KR100736925B1 - Screen fabric for window shades and its manufacturing method - Google Patents

Abstract

A screen fabric for covering a window and a method for manufacturing the same are provided to give the rigidity to a surface of the screen fabric, by forming the screen fabric using a yarn, of which a sheath and a core are respectively formed of materials having different melting points. A screen fabric is woven by mix-spinning LM(Low Middling) yarns(1) and nonflammable yarns or arranging respective yarns as warp and weft. Each of the LM yarns has a structure of a sheath(11) and a core(12), wherein the sheath is formed of polyester having a low melting point and the core is formed of a general melting point. The screen fabric has LM yarns of 15-50 weight percents and nonflammable yarns of 85-50 weight percents. The screen fabric is heat-processed at a temperature of 200°C for 30-60 seconds to give the rigidity to a surface thereof.

Description

SCREEN FABRICS FOR COVERING A WINDOW AND MANUFACTURING METHOD THEREOF

1 is a cross-sectional view showing a cross-section of LM yarn which is one yarn constituting the screen fabric according to the present invention,

Figure 2 is a cross-sectional picture of the fabric heat-treated at 180 ℃ in accordance with an embodiment of the present invention,

Figure 3 is a cross-sectional picture of the fabric heat-treated at 200 ℃ in accordance with another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1 --- LM company

11 --- low melting polyester 12 --- regular polyester

The present invention relates to a screen fabric for window shades and a method for manufacturing the same. More specifically, it is easy to manufacture and excellent in flame retardancy, and stiffness is a characteristic required as a window shade without generating any toxic gas during combustion. The present invention relates to a screen cloth for excellent window shades and a method of manufacturing the same.

A screen is a type of window shade product that is generally used in homes, hotels, restaurants, and other buildings for privacy protection and sun protection. It is fixed to the window so that users can unwind the roll to cover the window or roll the roll to secure the view. This product is called roll roll, panel screen, vertical, etc. by cutting the fabric in the form of rolls and panels.

Screen fabric having the above characteristics was conventionally produced mainly by using the rear salt method. In other words, conventionally blended products such as polyester, T / C, T / R after weaving and mixing the flame retardant to the acrylic resin, coated with a roller and knife coating method to complete the drying method by coating the acrylic resin on the fabric to screen It has been used a method of imparting flame retardancy while preventing hard loosening of the physical property and the cut side of the cut side, which are physical properties for use. However, this conventional method often loses the texture of the original material by immersing or applying acrylic resin to the fabric, and sticks to each other in a roll state at a time of high humidity such as contamination and rainy season. It is easy to do, and there is a problem in that toxic gas is generated during combustion due to fire or the like, which is not environmentally desirable.

Therefore, the present inventors have completed the present invention by finding a method of imparting surface stiffness by heat treatment using yarns having different melting points of the center and the outer part as a result of intensive studies to solve the above-mentioned conventional problems. .

Accordingly, an object of the present invention is to provide a screen fabric having a rigid as a screen shader, without losing the original texture, no deformation due to temperature and humidity, excellent flame retardancy and does not generate toxic gas during combustion. It is to.

It is still another object of the present invention to provide a method for more effectively and easily manufacturing a window shader having the above characteristics.

The object of the present invention was achieved by providing a screen fabric that satisfies both rigidity and flame retardancy simultaneously by processing heat treatment by blending or weaving LM yarn and flame retardant yarns having different melting points in the central and outer portions at a predetermined ratio.

Window cloth screen fabric of the present invention for achieving the above object;

A yarn having a seed / core structure, wherein the yarn is a polyester having a low melting point and the core is a polyester having a general melting point. It is characterized in that it is obtained by heat treatment at a constant temperature by weaving by the method of mixing or arranging LM yarn (난) and flame retardant yarn.

According to another configuration of the present invention, the LM yarn (난) and flame retardant yarn is characterized in that used in 15 to 50% by weight to 50 to 85% by weight.

