KR20080097040A - Method for manufacturing a buffering fabric and a buffering fabric thereby - Google Patents

Abstract

A buffer source shift improving the buffer nature is provided to maintain the long-term durability in the high temperature, not to cause the poor quality in product including the surface modification, damage, the solid line and etc. in the softening point, and to improve the buffer nature. A buffer source shift improving the buffer nature complete to mix the principal fiber metallic yarn 95-98wt% and the part fiber base metallic yarn 2-5wt%. The principal fiber metallic yarn is selected in the stainless yarn, the titan yarn, the steel yarn, the aluminium yarn. The part fiber base metallic yarn is selected in the buffer improving fiber group like the aramid fiber yarn, the carbonization fiber yarn, the phenol fiber yarn, the polybenzoxazole fiber yarn, the frame retardant fiber yarn. The heat-resistance temperature of the metallic yarn is 1000-1200°C. The heat-resistance temperature of the base metal yarn is 200-350°C.

Description

Method for manufacturing a buffer fabric and a buffer fabric by the method {Method for manufacturing a buffering fabric and A buffering fabric thereby}

1 is a schematic diagram showing an example of the use of a buffer fabric according to the present invention.

Explanation of symbols on the main parts of the drawings

11, 12: up and down 20: conveyance truck

30: heater 50: buffer fiber

The present invention is to fabricate a fabric using a heat-resistant composite yarn used in the process of shaping after heating to the softening temperature of the product in order to form a curved product, such as glass of automobiles, in particular a method of manufacturing a cushioning fabric and a cushioning fabric by the method It is about.

Currently, various types of textile products are used for parts and materials such as automobile seats and other interior materials, but metal knitted fabrics used in the molding process, which have the greatest impact on the quality of automotive glass products, are imported. I'm using.

For example, the front and rear glass of an automobile is a deep curvature with a small radius of curvature. The method of forming the sheet glass is to pass the heating furnace to heat the plate glass near the softening point, and to form the heated sheet glass using a heat-resistant fiber sheet. do. According to the type of each product, the press processing method and the gravity bending process using self weight are applied.

In the two molding processes, a knitted material made of a heat-resistant fiber material is used in order not to leave processing marks on the glass. However, in the past, glass fiber, carbon fiber, aramid fiber, metal fiber, etc. have been used, but aramid fiber has a heat resistance problem, glass fiber has a heat resistance, a buffer (cushion) and glass fiber adheres to the glass plate, carbon made of filament Fiber is also rarely used at present due to bufferability (cushionability), and knitted fabrics composed of metal fiber spun yarn having excellent heat resistance, bufferability (cushionability), product quality and durability are preferred.

Representative overseas companies that manufacture and sell textiles, knitted fabrics, and non-woven products using metal fibers include BEKAERT, Belgium, Japan, Japan, and FILTEC, Germany.

BEKAERT manufactures metal fibers with a thickness of about 1-20㎛ by BUNDLE DRAWING and uses electromagnetic shielding materials, antistatic materials, heat-resistant buffer materials, heating materials, gas burner mat materials, intelligent materials, etc. To supply. In Japan, the company manufactures metal fibers with a thickness of about 6-80㎛ by Bundle Drawing, and processes them into metal filaments, metal fabrics, and metal knitted fabrics. It is used as a heat-resistant buffer material. FILTEC manufactures metal spinning yarns and metal fabrics / knitting fabrics by spinning, weaving and knitting processes using metal fibers from BEKAERT, and supplies them to heat-resistant buffer materials used in the glass industry. In Korea, Fibertech manufactures metal fibers with a thickness and a predetermined length of about 30-80 μm using the vacuum melting and rapid cooling disc system (Vacuum Melting & Rapid Cooling Disc System).

However, when manufacturing knitted fabrics made of metal fiber spun yarns and forming them for automobile curved glass and aluminum curved plates, to prevent molding defects, it is necessary to maintain a small amount of fuzz, high strength and uniformity in addition to heat resistance, buffer resistance, and durability. It is urgently needed.

Accordingly, the present invention not only maintains long-term durability at high temperatures when reshaping metals, plastics, and glass having a softening temperature not exceeding 800 ° C., but also does not cause deterioration of quality such as surface deformation, breakage, and solid lines at the softening temperature. It is an object of the present invention to provide a method for producing a buffer fabric.

Still another object of the present invention is to provide a buffer fabric having improved bufferability in the above manner.

