[0071] As such, the protective clothing fabric according to the present invention not only has Level D (type 5 & 6) performance, but also has the effect of being reusable by being washable more than 10 times, and furthermore possesses antibacterial and antiviral properties. A person skilled in the art to which the present invention belongs will understand that the above-described present invention can be implemented in other specific forms without changing its technical concept or essential features.

[0072] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the invention.

Claims

Claim 1 A method for manufacturing a reusable biodegradable protective clothing fabric, comprising: a step of preparing a biodegradable PLA yarn; a step of manufacturing a fabric by knitting the PLA yarn in a tricot manner; a step of pre-treating and dyeing the manufactured fabric at a temperature of 120°C or lower; a step of introducing the fabric into a mangle device containing a chemical agent containing a zeolite processing agent to perform deep padding and then drying, wherein the chemical agent is continuously circulated through a blend motor installed on one side of the mangle device to prevent sedimentation of the zeolite processing agent; and a step of knife coating one side of the fabric with a coating agent containing a biodegradable aliphatic water-dispersible PUD (Polyurethane Dispersion) and then drying, wherein the coating agent comprises 58 to 62 weight% of the water-dispersible PUD and 38 to 42 weight% of water. Claim 2 A method for manufacturing a reusable biodegradable protective clothing fabric according to claim 1, wherein the above agent comprises 1% by weight of the zeolite processing agent, 87% by weight of water, and 12% by weight of an additive. Claim 3 A method for manufacturing a reusable biodegradable protective clothing fabric according to claim 1, wherein the zeolite processing agent is characterized by having silver (Ag) or copper (Cu) supported on the zeolite. Claim 4 delete Claim 5 delete

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