Method for producing a screen cloth for window shades to achieve another object of the present invention;

The seed part is made of polyester having a low melting point, and the core part is made of polyester having a general melting point so that each weight ratio is 1: 1. Preparing a yarn;

Weaving the LM yarn by blending or arranging the LM yarn with a flame retardant yarn having a LIO index (Limited Oxygen Index) of 28 or more; And

It is characterized in that it comprises a step of heat-treating the woven fabric at a temperature higher than the melting point of the low melting point polyester according to a known method.

According to another configuration of the present invention, the LM yarn is characterized in that it is selected from yarns or filaments.

In the case of the LM yarn according to the configuration of the present invention, for example, in the case of a spun yarn, the core portion of the polyester has a melting point temperature of about 255 ° C, and the seed portion has a melting point of about 120 ° C. The temperature is about 255 ° C. and the seed portion has a melting point of about 175 ° C. In the case of spun yarn, the flame retardant yarn and LM yarn are randomly distributed in the yarn. Therefore, in order to express the effect of stiffness of the fabric, the melting point should be relatively low at the same heat treatment temperature. There is also a problem that must rise together. In addition, it is preferable to keep the melting point difference between the core and the seed material at about 80 degrees, such as filament yarn, which is a core of the polymer having a glass transition temperature on the one hand in that the heat treatment temperature is higher than the melting point of the seed part. This is because the morphological stability of the minor ingredients may be impaired.

The flame retardant yarn used in the present invention is not limited to a specific one, and all kinds of flame retardant yarns having an LIO index of 28 or more may be used, and as a method for producing such a generally known flame retardant yarn, for example, a synthetic resin is melted into yarn in an initial state. In the manufacture of a flame retardant yarn consisting of stretching a yarn in an initial state of spinning after being cooled after being spun, a mixture of 86% by weight to 90% by weight of synthetic resin, polypropylene, magnesium hydroxide, tetrabrombibisphenol A, and polymer wax It consists of a mixture of 10 wt% to 14 wt% of a flame retardant, and a flame retardant for producing a flame retardant yarn in the form of particles of a flame retardant mixed with polypropylene, magnesium hydroxide, tetrabromobisphenol A, and polymer wax. Preparation step, the flame-retardant in the shape of the flame retardant preparation step and the synthetic resin of the particle state A material mixing step of stirring the mixture mixed with, the initial yarn manufacturing step of producing a yarn of the initial initial state by melting spinning the mixture of the material mixing step at 180 ℃ ~ 260 ℃, the initial yarn manufacturing step A cooling step of cooling the initial yarn to 15 ° C ~ 30 ° C, and a drawing step of stretching the initial yarn of the cooling step at a temperature state of 100 ° C ~ 200 ° C to produce a final yarn.

In addition to the flame retardancy, in addition to the flame retardancy, a screen absorber screen fabric woven by LM and flame retardant yarns may be used as an ultraviolet absorber such as benzotriazole-based or benzophenone-based or other conventional textile processing agents. have. Antistatic agents, water and oil repellents, antifouling agents, antibacterial agents, moisture absorbents, anti slip agents, and the like, which are generally used as other textile processing agents that may be used, may additionally be used, even if such commonly known processing agents are added. Of course, it is included in the scope of the present invention without departing from the spirit of the invention.
The window screening screen fabric of the present invention configured as described above can be woven in a manner that is mixed or arranged LM yarn and flame retardant yarn. Here, the term 'blend' refers to the spinning of the LM yarn and the flame retardant yarn. The 'array' does not mean the blending, but the LM yarn and the flame retardant yarn in the fabric are used as the diameter and weft yarn, respectively. It means to achieve. That is, the arrangement of the LM yarn and the flame retardant yarn at 1: 2 means that the LM yarn is made of LM yarn, flame retardant yarn, flame retardant yarn, LM yarn, flame retardant yarn, flame retardant yarn, and LM yarn. Wherein the LM yarn (사는) and flame retardant yarn is preferably used in 15 to 50% by weight to 50 to 85% by weight. When the LM is used in less than the above range has the disadvantage of reducing the rigidity effect on the fabric in the heat treatment step to be described later And, if it exceeds the above range there is a problem that the flame retardancy is relatively reduced.
The weaving completed fabric is subjected to a heat treatment step to give the rigidity of the physical properties required as the screen fabric at a predetermined temperature. As a result, the surface of the fabric is heat-treated, and the low melting point polyester of the LM's seed portion melts and flows to melt with other nearby LM and flame retardant yarns. By providing rigidity to the fabric, it gives rigidity to the fabric without using acrylic resin like the conventional method. Moreover, it does not lose the texture of the original fabric by not applying other materials such as acrylic resin. Strong durability against contamination and moisture In particular, in the conventional screen fabrics, environmentally undesirable materials such as acrylic resins are used, so toxic gases are generated during combustion due to fire, etc., which is not preferable. However, in the present invention, such materials are not used at all. Even if it does not generate toxic gas at all. In addition, according to the manufacturing method of the window shade screen fabric of the present invention can be more easily manufactured screen fabric having the above characteristics can reduce the number of steps of manufacturing the screen fabric, improve workability .