In order to achieve the above object, a method of manufacturing a buffer fabric according to one aspect of the present invention includes a method of manufacturing a buffer fabric composed of metal fibers: 95-98 wt% of a main fiber yarn and 2-5 wt% of a nonmetallic yarn of sub-fiber yarn. The main fiber yarn is selected from stainless yarn, titanium yarn, steel yarn, aluminum yarn, etc., and the subfiber yarn is aramid fiber yarn, carbide fiber yarn, phenolic fiber yarn, PBO (Polybenzoxazole). ) It is selected from the group of buffer-enhancing fibers such as fiber yarn, FR (Frame Retardant) fiber yarn, and is formed to maintain a predetermined heat-resistant temperature range by adding a weaving process with subfiber yarn together with the spinning process of the main fiber yarn. do.

As another feature of the present invention, the heat resistance temperature of the metal yarn 1000-1200 ℃ non-metallic heat-resistant temperature of 200-350 ℃ when the mixed molding is maintained in a temperature range of 400-600 ℃.

In another aspect of the present invention, there is provided a buffer fabric, characterized in that produced by the method of claim 1 or 2.

On the other hand, the terms or words used in the present specification and claims are not to be construed as limiting the ordinary or dictionary meanings, the inventors should use the concept of the term in order to explain the invention in the best way. Based on the principle that it can be properly defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing an example of the use of a buffer fabric according to the present invention.

The work W of the plate glass is heated to the vicinity of the softening point while passing through a plurality of heaters 30 on the conveyance trolley 20, and using the upper and lower molds 11 and 12 and the buffer fiber 50 which is a heat-resistant fiber sheet. The curved surface is formed and then hardened through a slow cooling furnace. When it is necessary to transform a product primarily shaped into a plate, circle, sphere, etc. into a product of a desired shape, it is gradually heated to a point where thermal deformation can be caused, and thereafter, an upper and lower mold 11 having a desired shape. After positioning at (12), it can be pressurized by external force or its own weight to obtain a desired shape.

At this time, the basic upper and lower molds (11, 12) is made of a metal or ceramic material, when the direct contact with the desired product may cause a sudden thermal deviation in the product up to the softening point, which may cause cracking and deformation of the product. That is, when the product is heated or cooled immediately after shaping, thermal expansion of the product, friction and thermal scratches due to heat shrinkage occur, thereby obtaining an incomplete product. In order to prevent this, various methods and tools for preheating the upper and lower molds (11) and (12) and maintaining the heat are used, but in the case of the additional cost, the size of the product is large, and the heat sensitivity is high, the fine thermal deviation is perfect. It is impossible to prevent it, so it requires post-work such as surface polishing after manufacturing.

In order to solve this problem, the use of a buffer fiber material capable of buffering between the product and the molds 11 and 12 may be considered. First, glass fiber, carbon fiber, ceramic fiber, granite fiber, asbestos, Inorganic fibers such as metal fibers can be used, but glass fibers, carbon fibers, and granite fibers have stiff characteristics, which are crushed or broken by friction or pressure, and infiltrate into the product in the process, which not only degrades the surface quality of the product, but also It does not have buffering properties and is limited in use. Ceramic fiber, asbestos, etc. have heat-resistance buffering properties, but they are not suitable for making fabrics because they have short fiber lengths and severe blowing of fibers, and make the environment harmful to humans or products by worsening the manufacturing environment.

On the other hand, the metal fabric made by fiberizing pure metal as a raw material not only has unique heat resistance and strength, but also has a thermal characteristic that minimizes the thermal change of a product that has risen to a softening temperature, and thus can fully function as a buffer material. In terms of the material properties of the metal, the thermal conductivity is high, which can cause a large change in the temperature of the high-temperature product, but it has a lot of pores by fiberizing to a small size, which makes the temperature change less after heating.

According to the present invention, the main fiber yarn is mixed with 95-98wt% of metal yarn and non-metallic yarn 2-5wt% of subfiber yarn to complete a single yarn. The metal yarn is preferably stainless steel or titanium yarn which is not rusted, but may be selected from steel yarn or aluminum yarn. The main fiber yarn is preferably about 6-15 µm in diameter and 4-12 cm in length. The secondary fiber yarns may be alternatively selected from the group of buffer-enhancing fibers such as aramid fiber yarns, carbonized fiber yarns, phenolic fiber yarns, polybenzoxazole (PBO) fiber yarns, and FR (Frame Retardant) fiber yarns. The subfiber yarns are preferably about 1-2 denia in diameter and 4-12 cm in length.

