Method of fabricating flame resisting blind fabric using recycled PET

Abstract

According to the present invention, a method for manufacturing a flame-retardant functional hybrid blind fabric using recycled PET material is provided, comprising a waste PET bottle collection and washing step (S100); a transparent waste PET bottle crushing step (S200); a transparent waste PET bottle melting step (S300); a PET recycled chip manufacturing step (S400); a PET recycled yarn manufacturing step (S500); a recycled yarn processing step (S600); a weaving step (S700); and a heat fusion step (S800).

Description

Technology Field

[0001] The present invention relates to a method for manufacturing a blind fabric using recycled PET material, and more specifically, to a method for manufacturing a blind fabric by producing a recycled PET resin, which is a recycled material, using waste PET resin such as PET bottles, which is a discarded resource, and then weaving a processed yarn having functional properties such as flame retardancy using the recycled PET resin. Background Technology

[0002] Efforts to reduce greenhouse gases for the preservation of the global environment are being pursued as policies, led by developed countries.

[0003] Consequently, global companies place great importance on environmental management and are paying close attention to the production of eco-products and eco-marketing to enhance national and brand images. In particular, developed countries such as those in Europe are mandating the use of recycled materials and recommending the priority consideration and use of textile materials produced using eco-friendly methods.

[0004] Among recycled materials, PET (polyethylene terephthalate) bottles, specifically transparent PET bottles, are the most valuable recycled materials among plastics. These transparent PET bottles can be reborn as high-quality recycled raw materials after the lids, labels, and foreign substances have been removed.

[0005] However, while the development of general PET fiber materials has achieved technological advancements in areas such as fine fibers, high sensitivity, and high functionality, the development of recycled PET raw materials for functional polymers has been somewhat stagnant. This is because the focus of recycled PET technology has primarily been on developing high-purity flakes by removing impurities during the recycling stage of waste PET bottles. Furthermore, although functional recycled PET is being developed through fragmentary R&D, the processes following the raw materials are not eco-friendly, resulting in a lack of environmental friendliness in the final products.

[0006] Therefore, there is a growing need to develop functionalized recycled PET materials to achieve the functionality required for finished products, and there is a necessity to develop high-value-added eco-friendly products that utilize eco-friendly processes throughout the entire process, from raw materials to finished products. Prior art literature

[0007] (Patent Document 0001) KR 10-2391881 B1(Patent Document 0002) KR 10-2599800 B1 The problem to be solved

[0008] The present invention was made to resolve the aforementioned problems, and the objective of the present invention is to provide a method for manufacturing blind fabric using recycled PET produced from waste PET, thereby expanding the scope of use of eco-friendly recycled resources, and also to provide a method for manufacturing a hybrid blind fabric having flame-retardant functionality using recycled PET. means of solving the problem

[0009] A method for manufacturing a flame-retardant functional hybrid blind fabric using recycled PET material according to the present invention to solve the above problem is,

[0010] Waste PET bottle collection and washing step for collecting and washing transparent waste PET bottles;

[0011] A step for crushing the above-mentioned washed transparent waste PET bottles;

[0012] A transparent waste PET bottle melting step for producing a waste PET melt by heating and melting the above-mentioned crushed waste PET bottles;

[0013] A PET recycled chip manufacturing step of introducing an additive containing a flame retardant into the above-mentioned waste PET melt, and manufacturing flame-retardant PET recycled chips by extrusion and cutting;

[0014] A PET recycled yarn manufacturing step for manufacturing flame-retardant functional PET recycled yarn by hot melting and spinning the above flame-retardant PET recycled chips;

[0015] A recycled yarn processing step for manufacturing an interlocking air composite yarn using a flame-retardant functional PET recycled yarn manufactured in the above recycled yarn manufacturing step;

[0016] A weaving step of weaving into a blind fabric form using a low-temperature fusion yarn (LM yarn) with a melting point of 80~120℃ as the warp yarn and an interlocking air composite yarn manufactured in the recycled yarn processing step as the weft yarn; and

[0017] The method is characterized by comprising a heat fusion step in which the woven fabric is heated to partially melt the warp threads and fuse the warp threads and the weft threads. The method is further characterized by comprising a heat fusion step in which the woven fabric is heated to partially melt the warp threads and fuse the warp threads and the weft threads, wherein, in the weaving step, the low-temperature fusion yarn (LM yarn) used as the warp thread is characterized by having a core-sheath structure in which the interior is made of flame-retardant recycled PET material and the exterior is made of biodegradable thermoplastic polyurethane (TPU) material. Effects of the invention

[0018] According to the present invention, since it is possible to manufacture blind fabrics that are consumed in large quantities by regenerating PET bottles, which are waste resources, there is an effect of promoting efficient recycling of resources.