The heat treatment step is preferably carried out for 30 to 60 seconds at a temperature of about 200 degrees, the temperature is of course possible various changes depending on the temperature characteristics of the LM company used.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view showing a cross-section of LM yarn which is one yarn constituting the screen fabric according to the present invention. As shown in FIG. 1, LM yarn 1 according to the present invention is a filament yarn having a seed / core structure, and the seed portion is a low melting polyester 11 having a melting point temperature of 175 ° C., and the core portion is a general regular polyester 12 having a melting point temperature of 255 ° C. It is. The LM yarn and the flame retardant yarn shown in Figure 1 using a ratio of 30:70 blended or arranged in a way that the fabric was heat-treated for 1 minute at 180 ℃ and 200 ℃, respectively. The cross section of the resulting fabric was shown in FIGS. 2 and 3 by electron micrographs.

Figure 2 is a photograph of the fabric heat-treated for 1 minute at 180 ℃, Figure 3 is an electron micrograph of the fabric heat-treated for 1 minute at 200 ℃. As can be seen in Figure 2, when the fabric using a filament yarn used as a seed portion of the low melting point polyester 11 having a melting point temperature of 175 ℃ at 180 ℃ heat each part of the yarn is stuck but a certain portion It can be seen that, when the heat treatment at 200 ℃ can be seen that each yarn is completely melted. Therefore, the heat treatment temperature and time is not particularly limited, and the heat treatment temperature and time can be appropriately adjusted according to the degree of rigidity desired. Preferably, the treatment temperature is set higher than the melting point temperature of the low-melting point polyester, heat treatment by inversely adjusting the treatment temperature and the treatment time to obtain a fabric having a desired degree of rigidity.

Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to this Example.

Example 1

A seed / core structure filament yarn is used to prepare an LM yarn in which the seed portion is a low melting point polyester having a melting point temperature of 175 ° C., and the core portion is a general regular polyester having a melting point temperature of 255 ° C., and a flame retardant yarn having a LOI index of 30:10 The fabric was arranged by arranging at a ratio of. The woven fabric was heat treated at 200 ° C. for 30 seconds to obtain a window shade screen fabric.

Example 2

A screen fabric for window shade was obtained in the same manner as in Example 1 except that the use ratio of LM and flame retardant yarns was 20:80.

Example 3

A screen fabric for window shade was obtained in the same manner as in Example 1 except that the use ratio of LM yarn and flame retardant yarn was 40:60.

Example 4

A screen fabric for window shade was obtained in the same manner as in Example 1 except that the use ratio of LM and flame retardant yarns was 50:50.

Example 5

A screen fabric for window shade was obtained in the same manner as in Example 1 except that the use ratio of LM and flame retardant yarns was 60:40.

Example 6

A screen cloth for window shade was obtained in the same manner as in Example 1 except that the heat treatment time was 60 seconds.

Example 7

A screen fabric for window shade was obtained in the same manner as in Example 2 except that the heat treatment time was 60 seconds.