Although confirmed in practical use, due to the inherent thermal and strength characteristics of metal products, pure metal fibers alone do not provide an optimal buffering effect. Maximize flexibility and porosity by fiberizing metal to maximize buffer characteristics, but it has its limitations in the process of fabrication. When yarn is made and fabricated with pure metal fiber, due to the inherent agglomeration property and unstretchability of metal Buffer properties will be greatly reduced. A good way to fabricate the softness and pores obtained by fiberizing the metal and to function as it is is to use a small amount of mesophilic organic fibers that can be used at 150 ~ 500 ℃. As the organic heat resistant fibers that can be used, fibers having a Limit Oxygen Index (LOI) of 25 or more, such as aramid fiber, PBO fiber, carbonized fiber, phenol fiber and Flame Retardant (FR) fiber, can be used. When these fibers (or buffer-enhancing fibers) are fabricated by combining them with metal fibers in a certain ratio, they effectively fill the space of the metal yarn to improve the buffering properties, and the fabrication process is easier than with pure metal. It can also reduce manufacturing costs.

As another feature of the present invention, if the heat-resistant temperature of 1000-1200 ℃ non-metallic yarn made of metal metal 200-350 ℃ composed of a combination, it can be maintained in the temperature range of 400-600 ℃ when used as a buffer fabric. Metal fiber, which is the main fiber yarn, generally requires heat resistance of about 1100 ° C., but the sub-fiber yarn is completely burned at around 300 ° C. or contracted than its original size to form pores in the space. These pores provide thermal insulation in addition to cushioning as a cushioning fiber. The working temperature range of the buffer fabric is 400-600 ° C, which corresponds to the softening point of the glass. When the glass shrinks and relaxes, the buffer fabric according to the present invention also shrinks and relaxes in the same manner, so there is no fear of scratches or the like.

The composition process is characterized by adding a weaving process together with the usual spinning process. Spinning process is the process of extracting the thread by pulling the shape like rice cake and giving spin and winding the thread extracted continuously with bobbin. The weaving process is the process of weaving the same warp yarn using a bobbin-wound thread.

In more detail, the method for producing the buffer fiber of the present invention, first, the fiber length is 40-150 mm, preferably 50-100 mm, and buffered in a metal fiber of 5 ~ 50 ㎛ diameter, preferably 6-15 ㎛ 1 ~ 5 kinds of improved fibers are mixed in the weight ratio of 0.5% -60% to make the yarn. The yarn is 150tex-2000tex depending on the purpose and the position used. Recommended buffer-improving fibers are PBO fibers, aramid fibers, carbide fibers and phenolic fibers. In order to improve the durability and buffering properties of the desired fabric, it is desirable to combine several 80-200tex single yarns to make a yarn of a desired thickness. The number of strands or the thickness of the yarn depends on the desired bufferability, the thickness of the fabric and the layer structure.

For example, in order to make a hollow sphere product by welding a large number of pieces, when making multiple pieces of flat aluminum into the angle and shape of each part, a 1-3-5 layer fabric of 0.4-5 mm thickness is needed as the buffer material. In this case, 80-200tex single yarn will be used with 1-20 strands of yarn.

The shape of the fabric structure depends on the shape of the upper and lower molds and the design structure of the overall mold, which is more flexible and soft than otherwise when the contact surface is partially formed and the contact surface is slightly movable during thermal expansion and molding. Requires organization In the case of glass, when reshaping after heating to softening point, it needs the softest and most flexible structure to produce the soft curved surface of the product. It is used by making 0.3-2mm thickness using single yarn 1-3 strand of 80-200tex. . When it is used to pour the glass of the gob state into the mold and mount the product immediately after it is shaped, it is used to make 1-30 strands of 80-1000tex single yarn to make 0.4-4mm thickness of 1-4 layer structure. It is used by varying the thickness according to the mounting structure.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

According to the above configuration and operation, the present invention not only maintains long-term durability at high temperatures when reshaping metals, plastics, and glass, but also does not cause deterioration of quality such as surface deformation, breakage, and solid lines in products at softening temperatures.

Claims (3)

In the manufacturing method of the buffer fabric knitted with metal fibers: It is mixed with 95-98wt% of main fiber metal and 2-5wt% of nonmetallic fiber of subfiber yarn, and finished with one thread. The main fiber yarn is selected from stainless steel, titanium yarn, steel yarn, aluminum yarn, etc., which are not rusted, The sub-fiber yarn is selected from the group of buffer-enhancing fibers such as aramid fiber yarn, carbonized fiber yarn, phenol fiber yarn, PBO (Polybenzoxazole) fiber yarn, FR (Frame Retardant) fiber yarn, A method of manufacturing a cushioning fabric, characterized in that it is molded to maintain a predetermined heat-resistant temperature range by adding a weaving process with subfiber yarn together with the spinning process of the main fiber yarn. The method of claim 1, The method of manufacturing a buffer fabric, characterized in that the heat-resistant temperature of 1000-1200 ℃ non-metallic yarn of the metal yarn is composed of a heat-resistant temperature of 200-350 ° C mixed and maintained at a temperature range of 400-600 ℃. The buffer fabric, characterized in that produced by the method of claim 1 or 2.

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