[0019] In addition, according to the method of the present invention, by utilizing recycled resources and processing them into an interlocked air composite yarn having functionalities such as flame retardancy, and using this as a weft yarn, it is possible to manufacture a blind fabric having a unique texture and appearance along with functionality, thereby contributing to the high value-added production of recycled raw materials. Brief explanation of the drawing

[0020] FIG. 1 is a flowchart sequentially illustrating the steps of a method according to the present invention; FIG. 2 is a cross-sectional view of an example of a core-sheath type low-temperature fusion yarn used in the method of the present invention. Specific details for implementing the invention

[0021] Hereinafter, a method for manufacturing a flame-retardant functional hybrid blind fabric using recycled PET material according to the present invention will be described in more detail with reference to the attached drawings.

[0022] FIG. 1 is a flowchart illustrating the steps of a method according to the present invention in sequence. As shown in FIG. 1, the method according to the present invention basically comprises a waste PET bottle collection and washing step (S100); a transparent waste PET bottle crushing step (S200); a transparent waste PET bottle melting step (S300); a PET recycled chip manufacturing step (S400); a PET recycled yarn manufacturing step (S500); a recycled yarn processing step (S600); a weaving step (S700); and a heat fusion step (S800).

[0023] First, in the waste PET bottle collection and washing step (S100), waste PET bottles are collected, and among them, only transparent waste PET bottles are separated, then the caps, labels, and foreign substances are removed, and then they are washed and dried.

[0024] Washing is performed using a washing solution containing various cleaning components, which can remove contaminants such as adhesive components, volatile organic compounds, and residual beverages remaining on transparent waste PET bottles, and after washing by immersion at a temperature of 25 to 35°C for more than 10 minutes, the washing solution components are removed through a rinsing process.

[0025] In the step of crushing transparent waste PET bottles (S200), the washed transparent waste PET bottles are crushed to form flakes. Crushing can be performed using a known crusher, and known techniques can be utilized, and a specific description is omitted in this specification.

[0026] In the transparent waste PET bottle melting step (S300), the crushed waste PET bottles are heated and melted to produce a waste PET melt.

[0027] In the PET recycled chip manufacturing step (S400), an additive containing a flame retardant is added to the waste PET melt, and flame-retardant PET recycled chips are manufactured by extrusion and cutting.

[0028] In this step, the above-mentioned waste PET melt is transferred to an extruder, and while maintaining the temperature of the extruder at 180 to 200°C and the internal pressure at 20 to 23 kg / cm², a flame retardant and a foaming agent are introduced, and while transferring, the temperature is changed to 130 to 150°C and the pressure is adjusted to 70 to 80 kg / cm², and the material is transferred to a die, extruded, and cut to manufacture recycled PET chips.

[0029] Examples of the above flame retardants include inorganic flame retardants such as halogen compounds, phosphorus compounds, antimony compounds, and various metal hydroxides; however, in the present invention, it is preferable to use phosphorus-based flame retardants due to their low toxicity and eco-friendliness.

[0030] Examples of such phosphorus-based flame retardants include liquid or powder phosphate esters, triaryl phosphates such as triphenyl phosphate, pyrophosphate, phosphonates, metal-substituted phosphinates, phosphanates, and polyphosphazene-based flame retardants, as well as addition-type and condensation-type phosphorus-based polyester polymers and terminal-group synthetic-type phosphorus-based polyester polymers.

[0031] As the foaming agent, one or more selected from, for example, azodicarbonamide or stearyl monoglyceride may be used.

[0032] In the next PET recycled yarn manufacturing step (S500), the flame-retardant PET recycled chips are hot-melted and spun to manufacture flame-retardant functional PET recycled yarn.

[0033] At this time, some non-recycled polyester chips may be mixed and used, but there is no problem with spinning even if only flame-retardant recycled PET chips manufactured by the method described above are used. In addition, the spinning process for manufacturing recycled PET yarn using flame-retardant recycled PET chips can be carried out through a known PET yarn manufacturing process.