Example 8

On the warp, the filament yarn of the seed / core structure is made of LM yarn having a low melting point polyester having a melting point temperature of 175 ° C, and a core part having a general regular polyester having a melting point temperature of 255 ° C, and a flame retardant yarn having a LOI index of 1: 2. The yarns of the flame retardant yarns and LM yarns were mixed with the weft yarns, and the flame retardant yarns and LM yarn yarns were mixed, and the spun yarns were woven in a 1: 1 array to obtain a screen shader.

Example 9

Both warp and weft yarns were used as window shades to obtain a mesh product in which the flame retardant yarns and LM yarns specified in Example 1 were 2: 1 arranged.

Experimental Example

The stiffness of the screen fabric prepared in each of the above examples, which is suitable for use as a screen shader, was visually and tactilely evaluated. Also evaluated flame retardancy.

As a result, the fabric of Example 1 was excellent in flame retardancy, but showed insufficient rigidity to be used as a screen, and the fabrics of Examples 2 to 3 and Examples 6 to 7 were excellent in flame retardancy and exhibited a certain degree of rigidity, respectively. In Example 4, the rigidity was excellent but the flame retardancy was not satisfactory, and in Example 5, the flame retardancy was bad, and thus it was judged to be not preferable (see Table 1).
Item Yarn ratio (% by weight) Heat treatment (℃) Time (sec) Flame retardant Rigidity LM company Flame retardant Example 1 10 90 200 30 ○ X Example 2 20 80 ○ ○ Example 3 40 60 ○ ○ Example 4 50 50 △ ○ Example 5 60 40 X △ Example 6 10 90 60 ○ ○ Example 7 20 80 ○ ○

The window shader screen fabric of the present invention configured as described above is composed of LM yarn and flame retardant yarn only, and acrylic resin is not used, but it does not lose the texture of the original fabric while giving the desired rigidity to the fabric. It is strong against pollution and moisture, and does not generate toxic gas during combustion due to fire. In addition, according to the manufacturing method of the screen shade screen fabric of the present invention can more easily manufacture the screen fabric having the above characteristics can reduce the number of steps of manufacturing the screen fabric, can improve the workability It is a useful invention.

Claims (7)

A yarn having a seed / core structure, wherein the yarn is a polyester having a low melting point and the core is a polyester having a general melting point. Woven and flame retardant yarns are mixed or weaved by arranging each of the yarns in a weft yarn, wherein the LM yarn and the flame retardant yarn are used in an amount of 15 to 50% by weight to 50 to 85% by weight Screen fabric for window shades, characterized in that obtained by heat treatment for 30 to 60 seconds at a temperature of 200 ℃ to give rigidity to the surface of the fabric. The method of claim 1, When the LM yarn is a yarn with flame retardant yarn, polyester of the seed portion is a screen shader for the window shade, characterized in that the melting point temperature of 120 ℃. The method of claim 1, When the LM company is a filament yarn alone, the screen fabric for a window shade, characterized in that the melting point of the seed portion is 175 ℃. The seed part is made of polyester having a low melting point, and the core part is made of polyester having a general melting point so that each weight ratio is 1: 1. Preparing a yarn; Weaving the LM yarn by blending with a flame retardant yarn having a LIO index (Limited Oxygen Index) of 28 or more or arranging each yarn in a warp yarn; And Method of producing a screen shade screen fabric, characterized in that consisting of a step of heat-treating (Tenter) for 30 to 60 seconds at a temperature of 200 ℃ to give rigidity to the surface of the fabric. The method of claim 4, wherein The LM yarn (난) and flame retardant yarn 15 to 50% by weight of 50 to 85% by weight, characterized in that the manufacturing method of the screen shade screen fabric for window shades. The method of claim 5, When the LM yarn is a yarn of flame retardant yarn, polyester of the seed portion is a manufacturing method of the screen shade screen fabric for window shades, characterized in that the melting point temperature of 120 ℃. The method of claim 5, When the LM company is a filament yarn alone, the melting point of the seed portion manufacturing method of the screen shader for window shades, characterized in that.

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