[0034] In the present invention, the fineness of the recycled PET yarn is approximately in the range of 100 to 500 denier, and preferably, yarn spun with a fineness of 150 to 300 denier is used.

[0035] Next, in the recycled yarn processing step (S600), an interlocking air composite yarn is manufactured using the flame-retardant functional PET recycled yarn produced in the recycled yarn manufacturing step.

[0036] The entangled air composite yarn is processed by passing the aforementioned recycled yarn through a place where strong compressed air is sprayed, while slowing the winding speed of the yarn compared to the speed of the yarn supplied from the air nozzle. As a result, some of the fibers are blown away by the air pressure, entangled, and form loops, thereby increasing the volume of the yarn and increasing its air content to give it characteristics similar to spun yarn.

[0037] In the present invention, since it is undesirable for blind fabrics to have excessive elasticity, such as sagging, an entangled air composite yarn is manufactured and used by means of air entanglement, which has a unique appearance effect by changing only the surface texture but does not increase elasticity.

[0038] Next, in the weaving step (S700), a low-temperature fusion yarn (LM yarn) with a melting point of 80 to 120°C is used as the warp yarn, and an interlocking air composite yarn manufactured in the recycled yarn processing step is used as the weft yarn to weave into a blind fabric.

[0039] At this time, for example, the above 50D low-temperature fusion yarn can be used as the warp yarn to have 1600 warp yarns and a warp density of 106, and the 300D / 96F recycled PET entangled air composite yarn can be used as the weft yarn to have a density of 110.

[0040] It was found that the fabric woven in this way transmits light in a single layer, but exhibits an excellent light-blocking effect when made into two layers.

[0041] Meanwhile, according to a preferred embodiment of the present invention, the low-temperature fusion yarn (LM yarn) (1) used as the warp is made of a core-sheath structure in which the interior is made of flame-retardant recycled PET material (10) and the exterior is made of biodegradable thermoplastic polyurethane (TPU) material (20), as shown in FIG. 2.

[0042] In this way, by using recycled PET material in the gradient as well, the overall proportion of recycled PET used can be increased, thereby enhancing resource recycling.

[0043] Finally, the flame-retardant functional hybrid blind fabric according to the present invention is completed by undergoing a heat fusion step (S800) in which the woven fabric is heated to partially melt the warp threads and fuse the warp threads and the weft threads.

[0044] By lowering air permeability through this fusion, thermal insulation and light blocking properties can be improved. By undergoing this heat fusion step, the coating step typically required in the manufacture of blind fabrics can be eliminated, thereby avoiding damage to texture, deterioration of tactile sensation, and environmental issues caused by coating solutions.

[0045] The heat fusion step can be performed by passing the material through a tenter or hot roller adjusted to a temperature of 130 to 180°C, which is the melting point of the low-temperature fusion material.

Claims

Claim 1 A waste PET bottle collection and washing step for collecting and washing transparent waste PET bottles; a transparent waste PET bottle crushing step for crushing the washed transparent waste PET bottles; a transparent waste PET bottle melting step for producing a waste PET melt by heating and melting the crushed waste PET bottles; a PET recycled chip manufacturing step for producing flame-retardant PET recycled chips by adding an additive containing a flame retardant to the waste PET melt and extruding and cutting; a PET recycled yarn manufacturing step for producing flame-retardant functional PET recycled yarn by hot melting and spinning the flame-retardant PET recycled chips; a recycled yarn processing step for producing an interlocking air composite yarn using the flame-retardant functional PET recycled yarn produced in the recycled yarn manufacturing step; and a weaving step for weaving into a blind fabric form using a low-temperature fusion yarn (LM yarn) with a melting point of 80~120℃ as the warp and the interlocking air composite yarn produced in the recycled yarn processing step as the weft. A method for manufacturing a flame-retardant functional hybrid blind fabric using recycled PET material, comprising a heat fusion step in which the woven fabric is heated to partially melt the warp and fuse the warp and weft yarns, wherein, in the weaving step, the low-temperature fusion yarn (LM yarn) used as the warp yarn is composed of a core-sheath structure in which the interior is made of flame-retardant recycled PET material and the exterior is made of biodegradable thermoplastic polyurethane (TPU) material. Claim 2 A method for manufacturing a flame-retardant functional hybrid blind fabric using recycled PET material, characterized in that, in the PET recycled chip manufacturing step according to claim 1, a phosphorus-based flame retardant is used as the flame retardant. Claim 3 delete

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